Combined electromagnetic heating coil structure

Abstract

The invention discloses a combined electromagnetic heating coil structure, and relates to the technical field of electromagnetic heating coils, the combined electromagnetic heating coil structure comprises a machine barrel, an annular strip is arranged on the outer wall of the machine barrel, positioning rings which are symmetrically distributed left and right are arranged on the outer side of the annular strip, and a plurality of supports and a wiring terminal are arranged between the positioning rings which are symmetrically distributed left and right in the circumferential direction; the plurality of supports and the wiring terminal are evenly distributed along the annular strip in the circumferential direction, a plurality of high-frequency wires are wound between the plurality of supports and the wiring terminal in the horizontal direction, and a wire connector is arranged between the starting end and the tail end of the high-frequency wires. The high-frequency wire is accurately positioned and wound through the mounting groove, the coil density can be flexibly adjusted to achieve power step control, the interval error caused by manual winding is avoided, it is ensured that a magnetic field is evenly distributed, local overheating or cold areas are reduced, equipment vibration and abrasion are reduced, the process stability is improved, and meanwhile energy consumption waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic heating coils, and in particular to a combined electromagnetic heating coil structure. Background Art

[0002] Electromagnetic heating technology, as an efficient and clean heating method, is widely used in heating systems for industrial pipes and plastic product manufacturing equipment. Its core principle is to use electromagnetic induction to pass an alternating current through a coil to generate an alternating magnetic field, which in turn stimulates eddy currents within the magnetic metal material, converting electrical energy into thermal energy. However, existing electromagnetic heating coil structures still face numerous technical bottlenecks in practical applications, hindering performance optimization and energy efficiency improvements.

[0003] Traditional barrel or pipe heating systems usually use an electromagnetic heating coil wrapped around the barrel or pipe after wrapping it with insulation materials such as asbestos and glass wool. However, this electromagnetic heating method has the following problems: First, the insulation material used is prone to release fine fibers or harmful particles during normal use, which not only causes environmental pollution but also may endanger the health of operators; second, since the barrel or pipe surface is wrapped with an insulation layer, friction heat will be generated when the barrel is produced. If this internal friction heat is not effectively controlled, burning will occur, which will seriously affect product quality and output; finally, since the temperature cannot be effectively controlled on the equipment, the only way to meet production needs is to increase the amount of lubricant and heat stabilizer in the formula, resulting in increased formula costs.

[0004] Based on the above situation, there is an urgent need to design a combined electromagnetic heating coil structure that is easy to load and unload, can control the temperature with high precision, and has no fine fibers or harmful particles that have adverse effects on the production environment. Summary of the Invention

[0005] In order to overcome the shortcomings of traditional electromagnetic heating coil structures, such as the release of harmful particles from insulation materials that endanger health, the friction heat in the barrel that easily causes burning of materials affecting production, and the need to increase the amount of lubricants and heat stabilizers that increase costs, the present invention provides a combined electromagnetic heating coil structure.

[0006] A combined electromagnetic heating coil structure includes a barrel, an annular strip is provided on the outer wall of the barrel, and positioning rings are provided on the outside of the annular strip, which are symmetrically distributed on the left and right. The annular strip and the positioning rings are both arranged with broken openings. Several brackets and a wiring terminal are arranged circumferentially between the symmetrically distributed positioning rings. The several brackets and the wiring terminal are evenly distributed circumferentially along the annular strip. Several high-frequency wires are wound horizontally between the several brackets and the wiring terminal, and a wire connector is provided between the starting end and the end of the wire connector.

[0007] To further illustrate, each bracket is provided with evenly distributed first mounting grooves, and each terminal block is provided with evenly distributed second mounting grooves.

[0008] It is further explained that a symmetrically distributed protective cover is provided on the outside of the annular strip, and the baffles on the left and right sides of the protective cover are in close contact with the outer wall of the annular strip, so that the protective cover and the barrel have an insulating, sealing and embracing fixation effect.

[0009] It is further explained that the protective cover is set in a semi-cylindrical shape, fitting the shape of the annular strip to achieve tight wrapping, and there are several mounting holes on it for inserting fixing parts. An insulating part is provided between the two protective covers, and detachable installation is achieved through several screws and nuts.

[0010] It is further explained that each protective cover is provided with an air guide port for guiding the air flow in and out.

[0011] Further explanation: each bracket and terminal block is provided with a magnetic line guide strip.

[0012] To further illustrate, each bracket and terminal is connected to the outer wall of the annular strip respectively.

[0013] It is further explained that one of the protective covers is provided with a temperature probe wire entry hole for installing a temperature measuring element to realize real-time temperature monitoring. The protective cover is also provided with a ground wire connector for building a safe grounding loop.

