CN111721130A - Heat-resisting cushion block fixing structure for steel rolling heating furnace - Google Patents
Heat-resisting cushion block fixing structure for steel rolling heating furnace Download PDFInfo
- Publication number
- CN111721130A CN111721130A CN201911123908.0A CN201911123908A CN111721130A CN 111721130 A CN111721130 A CN 111721130A CN 201911123908 A CN201911123908 A CN 201911123908A CN 111721130 A CN111721130 A CN 111721130A
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- Prior art keywords
- heat
- cushion block
- fixing structure
- fixed
- block
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- F27D5/00—Supports, screens, or the like for the charge within the furnace
-
- 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
- F27D5/00—Supports, screens, or the like for the charge within the furnace
- F27D2005/0081—Details
Abstract
The invention relates to a heat-resisting cushion block fixing structure for a steel rolling heating furnace, which comprises: the horizontal supporting beam is internally provided with a cooling water channel; the base is provided with a radian matched with the horizontal supporting beam and is welded on the horizontal supporting beam along the length direction; the upper part of the fixed clamping block is provided with a clamping groove, and the bottom of the fixed clamping block is fixed with the base through welding; the lower part of the heat-resistant cushion block is embedded in the clamping groove of the fixed clamping block, and the heat-resistant cushion block and the fixed clamping block are fixed by welding; the heat insulating layer is arranged at the bottom of the clamping groove of the fixed clamping block. Because the components are connected by adopting the embedded structure, the integral fixing structure is convenient to install and maintain, and the manufacturing cost is reduced.
Description
Technical Field
The invention relates to a heat-resistant cushion block fixing structure for a steel rolling heating furnace, and belongs to the technical field of high-temperature alloys.
Background
The billet steel must be heated by a continuous steel rolling heating furnace before rolling, so that the billet steel is sequentially subjected to three processes of preheating, heating and soaking (isothermal). After the billet is fed into a furnace, the billet is placed on a cushion block of a horizontal supporting beam (water beam for short), water is introduced into the water beam for cooling, the cushion block fixed on the water beam transfers heat to the water beam, so that the temperature of the cushion block is lower than the furnace temperature, the temperature of the billet contacted with the cushion block is lower than that of other parts, the metallurgical industry refers to black mark, the black mark affects the physical property and the mechanical property of a rolled material, the black mark of the billet is lightened, the heating quality of the billet is very important, and the temperature difference of the black mark of the billet is required to be less than a certain range (generally required. FIG. 6 is a schematic view showing the positions of the spacers and the steel slab in the industrial furnace.
As can be seen from fig. 6: the cushion block is fixed on the water beam, the top of the cushion block is in contact with the steel billet, and the cushion block conducts heat (Q) to the water beam.
In the existing steel rolling industry, a cushion block of a heating furnace is in direct contact with a water beam, the cushion block is in a welding mode or a clamping block connection mode with the water beam, and the temperature of the cushion block is lower than the furnace temperature due to the fact that the cushion block conducts heat to the water beam quickly, so that the temperature of a steel billet in contact with the cushion block is lower than that of the peripheral part, a steel billet black mark is generated, and the steel rolling process requirement is difficult to meet (the temperature difference of the black mark of the.
Disclosure of Invention
The invention aims to overcome the defects and provide the fixing structure of the heat-resisting cushion block for the steel rolling heating furnace, which has a simple and stable structure, can be detached and can effectively eliminate the black mark of the billet.
The purpose of the invention is realized by the following technical scheme: a heat-resistant cushion block fixing structure for a steel rolling heating furnace, the fixing structure comprising: the horizontal supporting beam is internally provided with a cooling water channel; the base is provided with a radian matched with the horizontal supporting beam and is welded on the horizontal supporting beam along the length direction; the upper part of the fixed clamping block is provided with a clamping groove, and the bottom of the fixed clamping block is fixed with the base through welding; the lower part of the heat-resistant cushion block is embedded in the clamping groove of the fixed clamping block, and the heat-resistant cushion block and the fixed clamping block are fixed by welding; the heat insulating layer is arranged at the bottom of the clamping groove of the fixed clamping block.
