CN108644501B - Flange assembly type large-caliber high-pressure pipeline connecting device - Google Patents

Abstract

The invention relates to the technical field of pipeline construction, and in particular to a flange-assembled large-diameter high-pressure pipeline connection device. It includes a first pipe, a second pipe, a first positioning sleeve, a second positioning sleeve, a sealing ring, a first flange and a second flange; a sealing groove is provided at the end of the first pipe, and the sealing ring is placed in the sealing groove; A first groove is provided on the outside of the first pipe and the second pipe, a second groove is provided on the outside of the first flange and the second flange, and the first positioning sleeve and the second positioning sleeve are provided with a matching first groove. The first protrusion and the second protrusion are adapted to the second groove; the first flange and the second flange are sleeved on the outside of the first pipe and the second pipe, connected by bolts, and provide axial preset for the pipe. The tightening force compresses the sealing ring; the positioning sleeve is placed in the groove through its protrusion to position the pipe and flange. It improves construction efficiency, is energy-saving and environmentally friendly, has good sealing performance, is suitable for high-pressure pipeline systems, is easy to operate, has low cost, and is suitable for pipes with larger diameters.

Description

A flange-assembled large-diameter high-pressure pipeline connection device

Technical field

The invention relates to the technical field of pipeline construction, and in particular to a flange-assembled large-diameter high-pressure pipeline connection device.

Background technique

With the development of society and the advancement of science and technology, the construction and installation industry has also developed greatly. Prefabricated buildings have attracted more and more attention due to their low pollution, energy saving, environmental protection, and high efficiency. It is gradually emerging.

Prefabricated pipelines reduce the complexity of the pipeline construction process. No welding is required at the construction site, and the pipeline system only requires prefabricated assembly, which greatly improves construction efficiency and shortens the construction period. The pipeline system has a reasonable layout and good integrity, which greatly reduces the number of interfaces and reduces the risk of leakage in the pipeline system. However, existing fabricated pipelines generally adopt groove connection methods, which have poor sealing properties and can only be applied to low-pressure pipeline systems such as fire-fighting water, and cannot be applied to high-pressure pipeline systems such as hydraulic pressure.

Contents of the invention

In order to overcome the shortcomings of the prior art, the present invention provides a flange-assembled large-diameter high-pressure pipeline connection device. It adopts prefabricated assembly without welding, which improves construction efficiency; at the same time, it has good sealing performance and is suitable for high-pressure pipeline systems.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A flange-assembled large-diameter high-pressure pipeline connection device, including a first pipe, a second pipe, a first positioning sleeve, a second positioning sleeve, a sealing ring, a first flange and a second flange; the first pipe A sealing groove is provided at the end, and the sealing ring is placed in the sealing groove; a first groove is provided outside the first pipe and the second pipe, a second groove is provided outside the first flange and the second flange, and the first positioning The sleeve and the second positioning sleeve are provided with a first protrusion adapted to the first groove and a second protrusion adapted to the second groove; the first flange and the second flange are sleeved between the first pipe and the second flange. The outside of the second pipe is connected by bolts, and provides axial pre-tightening force for the pipe to compress the sealing ring; the positioning sleeve is placed in the groove through its protrusion to position and connect the pipe to the flange.

The inner and outer diameters of the first pipe and the second pipe are the same, and the flange joint surface and the pipe joint end surface are arranged in an offset manner.

The first positioning sleeve and the second positioning sleeve have the same structure and are split annular sleeves. Each part is connected by bolts to form a circular sleeve.

The beneficial effects of the present invention are:

(1) It is equipped with a sealing groove, and the sealing ring is pressed tightly through the end of the pipeline, which has good sealing performance and is suitable for assembled high-pressure pipeline systems;

(2) It adopts prefabricated assembly without welding, which reduces the complexity of the construction process and improves construction efficiency;

(3) Pipes are connected to flanges through positioning sleeves. Compared with threaded connections, flange connections are simple to install and cost-effective, and are suitable for pipes with larger diameters.

Description of the drawings

Figure 1 is a schematic front cross-sectional view of the structure of the present invention;

Figure 2 is a schematic side cross-sectional view of the structure of the present invention;

Figure 3 is a schematic top view of the structure of the present invention;

Figure 4 is a schematic front cross-sectional view of the structure of the first flange and the second flange of the present invention;

Figure 5 is a schematic side view of the first flange and second flange structures of the present invention;

Figure 6 is a schematic front cross-sectional view of the structure of the first positioning sleeve and the second positioning sleeve of the present invention;

Figure 7 is a schematic side cross-sectional view of the structure of the first positioning sleeve and the second positioning sleeve of the present invention.

