CN114688872A - Vertical high-temperature induction heating furnace with lengthened heating body - Google Patents

Vertical high-temperature induction heating furnace with lengthened heating body Download PDF

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Publication number
CN114688872A
CN114688872A CN202110138271.3A CN202110138271A CN114688872A CN 114688872 A CN114688872 A CN 114688872A CN 202110138271 A CN202110138271 A CN 202110138271A CN 114688872 A CN114688872 A CN 114688872A
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CN
China
Prior art keywords
heating
heat
heating body
insulating layer
furnace
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Pending
Application number
CN202110138271.3A
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Chinese (zh)
Inventor
言伟雄
袁建陵
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Zhuzhou Fullad Technology Co ltd
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Zhuzhou Fullad Technology Co ltd
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Publication of CN114688872A publication Critical patent/CN114688872A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F27B14/061—Induction furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/14—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0033—Linings or walls comprising heat shields, e.g. heat shieldsd
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F27B14/061—Induction furnaces
    • F27B2014/066—Construction of the induction furnace

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)
  • Furnace Details (AREA)

Abstract

A vertical high-temperature induction heating furnace with a lengthened heating body comprises a furnace body, wherein the heating body (1), a heat-insulating layer and an inductor (3) are sequentially arranged in the furnace body, a hearth (50) for placing materials is arranged in the middle of the heating body (1), the heat-insulating layer (2) is arranged outside the hearth (50), and the inductor (3) is arranged outside the heat-insulating layer (2); the inductor (3) comprises a heating coil (3001) which is wound on the outer side of the heat-insulating layer (2) and corresponds to the height of the hearth (50); the upper end face of the heating body is higher than the upper end face of a heating coil (3001) in the inductor (3) in a mode of sleeving a thin-wall sleeve (1002) above the heating body or increasing the height of the heating body. By arranging the lengthened heating body, the heat preservation layer 2 can be made of powder materials, the furnace temperature is favorably improved, the service life is prolonged, and the use cost is favorably reduced by adopting a thin-wall sleeve.

