CN109724421B - Grate plate of circular cooler - Google Patents
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- CN109724421B CN109724421B CN201910139978.9A CN201910139978A CN109724421B CN 109724421 B CN109724421 B CN 109724421B CN 201910139978 A CN201910139978 A CN 201910139978A CN 109724421 B CN109724421 B CN 109724421B
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Abstract
The invention discloses a grate plate of a circular cooler, belonging to the field of sintering equipment in the steel industry, and comprising a grate plate body, an alloy grid plate, a top wear-resistant alloy layer and a side wear-resistant alloy layer; the alloy grid plate is arranged on the upper surface of the grate plate body and is fixedly connected with the grate plate body; the top surface wear-resistant alloy layer is arranged on the alloy grid plate and completely covers the alloy grid plate; the side wear-resistant alloy layers are arranged in the easily-worn areas on the two sides of the grate plate body. According to the invention, the wear-resistant alloy layers are built up on the top surface and the side surface of the grate plate body, and the alloy grid plate is arranged below the built-up welding layer to form the framework structure, so that the wear resistance of the grate plate is improved, the problem of local deformation of the grate plate caused by large heat input of the built-up welding layer of the grate plate is solved, the weight of the grate plate is effectively reduced, the installation efficiency is improved, and the built-up welding workload is small.
Description
Technical Field
The invention relates to the field of sintering equipment in the steel industry, in particular to a grate plate of a circular cooler.
Background
The grate plate is an important component of the circular cooler and is used for transporting and treating mineral aggregates with the temperature of about 1000 ℃. The grate plate of the annular cooler is seriously abraded due to complex and uneven stress under the scouring action of high-temperature sinter under the action of larger impact load and heat load in the working process. The service life of the annular cooler is directly related to the integral equipment utilization rate or the maintenance frequency of a sintering production line, so that the improvement of the wear resistance of the surface of the annular cooler grate plate is the current primary task of the industry.
In order to increase the wear resistance of the grid plate, the traditional manufacturing method generally installs wear-resistant alloy blocks on the surface of the grid plate through various technical means or directly deposits a wear-resistant alloy layer on the surface of the grid plate in a surfacing mode. Patent 201320345056.1 discloses a comb plate with an inverted T-shaped slot and a U-shaped positioning slot on the upper part, wherein the bottom of a wear-resistant alloy block is provided with a clamping bolt matched with the inverted T-shaped slot, then the wear-resistant alloy block is arranged in the T-shaped slot, and finally a positioning block is placed in the U-shaped positioning slot to fix the wear-resistant alloy block on the upper part of the comb plate. In patent 201310121817.X, a wear-resistant alloy block and a grid plate parent body are connected by bolts. In the implementation process of the above patents, the grid plate precursors with special structures need to be used, and the manufacturing process of the grid plate precursors with special structures is complex. Because the mass and the volume of the alloy blocks are larger, and the alloy blocks and the matrix of the grid plate are connected together by a physical method, when the grid plate is impacted greatly, the alloy blocks are easy to loosen and even fall off.
Patent 200420039274.3 discloses overlaying a wear-resistant alloy layer directly on the easily worn parts on both sides of the grate plate, the upper part of the grate plate with serious wear adopts a composite structure composed of a base material and a plurality of wear-resistant layers manufactured by overlaying method, and two adjacent wear-resistant layers are separated by a layer of base material. If the direct overlaying method is used like the method in the patent, because the size of the grid plate is larger, and parts require larger wear-resistant layer thickness, the overlaying workload is very huge, the parts with the thicker overlaying layer can also cause the local deformation of the grid plate due to larger heat input, the weight of the grid plate is greatly increased after overlaying, and the installation of the grid plate is not facilitated.
Therefore, the market needs a grate plate of the circular cooler with strong wear resistance, light weight, low cost and difficult deformation.
