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Method and device for manufacturing external thread of sealing pipeline and product thereof

A technology for sealing pipes and external threads, applied in threaded products, threaded connections, other household appliances, etc., can solve problems such as gaps, and achieve the effect of improving reliability, strength, performance and reliability.

Active Publication Date: 2009-12-30
SHANGHAI PAN CHINA FASTENING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the distribution of the tolerance zones of the crest height and root height of the sealed pipe thread is arranged according to the transition fit requirements. During assembly, the thread root and crest may contact the flank first, or contact the flank at the same time. It may be late in contact with the tooth side, or there may be no contact between the bottom and the top of the tooth after assembly, and there is a gap

Method used

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  • Method and device for manufacturing external thread of sealing pipeline and product thereof
  • Method and device for manufacturing external thread of sealing pipeline and product thereof
  • Method and device for manufacturing external thread of sealing pipeline and product thereof

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with preferred embodiments. It should be noted that in the following description, although the terms used are selected from well-known and commonly used terms, some terms are used by the applicant according to It is selected according to its judgment, and its detailed meaning should be understood according to the spirit to be disclosed in the present invention.

[0032] Such as figure 1 As shown, the external thread 10 of the sealed pipeline of the present invention is formed at the joint of the pipeline 1, and the external thread 10 of the sealed pipeline is a conical pipe thread, which includes 8 effective threads, figure 1 The shown embodiment is suitable for pipe thread connection under normal circumstances. In the case of aerospace and other fields that require high connection strength of pipe threads, the effective thread of the external thread 10 of the sealed pipe can be 20 threads. Further, ...

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Abstract

The invention relates to an external thread of a sealing pipeline, which can realize sealing without utilizing filler, wherein an effective thread is a thread of a conical tube; the middle of the total length of the effective thread is provided with at least two complete variable convex threads; the intermediate diameter of the variable convex thread is more than the intermediate diameter of a corresponding reference standard taper thread by preset interference fit quantity; and the tooth side of the variable convex thread is outer convex cambered surface. The invention also relates to a method and a device for manufacturing the external thread of the sealing pipeline and a thread pair pipe fitting of a guide-type interference fit pipe.

Description

technical field [0001] The invention relates to an external thread of a sealed pipeline, a manufacturing method thereof, a manufacturing device, and a lead-in interference fit pipe thread auxiliary pipe fitting. Background technique [0002] When using the existing sealing pipe thread to seal the connection, it needs to meet a variety of strict conditions, as pointed out in an article titled "Understanding and Analysis of Pipe Thread Standards" in the third issue of "Aerospace Standardization" in 2005, American sealed pipe thread 60° is divided into two types: general sealed pipe thread and dry sealed pipe thread. The general sealed pipe thread is an economical sealed pipe thread, and sealing packing is added in the threaded auxiliary pipe fitting; while the dry sealed pipe thread requires no It can also be sealed in the case of sealing packing, which belongs to the precision sealing pipe thread. The position distribution of the crest height and root height tolerance zone o...

Claims

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Application Information

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IPC IPC(8): F16L15/06B21H3/06
CPCB21H3/02F16L15/06
Inventor 肖金安周俊
Owner SHANGHAI PAN CHINA FASTENING SYST