CN218395849U - Cast iron mould with gap interlayer - Google Patents
Cast iron mould with gap interlayer Download PDFInfo
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- CN218395849U CN218395849U CN202121967842.6U CN202121967842U CN218395849U CN 218395849 U CN218395849 U CN 218395849U CN 202121967842 U CN202121967842 U CN 202121967842U CN 218395849 U CN218395849 U CN 218395849U
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Abstract
A cast iron mould with a gap interlayer comprises a bottom layer, a working layer, and a gap layer arranged between the bottom layer and the working layer, wherein the bottom layer is welded and connected with the bottom of the working layer through-nails, supporting blocks are arranged at the peripheral edge of the cast iron mould and are welded and supported by the supporting blocks, the through-nails penetrate through the bottom layer and the working layer in a welding mode, and the two ends of each through-nail are welded through plug welds. The thickness of the working layer is half of that of the bottom layer, and the two ends of the through nail are welded by plug welds. The gap layer is arranged between the working layer and the bottom layer, a large amount of cooling water sprayed onto the iron blocks can enter the gap layer between the working layer and the bottom layer during cast iron production, and meanwhile, the working layer and the bottom layer are cooled, so that the thermal load of the working layer and the bottom layer is reduced, the thermal fatigue life of the cast iron mold is prolonged, and the replacement frequency of the cast iron mold is reduced.
Description
Technical Field
The utility model relates to a wearing part of a blast furnace iron-making auxiliary device, in particular to a casting mold with a gap interlayer for a casting machine.
Background
The iron casting machine is an essential auxiliary device for iron and steel enterprises, and has the function of continuously casting molten iron produced by a blast furnace or non-blast furnace iron-making process into iron blocks, so that the problem that the molten iron produced by an iron-making blast furnace is continuously cast into the iron blocks in time when a steel-making system has an unexpected fault is mainly solved, the continuous normal operation of the iron-making blast furnace is ensured, and meanwhile, the problems of safety in the remote transportation of the molten iron of the blast furnace and a large amount of electricity consumption caused by the cooling of the molten iron can be effectively solved. Belongs to molten iron continuous casting equipment necessary for domestic and foreign iron and steel enterprises.
The cast iron mold accounts for about 35% of the weight of the whole iron casting machine and is a key wearing part of the iron casting machine. The cast iron mold is fixed on the transmission chain belt, high-temperature molten iron at about 1400 ℃ flows into the cast iron mold of the pig machine through a molten iron runner, the molten iron in the cast iron mold is cooled by the spray water cooling area along with the movement of the chain belt to cast iron blocks, the temperature is about 550 ℃ when the iron blocks are separated from the cast iron mold, and the temperature is reduced to about 250 ℃ when the cast iron mold returns to the casting point again. Therefore, the cast iron die is under alternating thermal load for a long time under the working condition, the working condition is very poor, thermal fatigue cracks or fractures are easy to occur, the machine is stopped and replaced frequently, and the comprehensive production capacity of the iron casting machine is influenced. The structural design of the cast iron mould is optimized to different degrees in domestic same industries, the materials are continuously explored and tried, gray cast iron, nodular cast iron, heat-resistant cast iron, low-carbon cast steel and the like are tested, refractory materials are compounded in the inner cavity of the cast iron mould, and heat-resistant steel is added to the working layer. For this reason, it is very urgent and necessary to develop a cast iron mold with a longer life.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned cast iron mould thermal fatigue crack or cracked technical problem easily appear in the use, the utility model provides a take interbedded pig machine cast iron mould in space.
The technical scheme of the utility model is that:
the cast iron mould comprises a bottom working layer and a bottom layer, wherein a gap layer is arranged between the working layer and the bottom layer, and the working layer and the bottom layer are connected through-nails and supporting blocks in a welding mode. The working layer is made of heat-resistant steel for contacting high-temperature molten iron, and the bottom layer is made of cast carbon steel for general engineering. The drift bolt and the supporting block adopt chromium-nickel austenite anti-oxidation steel. The two ends of the through nail and the supporting block are respectively connected with the working layer and the bottom layer in a welding way.
