CN111378819A - Protection device for electromagnetic induction heat compensator - Google Patents
Protection device for electromagnetic induction heat compensator Download PDFInfo
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- CN111378819A CN111378819A CN202010311740.2A CN202010311740A CN111378819A CN 111378819 A CN111378819 A CN 111378819A CN 202010311740 A CN202010311740 A CN 202010311740A CN 111378819 A CN111378819 A CN 111378819A
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- protection device
- ceramic sleeve
- groove
- cooling pipeline
- electromagnetic induction
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
The invention provides a protection device for an electromagnetic induction heat compensator, which comprises a ceramic sleeve sleeved outside a billet channel, wherein a cooling pipeline is arranged on the ceramic sleeve, a cooling medium is introduced into the cooling pipeline, and a heat insulation layer and an insulation layer are sequentially wrapped outside the ceramic sleeve; and the induction coil of the electromagnetic induction heat compensator is arranged on the outer side of the insulating layer. The protection device provided by the invention can effectively protect the electromagnetic induction heat compensator, can prevent high-temperature radiation and metal oxide skin from coming from a rolled steel wire, and can prolong the service life of the electromagnetic induction heat compensator.
Description
Technical Field
The invention relates to the field of steel rolling line production, in particular to a protection device of an electromagnetic induction heat compensator for carrying out induction heat compensation on high-temperature steel billets on a steel rolling line.
Background
The induction concurrent heating technology is widely applied to a steel rolling line, plays a very important role in a steel rolling process, and has the following main advantages:
(1) energy is saved and the quality of the steel billet is improved. In the steel rolling process, the induction heat compensation is carried out on the axial temperature head-tail temperature difference and the longitudinal cross section temperature core surface temperature difference of the steel billet, so that the overall temperature distribution of the steel billet is uniform, and a reliable temperature basis is provided for the subsequent rolling process.
(2) Reduce metal loss and improve the yield of the billet. In the induction heat-supplementing process, the heat-supplementing time is shorter than that of the traditional method, the surface oxidation degree of the billet is low, and the yield of the billet is improved.
(3) The production process time is reduced. The induction heat-supplementing technology greatly shortens the heat-supplementing time and correspondingly shortens the production process period.
(4) The induction heat supplementing parameters can be controlled. For steel billets with different sizes, parameters of the electromagnetic induction heat compensator can be adjusted, induction heat compensation of the steel billets can be rapidly carried out, and the temperature requirement can be met.
The electromagnetic induction heat compensator comprises an induction coil, and the induction coil is electrified to heat the steel billet. The electromagnetic induction heat compensator can be installed in any place of a rolling mill needing temperature rise due to small occupied space, steel billets on the rolling mill pass through an inner cavity of the induction heat compensator, alternating magnetic lines of force emitted by a moving steel billet cutting induction heat compensator coil generate induction eddy currents, the surface temperature of the steel billets is quickly raised due to the effect of skin effect, heat is conducted to a core, and the heat compensation temperature rise process of the whole steel billets is completed. The temperature of the steel billet entering the electromagnetic inductor is generally between 800 and 900 ℃, and the temperature of the steel billet after temperature compensation can reach 1100 to 1200 ℃. At present, the inner cavity of the electromagnetic induction heat compensator is protected by adopting refractory materials, after the working time of steel rolling is long, radiant heat generated by high-temperature steel billets can gradually penetrate through the refractory materials and is led into the outer surface of an induction coil inside the electromagnetic induction heat compensator, the temperature of the induction coil is overhigh, burning loss is caused, and the heating efficiency of the induction coil is reduced due to overhigh temperature. Meanwhile, a large amount of oxide scale is burnt on the surface of the high-temperature billet at 800 ℃, the burning loss is increased when the temperature is higher, cracks are easy to appear on the refractory material in the inner cavity of the electromagnetic induction heat compensator due to continuous change of the temperature, and when the burnt metal oxide scale enters the electromagnetic induction heat compensator through the cracks of the refractory material, turn-to-turn short circuit burning of the induction coil is easy to cause. The above situation is the main reason that the existing super electromagnetic induction heat compensator is easy to damage.
Disclosure of Invention
The invention aims to solve the problems that high-temperature steel billets in the prior art generate high-temperature radiation and metal oxide skins are easy to damage an electromagnetic induction heat compensator, and provides a protection device for the electromagnetic induction heat compensator.