[0014] Further explanation: a symmetrically distributed insulating plate is fixed to the bottom of the protective cover near the temperature probe wire inlet hole, on which an insulating tube with the same number as the mounting holes is provided, and each insulating tube passes through the adjacent mounting hole.

[0015] It is further explained that one of the protective covers is provided with a through hole that matches the wire connector and is used to provide a passage for the wire connector to pass through.

[0016] The beneficial effects of the present invention are as follows: the present invention can precisely position and wind high-frequency wires through the installation groove, flexibly adjust the coil density to achieve power step control, avoid the spacing error of manual winding, ensure uniform magnetic field distribution, reduce local overheating or cold areas, reduce equipment vibration and wear, improve process stability, and reduce energy waste.

[0017] The present invention reduces heat loss by forming a closed space through a protective cover, blocks the conductive path with a rubber isolator, and eliminates the risks of eddy current and potential difference with a single-point grounding design, effectively preventing short circuits, electromagnetic interference, and arc discharge, thereby ensuring the electrical safety of the system, extending the service life of the equipment, and facilitating disassembly and maintenance.

[0018] This invention uses high-frequency current to generate an alternating magnetic field, inducing eddy currents in the barrel to generate heat, resulting in highly efficient energy conversion. The gap between the wire and the annular strip forms an air buffer layer, which, combined with the air guide, dissipates heat, preventing local overheating and ensuring uniform barrel temperature. This improves heating efficiency and temperature control accuracy, while reducing material aging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the annular strip, positioning ring, bracket and high-frequency wire of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the high-frequency wire, terminal block, wire connector and other components of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the protective cover, screws, nuts and other components of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the components such as the bracket, wire connector and protective cover of the present invention.

[0024] Figure 6 It is a three-dimensional structural cross-sectional view of the components of the present invention, such as the insulating plate, insulating tube and temperature probe wire entry hole.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the insulating plate and the insulating cylinder of the present invention.

[0026] The parts in the accompanying drawings are marked as follows: 1: annular bar, 101: barrel, 2: positioning ring, 3: bracket, 301: first mounting slot, 4: high-frequency wire, 5: terminal block, 501: second mounting slot, 6: wire connector, 7: protective cover, 701: air guide port, 8: screw, 9: nut, 10: magnetic line guide bar, 11: insulating plate, 12: insulating cylinder, 13: temperature probe wire entry hole. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings. Example

[0028] A combined electromagnetic heating coil structure, such as Figure 1-Figure 3As shown, it includes a barrel 101, which serves as the core object to be heated. The outer wall of the barrel 101 is provided with a ring-shaped strip 1 of temperature-resistant material which plays an insulating and heat-insulating role. The outer side of the ring-shaped strip 1 is provided with a left-right symmetrically distributed positioning ring 2 for fixing the overall structure. The ring-shaped strip 1 and the positioning ring 2 are both disconnected, that is, the ring-shaped strip 1 and the positioning ring 2 are provided with an opening in the horizontal direction for easy sleeve on the barrel 101. The material of the ring-shaped strip 1 and the positioning ring 2 are both flexible and high-temperature resistant plastic. Several brackets 3 for supporting and guiding the induction coil and a terminal 5 for realizing electrical connection of the wire are circumferentially provided between the left-right symmetrically distributed positioning rings 2. Several brackets 3 and one terminal 5 are evenly distributed circumferentially along the ring-shaped strip 1 to ensure uniformity of magnetic field distribution. Several brackets 3 and one terminal 5 are all arranged in a horizontal direction. Several high-frequency wires 4 for generating an alternating magnetic field are wound horizontally between the several brackets 3 and one terminal 5. A wire connector 6 for forming a closed loop is provided between the starting end and the end thereof.

[0029] Specifically, each bracket 3 is provided with uniformly distributed first mounting grooves 301 for defining the position of the high-frequency wire 4 , and each terminal 5 is provided with uniformly distributed second mounting grooves 501 for fixing the wire ends and achieving conductive connection.