Disclosure of Invention
The invention aims to provide a grate plate of a circular cooler, which solves the problems in the prior art and has the advantages of strong wear resistance, light weight, low cost and difficult deformation.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a grate plate of a circular cooler, which comprises a grate plate body, an alloy grid plate, a top wear-resistant alloy layer and a side wear-resistant alloy layer, wherein the top wear-resistant alloy layer is arranged on the top surface of the grate plate body; the alloy grid plate is arranged on the upper surface of the grate plate body and is fixedly connected with the grate plate body; the top surface wear-resistant alloy layer is arranged on the alloy grid plate and completely covers the alloy grid plate; the side wear-resistant alloy layers are arranged in the easily-worn areas on the two sides of the grate plate body.
Optionally, the grate plate body is of a symmetrical structure, two bosses are symmetrically arranged on two sides of the top of the grate plate body, and the two bosses are separated by a groove.
Optionally, two sides of the alloy grid plate are respectively provided with a first alloy steel plate, the first alloy steel plates are fixedly connected with the grate plate body, and the sum of the lengths of the alloy grid plate and the two first alloy steel plates is equal to the length of the boss.
Optionally, the end parts of two side surfaces of the grid plate body are respectively provided with a second alloy steel plate, and the second alloy steel plates are fixedly connected with the grid plate body.
Optionally, the first alloy steel plate has dimensions of 240mm x 100mm x 10 mm; the size of the second alloy steel plate is 200mm multiplied by 65mm multiplied by 10mm, the side face, close to the end face of the grid plate body, of the second alloy steel plate is 15mm away from the end face of the grid plate body, and the upper end face of the second alloy steel plate is 15mm away from the upper surface of the grid plate body.
Optionally, the alloy grid plate, the first alloy steel plate and the second alloy steel plate are all made of high-chromium wear-resistant heat-resistant cast steel, and the mass contents of main alloy elements are as follows: 18 to 23 percent of Cr and 8 to 12 percent of Ni, which are austenitic wear-resistant heat-resistant cast steel.
Optionally, the alloy grid plate has dimensions of 747mm × 100mm × 30mm, nine square holes of 75mm × 80mm are sequentially arranged inside the alloy grid plate, the wall thickness between adjacent square holes is 7mm, the wall thickness of the left end and the wall thickness of the right end of the grid plate are 8mm, and the wall thickness of the front end and the rear end of the grid plate are 10 mm.
Optionally, the material of the grate plate body is S235 steel, and the three-dimensional size of the grate plate body is 3300mm × 100mm × 397 mm; the size of boss top surface is 1230mm 100mm, the recess depth 30mm in the middle of two the boss, long 250 mm.
Optionally, the side wear-resistant alloy layer is 2710mm long.
Optionally, the alloy grid plate, the first alloy steel plate and the second alloy steel plate are all welded to the grate plate body; the top surface wear-resistant alloy layer and the side surface wear-resistant alloy layer are formed by overlaying welding through W-shaped welding channels.
Compared with the prior art, the invention has the following technical effects:
according to the invention, the wear-resistant alloy layers are built up on the top surface and the side surface of the grate plate body, and the alloy grid plate is arranged below the built-up welding layer to form the framework structure, so that the wear resistance of the grate plate is improved, the problem of local deformation of the grate plate caused by large heat input of the built-up welding layer of the grate plate is solved, the weight of the grate plate is effectively reduced, the installation efficiency is improved, and the built-up welding workload is small.
The arrangement of the boss structure can facilitate the positioning and installation of the alloy grid plate, and the boss position is close to the side of the material pouring groove and is the most easily worn part of the whole grate plate, so that the wear resistance of the grate plate is greatly enhanced.
The first alloy steel plate plays a limiting role in the alloy grid plate, and the alloy grid plate is guaranteed to be firmly combined with the grid plate body, so that the reinforcing effect of the alloy grid plate is better exerted.
The second alloy steel plate plays a limiting role when the grid plate and the trolley are assembled, so that the grid plate body is more firmly embedded into the positioning groove of the trolley.
The alloy grid plate, the first alloy steel plate and the second alloy steel plate are all made of high-chromium wear-resistant heat-resistant cast steel, have high stability at high temperature, and can effectively enhance the wear-resistant strength and the thermal stability of the grate plate.