In order to solve the technical problems, the invention adopts the technical scheme that: a protection device for an electromagnetic induction heat compensator comprises a ceramic sleeve sleeved outside a billet channel, wherein a cooling pipeline is arranged on the ceramic sleeve, a cooling medium is introduced into the cooling pipeline, and a heat insulation layer and an insulation layer are sequentially wrapped outside the ceramic sleeve;
and an induction coil of the electromagnetic induction heat compensator is arranged on the outer side of the insulating layer.
Through setting up ceramic sleeve for protection device has higher intensity and heat resistance, is difficult for the fracture under the high temperature environment, can effectively prevent metal oxide skin to get into the electromagnetic induction concurrent heating ware. By arranging the cooling pipe, heat transferred from the steel billet to the ceramic sleeve can be taken away. Through setting up the insulating layer, can effectively reduce the heat that high temperature steel billet sees through protection device and transmits to induction coil. By arranging the insulating layer, metal oxide skin can be further prevented from entering the electromagnetic induction heat compensator. The electromagnetic induction heat compensator is arranged outside the insulating layer, namely, the induction coil of the electromagnetic induction heat compensator is arranged outside the insulating layer.
Furthermore, a groove is formed in the outer wall of the ceramic sleeve, and the cooling pipeline is installed in the groove.
Further, the groove body integrally forms a single groove channel and is arranged around the periphery of the ceramic sleeve, and a groove channel inlet and a groove channel outlet of the single groove channel are respectively positioned on two end faces of the ceramic sleeve; the shape of the cooling pipeline is matched with the overall shape of the groove.
By only arranging the single groove channel, most of the radiant heat from the high-temperature steel billet on the protection device can be guided away by only adopting one cooling pipe way, so that water resources are saved.
Furthermore, the groove comprises K extending parts arranged along the direction of the billet channel and K-1 connecting parts used for communicating the adjacent extending parts, and K is more than or equal to 3.
The extending part is arranged along the direction of the billet passage, so that heat at each position in the direction of the billet passage can be conducted away.
Further, refractory mortar with the granularity of less than 0.5mm is filled between the groove and the cooling pipeline installed in the groove.
Further, the wall thickness of the ceramic sleeve is not more than 30mm and not less than 15mm, the outer diameter of the cooling pipeline is not more than 10mm, the thickness of the heat insulation layer is not more than 10mm, and the thickness of the insulation layer is not more than 2 mm.
Further, the ceramic sleeve is made of sintered ceramic materials.
Further, the cooling pipeline is made of heat-resistant austenitic stainless steel, the thickness of the pipe wall of the cooling pipeline is not more than 1mm, and the inner diameter of the cooling pipeline is not more than 8 mm.
Furthermore, the heat insulation layer is made of an aluminum silicate refractory fiber material.
Further, the insulating layer adopts phlogopite.
Compared with the prior art, the invention has the beneficial effects that: the electromagnetic induction hot-water supplier is protected by active cooling and protection of a protection device instead of the traditional refractory material. The ceramic sleeve of the protection device has high strength and thermal shock resistance, is not easy to crack under the high-temperature environment of steel rolling, and can effectively prevent metal oxide skin from entering the electromagnetic induction heat compensator. A cooling pipeline is embedded in the ceramic sleeve, and most of radiation heat from the high-temperature steel billet on the protection device is guided away through a circulating cooling medium in the cooling pipeline. The outer side of the ceramic sleeve is wrapped with a heat insulation layer which can effectively prevent the radiant heat of the high-temperature billet from rapidly penetrating through the protection device to the induction coil in the electromagnetic induction heat compensator, so that the radiant heat is mainly concentrated between the ceramic sleeve and the heat insulation layer, and the radiant heat is guided away by a circulating cooling medium. The outermost side of the protection device is an insulating layer and is arranged on the inner side of the induction coil, so that the penetration of metal oxide skin can be effectively prevented, and the induction coil can be better protected. The protection device can completely replace the protection of refractory materials, and greatly prolongs the service life of the electromagnetic induction heat compensator by more than one time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic diagram illustrating a positional relationship between a protection device for an electromagnetic induction concurrent heater and a billet and an induction coil of the electromagnetic induction concurrent heater according to an embodiment of the present invention;
FIG. 2 is a schematic three-dimensional structure of the protector for the electromagnetic induction heat compensator shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
FIG. 4 is a schematic three-dimensional structure of the ceramic sleeve of FIG. 2;
FIG. 5 is a schematic view of a portion of the ceramic sleeve of FIG. 4 after it has been expanded to a flat configuration;
FIG. 6 is a cross-sectional view of the ceramic sleeve of FIG. 4;
FIG. 7 is a schematic three-dimensional structure of the cooling duct of FIG. 2;
fig. 8 is a graph comparing the temperature of the outer surface of the induction coil under the protection of the protection device for the electromagnetic induction heat compensator according to the embodiment of the present invention with the temperature of the outer surface of the induction coil under the protection of the conventional refractory.
