阅读说明：本技术 一种多功能全接液内浮盘中央通气阀 (Multifunctional full-liquid-receiving inner floating disc central ventilation valve ) 是由 孟翔宇 于 2021-02-05 设计创作，主要内容包括：本发明公开了一种多功能全接液内浮盘中央通气阀,包括：密封底座、密封顶杆导向装置、密封压板、密封顶杆、呼吸阀和可调地脚。密封底座,为圆圈状,外圈与全接液内浮盘中心孔对接形成密闭连接,密封底座上端面低于全接液内浮盘上端面；密封底座的底端设有密封顶杆导向装置；密封压板,位于密封底座的外圈上；密封顶杆导向装置,中间为导向管,边缘为支撑结构；密封顶杆,位于导向管之中,其顶部与密封压板底部固定,在密封顶杆底部设有泄油孔；在密封顶杆的底部安装有可调地脚；呼吸阀,被安转在密封压板上。本发明可以解决快速有效的排除浮盘下方的气体集聚,避免产生液泛现象和排除浮盘上方的积液,避免由于积液导致沉盘的技术问题。(The invention discloses a multifunctional full liquid-receiving inner floating disc central vent valve, which comprises: the sealing device comprises a sealing base, a sealing ejector rod guide device, a sealing pressing plate, a sealing ejector rod, a breather valve and an adjustable foot margin. The sealing base is in a circular ring shape, the outer ring is in butt joint with the central hole of the full liquid-receiving inner floating disc to form closed connection, and the upper end face of the sealing base is lower than that of the full liquid-receiving inner floating disc; the bottom end of the sealing base is provided with a sealing ejector rod guide device; the sealing pressure plate is positioned on the outer ring of the sealing base; the middle of the sealing ejector rod guide device is provided with a guide pipe, and the edge of the sealing ejector rod guide device is provided with a supporting structure; the sealing ejector rod is positioned in the guide pipe, the top of the sealing ejector rod is fixed with the bottom of the sealing pressure plate, and the bottom of the sealing ejector rod is provided with an oil drainage hole; the bottom of the sealing ejector rod is provided with an adjustable ground foot; the breather valve is arranged on the sealing pressure plate in a rotating mode. The invention can solve the technical problems of quickly and effectively removing gas aggregation below the floating plate, avoiding flooding phenomenon, removing accumulated liquid above the floating plate and avoiding sinking of the floating plate due to the accumulated liquid.)

1. The utility model provides a multi-functional liquid internal floating disk central authorities breather valve that connects entirely, its characterized in that includes: the device comprises a sealing base, a sealing ejector rod guide device, a sealing pressing plate, a sealing ejector rod, a breather valve and an adjustable foot margin;

the sealing base is in a circular ring shape, the outer ring is in butt joint with the central hole of the all-liquid-receiving inner floating disc through a bolt to form closed connection, the upper end surface of the sealing base is lower than the upper end surface of the all-liquid-receiving inner floating disc, a sealing groove is formed in the sealing base and provided with a sealing O-shaped ring, and a sealing ejector rod guide device is arranged at the bottom end of the sealing base;

the sealing pressing plate is positioned on the sealing base, and the sealing O-shaped ring is positioned between the sealing pressing plate and the sealing base;

the middle of the sealing ejector rod guide device is provided with a guide pipe, the edge of the sealing ejector rod guide device is provided with a supporting structure, and the outer end of the supporting structure is connected to the bottom end of the sealing base;

the sealing ejector rod is positioned in the guide pipe, the guide pipe can move up and down on the sealing ejector rod, and the top of the sealing ejector rod is fixed with the bottom of the sealing pressure plate; an oil drainage hole is formed in the bottom of the sealing ejector rod, and an adjustable foot margin for adjusting the opening height of the sealing press plate is mounted at the bottom of the sealing ejector rod;

the breather valve is used for discharging gas accumulated below the full liquid-receiving inner floating disc and is arranged on the sealing pressure plate;

and the electrostatic connecting cable is connected between the sealing pressure plate and the sealing base.

2. The multifunctional all-liquid-receiving inner floating disc central ventilation valve as claimed in claim 1, wherein the sealing pressure plate and the sealing ejector rod are made of a material which does not generate static electricity.

3. The central ventilation valve of the multifunctional all-liquid-receiving inner floating disc as claimed in claim 1, wherein the sealing pressure plate and the sealing ejector rod are made of aluminum alloy.

4. The multifunctional full liquid-receiving inner floating disc central ventilation valve as claimed in claim 3, wherein the sealing ejector rod guide device is provided with a guide pipe in the middle and a support structure at the edge, and the guide pipe is welded at the lower end of the sealing base by adopting 3 or 4 support structures.

