A cooling platform specially used for ductile iron production

Abstract

The utility model discloses a cooling platform specially used for ductile iron production, belonging to the technical field of cast iron equipment. The utility model discloses a cooling platform specially used for ductile iron production, which belongs to the technical field of cast iron equipment. The utility model discloses a cooling platform specially used for ductile iron production, which comprises a cooling platform and a casting sand box installed on the top of the cooling platform. Two groups of S-shaped platform cooling pipes are arranged inside the cooling platform. A plurality of sand box heat dissipation pipes are connected above the S-shaped platform cooling pipes. The top of the sand box heat dissipation pipes extends to the inner cavity of the casting sand box, and a plurality of heat absorption holes are opened on the outer periphery of the extended end. The utility model can utilize the cooling platform made of cast iron material for heat conduction to promote cooling. At the same time, the heat near the casting in the solidification process is brought out to promote cooling by arranging the S-shaped platform cooling pipe in cooperation with the sand box heat dissipation pipe, thereby realizing effective control of the solidification cooling speed of the casting, improving the shrinkage cavity and shrinkage defects of the casting, and greatly improving the mechanical property quality of the casting.

Description

Technical Field

[0001] The utility model relates to the technical field of cast iron equipment, and more specifically to a cooling platform specially used for ductile iron production. Background Art

[0002] Ductile iron is a high-strength cast iron material whose comprehensive properties are close to those of steel. Based on its excellent properties, it has been successfully used to cast some parts with complex stresses and high requirements for strength, toughness and wear resistance.

[0003] At present, there are usually two types of methods or equipment for controlling the cooling speed of castings: the first type is the lost foam negative pressure casting production method, but this method can only be used for dry sand molding. During the casting solidification process, a large amount of heat can be taken away by the negative pressure difference to achieve the purpose of accelerating the cooling speed of the casting. It cannot be applied to resin sand casting production. In addition, under the negative pressure state, the cooling speed of the windward side of the casting is fast, and the cooling speed of the leeward side is slow. For some large plane structures, it is easy to cause serious deformation problems. The second type is the cold iron in casting. The cold iron can be dispersedly arranged to promote the priority cooling of certain specific parts, and finally achieve the effect of balanced solidification of the casting, which has a certain preventive effect on shrinkage cavities, but the cooling effect of this method is small, which makes the overall solidification speed of the casting slow, affecting its production efficiency. Therefore, in view of this, the existing structure is studied and improved, and a cooling platform specially used for ductile iron production is provided, in order to achieve a more practical purpose. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a cooling platform specially used for the production of ductile iron, which can promote cooling by utilizing the cooling platform made of cast iron for heat conduction, and also promote cooling by arranging an S-shaped platform cooling pipe in conjunction with a sand box heat dissipation pipe to bring out the heat near the casting during the solidification process, thereby achieving effective control of the solidification cooling rate of the casting, improving the shrinkage cavity and shrinkage defects of the casting, and greatly improving the mechanical properties of the casting.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A cooling platform specially used for ductile iron production comprises a cooling platform and a casting sand box installed on the top of the cooling platform, wherein two groups of S-shaped platform cooling pipes are arranged inside the cooling platform, a plurality of sand box heat dissipation pipes are connected above the S-shaped platform cooling pipes, the top of the sand box heat dissipation pipes extends to the inner cavity of the casting sand box, and a plurality of heat absorbing holes are arranged on the outer periphery of the extended end, and a plurality of flat plate heat dissipation grooves are arranged on the top surface of the cooling platform.

[0007] Furthermore, the inner cavity of the casting sand box is provided with a ductile iron casting, the ductile iron casting is provided with a pouring channel, and one end of the pouring channel extends to the outside of the casting sand box.

[0008] Furthermore, the inner cavity of the casting sand box is filled with furan resin sand, and the furan resin sand wraps the ductile iron casting.

[0009] Furthermore, an air inlet end and an air outlet end are respectively provided at both ends of the S-shaped platform cooling pipeline. The air inlet end and the air outlet end of the S-shaped platform cooling pipeline have the same structure and extend to both ends of the cooling platform respectively.

[0010] Furthermore, the extended end of the sand box heat dissipation pipe is staggered with the pouring channel.