A cast iron mould with a gap interlayer comprises a bottom layer and a working layer, wherein a gap layer is arranged between the bottom layer and the working layer, and a fixed support is arranged between the bottom layer and the working layer for connection.
The bottom between the bottom layer and the working layer is fixedly connected through-nail welding.
The bottom layer and the periphery of the upper edge of the working layer are fixedly connected through supporting blocks in a welding mode.
The through-nail welding is that the nail penetrates through the bottom layer and the working layer, and the two ends of the through-nail are welded by plug welds.
The thickness of the working layer is half of that of the bottom layer.
The material of the bottom layer adopts ZG230-450 carbon steel.
The working layer is made of chromium-nickel austenite oxidation resistant steel or low-carbon low-alloy heat-resistant steel.
The bottom layer and the working layer are made of chromium-nickel austenite oxidation resistant steel.
The plug weld is made of chromium-nickel austenite anti-oxidation steel.
Compared with the prior art, the gap layer is arranged between the working layer and the bottom layer, a large amount of cooling water sprayed on the iron blocks can enter the gap layer between the working layer and the bottom layer during cast iron production, the working layer and the bottom layer are cooled simultaneously, and the heat load of the working layer and the bottom layer is reduced, so that the thermal fatigue life of the cast iron die is prolonged, the replacement frequency of the cast iron die is reduced, the service life of the cast iron die is prolonged by more than 3.5 times, the shutdown maintenance time of the cast iron machine is correspondingly reduced, the labor hour is saved, the comprehensive production capacity of the cast iron machine is obviously improved, the equipment operation cost of a user is greatly reduced, and the economic benefit is obvious.
Drawings
Fig. 1 is a schematic sectional view of the front view of the present invention.
Fig. 2 is a plan view of the present invention.
Fig. 3 is a left side view schematic sectional structure of the present invention.
Fig. 4 is a partially enlarged schematic view a of plug weld welding according to the present invention.
Fig. 5 is a partially enlarged schematic view b of plug weld according to the present invention.
Wherein: 1. bottom layer, 2, working layer, 3, clearance layer, 4, supporting block, 5, through nail, 6, plug weld.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings. Based on the embodiments of the present invention, other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Therefore, the following detailed description of the embodiments of the present invention, which is provided in the accompanying drawings, is not intended to limit the scope of the invention, which is claimed, but merely represents selected embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without making creative work based on the embodiments of the present invention belong to the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
As shown in fig. 1-3, the gap-sandwiched cast iron mold for the pig machine comprises a bottom layer 1 and a working layer 2, wherein a gap layer 3 is arranged between the bottom layer 1 and the working layer 2, the bottom layer 1 is arranged at the lower layer of the gap layer 3, the working layer 2 is arranged at the upper layer of the gap layer, and the upper part of the working layer 2 is used for storing molten iron which needs to be cooled into iron blocks.
The bottom layer 1 and the working layer 2 are connected through the through-nails 5 and the supporting blocks 4 in a welding mode, welding materials are made of chromium-nickel austenite oxidation-resistant steel, the supporting blocks 4 are located on the periphery of the upper edges of the bottom layer 1 and the working layer 2, the through-nails 5 are located at the bottom, and two ends of the through-nails 5 are welded through plug welding lines 6.
As shown in fig. 4 and fig. 5, plug weld schematic diagrams, the positions of the bottom layer 1 and the working layer 2 for assembling the through-pins 5 are through holes, the upper end surfaces of the through-pins 5 are flush with the upper contour surface of the working layer 2, the lower end surfaces of the through-pins 5 are flush with the lower contour surface of the bottom layer 1, welding grooves are processed on the upper openings of the through holes of the working layer 2, welding grooves are processed on the lower openings of the through holes of the bottom layer 1, and the upper and lower welding grooves are welded by using a plug weld 6; in the same way, the positions of the bottom layer 1 and the working layer 2 for assembling the through nails 5 are through holes, the upper end surfaces of the through nails are lower than the upper contour surface of the working layer 2, the lower end surfaces of the through nails are higher than the lower contour surface of the bottom layer 1, and the empty positions of the upper and lower ends of the through nails are welded by a plug weld 6.
