Background technique: at present; valve on most high temperature, many dirt, year pressure flue gas pipeline; switch repeatedly repeatedly after; (or fail to overlap with the center line of valve seat because of valve gap as long as once fail to close tight; or because of between two sealing surfaces, being embedded with solid sundries; or the like); carry and press flue gas will carry grit secretly from flowing out at a high speed between the sealing surface of valve; the grit of high speed outflow can unevenly wash away, the sealing surface of grinding valve; gradually sealing surface is ground radially rill or groove, make the leakage rate of flue gas increasing.So not only miss secondary energy, also polluted environment.For example on most of blast furnaces, the coal gas major part of leakage all leaks at the Blast Furnace Throat Ventilation Valve place.Though endanger greatlyyer, can only stand this present situation for a long time, because one be the Blast Furnace Throat Ventilation Valve of changing new existing type, after gas leakage again soon.The 2nd, also do not have so far a kind of can be gastight lastingly, the high temperature that price is not too expensive again, many dirt, carry the valve that diffuses of pressing flue gas (or coal gas).
Summary of the invention: for overcoming above-mentioned shortcoming, the purpose of this utility model is that the high temperature dusty gas that a kind of liquid alloy of design encircles connecting vessels more diffuses valve.Its technological scheme is: valve seat 9 is positioned on gas up take 4 upper ends, valve seat 9 is provided with the different concentric circle ring flat-plate 16 of three loop diameters, liquid alloy 27 is arranged in the valve seat 9, and the outer shroud of valve seat 9 is steam jet ring casings 11 of being welded into by steam jet ring flat-plate 10 and outer shroud and communicates with steam tube 5; Three concentric circle ring flat-plates 26 that diameter is different are being welded in valve gap 13 bottoms, are welded with steam jet endless tube 12 on the valve gap 3 and communicate with steam tube 5; Platform 1 is provided with oil hydraulic cylinder 2, hydraulic cylinder piston rod 7 connecting groove goosenecks 20, and key seat 22 is embedded between two channel-section steel crossbeams 20 between beam, and thick-wall seamless 15 upper ends connect key seat 22 and valve gap key seat 23 between valve gap top board 17, beam, and its lower end connects valve gap 13.The advantage of this model utility is: this valve gap is covered the back just can not leak gas.Its above-mentioned sealing principle, be by alloy liquid-column height difference in the connecting vessels successively decrease step by step flue gas and the pressure difference of managing between the outer atmosphere in the pipe, be to set about to effect a radical cure the leakage of carrying pressure, many dirt, high-temperature flue gas from effecting a permanent cure, and after this valve gap covers soon, liquid alloy will solidify and all weldering is tight with the flue gas channel in this valve; Maintenance when flue gas pressures of maintenance is lower than this valve of 0.035Mpa, only needs one hour easily usually; When this valve is used in the counterrotating sealing,, also need not change distortion, the surface friction drag when rotten soft sealing material can also reduce rotation both without lubricated maintenance; Can obviously improve this valve user's economic benefit and social benefit.Product is energy-conservation and environment protection effect is remarkable, and the working life of effectively sealing is much larger than present like product.
Embodiment: high temperature, many dirt, year pressure coal gas (or flue gas) are to exist pressure difference inside and outside the sealing surface of seal arrangement from the basic reason of valves leakage defluidization to atmosphere.If this pressure difference of " successively decreasing step by step " in seal arrangement, making the sealing surface and the pressure difference between the atmosphere that contacts with atmosphere is 0, no matter coal gas (or flue gas) high temperature or deny many dirt whether then carries a pressure flue gas and can not miss in the atmosphere.Reach the purpose of radical cure seal arrangement leakage coal gas (or flue gas).Second factor that ensures sealing, be liquid alloy after this seal arrangement is transformed into closed condition soon, liquid alloy will solidify, thereby the whole leakage paths in the connecting vessels are all welded sternly, forms the abundant weld seam of twice closed curve in each grade connecting vessels.And the connected vessels type structure allows bigger (comparing with present various seal valves) deviation of center line generation of the center line track of valve gap when lifting and design, and this valve valve gap also still can cover and form gastight seal arrangement.