The W-shaped welding channel not only reduces the dilution rate of the base metal of the grid plate, but also reduces the influence of the metal anisotropy of the surfacing layer on the mechanical property of the base metal, and effectively prolongs the service life of the grid plate under the condition of increasing the cost as low as possible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an overall structure diagram of a grate plate of a circular cooler provided by the invention;
FIG. 2 is a top view of a grate plate of the circular cooler provided by the invention;
FIG. 3 is a front view of a grate plate body in the grate plate of the ring cooler provided by the invention;
FIG. 4 is a top view of an alloy grid plate in the grate plate of the ring cooler provided by the invention;
FIG. 5 is a schematic view of a W-shaped weld.
In the figure: 1-a grid plate body; 11-a boss; 12-a groove; 2-alloy grid plate; 3-side wear-resistant alloy layer; 4-first alloy steel sheet; 5-second alloy steel plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
The invention aims to provide a grate plate of a circular cooler, which solves the problems in the prior art and has the advantages of strong wear resistance, light weight, low cost and difficult deformation.
The grate plate of the ring cooling machine provided by the invention comprises a grate plate body, an alloy grid plate, a top wear-resistant alloy layer and a side wear-resistant alloy layer; the alloy grid plate is arranged on the upper surface of the grate plate body and is fixedly connected with the grate plate body; the top surface wear-resistant alloy layer is arranged on the alloy grid plate and completely covers the alloy grid plate; the side wear-resistant alloy layers are arranged in the easily-worn areas on the two sides of the grate plate body.
According to the invention, the wear-resistant alloy layers are built up on the top surface and the side surface of the grate plate body, and the alloy grid plate is arranged below the built-up welding layer to form the framework structure, so that the wear resistance of the grate plate is improved, the problem of local deformation of the grate plate caused by large heat input of the built-up welding layer of the grate plate is solved, the weight of the grate plate is effectively reduced, the installation efficiency is improved, and the built-up welding workload is small.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-4, the grate plate of the ring cooling machine provided by the invention comprises a grate plate body 1, an alloy grid plate 2, a top wear-resistant alloy layer and a side wear-resistant alloy layer 3; the alloy grid plate 2 is arranged on the upper surface of the grate plate body 1 and is fixedly connected with the grate plate body 1; the top surface wear-resistant alloy layer is arranged on the alloy grid plate 2, and the alloy grid plate 2 is completely covered by the top surface wear-resistant alloy layer; the side wear-resistant alloy layers 3 are arranged in the easily-worn areas on the two sides of the grate plate body 1.
During processing, oil stains and oxides on the surfaces of the alloy grid plate 2 and the grate plate body 1 are cleaned, a part to be brazed is preheated to 100-plus-200 ℃ before welding, the peripheries of all square holes in the alloy grid plate 2 are welded with the grate plate body 1 by using an LQ643 welding wire, then wear-resistant layers are built on the upper portion of the alloy grid plate 2 and the easily-worn areas on the two sides of the grate plate body 1, a top wear-resistant alloy layer and a side wear-resistant alloy layer 3 are formed, and the upper portion of the alloy grid plate 2 is built on the upper portion of the alloy grid plate to be flush with the upper openings of the square holes of the; the thick wear-resistant alloy layer on the upper part of the grid plate body 1 is divided into a plurality of small blocks through the alloy grid plate 2, so that the heat input in the welding process is greatly reduced, and the deformation of the welded grid plate body 1 is reduced.
Furthermore, the grid plate body 1 is of a symmetrical structure, two bosses 11 are symmetrically arranged on two sides of the top of the grid plate body, and the two bosses 11 are separated by a groove 12.
Furthermore, two sides of the alloy grid plate 2 are respectively provided with a first alloy steel plate 4, the first alloy steel plates 4 are fixedly connected with the grate plate body 1, and the sum of the lengths of the alloy grid plate 2 and the two first alloy steel plates 4 is equal to the length of the lug boss 11.