[0011] Furthermore, both ends of the flat plate heat dissipation slot penetrate the cooling platform.

[0012] Furthermore, the cooling platform is a cast iron plate structure.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) This scheme injects compressed gas into the cooling pipe of the S-shaped platform for cooling. The cooling gas quickly passes through the heat dissipation pipe of the sand box, forming a negative pressure area at its bottom, driving the high-temperature gas entering from the upper heat absorption hole to flow rapidly downward until it enters the platform cooling pipe and flows out, taking away the heat in the sand box. At the same time, the heat received by the cooling platform from the casting sand box, furan resin sand, etc. can also be quickly taken away by the cooling gas in the cooling pipe of the S-shaped platform, effectively controlling the cooling rate of the casting during the solidification process to achieve a balance between preventing deformation and brittle cracking and improving mechanical properties, improving the shrinkage defects of the casting and improving the mechanical properties of the casting.

[0015] (2) In this scheme, by setting up a cooling platform made of cast iron material, when the temperature of the casting is high and the temperature of the casting sand box and furan resin sand rises, the heat generated can be quickly transferred to the ground and taken away through the cooling method of heat transfer, thereby improving its heat dissipation effect.

[0016] (3) This solution, through the setting of the heat dissipation groove, can ensure that the cooling platform has a good exhaust capacity when the casting sand box continuously generates a large amount of high-temperature gas during the pouring and solidification process, and can ensure that a large amount of heat is quickly transferred from the heat dissipation groove to the surrounding atmosphere, so as to achieve the purpose of cooling the casting inside the sand box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 For the utility model Figure 1 Schematic diagram of the enlarged structure at position A in the middle.

[0020] Description of the numbers in the figure:

[0021] 1. Cooling platform;

[0022] 2. Casting sand box;

[0023] 3. S-type platform cooling pipe;

[0024] 4. Sand box heat dissipation pipe;

[0025] 5. Heat absorbing hole;

[0026] 6. Flat plate heat sink;

[0027] 7. Ductile iron castings;

[0028] 8. Pouring channel;

[0029] 9. Furan resin sand. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model. Example

[0031] See also Figure 1-3 A cooling platform specially used for ductile iron production includes a cooling platform 1 and a casting sand box 2 installed on the top of the cooling platform 1. Two groups of S-shaped platform cooling pipes 3 are arranged inside the cooling platform 1. A plurality of sand box heat dissipation pipes 4 are connected above the S-shaped platform cooling pipes 3. The top of the sand box heat dissipation pipes 4 extends to the inner cavity of the casting sand box 2, and a plurality of heat absorbing holes 5 are opened on the outer periphery of the extended end. A plurality of flat plate heat dissipation grooves 6 are opened on the top surface of the cooling platform 1.

[0032] See also Figure 1 The inner cavity of the casting sand box 2 is provided with a ductile iron casting 7, and the ductile iron casting 7 is provided with a pouring channel 8, and one end of the pouring channel 8 extends to the outside of the casting sand box 2.

[0033] See also Figure 1 The inner cavity of the casting sand box 2 is filled with furan resin sand 9, and the furan resin sand 9 wraps the ductile iron casting 7.

[0034] See also Figure 2 The two ends of the S-type platform cooling pipe 3 are respectively provided with an air inlet end and an air outlet end. The air inlet end and the air outlet end of the S-type platform cooling pipe 3 have the same structure and extend to the two ends of the cooling platform 1 respectively. When in use, in order to prevent the cooling gas from directly rushing into the casting sand box 2, causing sudden cooling and causing the casting sand box 2 to explode, the air inlet end and the air outlet end of the S-type platform cooling pipe 3 are the same. The cooling gas quickly passes through the sand box heat dissipation pipe 4, forming a negative pressure area at its bottom, driving the high-temperature gas entering from the upper heat absorption hole 5 to flow rapidly downward until it enters the S-type platform cooling pipe 3 and flows out, while taking away the heat in the casting sand box 2.

[0035] See also Figure 1 The extended end of the sand box heat dissipation pipeline 4 is staggered with the pouring channel 8.

