Integrally-formed chute for pouring

Abstract

The utility model discloses an integrally-formed pouring chute which comprises a chute metal outer frame and a refractory lining arranged on the inner periphery of the chute metal outer frame, and the surface of the refractory lining is at least coated with a refractory coating for two times. One end of the chute is a molten iron receiving end, the other end of the chute is a molten iron pouring end, the middle of the chute is a long-strip-shaped chute section, the section size of the long-strip-shaped chute section is smaller than that of the molten iron receiving end or the molten iron pouring end, and a vertically-through pouring opening is formed in the bottom of the molten iron pouring end. And a high-temperature-resistant filter screen is arranged above the sprue gate. The integrally-formed chute for pouring is simple in structure, good in strength and stability and excellent in fire resistance, a long molten iron flowing channel can be formed between a casting cavity and a ladle, molten iron can flow into the casting cavity conveniently, and beneficial conditions capable of being poured are provided for the environment where direct pouring of the ladle or multi-ladle pouring production is inconvenient.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to an integrally formed pouring chute. Background Art

[0002] At present, in the casting production process, large castings mostly use mold sand to make a pouring ladle (also called a pouring cup for small ones) to assist in the pouring of molten iron. For some large and super-large castings, when the amount of molten iron poured at a time exceeds tens of tons or even hundreds of tons, the commonly used ladle with a fixed pouring mouth cannot meet the requirements of direct pouring of two or more ladles of molten iron. This kind of multi-ladle and multi-tonnage pouring requires the use of a chute to guide the molten iron for pouring; the existing chute length and structural design are simple and unstable, and it is impossible to filter out the oxide slag, and the molten iron remaining in the chute is not easy to remove after solidification. Summary of the invention

[0003] The utility model aims to provide an integrally formed pouring chute in view of the problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An integrally formed pouring chute comprises a metal outer frame of the chute, and a refractory lining arranged on the inner periphery of the metal outer frame of the chute, wherein the surface of the refractory lining is at least coated with a refractory coating; one end of the chute is a molten iron receiving end, the other end is a molten iron pouring end, and the middle part is a long strip chute section, the cross-sectional dimension of the long strip chute section is smaller than the cross-sectional dimension of the molten iron receiving end or the molten iron pouring end, a pouring port penetrating from top to bottom is provided at the bottom of the molten iron pouring end, a high temperature resistant filter is provided above the pouring port, and there is at least one pouring port.

[0006] The integrally formed pouring chute has a simple structure, good strength and stability, and excellent fire resistance. It can form a long molten iron flow channel between the casting cavity and the ladle to facilitate the molten iron to flow into the casting cavity, providing favorable conditions for pouring in an environment where it is inconvenient to directly pour with the ladle or for multiple ladle pouring production.

[0007] The metal outer frame of the chute is the main load-bearing structure, which is not only high in strength and stable in structure, but also not afraid of external bumps, and can be used in a foundry workshop with a complex environment; the refractory lining plays a major role in heat insulation and fire resistance, and can form a high-temperature resistant molten iron channel in the metal outer frame of the chute. On the one hand, it can avoid the erosion of the metal outer frame of the chute by high-temperature molten iron, and on the other hand, it can avoid the molten iron from being overcooled during the flow process. Moreover, the refractory lining has a certain strength after forming and can resist the erosion of molten iron; the setting of the refractory coating and its special internal shape can further enhance the high-temperature resistance of the chute, and at the same time form a peelable coating structure on the surface of the refractory lining, which is convenient for the subsequent separation of residual molten iron and can also reduce the mixing of sand impurities into the molten iron.

[0008] After the metal outer frame of the chute is made into the required chute shape and size according to the drawings, a refractory lining is poured into it. After the refractory lining is cured and formed, it is baked and then the refractory coating is applied. After the refractory coating is dried, it can be put into use.

[0009] The molten iron receiving end can be used to receive the molten iron poured from the ladle. After the molten iron passes through the transition of the long strip chute section, it can reach the molten iron pouring end. The molten iron pouring end is arranged above the pouring system of the casting cavity. The molten iron that arrives can flow to the pouring system through the pouring port. The high temperature resistant filter can filter the unmelted impurities in the molten iron to prevent the impurities from entering the pouring system and the casting cavity. The cross-sectional dimensions of the molten iron receiving end and the molten iron pouring end are slightly larger, which is convenient for receiving the molten iron and pouring the molten iron.