Description

Vertical high-temperature induction heating furnace with lengthened heating body
Technical Field
The invention relates to induction heating equipment, in particular to a vertical high-temperature induction heating furnace with a lengthened heating body.
Background
The high-temperature induction heating furnace is electromagnetically heated, and the temperature in the furnace body can reach more than 3000 ℃. The high temperature has extremely high requirements on the heat preservation and heat insulation functions of the furnace body, so that the heat preservation material is required to have good heat preservation performance in a high-temperature environment, and the heat of the hearth is required to be brought out of the hearth by reducing high-temperature structural parts as much as possible. The hearth heat-insulating layer of the existing high-temperature induction heating furnace is formed by wrapping solid heat-insulating materials such as carbon felt, graphite felt, carbon fiber cotton and the like on the outer side of a heating body. The solid heat-insulating material is seriously burnt in a high-temperature environment, and the heat-insulating effect is influenced. In order to ensure the heat preservation effect, the technical means of the powder heat preservation layer is adopted at present, the carbon paper powder heat preservation material is arranged around the heating body, the volume of the material can be settled when the material is heated, and a proper scheme needs to be adopted to ensure that the heat preservation effect is still achieved when the powder is settled.
Disclosure of Invention
The invention provides a high-temperature induction heating furnace with a lengthened heating body, and solves the problem that the existing induction heating furnace is poor in heat preservation effect.
The technical scheme adopted by the invention is as follows:
a high-temperature induction heating furnace with a lengthened heating body comprises a furnace body, wherein the heating body (1), a heat-insulating layer and an inductor (3) are sequentially arranged in the furnace body, a hearth (50) for placing materials is arranged in the middle of the heating body (1), the heat-insulating layer (2) is arranged outside the hearth (50), and the inductor (3) is arranged outside the heat-insulating layer (2); the inductor (3) comprises a heating coil (3001) which is wound on the outer side of the heat-insulating layer (2) and corresponds to the height of the hearth (50); the heating body is higher than the upper end surface of a heating coil (3001) in the inductor (3) by adopting the following mode:
a thin-wall sleeve (1002) is sleeved above the heating body;
secondly, the height of the heating body is increased, so that the increased height is consistent with the height of the heating body and the height of the thin-wall sleeve (1002).
Further, the heating element (1) is columnar, the thin-wall sleeve (1002) is superposed above the heating element (1), and the wall thickness of the thin-wall sleeve (1002) is smaller than that of the heating element (1).
Further, the wall thickness of the upper part of the elongated heating element is smaller than the wall thickness of the middle and lower parts.
Further, the heating element (1) is formed by stacking a plurality of segments of tubular bodies.
Furthermore, the heating element (1) is a short heating element which is slightly higher than the height of the hearth, and the inner cover is arranged at the top end of the heating element.
Furthermore, the heating element (1) is a high heating element which is higher than the hearth, the inner wall of the heating element (1) is provided with a step (1001), and the inner cover is arranged on the step (1001).
Further, the thin-walled sleeve is arranged above the inner cover.
Further, the thin-wall sleeve is arranged at the outer side position of the inner cover.
Furthermore, an outer step is arranged on the outer side of the upper end of the heating body, and a thin-wall sleeve is arranged on the outer step.
Furthermore, the heating body (1) and the thin-wall sleeve (1002) above the heating body are of an integral structure.
Further, the heat insulation layer is a solid heat insulation layer and/or a powder heat insulation layer, and the solid heat insulation layer is a carbon felt or a graphite felt.
Furthermore, the powder heat-insulating layer (2) comprises a container arranged at the periphery of the heating body (1) and a carbon powder heat-insulating material filled in the container.
Further, the upper insulating layer (9) or the upper part is arranged on the inner side of the thin-wall sleeve (1002).
Compared with the prior art, the invention has the beneficial effects that:
in order to ensure that the induction furnace stably works in a high-temperature environment of 3000 ℃, a powder heat-insulating layer is adopted between a heating body and an inductor, and because the powder heat-insulating layer can generate a sedimentation phenomenon at high temperature, more powder heat-insulating layer allowance is required to be arranged above a hearth.
Drawings
FIG. 1 is a vertical high temperature induction heating furnace with a lengthened heating element;
FIG. 2 is a structural view of a vertical high-temperature induction heating furnace of a short heating element;
FIG. 3 is a structural view of a vertical high temperature induction heating furnace of a high heating element;
FIG. 4 shows a vertical high-temperature induction heating furnace with an elongated heating element.
Detailed Description
The invention is further illustrated by the following specific examples. The starting materials and methods employed in the examples of the present invention are those conventionally available in the market and conventionally used in the art, unless otherwise specified.
Example 1
