The fire control between gas cutting and acetylene converge platoon is safe

One, overview gas welding or gas cutting are a kind of commonly used metallic treatment craft. It applies extensively at the industry such as mechanical, chemical industry, electric power, shipbuilding. Gas welding uses at all sorts of position welding line solder, the steel that be like carbon, low-alloy steel, cast-iron, nonferrous metal, still use at double-faced to thin plate and bosseyed solder the whole place that shaping small diameter runs solders. Gas cutting is used at cut pure iron, mild steel, profiled bar, plank to wait. The heat source of gas welding or gas cutting is acetylene and oxygen. Acetylene is combustible, explode easily gas, use air feed of the conduit between acetylene converge platoon, concentration so air feed, it is easy travel is mixed effective. 2, gas welding or gas cutting gas welding are to use the blaze after acetylene and oxygen mix a stage to solder as a kind when heat method. Gas welding blaze heats weldment juncture place to fuse condition forms bath, make juncture is in frit to be an organic whole to metal of the fill inside bath next. Because blaze is the pressure to bath, right,weldment heats blaze adjustment is convenient, so bath temperature, appearance, dimension and welding line the reverse side shape wait for easier control. Gas cutting also is to use acetylene and oxygen to mix blaze to will be heated by the metal of cut to ignition point, burn the metal to generate metallic oxide with cut oxygen next- - slaggy, blow its by cut oxygen again. Line of the purity because of this cut oxygen, pressure, velocity of flow, wind (speed of very little cut, quality and aerobic wastage have air current opening bigger impact. When cut, the more than heat of cut area and warm-up blaze heat layer of lower level metal again ignition point, such continueing go down, can dissection the metal stage by stage. The essence of aerobic cut is the metal burns in pure oxygen, it is a warm-up, combustion, go the successive process of broken bits. 3, between platoon of converge of the acetylene between acetylene converge platoon by acetylene steel bottle, converge platoon, central temper is prevented implement, dry type temper prevents implement comprise and mix with bottle of aerobic lay aside, pressure regulator cut quadrature or quench quadrature cooperate to use. Use acetylene next, go by steel bottle after acetylene station fills fill, again between platoon of carry back converge. Between acetylene converge platoon, use bottle of 2 groups of steel, every groups 5 paralell connection are arranged. Exit of every steel bottle is controlled by shut-off valve. When steel bottle air feed, platoon of acetylene classics shut-off valve, check valve, converge (the discharge on visible watch and pressure reading) , conduit of the check valve that is in charge of L via ground connection, shut-off valve, underground prevents to central temper implement, be defeated by past job workshop via acetylene underground conduit again. L, industrial oxygen oxygen is colorless, gas of insipidity, scentless, itself cannot burn, but it is one kind support combustion livelily gas. Bottle of aerobic lay aside is highest pressure is 40 litres for 150 atmosphere, cubage, in aerobic bottle exit, of pressure regulator, so that reduce high-pressured oxygen to needs actuating pressure, arrange place of business of 4 one 3 air, make pressure keeps stable. Of gas welding and gas cutting industrial gas is divided normally for third class.

2, industrial acetylene acetylene also weighs acetylene, lighter than oxygen, below the atmospheric pressure when normal temperature, acetylene is achromatic, the gas that acetylene is a kind of dangerous extremely easy explosion, exceed 200 when temperature 300 degrees one when, acetylene can produce radiative aggregate effect, and emit quantity of heat farther polymerization, if cannot eliminate quickness of quantity of heat in the process here, of aggregate action increase and accelerate, can make the temperature of acetylene elevatory, bring about acetylene thereby decompose explosion. Pure acetylene gas, when its pressure is 1.

5 gauge pressure, when temperature achieves 580 ℃ , do not need exterior ignite, also can happen by oneself when decomposing explosive acetylene and oxygen or air to be gas mixture, sex of its explosion danger is bigger. Industrial acetylene, its contain more impurity, wait like vulcanization hydrogen, phosphine, reason has intense excitant stink. Acetylene is in acetone solubility is the biggest, bottled acetylene uses his to dissolve namely the character in acetone comes the building between platoon of the converge between platoon of keep in storage and carried 〕 3, converge must accord with fire control to ask: The building should take monolayer park inside independent field, forbidden build in low the ground Bo Huo that note is easy the place that is flooded by water, also cannot stand by personnel concentrated area or traffic thoroughfare place, its field should have good nature ventilated, the its door, window open outside all be being answered. Use shell of simple and easy, built on stilts, small qualitative house, this house Gai Yingping is rectified and do not have blind angle. When converge must border between the platoon when the workshop, border the wall should be 2 class firewall, answer to wait without aperture, hole, door, window and cop on its wall cross. Between converge platoon, acetylene uses should accord with fire control requirement: The actuating pressure of use acetylene is middling pressure 1.

Square of 5 kilograms of ／ centimeter, the largest velocity of flow is second of 8 meters of ／ , stipulate its are defeated by tolerance to should not exceed L0 stere ／ hour, quantity of lay aside of acetylene solid bottle should not exceed the manufacturing dosage of one day and night; The cubage transporting gas of acetylene bottle and speed should not exceed 1.