When molten iron flows into the cast iron die, spraying cooling water enters the gap layer 3 between the bottom layer 1 and the working layer 2 to cool the working layer 2 and the bottom layer 1, and the cooling effect on the bottom layer 1 and the working layer 2 is achieved.
The bottom layer 1 is made of cast carbon steel for general engineering, and the bottom layer 1 of the cast carbon steel is preferably made of ZG230-450 carbon steel.
The working layer 2 is made of chromium-nickel austenite oxidation-resistant steel, preferably 06Cr19Ni10 stainless steel, and the thickness of the working layer is half of that of the cast carbon steel matrix 1. The material of the working layer 2 can also be selected from low-carbon low-alloy heat-resistant steel ASTM/WC series, such as WC1, WC4, WC5, WC6 and WC9, in consideration of different user bearing capacities.
The through nail 5 and the supporting block 4 are key points for connecting the bottom layer 1 and the working layer 2, and the material is chromium-nickel austenite oxidation-resistant steel, preferably 06Cr19Ni10 stainless steel.
The plug weld 6 is made of a material equivalent to the chromium-nickel austenite oxidation resistant steel working layer 2, and preferably A102. If the material of the working layer 2 is selected from low carbon low alloy heat resistant steel ASTM/WC series, such as WC1, WC4, WC5, WC6, WC9, the plug weld 6 is also made of a material equivalent to chrome-nickel austenite oxidation resistant steel, preferably A102.
According to the working condition that the cast iron mold repeatedly receives high-temperature molten iron at about 1400 ℃ during working, gray cast iron, nodular cast iron, heat-resistant cast iron and low-carbon cast steel are difficult to bear long-term service, and composite refractory materials in inner cavities are not resistant to molten iron erosion. By the design innovation of the integral structure of the cast iron die, the service life of the cast iron die is prolonged, the shutdown maintenance time of the pig casting machine is reduced, the comprehensive production capacity of the pig casting machine is improved, and the running cost of the pig casting machine is correspondingly reduced.
While the preferred embodiments of the present invention have been described, it should be understood that various changes and modifications may be made therein by those skilled in the art without departing from the general concept of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (9)
1. A cast iron mould with a gap interlayer comprises a bottom layer and a working layer, and is characterized in that: and a gap layer is arranged between the bottom layer and the working layer, and a fixed support is arranged between the bottom layer and the working layer for connection.
2. A void sandwich cast iron mold as in claim 1, wherein: the bottom between the bottom layer and the working layer is fixedly connected through-nail welding.
3. A void sandwich cast iron mould as claimed in claim 1 or 2, wherein: the bottom layer and the periphery of the upper edge of the working layer are fixedly connected through supporting blocks in a welding mode.
4. A void sandwich cast iron mould as claimed in claim 2, wherein: the through-nail welding is that the through-nail penetrates through the bottom layer and the working layer, and the two ends of the through-nail are welded by plug welds.
5. A void sandwich cast iron mold as in claim 1, wherein: the thickness of the working layer is half of that of the bottom layer.
6. A void sandwich cast iron mold as in claim 1, wherein: the material of the bottom layer adopts ZG230-450 carbon steel.
7. A void sandwich cast iron mold as in claim 1, wherein: the working layer is made of chromium-nickel austenite oxidation resistant steel or low-carbon low-alloy heat-resistant steel.
8. A void sandwich cast iron mold as in claim 1, wherein: the support block and the through nail used between the bottom layer and the working layer are made of chromium-nickel austenite anti-oxidation steel.
9. The cast iron mold with a void interlayer as set forth in claim 4, wherein: the plug weld is made of chromium-nickel austenite anti-oxidation steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121967842.6U CN218395849U (en) | 2021-08-20 | 2021-08-20 | Cast iron mould with gap interlayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121967842.6U CN218395849U (en) | 2021-08-20 | 2021-08-20 | Cast iron mould with gap interlayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218395849U true CN218395849U (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121967842.6U Active CN218395849U (en) | 2021-08-20 | 2021-08-20 | Cast iron mould with gap interlayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218395849U (en) |
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2021
- 2021-08-20 CN CN202121967842.6U patent/CN218395849U/en active Active
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