CN2221693Y

CN2221693Y - Gas safety valve

Info

Publication number: CN2221693Y
Application number: CN 95215810
Authority: CN
Inventors: 高广兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-06
Filing date: 1995-07-06
Publication date: 1996-03-06
Anticipated expiration: 2005-07-06

Abstract

The utility model relates to a gas safety valve. An air inlet chamber (2) and an air outlet chamber (1) are arranged in a valve body (4) and are communicated with each other by a valve hole (3) which is plugged by a valve plug (5). The two end heads of a wire coil (54) is connected with a heat receiving point on the wire leading end (6) of the thermocouple of the firing point of a cooker, a push rod (120) is pressed, the cooker is ignited, the valve plug is kept on a position departing from the valve hole by the attraction of the wire coil, gas is normally supplied, and once the cooker is extinguished, the valve plug returns a position plugging the valve hole to cut off gas supply. When the burning holes of the cooker are accidentally extinguished, the safety valve has no unburned gas leakage and ensures using safety, having simple structure, convenient operation and no additional energy source.

Description

Safety valves for gas

The utility model relates to safety valves for gas, particularly, relates to the self-closing pressure regulator of adjustable pressure.

Combustion gas current be important domestic fuel, wherein coke-oven gas and rock gas use to kitchen range by line transportation, liquefied petroleum gas (LPG) is then irritated into bottled, through reduction valve decompression back use.Use the kitchen range of above liquefied petroleum gas (LPG) or pipeline gas to have following point: as in use cooking stove is unattended, owing to reasons such as wind, kettle or slaughterhouse overflow are extinguished fire, combustion gas will be flowed out outside the kitchen range, and accumulating when too much has explosion risk as naked light, and the people is poisoned.

The purpose of this utility model provides a kind of safety installations, can make fire cut off source of the gas once extinguishing, and guarantees to guarantee safe in utilization outside the not combustion gas outflow kitchen range.

Another purpose of the present utility model provides a kind of LP gas cylinder pressure regulator, does not have the liquefied petroleum gas (LPG) of combustion in the time of also making the kitchen range accident extinguishing and flows out outside the kitchen range, guarantees safety.

The purpose of this utility model is achieved through the following technical solutions.

Set up suction chamber separately in the valve body of this real New-type safety valve and discharge chamber is communicated with by valve opening, valve opening is withstood and blocked by spring by the valve plug that is arranged in one of described air chamber, and it is obstructed that suction chamber and discharge chamber are separated; The valve plug rear end is provided with armature and the electromagnetic coil on the iron core, and coil two terminations and thermocouple two lead ends join, and thermocouple is subjected to warm spot to be located at cooking stove point of ignition place; Above-mentioned valve plug the place ahead has push rod to pass valve body to stretch out outside the valve, press push rod and can make valve plug leave valve opening, when armature is attached on the iron core, point of ignition is in combustion regime, thermocouple makes the electromagnetic coil holding armature at attracting state, and valve opening keeps and open, and combustion gas is constantly supplied, in case it is flame-out, armature resets under spring action together with valve plug, blocks valve opening, cuts off source of the gas, even switch does not cut out on the kitchen range, can not spill yet and not fire combustion gas.

The simple structure of the utility model safety valve utilization is not used the other energy, can reach aforementioned goal of the invention, when promptly the kitchen range eye is flame-out, and gas supply capable of blocking, even accident extinguishing does not have combustion gas yet and releases, the danger of exempting blast and poisoning.The use that the self-closing reduction valve of adjustable pressure of the present utility model makes liquefied petroleum gas (LPG) is adjustable in pressure not only, does not have the phenomenon of building the pressure by the self-closing low voltage side that acts on, even and do not have the liquefied petroleum gas (LPG) of combustion during accident extinguishing yet and escape, guarantee safety.

Fig. 1 is the first example structure schematic representation of the utility model safety valve.

Fig. 2 is the second example structure schematic representation of the utility model safety valve.

Below in conjunction with accompanying drawing in detail preferred embodiment is described in detail.

