CN211315433U

CN211315433U - Reducing pressure pipeline crossover sub

Info

Publication number: CN211315433U
Application number: CN201922357980.1U
Authority: CN
Inventors: 李永鹏; 谢波; 梁斌
Original assignee: China Construction Second Engineering Bureau Co Ltd
Current assignee: China Construction Second Engineering Bureau Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-08-21
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a reducing pressure pipeline adapter, which comprises a reducing pipeline and connecting pieces connected with two ends of the reducing pipeline, wherein each connecting piece comprises a first end ring, a second end ring and a sealing piece; an annular caulking groove is arranged on the first end ring; an annular boss is arranged on the second end ring; a clamping table is arranged at the end part of the reducing pipeline; the clamping table of the reducing pipe can be embedded into the embedding groove of the first end ring; the annular boss of the second end ring can be embedded into the embedding groove of the first end ring; the sealing element is arranged in the caulking groove of the first end ring and is positioned between the clamping platform of the reducing pipe and the annular boss of the second end ring. Compared with the prior art, the utility model discloses pipeline crossover sub realizes the butt joint of pressure test pipeline, and is sealed effectual, and the no leakage has guaranteed the pressure supply efficiency of the pressure test.

Description

Reducing pressure pipeline crossover sub

Technical Field

The utility model relates to a pipe connection device, especially a nuclear power field reactor factory building pressure detection's pipe connection crossover head, "belong to a connector of nuclear power plate factory building pressure detection reducing pipeline".

Background

The containment vessel is the core project of the nuclear power station, and the acceptance of the containment vessel passes strength and sealing tests. After the nuclear power station is built, the containment structure must be tested through an integrity test to evaluate the qualified part to charge and generate electricity, and the containment structure must be tracked, tested, checked and evaluated in the whole period during operation to confirm the safety of the containment structure.

The work content of the containment test is divided into two pieces. Part of this is the work brought about by the test itself: work such as a sealing test, a strength test, an appearance inspection, an inner appearance inspection and the like; another part is developed around the special risks mentioned above: safety setting of system equipment in the reactor before the test, fire-fighting measures, pressure-bearing exercise of personnel and the like.

The containment test aims to verify whether the containment has enough mechanical strength and good sealing performance under working conditions. Therefore, the containment vessel is subjected to two tests, namely a strength test and a sealing test, so as to ensure that a large amount of high-temperature, high-pressure and steam-water mixture with radioactive substances is contained and isolated by the containment vessel when a nuclear reactor has a serious accident, and thus damage to residents and the environment around a nuclear power plant is prevented.

Under this background, the containment is suppressed experimental must be linked to each other outside pressurizing equipment pipeline and factory building interior pipe orifice, because of suppressing equipment all is domestic equipment (atlas diesel oil air compressor machine), and integrated steel pipeline adopts internal diameter DN150 specification, and the EPR nuclear power station is the french design, the steel pipeline that pressure test need adopt, internal diameter DN250, pre-buried in the concrete, need link to each other two steel pipelines, does not have the pipeline crossover sub that can be used to link to each other on the market.

Disclosure of Invention

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art existence, and provide a reducing pipeline under pressure crossover sub that is used for connecting two different diameters of gas tightness after easy to assemble and assurance pipe connection.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a reducing pressure pipeline crossover sub, includes reducing pipeline and connects the connecting piece at reducing pipeline both ends, its characterized in that: the connection includes a first end ring, a second end ring, and a seal; an annular caulking groove is arranged on the first end ring; an annular boss is arranged on the second end ring; a clamping table is arranged at the end part of the reducing pipeline; the clamping table of the reducing pipe can be embedded into the embedding groove of the first end ring; the annular boss of the second end ring can be embedded into the embedding groove of the first end ring; the sealing element is arranged in the caulking groove of the first end ring and is positioned between the clamping platform of the reducing pipe and the annular boss of the second end ring.

And the diameter of the inner hole of the second end ring is the same as that of the inner hole of the reducing pipe.

The sealing element is an annular sealing ring.

The first end ring and the second end ring are secured by a fastener.

Mounting holes for connecting the fasteners are arranged on the first end ring and the second end ring.