5 one 2.

／ of 0 stere ／ hour bottle. 4, central temper prevents implement central temper prevents implement call collect Chinese style, prevent by temper of type of many middling pressure implement paralell connection is combined and become. It must inside the monolayer house that buy puts in independence or the field of segregation an ancient type of spoon, and with acetylene converge there is corresponding span between the platoon, when joining with conduit of the acetylene that bury the ground, the conduit that bury the ground is derivative the ground, after putting through, criterion conduit again person underground, the ground channel deepness of conduit, general channel deeply 200 one 300 millimeter, channel is wide for 200 millimeter, make the same score ground channel lid with cover board next. Conduit enters workshop via ground channel. Conduit is then derivative the ground, along the workshop fore-and-aft axes or wall (leave span slightly) flat cloth is in charge of built on stilts, height is made an appointment with 1.

3 meters. Of the travel that wants the car inside convenience workshop and stock carry. Middling pressure shuts type temper to prevent implement, say safe water is sealed again, it is effective safe device. It is used at in take acetylene baggage to shed a generator of acetylene of occasional middling pressure. When regular job, acetylene enters the underwater inside person bucket from T of air inlet duct, push check valve 2, acetylene underwater transgression, gather in department of surface empty L, then from vent one's anger be in charge of 8 output, via acetylene the canal enters dry type temper to prevent implement with cutting torch, solder quadrature or quench quadrature, when producing temper, conduit blaze is converse flow, vent his anger into the person the canal flows into a bucket 8 times inside, heighten of force of friend barrel internal pressure, hydraulic top to check valve 2 when its are shut, reason takes a powerful person 2 when its are shut, reason air inlet duct 7 be sealed to stop. Meanwhile, combustion gas pressure plays coping reed 3 rise, criterion deflate is valvular 4 open, combustion gas from deflate 5 rush, in discharging past air. Because this arrests acetylene blaze flash back effectively,discharge L to be able to go to acetylene converge. But be in,cold weather should go. But be in,cold weather should consider safe prevent frostbite issue. Temper of dry mood of film of explosion proof of 6, middling pressure prevents implement 1000 type temper prevents film of middling pressure explosion proof implement, call post type, its volume is minor, weight is light, the structure is simple, can be in the acetylene conduit of the workshop installs shut-off valve on each port, temper of reload L dry type prevents implement with the join that cut quadrature. When cutting quadrature or solder quadrature to produce Lijl internal heat, the blaze inside the canal is converse flow prevents into person temper implement piece tracheal 9, the explosive room 8 with farewell inpour narrow cubage, urgent leap of indoor pressure is tall, pressure is in film of instantaneous general explosion proof 7 break through, blaze from explosion proof film broken L:1In developing past air. Meanwhile, as a result of body of a powerful person heighten of force of 8 antrum internal pressure, go against stop a powerful person rises 3 times, stop 1 of mouth of air inlet duct, achieved stop air feed and prevent temper. 4, the use between converge platoon is in before second is assembled with conduit between converge platoon definitely, must undertake dividing rust thoroughly, burr, rusty spot, scale and other are not had inside the canal sundry; The wall outside the canal besmears first red lead, hind lacquer of besmear yellow alcoholic acid. After conduit joins, want to have the hydraulic test of 8 one 10 atmosphere, check its welding line and the quality that joint is in, the air-tightness that has 10 one 8 atmosphere then experiments, check its to have do not have flat happening. Mix between converge platoon next the installation on acetylene conduit guides except electrostatic ground connection device. Before conduit is being used, want to use the air inside conduit of nitrogen drive acetylene, prevent conduit termination to collect air even, alveolus exhaust can leave in conduit termination, when conduit fill full nitrogen, block up with silk stop alveolus, gas of acetylene of the input below the requirement that fills nitrogen in conduit next is offerred use. 5, the last word is on industrial production, connect regular meeting to encounter the situation of use acetylene, the fire that be like solder, cutting torch, quench quadrature. The gas that because acetylene is combustible,explodes easily, when the operation, should mix carefully careful. Discharge an air feed with acetylene converge, what can maintain acetylene pressure and velocity of flow not only is stable, improved air feed quality, it still eliminates calcium carbide broken bits to be in of plant area pile up and the pollution that peculiar smell causes, improved circumjacent environment consequently, the goal that achieved processing to pollute a source ' , leave out to calcium carbide carry, the job such as keep in storage. Because this uses the air feed between acetylene converge platoon, can achieve the goal that reasonable, concentration exploits protective environment, advantageous production, economy. This shows, economic benefits is apparent. Reasonable, on the safe side, facilitating concentration manages the craft between acetylene converge platoon to be in charge of with person specially assigned for a task, facilitate the be lost of the leak that prevents acetylene gas or bottle of acetylene lay aside, this pair prevents fire or explosive accident, get twice the result with half the effort of it may be said! CNC Milling