CN210781425U

CN210781425U - Coil heater for medium-frequency electromagnetic induction heating

Info

Publication number: CN210781425U
Application number: CN201921968382.1U
Authority: CN
Inventors: 袁立建; 应富江; 郑书雄; 毛昀; 葛华平
Original assignee: Zhenjiang Yuanjing Electronic Technology Co ltd
Current assignee: Zhenjiang Yuanjing Electronic Technology Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-06-16
Anticipated expiration: 2029-11-14

Abstract

The utility model discloses a coil heater for medium frequency electromagnetic induction heating, which comprises a heater framework and a heating coil, wherein the heater framework comprises a plurality of framework base plates and framework connecting sheets; the framework base plates are vertically arranged and connected together in parallel through framework connecting sheets, and the lap joints of the framework connecting sheets can be freely bent along the transverse direction of the shaft; a U-shaped notch for accommodating a heating coil is arranged at one side edge of the framework base plate, and the heating coil is fixed in the U-shaped notch in a winding mode. The molded surface of the workpiece which can be heat treated according to the requirement is flexibly adjusted, the heating coil is tightly attached to the workpiece, and the workpiece is uniformly heated. The coil heaters can be spliced by the edge connecting sheet, so that the welding surface of a large-sized workpiece can be heated in a subarea manner, and the temperature of each area can be accurately controlled; on the other hand, the heater is not limited by the shape of the heater, splicing can be adjusted according to the size of the processed workpiece, and the heater has a very good use value.

Description

Coil heater for medium-frequency electromagnetic induction heating

Technical Field

The utility model relates to a coil heater for intermediate frequency electromagnetic induction heating.

Background

When manufacturing and processing pipelines and pressure containers used in power stations, chemical industries and other industries, preheating before welding and postheating are often needed, and heat treatment is also needed after welding. At present, the more popular form of welding heat treatment is conventional resistance heating. The resistance heating directly transfers heat to a workpiece to be heated through conduction and radiation, and the configuration and the quality of a heater directly influence the heating speed, the heating degree and the heating uniformity of the workpiece. The existing heater is mostly an integral coiled resistance heater, the shape is fixed and stiff, the adaptability to the profile of a workpiece is poor, particularly, when a curved surface workpiece is heated, the heater cannot be attached to the profile of the workpiece frequently, heating is not uniform, the heat treatment quality is low, the temperature difference between the inner wall and the outer wall of a welding seam is large, the welding seam is high in hardness, poor in toughness and easy to break.

SUMMERY OF THE UTILITY MODEL

In view of the existing problems, the utility model provides a coil heater for medium frequency electromagnetic induction heating, firstly adopted the electromagnetic induction heating principle, the heater is fixed outside the outer insulation material of work piece, needn't require the heater to hug closely the welding bead of work piece, and the requirement that the low efficiency conduction radiation resistance heating mode must let the heater closely paste the work piece; secondly, through the structural improvement of the heater framework, the coil heater has flexibility, flexibility and adjustability, and the fitting degree of the coil heater and the molded surface of the workpiece is enhanced. The heat treatment quality is improved, and the electric energy consumption is reduced. The specific technical scheme is as follows:

a coil heater for medium-frequency electromagnetic induction heating comprises a heater framework and a heating coil, wherein the heater framework comprises a plurality of framework base plates and framework connecting sheets; the framework base plates are vertically arranged and connected together in parallel through framework connecting sheets, and the lap joints of the framework connecting sheets can be freely bent along the transverse direction of the shaft; a U-shaped notch for accommodating a heating coil is arranged at one side edge of the framework base plate, and the heating coil is fixed in the U-shaped notch in a winding mode.

The coil heater for medium-frequency electromagnetic induction heating further comprises a framework cover plate, wherein the framework cover plate corresponds to the framework base plate one by one, and the framework cover plate is fixedly connected to one side of the framework base plate, which is provided with the U-shaped notch.

Preferably, the framework base plate, the framework connecting sheet and the framework cover plate are all made of strip-shaped high-temperature-resistant insulating materials.

In the coil heater for medium-frequency electromagnetic induction heating, the framework base plate and the framework cover plate are both high-temperature-resistant insulating plates with equal length, and bolt connecting holes are axially formed in two ends of the framework base plate and are connected with the framework connecting plate through bolts; the side of skeleton bed plate and skeleton apron corresponds position department and all is equipped with a plurality of screw connection holes, passes through the screw connection between the two.

Preferably, the bolt and the screw are both nonmagnetic metal standard parts.

