CN210533068U - Medium-frequency electromagnetic induction coil for continuously heating steel plate - Google Patents
Medium-frequency electromagnetic induction coil for continuously heating steel plate Download PDFInfo
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- CN210533068U CN210533068U CN201921443735.6U CN201921443735U CN210533068U CN 210533068 U CN210533068 U CN 210533068U CN 201921443735 U CN201921443735 U CN 201921443735U CN 210533068 U CN210533068 U CN 210533068U
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Abstract
The utility model relates to the technical field of metallurgy intermediate frequency furnaces, in particular to an intermediate frequency electromagnetic induction coil for continuously heating steel plates, which is characterized in that a copper pipe coil is coiled to form a heating cavity with a rectangular cross section, the heating cavity is arranged in a heating area between a steel plate inlet and a steel plate outlet in the intermediate frequency induction furnace in a segmented manner, and the copper pipe coils of adjacent heating cavities are independent; a carrier roller is arranged between the adjacent heating cavities, and an oil filling hole is formed in the outer end cover of the bearing block. Compared with the prior art, the beneficial effects of the utility model are as follows: 1) the steel plate can be continuously heated in the continuous conveying and moving process of the steel plate, and the cooling effect of the coil is good; 2) the sectional copper pipe rings are distributed, so that the maintenance and the replacement are convenient; 3) the supporting rollers which are uniformly arranged can ensure that the steel plate is in a straight state in the moving process, friction between the steel plate and the coil due to thermal deformation is avoided, and the long-term service life of the medium-frequency electromagnetic induction furnace is finally prolonged.
Description
Technical Field
The utility model relates to a metallurgical intermediate frequency furnace technical field especially relates to an intermediate frequency electromagnetic induction coil for steel sheet continuous heating.
Background
The medium frequency electric furnace is a power supply device which converts power frequency 50HZ alternating current into medium frequency (more than 300HZ to 10000 HZ), converts three-phase power frequency alternating current into direct current after rectification, converts the direct current into adjustable medium frequency current, supplies the medium frequency alternating current flowing through a capacitor and an induction coil, generates high-density magnetic lines in the induction coil, cuts metal materials contained in the induction coil, and generates large eddy current in the metal materials. This eddy current also has some properties of medium frequency current, i.e. the free electrons of the metal itself flow in the resistive metal body to generate heat. For example, a metal cylinder is placed in an induction coil with alternating medium-frequency current, the metal cylinder is not in direct contact with the induction coil, the temperature of the electrified coil is low, but the surface of the cylinder is heated to be reddish or even melted, and the reddish and melted speed can be realized by only adjusting the frequency and the intensity of the current. If the cylinder is placed in the center of the coil, the temperature of the periphery of the cylinder is the same, uniform heating can be realized, and heating requirements of smelting, quenching, diathermy and the like are met.
The Chinese patent with the patent application number of 201410318019.0 discloses an electromagnetic induction electric heater, which comprises a base, a tank body, an insulating layer a, an electric conductor, a heat preservation layer, an insulating layer b, a flange, an inlet, an outlet and an electromagnetic coil, wherein the tank body is connected to the base, the insulating layer a is arranged on the inner wall of the tank body, the electric conductor is arranged in the tank body, the heat preservation layer is connected to the outer side of the electric conductor, the insulating layer b is connected to the outer side of the heat preservation layer, the flange is arranged at the top of the tank body, the. The electromagnetic coil uses a three-phase power frequency (or intermediate frequency) alternating current power supply to rapidly heat and raise the temperature of a medium in the tank body, and the structure is only suitable for discontinuous heat treatment production and cannot realize continuous operation.
With the rapid development of national economy, the demand of ultrahigh-strength plates and high-added-value steel plates is greatly improved. The production of the high-performance steel plate by the heat treatment mode of electromagnetic induction heating is an advanced production mode, the electric efficiency of an induction power supply can reach more than 94 percent, no pollutant is discharged, austenite grains are refined after the heat treatment of the steel plate, and the strength is improved by 50MPa to 100MPa after quenching compared with other heating modes. However, for the continuous heat treatment process of the steel plate, at present, no more suitable medium-frequency electromagnetic induction furnace, especially a medium-frequency electromagnetic induction coil, exists, and the medium-frequency electromagnetic induction furnace is required to be free from oxidation damage caused by overhigh temperature of the coil due to baking of high-temperature steel in the continuous heating process, so that the long-term operation life of the medium-frequency electromagnetic induction furnace is prolonged.