In the above figure, 1-protective device, 11-ceramic sleeve, 13-cooling pipe, 131-pipe joint, 14-thermal insulation layer, 15-insulation layer, 2-induction coil, 3-electromagnetic induction heat compensator shell, 4-steel billet, 5-rolling mill roller, 12-groove, 12A-groove channel inlet, 12B-groove channel outlet, 121-extension part, 122-connecting part.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 7, the protection device 1 for an electromagnetic induction heat compensator according to the present embodiment includes a ceramic sleeve 11, a pipe joint 131, a cooling pipe 13, a heat insulating layer 14, and an insulating layer 15.
In fig. 1, the electromagnetic induction hot metal make-up housing 3 is used to support and fix the ceramic sleeve 11. The coil 2 is fitted over the protective assembly 1 and disposed on the insulating layer 15.
The protection device for the electromagnetic induction heat compensator comprises a ceramic sleeve 11, a cooling pipeline 13 embedded in the ceramic sleeve 11, a cooling medium filled in the cooling pipeline 13, a heat insulation layer 14 and an insulation layer 15, wherein the heat insulation layer 14 is wrapped outside the ceramic sleeve 11, and the insulation layer 15 is wrapped on the heat insulation layer 14. And an induction coil 2 of the electromagnetic induction heat compensator is arranged outside the insulating layer 15.
The groove 12 integrally forms a single groove channel, the groove 12 is integrally arranged around the periphery of the ceramic sleeve 11, and a groove channel inlet 12A and a groove channel outlet 12B of the single groove channel are respectively positioned on two end faces of the ceramic sleeve 11; the cooling duct 13 is shaped to conform to the overall shape of the groove 12.
The groove 12 includes K extensions 121 arranged along the direction of the billet passage and K-1 connecting portions 122 for connecting adjacent extensions 121. Preferably, K.gtoreq.3. The maximum value of K may be determined according to the size of the ceramic sleeve 11.
In a preferred embodiment, the ceramic sleeve 11 is made of an alumina or silicon carbide ceramic material by high temperature sintering. The working temperature is more than 1400 ℃, the thermal shock resistance is high, the normal temperature compressive strength is more than or equal to 140MPa, the thermal expansion coefficient is small, the cracking is not easy to occur, and the structural strength is good. In order to protect the billet from passing through safely, the inner diameter of the ceramic sleeve 11 cannot be too small, and the outer diameter of the ceramic sleeve 11 cannot be too large, so that the distance between the billet and the inductor coil is increased, and the heating efficiency is reduced. In practical tests, under the same cooling conditions (i.e. no cooling water is introduced into the cooling pipe 13 on the ceramic sleeve 11), when the thickness of the pipe wall of the ceramic sleeve 11 is 20mm through a billet with the temperature of 1000 ℃, the temperature outside the ceramic sleeve is reduced to 700 ℃. When the wall thickness of the ceramic sleeve 11 is 40mm, the temperature outside the ceramic sleeve 11 is reduced to 500 ℃. However, when the wall thickness of the ceramic sleeve 11 is increased from 30mm to 40mm, the temperature outside the ceramic sleeve 11 is only reduced by 30 ℃, and the change of the heat insulation effect is not obvious. In order to avoid affecting the heat compensation efficiency of the electromagnetic induction heat compensator, the wall thickness of the ceramic sleeve 11 is generally less than 30 mm. In addition, the ceramic sleeve 11 is provided with a wall thickness of not less than 15mm, considering that if the wall thickness is too small, the hardness is affected and the ceramic sleeve is easily broken.
In a preferred embodiment, the cooling pipeline 13 is made of austenitic heat-resistant stainless steel 0Cr25Ni20 steel pipe, in order to reduce induced current generated in the steel pipe when the inductor works, the thickness of the pipe wall of the steel pipe of the cooling pipeline 13 is generally less than or equal to 1mm, and the inner diameter of the steel pipe is less than or equal to Ø 8 mm.
In a preferred embodiment, the cooling medium is circulating cooling water with the temperature of less than or equal to 40 ℃.
