CN102128290A

CN102128290A - Water pressure controlled type gas safety valve

Info

Publication number: CN102128290A
Application number: CN2011100486444A
Authority: CN
Inventors: 林峰; 戴丽; 林强
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-01
Filing date: 2011-03-01
Publication date: 2011-07-20

Abstract

The invention provides a novel gas on/off valve with a reasonable structure, safety and reliability. In places with various toxic gases and flammable gases, water is the most safe control power of the gas on/off valve without doubt. In the invention, a gas valve is controlled by the pressure difference of water pressure and gas pressure, and a piston controlled by the water pressure is arranged in the valve. When a water valve is opened, the piston can block a gas inlet under the control of the water pressure as the water pressure is greatly higher than the gas pressure, and the gas valve is closed. However, when the water valve is closed, the gas pressure is higher than the water pressure as no water pressure exists, the gas valve is opened, and gas can enter the valve from the inlet and go out from an outlet. Compared with the prior art, the water pressure controlled type gas safety valve has the advantages that with the water pressure serving as the control power of the gas valve, other uncertain dangerous factors are avoided, and the safety and the reliability are ensured. The invention further adopts the technical measures that the control water valves can be arranged in multiple safe positions, multi-point control can be realized, controlled points can be close to sites as well as be far from the sites, and site automatic control and remote electronic control can be realized when automatic detection equipment and an electromagnet valve are connected.

Description

Hydraulic pressure controlling type gas safety valve

Technical field

The present invention relates to a kind of novel usefulness hydraulic pressure as the gas switch valving of controlling power.

Background technique

The gas switch valve that is applied to each place at present all adopts manual control mode, and the many times involved gas of people all is toxic gas, inflammable gas, at the time of emergency, on-the-spot dangerous high, in order to prevent dangerous aggravation and expansion, people often must emit life risk to enter on-the-spot throttle down, do like this is dangerously to take a long time again, can not in time dispose danger, make the little incident delay that to control originally to forming catastrophe, at present, because progress of science and technology, the all gases sensor also appears on the market in succession, various gas detectors, alarm also arises at the historic moment, but because the particularity of these gases, the valve that enables to control automatically and safely these gases does not come into operation, and only can make the accident that takes place and detect and report to the police, and can't be closed disposal automatically, and because Environmental Conditions requires switch valve to install nearby, can not realize telecontrol, for this reason, the present invention adopts the valve closing of the mode control gaseous of hydraulic pressure control, can realize on-the-spot and remote manual control, on-the-spot control automatically, the safety control of multiple mode such as long-range electronic control reaches timely, the purpose of safe disposal.

Summary of the invention

For achieving the above object, the present invention is achieved by the following technical programs: the pressure difference control gaseous valve that at first utilizes water pressure and gas pressure, piston by hydraulic pressure control is set in valve, when water valve is opened, because hydraulic pressure is much larger than gas pressure, under the control of hydraulic pressure, piston can barrier gas population, gas valve is closed, and when water valve is closed, not having the pressure effect of water, gas pressure makes gas valve open greater than air pressure, gas can enter from the population of valve, is sent by the outlet of valve.

The present invention compared with prior art, technical advantage of the present invention is: make the control power of air valve with hydraulic pressure, avoided other uncertain unsafe factors, guaranteed safe and reliable.

The further technical measures of the present invention are: the control water valve can be installed in a plurality of safe positions, the control of realization multiple spot, can be near the scene, also can be away from the scene, and can also realize that when connecting automatic checkout equipment and electromagnetism water valve on-the-spot control automatically and electronic remote control.

Description of drawings

Fig. 1 is the schematic representation of hydraulic pressure controlling type gas safety valve

System schematic when Fig. 2 is multiple spot of the present invention control

System schematic when Fig. 3 is multiple spot control of the present invention and increase liquid pressure charging valve

Among the figure: 1, the shell of hydraulic pressure controlling type gas safety valve, 2, piston, 3, spring, 4, the plug that sluices, 5, water valve, 6, gas population, 7, gas outlet, 8, cavity, 9, hydraulic pressure controlling type gas safety valve, 10, the on-site manual water valve, 11, on-the-spot automatic safe water valve, 12, field control chamber manual water valve, 13, field control chamber electromagnetism water valve, 14, the Central Control Room manual water valve, 15, Central Control Room electromagnetism water valve, 16, fire water pipe network, 17, gas population valve, 18, the liquid pressure charging valve.

