CN2061637U

CN2061637U - Self-closing valve for liquefied gas

Info

Publication number: CN2061637U
Application number: CN 89221135
Authority: CN
Inventors: 黄德民
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-12
Filing date: 1989-12-12
Publication date: 1990-09-05

Abstract

The utility model discloses an automatic closing valve which is matched with the control valve of the existing liquefied gas range. The automatic closing valve is provided with a valve body which is controlled by a thermal expansion position limit mechanism and is provided with a piston member. The automatic closing valve can automatically close a gas path under the conditions that a gas pot main valve and a range disk adjusting valve are all opened, and the stove disk has no flame.

Description

Self-closing valve for liquefied gas

The utility model relates to a kind of liquefied gas pipeline valve.

Household liquified gas stove generally all is to be that main valve and kitchen range dish modulating valve on the gas tank comes control gaseous to enable by two valves.When on the kitchen range dish flame not being arranged because carelessness or other outside cause cause above-mentioned two valves to be opened simultaneously, liquid gas just can leak in a large number, leads to accidents such as fire, blast, even causes personal injury.In the prior art, the device that prevents gas leak mostly is the electronic alarm formula, and structure more complicated, product cost are relatively also high, and has because of the malfunctioning situation of internal cell inefficacy causing warning.

The purpose of this utility model is to provide a kind of and existing liquefied gas stove control valve matching used mechanical type automatic-closing valve.It can all be opened and the kitchen range dish does not have the flame situation and continues to close gas circuit automatically after blink at original two valves of kitchen range.

To achieve the above object of the invention, technical solution of the present utility model is: the liquid gas self acting stop valve that is provided has one by the valve body that piston piece is arranged in the control of thermal expansion position-limit mechanism.During installation valve body vertically is serially connected on the breather line of liquefied gas stove, if two valves on kitchen range and the gas tank are opened simultaneously and not igniting at once, so the air-flow in the pipeline asks the piston in moving this valve body to rise, after after a while, piston just can be sealed pipeline, the blocking-up air-flow; And, place near the position-limit mechanism expanded by heating work of kitchen range dish if in time lighted a fire, and stop the lifting position of piston surely, make air-flow unimpeded.

Below in conjunction with accompanying drawing content of the present utility model is described in detail.

Fig. 1 is the structural representation of this liquid gas self acting stop valve.

As shown in the figure, this liquid gas self acting stop valve has the valve housing chamber 1 of an internal diameter greater than kitchen range breather line internal diameter, the cylinder 3 of dress plunger piston 2 in is set up at middle part, shell chamber with one heart, there is the big step 4 of a distension lower end of piston 2, the upper end is equiped with the rubber packing 5 of a diameter greater than kitchen range breather line internal diameter and cylinder block diameter, opening a passage 6 that tilts below outwards between the same side wall surface of one side wall surface in valve housing chamber 1 and cylinder 3, along being equiped with the thermal expansion position-limit mechanism that a pair is used to limit cylinder inner carrier 2 lifting positions in this passage 6, this thermal expansion position-limit mechanism has a segment pipe 8, one end of pipeline is communicated with an air chamber 9 of being made by metallic material, described metallic material is generally used the material such as the aluminium material of good heat conductivity, the other end of pipeline 8 gos deep in the inlet valve body shell chamber passage 6, its termination point casing is provided with the air bag 10 that a rubber material with higher thermal expansion coefficient is made, the front end overhead of air bag 10 has an auxiliary spring 12 and a ball 11, and ball is positioned at the edge line at passage 6 road junctions.In addition, on the wall of the bottom in valve housing chamber 1, be provided with the switch 7 of releasing.

During use, the two-port of self acting stop valve vertically is serially connected on the breather line of kitchen range, and the air chamber in the thermal expansion position-limit mechanism 9 is placed near the kitchen range dish.After opening gas tank main valve and kitchen range dish modulating valve, by the shell chamber 1 of self acting stop valve, air-flow moves upward piston 2 jack-up to liquid gas from bottom to top.Here, because air-flow forms air negative pressure at piston 2 and 3 in cylinder, thereby piston 2 can only move up lentamente.At this moment, if the kitchen range dish is ignited, then place near its air chamber 9 expanded by heating and give air bag 10 pressurizations by pipeline 8, air bag 10 extensions promote spring 12 and ball 11 reaches, ball 11 are blocked piston 2 at the big step of distension 4 places of piston rod, so gas circuit is unimpeded; If fail igniting in time, then the thermal expansion position-limit mechanism, do not work, move on piston 2 continues, will go up breather line by the rubber packing 5 on its top at last and seal fully, air feed interrupts.

Under the normal condition, after the gas tank main valve barred up, swelling gasbag 10 shrank, and piston 2 and ball 11 etc. can rely on gravity reduction separately; And when rubber packing 5 is sealed breather line, must earlier the gas tank main valve cut out, turn on the switch 7 of releasing then, ducted liquid gas is emitted, then piston 2 just can automatically reset.

Claims

1, a kind of series connection is installed in liquid gas self acting stop valve on the household liquified gas stove breather line, it is characterized in that this cut-off valve has the valve housing chamber (1) of an internal diameter greater than the breather line internal diameter, the cylinder (3) of adorning plunger piston (2) in one is set up at middle part, shell chamber with one heart, there is the big step of a distension (4) lower end of piston (2), last end device has the rubber packing (5) of a diameter greater than kitchen range breather line internal diameter and cylinder block diameter, between the same side wall surface of the side wall surface of valve housing chamber (1) and cylinder (3), open the outwards passage (6) that tilts of below, be used to limit the hot tympanites position-limit mechanism of cylinder inner carrier (2) lifting position along being equiped with a pair in this passage (6), on the bottom wall of valve housing chamber (1), be provided with the switch of releasing (7).

2, liquid gas self acting stop valve as claimed in claim 1, it is characterized in that described thermal expansion position-limit mechanism has a segment pipe (8), one end of pipeline is communicated with an air chamber of being made by metallic material such as aluminium material (9), the other end gos deep in the inlet valve body shell chamber passage (6), its termination point casing is provided with the air bag (10) that a rubber material with higher thermal expansion coefficient is made, and the front end overhead of air bag (10) has an auxiliary spring (12) and a ball (11).