[0030] When the high-frequency wire 4 is wound on the ring bar 1, the specific operation is as follows: first, insert the starting end of the first high-frequency wire 4 into the second mounting groove 501 on the rightmost side of the terminal 5 for mechanical fixation and electrical conduction, pick up the end of the high-frequency wire 4 and wrap it around the first mounting groove 301 on the bracket 3 according to the preset path, and the end of the high-frequency wire 4 can be inserted into the second second mounting groove 501 from the right to the left of the terminal 5, and then take the second high-frequency wire 4 and insert its starting end into the second second mounting groove 501 from the right to the left of the terminal 5, so as to realize electrical series connection with the first high-frequency wire 4, and then continue to wrap the second high-frequency wire 4 along the first mounting groove 301 on the bracket 3. The first mounting groove 301 on the bracket 3 is wound in the same direction for one circle, and the end of the second high-frequency wire 4 can be inserted into the third second mounting groove 501 from right to left of the terminal 5, and so on, until the high-frequency wire 4 is fully wound, and then the two wires on the wire connector 6 are reliably connected to the rightmost second mounting groove 501 and the leftmost second mounting groove 501 on the terminal 5, respectively. In this way, a complete high-frequency current series circuit can be formed. Through the precise positioning of the first mounting groove 301 and the second mounting groove 501, the directional airflow can more efficiently and actively balance the temperature distribution between the coil and the pipe surface, thereby achieving good heat dissipation.

[0031] like Figure 4As shown, specifically, a symmetrically distributed protective cover 7 with a thermal insulation protection function to reduce heat loss is provided on the outside of the annular bar 1. The left and right baffles of the protective cover 7 are in close contact with the outer wall of the annular bar 1, and the high-frequency wires 4 on the annular bar 1 are covered in all directions. By constructing a closed space, heat loss is avoided. The sealed environment can enhance the heat aggregation effect and reduce heat loss. In conjunction with intelligent airflow adjustment, energy loss is further reduced and it plays an airflow guiding role when cooling is required.

[0032] The protective cover 7 is semi-cylindrical and fits snugly around the outer surface of the ring strip 1. It has several mounting holes for inserting fixtures and ensuring a secure installation. An insulating member is placed between the two protective covers 7. The covers are removable and easy to install for easy disassembly and maintenance, thanks to several screw-type temperature probe inlet holes 8 and nut-type temperature probe inlet holes 9, which serve as fastening connections and pass through the insulating member to ensure a secure connection. Each protective cover 7 is equipped with an air duct 701 to guide airflow and promote air circulation. Air convection is achieved through directional channels, promptly removing excess heat and achieving heat dissipation.

[0033] Specifically, each bracket 3 and terminal 5 is provided with a magnetic line guide bar 10 with an insulating isolation function to prevent current leakage. The high-frequency wire 4 is isolated through physical separation to prevent the wire from contacting the metal cover and avoid contact between the inner wall of the protective cover 7 and the high-frequency wire 4 to cause a short circuit.

[0034] like Figure 4 and Figure 6 As shown, specifically, each bracket 3 and terminal 5 is connected to the outer wall of the ring bar 1, so that the high-frequency wire 4 wound around the bracket 3 and the terminal 5 does not directly contact the ring bar 1. In this way, a certain gap will be left between the high-frequency wire 4 and the ring bar 1. With the help of the air layer to buffer the heat transfer, the stable temperature field can reduce the thermal stress of the coil and pipeline, effectively delay the aging of the material, and significantly reduce the maintenance frequency. One of the protective covers 7 is provided with a temperature probe inlet hole 13 for installing a temperature measuring element and realizing real-time temperature monitoring. The protective cover 7 is also provided with a ground wire connector for establishing a safe grounding loop. The sealed cover 7 is grounded through a reliable electrical connection. This standardizes the grounding path to ensure that the entire system has only one ground reference point, fundamentally avoiding the potential difference current caused by multiple grounding points, thereby effectively preventing short circuits and electromagnetic interference.

[0035] like Figure 6 and Figure 7Specifically, a symmetrically distributed insulating plate 11, featuring high-efficiency insulation and isolation, is fixed to the bottom of the protective cover 7 near the temperature probe inlet 13. This plate is equipped with a number of insulating tubes 12, the same number as the mounting holes, to enhance the insulation. Each insulating tube 12 extends through an adjacent mounting hole. The excellent insulating properties of rubber insulate the two protective covers 7, actively blocking poor conductive paths and preventing the alternating magnetic field generated by the coil from inducing eddy currents in the cover or the high-voltage electric field from charging the cover. This effectively eliminates the risk of current short-circuiting through the metal cover during direct contact, which could cause overload, equipment damage, or arc discharge.

[0036] One of the protective covers 7 is provided with a through hole that matches the wire connector 6 and is used to provide a passage for the wire connector 6 to pass through. Through precise size matching, the protective cover 7 is put on the wire connector 6, so that the socket of the wire connector 6 is exposed, providing convenient and safe connection conditions for the external power supply.