Compared with the prior art, the utility model discloses pipeline crossover sub's connecting piece adopts the first end links and the second end links of removable branch to make things convenient for the connection of reducing pipeline and connecting piece. Through set up caulking groove and boss respectively on the end links for the connection of reducing pipeline and connecting piece is reliable, has more guaranteed the gas tightness of connecting, realizes the butt joint of pressure test pipeline, and sealed effectual, the leak-free has guaranteed the pressure supply efficiency of the pressure test.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic diagram of the separation of each part of the present invention.

Wherein: 1. a variable diameter pipeline; 11. clamping a platform; 2. a connecting member; 21. a first end ring; 221. an annular caulking groove; 22. a second end ring; 221. an annular boss; 23. a seal member; 3. and (4) bolts.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

as shown in fig. 1-3, the adapter for pressure reducing pipelines of the present invention comprises a pressure reducing pipeline 1 and connecting pieces 2 connected to both ends of the pressure reducing pipeline. The connection element 2 comprises a first end ring 21, a second end ring 22 and a seal 23. The first end ring 21 is provided with an annular caulking groove 211; an annular boss 221 is provided on the second end ring 22; the clamping platforms 11 are arranged at the end parts (two ends) of the reducing pipeline 1.

When the connecting piece 2 is connected with the reducing pipeline 1, the clamping table 11 of the reducing pipeline is embedded into the embedding groove 211 of the first end ring; the annular boss 221 of the second end ring is also embedded in the embedding groove 211 of the first end ring; the seal 23 is disposed in the caulking groove of the first end ring and between the clamp 11 of the reducer pipe and the annular boss 221 of the second end ring. The end of the reducer pipe 1 is sealingly fixed by the annular boss 221 of the second end ring and the seal 23. The first end ring 21 and the second end ring 22 are fixed by a fastener. Wherein the fastener is a bolt 3.

The inner hole of the second end ring 22 and the inner hole of the reducing pipe 1 have the same diameter. Therefore, the end of the variable diameter pipeline 1 is not obstructed, and the measuring accuracy is ensured.

The sealing element is an annular sealing ring.

The utility model discloses reducing pipeline 1 among the crossover sub, length is in 0.3m ~ 1m, wall thickness 6 mm.

The first end ring 21 and the second end ring 22 of the connecting piece 2 at the small-diameter end have the inner diameter of 150mm, 8 circular mounting holes with the diameter of 22mm are formed, and 8M 20 bolts and nuts are matched. The first end ring 21 and the second end ring 22 of the connecting piece 2 at the large-diameter end have the inner diameter of 250mm, 12 circular mounting holes with the diameter of 36 mm are formed, and 12M 33 bolts and nuts are matched.

The first end ring 21, the second end ring 22 and the reducing pipe 1 are made of carbon steel Q345B, the rust removing grade is Sa2.5, and the thickness of the reducing pipe is hot galvanized by 75 um.

Claims

1. The utility model provides a reducing pressure pipeline crossover sub, includes reducing pipeline and connects the connecting piece at reducing pipeline both ends, its characterized in that: the connection includes a first end ring, a second end ring, and a seal; an annular caulking groove is arranged on the first end ring; an annular boss is arranged on the second end ring; a clamping table is arranged at the end part of the reducing pipeline; the clamping table of the reducing pipe can be embedded into the embedding groove of the first end ring; the annular boss of the second end ring can be embedded into the embedding groove of the first end ring; the sealing element is arranged in the caulking groove of the first end ring and is positioned between the clamping platform of the reducing pipe and the annular boss of the second end ring.

2. The variable diameter pressure pipe crossover joint of claim 1, wherein: and the diameter of the inner hole of the second end ring is the same as that of the inner hole of the reducing pipe.

3. The variable diameter pressure pipe crossover joint of claim 1, wherein: the sealing element is an annular sealing ring.

4. The variable diameter pressure pipe crossover joint of any one of claims 1-3, wherein: the first end ring and the second end ring are secured by a fastener.

5. The variable diameter pressure pipe crossover joint of claim 4, wherein: mounting holes for connecting the fasteners are arranged on the first end ring and the second end ring.