Disclosure of Invention
The utility model aims at providing a medium frequency electromagnetic induction coil for steel plate continuous heating, overcoming the deficiencies of the prior art, continuously heating the steel plate in the process of continuously conveying and moving the steel plate, and avoiding the oxidation damage caused by overhigh temperature of the coil due to the baking of the high-temperature steel plate; the sectional distribution design is convenient for maintenance and replacement; the supporting rollers which are uniformly arranged can ensure that the steel plate is in a straight state in the moving process, and cannot cause friction with the coil due to thermal deformation to damage the induction coil, so that the long-term operation life of the medium-frequency electromagnetic induction furnace is finally prolonged.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
a medium-frequency electromagnetic induction coil for continuously heating a steel plate comprises a copper pipe coil wound by a copper pipe and joints at two ends of the copper pipe, wherein the joints comprise a water inlet joint and a water outlet joint; the heating cavities are arranged in a segmented mode within the length range of the heating area, and copper pipe rings of adjacent heating cavities are independent; be equipped with the bearing roller between the adjacent heating chamber, the bearing roller both ends are connected with the bearing roller seat through bearing frame, the both sides heat preservation wall body fixed connection of bearing roller seat and intermediate frequency induction furnace, the outer end cover of bearing frame exposes heat preservation wall body's surface, and outer end covers and is equipped with the oil filler point.
Preferably, the water inlet joint and the water outlet joint are exposed out of the top heat-insulating wall of the intermediate frequency induction furnace and are respectively connected with the water inlet main pipe and the water outlet main pipe, and the water inlet main pipe and the water outlet main pipe are both connected with the water cooling system.
Preferably, the number of the copper pipe rings arranged in any section of the heating cavity is 15-35.
Preferably, a valve is arranged on the water inlet joint and the water outlet joint of any section of the heating cavity.
Preferably, the outer surface of the outer end cover is provided with a heat preservation cover, and the heat preservation cover is connected with the heat preservation wall body through bolts.
Preferably, the heat preservation cover is made of an aluminum silicate ceramic fiberboard.
Preferably, the copper pipe ring is connected with a refractory brick beam arranged at the top and/or the bottom in the medium-frequency induction furnace through a heat-resistant steel clamp.
Compared with the prior art, the beneficial effects of the utility model are as follows: 1) the steel plate can be continuously heated in the continuous conveying and moving process of the steel plate, the cooling effect of the water flowing through the hollow coil is good, and the steel plate cannot be oxidized and damaged due to overhigh temperature; 2) the sectional type copper pipe rings are distributed and designed, so that the maintenance and the replacement are convenient, and the integral operation of the medium-frequency electromagnetic induction furnace cannot be influenced due to the damage of a certain group of copper pipe rings; 3) the supporting rollers which are uniformly arranged can ensure that the steel plate is in a straight state in the moving process, the induction coil cannot be damaged due to friction caused by thermal deformation and the coil, and finally the long-term operation life of the medium-frequency electromagnetic induction furnace is prolonged.
Drawings
Fig. 1 is an application schematic diagram of an embodiment of the medium frequency electromagnetic induction coil of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a top view of the medium frequency electromagnetic coil of fig. 1.
FIG. 4 is a schematic view of the connection between the medium frequency electromagnetic induction coil and the refractory brick beam of the present invention.
In the figure: 1-copper pipe ring, 101-water inlet joint, 102-water outlet joint, 103-valve, 2-heating cavity, 3-intermediate frequency induction furnace, 301-steel plate inlet, 302-steel plate outlet, 4-carrier roller, 5-bearing seat, 6-carrier roller seat, 7-heat preservation wall, 8-outer end cover, 9-oil hole, 10-water inlet main pipe, 11-water outlet main pipe, 12-heat preservation cover, 13-bolt, 14-refractory brick beam, 15-heat-resistant steel clamp, 16-steel plate and 17-power supply wire column.
Detailed Description
The following embodiments are further described in the following:
in the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, which are schematic diagrams illustrating an application of an embodiment of a medium frequency electromagnetic induction coil for continuously heating a steel plate according to the present invention, in a medium frequency induction furnace 3, a copper tube coil 1 is coiled to form a heating chamber 2 with a rectangular cross section, and the copper tube coil 1 is arranged in a heating area from a steel plate inlet 301 to a steel plate outlet 302 in the medium frequency induction furnace 3; the copper pipe rings 1 are arranged in the length range of the heating area in a segmented manner, the copper pipe rings 1 of adjacent heating cavities are independent of each other, and the number of the copper pipe rings 1 arranged in one heating cavity 2 is 20, so that the installation is convenient. Each group of copper pipe coils 1 are electrically connected with power supply posts 17 arranged on the heat insulation wall bodies 7 at two sides, and the medium-frequency electromagnetic induction coils in the medium-frequency induction furnace 3 are powered by an external power supply to heat and work. The alternating current power supply is at an intermediate frequency of 150-10000 Hz. Under the action of the alternating electromagnetic field in the induction furnace, eddy currents are generated inside the heating cavity 2 so as to achieve the heating or melting effect.
