CN2291545Y

CN2291545Y - Automatic stop valve for fuel gas

Info

Publication number: CN2291545Y
Application number: CN 97206442
Authority: CN
Inventors: 梁天文
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-27
Filing date: 1997-01-27
Publication date: 1998-09-16
Anticipated expiration: 2007-01-27

Abstract

The utility model relates to a safe prepositional stop valve which can close the air supply automatically after fuel gas in pipelines leaks. The utility model is composed of a valve body, mechanical parts for closing the valve body, an electromagnetic mechanism and an emergency hand-operating mechanism for controlling the mechanical parts, and a stroke for cutting off the magnetic circuit; the utility model is used by matching with a leakage alarm. When an alarm warns by sending out electrical signals, the stop valve automatically closes and simultaneously cuts off the power supply of electromagnetic coils to prevent explosion accidents caused by heating coils. The utility model has the advantages of good sealing property, high safety, low power consumption, large flux, etc.

Description

Flammable gas automatic stop valve

The utility model relates to a kind of gas pipeline valve, after particularly inflammable gas leaks, can close the preposition stop valve of security personnel of source of the gas automatically.

At present, people adopt gas alarm device usually in order to prevent that inflammable gas from being leaked, and this warning device, generally only sound, light warning function owing to do not combine with valve, so report to the police and can only report to the police, can not block air-flow automatically; Even state-of-the-art warning device also only has the function of automatic unlatching venter, still be difficult to ensure the safe way of gas pipeline.For this reason, Patent Office of the People's Republic of China has announced that notification number is CN2110790u, and name is called the patent of " combustible gas leakage stop valve ", and it can be reported to the police, and can cut off the pipeline source of the gas automatically effectively again; But close mechanical control mechanism complexity, behind the valve closing, electromagnetic coil power supply that can not automatic stop valve, cause the long-term electricity consumption of electromagnetic coil easily after, temperature raises, and causes the explosion of fire damp accident.

The purpose of the utility model is to provide a kind of can close pipeline automatically after combustible gas is leaked, can in time cut off the automatic safe stop valve of coil power supply circuit again.

The inflammable gas automatic stop valve is by valve body, and the electromagnetic mechanism of the mechanical part of valve body and control mechanism parts and emergent man-operated mechanism are formed.Mechanical part comprises the housing that is fixed on the valve body, and the wave epithelium valve that is contained between housing and the valve body is stifled, and the valve rod of roof pressure on valve is stifled is contained in the spring on the valve rod, is fixed on valve stem tip and stretches out the outer handle of cap.Valve vent stifled and on the valve body is relative, and card has the locking plate of start-stop action usefulness on the valve rod; Stir locking plate, can make valve rod under the effect of elastic force, valve is blocked be pressed on the vent of often opening in the valve body.

Iron core in electromagnetic mechanism comprises the coil that is contained on the housing and places coil and relative iron core dead axle are fixed on the armature on the housing.Locking plate is fixed on the armature.

Man-operated mechanism is that an end is stretched the button of closing outside housing, and the other end of closing button can touch mutually with armature, stirs to close button and can drive the armature dead axle and rotate.

The utility model also can be loaded onto the position limit switch that joins with electromagnetic coil in housing, the button of position limit switch top is provided with an end and is fixed on depression bar on the valve rod, and when valve rod was displaced downwardly to the valve closing position, depression bar pushed button just and cuts off circuit.

The supporting use of the utility model and leakage alarm, preposition before the pipeline source of the gas; Under normal circumstances, automatic stop valve is often opened, and inflammable gas is by the normal air feed of stop valve.If there is pipeline gas to leak, leakage alarm is just reported to the police automatically, exports electrical signal simultaneously; After stop valve was received telecommunications, electromagnetic coil got electric, and armature is inhaled and opened locking plate on the valve rod, and spring promotes valve rod, valve is stifled moves down, the closed vent hole, thus realized that electromagnetism closes the function of valve.In the throttle down action, position limit switch cuts off the power supply of electromagnetic coil, makes neither consumed power of the bigger electromagnetic coil of power, can avoid coil heating to cause the accident of gas explosion again.After indoor inflammable gas was discharged, the people was for mentioning handle, and vent is opened, and locking plate blocks valve rod again, and automatic stop valve has recovered the standby condition of automatic cut-off again.

Below in conjunction with embodiment shown in the drawings the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

The inflammable gas automatic stop valve is made up of the mechanical part of valve body 17, valve body 17 and the electromagnetic mechanism and the emergent man-operated mechanism of control mechanical part.

