RU2398150C1 - Hydraulic safety valve - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: hydraulic safety valve consists of case with cover, of cup, of ferrule and of drain openings. The case is made of two parts: a lower cylinder one and a coaxial to it upper conical one. On the conical part of the case there is positioned the cover with a built-in fire safety device. Also a circular air outlet and assembling bolts are arranged on the cover. The lower cylinder and the upper conic parts of the case are interconnected with flanges by means of fixture elements. The cup is installed in the lower part of the case. The cup consists of an upper conic cup rigidly coupled with the flange of the lower part of the case and of a lower cylinder cup. A drain pipe is connected to the latter via a branch; the pipe is run through the lower part of the case by means of a packing joint. The drain opening is made in a bottom part of the case. The cylinder ferrule with an expanding conic branch, a closed screen and an exhaust port is mounted in the upper part of the case. The ferrule is attached to the upper part of the case by means of an inclined partition coupled with the drain opening, which is positioned in the upper part of the case.

EFFECT: increased efficiency of process equipment protection from explosion by raising operation speed and reliability of actuation.

1 dwg

Description

The invention relates to mechanical engineering, in particular for the protection of vertical tanks from destruction with an unacceptable increase in pressure in the tank.

The closest technical solution to the claimed object is a breathing valve according to RU 2219407 C1, class. F16K 17/19, 12.20.2003 (prototype), comprising a housing, a shutter, a safety element.

A disadvantage of the known solution is the relatively low reliability of operation.

EFFECT: increased efficiency of protection of technological equipment from explosions by increasing speed and reliability of operation.

This is achieved by the fact that in the hydraulic safety valve, comprising a body with a cover, a cup, a holder and drain holes, the body is made of two parts: the lower cylindrical and the upper, coaxial with it, - conical, on which the cover is installed with an integrated fire fuse, and an annular air vent is mounted on the cover and mounting bolts are installed, and the lower cylindrical and upper conical parts of the housing are interconnected via flanges by means of fasteners, and in the lower part of the housing A cup consisting of an upper conical bowl rigidly connected to the flange of the lower part of the casing and a lower cylindrical cup, to which a drain pipe is connected through the lower part of the casing and brought out through the lower part of the casing, has a cup, and there is a drain hole in the bottom of the casing in the upper part of the casing is mounted a cylindrical cage with an expanding conical pipe, a closed screen and having an exhaust hole, and the cage is fixed to the upper part of the casing by means of an inclined partition, knitted with a drain hole located in the upper housing part.

The drawing shows a hydraulic safety valve.

The hydraulic safety valve consists of a housing 1 with a connecting flange 12 connected to the housing through a gasket 10 and an adapter flange 11. The housing 1 is made of two parts: the lower cylindrical and the upper, coaxial with it, - conical, on which the cover 6 with integrated fire fuse 5. On the cover 6, an annular air vent 21 is mounted and mounting bolts 22 are installed. The lower cylindrical and upper conical parts of the housing are interconnected via flanges 13 and 14 by means of fixing elements cops 15. In the lower part of the casing is mounted a cup 2, consisting of an upper conical bowl 17, rigidly connected with a flange 14 of the lower part of the casing, and a lower cylindrical bowl 16, which is connected through a pipe 23 and brought out through the lower part of the casing by means of a tube sealing unit 24 7 discharge (filling). In the bottom of the housing 1 there is a drain hole 8. In the upper part of the housing there is a cylindrical ferrule 3 with an expanding conical pipe 19, a closed screen 4 and having an exhaust hole 20. The ferrule 3 is fixed to the upper part of the housing by an inclined partition 18 connected to the drain hole 9 located in the upper part of the housing. Holder 3, cup 2 coaxial with housing 1.

The hydraulic safety valve operates as follows.

When the pressure inside the tank is higher than the calculated one (for the breathing valve), the oil vapor inside the valve is pressed onto the surface of the oil poured into the valve, and gradually, with increasing pressure, it is forced out into the housing 1, and then through the cup 2 and the pipe 3 the oil vapor passes to the cover 6, and the oil is drained through holes 7, 8, 9.

The principle of operation of the built-in fire fuse 5 is based on the delay of the flame by the cartridge forming the channels of small diameter. The flame, falling into the channels of small cross section, is crushed into individual shallow streams. The contact surface of the flame with the flame arrester increases, the heat transfer to the walls of the channels increases, and the flame goes out.

The valve is poured with a low-freezing and slightly evaporating liquid - solar oil, an aqueous solution of glycerin, ethylene glycol, etc.

Specifications

Diameter of nominal bore of connecting pipe DN, mm 100 ÷ 350

Response pressure, Pa (mm water column), not more than 1961 (200)

Operation vacuum within, Pa (mm water column), no more than 392 (40)

Throughput (by air), m ³ / h, 200 ÷ 2700

The volume of the liquid filled with a hydraulic lock (transformer oil), l, not more than 46.5

Overall dimensions, mm:

length L 980 ÷ 1180

width B 845 ÷ 1030

height H 1278 ÷ 1510

Connecting sizes, mm, D: 205 ÷ 485; D1: 170 ÷ 445; d: 18 ÷ 20.

Claims (1)

Hydraulic safety valve, comprising a housing with a cover, a cup, a clip and drain holes, characterized in that the housing is made of two parts: a lower cylindrical and an upper one, coaxial with it, conical, on which a cover with a built-in fire fuse is installed, and the cover is mounted annular air vent and mounting bolts are installed, and the lower cylindrical and upper conical parts of the housing are interconnected via flanges by means of fasteners, and mounted in the lower part of the housing a cup consisting of an upper conical bowl rigidly connected to a flange of the lower part of the body and a lower cylindrical bowl, to which is connected a drain pipe through the nozzle and brought out through the lower part of the body through the sealing unit, and there is a drain hole in the bottom of the body, a cylindrical ferrule with an expanding conical nozzle, a closed screen and having an exhaust hole, is mounted on the upper part of the housing, and the ferrule is fixed to the upper part of the housing by means of an inclined partition, connected oh with a drain hole located in the upper housing part.