[0010] Furthermore, the inner side walls of the chute are inclined wall structures, and the inner bottom wall and the inner side walls of the chute are transitioned into large arc shapes, so that the molten iron remaining in the chute can be demoulded and cleaned quickly, and can be reused after cleaning on the same day.

[0011] Furthermore, the inner bottom wall of the elongated chute section is inclined from the molten iron receiving end to the molten iron pouring end, a gradually narrowing closing structure is provided between the molten iron receiving end and the elongated chute section, and a circular arc transition is provided at the turning point, and a gradually widening expanding structure is provided between the elongated chute section and the molten iron pouring end, and a circular arc transition is also provided at the turning point.

[0012] Furthermore, an inner folding structure is provided at the upper end of the metal outer frame of the chute so that the inner peripheral wall of the metal outer frame of the chute has a concave space, and a boss structure is also provided on the upper end surface of the metal outer frame of the chute, and the refractory lining covers the entire concave space and the inner side of the boss structure.

[0013] Furthermore, the metal outer frame of the chute is provided with a plurality of longitudinally and / or transversely arranged ribs in the concave space, which is beneficial to the attachment of the refractory lining and can improve the connection forming strength of the refractory lining. The upper end surface of the refractory lining does not exceed the upper end surface of the boss structure.

[0014] Furthermore, the metal outer frame of the chute is a cast iron part or a welded steel plate part, and the refractory lining is an integrally cast refractory material and / or masonry refractory bricks.

[0015] Furthermore, the metal outer frame of the chute is provided with a plurality of hangers on both sides of the long strip chute section, the metal outer frame of the chute is provided with a plurality of connecting sleeves on both sides of the molten iron receiving end, and the metal outer frame of the chute is provided with an opening with a diameter larger than the diameter of the pouring port at the bottom of the molten iron pouring end.

[0016] In some embodiments, the elongated chute section is provided with a plurality of filter baffles between the inner peripheral walls of the refractory lining.

[0017] In some embodiments, a cover plate is provided above the chute to reduce oxidation of the molten iron, and the cover plate at least covers the elongated chute section and the molten iron pouring end. A refractory lining and a supporting protrusion are provided below the cover plate, and the supporting protrusion is supported on the metal outer frame of the chute. A plurality of lifting rings are provided above the cover plate.

[0018] Furthermore, the overall length of the chute is at least 1m, for example, 3 to 20m, the overall width of the molten iron receiving end and the molten iron pouring end is 600 to 800mm, the overall width of the long strip chute section is 400 to 600mm, the overall wall thickness of the chute is not less than 60mm, and the depth of the chute is not less than 400mm.

[0019] Compared with the prior art, the beneficial effects of the utility model are: 1. The integrally formed pouring chute has a simple structure, good strength and stability, and excellent fire resistance. It can form a longer molten iron circulation channel between the casting cavity and the ladle, so that the molten iron can flow into the casting cavity, providing favorable conditions for pouring in an environment where it is inconvenient to directly pour the ladle or to produce multiple ladles of casting; 2. The metal outer frame of the chute is the main load-bearing structure, which is not only strong and structurally stable, but also not afraid of external collisions, and can be used in a foundry with a complex environment; the refractory lining plays a major role in heat insulation and fire resistance, which can avoid the erosion of the metal outer frame of the chute by high-temperature molten iron, and can also avoid overcooling of the molten iron during the flow process; the provision of the refractory coating can further enhance the high temperature resistance of the chute At the same time, a peelable coating structure is formed on the surface of the refractory lining, which is convenient for the subsequent separation of residual molten iron and can also reduce the mixing of sand impurities into the molten iron; 3. The molten iron receiving end can be used to receive the molten iron poured from the ladle. The molten iron can reach the molten iron pouring end after the transition of the long strip chute section. The molten iron pouring end is arranged above the pouring system of the casting cavity. The molten iron that arrives can flow to the pouring system through the pouring port; 4. The high temperature resistant filter can filter the unmelted impurities in the molten iron to prevent impurities from entering the pouring system and the casting cavity; 5. The cover plate can play the role of heat insulation and partial sealing, which can reduce the heat loss of molten iron and the oxidation of the molten iron surface; 6. It can realize repeated and repeated recycling to improve turnover efficiency and utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the top view of an integrally formed pouring chute of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the middle AA section;