The screw thread that valve body 17 two ends have pipeline to connect, valve body 17 middle parts are perpendicular to having a vent of often opening 16 on the tube's axis, the useful housing 7 in vent 16 tops blocks up 16 with the waveform epithelium valve that its sealing is fastened on the valve body 17, when valve stifled 16 is in nature, with vent 16 spacing is arranged, be embedded with pressure pad 15 in the middle of the valve stifled 16, the housing 7 of pressure pad 15 tops has a cylinder 14 of making one with it relatively, be equipped with valve rod 8 on the cylinder 14, be with spring 13 on the valve rod 8, spring 13 upper ends are supported by cylinder 14, and the lower end is by the prominent location of the shoulder of valve rod 8 bottoms, valve rod 8 tops are shaped on is with externally threaded thin neck bar and draw-in groove, is fixing the handle 1 that stretches out cap 2 on the thin neck bar; Be inserted with locking plate 4 in the draw-in groove, locking plate 4 is made one with armature 11, armature 11 is fixing by axle 26, one termination of armature 11 disc type Returnning spring 12, Returnning spring 12 outer ends connect with housing 7, it is by Returnning spring 12 pulling armature 11 that vent 16 is often opened, and locking plate 4 is stuck in valve rod 8 draw-in grooves, and stop valve rod 8 moves down formed.The other end both sides of armature 11 are respectively equipped with electromagnetic mechanism and the emergent man-operated mechanism of stirring its rotation.

Electromagnetic mechanism comprises with screw 24 and is fixed on support 22, the electromagnetic coil 25 on the housing 7 and is contained in iron core 23 in the electromagnetic coil 25 that iron core 23 is relative with armature 11; When electromagnetic coil 25 energisings, iron core 23 adhesive armatures 11 drive locking plate 4 and depart from draw-in groove.Also fixing the circuit board 22 that is connected with tutorial light 20 on the support 22.

Emergent man-operated mechanism is one and closes button 5, closes button 5 usefulness nuts 7 and slides on the bar shaped that is fixed on housing 7 sidewalls rises as high as the banks, and the one end is stretched and make the plate handle outside housing 7, and the other end touches mutually with armature 11; When promoting to close button 5, armature 11 rotates and drives locking plate 4 and departs from draw-in groove.

Cylinder 14 outer fixing position limit switch 19, and 19 liang of end lines of position limit switch are connected in series with tutorial light 20, electromagnetic coil 25 respectively, and there is a depression bar 10 button 18 tops of position limit switch 19, and depression bar 10 1 ends are fixed on the valve rod 8 with nut 3, and with valve rod 8 motions; When valve rod 8 is displaced downwardly to when making valve stifled 9 seal up vent 14 positions depression bar 8 lucky actuation button 18 cut-out electromagnetic coils 25 circuit.

During the supporting use of the utility model and leakage alarm, tutorial light 20 is bright, and illustrating has electrical signal on the alarm, must not artificially spur handle, otherwise burn out electromagnetic coil 25 easily, thereby improve the Security that the utility model uses.

Obviously, the utlity model has good seal performance, safe and reliable, the power consumptive province, advantage such as flux is big is particularly suitable for doing the leakage security personnel foreline valve of natural gas conveyance conduit.

Claims

1, a kind of inflammable gas automatic stop valve is made up of the mechanical part of valve body (17), valve body (17) and the electromagnetic mechanism and the emergent man-operated mechanism of control mechanical part, it is characterized in that:

A, described mechanical part comprise the housing (7) that is fixed on the valve body (17), be contained in the epithelium valve stifled (9) between housing (7) and the valve body (17), the valve rod (8) of roof pressure on valve stifled (9), be enclosed within the spring (13) on the valve rod (8), be fixed on valve rod (8) top and stretch out the outer handle (1) of cap (2), valve stifled (9) is relative with vent (16) on the valve body (17), and valve rod (8) is gone up to block has start-stop to move the locking plate (4) of usefulness;

Iron core (23) in b, described electromagnetic mechanism comprise the electromagnetic coil (25) that is contained on the housing (7) and place electromagnetic coil (25) and the armature (11) on relative iron core (23) dead axle (26) stationary housing (7), locking plate (4) is fixed on the armature (11);

C, described man-operated mechanism are that an end is stretched close button (5) outside housing (7), and the other end of closing button (5) touches mutually with armature (11), stir to close button (5) and can drive armature (11) dead axle (26) and rotate.

2, flammable gas automatic stop valve according to claim 1, it is characterized in that: the position limit switch (19) that is connected with electromagnetic coil (25) is housed in the housing (7), the button (18) of position limit switch (19) top is provided with an end and is fixed on depression bar (10) on the valve rod (8), when valve rod (8) when being displaced downwardly to valve closing, depression bar (10) pushes button (18) just and cuts off circuit.