5. The multifunctional full liquid-receiving inner floating disc central ventilation valve as claimed in claim 1, wherein the adjustable feet are aluminum alloy square tubes.

Technical Field

The invention relates to an improved technology of an internal floating roof storage tank for finished oil and light oil.

Background

In order to improve the environment and reduce the discharge of VOCs, the current state requires to reduce the discharge of VOCs in a storage tank, mainly an inner floating roof storage tank for finished oil and light oil, and requires to modify the existing inner floating roof storage tank. The first one is to use the full liquid-receiving inner floating roof to replace the existing large-scale used floating-barrel-type inner floating roof; the second is to use an efficient edge seal instead of the non-efficient edge seals that are currently used in large numbers.

However, in the actual floating roof tank rebuild process, a series of problems arise, mainly two-fold. The first is that the treatment of the VOCs in the storage tanks does not reach the expected target, and the discharge of the VOCs in some storage tanks is still high; the second is that the safety of the prior full-liquid-receiving inner floating roof floating plate is reduced, and a multi-rising sinking plate accident occurs.

A large amount of VOCs leaks and sinks, and the phenomenon is mainly caused by two reasons, namely flooding, and effusion above the floating plate.

In the actual production process, oil and entrained gas are inevitable. The oil-bearing gas is mainly caused by two aspects, the first is that a large amount of gas is generated in the oil refining production process, and before a medium enters a storage tank, the gas is generally subjected to gas elimination treatment, but the gas cannot be completely eliminated, and a small amount of gas still enters the storage tank; the second is that the solubility of the gas in the liquid increases with the increase of the pressure, in the production process and the pipeline, because of the higher pressure, a part of the gas is dissolved in the medium, when the medium enters the storage tank, the part of the gas is separated out because of the reduction of the pressure, and the part of the gas cannot be removed through the degassing device.

In the top floats in old-fashioned buoy formula, between liquid level and covering, there is certain gas phase space, come the gas that oil was taken to be discharged in this space, make the pressure increase in the space, because the covering of buoy formula floating deck is the concatenation, can't accomplish completely airtight, reveal the floating deck upper portion gradually through the gap, the VOCs that the evaporation of a part of simultaneously produced also along with revealing, that is to say the total amount of the VOCs who discharges this moment is "come the VOCs that oil was taken the gas to produce to reveal + the VOCs that the liquid level volatilizees to produce leaks", this is exactly the great leading reason of old-fashioned buoy formula floating deck leakage quantity. The new connect liquid internal floating roof is because connect liquid completely, reveal "the VOCs that the liquid level volatilizes and produce" almost all eliminate, theoretically only leave "the VOCs that comes the oil to bring the gas to produce reveals", reveal the volume can greatly reduced (according to statistics and calculation, the VOCs that the liquid level volatilizes reveals the volume and is greater than the VOCs that comes the oil to bring the gas to produce far away and reveal the volume). However, the gas phase space below the floating plate is completely eliminated by the full liquid receiving floating plate, so that a new problem is brought, namely that the gas with gas from the oil can go everywhere, and the gas can be gathered below the floating plate and cannot be discharged. Secondly, on the inner floating plate, because the edge part needs to be provided with a seal, a higher edge plate is needed, meanwhile, the thickness of the edge plate is generally larger than that of the floating plate body for the requirement of strength, and the edge seal also has certain weight, so that the weight of the edge of the floating plate is larger than that of the middle of the floating plate, and in the old floating plate type floating plate, the problem is generally solved by increasing the density of the edge float.

However, in the new full-liquid-receiving inner floating plate, the full-liquid-receiving inner floating tops are all inner floating tops with consistent thickness for the convenience of production and installation, so that the immersion liquid depth of the edges is larger than that of the middle floating plate due to the fact that the weight of the edges is larger than that of the middle floating plate, and gas with gas coming from oil is mainly gathered in the middle of the floating plate.

Because most all connect liquid floating plates now and be concatenation formula floating plate, have a large amount of concatenation gaps, once a concatenation gap produces and reveals, the gas that gathers will be all revealed by gap department to because the speed of bleeding of gas is very fast and the gap is very little, will have a large amount of oils to be taken to the floating plate by gas, this is the flooding phenomenon. Secondly, the storage medium of the normal pressure storage tank is a liquid medium at normal temperature, and at night, the evaporated medium can be condensed on the tank wall and the top of the storage tank to form a large amount of liquid drops, and the liquid drops can drop above the floating plate to a certain degree, and the liquid drops are flooded, so that liquid accumulation can be generated above the floating plate. Flooding and liquid accumulation can have two adverse effects on the floating plate. Firstly, the evaporation of the medium can generate a large amount of VOCs leakage which is far larger than the leakage of the floating disc; inside the second hydrops probably entered into the floating plate, the buoyancy of floating plate flotation tank reduced, and floating plate weight increases, if unable in time get rid of the hydrops, produces heavy dish when serious.