As shown in fig. 1, a vertical high-temperature induction heating furnace with a lengthened heating element comprises a furnace body 4, a heating element 1, a heat preservation layer and an inductor 3 which are arranged in the furnace body in sequence from inside to outside, wherein the heating element 1 is cylindrical, the inductor 3 is arranged at the outer ring position of the heating element 1, the inductor 3 is composed of a heating coil 3001 and a pouring layer 3007, and the pouring layer 3007 is poured by adopting high-temperature-resistant insulating cement to wrap the heating coil 3001. A space is arranged between the inductor 3 and the heating element 1 to form an annular space surrounding the heating element 1, the annular space is filled with carbon powder materials, and the filler in the embodiment is carbon black to form a sleeve type powder heat-insulating layer 2. The position of the inner side of the heating body 1 corresponding to the height of the heating coil 3001 of the inductor 3 is a hearth 50 for placing materials, the heating coil 3001 corresponds to the height of the hearth 50, the height of the heating body 1 is higher than the upper end surfaces of the hearth and the heating coil, the height of the heat preservation layer is consistent with the height of the heating body, and the lengthened heating body wall is used as the inner wall of the powder heat preservation layer and bears the carbon powder heat preservation materials of the powder heat preservation layer. The upper end of the hearth 50 is provided with an inner cover; an upper heat-insulating layer 9 is arranged above the hearth 50, and a lower heat-insulating layer 10 is arranged below the hearth.
The upper heat-insulating layer 9 and the lower heat-insulating layer 10 are carbon felts and graphite felts.
An upper powder heat-insulating layer 7 and a lower powder heat-insulating layer 8 are also arranged above the heating element, and the upper powder heat-insulating layer is composed of a container arranged on the step at the upper end of the heating element and carbon black filled in the container; the lower powder heat-insulating layer 8 is composed of a container arranged below the heating element and carbon black filled in the container.
As shown in fig. 1, the heating element of the present embodiment is tubular, and a movable cover 8001 is provided between the lower powder heat-insulating layer 8 and the heating element. In the embodiment shown in fig. 3, the heating element is in a barrel shape, the lower end of the heating element is provided with an inner bottom, the lower powder heat-insulating layer 8 is not provided with an upper cover, and the bottom of the heating element directly covers the upper part of the container of the lower powder heat-insulating layer.
The temperature measuring tube 11 is arranged above the heating body 1, the temperature measuring tube penetrates through the upper heat insulation layer, and the bottom end of the temperature measuring tube extends into the hearth 50.
Example 2
As shown in fig. 2, 3 and 4, the vertical high-temperature induction heating furnace with the lengthened heating body comprises a heating body 1, a heat insulation layer, an inductor 3 and a furnace body 4 which are sequentially arranged from inside to outside, wherein the heating body 1 is cylindrical, the inductor 3 is arranged at the outer ring position of the heating body 1, the inductor 3 is composed of a heating coil 3001 and a pouring layer 3007, and the pouring layer 3007 is poured by adopting high-temperature-resistant insulating cement to wrap the heating coil 3001. A space is arranged between the inductor 3 and the heating body 1, an annular space surrounding the heating body 1 is formed, and carbon powder materials are filled in the annular space to form a sleeve type powder heat-insulating layer 2. A hearth 50 for placing materials is arranged at the position, corresponding to the height of a heating coil 3001 of the inductor 3, on the inner side of the heating body 1, a thin-wall sleeve 1002 is arranged above the hearth 50 or the heating body 1, and the wall thickness of the thin-wall sleeve 1002 is smaller than that of the heating body 1; an inner cover is arranged at the upper end of the hearth 50; an upper heat-insulating layer 9 is arranged above the hearth 50, and a lower heat-insulating layer 10 is arranged below the hearth. The upper end of the sleeve-type powder heat-insulating layer 2 is provided with an annular inner cover 2001, the diameter of the annular inner cover is slightly smaller than the width of the sleeve-type powder heat-insulating layer 2, so that the annular inner cover can lift along with the change of the volume of the powder material, the powder material is compacted, and the compactness and the heat-insulating property of the powder heat-insulating layer are ensured.
The heating element 1 is a high heating element, and as shown in FIG. 3, a step 1001 is provided on the inner wall of the heating element 1, and an inner lid is placed on the step 1001.
An outer step is arranged on the outer side of the upper end of the heating body, a thin-wall sleeve is arranged on the outer step, the thin-wall sleeve and the inner cover are arranged in parallel in the vertical direction, and the inner cover is arranged on the inner side face of the thin-wall sleeve. In other embodiments, a thin-walled sleeve is also provided over the inner cover.
The thin-wall sleeve wraps the insulating layer, namely a part of the upper insulating layer 9 wraps the inner side of the thin-wall sleeve 1002. As shown in FIG. 4, the upper insulating layer 9 is entirely wrapped inside the thin-wall sleeve.
As shown in fig. 2, the inductor 3 further has a lower cooling coil 3002 and an upper cooling coil 3003, which are respectively disposed above and below the induction coil 3001 and both of which are wrapped in the casting layer 3007. The pouring layer outside still is equipped with backup pad 3005 for strengthen the intensity of inductor. The inductor 3 top is equipped with ring end plate 3005, and the below is equipped with bottom brick 3004, is equipped with hole for hoist 30081 on the ring end plate 3005, is equipped with lifting nut 3006 on the bottom brick 3004 that corresponds with hole for hoist and mount furnace body. The outer side of the annular end plate 3005 is further provided with an annular cover plate 15, the annular cover plate 15 is provided with a correcting rod 14, and the correcting rod 14 is connected with the outer wall of the furnace body 4 and the inductor and used for adjusting the position relation between the inductor and the furnace body and keeping the coaxiality.
As shown in fig. 2, a bottom plate 6001 is disposed below the lower insulating layer 10, a bottom brick 12 is disposed between the bottom plate 6001 and the lower insulating layer 10, and an annular passage is disposed between the bottom brick 12 and the inductor 2 or the bottom brick 3004 below the inductor for discharging moisture and gas evaporated from the powder insulating layer. The furnace bottom 6 is provided with a furnace bottom cavity 6003 below the bottom plate 6001, the bottom plate 6001 is provided with a plurality of through holes 6002 communicated with the furnace bottom cavity 6003, and a seabed hole 6004 below the furnace bottom cavity 6003 for discharging the contained moisture and gas out of the furnace.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (13)

