CN213512642U - Pipe cap for main steam pipeline of nuclear power plant - Google Patents
Pipe cap for main steam pipeline of nuclear power plant Download PDFInfo
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- CN213512642U CN213512642U CN202020490047.1U CN202020490047U CN213512642U CN 213512642 U CN213512642 U CN 213512642U CN 202020490047 U CN202020490047 U CN 202020490047U CN 213512642 U CN213512642 U CN 213512642U
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- pipe cap
- power plant
- nuclear power
- main steam
- steam pipeline
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Abstract
A pipe cap for a main steam pipeline of a nuclear power plant comprises a pipe cap main body and a plug steel body, wherein the pipe cap main body is of a circular structure, and the plug steel body is cylindrical. The diameter of the pipe cap main body is larger than the steel pipe on which the pipe cap is arranged. The outer diameter of the plug steel body is smaller than the inner diameter of the pipeline to which the plug steel body is installed.
Description
Technical Field
The technology relates to the field of nuclear energy and electricity, in particular to a pipe cap used on a main steam pipeline of a nuclear power plant.
Background
The hydraulic test of the main steam pipeline of the nuclear power plant needs to exhaust at a pipeline high point, the exhaust point is usually designed at the highest point of the main steam pipeline between a nuclear island and a conventional island, and two isolation valves are arranged on small exhaust pipes. In the normal operation period of a certain domestic power plant, when steam leaks from the two isolation valves, radioactive materials may leak or a unit stops to reduce power, in order to thoroughly eliminate the hidden danger, the power plant is designed to cut off the two isolation valves and perform plugging in a welded pipe cap mode. But because the conventional island has big opening during the overhaul of power plant, main steam pipeline also can't effectively be kept apart, has boiler effect in the main steam pipeline simultaneously, and then has in the high point exhaust tubule to last the air current to flow out, and standard pipe cap can't effectively weld under the condition that has obvious air current, so need block up the air current in the exhaust tubule through effectual mode, this novel pipe cap is used for solving this technical problem promptly.
Disclosure of Invention
The invention aims to: the invention discloses a pipe cap for a main steam pipeline of a nuclear power plant, and aims to solve the problem that plug bush welding cannot be effectively implemented by changing and modifying a high-point exhaust small pipe of the main steam pipeline of the nuclear power plant from an isolation valve to a pipe cap plug.
The technical scheme of the invention is as follows: a pipe cap for a main steam pipeline of a nuclear power plant comprises a pipe cap main body and a plug steel body, wherein the pipe cap main body is of a circular structure, and the plug steel body is cylindrical.
The diameter of the pipe cap main body is larger than the steel pipe on which the pipe cap is arranged.
The outer diameter of the plug steel body is smaller than the inner diameter of the pipeline installed
The outer diameter of the plug steel body is 0.4mm to 0.8mm smaller than the inner diameter of the pipeline in which the plug steel body is installed.
The pipe cap main body is welded with the steel pipe in a plug bush mode.
The invention has the following remarkable effects: because the air current is not big, adopt not having gaseous outflow in this novel pipe cap back blast pipe, created good environment for the welding of pipe cap plug bush, can effectively solve the power plant because of there is the air current and then unable welded technical problem in this isolation difficulty tubule.
Drawings
FIG. 1 is a schematic view of a pipe cap used on a main steam line of a nuclear power plant;
FIG. 2 is a side view of a pipe cap for use on a main steam line of a nuclear power plant;
in the figure: 1 pipe cap main body and 2 plug steel body
Detailed Description
A pipe cap for a main steam pipeline of a nuclear power plant comprises a pipe cap main body 1 and a plug steel body 2, wherein the pipe cap main body 1 is of a circular structure, the diameter of the pipe cap main body is larger than a steel pipe on which the pipe cap is arranged, the plug steel body 2 is cylindrical, and the outer diameter of the plug steel body is smaller than the inner diameter of a pipeline on which the pipe cap is arranged by about 0.4mm to 0.8 mm.
The pipe cap body 1 is welded with the steel pipe in a plug bush mode to form a pressure-bearing boundary of the main steam pipeline.
The water-saving device is not used during normal operation, and needs to be cut off when air is exhausted during the hydrostatic test of the main steam pipeline.
Claims (3)
1. The utility model provides a pipe cap for on nuclear power plant main steam pipeline which characterized in that: the pipe cap comprises a pipe cap main body (1) and a plug steel body (2), wherein the pipe cap main body (1) is of a circular structure, and the plug steel body (2) is cylindrical;
the outer diameter of the plug steel body (2) is 0.4mm to 0.8mm smaller than the inner diameter of the pipeline in which the plug steel body is arranged;
the pipe cap main body (1) is welded with the steel pipe in a plug bush mode.
2. The pipe cap used on a main steam pipeline of a nuclear power plant according to claim 1, characterized in that: the diameter of the pipe cap main body (1) is larger than the diameter of the steel pipe on which the pipe cap is arranged.
3. The pipe cap used on a main steam pipeline of a nuclear power plant according to claim 1, characterized in that: the outer diameter of the plug steel body (2) is smaller than the inner diameter of the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020490047.1U CN213512642U (en) | 2020-04-07 | 2020-04-07 | Pipe cap for main steam pipeline of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020490047.1U CN213512642U (en) | 2020-04-07 | 2020-04-07 | Pipe cap for main steam pipeline of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213512642U true CN213512642U (en) | 2021-06-22 |
Family
ID=76378559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020490047.1U Active CN213512642U (en) | 2020-04-07 | 2020-04-07 | Pipe cap for main steam pipeline of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213512642U (en) |
-
2020
- 2020-04-07 CN CN202020490047.1U patent/CN213512642U/en active Active
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