CN202992365U

CN202992365U - Liquefied gas pressure indicating discharge safety valve

Info

Publication number: CN202992365U
Application number: CN 201320009056
Authority: CN
Inventors: 胡达广
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-08
Filing date: 2013-01-08
Publication date: 2013-06-12
Anticipated expiration: 2023-01-08

Abstract

The utility model discloses a liquefied gas pressure indicating discharge safety valve, belonging to the technical field of firefighting safety. In order to eliminate the potential safety hazard of leakage of a pressure reducing valve, the scheme takes the following measures: a U-shaped pipe is filled with liquid; one side of the U-shaped pipe is connected with a low-pressure side of the pressure reducing valve; a pressure anomaly detection device is arranged on the other side of the U-shaped pipe, and the other side is connected with a discharge pipe; and the other end of the discharge pipe is led outdoors. Since the liquefied gas pressure indicating discharge safety valve is arranged in a low-pressure pipeline, the liquefied gas pressure indicating discharge safety valve can be arranged in a position which is conspicuous and convenient for observation, so that a user can observe the pressure change in the low-pressure pipeline and the operation conditions of a pressure reducer anytime. Once the pressure reducer leaks, the liquefied gas pressure indicating discharge safety valve sends an alarm signal, and the leaked excess gas passes through the liquid in the U-shaped pipe and is discharged outdoors through the discharge pipe so as to maintain a safe pressure level in the low-pressure pipe.

Description

Gas pressure indication discharging safety valve

Technical field

The invention belongs to a technical field of security against fire.

Background technique

The present invention comes from the experience of claimant's a subsidiary risk.Cooked in the application kitchen that enters as usual in one day, is ready to sparking blow-on cookings after all.Just pressed ignitor switch, suddenly heard a strong whiff, and then a Great Fire Ball rises from liquefied gas furnace, and the liquefied gas furnace surrounding is fire everywhere.The claimant recognizes at once, must be that reduction valve has gone wrong.And then be flushed in a hurry downstairs, the angle valve on cylinder for liquefied gas is closed, so just avoided the more generation of major break down.Leakage has appearred in that reduction valve really that afterwards confirms, makes the pressure rise of low voltage side on high-tension side pressure, i.e. pressure in steel cylinder.At this moment the pressure due to low voltage side is very high, has just occured above-mentioned one act when the claimant strikes sparks.Fortunately be this moment the gas in cylinder for liquefied gas nearly be finished, air pressure only has normal 1/3rd left and right, if total head, how the claimant dare not imagine its consequence.

Above-mentioned thing is that the claimant is worrying for many years always, and is thinking deeply the thing how to tackle always.Valve leak is also one troublingly can't avoid occurrence again fully.Perhaps, this is often to see in the media because of the set off an explosion reason of a class news of gas leak.No matter be any valve, always it has one day of inefficacy.The most fearful is not know that it when can occur to leak and occur to leak that day, in case can not in time process or deal with improperly, be easy to occur catastrophic event.Be trouble and the danger that reduces to carry, cylinder for liquefied gas is placed on downstairs and passes through low pressure line now, and a cylinder for liquefied gas is very general for a plurality of users' situation.For easy to use, the angle valve on these cylinder for liquefied gas is almost never to close, and is all 24 hours air feed.In these users, barometer is not installed in low pressure line, more do not have the phenomenon of mounting safety valve very general.This has brought difficulty in time pinpointing the problems and remove the dangerous condition.It is very greatly different that the pressure of reduction valve both sides differs, and the high pressure side is to be about 1.5MPa in cylinder for liquefied gas, and low voltage side only has 2.8KPa.Indoor supply air line is built by low pressure request, and it can not bear on high-tension side pressure.In one day, the most of the time does not have the user to use gas, in case at this moment leaking appears in reduction valve, the pressure in air supply pipe can rise at leisure.And the air pressure that only rises in theory reduction valve both sides equates, just can stop when namely low voltage side also reaches 1.5MPa.How fearful this be thing.When the pressure rise in air supply pipe arrives certain degree, the most incidental is that air supply pipe comes off or each interface and stove and accessory gas leakage, and in a single day this situation occurs, and runs out with regard to having a large amount of liquid gas, make being full of a large amount of mixed gass in the room, meeting spark will set off an explosion.

Summary of the invention

Leak this potential safety hazard in order to tackle reduction valve, the present invention has taked following measure: at the in-built feed liquor body of U-shaped pipe, one side of U-shaped pipe connects the low voltage side (being in the low pressure supply air line) of reduction valve, another side is equipped with pressure abnormality detecting device and connects discharge pipe, and the other end of discharge pipe is drawn outdoor.