In the picture: 1-First pipe 2-Second pipe 3-First positioning sleeve 4-Second positioning sleeve 5-Sealing ring 6-First flange 7-Second flange 8-Sealing groove 9-First groove Groove 10 - second groove 11 - first protrusion 12 - second protrusion 13 - upper positioning sleeve 14 - lower positioning sleeve 15 - flange 16 - sleeve

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figures 1, 2, and 3, a flange-assembled large-diameter high-pressure pipeline connection device includes a first pipe 1, a second pipe 2, a first positioning sleeve 3, a second positioning sleeve 4, and a sealing ring. 5. The first flange 6 and the second flange 7.

The inner and outer diameters of the first pipe 1 and the second pipe 2 are the same. The first pipe 1 and the second pipe 2 are both provided with first grooves 9 on the outside. The end of the first pipe 1 is provided with a sealing ring 5 Matching sealing groove 8.

As shown in Figures 4 and 5, the first flange 6 and the second flange 7 have the same structure and are composed of a flange plate 15 and a sleeve 16. The sleeve 16 is provided with a second groove 10 on the outside. The plate 15 has a flange structure, and 6 bolt holes for bolt connections are evenly distributed on the flange plate 15.

As shown in Figures 6 and 7, the first positioning sleeve 3 and the second positioning sleeve 4 have the same structure and are partial annular sleeves. They are composed of an upper positioning sleeve 13 and a lower positioning sleeve 14. The upper positioning sleeve 13 and the lower positioning sleeve The positioning sleeve 14 is provided with bolt holes, and the upper positioning sleeve 13 and the lower positioning sleeve 14 are connected by bolts to form a circular sleeve.

As shown in Figures 1, 2, and 3, the installation process of the present invention is:

(1) Put the first flange 6 into the end of the first pipe 1, and use the first positioning sleeve 3 to connect and position the first flange 6 with the first pipe. The first protrusion 11 is placed in the first groove 9 Inside, the second protrusion 12 is placed in the second groove 10 .

(2) Put the second flange 7 into the end of the first pipe 2, and use the second positioning sleeve 4 to connect and position the second flange 7 with the first pipe. The first protrusion 11 is placed in the first groove 9 Inside, the second protrusion 12 is placed in the second groove 10 .

(3) Place the sealing ring 5 in the sealing groove 8;

(4) Place the end faces of the first pipe 1 and the second pipe 2 opposite each other and align them;

(5) Connect the first flange 6 and the second flange 7 with bolts to bring the end faces of the first pipe 1 and the second pipe 2 closer to each other, and press the sealing ring 5 tightly so that the first pipe 1 and the second pipe 2Two sections of pipeline are sealed and connected.

The invention adopts prefabricated assembly without welding, thereby reducing the complexity of the construction process and improving construction efficiency. It is equipped with a sealing ring, which is pressed tightly by tightening the flange bolts. It has good sealing performance and is suitable for high-pressure pipeline systems. Pipes are connected to flanges through positioning sleeves. Compared with threaded connections, flange connections are simpler to install and less expensive. They are suitable for pipes with larger installation spaces and larger diameters.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation modes and specific operating processes are given. However, the protection scope of the present invention is not limited to the above-mentioned embodiments. Unless otherwise specified, the methods used in the above examples are conventional methods.

Claims (2)

1. A flange assembly type large-caliber high-pressure pipeline connecting device is characterized in that: the device comprises a first pipeline, a second pipeline, a first positioning sleeve, a second positioning sleeve, a sealing ring, a first flange and a second flange; the end part of the first pipeline is provided with a sealing groove, and a sealing ring is arranged in the sealing groove; the first pipeline and the second pipeline are provided with a first groove outside, the first flange and the second flange are provided with a second groove outside, and the first positioning sleeve and the second positioning sleeve are provided with a first bulge matched with the first groove and a second bulge matched with the second groove; the first flange and the second flange are sleeved outside the first pipeline and the second pipeline, are connected through bolts, provide axial pretightening force for the pipelines and compress the sealing ring; the positioning sleeve is arranged in the groove through the bulge of the positioning sleeve to position and connect the pipeline with the flange;

the inner diameter and the outer diameter of the first pipeline are the same as those of the second pipeline, and the flange joint surface and the pipeline joint end surface are arranged in a staggered manner.

2. The flange-mounted large-caliber high-pressure pipeline connecting device according to claim 1, wherein: the first positioning sleeve and the second positioning sleeve have the same structure and are split type circular sleeves, and all parts are connected through bolts to form the circular sleeves.