In summary, since the new all-liquid-receiving inner floating plate has a different structure from the original old float-type floating plate, it is necessary to add a new accessory to the all-liquid-receiving inner floating plate in order to prevent flooding and liquid accumulation. The main effects are two, the first can rapidly and effectively eliminate gas aggregation below the floating plate, and avoid the flooding phenomenon; the hydrops above the floating plate can be got rid of to the second, avoids leading to heavy dish because of the hydrops.

Disclosure of Invention

The invention aims to provide a multifunctional full-liquid-receiving inner floating disc central vent valve, which aims to solve the technical problems of quickly and effectively removing gas accumulation below a floating disc, avoiding the occurrence of a flooding phenomenon, removing accumulated liquid above the floating disc and avoiding sinking of the disc due to the accumulated liquid.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a multifunctional full liquid-receiving inner floating disc central vent valve comprises: the device comprises a sealing base, a sealing ejector rod guide device, a sealing pressing plate, a sealing ejector rod, a breather valve and an adjustable foot margin;

the sealing base is in a circular ring shape, the outer ring is in butt joint with the central hole of the all-liquid-receiving inner floating disc through a bolt to form closed connection, the upper end surface of the sealing base is lower than the upper end surface of the all-liquid-receiving inner floating disc, a sealing groove is formed in the sealing base and provided with a sealing O-shaped ring, and a sealing ejector rod guide device is arranged at the bottom end of the sealing base;

the sealing pressing plate is positioned on the sealing base, and the sealing O-shaped ring is positioned between the sealing pressing plate and the sealing base;

the middle of the sealing ejector rod guide device is provided with a guide pipe, the edge of the sealing ejector rod guide device is provided with a supporting structure, and the outer end of the supporting structure is connected to the bottom end of the sealing base;

the sealing ejector rod is positioned in the guide pipe, the guide pipe can move up and down on the sealing ejector rod, and the top of the sealing ejector rod is fixed with the bottom of the sealing pressure plate; an oil drainage hole is formed in the bottom of the sealing ejector rod, and an adjustable foot margin for adjusting the opening height of the sealing press plate is mounted at the bottom of the sealing ejector rod;

the breather valve is used for discharging gas accumulated below the full liquid-receiving inner floating disc and is arranged on the sealing pressure plate;

and the electrostatic connecting cable is connected between the sealing pressure plate and the sealing base.

The sealing pressure plate and the sealing ejector rod are made of materials which do not generate static electricity.

The sealing pressure plate and the sealing ejector rod are made of aluminum alloy materials.

The middle of the sealing ejector rod guide device is provided with a guide pipe, the edge of the sealing ejector rod guide device is provided with a supporting structure, and the guide pipe is welded at the lower end of the sealing base by adopting 3 or 4 supporting structures.

The adjustable ground feet are aluminum alloy square tubes.

The invention has the advantages and positive effects that:

1. can effectively eliminate gas accumulation generated in the center of the floating plate in the full liquid receiving.

2. The accumulated liquid of the full liquid receiving inner floating disc can be automatically discharged.

3. Effectively reduces the discharge concentration of VOCs of the whole storage tank.

4. The danger of sinking the disc due to the accumulated liquid is eliminated, and the safety of the floating disc and the whole storage tank is greatly improved.

5. Simple structure is reliable, utilizes current ripe product, need not carry out long-time experiment, can directly put into use.

6. The operation of whole floating plate is easy to operate, does not need new extra operation, and when the floating plate hydrops, only need to fall to the ground to operate, just can realize automatic flowing back function.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view showing the state of the present invention in which the floating plate is pressed down.

Fig. 3 is a schematic view of the installation of the present invention.

Detailed Description

The invention relates to a multifunctional full liquid-receiving inner floating disc central vent valve, which comprises: the device comprises a sealing base, a sealing ejector rod guide device, a sealing pressing plate, a sealing ejector rod, a breather valve and an adjustable foot margin; the main structural design is shown in figure 1.

The sealing pressing plate 01 is made of aluminum alloy, mainly plays a role in sealing with the sealing base 02, and can prevent static electricity from being generated due to collision or friction with a stainless steel structure below due to the fact that the aluminum alloy is made of a material which does not generate static electricity. To ensure the sealing effect, the surface of the aluminum alloy is finely processed.

