CN202040393U

CN202040393U - Safety valve

Info

Publication number: CN202040393U
Application number: CN201120140872XU
Authority: CN
Inventors: 梅莉; 杜晓林
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-06
Filing date: 2011-05-06
Publication date: 2011-11-16
Anticipated expiration: 2021-05-06

Abstract

The utility model discloses a safety valve, which is mounted at the opening of a gas tank used for storing pressure gas and includes a valve body (1), wherein holes are formed on the valve body and at least include a main hole (4) communicated with a gas source and an output hole; the central lines of the two holes are mutually vertical or coincident; a rotatable valve core (5) is arranged on the main hole; the valve core is provided with a handle (4) for controlling the connection or disconnection of the hole; an auxiliary small hole (11) communicated with the gas source is arranged on the valve core; the air outlet end of the small hole is communicated with the side hole (12) on the valve body; a threaded plug (13) is arranged at the opening of the side hole; and a concave hole (14) is formed at one end of the plug, low-fusion point alloy is filled in the hole cavity, and an external leakage hole (16) is formed on the hole cavity. When the gas tank is in the dangerous environment as a heat source, the temperature of the gas rises, so as to automatically fuse the low-fusion point alloy of the plug, the pressure gas leaks from the external leakage hole of the plug, the gas pressure in the tank is relieved, and the pressure containing tank is prevented from being exploded.

Description

A kind of Safety valve

Technical field

The utility model relates generally to a kind of valve, particularly a kind of Safety valve.

Technical background

Known pressure vessel is as the gas tank of storage LNG Liquefied natural gas, and general bottleneck is all wanted mounted valve, in order to open or to close gas, but known valve does not have safety installations, place thermal source as gas tank, expand then will be explosion caused and cause danger for gas in jar, so this situation answers idea to avoid.

The model utility content

The purpose of this utility model is to provide a kind of can overcome the known technology shortcoming, can avoid gas tank to meet a kind of Safety valve of thermal explosion.

For achieving the above object, scheme of the present utility model is: a kind of Safety valve, be installed on the bottleneck of storage pressed gas gas tank, by valve body, have the hole on the valve body, described hole comprises main aperture and the delivery outlet that communicates with source of the gas at least, the orthogonal or coincidence of two centerline holes, and main aperture is provided with rotating spool, spool has handle, an auxiliary aperture that communicates with source of the gas is established in the connection of control hole or disconnection, and the outlet side of aperture communicates with side opening on the valve body, the opening of side opening has screw thread to stop up, stop up an end and have shrinkage pool, be filled with low-melting alloy in the vestibule, vestibule has the hole of leaking.

Adopt such scheme, be in when gas tank in the hazardous environment such as thermal source, gas temperature rises, can melt the low-melting alloy of obstruction automatically, pressed gas releases from the hole of stopping up of leaking, and has alleviated a jar interior gas pressure, avoid the pressure volume pot blast, thereby realized the purpose of this utility model.

Below in conjunction with diagram and embodiment scheme is described in more detail.

Description of drawings

Fig. 1 is a kind of plan view of Safety valve;

Fig. 2 is the side view of Fig. 1.

Embodiment

As shown in Figure 1, be one and be installed in pressure volume pot, be mounted in the valve of storing on the LNG Liquefied natural gas gas tank particularly, comprise that a cross section becomes the valve body 1 of T shape, there is the through hole 2 of an output gas upper end of valve body, the two ends in hole 2 are the attachment hole 3 of connecting tube joint, the pipe joint connecting line, the main aperture 4 that body cavity has the straight-through valve body center communicates with source of the gas, the center line in main aperture and hole 2 is orthogonal, main aperture is provided with rotating spool 5, spool 5 is a spherical spool, spool 5 by the spool seat of honour 6 and following 7 engagement limits of spool in valve pocket, particularly the spool seat of honour 6 by with the pressed spool that is threaded of valve body, have hole 8 on the spool 5, by the valve rod 9 that is threaded, connect handle 10 on the other hand, thereby rotatable spool 5 makes it rotate along center spool by valve rod, connect or disconnection main aperture 4, the non-metal part in the diagram is rubber or plastic seal.

On valve body, be provided with an auxiliary aperture 11 that communicates with source of the gas, the outlet side of aperture 11 links to each other with side opening 12 on the valve body, the aperture of side opening 12 is fixed with one with screw thread and stops up 13, one end of obstruction 13 has dug shrinkage pool 14, be filled with low-melting alloy 15 in the shrinkage pool 14, the low-melting alloy of present embodiment is made by bismuth alloy, the design of fusing point is a standard with the safety margins of gas cylinder temperature, shrinkage pool 14 has the hole 16 of leaking, the end face and a safety plate 17 of obstruction 13 join, safety plate energy bearing certain pressure, pressure is excessive then to split automatically, and the pressed gas of aperture 11 passes safety plate from the hole ejection that leaks.

The working principle of safety valve is: identical with known valve function during proper functioning; in case gas cartridge is in the hazardous environment, and is overheated as ambient temperature, gas temperature rises in the bottle; pressure also rises; when temperature arrives the safety margins that is provided with, the low-melting alloy fusing, hole 16 flows away from leaking; safety plate splits; so gas directly releases from the hole of leaking in the bottle, pressure of the inside of a bottle descends, thereby has protected gas cylinder not exploded.

Claims

1. Safety valve, be installed on the bottleneck of storage pressed gas gas tank, by valve body (1), have the hole on the valve body, described hole comprises main aperture (4) and the delivery outlet that communicates with source of the gas at least, orthogonal or the coincidence of two centerline holes, main aperture is provided with rotating spool (5), spool has the connection or the disconnection of handle (10) control hole, it is characterized in that: establish an auxiliary aperture (11) that communicates with source of the gas, the outlet side of aperture communicates with side opening (12) on the valve body, the opening of side opening has screw thread to stop up (13), stop up an end and have shrinkage pool (14), be filled with low-melting alloy in the vestibule, vestibule has the hole of leaking (16).

2. a kind of Safety valve according to claim 1 is characterized in that: the end face and the safety plate (17) that stop up (13) join.