In the coil heater for medium-frequency electromagnetic induction heating, the framework connecting sheet is a plurality of high-temperature-resistant insulating plates with different lengths, and the end parts of the framework connecting sheet are provided with lap joint holes for lap joint; the framework base plate is positioned at the lap joint of the framework connecting sheets.

Preferably, in the coil heater for medium-frequency electromagnetic induction heating, the framework connecting sheet is divided into a middle connecting sheet and an edge connecting sheet, and the middle connecting sheet is used for connecting framework base plates of the coil heater; the side connecting pieces are used for connecting the coil heaters.

Further preferably, the lapping holes at two ends of the middle connecting sheet are one, and the lapping holes at two ends of the side connecting sheet are multiple.

According to the coil heater for medium-frequency electromagnetic induction heating, one side of the heater framework, which is provided with the heating coil, is mounted close to a workpiece to be heated, and a heat insulation layer is arranged between the heating coil and the workpiece to be heated.

Preferably, the heat insulation layer is made of a non-metal high-temperature-resistant heat insulation material.

The utility model has the advantages that:

the utility model discloses a skeleton connection piece links together a plurality of skeleton bed plates and forms the skeleton that loads heater coil to skeleton connection piece overlap joint department can be followed the horizontal free buckling of axle, and the work piece profile that can heat treatment as required carries out nimble adjustment, closely laminates heating coil and work piece, guarantees that the work piece is heated evenly. In addition, the framework connecting sheet of the utility model is also divided into a middle connecting sheet and an edge connecting sheet, and a plurality of coil heaters can be spliced for use through the edge connecting sheet, so that on one hand, the welding surface of a large-sized workpiece can be treated in a partitioning manner, and the temperature can be treated in a refining manner; on the other hand, the heater is not limited by the shape, splicing can be adjusted according to the size of the processed workpiece, and the heater has a very good use value.

Drawings

Fig. 1 is a schematic cross-sectional view of a coil heater for medium frequency electromagnetic induction heating according to the present invention for heating a workpiece;

fig. 2 is a front view of the coil heater for medium frequency electromagnetic induction heating of the present invention;

FIG. 3 is a front view of the heater frame of the present invention;

FIG. 4 is a schematic structural view of the skeleton base plate of the present invention;

fig. 5 is a schematic view of the framework cover plate of the present invention.

In the figure: 1. a heater skeleton; 11. a skeleton base plate; 111. a U-shaped notch; 112. connecting holes of bolts; 113. a screw connection hole; 12. a framework connecting sheet; 120. a lap joint hole; 121. a middle connecting sheet; 122. an edge connecting sheet; 13. a framework cover plate; 2. a heating coil; 3. a bolt; 4. a screw; 5. a workpiece to be heated; 6. a heat preservation and insulation layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiment is only one embodiment of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The specific embodiment is as follows:

a coil heater for medium-frequency electromagnetic induction heating, as shown in fig. 1 to 5, comprises a heater skeleton 1 and a heating coil 2, wherein the heater skeleton 1 comprises a plurality of skeleton base plates 11 and skeleton connecting plates 12; the framework base plates 11 are vertically arranged and connected together in parallel through framework connecting pieces 12, and the lap joints of the framework connecting pieces 12 can be freely bent along the transverse direction of the shaft; skeleton bed plate 11's a side edge department is equipped with the U type breach 111 that holds heating coil 2, heating coil 2 coils to be fixed in U type breach 111, and the work piece profile that can heat treat as required carries out nimble adjustment, with heating coil and the even laminating of work piece, guarantees that the work piece is heated evenly.

This embodiment a coil heater for intermediate frequency electromagnetic induction heating still include skeleton apron 13,

skeleton apron

13 and 11 one-to-one of skeleton bedplate to fixed connection is in the one side that skeleton bedplate 11 was equipped with U type breach 111, prevents to drop with fixed heating coil. The framework base plate 11, the framework connecting plate 12 and the framework cover plate 13 are all made of strip-shaped high-temperature-resistant insulating materials.

In this embodiment, the skeleton base plate 11 and the skeleton cover plate 13 are both equal-length high-temperature-resistant insulating plates, and bolt connection holes 112 are axially formed in both ends of the skeleton base plate 11 and are connected with the skeleton connecting pieces 12 through bolts 3; the side of skeleton bed plate 11 and skeleton apron 13 corresponds position department and all is equipped with a plurality of screw connecting holes 113, connects through screw 4 between the two, bolt 3, screw 4 are non-magnetic metal standard component.