Be equipped with bearing roller 4 between adjacent copper pipe circle 1, the bearing roller both ends are connected with bearing roller seat 6 through bearing frame 5, and bearing roller seat 6 and the thermal insulation wall 7 fixed connection of 3 both sides of intermediate frequency induction furnace, the outer end cover 8 of bearing frame 5 exposes the surface of both sides thermal insulation wall 7, is equipped with oil filler point 9 on the outer end cover 8, annotates in the oil filler point 9 and has had high temperature resistant silicone grease.
The water inlet connector 101 and the water outlet connector 102 on the copper pipe ring 1 are exposed out of the top heat-insulating wall of the intermediate frequency induction furnace 3, the valves 103 are arranged on the water inlet connector 101 and the water outlet connector 102 on the section of heating cavity 2, the water inlet connector 101 and the water outlet connector 102 are respectively connected with the water inlet main pipe 10 and the water outlet main pipe 11, the water inlet main pipe 10 and the water outlet main pipe 11 are both connected with a water cooling system, continuous supply of cooling water in the copper pipe ring is achieved, and the temperature of the coil is kept within a safe temperature range. The outer surface of the outer end cover 8 is provided with a heat preservation cover 12 made of an aluminum silicate ceramic fiber board, and the heat preservation cover 12 is connected with the heat preservation wall 7 through a bolt 13. The arrangement of the heat preservation cover 12 not only facilitates the oil injection of the bearing seat 5 and the bearing seat 6, but also plays a role in heat preservation and can avoid the loss of heat in the medium-frequency induction furnace.
Referring to fig. 4, the copper tube coil 1 is connected with a refractory brick beam 14 arranged at the bottom in the medium frequency induction furnace through a heat-resistant steel clamp 15, so that the coil keeps stable relative position, and production accidents caused by friction between the coil and a steel plate 16 after thermal deformation are avoided.
The embodiments described above are only specific examples selected for the purpose of illustrating the objects, technical solutions and advantages of the present invention in detail, but should not limit the scope of the invention, and all modifications, equivalent substitutions and improvements made without departing from the spirit and principles of the present invention should fall within the scope of the present invention.
Claims (7)
1. A medium-frequency electromagnetic induction coil for continuously heating a steel plate comprises a copper pipe coil wound by a copper pipe and joints at two ends of the copper pipe, wherein the joints comprise a water inlet joint and a water outlet joint; the heating cavities are arranged in a segmented mode within the length range of the heating area, and copper pipe rings of adjacent heating cavities are independent; be equipped with the bearing roller between the adjacent heating chamber, the bearing roller both ends are connected with the bearing roller seat through bearing frame, the both sides heat preservation wall body fixed connection of bearing roller seat and intermediate frequency induction furnace, the outer end cover of bearing frame exposes heat preservation wall body's surface, and outer end covers and is equipped with the oil filler point.
2. The medium-frequency electromagnetic induction coil for continuously heating the steel plate as claimed in claim 1, wherein the water inlet joint and the water outlet joint are exposed out of the top heat-insulating wall of the medium-frequency induction furnace and are respectively connected with a water inlet main pipe and a water outlet main pipe, and the water inlet main pipe and the water outlet main pipe are both connected with a water cooling system.
3. The medium-frequency electromagnetic induction coil for continuously heating the steel plate as claimed in claim 1, wherein the number of the copper pipe rings arranged in any section of the heating cavity is 15-35.
4. The medium frequency electromagnetic induction coil for continuously heating the steel plate as claimed in claim 1 or 2, wherein the water inlet joint and the water outlet joint on any section of the heating cavity are provided with valves.
5. The medium-frequency electromagnetic induction coil for continuously heating the steel plate as claimed in claim 1, wherein the outer surface of the outer end cover is provided with a heat-insulating cover, and the heat-insulating cover is connected with the heat-insulating wall body through bolts.
6. The medium-frequency electromagnetic induction coil for continuously heating the steel plate as claimed in claim 5, wherein the heat-insulating cover is made of an aluminum silicate ceramic fiberboard.
7. The medium frequency electromagnetic induction coil for continuous heating of steel sheets as claimed in claim 1, wherein the copper pipe coil is connected with refractory brick beams provided at the top and/or bottom of the medium frequency induction furnace by heat resistant steel jigs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921443735.6U CN210533068U (en) | 2019-09-02 | 2019-09-02 | Medium-frequency electromagnetic induction coil for continuously heating steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921443735.6U CN210533068U (en) | 2019-09-02 | 2019-09-02 | Medium-frequency electromagnetic induction coil for continuously heating steel plate |
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| Publication Number | Publication Date |
|---|---|
| CN210533068U true CN210533068U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921443735.6U Active CN210533068U (en) | 2019-09-02 | 2019-09-02 | Medium-frequency electromagnetic induction coil for continuously heating steel plate |
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| Country | Link |
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| CN (1) | CN210533068U (en) |
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- 2019-09-02 CN CN201921443735.6U patent/CN210533068U/en active Active
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