Embodiment

Hydraulic pressure controlling type gas safety valve involved in the present invention is to utilize the pressure difference of the pressure of the pressure of water and gas to realize controlling, in the present information of understanding, know, a barometric pressure is 100KPa, the interface pressure of tap water in the sub-district is 300KPa-500KPa, the pressure of high pressure fire fighting water is 1100KPa, the pressure of low pressure fire water is 550KPa, the accessible pressure of liquid is 2000 barometric pressure behind the employing liquid pressure charging valve, be 200MPa, and the pressure of civil natural gas is than the high 2KPa-2.3KPa of general air (promptly than a high 2KPa-2.3KPa of barometric pressure), be 102KPa-103KPa, the boiler gas pressure is than the high 8KPa-10KPa of general air (promptly than a high 8KPa-10KPa of barometric pressure), be 108KPa-110KPa, the town gas pressure tank is that 400KPa is (for safety, require the house coal gas tank must use reduction valve), the air pressure of natural gas filling station is 2.5MPa, so the pressure control air valve of water is feasible, under the situation of family expenses, can directly adopt tap water to do control source (hydraulic pressure deficiency except) especially.

Among Fig. 1, piston 2 adopts rubber materials, and under normal circumstances because of the bottom is an air, top is subjected to gas pressure and self gravitation effect and is in lower position, and valve cavity body 8 is closed, gas can only flow to outlet 7 from population 6 along the direction of P1 among Fig. 1, when having an accident, and the threshold switch 5 of fetching boiling water, water flows into along the direction of P2, its pressure moves up piston greater than gas pressure, stops up gas population 6, gas is blocked, reach and cut off the purpose that gas flows out, this moment same because valve cavity body 8 by piston closes, water can not flow to gas pipeline too, after accident is removed, close water valve 5 switches, influence the proper flow of gas owing to there is residual water to exist in the cavity 8 this moment, sluicing plug 4 need be pinned and discharge water, sluice plug 4 when water valve 5 is opened, owing to be subjected to the effect of hydraulic pressure and spring, water can not flow out from discharge opening.

Because piston 2 adopts rubber materials, thereby it moves up and down Shi Buhui because of the friction-produced spark in valve, has guaranteed the Security of using.

System schematic when Fig. 2 is multiple spot control, wherein hydraulic pressure controlling type gas safety valve 9 is promptly shown in Figure 1, on-site manual water valve 10 uses on-the-spot manual control water valve for being installed in, on-the-spot automatic safe water valve 11 is that air inclusion detects, the general name of device such as automatic control circuit and solenoid valve, it is the aerial content of detected gas automatically, accomplish automatic detection, automatically report to the police and close hydraulic pressure controlling type gas safety valve 9 automatically, reach the effect of closing gas valve automatically, field control chamber manual water valve 12 is for being installed in the manual control water valve of field control chamber, field control chamber electromagnetism water valve 13 is mounted in the solenoid valve of field control chamber, Central Control Room manual water valve 14 is for being installed in the manual control water valve of Central Control Room, Central Control Room electromagnetism water valve 15 is mounted in the solenoid valve of Central Control Room, the said equipment all is installed in parallel between the water inlet of fire water pipe network 16 and hydraulic pressure controlling type gas safety valve 9, as long as wherein arbitrary equipment is effectively worked, the air flue of hydraulic pressure controlling type gas safety valve 9 will be cut off, stop the outflow of gas, the purpose that manual control water valve is set is to guarantee effective operation that system still can be safe and reliable when having a power failure, gas population valve 17 is installed in hydraulic pressure controlling type gas safety valve 9 gas population fronts, as the valving of control gaseous switch under the normal condition.

Propose especially, because control power adopts hydraulic pressure, and piston 2 employing rubber materials can be because of the friction-produced spark, thereby can adopt automatic detection, automatically the method for reporting to the police and controlling automatically can realize closing gas valve automatically at the initial stage that gas has just leaked, and prevented the generation of accident.

In Fig. 3, be the special requirement (as places such as natural gas filling stations) that adapts to some place, can under the prerequisite of the distance that guarantees safety, liquid pressure charging valve 18 be installed before the water inlet of hydraulic pressure controlling type gas safety valve 9, increase the pressure of water, enlarge accommodation of the present invention.

According to technique scheme; those skilled in the art according to actual needs; also can design the valving of the water pressure-controlled of more different structure forms; the foregoing description is only enumerated for explanation the present invention; be not to be used to limit the present invention; the structure of any effects equivalent based on the conversion of the technical program institute all belongs to protection scope of the present invention.

Claims

1. the pressure of a water is as the novel gas switch valving of control power.

2. hydraulic pressure controlling type gas switch valving according to claim 1 can telecontrol and controlled by the safety system at many control points.

3. hydraulic pressure controlling type gas switch valving according to claim 1 can adopt automatic detection and automatic control mode to realize closing automatically gas check valve when gas takes place to leak.