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Bow ring seal gasket and bow ring seal tube connector

A pipe connector and bow-shaped technology, which is applied in the field of chemical machinery, can solve the problems of high processing precision, non-reusable, unsuitable for live joints, etc., and achieve the effect of reducing the installation period, saving steel, and convenient installation of pipe connectors

Active Publication Date: 2020-12-22
杨顺立
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oval ring gasket is in line contact with the flange groove, and the sealing performance is good, but the processing accuracy is high, and it cannot be reused
Since the elliptical gasket and the octagonal ring are double-sided sealed, they are not suitable for unions.

Method used

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  • Bow ring seal gasket and bow ring seal tube connector
  • Bow ring seal gasket and bow ring seal tube connector
  • Bow ring seal gasket and bow ring seal tube connector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] DN25PN63 union, the gasket is A1 type bow ring, see figure 1 , 10 , R=15mm, α=23°, h=14mm, h1=2mm, and other dimensions are the same as DN25 triangular ring joints, see Chinese Patent Nos. 201320856527.5 and 20152024387.0 for details. The material of bow ring, joint and connection pipe is stainless steel 304, and the material of nut is 20# carbon steel galvanized. 0.5m φ32×3 steel pipes are welded on the connecting pipes and joints. Tighten the gland, pressurize the ferrule valve to 10MPa with a nitrogen cylinder, close the ferrule valve, and remove the connecting pipe between the nitrogen cylinder and the ferrule valve. Immerse the union in water and observe for 10 minutes, there are no air bubbles. After standing for 5 hours, the pressure did not change. Proof.

Embodiment 2

[0060] DN25PN63 joint, the gasket is B1-type bow ring ( image 3 ), α=23°, β=21°, R 1 = 1.6, R 2 = 1, the rest are the same as example 1, see installation Figure 11 . The material of bow ring, joint and connection pipe is stainless steel 304, and the material of nut is 20# carbon steel galvanized. Connect the union as in Example 1, pressurize with a manual pressure test pump, enter water to 20MPa, and close the ferrule valve. After observing for 5 hours, no water seeped out and the pressure did not change.

Embodiment 3

[0062] DN25PN25 union, the gasket is a C-shaped bow ring ( Figure 6 ), α=60°, β=57°, R 1 =0.5, see the connecting pipe, joint sealing surface and installation Figure 13 . The material of joints, pipes and nuts is galvanized 20# carbon steel, and the material of the bow ring is carbon fiber reinforced polytetrafluoroethylene. Connect the union as in Example 1, pressurize with a manual pressure test pump, enter water to 5MPa, and close the ferrule valve. After observing for 5 hours, no water seeped out and the pressure did not change.

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Abstract

Provided is an annular hard sealing washer having a bow-shaped longitudinal section. A circular arc portion of the bow-shaped cross-section faces outwards. A sealing line is arranged at the circular arc portion. A line corresponding to a bowstring is parallel to a tube. An annular protruding platform is provided at a position corresponding to a bow grip at the longitudinal section. The sealing washer adopts a circular-arc-shaped line for sealing, opposite to the configuration of a keystone-shaped sealing system. When applied in a flange, the annular sealing washer does not need a positioning platform, nor does the flange need a positioning recess. The annular sealing washer having a bow-shaped longitudinal section is particularly suitable for sealing a flange.

Description

technical field [0001] The invention relates to a seal, which belongs to the field of chemical machinery, in particular to a bow-shaped ring hard sealing gasket for pipeline connection, a welded pipe connection matched with a bow-shaped ring, including a flange, a clamp height Neck flanges and joints, the sealing surface of the pipe connection is an inclined surface (inner cone surface). Background technique [0002] In industry, especially in the chemical industry, flanges are widely used in pipeline connections. For small-diameter pipes below DN65, it is not necessary to use flanges for connection, but unions should be used. The weight of unions is only 1 / 5 to 1 / 3 of that of flanges, and the price of a union is only about half of the price of a pair of flanges. The pipe connection uses a union, which not only saves steel, has low cost, but also is easy to install. Galvanized joints are used for water pipes. Because the wires are easy to leak and gaskets (asbestos or rubb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L23/032F16L23/024F16L23/18
CPCF16L23/024F16L23/032F16L23/18
Inventor 杨顺立陈功郭霞将马方林
Owner 杨顺立
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