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Threaded clamping and pressing type pipe structure and using method thereof

A compression-type pipe fitting and thread technology, which is applied in the direction of pipe/pipe joint/pipe fitting, through element, sealing surface connection, etc., can solve the problems of large wear of O-ring rubber ring, loss of rebound ability of gasket, and shortened service life. , to achieve the effect of high tensile strength, excellent temperature resistance and long service life

Pending Publication Date: 2020-12-25
NINGBO TIANSHENG SEALING PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this structure, it is far from enough to improve the mechanical tensile capacity of the pipe joint and the pipe body only by adding a bushing ring inside and outside the clamping part. In the working state, due to the internal pressure of the medium and the The sealing device has the characteristics of self-tightening effect, and the gasket will undergo secondary compression, which will improve the sealing performance to a certain extent; however, with the extension of time and the increase of the number of secondary compressions, the compression of the gasket will continue to approach the compression limit, and will Cause the gasket to lose its rebound ability, cause fatigue failure, and then cause seal failure and medium leakage. In addition, the O-shaped rubber ring used in the air pressure environment wears a lot, resulting in a reduced service life
Aiming at such defects, the inventor has made technical improvements in the patent application with publication number CN 110594501 A. By using packing sealing rings instead of traditional O-shaped rubber sealing rings, the sealing performance is improved and the clamping time is greatly extended. The life of the pressure-type tube assembly has achieved a significant increase in the tensile capacity of the sealed connection, but for a more demanding use environment, its tensile capacity still needs to be further improved to adapt to higher pressure transmission and harsher environmental conditions , and even resist damage to the pipeline structure caused by external force impact

Method used

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  • Threaded clamping and pressing type pipe structure and using method thereof
  • Threaded clamping and pressing type pipe structure and using method thereof
  • Threaded clamping and pressing type pipe structure and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Such as Figure 1-4 As shown, a thread clamping pipe fitting structure includes a joint body 5, a pipe body 1, a nut 6 and a sealing assembly;

[0079] The joint body 5 includes a pipe body accommodation section and a seal assembly accommodation section; the pipe body 1 accommodation section is provided with a positioning spigot, and the seal assembly accommodation section is provided with a seal assembly accommodation cavity; the outer wall of the seal assembly accommodation section is provided with an external thread , the accommodating section of the sealing assembly is threadedly connected with the nut 6; the sealing assembly is placed in the accommodating chamber of the sealing assembly; in the accommodating chamber of the sealing assembly of the joint body 5, along the axial direction of the joint body 5, a cone is set away from the end of the nut 6 section, the seal assembly includes pressure ring 2, packing seal ring 3 and cone ring 4 arranged in sequence; cone ...

Embodiment 2

[0096] Compared with Example 1, it is only different in pipe diameter D, annular groove depth t, and annular groove width d, specifically, as Figure 2-3 As shown, pipe diameter D=32mm, annular groove depth t=0.3mm, annular groove width d=4.0mm, such as Figure 4 As shown, the size of the tapered ring matches the annular groove. Using the same test conditions and standards as in Example 1, the sealing device equipped with a φ32×1.2 pipe body is tested, and it still meets the service conditions under a pulling force of 25kN, and the sealing device has no leakage or falling off.

Embodiment 3

[0098]Compared with Example 1, it is only different in pipe diameter D, annular groove depth t, and annular groove width d, specifically, pipe diameter D=50.8mm, annular groove depth t=0.4mm, annular groove width d=6.0mm, for the performance test of the sealing device after the nut is tightened, the same test conditions and standards as in Example 1 are adopted, and the sealing device equipped with a φ50.8×1.2 pipe body is tested. Meet the conditions of use, and the sealing device has no leakage or falling off.

[0099] For pipes with a pipe diameter between 22-57mm, the sealing device of the present invention is used. After testing, the tensile strength is significantly higher than the standard requirement. The tensile force can reach 150%-200% of the standard requirements. As shown in Table 1, under the test tensile force of 150%-200% of the tensile force standard requirements, the sealing device has no leakage and no shedding. It should be noted that the table The tensile ...

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Abstract

The invention discloses a threaded clamping and pressing type pipe structure. The structure comprises a connector body, a pipe body, a nut and a sealing assembly. The threaded clamping and pressing type pipe structure product is high in tensile capacity, good in pressure resistance, excellent in temperature resistance, flame-retardant, long in service life, safe, environmentally friendly, convenient to install and capable of being repeatedly disassembled and assembled.

Description

technical field [0001] The invention relates to the field of pipeline sealing, in particular to a thread clamping type pipe fitting structure and a use method thereof. Background technique [0002] The new stainless steel pipe connectors are mainly used in the connection and sealing of stainless steel pipe systems for gas transportation, and are also suitable for the transportation of civil low-pressure fluids such as hot and cold water, direct drinking water, heating, air conditioning, and fire protection, as well as industries such as medicine, beverage, food, and chemical industry low pressure fluid transfer. In the prior art, the connection and sealing of stainless steel pipes are usually sealed and connected by compression type, double compression type, clamping type and welding type, but there are many problems in these sealing and connection methods, such as the commonly used rubber ring sealing method There are problems of rubber ring aging, short life, and poor tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L19/02B23P15/00
CPCB23P15/00F16L19/0206F16L19/0218
Inventor 励行根魏世军李征罗文军王宇岳怀燕岑冲励洁励勇
Owner NINGBO TIANSHENG SEALING PACKING
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