CN221974663U - Nuclear power plant pipeline pressure test plugging device - Google Patents

Abstract

The utility model discloses a nuclear power plant pipeline pressure test plugging device, which comprises a flange, a first sealing device and a second sealing device, wherein the flange is used for sealing and installing an opening of a pipeline to be tested, the flange is provided with a first surface and a second surface which are axially arranged in opposite directions, the flange is provided with a first channel penetrating through the first surface and the second surface, and the flange is also provided with a second channel extending to the first channel in a radial direction; the nuclear power plant pipeline pressure test plugging device further comprises a first connecting pipe detachably connected with the first end of the first channel and a second connecting pipe connected with the end, far away from the first channel, of the second channel, wherein the first connecting pipe is provided with a first control valve, and the second connecting pipe is provided with a second control valve; the nuclear power plant pipeline pressure test plugging device further comprises a pressure gauge detachably arranged on the second connecting pipe. The nuclear power plant pipeline pressure test plugging device can be applied to a test environment with a relatively small space, the device is simple in overall structure composition and low in manufacturing cost, and meanwhile, the device is convenient to assemble and can improve test operation efficiency.

Description

Nuclear power plant pipeline pressure test plugging device

Technical Field

The utility model relates to the technical field of nuclear power, in particular to a nuclear power plant pipeline pressure test plugging device.

Background Art

According to the technical requirements for nuclear power pipeline installation, pressure testing is required after the pressure pipeline is installed to verify the installation quality of equipment such as pipes, pipeline welds and valves and the integrity of the system. Pressure testing has become a commonly used detection method in the field of nuclear power installation.

The basic principle of the pressure test is to first use blind plates, plugs, etc. to seal the installed pipeline to form a closed space, and at the same time set a water inlet at the lowest point of the pipeline and a drain at the highest point of the pipeline, and arrange a pressure gauge to detect the internal pressure of the pipeline.

The pressure process mainly includes establishing a complete isolation boundary, water/air intake of the pipe system, pipeline pressurization inspection, pipe system drainage/exhaust, etc. When establishing a complete isolation boundary, it is necessary to use rubber tubes, threaded joints, etc. to connect the pressure gauge, blind plate, water inlet and outlet pipelines with the pipeline to be tested, resulting in the following defects: many parts are required, and the pressure test cost is high; the layout of rubber tubes and other pipelines requires a large space, has high space requirements, and cannot be used in scenes with small spaces; assembly and disassembly are troublesome, affecting the improvement of construction efficiency.

Utility Model Content

The technical problem to be solved by the utility model is to provide a nuclear power plant pipeline pressure test plugging device.

The utility model solves the technical problem by adopting a technical solution: constructing a nuclear power plant pipeline pressure test plugging device, comprising a flange for sealing and installing to the open end of the tested pipeline, the flange having a first surface and a second surface axially arranged opposite to each other, the flange being provided with a first channel penetrating the first surface and the second surface, and the flange being further provided with a second channel radially extending to the first channel;

The nuclear power plant pipeline pressure test plugging device further comprises a first connecting pipe detachably connected to a first end of the first channel, and a second connecting pipe connected to an end of the second channel away from the first channel, wherein a first control valve is disposed on the first connecting pipe, and a second control valve is disposed on the second connecting pipe;

The nuclear power plant pipeline pressure test plugging device also includes a pressure gauge detachably mounted on the second connecting pipe.

In some embodiments, the first connecting pipe is threadedly connected to the first end of the first channel.

In some embodiments, the first end of the first channel is provided with a first internal thread, and the first end of the first connecting pipe is provided with a first external thread connected to the first internal thread.

In some embodiments, the second connecting pipe is threadedly connected to an end of the second channel away from the first channel.

In some embodiments, an end of the second channel away from the first channel is provided with a second internal thread, and an end of the second connecting pipe is provided with a second external thread connected to the second internal thread.

In some embodiments, the second end of the first connecting pipe is provided with a quick connector.

In some embodiments, the first control valve is a ball valve;

And/or, the second control valve is a ball valve.

