CN2370235Y

CN2370235Y - Automatic closing valve for pipeline gas

Info

Publication number: CN2370235Y
Application number: CN 98232867
Authority: CN
Inventors: 朱皓生; 薛国栋
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-23
Filing date: 1998-07-23
Publication date: 2000-03-22
Anticipated expiration: 2008-07-23

Abstract

The utility model relates to an automatic closing valve for pipeline gas, which belongs to an automatic closing valve. The utility model comprises a valve cover, a valve rod, a gas sensing alarm, a shell, a gas inlet mouth, a gas outlet mouth, a magnet, a membrane, etc. The utility model is characterized in that an insulation sleeve is sheathed on the valve rod, and is a telescopic structure. The exterior of the insulation sleeve is wound with a temperature changing wire which is communicated with an electric conduction wire. The utility model mainly depends on the deformation generated by the temperature changing wire to link a fuel gas valve to be automatically closed. Therefore, compared with the automatic closing valve with an electromagnetic structure, the utility model has the advantages of simple structure, and low cost.

Description

A kind of pipeline gas self acting stop valve

The utility model belongs to self acting stop valve, particularly a kind of pipeline gas self acting stop valve.

A kind of pipeline gas self acting stop valve is arranged at present, it is pressured poor, magnetic force, action of gravity self acting stop valve when stopping the supple of gas or steam, as application number is 962355178, the pipeline gas valve that pressured poor, magnetic force, action of gravity were closed automatically when the patent application that name is called the combustion gas autocontrolled safety valve disclosed this stopping the supple of gas or steam, this valve has solved the problem of cutting out automatically when dying, if but can't automatic-closing valve when gas leakage takes place.Also has a kind of electromagnetism combustion gas self acting stop valve, the problem of closing automatically when it can solve gas leakage, but its complex structure, cost of production height, outward appearance clumsiness.

The purpose of this utility model is at the problems referred to above, provides a kind of simple in structure, and cost of production is low, appearance looks elegant, the pipeline gas self acting stop valve that can both close automatically when dying and leak.

The technical solution of the utility model is, it improves design on the basis of former number of patent application 962355178 combustion gas autocontrolled safety valves, it comprises compositions such as valve gap, valve rod, air-sensitive alarm, housing, turnover gas are chewed, magnet, diaphragm, it is characterized in that: be with insulating bush on valve rod, insulating bush is a shrinking structure; Insulating bush is around with temperature and becomes wire, and temperature becomes wire and is communicated with electric lead.

Described temperature becomes wire and is spring-like memory alloy wire.

The insulating bush top of described Collapsible structure contacts with housing, and low side is pressed on the elastomer diaphragm.

Described insulating bush can be divided into and overlapping and the branch body structure of trapping.

Characteristics of the present utility model are as follows:

1, simple in structure, cost of production is low, and is elegant in shape attractive in appearance.

It mainly becomes wire generation deformation interlock gas valve by temperature closes automatically, and therefore simple in structure than the self acting stop valve of electromagnetic structure, cost is low.

2, when dying and leak, can both close automatically.

Owing to the self acting stop valve of the utility model design is to be 962355178 at number of patent application, to increase temperature on the architecture basics that name is called the combustion gas autocontrolled safety valve and become wire, insulating bush, air-sensitive alarm and constitute, so its keep original product can be when dying the characteristic of self acting stop valve, when leaking, become wire again and produce the deformation automatic-closing valve by air-sensitive alarm control temperature.

3, Sefe antiexplosion can not produce electrical spark, and circuit is closed circuit connection, the contactless switch structure.

Below in conjunction with embodiment's accompanying drawing the utility model is described further.

Accompanying drawing 1 is the utility model example structure schematic representation.

Shown in the figure: 1, valve gap; 2, valve rod; 3, insulating bush; 4, housing; 5, temperature becomes wire; 6, elastomer diaphragm; 7, magnet; 8, valve plug; 9, air inlet is chewed; 10, give vent to anger and chew; 11, electric lead; 12, air-sensitive alarm.

As shown in the figure, when pipeline gas leaks, air-sensitive alarm 12 begins to report to the police, and the conducting temperature of powering simultaneously becomes wire 5, after temperature becomes wire 5 connection power supplys, produce temperature variation, cause temperature to become wire 5 deformation, promptly the spring-like temperature becomes the elongation of wire 5 length, because insulating bush 3 tops contact housing 4, can't extend,, force the elastomer diaphragm 6 interlock valve rods 2 that are pressed in insulating bush 3 bottoms to move downward so the bottom of the insulating bush 3 of shrinking structure becomes wire 5 elongations with the spring-like temperature, valve is closed automatically, when leakage failure is got rid of, make insulating bush 3 and temperature become wire 5 with portable valve gap 1 and restore to the original state, gas valve is opened.When pipeline gas is died, the magnetic force of parts gravity such as its pressured difference and valve rod and magnet 7, automatic-closing valve.

Claims

1, a kind of pipeline gas self acting stop valve, it comprises compositions such as valve gap, valve rod, air-sensitive alarm, housing, turnover gas are chewed, magnet, diaphragm, it is characterized in that: be with insulating bush on valve rod, insulating bush is a Collapsible structure, and insulating bush is around with temperature and becomes wire, temperature becomes wire and is communicated with electric lead, after the air-sensitive alarm is given the power supply of temperature wire, can make wire produce change in shape, impel insulating bush bottom, diaphragm and valve rod to bottom offset, make valve closing, cut off source of the gas.

2, according to the described a kind of pipeline gas self acting stop valve of claim 1, its feature also is: described temperature becomes wire and is spring-like memory alloy wire.

3, according to the described a kind of pipeline gas self acting stop valve of claim 1, its feature also is: the insulating bush top of described Collapsible structure contacts with housing, and low side is pressed on the elastomer diaphragm.

4, according to the described a kind of pipeline gas self acting stop valve of claim 3, its feature also is: described insulating bush can be divided into and overlapping and the branch body structure of trapping.