CN2544362Y

CN2544362Y - Gas protector

Info

Publication number: CN2544362Y
Application number: CN 02227040
Authority: CN
Inventors: 谭锦镛; 江桂新; 黄启照
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-16
Filing date: 2002-04-16
Publication date: 2003-04-09
Anticipated expiration: 2012-04-16

Abstract

A gas protector is used for detecting and controlling the leakage of combustible gas, comprising a sensor, a main controller, an alarm circuit, an electromagnetic valve drive circuit and an electromagnetic valve. The electromagnetic valve is provided with a rubber diaphragm between a shell and the top of a valve seat to entirely separate a electromagnetic coil and an action element from the combustible gas, without influencing the up-down movements of an armature and a valve spool; the valve spool shuts a valve port in the same direction as that of an air input, as the higher the air input pressure is, the closer the valve port shuts, the electromagnetic valve shuts the valve closely, thus being very safe and reliable.

Description

Gas protector

Technical field

The utility model relates to a kind of device to combustible gas leakage monitoring and automatic self-closing gas pipeline.

Background technology

The gas leakage control alarm such as the disclosed technical scheme of Chinese patent 00227423.X of prior art, there is following weak point in it: 1, closing the air flue valve port is to adopt to go up the pressure type structure, when malfunctioning or other accidental causes cause admission pressure excessive when reduction valve, diaphragm seal can be opened and cause gas leakage.2, owing to adopt the flat seal valve port, can produce gas leakage when seal is enclosed the particulate foreign material, in addition, after diaphragm seal was aging, surface irregularity also can produce gas leakage.

Summary of the invention

It is reliable that the technical problems to be solved in the utility model is that the air flue valve port will seal when closing, and during the ventilation of air flue valve port, electromagnetic valve coil is not charged and isolated with inflammable gas, safety and reliability.

The technical solution that the utility model proposed is such: a kind of gas protector, comprise sensor, master controller, warning circuit, driving circuit for electromagnetic valve and solenoid valve, be connected by wired or wireless between master controller output terminal and the driving circuit for electromagnetic valve input end, described electromagnetic valve body is packed on the valve seat 21, this valve seat 21 is provided with air intake opening 20, gas outlet 26 and valve port 27, skeleton 15 and coil 17 are housed in the shell 12 of described solenoid valve, armature 14 passes skeleton 15 center through hole, armature 14 stage casings of round bar shape are thicker, epimere and hypomere are thinner, be provided with spring 30 between split pin 13 that armature 14 epimeres are installed and skeleton 15 tops, reset button 11 is equipped with at this epimere top, armature 14 hypomeres are with permanent magnet ring 16, this permanent magnet ring 16 is fixed on skeleton 15 central lower, armature 14 hypomere ends are fixed with conductive pads 29, be provided with dried font spool 28 and spring 24 between the bottom 23 of valve seat 21 under this conductive pads 29, be fastened with one in shell 12 and valve seat 21 junctions and separate rubber diaphragm 18, blast tube and electromagnetic valve body are separated, conductive pads 29 is clamped this separation rubber diaphragm 18 centres with spool 28 tops, spool 28 bottom round platform peripheries are equipped with packer ring 19, and this round platform can seal the valve port 27 that is positioned at valve seat 2 the 1st cavity 22 and the 2nd cavity 25 junctions.

Compared with prior art, the utlity model has following beneficial effect: 1, adopt packer ring sealing valve port, sealing reliability height, and the direction of motion and the airintake direction of the round platform of spool sealing valve port are in the same way, so admission pressure is big more, then valve closes closely more, and sealing is more reliable.When 2, valve body was ventilated, electromagnetic valve coil was not charged and all isolated with inflammable gas from start to finish, makes the device safety and reliability.

Description of drawings

Fig. 1 is the electric theory diagram that the utility model adopts the line style gas protector.

Fig. 2 is the electric theory diagram that the utility model adopts the radio-type gas protector.

Fig. 3 is the structural representation of an embodiment of the related solenoid valve of the utility model.

