Deformation-preventing device for evanescent mode ductile iron pipe fitting bell mouth

Abstract

The invention discloses a deformation-preventing device for an evanescent mode ductile iron pipe fitting bell mouth. The evanescent mode ductile iron pipe fitting bell mouth is in a cylindrical shape. The deformation-preventing device for the evanescent mode ductile iron pipe fitting bell mouth comprises a rotating shaft rod (3), sliding blocks (4) and multiple equally-divided sand rings (1), wherein the multiple equally-divided sand rings (1) are spliced to form a sand ring cylinder. The outer surface of the sand ring cylinder is tightly attached to the inner surface of the evanescent mode ductile iron pipe fitting bell mouth (2), and every two adjacent connected equally-divided sand rings (1) are clamped to each other through the corresponding sliding block (4). Opening grooves matched with the sliding blocks (4) are formed in the two sides of the equally-divided sand rings (1). The rotating shaft rod (3) is arranged in the equally-divided rings (1) in a tapping manner. First clamping teeth are arranged on the sliding blocks (4), and second clamping teeth engaged with the first clamping teeth are arranged on the rotating shaft rod (3) so that the sliding blocks (4) can be driven to slide in the length direction of the opening grooves. According to the deformation-preventing device for the evanescent mode ductile iron pipe fitting bell mouth, the defects that in the prior art, sand rings cannot be well fixed to the end face of a bell mouth, and the size can only be fixed are overcome, and the evanescent mode ductile iron pipe fitting bell mouth can be prevented from deforming.

Description

technical field [0001] The invention relates to an anti-deformation device for a socket of a lost foam ductile iron pipe fitting. Background technique [0002] The lost foam process has replaced the traditional sand casting process as the best production process for ductile iron pipe fittings, but each process has its own shortcomings. The deformation of the socket is a technical difficulty in the production of ductile iron pipe fittings by the lost foam process. [0003] In the existing technology, a furan resin sand ring is added to the end face of the socket. First, the sand ring cannot be well fixed on the end face of the socket, especially when the socket is below during casting, the sand ring is easy to fall off during the molding vibration process. Because the surface supported by the sand ring is too small, only the size of the end face of the socket can be guaranteed to meet the requirements, and the size of the top face cannot be effectively guaranteed. Contents ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-deformation device for the socket of the lost foam ductile iron pipe fittings, which overcomes the problem that the sand ring in the prior art cannot be fixed well on the end face of the socket, and the size can only be fixed, and realizes the problem that the lost foam ball Anti-deformation of socket of iron pipe fittings

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