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Volute casting casting method for nuclear power station

A technology for nuclear power plants and volutes, which is applied to casting molding equipment, casting molds, and casting mold components. It can solve problems such as difficulty in casting molding, and achieve the effects of reducing impurity content, preventing splash turbulence, and internal compactness

Inactive Publication Date: 2021-02-26
遵义拓特铸锻有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention intends to provide a casting method for volute castings for nuclear power plants to solve the problems in the prior art that casting molding is difficult and defects such as sticky sand, pores, cracks, shrinkage cavities, and sand inclusions are easily produced

Method used

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  • Volute casting casting method for nuclear power station
  • Volute casting casting method for nuclear power station
  • Volute casting casting method for nuclear power station

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Embodiment Construction

[0019] The following is further described in detail through specific implementation methods:

[0020] The reference signs in the drawings of the specification include: No. 1 open riser 1, No. 2 dark riser 2, air hole 3, No. 6 riser 4, core skeleton 5, cold iron 6, annular runner 7, No. 4 dark riser 8, No. 5 dark riser 9, inner runner 10, and No. 3 dark riser 11.

[0021] The specific implementation process is as follows: a method for casting a volute casting for a nuclear power plant, comprising the following steps: Step 1, such as figure 1 , make a model according to the shape of the volute. The model is composed of an upper box plate mold, a lower box plate mold and a sand core sand box mold; use the upper box plate mold and the lower box plate mold to make the outer mold sand mold respectively, and use mud The core sand mold box mold is used to make clay core sand molds, the outer mold sand mold is made of alkali phenolic resin sand, and the mud core sand mold is made of p...

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Abstract

The invention discloses a volute casting casting method for a nuclear power station, and belongs to the technical field of fluid conveying equipment casting. The method comprises the following steps that 1, a model is manufactured according to the shape of a volute, the model is composed of an upper box-shaped plate mold, a lower box-shaped plate mold and a loam core sand mold box mold, the upperbox-shaped plate mold and the lower box-shaped plate mold are used for manufacturing outer mold sand molds correspondingly, the loam core sand mold box mold is used for manufacturing a loam core sandmold, a blind riser is formed in the middle of the outer mold sand mold manufactured by the upper box-shaped plate mold, four open risers are formed in the circumferential direction of the outer moldsand mold, eight blind risers are evenly formed in the outer mold sand mold manufactured by the lower box-shaped plate mold at intervals in the circumferential direction, the outer mold sand mold is further provided with an annular cross gate, and ingates are communicated between the six blind risers and the annular cross gate; 2, the outer mold sand mold and the loam core sand mold are subjectedto mold assembling, and then casting is conducted; 3, shakeout and cleaning are conducted after casting is completed. Through the above steps, a casting product which is compact in interior and high in size precision is obtained.

Description

technical field [0001] The invention relates to the technical field of casting of fluid conveying equipment, in particular to a casting method of a volute casting for a nuclear power plant. Background technique [0002] The volute casting is one of the key components of the safety injection pump used in the medium pressure water reactor of the nuclear power plant, such as figure 1 and figure 2 As shown, the shape and structure of the casting is relatively complex, the wall thickness of the flow channel is uneven, the casting molding is difficult, and defects such as sand sticking, pores, cracks, shrinkage cavities, and sand inclusions are easily produced. Therefore, after long-term production practice, the applicant adopts a new casting process method to solve the above-mentioned defects of the volute in the casting process, and realize a casting product with a dense interior and high dimensional accuracy. Contents of the invention [0003] The present invention intends...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C9/22B22C9/08B22C9/10
CPCB22C9/02B22C9/22B22C9/082B22C9/088B22C9/108
Inventor 杨明进王中亚毛全隆谢华
Owner 遵义拓特铸锻有限公司
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