Sealing base 02, for the circle form, the outer lane passes through the bolt and connects the interior floating plate 10 centre bore butt joint of liquid entirely and form airtight connection, and sealing base's up end is less than and connects the interior floating plate 10 up end of liquid entirely, is equipped with the seal groove on it and installs sealed O type circle 06, and sealing base's bottom is equipped with sealed ejector pin guider.

The sealing ejector rod guide device is mainly divided into two parts, the middle part is a guide pipe 03, and a stainless steel round pipe is adopted, and the stainless steel round pipe is a round pipe with the diameter of 60 mm and the wall thickness of 2.5mm in the design of the invention; the edge is the bearing structure, adopts 3 or 4 bearing structures, welds bearing structure 03 on sealed base 02.

The sealing ejector rod 04 is integrally made of aluminum alloy materials, the danger that static electricity is generated due to friction between the ejector rod and the lower sealing seat guide pipe is avoided, a phi 6 oil drainage hole is formed in the bottom of the ejector rod, oil is prevented from being stored in the ejector rod, potential safety hazards are eliminated, an adjustable ground pin is arranged at the bottom of the ejector rod, and the opening height of the valve cover is adjusted conveniently.

And the sealing gasket 05 is matched with the sealing base for installation, so that the sealing base is prevented from being leaked.

The sealing O-shaped ring 06 is installed between the sealing pressing plate and the sealing seat, rubber materials are used, different materials are selected according to different media, and the sealing effect of the central vent valve can be guaranteed to the maximum extent by the O-shaped ring and the aluminum alloy pressing plate matched with high-precision machining.

The static connection cable 07 prevents static electricity from existing between the valve cover and the valve body.

And a breather valve 08 for discharging gas accumulated below the full liquid-receiving inner floating disc.

In fig. 1, 9 is a liquid surface.

The working principle of the invention is as follows:

1. automatic exhaust function

In order to automatically discharge gas accumulated below a floating disc, an automatic breather valve is arranged on a sealing cover plate, in the invention, an automatic breather valve with the diameter of 50mm is adopted, an automatic air-eliminating device is arranged on an incoming oil pipeline in the prior art, the amount of gas carried by incoming oil is generally small, the automatic breather valve with DN50 is adopted to sufficiently discharge the accumulated gas, the pressure adopts the A-level standard of a standard breather valve SY/T0511.1-2010 petroleum storage tank accessory, namely-295- +355Pa, the thickness of a full-joint liquid floating disc is generally 80-200mm, the buoyancy ratio is generally 2-2.5 times, the depth immersion liquid of all full-joint liquid inner floating discs is generally 40-100mm, the liquid level difference generated by the pressure of all 355Pa is less than 40mm, gas accumulated above the floating disc cannot be caused, the design requirement of the invention is met, and meanwhile, in various chemical media, the saturated vapor pressure is generally less than 100Pa, and in normal use, the breather valve can not be opened, and additional gas volatilization can not be caused.

2 automatic effusion removing function

In order to automatically discharge accumulated liquid above the floating disc, the sealing base 2 of the vent valve is arranged to be 10mm lower than the upper surface of the floating disc on the design, as shown in figure 2.

Therefore, when the accumulated liquid is generated above the floating disc, the accumulated liquid above the floating disc can be automatically discharged below the floating disc only by grounding the floating disc and lifting the valve cover formed by the sealing pressing plate. Referring to fig. 3, in the design of the present invention, in order to better remove the accumulated liquid on the floating plate, in the design of the leg of the floating plate, the design that the edge is higher than the middle is adopted, so that when the floating plate falls to the ground, the center of the floating plate is the lowest point, which is more beneficial to removing the accumulated liquid above the floating plate.

In conclusion, the technology of the invention is improved as follows:

1. the design of lower than the upper surface of the floating plate is adopted to solve the problem of liquid accumulation of the floating plate.

2. The problem of gas accumulation below the full liquid-receiving floating plate is solved by adopting a mode of additionally installing a breather valve.

3. The floating plate supporting legs are adopted to adjust the overall height of the floating plate, so that the lowest point is arranged in the middle when the floating plate falls to the ground.

4. The reliability of the multifunctional central exhaust valve is improved by adopting the existing standard breather valve.

5. The moving parts are made of aluminum alloy materials, so that the safety of the multifunctional exhaust valve is enhanced.

6. The mode of automatic liquid drainage when falling to the ground is adopted, so that the safety of the floating disc and the storage tank is enhanced.

The invention has two functions besides the function of the original automatic ventilation valve; the breather valve has the advantages that the breather valve has the function that when gas generated below the floating plate is gathered to a certain degree, the gas is automatically discharged; and secondly, the liquid discharging function of falling to the ground requires that when the floating plate falls to the ground, the accumulated liquid above the floating plate can be automatically discharged, and the plate is prevented from sinking.