[0036] See also Figure 2 Both ends of the flat plate heat dissipation groove 6 penetrate the cooling platform 1, ensuring that the cooling platform 1 has a good exhaust capacity, and can ensure that a large amount of heat is quickly transferred from the flat plate heat dissipation groove 6 to the surrounding atmosphere, so as to achieve the purpose of cooling the ductile iron casting 7 inside the casting sand box 2.

[0037] See also Figure 1 and Figure 2 , the cooling platform 1 is a cast iron plate structure.

[0038] When in use: after the casting mold is produced and the furan resin sand 9 is solidified, casting begins: high-temperature 1380℃-1400℃ molten iron enters the foam mold along the pouring channel 8, and the high-temperature molten iron melts and burns the foam to obtain a high-temperature ductile iron casting 7. A large amount of high-temperature flammable gas will be generated during the casting process, accompanied by violent combustion or explosion. Therefore, in order to prevent the furan resin sand 9 from cracking and causing the high-temperature molten iron to leak out, the furan resin sand 9 is protected and fixed with an iron casting sand box 2.

[0039] Two groups of S-shaped platform cooling pipes 3 are built in the middle of the cooling platform 1. The compressed cooling gas inside the pipe runs in the direction shown in the figure. A sand box heat dissipation pipe 4 is arranged above the S-shaped platform cooling pipe 3, extending upward into the casting sand box 2. The sand box heat dissipation pipe 4 avoids the pouring channel 8, and the center distance is kept above 200mm. The top of the sand box heat dissipation pipe 4 extends to about 50mm from the surface of the ductile iron casting 7. The concave heat dissipation difficult structure of the ductile iron casting 7 or other structures with special technical requirements are selected, and the heat dissipation holes 5 in the top area of ​​the sand box heat dissipation pipe 4 are used to make the heat emitted by the ductile iron casting 7 enter the sand box heat dissipation pipe 4 through the heat absorption holes 5, and quickly discharge to the outside of the casting sand box 2 to achieve the purpose of rapid cooling of the casting structure.

[0040] At the same time, the flat heat dissipation groove 6 arranged on the upper part of the cooling platform 1 can quickly diffuse the high-temperature gas discharged from the casting sand box 2 out of the bottom of the casting sand box 2. At the same time, the cooling platform 1 is made of cast iron material, which has good thermal conductivity and load-bearing capacity, further improving the heat dissipation and cooling effect of the casting.

[0041] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A cooling platform specially used for ductile iron production, comprising a cooling platform (1) and a casting sand box (2) mounted on the top of the cooling platform (1), characterized in that: Two groups of S-shaped platform cooling pipes (3) are arranged inside the cooling platform (1); a plurality of sand box heat dissipation pipes (4) are connected to the top of the S-shaped platform cooling pipes (3); the top of the sand box heat dissipation pipes (4) extends to the inner cavity of the casting sand box (2); and a plurality of heat absorption holes (5) are provided on the outer periphery of the extended end; and a plurality of flat plate heat dissipation grooves (6) are provided on the top surface of the cooling platform (1).

2. A cooling platform specially used for ductile iron production according to claim 1, characterized in that: The inner cavity of the casting sand box (2) is provided with a ductile iron casting (7), and the ductile iron casting (7) is provided with a pouring channel (8), and one end of the pouring channel (8) extends to the outside of the casting sand box (2).

3. A cooling platform specially used for ductile iron production according to claim 1, characterized in that: The inner cavity of the casting sand box (2) is filled with furan resin sand (9), and the furan resin sand (9) wraps the ductile iron casting (7).

4. A cooling platform specially used for ductile iron production according to claim 1, characterized in that: An air inlet end and an air outlet end are respectively provided at both ends of the S-shaped platform cooling pipeline (3); the air inlet end and the air outlet end of the S-shaped platform cooling pipeline (3) have the same structure and extend to both ends of the cooling platform (1) respectively.

5. The cooling platform specially used for ductile iron production according to claim 1, characterized in that: The extended end of the sand box heat dissipation pipeline (4) is staggered with the pouring channel (8).

6. A cooling platform specially used for ductile iron production according to claim 1, characterized in that: Both ends of the flat plate heat dissipation groove (6) penetrate the cooling platform (1).

7. The cooling platform specially used for ductile iron production according to claim 1, characterized in that: The cooling platform (1) is a cast iron plate structure.

Images