CN215891489U

CN215891489U - A tongue-and-groove face flange structure for pressing from both sides cover pipeline

Info

Publication number: CN215891489U
Application number: CN202120680154.5U
Authority: CN
Inventors: 闫宗宝; 李进良; 刘宇航; 郭卫疆
Original assignee: Hualu Engineering and Technology Co Ltd
Current assignee: Hualu Engineering and Technology Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2022-02-22
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to a special mortise face flange structure for a jacketed pipeline. A groove is processed at the neck part of a standard neck butt welding mortise face flange, two butt welding end parts are formed at two sides of the groove and are respectively connected with a reducing pipe of a jacket inner pipe and a jacket outer pipe, and the standard neck butt welding mortise face flange is connected with a standard mortise face valve. The utility model has simple structure and convenient manufacture, solves the problem that the conventional jacket flange and the valve can be used for jacket pipelines only by enlarging the size of the flange disc, and adopts the standard valve when the flange is connected with the valve, thereby greatly saving the cost of the valve without enlarging the flange disc of the valve.

Description

A tongue-and-groove face flange structure for pressing from both sides cover pipeline

Technical Field

The utility model relates to a special mortise face flange structure for a jacketed pipeline.

Background

Many pipelines with high toxicity in chemical devices are provided with a nitrogen jacket outside the pipeline for avoiding damage caused by pipeline leakage, the jacket inner pipe can play a role in preventing leakage to the outside through the jacket outer pipe after leakage, and the leakage of the inner pipe can be monitored through the pressure change of the jacket outer pipe. A conventional jacket pipeline tongue-and-groove face flange valve connection structure is shown in fig. 1. The tenon (groove) face jacket flange on the pipeline is connected with the groove (tenon) face jacket flange on the valve through a gasket and a bolt nut. The flange of the jacket flange needs to be enlarged in size so as to be connected with the jacket inner pipe and the jacket outer pipe simultaneously. And the flange of the valve connected with the flange can be connected with the jacket flange on the pipeline according to the jacket flange. This has a significant impact on the cost of the valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a special mortise face flange structure for a jacketed pipeline. The utility model has simple structure and convenient manufacture, solves the problem that the conventional jacket flange and the valve can be used for jacket pipelines only by enlarging the size of the flange disc, and adopts the standard valve when the flange is connected with the valve without enlarging the flange disc of the valve, thereby greatly saving the cost of the valve.

The technical scheme of the utility model is as follows: a mortise face flange structure for a jacket pipeline comprises a jacket outer pipe, a jacket inner pipe, a neck butt welding mortise face flange, a mortise face valve, a gasket, a bolt and a nut; the method is characterized in that: the front end of the jacket outer pipe is designed into a reducing pipe; a groove is designed at the neck part of the flange with the neck butt welding mortise face, two butt welding end parts are formed on two sides of the groove and are respectively connected with the inner pipe of the jacket and the reducing pipe of the outer pipe of the jacket, and the flange with the neck butt welding mortise face, the valve with the mortise face and the gasket are connected through bolts and nuts.

The utility model provides a tongue-and-groove face flange structure for pressing from both sides cover pipeline which characterized in that: the jacket inner tube is welded to the first butt welding end.

The utility model provides a tenon face flange structure for pressing from both sides cover pipeline which characterized in that: and welding the reducing pipe of the outer pipe of the jacket with the second welding end part.

The utility model provides a tongue-and-groove face flange structure for pressing from both sides cover pipeline which characterized in that: the gasket is connected with the tongue-and-groove face flange and the groove-and-tongue face valve through the pretightening force of the two flanges to realize sealing.

The utility model has simple structure and convenient manufacture, solves the problem that the conventional jacket flange and the valve can be used for jacket pipelines only by enlarging the size of the flange disc, and adopts the standard valve when the flange is connected with the valve, thereby greatly saving the cost of the valve without enlarging the flange disc of the valve.

Drawings

FIG. 1 is a schematic view of a conventional jacketed pipe connection;

FIG. 2 is a schematic view of a jacketed pipe connection according to the present invention;

fig. 3 is a detail view of the special tongue (groove) face flange of fig. 2.

Reference is made to the accompanying drawings in which: 1-nut, 2-bolt, 3-gasket, 4-standard mortise and tenon face valve, 5-jacket outer pipe reducing pipe, 6-jacket inner pipe, 7-standard neck butt welding mortise and tenon face flange, 8-jacket outer pipe, 9-groove, 10-first butt welding end part and 11-second butt welding end part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1, the mortise face flange structure for a jacket pipeline according to the present invention includes a jacket outer pipe 8, a jacket inner pipe 6, a standard neck butt welding mortise face flange 7, a standard mortise face valve 4, a gasket 3, a bolt 2, and a nut 1; a groove 9 is processed at the neck part of a standard neck butt welding tenon (groove) face flange 7, two butt welding end parts are formed on two sides of the groove and are respectively connected with a jacket inner pipe 6 and a jacket outer pipe reducing pipe 5, and the standard neck butt welding tenon (groove) face flange 7 is connected with a standard groove (tenon) face valve 4.

The jacket inner tube 6 is welded to a first butt welding end 10.

The jacket outer pipe reducing pipe 5 and the second butt welding end part 11 are welded.

The gasket 3 is connected with a standard neck butt welding tenon (groove) surface flange 7 and a standard groove (tenon) surface valve 4 through the pretightening force of the two flanges to realize sealing.

Claims

1. A mortise face flange structure for a jacket pipeline comprises a jacket outer pipe (8), a jacket inner pipe (6), a neck butt welding mortise face flange (7), a mortise face valve (4), a gasket (3), a bolt (2) and a nut (1); the method is characterized in that: the front end of the jacket outer pipe (8) is designed into a reducing pipe (5); a groove (9) is designed at the neck part of a flange (7) with a neck butt welding mortise surface, two butt welding end parts are formed at two sides of the groove (9), and the two butt welding end parts are respectively connected with a jacket inner pipe (6) and a jacket outer pipe reducing pipe (5); the neck butt welding tenon groove face flange (7) is connected with the tenon groove face valve (4).

2. A tongue and groove face flange structure for jacketed pipelines according to claim 1, wherein: the jacket inner tube (6) is welded to the first butt welding end (10).

3. A tongue and groove face flange structure for jacketed pipelines according to claim 1, wherein: the reducing pipe (5) of the outer pipe of the jacket is welded with the second butt welding end part (11).

4. A tongue and groove face flange structure for jacketed pipelines according to claim 1, wherein: the gasket (3) is connected with the neck butt welding tenon groove face flange (7) and the tenon groove face valve (4) through the pretightening force of the two flanges to realize sealing.