Fig. 1 is first embodiment, valve body 4 is arranged, its inside comprises suction chamber 2 and discharge chamber 1, respectively be provided with suction port 21 and air outlet 11, there is valve opening 3 to communicate between two Room, be positioned at described air chamber 1, when the valve plug 5 in one of 2 is blocked valve opening 3,

air chamber

1,2 cut off, and valve plug 5 rear ends are connected with armature 52 in the face of the coil of wire 54 on iron core 53, the coil of wire 54 2 terminations are connected with fairlead 6 lead-in wires of the thermocouple that is arranged in point of ignition, when the coil of wire 54 is subjected to electricity, promptly point of ignition is in combustion regime, and armature 52 is again with 53 position contacting unshakable in one's determination the time, it will be attracted and be remained on this position, be that valve plug 5 is in and leaves valve opening 3 and make

air chamber

1,2 positions that communicate, on the contrary point of ignition does not burn, the spring 51 that is located under the valve plug 5 resets valve plug, block valve opening 3,

air chamber

1,2 cut off, and cut off fuel gas supply passage.

Because the potential source energy of thermocouple is little, for reducing the electromagnetic mechanism volume, the push rod 120 outer power that the action of initial movable armature 52 and valve plug 5 is located at valve plug 5 the place aheads by other are pushed away and are pushed valve plug 5 when pressing pole cap 121 and realized, resetting of push rod 120 realizes by spring 122 or by spring 51, the push rod component 12 that has comprised push rod 120, pole cap 121, spring 122 is contained on the valve body 4 by sealing gasket 123, and is air tight to guarantee.The cypriot valve components 13 that comprises parts such as valve plug 5, spring 51, armature 52, iron core 53 and the coil of wire 54, contiguous block 133 installs in the suction chamber of valve body 4 by sealing gasket 131 usefulness caps 132 the assembling back in advance, one termination of the coil of wire 54 links to each other with contiguous block 133, and draw from piece 133 central holes on its second termination and piece 133 insulation ground; The metal pipe-wall of thermocouple lead pipe 6 is as a lead-in wire of thermocouple, when fairlead 6 is screwed on the contiguous block 133 of cypriot valve components by attachment cap 61, the wall and contiguous block 133 electric connections of pipe 6, promptly the end with the coil of wire is communicated with, second of the thermocouple lead-in wire insulate ground by being crimped on contiguous block 133 central authorities with the ball 62 that is connected of pipe (6) and contiguous block (133) insulation respectively with the wall of managing 6 in the pipe 6, be connected with second termination of the coil of wire 54, thus the connection of the formation thermocouple and the coil of wire.

Fig. 2 is second embodiment's a structural representation.

Present embodiment is a kind of pressure regulator that is applied in LP gas cylinder, and its structure arrangement is that patented technology and the first embodiment's safety valve that the application in 1989 that the applicant is all and No. 89215094.7 names of having authorized are called the self-closing reduction valve ＂ of ＂ can regulate is combined into the self-closing pressure regulator scheme of the can regulate that is used for LP gas cylinder.The identical part of figure neutralization first embodiment will have identical label, and the content of above-mentioned No. 89215094.7 patent documents will for simplicity's sake, no longer repeat as the disclosed part of the application herein.

31 are the decompression pressure membrane among Fig. 2, be clipped between the upper and