In the invention, the heat-resistant cushion block is made of chromium-based alloy containing more than or equal to 80 wt% of chromium.
The fixed fixture block and the base are made of Cr25Ni 20.
The heat insulation layer is an alumina or zirconia ceramic gasket, wherein the thickness of the ceramic gasket is 100-150 micrometers.
The heat-resisting cushion block fixing structure of the invention has the advantages that the heat-resisting cushion block, the base and the heat insulation layer between the heat-resisting cushion block and the base are of separate structures, so that the replacement of each part in the heat-resisting cushion block fixing structure is convenient. The lower part of the heat-resistant cushion block is made into a rectangular key, the fixed fixture block is made into a rectangular groove, a fixed structure which is mutually embedded with the rectangular key at the lower part of the heat-resistant cushion block is formed, and the heat-resistant cushion block and the fixed fixture block are easy to be welded and jointed.
Compared with the prior art, the invention has the following advantages:
the invention has simple structure, and because the ceramic heat-insulating layer is arranged between the heat-resisting cushion block and the base, the heat conduction from the heat-resisting cushion block to the horizontal supporting beam is reduced, the temperature difference between the steel billet at the contact part of the heat-resisting cushion block and the steel billet at other parts is greatly reduced, the black mark phenomenon of the steel billet is reduced, the heating quality of the steel billet is improved, and the steel rolling process requirement is met.
In the heat-resistant cushion block fixing structure, the heat-resistant cushion block can select a material with low heat conductivity coefficient as a working part (for example, Cr of high-chromium alloy is more than or equal to 80 wt%), which is more favorable for eliminating the black mark phenomenon of the billet and improving the heating quality of the billet.
According to the heat-resistant cushion block fixing structure provided by the invention, the components are connected by adopting the embedded structure, so that the whole fixing structure is convenient to mount and maintain, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a front view of a heat resistant spacer fixing structure according to the present invention;
FIG. 2 is an exploded view of the heat resistant spacer fixing structure of the present invention;
FIGS. 3, 4 and 5 are schematic views illustrating the assembly of the fixing structure of the heat resistant spacer according to the present invention;
FIG. 6 is a schematic view of the positions of a spacer and a billet in an industrial furnace;
reference numbers in the figures: 1-heat-resistant cushion block, 2-base, 3-heat-insulating layer, 4-fixed fixture block and 5-horizontal supporting beam
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
The invention discloses an embodiment of a heat-resisting cushion block fixing structure for a steel rolling heating furnace, which is structurally shown in figures 1 and 2.
The invention relates to a heat-resisting cushion block fixing structure for a steel rolling heating furnace, which comprises: a horizontal support beam 5, wherein a cooling water channel is arranged inside the horizontal support beam; the base 2 has a radian matched with the horizontal support beam and is welded on the horizontal support beam along the length direction of the horizontal support beam; the upper part of the fixed clamping block is provided with a clamping groove, and the bottom of the fixed clamping block is fixed with the base through welding; the lower part of the heat-resistant cushion block is embedded in the clamping groove of the fixed clamping block, and the heat-resistant cushion block and the fixed clamping block are fixed by welding; and the heat insulation layer 3 is arranged at the bottom of the clamping groove of the fixed clamping block and used for reducing heat conduction of the heat-resistant cushion block to the horizontal supporting beam.
The cooling water circulating in the cooling water channel cools the integral fixed structure to avoid overheating of the integral structure, thereby prolonging the service life of the heat-resisting cushion block.
The radian of the base is circular and matched with the outer diameter of the horizontal supporting beam, so that the base is conveniently welded on the surface of the horizontal supporting beam.
The feasible technical scheme of the invention is that the heat-resistant cushion block is made of chromium-based alloy containing more than or equal to 80 wt% of chromium.
In another possible technical scheme, the fixing fixture block and the base are made of Cr25Ni 20.
