CN201368243Y - High-speed breather valve for tank ship - Google Patents

Abstract

The utility model relates to a pressure/vacuum valve for a liquid cargo tank, in particular to a breather valve for the liquid cargo tank on a FPSO floating-production oil storage system of an ultra-large tank ship. The high-speed breather valve for the tank ship mainly comprises a pressure valve, a vacuum valve and a fluid director; the pressure valve comprises a flow deflector, an upper valve body and a three-way lower valve body that are connected in series by three stages; the flow deflector is fixedly connected with the upper part of the upper valve body; the vacuum valve is fixedly connected with the side surface port of the three-way lower valve body; a valve rod is arranged in the upper valve body and the flow deflector cavity; the top of the valve rod extends out of the flow deflector and is fixedly connected with the fluid director; the valve rod is internally provided with a magnetic adjusting rod; the flow deflector cavity is internally provided with a permanent magnetic ring which is sheathed on the valve rod and corresponds to the magnetic adjusting rod; the lower part of the valve rod is connected with a heavy block; and the valve rod below the fluid director is fixedly connected with a damping sheet. The breather valve can stably open the valve to discharge oil gas smoothly, can also reduce the impact force of the fluid director when the valve is closed, thus eliminating hammering phenomenon and ensuring the safety of lives and possessions.

Description

High-speed breather valve for oil tanker

Technical field

The utility model relates to a kind of cargo tank pressure, specifically is used for cargo tank and petroleum product, rock gas, the storage tank of liquefied petroleum gas (LPG) and the high-speed ventilation valve of chemical industry equipment on oil, chemical product, liquefied petroleum gas (LPG), liquified natural gas carrier (LNGC) oceangoing ship and the Ultra Large Crude Carrier FPSO Floating Production oil storage system.

Background technique

High-speed ventilation valve peculiar to vessel is the special device of oil carrier, chemical tanker fire safety, its effect is each the cargo tank top that is contained in oil carrier, chemical tanker, be used for discharging transportation and storage process cause owing to temperature variation in the cargo tank pressure and vacuum, and the pressure and the vacuum that produce in loading and unloading goods and the ballast process middle deck, and can stop flame to enter in the cabin effectively.At present, what install on China's overwhelming majority cargo tank is a kind of common inhalation valve (also claiming vent valve), comprise pressure and vacuum valve, be provided with magnetic force in the pressure valve valve pocket and help opening device, can effectively eliminate the flutter phenomenon of valve, but fluid director falling speed is bigger during valve closing, impact force is also big, be easy to generate hammering and cause producing spark, cause and catch fire, and every cargo tank is by an inhalation valve job by public ventilative pipeline, if cargo tank blast, flame will cause that other cargo tank explodes continuously by public ventilative pipeline, gives crewman's life, national wealth causes heavy losses, has not yet to see solution preferably.

The disclosed a kind of vent valve of Korea S, its structure are that gas promotes the lever on the valve rod, and valve port is opened.The shortcoming that exists is that the cracking pressure of valve can only be a scope, rather than an absolute value, and boats and ships meet stormy waves under sail or when jolting, valve is opened easily, causes the frequent release of gas and causes damage.

The model utility content

At the above-mentioned deficiency of existing in prior technology, the purpose of this utility model is that a kind of high-speed breather valve for oil tanker will be provided, and it can stablize the unobstructed discharge oil gas of Open valve, can reduce the impact force of fluid director again when valve closing, eliminate hammering, ensure the safety of lives and properties.

In order to solve the problems of the technologies described above, the scheme of the utility model technical solution problem is: high-speed breather valve for oil tanker, mainly comprise pressure valve, vacuum valve, fluid director, described pressure valve is by deflector, upper valve body, three grades of serial connections of valve body constitute under the threeway, described deflector is fixed in the top of described upper valve body, described vacuum valve is fixedlyed connected with side of valve body port under the described threeway, one valve rod places in described upper valve body and the described deflector die cavity, described deflector and fixedly connected described fluid director are stretched out in this valve rod top, the magnetic force adjustable lever is housed in this valve rod, being provided with in the described deflector die cavity is placed on the described valve rod and the permanent-magnetic clamp of corresponding described magnetic force adjustable lever, described stem lower portion is connected with pouring weight, also is connected with damping fin on the described valve rod of described fluid director below.

After adopting such scheme, the utility model high-speed breather valve for oil tanker adopts pouring weight, magnetic force and damping fin structure combining, in valve rod, insert adjustable lever, in deflector, insert fixing permanent-magnetic clamp, when valve is in closed condition, the N utmost point is inhaled mutually with the S utmost point, make valve closed tightly, its closing pressure can also be regulated from magnetic intensity and pouring weight quality aspect etc. when just having opened under the pressure that valve is being set, the thrust that its oil gas makes progress is more than or equal to magnetic field suction and pouring weight gravity sum, separating along with the N utmost point and the S utmost point behind the valve opening, magnetic force disappears substantially, oil gas thrust is greater than pouring weight gravity this moment, and fluid director is upwards pushed away deflector by oil gas, and valve is in stable opening state, because fluid director is from the static opening state that moves on to, speed is little, thereby the resistance that damping fin produces is very little, and promptly damping fin does not have influence substantially to the unlatching of valve; When oil-air pressure reduces gradually and cause fluid director to fall after rise, because the N utmost point and the S utmost point are close gradually, magnetic field suction significantly strengthens, the falling speed of fluid director has the trend of increase, but after speed increased, damping fin produced the resistance that the increase with speed increases thereupon, and this resistance makes the impact force that fluid director falls back on the deflector decline to a great extent, fall after rise gently, can not produce spark because of bump.Behind the valve closing, magnetic attraction increases to maximum, and with pouring weight gravity fluid director is held on the deflector, makes fluid director that the flutter phenomenon not take place.Realize the valve safety shutdown, promptly damping fin can stop fluid director to fall excessive velocities after rise in the valve closing process and cause hammering to produce spark.

