CN217683533U

CN217683533U - Water pressure test block valve with leakage detection function

Info

Publication number: CN217683533U
Application number: CN202221563327.6U
Authority: CN
Inventors: 李洋; 张尚义; 李茂元; 李乃安; 李嘉杨; 蔡明瑞; 陆星宇
Original assignee: Harbin Power Plant Valve Co ltd
Current assignee: Harbin Power Plant Valve Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-10-28
Anticipated expiration: 2032-05-27

Abstract

The utility model relates to a hydrostatic test block valve with leak testing function for on thermal power generating unit main steam outlet and re-heater advance, the export pipeline, the pressure testing medium in the shutoff pipeline uses when the whole static hydrostatic test of unit. The method is characterized in that: the bottom of the valve body is provided with a semi-annular groove, leakage media are introduced into the plug screw hole, the plug screw is in threaded connection with the valve body, and sealing is achieved through a sealing ring. When the water pressure of the boiler system leaks, whether the blocking plate of the water pressure test blocking valve leaks or not is detected according to the medium flow condition of the plug hole. The utility model discloses can test the leakage condition of stifled valve closure plate when effectual detecting system hydrostatic test, get rid of fast or confirm the hydrostatic test of system and leak the reason.

Description

Water pressure test block valve with leakage detection function

Technical Field

The utility model relates to a hydrostatic test block valve with leak testing function for on thermal power generating set main steam outlet and reheater advance, the export pipeline, use as the pressure testing medium in the whole static hydrostatic test time shutoff pipeline of unit.

Background

At present, the hydraulic test plugging valve used in the thermal power industry is composed of a plugging plate and a supporting plate in an internal structure. The blocking plate is provided with an O-shaped sealing ring which is used as an isolating device when the boiler system is under static water pressure. However, when the boiler system is subjected to a hydraulic test, the leakage of the pipeline at the test section occurs, so that the test pressure cannot be increased. All devices in the test section pipeline need to be checked at the moment, and the hydraulic test plugging valve in the current industry cannot detect whether the plugging plate serving as the isolating device leaks, namely, the medium exceeds the O-shaped ring.

Disclosure of Invention

The method aims to overcome the problem that whether the plugging plate of the existing hydraulic test plugging valve leaks during the hydraulic test of a boiler system cannot be judged. The utility model provides a water pressure test stifled valve with leak testing function can confirm whether water pressure test stifled valve leaks when boiler system water pressure test leaks.

The utility model adopts the technical scheme as follows: the utility model provides a stop valve with leak testing function comprises parts such as valve body, backup pad, closure plate, O type circle, plug screw, sealing washer, its characterized in that: the bottom of the valve body is provided with a semi-annular groove, leakage media are introduced into the plug screw hole, the plug screw is in threaded connection with the valve body, and sealing is achieved through a sealing ring. When the water pressure of the boiler system leaks, whether the blocking plate of the blocking valve leaks or not is determined through the plug hole.

The technical characteristics are as follows: simple structure, small occupied space and simple and convenient operation.

The beneficial effects of the utility model are that: the leakage condition of the blocking valve blocking plate is checked during the effective detection of the system hydrostatic test, and the leakage reason of the system hydrostatic test can be quickly eliminated or determined.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is an assembly view of a block valve for a water pressure test

In the figure: 1. valve body, 2, supporting plate, 3, closure plate, 4, O-shaped ring, 5, plug screw, 6 and sealing ring

Detailed Description

As shown in fig. 1, a plug valve with a leakage detection function includes a valve body (1), a support plate (2), a plug plate (3), an O-ring (4), a plug screw (5), and a sealing ring (6). The valve body is provided with an annular groove and a threaded hole at the rear side of the blocking plate (3), the plug screw (5) is screwed on the valve body (1) through threads, and the sealing ring (6) is compressed to realize sealing. When the leakage occurs in the boiler system hydraulic test, the screw plug (5) is unscrewed, and if the medium flows out of the threaded hole, the leakage of the blocking plate (3) of the blocking valve can be confirmed to be the cause of the system hydraulic leakage. If no medium flows out, the sealing performance of the blocking plate (3) is proved to be good, and the leakage reason of the blocking plate is eliminated. After the leakage detection is finished, the screw plug (5) is screwed down again, and the valve is ensured not to leak outwards by pressing the sealing ring (6).

Claims

1. A hydrostatic test block valve with a leakage detection function comprises a valve body (1), a support plate (2), a block plate (3), an O-shaped ring (4), a screw plug (5) and a sealing ring (6); the method is characterized in that: an annular groove and a threaded hole are machined in the rear side position of the blocking plate (3) of the valve body, a screw plug (5) is screwed on the valve body (1) through threads, and a sealing ring (6) is pressed to realize sealing; according to the medium condition in the threaded hole after the screw plug (5) is unscrewed, the leakage cause of the hydraulic test of the system can be quickly eliminated or determined.