Another possible technical solution is that the heat insulating layer is an alumina or zirconia ceramic gasket.
The other feasible technical scheme is that the thickness of the ceramic gasket is 100-150 micrometers.
Still another feasible technical scheme is that the clamping groove for fixing the clamping block is rectangular.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be understood by those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A heat-resistant cushion block fixing structure for a steel rolling heating furnace, the fixing structure comprising: a horizontal support beam (5) in which a cooling water passage is provided; the base (2) is provided with a radian matched with the horizontal supporting beam and is welded on the horizontal supporting beam along the length direction of the horizontal supporting beam; the upper part of the fixed clamping block is provided with a clamping groove, and the bottom of the fixed clamping block is fixed with the base through welding; the lower part of the heat-resistant cushion block is embedded in the clamping groove of the fixed clamping block, and the heat-resistant cushion block and the fixed clamping block are fixed by welding; and the heat insulation layer (3) is arranged at the bottom of the clamping groove of the fixed clamping block.
2. The fixing structure according to claim 1, wherein: the heat-resistant cushion block of the cushion is made of chromium-based alloy containing more than or equal to 80 wt% of chromium.
3. The fixing structure according to claim 1, wherein: the fixed fixture block and the base are made of Cr25Ni20 steel.
4. The fixing structure according to claim 1, wherein: the heat insulation layer is an alumina or zirconia ceramic gasket.
5. The fixing structure according to claim 1, wherein: the clamping groove of the fixed clamping block is rectangular.
6. The fixing structure according to claim 4, wherein: the thickness of the ceramic gasket is 100-150 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123908.0A CN111721130A (en) | 2019-11-15 | 2019-11-15 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123908.0A CN111721130A (en) | 2019-11-15 | 2019-11-15 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111721130A true CN111721130A (en) | 2020-09-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911123908.0A Pending CN111721130A (en) | 2019-11-15 | 2019-11-15 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
Country Status (1)
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| CN (1) | CN111721130A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6123711A (en) * | 1984-07-11 | 1986-02-01 | Daido Steel Co Ltd | Skid button for heating furnace |
| CN1212357A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| CN1212358A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| WO2005116276A1 (en) * | 2004-05-24 | 2005-12-08 | Dongping Zhang | A metallurgical heating furnace |
| CN101928822A (en) * | 2010-08-06 | 2010-12-29 | 中冶京诚工程技术有限公司 | Cushion block for heating furnace |
| CN103103337A (en) * | 2013-02-21 | 2013-05-15 | 武汉钢铁(集团)公司 | Method for decreasing walking beam heating furnace steel billet water beam black mark |
| CN103725865A (en) * | 2013-12-23 | 2014-04-16 | 叶希 | Steel rolling heating furnace slide block and production method thereof |
| CN206204381U (en) * | 2016-10-27 | 2017-05-31 | 烟台开发区蓝鲸金属修复有限公司 | A kind of steel ceramic combination CSP hearth rolls |
-
2019
- 2019-11-15 CN CN201911123908.0A patent/CN111721130A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6123711A (en) * | 1984-07-11 | 1986-02-01 | Daido Steel Co Ltd | Skid button for heating furnace |
| CN1212357A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| CN1212358A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| WO2005116276A1 (en) * | 2004-05-24 | 2005-12-08 | Dongping Zhang | A metallurgical heating furnace |
| CN101928822A (en) * | 2010-08-06 | 2010-12-29 | 中冶京诚工程技术有限公司 | Cushion block for heating furnace |
| CN103103337A (en) * | 2013-02-21 | 2013-05-15 | 武汉钢铁(集团)公司 | Method for decreasing walking beam heating furnace steel billet water beam black mark |
| CN103725865A (en) * | 2013-12-23 | 2014-04-16 | 叶希 | Steel rolling heating furnace slide block and production method thereof |
| CN206204381U (en) * | 2016-10-27 | 2017-05-31 | 烟台开发区蓝鲸金属修复有限公司 | A kind of steel ceramic combination CSP hearth rolls |
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Application publication date: 20200929 |
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