In a preferred embodiment, the insulating layer 14 has a low thermal conductivity and is made of an alumina silicate refractory fiber felt. The working temperature is higher than 1400 ℃, the thermal conductivity is less than or equal to 0.03w/m.k, the thermal stability is excellent, and meanwhile, in order to avoid influencing the heat compensation efficiency of the electromagnetic induction heat compensator, the thickness of the heat insulation layer 14 is less than or equal to 10 mm.
In a preferred embodiment, the insulating layer 15 is made of high temperature resistant soft phlogopite. The high-temperature-resistant insulating material has excellent high-temperature-resistant insulating performance, the highest temperature resistance reaches 1000 ℃, and the voltage breakdown resistance index is more than or equal to 20 KV/mm. Has good flexibility, can be bent at will without cracking, and the thickness of the insulating layer 15 is less than or equal to 2 mm.
The protection device 1, the inductor coil 2 and the inductor shell 3 form an electromagnetic induction heat compensator, and the protection device 1 forms an inner cavity of the electromagnetic induction heat compensator and is positioned on the inner side of the electromagnetic induction coil 2. The high-temperature billet 4 on the rolled steel wire is driven by a rolling mill roller 5 to carry out induction heat compensation in an electromagnetic induction heat compensator. After the high-temperature billet 4 with the surface temperature of 900 ℃ enters the heat compensator, the high-temperature heat on the surface is radiated to the ceramic sleeve 11 at the innermost side of the protection device 1, along with the increase of the working time, the temperature on the ceramic sleeve 11 is gradually increased and is conducted to the inside of the induction heat compensator, namely, the high-temperature billet is conducted to the direction of the inductor coil 2 in the induction heat compensator, and at the moment, the circulating cooling water in the cooling pipeline 13 absorbs the heat on the ceramic sleeve 11. Circulating water with the temperature of less than 40 ℃ is input from an external system through a pipeline joint 131, the other end discharges the circulating water with the increased temperature to an external cooling system for secondary cooling of the circulating water, and the cooled circulating water has the temperature of less than 40 ℃ and is sequentially and circularly cooled. The flow of the circulating cooling water can be 1-3 m3The pressure can be 0.2 to 0.4 MPa. The thermal insulation layer 14 is a fiber felt and can be wrapped on the outer surface of the ceramic sleeve 11 in the shape of the ceramic sleeve, and due to the low thermal conductivity of the thermal insulation layer 14, the rapid conduction of the radiant heat conducted from the ceramic sleeve 11 to the inside of the electromagnetic inductor is further inhibited. The insulating layer 15 is finally wrapped on the heat insulating layer 14, and then the polyester imide adhesive tape is used for winding and fixing after wrapping. The insulating layer 15 has high mechanical strength, is not easy to break after being bent, can prevent fine oxide skin on the high-temperature billet from permeating into the induction heat compensator through the protection device 11, and effectively protects the insulating property of the induction coil.
As shown in fig. 4 to 6, the ceramic sleeve 11 is a base body of the protection device, is disposed at the innermost side of the protection device, and has an inner diameter 60mm larger than the maximum diagonal line of the high temperature billet in order to allow the high temperature billet to pass smoothly. The ceramic sleeve is provided with a single annular groove on the surface thereof for embedding the cooling pipe 13. The depth h and the width w of the groove are 0.5mm larger than the 13-dimension outer diameter of the cooling pipeline, so that good contact is facilitated. The distance d between the grooves of the grooves is selected from 20-200 mm according to the different inner diameters of the ceramic sleeves. The cooling pipe 13 may be a cooling water pipe.
As shown in fig. 7, the cooling pipe 13 is a single pipe and is embedded in the shape of a groove of the ceramic sleeve 11. After embedding, refractory mortar with the granularity of less than 0.5mm is used for filling a gap between the groove 12 and the cooling pipeline 13, so that the ceramic sleeve 11 and the cooling pipeline 13 are well bonded. The cooling pipeline 13 is welded with pipeline joints 131 at the head and the tail, and the pipeline joints 131 can be connected with an external cooling water system.