Because this device is to be contained in low pressure line, so it can be contained in the position that kitchen, bathroom etc. are comparatively obvious, be convenient to observe.The benefit of doing like this is that the user can observe the variation of low pressure line internal pressure and the function situation of decompressor at any time, in case decompressor leaks, this device can send alarm signal trigger alarm device.The unnecessary gas that leaks can pass liquid in the U-shaped pipe and go out outdoorly through discharged, makes and keeps safe stress level in low-voltage tube, so just can avoid the generation of contingency.

Description of drawings

Fig. 1. gas pressure indication discharging safety valve, Hall magnetic inductor warning device structural representation is installed.

Fig. 2. gas pressure indication discharging safety valve, installing electrodes warning device structural representation.

.1 cylinder for liquefied gas, 2 reduction valve, 3U shape pipe, 4 magnetic sheet buoyancy aids, 5 electrodes, 6 liquid, 7 Hall magnetic inductors, 8 discharge pipes in figure.

Embodiment

At the in-built feed liquor body 6 of U-shaped pipe 3, one side of U-shaped pipe 3 connects the low voltage side (being in the low pressure supply air line) of reduction valve 2, and another side setting pressure abnormal detecting device also connects discharge pipe 8, and the other end of discharge pipe 8 is drawn outdoor.The height difference of the interior both sides of U-shaped pipe 3 liquid level can reflect pressure variation or the pressure difference of U-shaped pipe 3 both sides strictly according to the facts, its termination is entered (being the low voltage side of reduction valve) in indoor low pressure supply air line, and the user just can monitor by it the pressure changing of reduction valve low voltage side at any time.Leak in case reduction valve 2 occurs, the pressure of reduction valve low voltage side can rise at leisure.U-shaped pipe 3 connects also and then synchronous rising of liquid level of an avris of discharge pipe 8, and when liquid level rose to the position at liquid level detection device place, this device will send a pulse alarm signal, and this signal can be used for the trigger alarm device and gives the alarm.Rise when the pressure continuation of reduction valve low voltage side, the liquid in the U-shaped pipe is pushed to an avris of U-shaped pipe at leisure fully by air pressure.At this moment the pressure that produces greater than liquid deadweight of the pressure of U-shaped intraluminal fluid gas, liquid gas will pass liquid and outlet pipe 8 is discharged outdoor with the form of bubble.During more than or equal to leakage rate, the pressure of reduction valve low voltage side will maintain the level of a safety when discharge amount.Bubble in the U-shaped pipe can cause user's attention and take corresponding measure, leaks thereby eliminated reduction valve the potential safety hazard that causes.Structural stability of the present invention is simple, reliable and practical.

For the pressure that can further in time monitor the reduction valve low voltage side changes, one side this programme is at the pressure abnormality detecting device that is equipped with of U-shaped pipe 3.The form of pressure abnormality detecting device can be diversified, for example can put into magnetic sheet buoyancy aid (4) in an avris of U-shaped pipe 3, and this magnetic sheet buoyancy aid is to load onto magnetic sheet on a buoyancy aid, makes this buoyancy aid carrying magnetic.Buoyancy aid and magnetic sheet can be with liquid surface liftings.This suitable position, avris outside at U-shaped pipe 3 is equipped with Hall magnetic inductor 7, be with the magnetic sheet buoyancy aid also to rise when liquid level rises, when rising to the position of Hall magnetic inductor 7, the Hall magnetic inductor sends the warning pulse signal, the trigger alarm device is reported to the police, as shown in Figure 1; Again can be in the appropriate location of U-shaped pipe installing electrodes, when liquid level rose to the position at electrode place, liquid 6 was connected electrode 5, thereby sends the warning pulse signal, as shown in Figure 2.Can also put into lighttight buoyancy aid or reflective buoyancy aid in an avris of U-shaped pipe 3 in addition, put into this lighttight buoyancy aid or reflective buoyancy aid, purpose is in order to cover or reflected infrared ray.Lighttight buoyancy aid or reflective buoyancy aid can the liftings with liquid level.The suitable position installation infrared line induction switch in the outside of U-shaped pipe 3 these avris, liquid level drives lighttight buoyancy aid when rising or reflective buoyancy aid rises, when rising to the position at infra-red sensor switch place, infra-red sensor switch sends the warning pulse signal, and the trigger alarm device is reported to the police.

Claims

1. safety valve is discharged in a gas pressure indication, mainly comprise U-shaped pipe, liquid, discharge pipe, pressure abnormality detecting device, it is characterized in that, at the in-built feed liquor body of U-shaped pipe, one side of U-shaped pipe connects the low voltage side of reduction valve, another side is equipped with pressure abnormality detecting device and connects discharge pipe, and the other end of discharge pipe is drawn outdoor.