RU1813956C - Valving member - Google Patents

Abstract

Usage: to protect installations operating on cryogenic media. SUMMARY OF THE INVENTION: A locking body with a rod and a finned hollow cylinder surrounding it made of a material with high thermal conductivity are coaxially mounted in a housing with underwater and branch pipes. A drive diaphragm is mounted on the rod, fixed to the periphery rib at the end of the cylinder, the internal cavity of which is filled with water. The chamber between the walls of the housing and the cylinder is in communication with the inlet and outlet nozzles. An insert of a porous hydrophilic material is placed in the cavity of the cylinder. The insert is made in bulk from porous metal balls with the formation of capillary channels, between them. 1 s.p. f-ly, 1 ill. ; fe

Description

The invention relates to pipe fittings and can be used to protect installations operating on cryogenic media .; l

; , The purpose of the invention is to increase reliability in operation .:

 Comparative analysis with the prototype shows that the claimed device is characterized in that an insert of porous hydrophilic material is placed in the inner cavity of the cylinder, the insert being made in bulk of porous metal balls with the formation of capillary channels between them.

- The invention is illustrated in the drawing, which shows the proposed device.

The locking device comprises a housing 1 with underwater 2 and outlet 3 pipes. A locking member 4 with a rod 5 and a finned hollow cylinder 8 surrounding it made of a material with high thermal conductivity are coaxially mounted in the housing 1. A drive diaphragm 7 is mounted on the stem 5, fixed peripherally at the end of the finned cylinder b. A chamber 8 between the walls of the housing 1 and the cylinder 6 is in communication with the nozzles 2 and 3. In the inner cavity of the cylinder 6 there is an insert 9 made of porous hydrophilic material, the insert being made in bulk of porous metal balls 10 with the formation of capillary channels 11 between them. A saddle 12 and a guide sleeve 13 are also placed in the housing 1. Camera

00

CJ H) SP

about

8 is closed by a lid 14 with a stopper 15 for pouring water into the cylinder 6.

The device operates as follows.

Under normal conditions, when gas with a positive temperature passes through the device, the shut-off member 4 is in the open state. Gas through the pipe 2 enters the chamber 8, washes the outer ribs of the cylinder 6 and through the open hole of the seat 12 enters through the pipe 3 to the consumer.

When gas with a low temperature enters the device, water is cooled in the internal cavity of the cylinder 6 and it freezes. Expanding during freezing, ice presses on the diaphragm 7, which drives the locking element 4 and closes the hole in the seat 12. In this case, the gas supply to the consumer is stopped. In the event of damage to the diaphragm or leakage of the cylinder, water retained by capillary forces will not flow out of the cylinder.

Since the insert can be made bulk from porous metal

balls co- (clocked between themselves and the cylinder, the mass of water will warm up (or cool) faster, which increases the efficiency of the device, increases its reliability in operation.

Claims (2)

1. Shut-off device, in the case of which with underwater and branch pipes a locking element with a rod and a finned hollow cylinder enclosing it made of a material with high thermal conductivity are coaxially mounted, a drive diaphragm is mounted on the rod, fixed peripherally at the end of the finned cylinder, the internal cavity of which is filled with water, and the chamber between the walls of the housing and the cylinder communicates with the inlet and outlet pipes, which means that an insert of a porous hydrophilic material is placed in the inner cavity of the cylinder. 2. The device according to p. 2, with the exception that the insert is made of bulk porous metal balls with the formation of capillary channels between them,