According to the invention, the ceramic sleeve can adopt a sintered ceramic sleeve, has high strength and thermal shock resistance, is not easy to crack under a steel rolling high-temperature environment, and can effectively prevent metal oxide skin from entering the electromagnetic induction heat compensator. A cooling pipeline is embedded in the ceramic sleeve, and most of radiation heat from the high-temperature steel billet on the protection device is guided away through a circulating cooling medium in the cooling pipeline. The outer side of the ceramic sleeve is wrapped with a heat insulation layer which is made of a material with low heat conductivity coefficient, so that the radiation heat of the high-temperature billet can be effectively prevented from rapidly penetrating through the protection device to the induction coil in the electromagnetic induction heat compensator, the radiation heat is mainly concentrated between the ceramic sleeve and the heat insulation layer, and the radiation heat is conducted away by circulating cooling water. The outermost side of the protection device is an insulating layer and is arranged on the inner side of the induction coil, so that the penetration of metal oxide skin can be effectively prevented, and the induction coil can be better protected. The protection device can completely replace the protection of refractory materials, and greatly prolongs the service life of the electromagnetic induction heat compensator by more than one time.
As shown in fig. 8, the temperature of the outer surface of the induction coil was compared between the case of the protection of the refractory and the case of the protection device in the case of the radiant heat environment of 900 ℃. The temperature close to the outer surface of the electromagnetic induction coil is about 400 ℃ when the traditional refractory material is protected, and the temperature close to the outer surface of the electromagnetic induction coil is below 100 ℃ when the protective device is protected.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent. After reading this disclosure, modifications of various equivalent forms of the present invention by those skilled in the art will fall within the scope of the present application, as defined in the appended claims. The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Claims (10)
1. The utility model provides an electromagnetic induction is protection device for concurrent heating which characterized in that: the cooling device comprises a ceramic sleeve (11) sleeved outside a billet channel, wherein a cooling pipeline (13) is arranged on the ceramic sleeve (11), a cooling medium is introduced into the cooling pipeline (13), and a heat insulation layer (14) and an insulation layer (15) are sequentially wrapped outside the ceramic sleeve (11);
and an induction coil (2) of the electromagnetic induction heat compensator is arranged on the outer side of the insulating layer (15).
2. The protection device of claim 1, wherein: the ceramic sleeve (11) is provided with a groove (12) on the outer wall, and the cooling pipeline (13) is arranged in the groove (12).
3. The protection device according to claim 2, the groove (12) being integrally formed as a single groove channel having a groove channel inlet (12A), a groove channel outlet (12B) respectively located at both end faces of the ceramic sleeve (11) and arranged around the periphery of the ceramic sleeve (11); the shape of the cooling pipeline (13) is matched with the overall shape of the groove (12).
4. The protection device according to claim 3, wherein the groove (12) comprises K extensions (121) arranged along the direction of the billet passage and K-1 connecting portions (122) for connecting adjacent extensions (121), K ≧ 3.
5. The protection device of claim 2, wherein: refractory mortar with the granularity of less than 0.5mm is filled between the groove (12) and the cooling pipeline (13) arranged in the groove (12).
6. The protection device of claim 1, wherein: the wall thickness of the ceramic sleeve (11) is not more than 30mm and not less than 15mm, the outer diameter of the cooling pipeline (13) is not more than 10mm, the thickness of the heat insulation layer (14) is not more than 10mm, and the thickness of the insulation layer (15) is not more than 2 mm.
7. The protection device according to any one of claims 1-6, wherein: the ceramic sleeve (11) is made of sintered ceramic material.
8. The protection device according to any one of claims 1-6, wherein: the cooling pipeline (13) is made of heat-resistant austenitic stainless steel, the thickness of the pipe wall of the cooling pipeline (13) is not more than 1mm, and the inner diameter of the cooling pipeline (13) is not more than 8 mm.
9. The protection device according to any one of claims 1-6, wherein: the heat insulation layer (14) is made of an aluminum silicate refractory fiber material.
10. The protection device according to any one of claims 1-6, wherein: the insulating layer (15) adopts phlogopite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010311740.2A CN111378819A (en) | 2020-04-20 | 2020-04-20 | Protection device for electromagnetic induction heat compensator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010311740.2A CN111378819A (en) | 2020-04-20 | 2020-04-20 | Protection device for electromagnetic induction heat compensator |
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| CN111378819A true CN111378819A (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708742A (en) * | 2020-12-07 | 2021-04-27 | 江苏省镔鑫钢铁集团有限公司 | Continuous induction heat treatment process and treatment device for high-strength finish-rolled twisted steel |
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2020
- 2020-04-20 CN CN202010311740.2A patent/CN111378819A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708742A (en) * | 2020-12-07 | 2021-04-27 | 江苏省镔鑫钢铁集团有限公司 | Continuous induction heat treatment process and treatment device for high-strength finish-rolled twisted steel |
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