Composite suppressing end plug

Abstract

The invention discloses a composite suppressing end plug which comprises a socket end plug (1) and a bearing opening end plug (7). On the socket end plug (1), at the position from the socket diameter larger than a minimum diameter cast pipe (6) to the socket diameter smaller than a maximum diameter cast pipe (5), a plurality of cavity holes are formed in the radial direction; and the cavity holes are connected with a socket inlet (2) and an air inlet pipe. On the bearing opening end plug (7), at the position from the bearing opening diameter larger than the minimum diameter cast pipe (6) and the bearing opening diameter smaller than the maximum diameter cast pipe (5), a plurality of cavity holes are formed in the radial direction; and the cavity holes are connected with a bearing opening and an air inlet pipe (10). By means of the above technical scheme, as the composite suppressing end plug has the good universality, the problem in remodeling of multi-specification middle pipes in suppressing tests are basically solved; during cast iron pipe continuous passing, the aim of avoiding suppressing end plug replacement is achieved; and by means of the non-remolding manner, the passing yield is improved by two to three times.

Description

technical field [0001] The invention belongs to the technical field of production process equipment for ductile iron pipes, and relates to pressure detection technology for cast pipes. More specifically, the present invention relates to composite compression end plugs. Background technique [0002] In the prior art, during the hydrostatic pressure test, the pressure end plugs generally can only be used for cast iron pipes of one or two specifications. [0003] When the pipe type changes, it is necessary to replace the socket and socket end plug of the corresponding specification. Each replacement needs to consume manpower, material resources and time. It is very troublesome for the situation of mixing lines. In a continuous production line, this defect becomes the main reason for the low efficiency of cast pipe production. [0004] When the covered pipe types are multiplied, in the case of limited space, the functions of sealing and water intake and exhaust must be guara...

AI Technical Summary

Problems solved by technology

In continuous production lines, this defect is the most important cause of inefficiency in the production of cast pipes

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