In some embodiments, the nuclear power plant pipeline pressure test plugging device further includes a sealing block detachably mounted on the first end of the first channel.

In some embodiments, the first connecting tube and the second connecting tube are both stainless steel tubes.

In some embodiments, the flange is provided with a plurality of mounting holes penetrating the first surface and the second surface.

The implementation of the utility model has the following beneficial effects: the nuclear power plant pipeline pressure test plugging device can be used in a relatively small test environment, the overall structure of the device is simple, the manufacturing cost is low, and at the same time, the device is easy to assemble and can improve the test operation efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

FIG1 is a schematic structural diagram of a nuclear power plant pipeline pressure test plugging device in some embodiments of the utility model;

FIG2 is a schematic structural diagram of a nuclear power plant pipeline pressure test plugging device in some embodiments of the utility model;

FIG3 is a cross-sectional view of a flange in some embodiments of the present invention;

FIG. 4 is a schematic diagram of the structure of a flange and a sealing block in some embodiments of the present invention.

DETAILED DESCRIPTION

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

Referring to Figures 1 to 3, the utility model shows a nuclear power plant pipeline pressure test plugging device, including a flange 10 for sealing and installing to the open end of the tested pipeline, the flange 10 having a first surface 10a and a second surface 10b axially oppositely arranged, the flange 10 having a first channel 11 penetrating the first surface 10a and the second surface 10b, the flange 10 also having a second channel 12 radially extending to the first channel 11, the first channel 11 being connected to the second channel 12. Preferably, the first channel 11 is provided at the center of the flange 10.

The nuclear power plant pipeline pressure test plugging device further includes a first connecting pipe 20 detachably connected to a first end of the first channel 11, and a second connecting pipe 30 connected to an end of the second channel 12 away from the first channel 11, a first control valve 40 is provided on the first connecting pipe 20, and a second control valve 50 is provided on the second connecting pipe 30. The nuclear power plant pipeline pressure test plugging device further includes a pressure gauge 60 detachably mounted on the second connecting pipe 30.

Before the pressure test, the flange 10 is sealed and installed on the open end of the tested pipeline, and the end of the first connecting pipe 20 away from the first channel 11 can be connected to a water source or a gas source.

When the nuclear power plant pipeline pressure test plugging device is installed at the low point of the tested pipeline, the first control valve 40 is opened and the second control valve 50 is closed to perform water/gas filling. After the water/gas filling is completed, the first control valve 40 is closed, the second control valve 50 is opened, and the pressure is tested by the pressure gauge 60. After the pressure test is completed, the pressure gauge 60 is removed, the second control valve 50 is closed, and the first control valve 40 is opened to drain or exhaust gas.

When the nuclear power plant pipeline pressure test plugging device is installed at the high point of the pipeline to be tested, the first control valve 40 is opened to exhaust when water enters (only water pressure test), and then the first control valve 40 is closed to form a complete isolation boundary, and the second control valve 50 is opened to use the pressure gauge 60 to perform pressure detection; after completion, the second control valve 50 is closed and the first control valve 40 is opened to drain and exhaust.

The nuclear power plant pipeline pressure test plugging device can be used in a relatively small test environment. The overall structure of the device is simple and the manufacturing cost is low. At the same time, the device is easy to assemble and can improve the test operation efficiency.

In some embodiments, the first connecting tube 20 is threadedly connected to the first end of the first channel 11. For example, the first end of the first channel 11 is provided with a first internal thread, and the first end of the first connecting tube 20 is provided with a first external thread connected to the first internal thread, and the two are threadedly connected.

In some embodiments, the second connecting tube 30 is threadedly connected to the end of the second channel 12 away from the first channel 11. If the end of the second channel 12 away from the first channel 11 is provided with a second internal thread, one end of the second connecting tube 30 is provided with a second external thread connected to the second internal thread.

In some embodiments, a quick connector is provided at the second end of the first connecting pipe 20 to facilitate quick connection to a water source or a gas source.

