CN2299971Y

CN2299971Y - Overflow gas safety automatic cut-off valve

Info

Publication number: CN2299971Y
Application number: CN 97216582
Authority: CN
Inventors: 冯金生; 董义伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-15
Filing date: 1997-05-15
Publication date: 1998-12-09
Anticipated expiration: 2007-05-15

Abstract

The utility model relates to an overflow gas safety automatic cut-off valve, which is composed of a positioning sleeve, a hemispherical valve core plate in a valve core cavity whose wall surface is bevel of the positioning sleeve, a valve core bar in integral connection with a valve core plate, a supporting frame for positioning and guiding fixed in a back cavity of the valve core of the positioning sleeve and a return spring for pushing. The valve core bar can penetrate through a guide hole of the supporting frame for positioning and guiding and can be connected with the supporting frame for positioning and guiding through the return spring for pushing arranged on the valve core bar. The utility model is arranged in a spheroidal control valve before a device for metering used gas; when gas overflows, or the press of gas supply is abruptly rise and is over-pressure, the gas supply can be automatically cut-off; the utility model can avoid the explosion accident of the device for metering caused by the over-pressure of the gas supply.

Description

Overflow-type gas safe automatic stop valve

The utility model relates to a kind of pneumatic type self acting stop valve.

Along with the universal use of combustion gas in family life, because of the overvoltage that jumps of the excessive and supply gas pressure of combustion gas causes with the gas gauge table fire accident that causes of exploding and happens occasionally, this not only makes the property of family take a bath but also makes people's life safety also be subjected to great threat.The reason of the reason that causes fire accident on using, not having automatic gas-cutting off device on the existing steam line also is a major reason, particularly because of the supply gas pressure fire accident that overvoltage causes the gauge table blast to cause that jumps.

The purpose of this utility model provides that a kind of excessive or supply gas pressure jumps and can cut off the overflow-type gas safety cut-off valve of air feed when producing overvoltage automatically when combustion gas.

Overflow-type gas safe automatic stop valve is by setting sleeve, half ball valve central layer, constitute with whole valve core rod, valve core rod positioning and guiding support, the pushing tow return spring that is connected of valve core plate, the location is with spool chamber and spool back cavity, the spool chamber wall is a tapered slope, the half ball valve central layer is positioned at spool chamber, spherical wall of valve core plate and spool chamber wall compress the applying valve closing, on the contrary valve opening.Valve core rod positioning and guiding support is fixed in the setting sleeve spool back cavity, and the pilot hole that valve core rod passes on the support returns chivalrous spring valve core rod is bound up on the support by being loaded on pushing tow on the valve core rod.

Be installed in during use in the control valve of gas meter front, the half ball valve central layer reach under the air-flow thrust that strengthens rapidly of cut-off valve that jumps when overvoltage takes place of excessive or supply gas pressure makes the bulb flat face of spool bore the skew wall face with the setting sleeve spool chamber to compress sturdy cut-off valve cuts out and stop air feed when pipeline generation combustion gas.

The overflow-type gas safe automatic stop valve that the utility model provides, volume is little, simple in structure, can strike up partnership with spherical valve during use and use as control valve before the table, its outward appearance, volume and existing ball-type gas control valve are identical, thereby are convenient to domestic gas piping erection effect.When the excessive and overvoltage air feed of pipeline generation combustion gas, air feed can be cut off automatically, avoid excessive and overvoltage air feed to cause the generation of the fire accident that the gauge table blast causes, guarantee household safe gas because of combustion gas.

Accompanying drawing is embodiment of the present utility model, further specifies the utility model below in conjunction with embodiment.

Fig. 1 is the structural representation of overflow-type gas safe automatic stop valve;

Fig. 2 is when using overflow-type gas safe automatic stop valve and the assembly structure schematic representation of ball-type gas control valve,

As shown in Figure 1, overflow-type gas safe automatic stop valve is by setting sleeve (1), half ball valve central layer (2), with the whole valve core rod (3) that is connected of valve core plate, valve core rod positioning and guiding support (8), pushing tow return spring (7) constitutes, the location is with spool chamber (4) and spool back cavity (6), spool chamber wall (9) is a tapered slope, the half ball valve central layer is loaded in the spool chamber, valve core rod positioning and guiding support is fixed in the spool back cavity of setting sleeve, and the pilot hole (5) that valve core rod passes on the positioning and guiding support is bound up on valve core rod on the support by the pushing tow return spring that is loaded on the valve core rod.

As shown in Figure 2, the fastening plug (11) of ball-type gas control valve screwed off take out sealing gasket (12) and extract spool tappet (10) out ball-type spool (13) is taken out during use.Again second sealing gasket (14) taken off overflow-type gas safe automatic stop valve is loaded in the spool chamber of ball valve, successively sealing gasket, spherical valve core, sealing gasket being packed in the valve then and screwing compacting by fastening plug makes valve seal, after assembling finishes promptly as shown state ball valve can be loaded on steam line with the position before the gas gauge table.Excessive or supply gas pressure jumps when overvoltage takes place when the pipeline generation combustion gas of table back, because airspeed increases rapidly in the pipe, make the reach under air-flow promotes of half ball valve central layer, valve core plate spherical surface and spool chamber taper skew wall face compress airtight applying and make pipeline gas stream quilt cut combustion and stop air feed valve closing.After pipeline rehabilitation or supply gas pressure turn ball valve core just often, the spherical that valve ball protrudes returns back to top the hemisphere spool and makes spool spherical surface and spool chamber wall remove clamping stagnation, the half ball valve central layer is retracted the position after being driven by valve core rod under the return spring effect, open ball valve again and recover normal air feed.

Claims

1, a kind of overflow-type gas safe automatic stop valve, it is characterized in that fixed position cover, half ball valve central layer, constitute with the whole valve core rod that is connected of valve core plate, valve core rod positioning and guiding support, pushing tow return spring, the location is with spool chamber and spool back cavity, the half ball valve central layer is loaded in the spool chamber, the spool chamber wall is a tapered slope, valve core rod positioning and guiding support is fixed in the setting sleeve spool back cavity, and the pilot hole that valve core rod passes on the support is bound up on the support by the pushing tow return spring that is loaded on the valve core rod.