CN2455970Y

CN2455970Y - Automatic controlled gas valve

Info

Publication number: CN2455970Y
Application number: CN 00256584
Authority: CN
Inventors: 舒国平
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-01
Filing date: 2000-12-01
Publication date: 2001-10-24
Anticipated expiration: 2010-12-01

Abstract

The utility model discloses an automatic control combustible gas valve, which uses gas pressure to control a switch, and a pneumatic unit producing the gas pressure is controlled by a gas-sensitive unit and a timer. The utility model alarms when combustible gas leaks and the timing ends, and the timer and a gas cylinder are separated. The automatic control valve with the structure increases safety and is convenient in use.

Description

The inflammable gas autocontrol valve

The utility model relates to a kind of inflammable gas autocontrol valve.

A kind of decompressor that uses on original liquified petroleum gas cylinder has only the effect of decompression pressure regulation, does not have the function of recloser, and each break-make source of the gas all will be operated by the people, in case forget the hidden danger that just stays danger.Occurred the mechanical wind-up timer of a kind of usefulness afterwards again and controlled the pressure regulator valve of gas source switch, and accessed the time that gas is opened in expectation with timer when with gas, then source of the gas is turned off by timer in the back.The shortcoming of this pressure regulator valve is that timer must be installed on the steam outlet pipe of source of the gas, because to the clean and tidy consideration in kitchen, generally gas cylinder is placed below the operation panel of kitchen cabinet, even also loads onto the cabinet door concerning the gas cylinder user.Very inconvenient when operation timer.In addition, after timer is turned off source of the gas, can not in time send corresponding signal, influence next step operation.Also have a kind of device with air-sensitive controller control gas source switch, its gas source switch valve is a solenoid valve, and solenoid valve is required to have explosion-proof performance, and the cost height if explosion-proof performance is bad, influences and uses gas safety.

The purpose of this utility model just provides the inflammable gas valve that the enough air pressures of a kind of energy are controlled its switch, this valve can be controlled open and close to the control that produces compressed-air actuated pneumatic unit indirectly by air-sensitive controller and timer, so just can realize that timer separates with gas cylinder, can send signal when regularly finishing, also can cut off source of the gas automatically to leakage alarm.

In order to achieve the above object, the technical solution of the utility model is: in the pressure governor of prior art, increase a pneumatic valve by air-pressure controlling, the switch of this valve again by air-sensitive controller and the wind-up timer that separates with this valve by the control that produces compressed-air actuated pneumatic unit being realized control to gas source switch.

The pressure governor of described pneumatic valve and prior art places in the same bubble-tight housing, and this housing has an air intake, an air outlet.Described pneumatic valve mainly is made up of pneumatic lever, return spring, a pneumatic membrane.Below one end of pneumatic lever is return spring, goes up the air film center facing to pressure governor, and this air film is by the opening degree of pressure regulation lever control air intake; The other end of pneumatic lever is connected with described pneumatic membrane, is pneumatic cavity under the pneumatic membrane, and it has an air intake to be connected with pneumatic unit.

Produce compressed-air actuated pneumatic unit and be made up of air compression tube, motor and reduction gear, motor shrinks by a belt pulling air compression tube after slowing down, and produces pressurized air and goes to drive the pneumatic valve action.The work of this motor is controlled by two position limit switches.

The function of described gas sensor unit is: when the finite concentration combustible gas is arranged in the air, just send the acoustooptic alarm signal, and the break-make of may command external circuit, its control switch is connected on the power loop of pneumatic unit, so that when combustible gas leaks, cut off the power supply of pneumatic unit, also promptly closed the source of the gas of combustible gas.This element also sends alert signal when regularly finishing.

At the control end of the described timer switch of also can connecting, be used for cutting off at any time source of the gas.

Above-mentioned inflammable gas autocontrol valve is opened and is opened and closed owing to adopted by air-pressure controlling, makes it safer; Because it has increased switch valve on the basis of original pressure governor, so simple in structure, cost is low; It also can control its switch by the gentle sensitive controller of timer that separates with it, uses more conveniently, and can increase function to regularly end and combustible gas leakage alarm.

Below in conjunction with drawings and embodiments the utility model is described further.

Fig. 1 is a combination block diagram of the present utility model.

Fig. 2 is the cross-sectional schematic of pneumatic valve of the present utility model.

Fig. 3 is the structural representation of pneumatic unit of the present utility model.

Fig. 4 is a pneumatic unit of the present utility model, the profile schematic representation that gas sensor unit, timer are combined.

