Universal joint

A general-purpose joint and bolt technology, applied in the direction of pipe/pipe joint/pipe fitting, passing element, sealing surface connection, etc., can solve the problems of poor sealing performance, achieve good sealing performance, ideal structural design, and convenient disassembly and assembly.

Inactive Publication Date: 2013-12-25
NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the problem of poor sealing of the pipeline joints used in the chromatograph, and invents a new type of universal joint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention is used for the connection of gas chromatography gas pipelines:

[0022] The thick plastic tube (7) led from the gas cylinder is put on one end of the smooth tube of the bolt (1), and then the sealing ferrule (a) is put on the plastic pipe (7), so that the sealing ferrule (a) is stuck on the screw thread in the curved groove on the end, then tighten the jam nut (A).

[0023] Put the gas chromatographic gas source inlet plastic pipe joint (8) on the support tube (4), then penetrate the sealing ferrule (b), and insert the threaded end of the bolt (1), so that the sealing ferrule is stuck on the bolt (1 ) in the tapered groove, tighten with the lock nut (B), and the connection between the thick tube and the thin tube is completed.

[0024] The joint can withstand 2.5MPa pressure during use without loosening and shifting.

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PUM

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Abstract

The invention discloses a universal joint for pipelines. The joint disclosed by the invention comprises a joint bolt (1), nonmetallic seal snapping sleeves (a and b), lock nuts (A and B) and a supporting tube (4), wherein the joint bolt (1) is a hollow bolt, the two ends of the joint bolt are different in outside diameter and are provided with external threads, the portion before a coarse threaded end is of a smooth stainless-steel tube section, an arc-shaped groove is formed in the end part of the coarse threaded end, and a conical groove is formed in the end part of a fine threaded end; the seal snapping sleeves (a and b) are made of nylon materials. The universal joint disclosed by the invention is applicable to the connection between any two pipelines of different outside diameter sizes.

Description

technical field [0001] The invention relates to the field of analysis and detection equipment, in particular to a joint for connecting a chromatograph and a gas pipeline. Background technique [0002] Connectors are a common accessory in chromatographic instruments. When using gas chromatography for analysis, it is often necessary to select different chromatograms according to the type and performance of the sample. Therefore, the joints connected to the chromatogram are parts that need to be assembled and disassembled repeatedly. At the same time, in order to achieve good analysis results, good sealing performance of the joints is required, and the volume of the joints is small. The traditional connection is just a pull-out ferrule, the sealing effect is not good, it is easy to be damaged, and it will cause serious damage to the trachea. Contents of the invention [0003] The invention aims at the problem of poor sealing performance of the pipe joint used in the chromato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L19/02
Inventor 孙永良邹启榆马丽慧杨晓丽
Owner NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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