When loading liquid goods and ballast, the pressure valve of high-speed ventilation valve is opened, flammable liquid goods vapor/air mixture vertically upward sprays in the cargo tank, and in the high-altitude by atmospheric dilution, dissipation and can not be settled down to liquid goods deck, inflammable gas more can not strile-back and rest on valve port, has avoided may causing the danger of blast because of meeting fire; When unloading discharge opeing goods, the vacuum valve of high-speed ventilation valve is opened, and can replenish air safely in the cabin, to avoid producing excessive vacuum in the cabin; Thereby during ship's navigation, high-speed ventilation valve can be regulated the fluctuation of the cabin internal pressure that causes owing to temperature variation automatically.

Description of drawings

Fig. 1 is the structural representation of the utility model high-speed breather valve for oil tanker.

Among Fig. 1, fluid director 1, valve rod 2, deflector 3, magnetic force adjustable lever 4, permanent-magnetic clamp 5, last fixed-wing 6, upper valve body 7, pouring weight 8, damping fin 9, nut 10, following fixedly Ji 11, valve body 12 under the threeway, pressure valve operating grip 13, vacuum valve operating grip 14, vacuum valve 15.

Embodiment

High-speed breather valve for oil tanker as shown in Figure 1 mainly comprises pressure valve, vacuum valve 15, fluid director 1, and vacuum valve 15 is connected in valve body 12 1 sides under the threeway of pressure valve.Pressure valve is made of 12 3 grades of serial connections of valve body under deflector 3, upper valve body 7, the threeway.One valve rod 2 places in upper valve body 7 and deflector 3 die cavities, deflector 3 and fixedly connected fluid director 1 are stretched out in its top, magnetic force adjustable lever 4 is housed in the valve rod 2, be provided with in deflector 3 die cavities and be placed on the valve rod 2 and the permanent-magnetic clamp 5 of corresponding magnetic force adjustable lever 4, permanent-magnetic clamp 5 is fixing by the last fixed-wing 6 that is fixed in deflector 3 die cavities, valve rod 2 bottoms connect pouring weight 8 and damping fin 9, damping fin 9 is fixed on pouring weight 8 bottoms by nut 10, and insert in the center hole that is fixed on the following fixed-wing 11 in valve 12 die cavities under the threeway valve rod 2 bottoms.Eccentric cam on the following valve body 12 and handle 13 cooperate realization manually opened with valve rod 2 bottoms, vacuum valve 15 suction ports are provided with two-layer flame screen.

The top of valve body 7 also is provided with the discharging rainwater installation under the threeway, is used for discharging the rainwater that immerses from deflector 3 oral areas.

Pressure valve vertically is installed on the cargo tank top, during cargo tank ballasting, the cabin internal pressure increases, when pressure reaches valve setpoint unlatching numerical value, oil gas is by descending valve body 12 vertically upward with fluid director 1 jack-up, magnetic force adjustable lever 4 separates with permanent-magnetic clamp 5, and oil gas penetrates from deflector 3 oral areas and fluid director 1 gap location vertical up-spray through upper valve body 7.Shape and size by appropriate design deflector 3 and regulate the pouring weight quality can satisfy behind the valve opening oil gas vent flow velocity greater than the requirement of 30m/s.Because the damping function of damping fin 9 can not take place between fluid director 1 and deflector 3 oral areas to clash into and the generation spark strongly, guarantee the safety shutdown valve during valve closing.At this moment, vacuum valve 15 is in sealing state.When the cargo tank internal pressure is reduced to less than atmospheric pressure, and when reaching vacuum valve 15 cracking pressures, vacuum valve 15 valves will be opened automatically, and air valve body 12 under the pressure valve threeway enters in the cargo tank, and this moment, pressure valve was in sealing state by gravity and magnetic field suction.When pressure valve was worked, vacuum valve 15 cut out, and two valve disjunctors are ganged up, and Each performs its own functions during work.In pressure valve when work,, fluid director 1 unlatchings that raise along with the increase of oil-air pressure in the cargo tank reduces and falling is closed.Handle 13 under the threeway on the valve body 12 and eccentric cam cooperate the manually-operable that realizes pressure valve with valve rod 2 bottoms.Equally, vacuum valve 15 is also right realizes manually-operable by handle 14.

Claims (2)

1, a kind of high-speed breather valve for oil tanker, mainly comprise pressure valve, vacuum valve (15), fluid director (1), described pressure valve is by deflector (3), upper valve body (7), (12) three grades of serial connections of valve body constitute under the threeway, described deflector (3) is fixed in the top of described upper valve body (7), the lateral port of valve body (12) is fixedlyed connected under described vacuum valve (15) and the described threeway, one valve rod (2) places in described upper valve body (7) and described deflector (3) die cavity, described deflector (3) and fixedly connected described fluid director (1) are stretched out in this valve rod (2) top, magnetic force adjustable lever (4) is housed in this valve rod (2), be provided with in described deflector (3) die cavity and be placed on the described valve rod (2) and the permanent-magnetic clamp (5) of corresponding described magnetic force adjustable lever (4), described valve rod (2) bottom is connected with pouring weight (8), it is characterized in that: also be connected with damping fin (9) on the described valve rod (2) of described fluid director (1) below.

2, according to the described high-speed breather valve for oil tanker of claim 1, it is characterized in that: described damping fin (9) is fixed in the bottom of described pouring weight (8) by nut (10).

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