[0037] Working principle: Coil Assembly and Power Adjustment: During installation, first separate the annular strip 1 and retaining ring 2 from the segment opening and fit them over the barrel 101. The elastic forces of the annular strip 1 and retaining ring 2 secure them to the barrel 101. The high-frequency wire 4 is then wound in an orderly fashion through the first mounting slot 301 of the bracket 3 and the second mounting slot 501 of the terminal block 5. Continuous slot winding creates the densest coil layout, while intermittent slot winding reduces coil density and enables step-by-step adjustment of heating power. The wires are connected in series through the terminal block 5, forming a closed loop via the wire connector 6. The slots ensure uniform coil spacing and prevent magnetic field distortion caused by manual winding.

[0038] Sealed protection and safety isolation: After the coil is assembled, the symmetrically distributed protective cover 7 is fastened with screws 8 and nuts 9 to form a closed space. The insulating plate 11 and the insulating tube 12 block the conductive path of the two covers through physical insulation, and the temperature measuring element is installed in conjunction with the temperature probe wire hole 13 to achieve real-time temperature monitoring. The single-point grounding design of the ground wire connector eliminates the risk of induced electricity and ensures the electrical and personal safety of the system. Electromagnetic heating and temperature control: The controller inputs 20-100kHz high-frequency alternating current to the high-frequency wire 4 through the wire connector 6, and the wire generates an alternating magnetic field. The barrel 101 acts as a conductor, inducing eddy currents and generating Joule heat under the action of the magnetic field, realizing the conversion of electrical energy into thermal energy. The gap between the high-frequency wire 4 and the annular bar 1 forms an air buffer layer, which cooperates with the convection heat dissipation of the air guide 701 to avoid local overheating and ensure that the temperature of the barrel 101 is evenly distributed.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A combined electromagnetic heating coil structure, characterized in that: The invention comprises a barrel (101), wherein an annular strip (1) is provided on the outer wall of the barrel (101), and positioning rings (2) are provided on the outer side of the annular strip (1) and are symmetrically distributed on the left and right sides. The annular strip (1) and the positioning rings (2) are both provided with a broken opening. A plurality of brackets (3) and a wiring terminal (5) are provided between the symmetrically distributed positioning rings (2) along the circumferential direction. The plurality of brackets (3) and the wiring terminal (5) are evenly distributed along the circumferential direction of the annular strip (1). A plurality of high-frequency wires (4) are wound horizontally between the plurality of brackets (3) and the wiring terminal (5), and a wire connector (6) is provided between the starting end and the end of the wire connector.

2. A combined electromagnetic heating coil structure according to claim 1, characterized in that: Each bracket (3) is provided with evenly distributed first mounting grooves (301), and the wiring terminal (5) is provided with evenly distributed second mounting grooves (501).

3. A combined electromagnetic heating coil structure according to claim 2, characterized in that: A symmetrically distributed protective cover (7) is provided on the outside of the annular strip (1), and baffles on the left and right sides of the protective cover (7) are in close contact with the outer wall of the annular strip (1), so that the protective cover (7) and the barrel (101) have the effects of insulation sealing and embracing fixation.

4. A combined electromagnetic heating coil structure according to claim 3, characterized in that: The protective cover (7) is provided in a semi-cylindrical shape, and is tightly wrapped to fit the outer shape of the annular strip (1). A plurality of mounting holes for inserting fixing members are provided on the protective cover. An insulating member is provided between the two protective covers (7), and a plurality of screws (8) and nuts (9) are used to achieve detachable installation.

5. A combined electromagnetic heating coil structure according to claim 4, characterized in that: Each protective cover (7) is provided with an air guide port (701) for guiding the inflow and outflow of air.

6. A combined electromagnetic heating coil structure according to claim 5, characterized in that: Each bracket (3) and the wiring terminal (5) is provided with a magnetic line guide bar (10).

7. A combined electromagnetic heating coil structure according to claim 6, characterized in that: Each bracket (3) and the wiring terminal (5) are respectively connected to the outer wall of the ring bar (1).

8. A combined electromagnetic heating coil structure according to claim 7, characterized in that: One of them The protective cover (7) is provided with a temperature probe inlet hole (13) for installing a temperature measuring element and realizing real-time temperature monitoring. The protective cover (7) is also provided with a ground wire connector for constructing a safety grounding loop.

9. A combined electromagnetic heating coil structure according to claim 8, characterized in that: A symmetrically distributed insulating plate (11) is fixed to the bottom of the protective cover (7) on one side near the temperature probe inlet hole (13), and an insulating tube (12) having the same number as the mounting holes is provided on the insulating plate. Each insulating tube (12) passes through an adjacent mounting hole.

10. A combined electromagnetic heating coil structure according to claim 9, characterized in that: One of them The protective cover (7) is provided with a through hole that matches the wire connector (6) and is used to provide a passage for the wire connector to pass through.

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