Figure 1 illustrates combination block diagram of the present utility model.Source of the gas X among the figure is transported to on the gas utensil V by pneumatic valve W, and source of the gas X mainly is meant gas cylinder.The open and close of pneumatic valve need gas pressure to control, and the air outlet that produces the pneumatic unit U of gas pressure is connected on the pneumatic valve.The action of pneumatic unit U is controlled by gas sensor unit S and timer T respectively again.The working procedure of whole device is: when needs are used combustible gas, can be according to regulating timer T on corresponding time location with the length of gas time, the power supply that this moment, timer T connected pneumatic unit U makes it produce the air of certain pressure, this pressurized air is opened pneumatic valve W, and combustible gas is switched to on the gas utensil V.When the timing of timer T finished, it controls pneumatic unit U closed pneumatic valve W.The K switch of having connected on the control end of timer T so that in the work that stops pneumatic unit U midway at any time regularly, is turn-offed source of the gas.If there is combustible gas to leak in the process that source of the gas is opened, gas sensor unit S will send alarm signal, and the time spent stops the work of pneumatic unit U, in time cuts off source of the gas.When the timing of timer T finishes, also can send corresponding alert signal, so that the people of notice usefulness gas carries out later work.

The generalized section of pneumatic valve W has been shown among Fig. 2.6, one air outlets 14 of a suction port are arranged on bubble-tight housing 15.Dotted line in housing 15 is the pressure governor part of prior art with top, its working principle is roughly: when suction port 6 has the high pressure combustible gas to come in, A end jack-up with pressure regulation thick stick 5, combustible gas enters the below of air film 4 in the housing 15, along with air pressure strengthens, air film 4 is upwards heaved, and with pressure adjusting spring 2 compressions of top, the A end of the bar of pressure regulation simultaneously 5 moves down, intake resistance strengthens, the pressure of housing 15 Lower Halves reduces, and under the effect of pressure adjusting spring 2, the B of pressure regulation bar 5 end moves down again, then its A end moves up again, air inflow increases again, and the elastic force of last air pressure and spring 2 reaches balance, makes to keep certain pressure in the housing.Regulate the adjusting pressuring knob 3 on the pressure adjusting spring 2, can change the elastic force of spring 2, reach the purpose of pressure regulation.

Lower half portion of dotted line is the major component of pneumatic valve W of the present utility model in housing 15.Below the pressure regulation bar 5 on top, a pneumatic lever 10 is arranged, its C end be positioned at pressure regulation bar 5 the B end under, above the C of pneumatic lever 10 end, be locating slot 8, below the B of pressure regulation bar 5 end, be connected with a catch bar 7, crouch in locating slot 8.Below the C of pneumatic lever 10 end is a return spring 9, is that the D end connects a pneumatic membrane 11 at the other end, is a pneumatic cavity 12 below it, and connected is pneumatic port 13.

The working procedure of pneumatic valve W is: after pneumatic port 13 inserted the air of certain pressure, pneumatic membrane 11 was upwards heaved the D end that drives pneumatic lever 10 and is moved up, and then the C end moves down, and locating slot 8 breaks away from the catch bar 7 that crouches in it.This moment, the pneumatic valve part did not influence the proper functioning of pressure regulation part.Owing to the effect of return spring 9, the D end that pneumatic membrane 11 drives pneumatic lever 10 moves down after the air pressure of pneumatic port 13 is removed, and then the C end moves up, and the B end of jack-up pressure regulation bar 5 makes its A hold to move down and blocks suction port 6, reaches the purpose of closing source of the gas.

Shown in Figure 3 is the structural representation of pneumatic unit U.An air compression tube 31 is arranged in support 38, and its barrel is circular folding structure, also other shape.One end of compression cylinder 31 seals, and the other end and base 37 link together.In the tube motor 33 is arranged, the axle of motor 33 is gone up and is connected a cover speed change gear 34, and the gear after the speed change connects a take-up spool 35, and there is a belt 36 at the center, top with compression cylinder on take-up spool 35.One air outlet 32 is arranged on base 37.The position limit switch of control motor 33 working staties also is installed on support 38.

The working method of pneumatic unit U is: opened the power supply of the motor 33 of pneumatic unit U when regulating timer, motor 33 is rolled belt 36 by take-up spool 35 and driven compression cylinder 31 after slowing down top moves down pressurized air, and air pressure is connected on the pneumatic valve W through tracheae from air outlet 32.When compression cylinder arrives certain position, stop operating by position limit switch control motor 33.When timer T regularly finishes, make motor 33 counter-rotatings by control circuit again, compression cylinder 31 is decontroled returned to original shape.

What Fig. 4 represented is the profile schematic representation that gas sensor unit S of the present utility model, pneumatic unit U and timer T combine.The working power tutorial light 41 that gas sensor unit S is arranged on the panel among the figure, the indication 42 of reporting to the police, playback mouth 43 regularly finishes to inform tutorial light 44.