[0022] Figure 3 for Figure 1 Schematic diagram of the structure of the middle BB section;

[0023] Figure 4 It is a schematic diagram of the specific structure of the inner peripheral wall of the metal outer frame of the chute of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of a filter baffle in the chute of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of a cover plate provided on the chute of the utility model;

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of a cover plate provided on the chute of the utility model;

[0027] In the figure: 1. metal outer frame of the chute; 101. inner folding edge structure; 102. boss structure; 103. rib plate; 2. refractory lining; 3. refractory coating; 4. long strip chute section; 5. molten iron receiving end; 6. molten iron pouring end; 7. closing structure; 8. expanding structure; 9. pouring port; 10. high temperature resistant filter screen; 11. filter baffle; 12. lifting handle; 13. connecting sleeve; 14. cover plate; 1401. supporting protrusion; 15. lifting ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] like Figure 1 to Figure 3 As shown, an integrally formed pouring chute comprises a chute metal outer frame 1, and a refractory lining 2 arranged on the inner periphery of the chute metal outer frame 1, the surface of the refractory lining 2 is coated with a refractory coating 3; one end of the chute is a molten iron receiving end 5, the other end is a molten iron pouring end 6, and the middle part is a long strip chute section 4, the cross-sectional dimension of the long strip chute section 4 is smaller than the cross-sectional dimension of the molten iron receiving end 5 or the molten iron pouring end 6, the bottom of the molten iron pouring end 6 is provided with a pouring port 9 penetrating from top to bottom, and a high temperature resistant filter screen 10 is provided above the pouring port 9.

[0031] The integrally formed pouring chute has a simple structure, good strength and stability, and excellent fire resistance. It can form a long molten iron flow channel between the casting cavity and the ladle to facilitate the molten iron to flow into the casting cavity, providing favorable conditions for pouring in an environment where it is inconvenient to directly pour with the ladle or for multiple ladle pouring production.

[0032] The metal outer frame 1 of the chute is the main load-bearing structure, which is not only high in strength and stable in structure, but also not afraid of external bumps, and can be used in a casting workshop with a complex environment; the refractory lining 2 plays the main role of heat insulation and fire resistance, and can form a high-temperature resistant molten iron channel in the metal outer frame 1 of the chute. On the one hand, it can avoid the erosion of the metal outer frame 1 of the chute by high-temperature molten iron, and on the other hand, it can avoid the molten iron from being overcooled during the flow process. Moreover, the refractory lining 2 also has a certain strength after forming and can resist the erosion of molten iron; the setting of the refractory coating 3 can further enhance the high-temperature resistance of the chute, and at the same time form a peelable coating structure on the surface of the refractory lining, which is convenient for the subsequent separation of residual molten iron and can also reduce the mixing of sand impurities into the molten iron.

[0033] After the chute metal outer frame 1 is made into the required chute shape and size according to the drawings, the refractory lining 2 is poured into the interior. After the refractory lining 2 is solidified, the refractory coating 3 is applied. After the refractory coating 3 is dried, it can be put into use.

[0034] The molten iron receiving end 5 can be used to receive the molten iron poured from the ladle. After the molten iron passes through the transition of the long strip chute section 4, it can reach the molten iron pouring end 6. The molten iron pouring end 6 is arranged above the pouring system of the casting cavity. The molten iron that arrives can flow to the pouring system through the pouring port 9. The high temperature resistant filter 10 can filter the unmelted impurities in the molten iron to prevent the impurities from entering the pouring system and the casting cavity. The cross-sectional dimensions of the molten iron receiving end 5 and the molten iron pouring end 6 are slightly larger, which is convenient for receiving the molten iron and pouring the molten iron.

