A kind of low pressure drop floating type gas phase media water-sealed valve
The present invention relates to a kind of water-sealing valve, specifically relate to oil refining, the chemical industry gas phase media blocks a kind of low pressure drop floating type gas phase media water-sealed valve of usefulness.
At present, at oil refining, chemical industry low-pressure vapor phase medium large flow, big runner (pipe diameter＞when 2m) carrying, take following pipeline to cut off technological method usually: 1, large-scale stop valve.But large-scale stop valve exists and manufactures and designs problems such as difficulty, high temperature deformation bite be not easy to operate, and the domestic Related product that do not occur as yet needs import, but costs an arm and a leg.2, large-scale adjusting butterfly valve.The major diameter butterfly valve exist cost an arm and a leg, problem such as poorly sealed, the yielding leakage of being heated, use under the situation about handling so only cut off in the occasion that allows the gas phase media small leakage or as emergency episode; If to the tighter occasion of seal request, all need be aided with the cut-out measure of other good seal.3, water sealed tank.Water sealed tank is cut-out means commonly used at present, has easy manufacturing, cost is low, good seal, advantage such as do not leak, but because water sealed tank must be with 90 ° of intercross arrangement of large diameter low-pressure vapor phase pipeline, and make gas phase media when normally carrying by it, carried out the enlarging deceleration, dilatation, 180 ° turn to, processes such as reducing acceleration, the pressure loss big (calculating and the about pressure drop increase of measured result 0.5-0.8kPa) when causing gas phase media normally by water sealed tank, thereby directly have influence on the transmitting power input or the energy recovery output of gas phase media, increased energy consumption.Develop a kind of novel seal valve for this reason and have realistic meaning.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention discloses a kind of low pressure drop floating type gas phase media water-sealed valve, this equipment has advantages such as pressure drop is little, simple and compact for structure, cost is low, sealing is tight, can effectively solve big, the technical barriers such as price is high, complex structure of pressure drop in the existing gas phase pipeline cut-out equipment.
For achieving the above object, the present invention adopts following technological scheme:
A kind of low pressure drop floating type gas phase media water-sealed valve, this low pressure drop floating type gas phase media water-sealed valve utilizes fluid mechanics principle, initiative employing be the water seal self-regulation balancing technique of floating, be different from traditional water-seal principle fully, this technological break-through the structure of traditional water-sealed equipment, reduced the hydrodynamic pressure loss of energy to greatest extent, made more compact structure.It comprises gas inlet tube, gas outlet tube, outer flow-off, valve body, intake-outlet, in described valve body, be provided with the floating plug that can fluctuate, be provided with sealed cistern on floating plug top, between valve body and floating plug, be provided with the guide rail that the guiding floating plug accurately moves up and down; The water seal water inlet is installed in the upper end of described valve body, water seal water can carry out the water yield to sealed cistern and replenish, the lower end is equipped with drain opening, can accurately control fluctuating of floating plug, makes sealed cistern carry out effective switch to heavy caliber low-pressure gas phase media pipeline and cuts off sealing.
Described floating plug upper end is provided with interior flow-off, and the wall of floating plug is provided with air hole.The bottom is provided with the support parallels in the described valve body.
The present invention has following advantage owing to adopted technological scheme as mentioned above:
1, pressure drop is low, and promptly the pressure loss of energy is low.Low pressure drop floating type gas phase media water-sealed valve of the present invention, owing to adopted and broken through traditional water sealed cans structure and principle, when so low pressure drop floating type gas phase media water-sealed valve is opened, the gas phase pipeline is equivalent to lead directly to substantially, droop loss little (＜0.2kPa), be equivalent to 1/4 pressure drop of former water sealed tank structure.
2, good energy-conserving effect, good in economic efficiency.With 1,000,000 tons of/year catalytic cracking unit gas energy recovery channels is example, change the low pressure loss gas phase media water-sealed valve after, the flue gas pressures loss of energy reduces, can improve year economic benefit that the flue gas turbine expander generated energy brings be about 100 surplus ten thousand yuan.
3, simple and compact for structure, the more former water sealed tank of volume is little by 40%.Greatly reduce expenses such as installation, transportation, basic civil engineering.
4, main material amount minimizing, the weight reduction of manufacturing usefulness are more, and cost is low.
5, sealing is tight.Tighter, more reliable than other seal valve, butterfly valve seal.Can adapt to gas phase media of different nature, as poisonous, the inflammable medium that waits.
Description of drawings
Fig. 1 is a kind of structural representation of low pressure drop floating type gas phase media water-sealed valve.
In Fig. 1, gas inlet tube-1, gas outlet tube-2, water seal water inlet-3, interior flow-off-4, outer flow-off-5, floating plug-6, valve body-7, intake-outlet-8, support parallels-9, guide rail-10, air hole-11, sealed cistern-12
Fig. 2 is that a kind of low pressure drop floating type gas phase media water-sealed valve is implemented schematic representation.
In Fig. 2, gas inlet tube-1, gas outlet tube-2, water seal water inlet-3, interior flow-off-4, outer flow-off-5, floating plug-6, valve body-7, intake-outlet-8, support parallels-9, guide rail-10, air hole-11, sealed cistern-12
Below in conjunction with accompanying drawing the present invention is further described:
A kind of low pressure drop floating type gas phase media water-sealed valve, it comprises gas inlet tube 1, gas outlet tube 2, outer flow-off 5, valve body 7, intake-outlet 8, in described valve body 7, be provided with the floating plug 6 that can fluctuate, described floating plug 6 tops are provided with sealed cistern 12 and interior flow-off 4, and the wall of floating plug 6 is provided with air hole 11.The bottom is provided with and supports parallels 9 in the described valve body 7.Between valve body 7 and floating plug 6, be provided with the guide rail 10 that guiding floating plug 6 accurately moves up and down; Water seal water inlet 3 is installed in the upper end of described valve body 7.
During use, when cutting off gas phase media if desired, intake-outlet 8 begins water inlet, water level is when setting liquid level, outer flow-off 5 water outlets, floating plug 6 rises along guide rail 10, and sealed cistern 12 is to gas outlet tube 2 lower end positions, 3 sealed cistern 12 water fillings of water seal water inlet to floating plug, sealed cistern and gas outlet tube UNICOM, liquid level rises under the effect of gas inlet tube 1 pressure in the gas outlet tube 2, rises to the balance liquid level, reach sealing effect, see Fig. 2.
When opening the gas phase media passage as need, water seal water inlet 3 is closed, intake-outlet 8 is opened, water effluxes in the valve body 7, and floating plug 6 descends along guide rail 10, falls on the support parallels 9 of valve bottom, this moment gas inlet tube 1 and gas outlet tube 2 direct UNICOMs, Fig. 1 is seen in whole pipeline unlatching.