In some embodiments, the first connecting tube 20 and the second connecting tube 30 may also be provided with a filter, such as a Y-type filter.

In some embodiments, the first control valve 40 is a ball valve; and/or, the second control valve 50 is a ball valve.

As shown in FIG4 , in some embodiments, the nuclear power plant pipeline pressure test plugging device further includes a sealing block 70 that is detachably mounted on the first end of the first channel 11. When the nuclear power plant pipeline pressure test plugging device is used in a narrow space environment, the first connecting pipe 20 and the first control valve 40 are removed or not installed, and the first end of the first channel 11 is sealed by the sealing block 70. At this time, the first channel 11 and the second channel 12 are still in a connected state, and the channel formed by the two is roughly L-shaped. When it is necessary to fill and drain water/gas, it is only necessary to remove the pressure gauge 60 and fill and drain water/gas through the second connecting pipe 30. After filling and draining water/gas, the pressure gauge 60 is installed to perform pressure detection.

The sealing block 70 may be a stainless steel threaded block. Further, the circumferential surface of the sealing block 70 may be provided with a groove, and a waterproof sealing ring 80 may be provided in the groove to improve the sealing performance.

In some embodiments, the first connecting tube 20 and the second connecting tube 30 are both stainless steel tubes.

In some embodiments, the flange 10 is provided with a plurality of mounting holes 13 that pass through the first surface 10a and the second surface 10b, and fasteners (such as fastening bolts or fastening screws) are passed through the mounting holes 13 to mount the flange 10 to the open end of the measured pipeline. Preferably, the flange 10 is a circular plate-like structure, which can be made of a metal material such as stainless steel.

It can be understood that the nuclear power plant pipeline pressure test plugging device can simultaneously meet the functional requirements of pressure detection, water intake and drainage, on-off control, etc., and is also suitable for operating scenarios where space is narrow and the pipeline support cannot be removed.

It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims (10)

1. A nuclear power plant pipeline pressure test plugging device, characterized in that it comprises a flange (10) for sealing and installing at an open end of a pipeline to be tested, the flange (10) having a first surface (10a) and a second surface (10b) axially arranged opposite to each other, the flange (10) being provided with a first channel (11) penetrating the first surface (10a) and the second surface (10b), and the flange (10) being further provided with a second channel (12) radially extending to the first channel (11); The nuclear power plant pipeline pressure test plugging device further comprises a first connecting pipe (20) detachably connected to a first end of the first channel (11), and a second connecting pipe (30) connected to an end of the second channel (12) away from the first channel (11), the first connecting pipe (20) being provided with a first control valve (40), and the second connecting pipe (30) being provided with a second control valve (50); The nuclear power plant pipeline pressure test plugging device further comprises a pressure gauge (60) detachably mounted on the second connecting pipe (30). 2. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the first connecting pipe (20) is threadedly connected to the first end of the first channel (11). 3. The nuclear power plant pipeline pressure test plugging device according to claim 2 is characterized in that the first end of the first channel (11) is provided with a first internal thread, and the first end of the first connecting pipe (20) is provided with a first external thread connected to the first internal thread. 4. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the second connecting pipe (30) is threadedly connected to an end of the second channel (12) away from the first channel (11). 5. The nuclear power plant pipeline pressure test plugging device according to claim 3 is characterized in that an end of the second channel (12) away from the first channel (11) is provided with a second internal thread, and one end of the second connecting pipe (30) is provided with a second external thread connected to the second internal thread. 6. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the second end of the first connecting pipe (20) is provided with a quick connector. 7. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the first control valve (40) is a ball valve; And/or, the second control valve (50) is a ball valve. 8. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the nuclear power plant pipeline pressure test plugging device further comprises a sealing block (70) detachably mounted on the first end of the first channel (11). 9. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the first connecting pipe (20) and the second connecting pipe (30) are both stainless steel pipes. 10. The nuclear power plant pipeline pressure test plugging device according to claim 1, characterized in that the flange (10) is provided with a plurality of mounting holes (13) penetrating the first surface (10a) and the second surface (10b).