Claims

1, a kind of inflammable gas autocontrol valve, comprise air-sensitive control unit (S), pneumatic unit (11) and pneumatic valve (W) are formed, it is characterized in that: the opening and closing of described pneumatic valve (W) are by the air pressure control of pneumatic unit (U), be connected by a tracheae between the air outlet (32) of the air compression tube (31) of pneumatic unit (U) and the gas control mouth (13) of pneumatic valve (W), when using combustible gas, open pneumatic unit (U) its generation certain pressure is applied in the pneumatic cavity (12) of pneumatic valve (W) by tracheae, pneumatic valve (W) is opened; The control interface of gas sensor unit (S) links to each other with pneumatic unit (U), and when combustible gas had leakage, gas sensor unit (S) output acoustooptic alarm signal cut off pneumatic unit (U) simultaneously, and pneumatic valve (W) is closed; Control end with timer (T) is connected with pneumatic unit (U), and after regularly finishing, timer (T) control pneumatic unit (U) is closed pneumatic valve (W), sends the alert sound signal simultaneously.

2, inflammable gas autocontrol valve according to claim 1, it is characterized in that: described pneumatic valve (W) is made of air pressure adjustment part and pneumatic lever assembly, two-part all place in the airtight housing (15), at the one end suction port (6) are arranged, and entering is high pressure air; The other end is air outlet (14), what send is for the low pressure gas of using, in the bottom of housing (15) is gas control mouth (13), be connected to the air outlet (32) of pneumatic unit (U), described air pressure adjustment part-structure is: a pressure regulation bar (5) is arranged near described suction port (6), be lever construction, its A end is facing to suction port (6), B end top heads on the center of pressure regulation air film (4), this air film is divided into the housing (15) of whole pneumatic valve two-layer up and down, is airtight construction, is that its axle center of helical pressure adjusting spring (2) is vertical with air film (4) directly over the air film (4), the upper end of pressure adjusting spring (2) is adjusting pressuring knob (3), and housing connects for spiral shell links between (15), but manual tune, when high-pressure gas from suction port (6) when entering, with the A end jack-up of pressure regulation bar (5), its B end is then downward; But after the pressure of housing lower floor increases, air film (4) is pressurizeed, it is upwards agitated, and the B end that drives pressure regulation bar (5) makes progress, then the A end moves down and blocks suction port (6), air inlet is obstructed, the interior lower floor of housing (15) pressure is descended, air film (4) moves down again under the effect of pressure adjusting spring (2), pressure regulation bar (5) oppositely moves again, suction port (6) balance, make to keep certain pressure in the housing (15), regulate the elastic force that adjusting pressuring knob (3) can change pressure adjusting spring (2), reach the effect of regulating pressure; The structure of described pneumatic lever (10) is: there is a return spring (9) below of its C end, its elastic force is greater than pressure adjusting spring (2), the B end that faces toward pressure regulation bar (5) in the top of pneumatic lever (10) aligns with pressure adjusting spring (2), the other end at pneumatic lever (10) is that D end below connects a pneumatic membrane (11), in pneumatic membrane (11) below is a pneumatic cavity (12), it and pneumatic H (13) are close to, when pneumatic port (13) enters certain pressure gas, pneumatic membrane (11) will upwards be heaved, the D end that promotes pneumatic lever (10) moves up, then the C end moves down, and at this moment the pressure governor proper functioning is emitted gas; After the pressure of pneumatic port (13) was removed, the return spring (9) under the C of pneumatic lever (10) the end upwards B of jack-up promotion pressure regulation bar (5) was held upwards, and its A end is closed suction port (6) downwards.

3, inflammable gas autocontrol valve according to claim 1, it is characterized in that: described pneumatic unit (U) is by motor (33), air compression tube (31) and reduction gear (34) are formed, motor (33) drives take-up spool (35) after slowing down, on axle, connect a belt (36), the other end of belt (36) links to each other with the center, top of air compression tube (31), air compression tube (31) top closure, open the lower end, be fixed on the base (37), motor (33) reduction gear (34) is all in air compression tube (31), an air outlet (32) is arranged on base, and (32) last tracheae that connects links to each other with pneumatic valve (W) in the air outlet.

4, inflammable gas autocontrol valve according to claim 3 is characterized in that: the barrel of described air compression tube (31) is circular folding structure, and certain elastic force is arranged, when no external force, the top of air compression tube (31) withstands on the upper end of support (38), after the compression, can restore.

5, inflammable gas autocontrol valve according to claim 3 is characterized in that: control the switch and the sense of rotation of motor (33) with position limit switch, so that air compression tube (31) correctly compresses and restores.

6, inflammable gas autocontrol valve according to claim 1 is characterized in that: the function of described air-sensitive control unit (S) is: when gas leakage, send alarm signal, Drive and Control Circuit removes to cut off source of the gas by pneumatic unit (U) simultaneously.

7, inflammable gas autocontrol valve according to claim 1, it is characterized in that: described timer (T) and pneumatic unit (U), gas sensor unit (S) are installed together, power supply by its timing turning off pneumatic unit (U), in timer (T) the control end K switch of also connecting, can cut off flammable source of the gas midway at any time what timer was fixed time.