In addition, in the coil heater for medium-frequency electromagnetic induction heating, the framework connecting sheet 12 is a plurality of high-temperature-resistant insulating sheets with different lengths, and the end part of the framework connecting sheet is provided with a lap joint hole 120 for lap joint; the framework base plate 11 is located at the lap joint of the framework connecting sheet 12. The framework connecting piece 12 is divided into a middle connecting piece 121 and an edge connecting piece 122, and the middle connecting piece 121 is used for connecting framework base plates 11 of the coil heater; the edge connecting pieces 122 are used for connection between the coil heaters. The lap joint holes 120 at two ends of the middle connecting piece 121 are one, the lap joint holes 120 at two ends of the side connecting piece 122 are multiple, and the coil heaters can be spliced together for use through the side connecting piece, so that on one hand, the welding surface of a large-sized workpiece can be processed in a partitioning mode, and the processing temperature can be refined; on the other hand, the heater is not limited by the shape, splicing can be adjusted according to the size of the processed workpiece, and the heater has a very good use value.

In the coil heater for medium-frequency electromagnetic induction heating described in this embodiment, one side of the heater framework 1 where the heating coil 2 is arranged is installed close to the workpiece to be heated, a heat insulation layer 6 is arranged between the heating coil 2 and the workpiece 5 to be heated, and the heat insulation layer 6 is preferably made of a non-metal high-temperature-resistant heat insulation material, so that the heating loss temperature is reduced, and the heating speed is faster.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, this does not include only a single embodiment, but rather such description is for clarity only, and those skilled in the art will be able to make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

Claims

1. A coil heater for intermediate frequency electromagnetic induction heating, includes heater skeleton (1) and heating coil (2), its characterized in that: the heater framework (1) comprises a plurality of framework base plates (11) and framework connecting plates (12); the framework base plates (11) are vertically arranged and connected together in parallel through framework connecting pieces (12), and the lap joints of the framework connecting pieces (12) can be freely bent along the transverse direction of the shaft; one side edge of skeleton bed plate (11) is equipped with U type breach (111) that hold heating coil (2), heating coil (2) coil is fixed in U type breach (111).

2. A coil heater for medium frequency electromagnetic induction heating according to claim 1, wherein: still include skeleton apron (13), skeleton apron (13) and skeleton bed plate (11) one-to-one to fixed connection is in skeleton bed plate (11) one side that is equipped with U type breach (111).

3. A coil heater for medium frequency electromagnetic induction heating according to claim 1 or 2, characterized in that: the framework base plate (11), the framework connecting plate (12) and the framework cover plate (13) are all made of strip-shaped high-temperature-resistant insulating materials.

4. A coil heater for medium frequency electromagnetic induction heating according to claim 3, wherein: the framework base plate (11) and the framework cover plate (13) are both high-temperature-resistant insulating plates with equal length, and bolt connecting holes (112) are axially formed in two ends of the framework base plate (11) and are connected with the framework connecting plates (12) through bolts (3); the side of skeleton bed plate (11) and skeleton apron (13) corresponds position department and all is equipped with a plurality of screw connecting holes (113), connects through screw (4) between the two.

5. A coil heater for medium frequency electromagnetic induction heating according to claim 4, wherein: the bolt (3) and the screw (4) are both nonmagnetic metal standard parts.

6. A coil heater for medium frequency electromagnetic induction heating according to claim 3, wherein: the framework connecting sheet (12) is a plurality of high-temperature-resistant insulating plates with different lengths, and the end part of the framework connecting sheet is provided with a lapping hole (120) for lapping; the framework base plate (11) is positioned at the lap joint of the framework connecting sheet (12).

7. A coil heater for medium frequency electromagnetic induction heating according to claim 1 or 6, characterized in that: the framework connecting piece (12) is divided into a middle connecting piece (121) and an edge connecting piece (122), and the middle connecting piece (121) is used for connecting framework base plates (11) of the coil heater; the edge connecting pieces (122) are used for connecting the coil heaters.

8. The coil heater for medium frequency electromagnetic induction heating according to claim 7, characterized in that: the middle connecting piece (121) is provided with one overlapping hole (120) at two ends, and the side connecting piece (122) is provided with a plurality of overlapping holes (120) at two ends.

9. A coil heater for medium frequency electromagnetic induction heating according to claim 1, wherein: one side of the heater framework (1) provided with the heating coil (2) is installed close to the workpiece to be heated, and a heat insulation layer (6) is arranged between the heating coil (2) and the workpiece (5) to be heated.

10. A coil heater for medium frequency electromagnetic induction heating according to claim 9, wherein: the heat insulation layer (6) is made of a non-metal high-temperature-resistant heat insulation material.