Hollowed-out pipe orifice shrinking device

Abstract

The invention relates to a hollowed-out pipe orifice shrinking device. The device comprises a fixing seat, a driving body and a pipe shrinking mold, wherein the driving body and the pipe shrinking mold are arranged inside the fixing seat, the fixing seat comprises a cylindrical main body, a guide flange plate and a sealing end plate which are fixed at the two ends of the main body correspondingly,the driving body comprises a front-section cylindrical driving head and a rear-section cylindrical sliding tail, the pipe shrinking mold comprises N-numbered sector-shaped single pipe shrinking bodies with the inner arc surfaces and the outer arc surfaces, each single pipe shrinking body comprises a single mold base body and a single mold body used for shrinking pipes, every two single pipe shrinking bodies are supported by springs, the guide flange plate is fixed on the main body by the bolts sleeving sleeves, so that a circle of hollowed-out area is formed between the guide flange plate andthe main body, so that falling objects such as slag skin can be conveniently removed during the pipe shrinking process, and are prevented from being accumulated in the device, and different single mold bodies can be selected according to the pipe diameter.

Description

technical field [0001] The invention relates to the technical field of pipe fitting processing equipment, in particular to a hollowed-out nozzle shrinking device. Background technique [0002] The nozzle shrinking device is the head part of the pipe shrinking machine, which is the key actuator to complete the nozzle shrinking. The nozzle shrinking device is to uniformly reduce the outer diameter of one end of the steel pipe to a certain length, and is used for the connection between multiple steel pipes. Or other forms of connection, because the sizes of steel pipes used in different situations are not the same, which requires different nozzle constriction devices to correspond to them, so this type of nozzle constriction device has a single function and poor adaptability, and increases equipment costs. At the same time, the external structure of the nozzle shrinking device in the prior art is a ring-shaped whole, and the interior is the executive part of the shrinking nozzl...

AI Technical Summary

Problems solved by technology

[0002] The nozzle shrinking device is the head part of the pipe shrinking machine, which is the key actuator to complete the nozzle shrinking. The nozzle shrinking device is to uniformly reduce the outer diameter of one end of the steel pipe to a certain length, and is used for the connection between multiple steel pipes. Or other forms of connection, because the sizes of steel pipes used in different situations are not the same, which requires different nozzle constriction devices to correspond to them, so this type of nozzle constriction device has a single function and poor adaptability, and increases equipment costs. At the same time, the external structure of the nozzle shrinking device in the prior art is a ring-shaped whole, and the interior is the executive part of the shrinking nozzle, which leads to the fact that the slag skin and other wastes that fall off the steel pipe head cannot fall out in time when the nozzle shrinks. Nozzle shrinking device, especially for those old steel pipes that have been used for a period of time. The surface of this type of steel pipe will accumulate some construction waste such as cement lime that has not been cleaned in time. After long-term accumulation, it will solidify on the surface of the steel pipe with the corrosion of the steel pipe. Difficult to clean up. When this type of steel pipe shrinking is performed, more slag will inevitably be produced, and the shed slag cannot be discharged from the nozzle shrinking device in time, and the slag will accumulate in the nozzle shrinking device, seriously affecting the device. It can be used normally or even unusable, which will increase equipment maintenance costs and reduce the efficiency of processing and production. Therefore, it is urgent to make a technical breakthrough on the existing nozzle shrinking device.

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