During machining, a beveled first alloy steel plate 4 is arranged at the leftmost end or the rightmost end of a boss 11, the first alloy steel plate 4 is welded on the boss 11 by using an LQ643 welding wire, then an alloy grid plate 2 is arranged next to the welded first alloy steel plate 4, the peripheries of all square holes in the alloy grid plate 2 are welded with the boss 11 of a grate plate by using the LQ643 welding wire, finally, another beveled first alloy steel plate 4 is arranged next to the alloy grid plate 2, the LQ643 welding wire is welded on the boss 11, and another boss 11 is welded with one alloy grid plate 2 and two first alloy steel plates 4 in the same method.
Furthermore, the end parts of two side surfaces of the grid plate body 1 are respectively provided with a second alloy steel plate 5, and the second alloy steel plates 5 are fixedly connected with the grid plate body 1.
Four second alloy steel plates 5 are welded at the left end and the right end of the two side surfaces of the grate plate body 1 by LQ643 welding wires, and the second alloy steel plates 5 and the grate plate body 1 are welded fully.
When the alloy grid plate 2, the first alloy steel plate 4 and the second alloy steel plate 5 are welded with the grate plate body 1, the diameter of an LQ643 gas shielded welding wire used is 2.8mm, the welding current is 390A, the welding voltage is 30V, and the welding speed is 80 mm/min.
Further, the first alloy steel sheet 4 has dimensions of 240mm × 100mm × 10 mm; the size of the second alloy steel plate 5 is 200mm multiplied by 65mm multiplied by 10mm, the side face of the second alloy steel plate 5 close to the end face of the grid plate body 1 is 15mm away from the end face of the grid plate body 1, and the upper end face of the second alloy steel plate 5 is 15mm away from the upper surface of the grid plate body 1.
Further, the alloy grid plate 2, the first alloy steel plate 4 and the second alloy steel plate 5 are all made of high-chromium wear-resistant heat-resistant cast steel, and the mass contents of main alloy elements are as follows: 18 to 23 percent of Cr and 8 to 12 percent of Ni, which are austenite wear-resistant and heat-resistant cast steel, have strong stability at high temperature, and preferably adopt ZG30Cr20Ni10Austenitic wear-resistant heat-resistant cast steel.
Further, the size of the alloy grid plate 2 is 747mm × 100mm × 30mm, nine square holes 75mm × 80mm are sequentially arranged inside the alloy grid plate, the wall thickness between adjacent square holes is 7mm, the wall thickness of the left end and the right end of the grid plate is 8mm, and the wall thickness of the front end and the rear end of the grid plate is 10 mm. The porous structure reduces the heat input during surfacing and reduces the thermal deformation of the welded grid plate body 1; the reason that the wall thickness of the periphery of the alloy grid plate 2 is slightly thicker than the wall thickness of the grid plate between the square holes in the interior is that the grid plate is of a hollow structure, the wall thickness of the periphery is required to ensure that the grid plate cannot be easily deformed, and the wall thickness of the square holes in the interior is slightly thinner so as to improve the welding area as much as possible, so that the top surface wear-resistant alloy layer and the grate plate body 1 are combined more tightly, and the combination strength of the top surface wear-resistant alloy layer.
Furthermore, the grid plate body 1 is made of S235 steel, so that the welding performance is good, the toughness and the shock resistance are good, and the economy is strong; the three-dimensional size of the grate plate body 1 is 3300mm multiplied by 100mm multiplied by 397 mm; the top surface of the boss 11 is 1230mm × 100mm, and the groove 12 in the middle of the two bosses 11 is 30mm deep and 250mm long.
Further, the side wear-resistant alloy layer 3 is 2710mm long.
Further, the alloy grid plate 2, the first alloy steel plate 4 and the second alloy steel plate 5 are all connected with the grate plate body 1 in a welding mode; as shown in fig. 5, the top wear-resistant alloy layer and the side wear-resistant alloy layer 3 are formed by overlaying welding through W-shaped welding channels.