[0035] Furthermore, the inner side walls of the chute are inclined wall structures, and the inner bottom wall and the inner side walls of the chute are respectively transitioned in a large arc shape. That is to say, the cross section of the chute is similar to a "U"-shaped structure, and the inclined wall structures on both sides and the large arc-shaped transition at the bottom facilitate the demoulding of the residual molten iron after solidification; after each use, the chute can be used again after the residual molten iron is cleaned and the refractory coating is applied again. The refractory lining has an extremely high repeated service life. After hundreds or even thousands of uses or when the refractory lining is damaged on a large scale, the refractory lining can be re-cast, and the metal outer frame of the chute can be used for a long time.

[0036] Furthermore, the inner bottom wall of the elongated chute section 4 is slightly inclined from the molten iron receiving end 5 to the molten iron pouring end 6, a gradually narrowing closing structure 7 is provided between the molten iron receiving end 5 and the elongated chute section 4, and a circular arc transition is provided at the turning point, and a gradually widening expanding structure 8 is provided between the elongated chute section 4 and the molten iron pouring end 6, and a circular arc transition is also provided at the turning point.

[0037] Such an arrangement facilitates the forward flow of molten iron. The arc transitions can avoid stress concentration and reduce corner resistance, which is beneficial to the flow of molten iron. At the same time, when the molten iron shrinks automatically, it will not adhere to the refractory lining, thus achieving rapid demoulding.

[0038] Furthermore, an inner folding structure 101 is provided at the upper end of the chute metal outer frame 1 so that the inner peripheral wall of the chute metal outer frame 1 has a concave space. A boss structure 102 is also provided on the upper end surface of the chute metal outer frame 1, and the refractory lining covers the entire concave space and the inner side of the boss structure 102.

[0039] That is, the refractory lining 2 covers the entire inner circumference of the chute metal outer frame 1 and extends from the top; the inner folding edge structure 101 and the boss structure 102 can form a certain locking and limiting structure at the upper end, which is beneficial to ensure the connection stability of the refractory coating after curing.

[0040] Further, combined with Figure 4 As shown, the chute metal outer frame 1 is provided with a plurality of longitudinally and / or transversely arranged ribs 103 in the concave space, and the upper end surface of the refractory lining 2 does not exceed the upper end surface of the boss structure 102. The provision of these ribs 103 is conducive to the attachment of the refractory lining 2 and can improve the connection forming strength of the refractory lining 2.

[0041] Furthermore, the chute metal outer frame 1 is provided with a plurality of lifting handles 12 on both sides of the long strip chute section 4, which can lift the chute as a whole to facilitate the transportation of the chute; the chute metal outer frame 1 is provided with a plurality of connecting sleeves 13 on both sides of the molten iron receiving end 5, and these connecting sleeves 13 can be used as connecting supports, and a bracket can be set up above the molten iron receiving end, such as a bracket incubated with the flow.

[0042] The metal outer frame 1 of the chute is provided with an opening at the bottom of the molten iron pouring end 6, the diameter of which is larger than the diameter of the pouring port. The opening is used to arrange the pouring port 9, and the refractory lining 2 also covers the opening.

[0043] Furthermore, the chute metal outer frame 1 is an integrally formed cast iron part, the refractory lining 2 is an integrally cast refractory material and / or a masonry refractory brick, and the refractory coating may be composed of zircon powder coating. The high temperature resistant filter 10 is a ceramic filter, and the high temperature resistant filter 10 is mounted above the pouring port, that is, in the groove at the inner bottom of the refractory lining at the molten iron pouring end, and the high temperature resistant filter can also be fixed to the refractory lining by a connector to prevent the high temperature resistant filter from floating in the molten iron.

[0044] Preferably, the overall length of the chute is 6 to 12 m, the overall widths of the molten iron receiving end 5 and the molten iron pouring end 6 are respectively about 700 mm, the overall width of the long strip chute section 4 is about 500 mm, the overall wall thickness of the chute is not less than 60 mm, and the depth of the chute is not less than 400 mm.

[0045] In some embodiments, Figure 5 As shown, the elongated chute section 4 is provided with a filter baffle 11 between the inner peripheral walls of the refractory lining 2. The filter baffle 11 can block some slag in the process of molten iron flowing, and the filter baffle can be in contact with the bottom of the refractory lining or keep a certain distance from the bottom, which is similar to the arrangement structure of the baffle in the seat bag.