1. The utility model provides a high temperature induction heating furnace of extension heat-generating body, includes the stack, heat-generating body (1), heat preservation, inductor (3) that set gradually in the stack, its characterized in that: a hearth (50) for placing materials is arranged in the middle of the heating body (1), a heat-insulating layer (2) is arranged outside the hearth (50), and an inductor (3) is arranged outside the heat-insulating layer (2); the inductor (3) comprises a heating coil (3001) which is wound on the outer side of the heat-insulating layer (2) and corresponds to the height of the hearth (50); the heating body adopts the following structure to enable the upper end surface of the heating body to be higher than the upper end surface of a heating coil (3001) in the inductor (3):
a thin-wall sleeve (1002) is sleeved above the heating body;
secondly, the height of the heating body is increased, so that the increased height is consistent with the height of the heating body and the height of the thin-wall sleeve (1002).
2. The high-temperature induction heating furnace of the elongated heating body according to claim 1, characterized in that the heating body (1) is columnar, a thin-walled sleeve (1002) is superposed over the heating body (1), and the wall thickness of the thin-walled sleeve (1002) is smaller than that of the heating body (1).
3. A high-temperature induction heating furnace of an elongated heating body according to claim 1, characterized in that the wall thickness of the upper portion of the elongated heating body is smaller than the wall thickness of the middle and lower portions.
4. A high-temperature induction heating furnace of an elongated heating body according to claim 1, characterized in that said heating body (1) is formed by stacking a plurality of segment tubular bodies.
5. A high-temperature induction heating furnace with an elongated heating element according to claim 1, characterized in that an inner cover (7) is provided at the upper part of said heating element (1) for covering the furnace chamber.
6. A high-temperature induction heating furnace of an elongated heating element according to claim 2, characterized in that said heating element (1) is a short heating element, and an inner lid is placed on the top end of the heating element.
7. A high temperature induction heating furnace with an elongated heating element according to claim 2, wherein the heating element (1) is a high heating element, a step (1001) is provided on an inner wall of the heating element (1), and the inner lid is placed on the step (1001).
8. The high-temperature induction heating furnace of an elongated heating body according to claim 6 or 7, characterized in that the thin-walled sleeve is provided above the inner lid.
9. The high temperature induction heating furnace of an elongated heating body according to claim 6 or 7, characterized in that said inner lid is provided inside the thin walled sleeve.
10. A high-temperature induction heating furnace with an elongated heating body according to claim 1, characterized in that an outer step is provided on the outer side of the upper end of the heating body (1), and a thin-walled sleeve is provided on the outer step.
11. The high-temperature induction heating furnace with the lengthened heating body as recited in claim 1, characterized in that the heat-insulating layer is a solid heat-insulating layer and/or a powder heat-insulating layer, and the solid heat-insulating layer is a carbon felt or a graphite felt.
12. The high-temperature induction heating furnace with the lengthened heating element as recited in claim 11, wherein the powder heat-insulating layer (2) comprises a container arranged at the periphery of the heating element (1) and a carbonaceous powder heat-insulating material filled in the container.
13. The high-temperature induction heating furnace of an elongated heating body according to claim 1, characterized in that: the upper heat-insulating layer (9) is wholly or partially positioned on the inner side of the thin-wall sleeve (1002).
CN202110138271.3A 2020-12-25 2021-02-01 Vertical high-temperature induction heating furnace with lengthened heating body Pending CN114688872A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2020115675378 2020-12-25
CN202011567537 2020-12-25

Publications (1)

Publication Number Publication Date
CN114688872A true CN114688872A (en) 2022-07-01

Family

ID=82136466

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110138271.3A Pending CN114688872A (en) 2020-12-25 2021-02-01 Vertical high-temperature induction heating furnace with lengthened heating body

Country Status (1)

Country Link
CN (1) CN114688872A (en)

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