lower shell

35,46, be provided with film fixed plate 32, clamping nut 33, pressure regulation bar 37, upper spring 36 each several parts that being aligned is arranged on the film that film is limited by upper casing 35 more than 31 in the intracavity space, what push down upper spring 36 is to stretch out in upper casing 35 adjusting pressuring knob 34 in addition, regulates adjustable levers 37 axial pressures by described knob 34; Have spiracle 47 on the upper casing 35; The space that film is limited by lower casing 46 below 31 is suction chamber 2 or the film lower inner cavity space that is communicated with described suction chamber 2 among first embodiment, shown in Fig. 2 is this situation in back, the aperture that is communicated with substitutes the suction port 21 of suction chamber 2 among first embodiment, suction port 21 moves to be located on the lower casing 46, in described film lower inner cavity space, be provided with: nozzle of air supply 211 on the suction port top, connecting rod 39 and lower spring 38 with 37 one-tenth one axis of adjustable lever, cross bar 40, fulcrum 41 and valve pad 42 each several parts that are located at cross bar 40 1 ends for the described nozzle 211 of obstruction, under the normal condition, the pressure of suction chamber 2 is that the pressure (rated pressure) in film lower inner cavity space should make cross bar 40 be in its valve pad 42 nonchoking nozzles 211 positions, and when being higher than rated pressure, cross bar 40 be subjected to adjustable lever 37 and connecting rod 39 move control, make valve pad 42 plug nozzles 211, thereby suction chamber pressure is no longer raise.In this example, the pressure that rated pressure is regulated upper spring 36 by knob 34 is adjusted, and adapts to the different user needs.In this example, valve body 4 among the lower casing 46 and first embodiment is made an integral body, be with suction chamber 2 and film lower inner cavity spatial communication by opening, every other each several part structure and first is implemented identical, cut off the function of source of the gas during accident extinguishing and safe effect is also the same with first embodiment exists, repeat no more.Suction port moves and is located at appropriate location on the lower casing 46 in this example, and the suction tude peripheral hardware fastening nut 45 of formation suction port, sealing gasket 43, filter screen 44 etc. are for the usefulness that is connected with liquefied petroleum ga steel cylinder, and this has been extensive use of, and need not describe in detail.

Claims

1. a safety valves for gas is characterized in that establishing the suction chamber (2) and the discharge chamber (1) that are communicated by valve opening (3) in valve body (4), describedly is respectively equipped with suction port (21) and air outlet (11) into and out of air chamber; The valve plug (5) that described valve opening (3) is located in one of described air chamber (1,2) is blocked by the spring (51) of supporting valve plug (5); Valve plug (5) rear end is connected with armature (52), and described armature (52) is in the face of the coil of wire (54) on (53) unshakable in one's determination, and the described coil of wire two terminations are connected in the lead-in wire of a thermocouple, and the heating end of described thermocouple is located at the point of ignition place; Valve plug (5) left valve opening (3) when armature (52) was in the position of adhesive on unshakable in one's determination (52), the coil of wire (54) outage, and spring (51) makes armature (52) reset together with valve plug (5) and blocks valve opening (3); A push rod (120) is positioned at valve plug (5) anterior position, and described under external force push rod (120) is pushed described valve plug (5) to rear, initially is displaced to the armature attracted position together with armature (52).

2. according to the safety valves for gas of claim 1, it is characterized in that having a reduction valve and described valve body (4) to be combined into one, described reduction valve comprises the upper casing (35) and the lower casing (46) of mutual fastening, accompany pressure membrane (31) between the described upper and lower shell, be provided with pressure regulation bar (37) in the intracavity space on the film that limits by shell (35) more than the film (31), regulate the pressure that is pressed in the upper spring (36) on the described pressure regulation bar (37) by stretching out in the outer adjusting pressuring knob (34) of described upper casing (35); Film lower inner cavity space that is limited by lower casing (46) under the described film (31) and described suction chamber (2) are communicated with, and are suction chamber (2) with described film lower inner cavity space perhaps; In described film lower inner cavity space, be provided with the connecting rod (39) that withstands mutually with described pressure regulation bar (37) barrier film (31), set spring (38) under the connecting rod (39) and between the shell (46), connecting rod (39) is gone up hinged cross bar (40), described cross bar (40) moves with connecting rod (39) by fulcrum (41) and around fulcrum (41) revolution, makes the valve pad (42) that is located on cross bar (40) the other end block or open and be located at the nozzle (211) that lower casing (46) is gone up the suction port top.

3. according to the safety valves for gas of claim 1 or 2, it is characterized in that a termination of the described coil of wire (54) is electrically connected with contiguous block (133), draw from contiguous block (133) central hole on its second termination and described contiguous block (133) insulation ground; One of described thermocouple lead is its spool (6) tube wall, fairlead (6) is connected in contiguous block (133) by attachment cap (61), form the wall of fairlead (6) and the electric circuit of contiguous block (133), draw from pipe (6) on described thermocouple second lead-in wire and pipe (6) tube wall insulation ground, electrically contacts with described thermocouple second lead-in wire and the coil of wire (54) second terminations respectively with the ball (62) that is connected that pipe (6) and contiguous block (133) all insulate.