In the process of overlaying the top and side wear-resistant alloy layers 3, the W-shaped weld bead is realized by swinging the electrode in a constant-speed linear manner with an amplitude of 60mm, a weld width of 25-30mm and a period of 200 mm.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. The utility model provides a cold quick-witted comb board of ring which characterized in that: the grate comprises a grate body, an alloy grid plate, a top wear-resistant alloy layer and a side wear-resistant alloy layer; the alloy grid plate is arranged on the upper surface of the grate plate body and is fixedly connected with the grate plate body; the top surface wear-resistant alloy layer is arranged on the alloy grid plate and completely covers the alloy grid plate; the side wear-resistant alloy layers are arranged in easily-worn areas on two sides of the grate plate body;
the grate plate body is of a symmetrical structure, two bosses are symmetrically arranged on two sides of the top of the grate plate body, and the two bosses are separated by a groove;
first alloy steel plates are arranged on two sides of the alloy grid plate respectively, the first alloy steel plates are fixedly connected with the grate plate body, and the sum of the lengths of the alloy grid plate and the two first alloy steel plates is equal to the length of the lug boss.
2. The ring cooler grate plate of claim 1, wherein: and the end parts of two side surfaces of the grid plate body are respectively provided with a second alloy steel plate, and the second alloy steel plates are fixedly connected with the grid plate body.
3. The ring cooler grate plate of claim 2, wherein: the size of the first alloy steel plate is 240mm multiplied by 100mm multiplied by 10 mm; the size of the second alloy steel plate is 200mm multiplied by 65mm multiplied by 10mm, the side face, close to the end face of the grid plate body, of the second alloy steel plate is 15mm away from the end face of the grid plate body, and the upper end face of the second alloy steel plate is 15mm away from the upper surface of the grid plate body.
4. The ring cooler grate plate of claim 2, wherein: the alloy grid plate, the first alloy steel plate and the second alloy steel plate are all made of high-chromium wear-resistant heat-resistant cast steel.
5. The ring cooler grate plate of claim 1, wherein: the alloy grid plate is 747mm 100mm 30mm in size, nine 75mm 80mm square holes are sequentially arranged inside the alloy grid plate, the wall thickness between every two adjacent square holes is 7mm, the wall thickness of the left end and the right end of the grid plate is 8mm, and the wall thickness of the front end and the rear end of the grid plate is 10 mm.
6. The ring cooler grate plate of claim 1, wherein: the material of the grate plate body is S235 steel, and the three-dimensional size of the grate plate body is 3300mm multiplied by 100mm multiplied by 397 mm; the size of boss top surface is 1230mm 100mm, the recess depth 30mm in the middle of two the boss, long 250 mm.
7. The ring cooler grate plate of claim 1, wherein: the side wear-resistant alloy layer is 2710mm long.
8. The ring cooler grate plate of claim 2, wherein: the alloy grid plate, the first alloy steel plate and the second alloy steel plate are all connected with the grate plate body in a welding mode; the top surface wear-resistant alloy layer and the side surface wear-resistant alloy layer are formed by overlaying welding through W-shaped welding channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910139978.9A CN109724421B (en) | 2019-02-26 | 2019-02-26 | Grate plate of circular cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910139978.9A CN109724421B (en) | 2019-02-26 | 2019-02-26 | Grate plate of circular cooler |
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| Publication Number | Publication Date |
|---|---|
| CN109724421A CN109724421A (en) | 2019-05-07 |
| CN109724421B true CN109724421B (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910139978.9A Active CN109724421B (en) | 2019-02-26 | 2019-02-26 | Grate plate of circular cooler |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2598644Y (en) * | 2003-02-13 | 2004-01-14 | 贾利新 | New type hard wearing grate plate of agglomerate single roll crusher |
| CN2736059Y (en) * | 2004-06-22 | 2005-10-26 | 攀钢集团钢城企业总公司溶解乙炔厂 | Grid plate of sintering crusher |
| CN103212465A (en) * | 2013-04-09 | 2013-07-24 | 莱芜钢铁集团有限公司 | Single-roll grid plate and manufacture method thereof |
| CN207222026U (en) * | 2017-09-06 | 2018-04-13 | 永安市辉煌铸造有限公司 | A kind of inexpensive and durable sintering single roll crusher grid plate device |
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