[0046] In some embodiments, Figure 6 and Figure 7 As shown, a cover plate 14 is further provided above the chute, and the cover plate 14 at least covers the long strip chute section 4 and the molten iron pouring end 6. A supporting protrusion 1401 is provided below the cover plate 14, and a refractory lining is also provided on the lower surface of the cover plate 14 to ensure its fire resistance and thermal insulation performance. The height of the supporting protrusion 1401 is not lower than the height of the boss structure 102, and the supporting protrusion 1401 can be directly supported on the metal outer frame 1 of the chute. A plurality of lifting rings 15 are also provided above the cover plate 14.

[0047] The cover plate 14 can be a heat-insulating cover plate, which can play the role of heat insulation and partial sealing, reducing the heat loss of molten iron on the one hand, and reducing the oxidation of the surface of molten iron on the other hand. The setting of the lifting ring 15 facilitates the handling and movement of the cover plate 14.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrally formed pouring chute, characterized in that: It includes a metal outer frame of a chute, and a refractory lining arranged on the inner periphery of the metal outer frame of the chute, the surface of the refractory lining is coated with a refractory coating; one end of the chute is a molten iron receiving end, the other end is a molten iron pouring end, and the middle part is a long strip chute section, the cross-sectional size of the long strip chute section is smaller than the cross-sectional size of the molten iron receiving end or the molten iron pouring end, the bottom of the molten iron pouring end is provided with a pouring port running through from top to bottom, and a high-temperature resistant filter is provided above the pouring port.

2. The integrally formed pouring chute according to claim 1, characterized in that: The inner side walls of the chute are inclined wall structures, and the inner bottom wall and the inner side walls of the chute are transitioned into a large arc shape.

3. The integrally formed pouring chute according to claim 1, characterized in that: The inner bottom wall of the elongated chute section is inclined from the molten iron receiving end to the molten iron pouring end, a gradually narrowing closing structure is provided between the molten iron receiving end and the elongated chute section, and a circular arc transition is provided at the turning point, and a gradually widening expanding structure is provided between the elongated chute section and the molten iron pouring end, and a circular arc transition is also provided at the turning point.

4. The integrally formed pouring chute according to claim 1, characterized in that: The upper end of the chute metal outer frame is provided with an inner folding structure so that the inner peripheral wall of the chute metal outer frame has a concave space. The upper end surface of the chute metal outer frame is also provided with a boss structure, and the refractory lining covers the entire concave space and the inner side of the boss structure.

5. The integrally formed pouring chute according to claim 4, characterized in that: The metal outer frame of the chute is provided with a plurality of longitudinally and / or transversely arranged rib plates in the inner concave space, and the upper end surface of the refractory lining does not exceed the upper end surface of the boss structure.

6. The integrally formed pouring chute according to claim 1, characterized in that: The metal outer frame of the chute is a cast iron part or a welded steel plate part, and the refractory lining is an integrally cast refractory material or a masonry refractory brick.

7. The integrally formed pouring chute according to claim 1, characterized in that: The metal outer frame of the chute is provided with a plurality of hanging handles on both sides of the long strip chute section, the metal outer frame of the chute is provided with a plurality of connecting sleeves on both sides of the molten iron receiving end, and the metal outer frame of the chute is provided with an opening with a diameter larger than the diameter of the pouring port at the bottom of the molten iron pouring end.

8. The integrally formed pouring chute according to claim 1, characterized in that: The elongated chute section is provided with a filtering baffle between the inner peripheral walls of the refractory lining.

9. The integrally formed pouring chute according to claim 1, characterized in that: A cover plate is also provided above the chute, and the cover plate at least covers the long strip chute section and the molten iron pouring end. A refractory lining and a supporting protrusion are provided below the cover plate, and the supporting protrusion is supported on the metal outer frame of the chute. A plurality of lifting rings are also provided above the cover plate.

10. The integrally formed pouring chute according to claim 1, characterized in that: The overall length of the chute is at least 1m, the overall widths of the molten iron receiving end and the molten iron pouring end are 600-800mm respectively, the overall width of the long strip chute section is 400-600mm, the overall wall thickness of the chute is not less than 60mm, and the depth of the chute is not less than 400mm.

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