Embodiment

Referring to Fig. 1, Fig. 2, shown in Figure 3, the collecting of electrical controls of the present utility model has two kinds of patterns: a kind of is that line style is arranged, and is made up of sensor 1, master controller 2, alarm 3, driving circuit for electromagnetic valve 4, solenoid valve 5.Another kind is a radio-type, is made up of driving circuit for electromagnetic valve 7, the solenoid valve 5 of sensor 1, the master controller 6 of being with radio transmission, alarm 3, band radio reception.

Solenoid valve 5 is made up of reset button 11, shell 12, split pin 13, street iron 14, permanent magnet ring 16, coil 17, separation rubber diaphragm 18, packer ring 19, valve seat 21,

spring

24,30, spool 28, conductive pads 29, skeleton 15.Rubber diaphragm 18 is separated solenoid valve 5 coil motion part with the air flue of valve seat 21, thereby it is fool proof reliable, simultaneously, the conductive pads 29 that is fixed on armature 14 lower ends is clamped rubber diaphragm 18 middle parts with spool 28 tops and is linked into an integrated entity, when armature 14 moves downward by pressing reset button 11, armature 14 is held by permanent magnet ring 16, spool 28 is also followed and is moved downward, open valve port 27, spring 24 is compressed, and combustion gas 26 is flowed out from the gas outlet through the 1st cavity 22, valve port the 27, the 2nd cavity 25 from air intake opening 20.When sensor surpasses setting valve to inflammable gas, master controller 2 signals away: one is alerting signal, another (line style is arranged) is that driving circuit for electromagnetic valve is supplied with direct current to electromagnetic valve coil, the magnetic field cancellation that electromagnetic valve coil energising this moment produces the magnetic field of permanent magnet ring 16, under compressed spring 30 effects, armature 14 moves upward, drive spool 28 is followed and is moved upward, by packer ring 19 valve port 27 is sealed fully, thereby make whole valve seat 21 close stuffiness.Because the direction of motion and the inflammable gas air inlet of spool 28 close port 27 are equidirectional, so the big more then valve port 27 of admission pressure closes tightly more, seal more reliable.And when the inflammable gas pressure that enters is low, utilize the spring force of the spring 24 that has compressed also can make valve port 27 close tightly, seal also reliable.

When adopting the wireless remote control type gas protector, the radio receiver and the executive circuit of direct current supply then are housed, in valve body one side to be fit to the varying environment requirement.

This gas protector can be widely used in occasions such as the Leak Detection of inflammable gass such as liquefied petroleum gas (LPG), rock gas and control.

Claims

1, a kind of gas protector, comprise sensor, master controller, warning circuit, driving circuit for electromagnetic valve and solenoid valve, be connected by wired or wireless between master controller output terminal and the driving circuit for electromagnetic valve input end, described electromagnetic valve body is packed on the valve seat (21), this valve seat (21) is provided with air intake opening (20), gas outlet (26) and valve port (27), it is characterized in that: skeleton (15) and coil (17) are housed in the shell of described solenoid valve (12), armature (14) passes skeleton (15) center through hole, the armature of round bar shape (14) stage casing is thicker, epimere and hypomere are thinner, be provided with spring (30) between armature (14) split pin (13) that epimere installed and skeleton (15) top, reset button (11) is equipped with at this epimere top, armature (14) hypomere is with permanent magnet ring (16), this permanent magnet ring (16) is fixed on skeleton (15) central lower, armature (14) hypomere end is fixed with conductive pads (29), be provided with dried font spool (28) and spring (24) between the bottom (23) of valve seat (21) under this conductive pads (29), be fastened with one in shell (12) and valve seat (21) junction and separate rubber diaphragm (18), blast tube and electromagnetic valve body are separated, conductive pads (29) is clamped this separation rubber diaphragm (18) centre with spool (28) top, spool (28) bottom round platform periphery is equipped with packer ring (19), and this round platform can seal the valve port (27) that is positioned at valve seat (21) the 1st cavity (22) and the 2nd cavity (25) junction.