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A low-pressure large-diameter safety valve

A safety valve and large-diameter technology, which is applied in the field of safety valves, can solve problems such as the impact of service life and the impact of non-metallic sealing materials, and achieve the effects of small size, zero leakage and compact structure

Active Publication Date: 2017-02-01
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sealing performance of pure non-metallic elastic sealing safety valve is improved compared with that of metal sealing safety valve, it will have a great impact on non-metallic sealing material during the closing process of the safety valve, which will have a great impact on its service life

Method used

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  • A low-pressure large-diameter safety valve
  • A low-pressure large-diameter safety valve
  • A low-pressure large-diameter safety valve

Examples

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0022] Such as figure 1 As shown, the main structure of the low-pressure large-diameter safety valve of the present invention is composed of a valve body 1, a guide sleeve 4, a cover plate 6 and a valve cap 7 which are integrated with a valve seat and valve body. The guide sleeve 4 is connected between the valve body 1 and the cover plate 6 by bolts, and the valve cap 7 is installed on the cover plate 6 by threads. In the valve body cavity, the positioning screw 10 is threadedly connected to the side hole of the valve body 1, and the valve body 1 is connected with an adjusting ring 5, which can be adjusted by the positioning screw 10, thereby adjusting the excess pressure and return of the safety valve Performance parameters such as pressure.

[0023] The adjusting screw 8 is installed on the cover plate 6 through threads, and the lock nut 12 is installed on th...

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Abstract

The invention relates to a safety valve for performing overpressure protection on a pressure system, in particular to a low-pressure large-diameter spring direct-action type safety valve. A guiding sleeve is connected between a valve body and a cover plate; a bonnet is arranged on the cover plate; a positioning screw is connected to a side hole of the valve body in a valve body cavity; the valve body is connected with an adjusting ring; an O-shaped ring is inlaid in a groove formed by a valve clack and a disc holder and is fixed at the lower end of a body of the disc holder, and a formed combination is pressed on a sealing surface of the valve body through a spring; a spring and an upper spring seat are integrally positioned in a cavity formed by the disc holder, the guiding sleeve and the cover plate; the spring is directly arranged on the disc holder; an adjusting screw is arranged on the cover plate; a locking nut is arranged at the upper end of the adjusting screw; the adjusting screw conducts force to the spring through a thrust washer, a bearing and the upper spring seat, and setting pressure is adjusted; the disc holder and the sealing surface of the valve body are ground and then are in metal sealing; and the O-shaped ring and the sealing surface of the valve body are in nonmetal elastic sealing.

Description

Technical field [0001] The invention relates to a safety valve used for overpressure protection of a pressure system, in particular to a low-pressure large-diameter spring direct-acting safety valve. Background technique [0002] The spring direct-acting safety valve is an automatic valve that automatically opens and discharges a certain amount of fluid when the system pressure reaches the set pressure to prevent the pressure in the system from exceeding the predetermined safety value. When the pressure returns to normal, the valve will be closed again to prevent the medium from continuing to flow out. [0003] With the scale of petrochemical, electric power and other industries and the continuous development of the single equipment required, the traditional maximum flow channel area code "T" (effective flow) specified in API526 "Steel Flange Pressure Relief Valve" Road area is 167.742cm 2 ) Safety valve often can not meet the needs of actual use. If multiple safety valves with t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/06
CPCF16K17/06
Inventor 段淼淼翟红波郑晖李晓峰高玉林
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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