This valve base 9 is positioned on the upper end of top gas asending pipe 4, the bottom of this valve base 9 becomes 8 * 45 ° of uniform reinforcement fins 6 to support by 8, the different concentric circle ring flat-plate 16 of three loop diameters is arranged on this valve base 9, on base plate, be welded with temperature measuring tube 29, can in time measure and on the instrument of blast furnace night shift room, demonstrate the temperature of liquid alloy 27 in this valve base 9.Outer shroud at this valve base 9, it is the steam jet ring casing 11 that is welded into by steam jet ring flat-plate 10 and outer shroud, when liquid alloy 27 has solidified and again during this valve of open and close, can open the valve of steam jet ring casing 11 supply steam in advance at tuyere platform, the steam of sending here from steam tube 5 is just from the ring flat-plate surface that is sprayed onto its opposite of the hole high speed of steam jet ring flat-plate 10, carry out the jet flow of greater efficiency and give heat for heat and vapor condensation, the temperature of the solid alloy in this valve base 9 is elevated to more than the fusing point of liquid alloy 27 faster; Three concentric circle ring flat-plates 26 that diameter is different are arranged at the bottom of ring flat-plate in this valve valve gap 13, when this valve gap is tight, form three grades of connecting vessels shapes that link to each other shown in the accompanying drawing 1 with this valve base 9.The Shang Jiaochu of ring flat-plate is welded with steam jet endless tube 12 in this valve gap 13, when tuyere platform is opened to steam jet ring casing 11 supply steam, just simultaneously to steam jet endless tube 12 supply steam, high pressure steam and solid alloy carry out the bigger condensation of heat transfer coefficient and give heat, the temperature of solid alloy is raise faster and be molten into liquid alloy 27.(adopting heat-resistant rubber hose or metallic hoses) is that the distance between the hard steam tube at 19 two ends that are flexible coupling can elongate or shorten thereupon for when 20 liftings of channel-section steel crossbeam to be flexible coupling 19.Because the outside between this valve valve gap 13 and this valve base 9, the stock gas that may the have the short time once in a while phenomenon of catching fire, so water spray endless tube 25 is installed in the outside of the piston rod 7 of position in the drawings, become the angle more than 60 ° with horizontal plane, the surface sprinkling of the piston rod 7 above it, prevent that furnace roof from burning bending deformation to piston rod 7 once catching fire, and makes Hydraulic Power Transmission System can't continue proper functioning.Thick-wall seamless 15 between valve gap intermediate plate 14 and the valve gap top board 17 and the outer reinforcement fin of pipe, it all is the Driving force that is mutually 2 pairs of hydraulic cylinder piston rods 7 of oil hydraulic cylinder of 180 ° of layouts for two, ears connecting pin 18 through piston rod 7 upper ends, two channel-section steel crossbeams 20, beam-ends key seat 21, key seat 22 between beam, valve gap key seat 23 and taper key 24, accurately, pass to this valve valve gap 13 reliably, so also be convenient to when blast furnace staying, taper key 24 is got key seat 22 and valve gap key seat 23 between beam, channel-section steel crossbeam 20 is raise, this valve valve gap 13 can be hung down integral replacing, so that the wearing and tearing breach accurately on the soldering valve gap 13 3 circle ring flat-plates.For the center line lifting by design that this valve valve gap 13 can be similar to, one is that two oil hydraulic cylinders 2 adopt servocontrol formula synchronizing circuit, guarantees two oil hydraulic cylinders, 2 energy synchronization liftings, prevents channel-section steel crossbeam 20 and tilts or stuck phenomenons.The 2nd, be welded with in the outside of stock gas asending pipe 4 and become 90 ° horizontal channel-section steel 8 (can form a center line positioning hole by two static pulley) between 4 adjacent two in its outer end, near the center line positioning hole, fix 4 horizontal channel-section steels 8 by 4 angle steel welding, two center line positioning pipes that link to each other with oil hydraulic cylinder 2 not, to reach by two pairs of static pulley below the center line positioning hole on the horizontal channel-section steel 8 of this valve and the mountion plate 1 this valve mountion plate 1 below, the centerline deviation≤4mm when guaranteeing 13 liftings of this valve valve gap.The bar section outside that directly contacts at hydraulic cylinder piston rod 7 and oil hydraulic cylinder 2 is with the dirt-proof boot 3 that can stretch.This valve is not when only blast furnace is not out-of-blast opening this valve valve gap 13 (for example blast furnace leak informaton will open this valve valve gap 1 to 5 minute when sitting material); just can make the upper end of each layer ring flat-plate in this valve base 9 and the lower end of this valve valve gap 13 each layer ring flat-plate that temporary transient wearing and tearing take place; (this moment, the gas flow of blast furnace furnace roof reduced more than 60% than normal flow rate; impacting the gas speed that respectively encloses ring flat-plate reduces greatly; and square being directly proportional of the impact kinetic energy of grit and grit flow velocity); for what prevent that this regular meeting takes place this valve base 9 is respectively enclosed the wearing and tearing on ring flat-plate top and the wearing and tearing of this valve valve gap 13 respectively being enclosed the ring flat-plate bottom; in the top of each circle valve seat ring flat-plate and the bottom of valve gap ring flat-plate; be with and handle the abrasionproof sheath 28 make by the sheet metal punching press and through surface hardening; the local worn out abrasionproof sheath 28 of integral replacing rapidly when blast furnace plan damping down; when wearing and tearing too much in the ring flat-plate bottom of respectively enclosing of this valve valve gap 13; need soldering everywhere during breach; this valve valve gap 13 integral body can be hung down; change good this valve valve gap 13 of soldering; not during damping down, under cooperating, finishes special-purpose loose tool soldering at blast furnace accurately then to this valve valve gap 13.
