JPS5839716B2 - floating roof tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The disclosed technology belongs to a technology that melts snow falling on the floating roof of a floating roof tank constructed in a cold region by sprinkling water on it.

Therefore, the present invention provides a floating roof in which snow melting water is sprayed from a water sprinkler pipe installed around the floating roof by connecting it to a water supply pipe installed on the outside of the tank body through a joint such as a flexible hose. This relates to type tanks, and in particular, a water supply pipe is installed vertically along the side plate of the tank, and a water supply port is branched into an opening provided at the top of the side plate and the lowest part of the elevating floating roof, while the water supply pipe is On the other hand, this invention relates to a floating roof type tank in which a blind lid is considered, and water is supplied by connecting the flexible joint of the ringed sprinkler pipe to an open water supply port.

As is well known, various types of petroleum storage tanks are designed and adopted, whether above ground or underground, but due to their simple structure, design methods have been established and manufacturing is easy. So-called floating roof tanks are widely used because of their advantages such as ease of use, low cost, and easy maintenance, as well as their large capacity and good operational performance.

By the way, with the recent focus on energy conservation issues, the stockpiling of petroleum has become a major issue, and not only service tanks but also large-capacity stockpiling tanks have been installed in large numbers, and moreover, regional They are now being built nationwide as much as possible, from warm to cold regions, without being biased.

In this case, seasonal conditions do not matter much for tanks built in warm regions, but snow damage from snowfall becomes a problem in cold regions.

That is, when a floating roof type tank is enlarged for stockpiling, there is a risk that if snow accumulates on the floating roof, uneven slope may occur due to snowdrifts, sealing failure may occur, or snow may infiltrate.

To deal with this, we installed a sprinkler pipe with many nozzles on the floating roof and connected it via a flexible hose to the water supply pipe that extends to the top on the outside of the side panel of the tank, supplying water and sprinkling water. has been developed as a snow melting means, but although this type of means can melt snow by spraying water when the tank is full or before and after the tank is full and when going up and down, it is possible to melt snow by spraying water when the tank is full or when the floating roof In this situation, the flexible hose had the disadvantage that it expanded and contracted significantly, and the hose had no lateral support, so it swayed greatly in the wind and deteriorated, and was unstable as it danced from side to side when water was being supplied.

By the way, a stockpiling plant has a large number of tanks installed, and due to the nature of the plant, it is not possible to constantly receive and ship oil from each tank, and most of the tanks are used either full or empty. There are special characteristics that can be used.

In this empty tank state, the low floating roof and the inside of the side panels may become a kind of snow storage container, and in this case, it is still necessary to melt the snow.

However, as mentioned above, under these conditions, it was difficult to maintain a constant supply of snowmelt water.

The purpose of this invention is to solve the problem of snow melting of the floating roof type tank built in a cold region based on the above-mentioned conventional technology, and to supply snow melting water to the snow accumulated on the floating roof of the tank at the top of the side plate when the tank is full.
We aim to provide an excellent floating roof tank that can effectively melt snow on the floating roof in both conditions by providing a switching system for water supply pipes and flexible joints that performs water supply through the side plate when the tank is empty. It is something.

The structure of the present invention in accordance with the above object is that when the floating roof tank is full, or when the snow that falls on the floating roof is removed when the tank is in this state, a water supply pipe is installed at the top of the side plate. The water supply port of the tank is connected to the flexible joint of the circular sprinkler pipe on the floating roof for watering, and the other branch water supply ports are equipped with blind covers, and when the tank is empty or In the case of receiving and sweeping, the water supply pipe is branched and the water supply port opened at a predetermined part of the side plate is connected to the flexible joint to melt snow on the lower floating roof, and the top water supply port is blind. The gist is that the bottle can be closed with a lid.

Next, one embodiment of the present invention will be described below based on the drawings.

1 is a floating roof type tank that forms the gist of the present invention, and is one of the tanks for a stockpiling complex installed in a cold region, for example, an area with heavy snowfall. As is well known, a seal 5 is attached to the cylindrical side plate 4 of
A double-deck type floating roof 8 is provided on the stored oil 7 by means of a po/toon 6 so as to be movable up and down.

As for the floating roof 7, a ring-shaped sprinkler pipe 11 is installed on the upper surface 9 of the floating roof 7 through a stand 10 with a large number of snow melting water injection holes 12, 12, . . . has been done.

As mentioned above, the floating roof/tank 1 of the floating roof 7 is a stockpiling plant, so it is almost full and is at the top as shown by the solid line in Figure 1, and when the tank is completely discharged it is at the top as shown by the dotted line. Several empty tanks are supported by the stand 13 and are at the lowest position.

Therefore, in this invention, the water supply pipe 14 that is vertically piped along the tank side plate 4 is branched, and a water supply port 17 supported by a bracket 16 at the top end 15 of the side plate is connected to a set position from the lowest point of the floating roof 7. A water supply port 19 is provided in the side plate 4 at a high portion and opens into the outwardly protruding cavity 18, and can be closed tightly with a blind lid 20 via a bolt.

Further, a flexible hose 22 as a bellows-type flexible joint connected to a water conduit 21 provided in the annular sprinkler pipe 11 is connectable.

In addition, 23 is a drain pipe, and is provided to penetrate the side plate 4 from the oil 8 via a siebel joint 24.

In the above configuration, while the stockpiling floating roof tank 1 was full and being stockpiled like many tanks in the adjacent area, snow fell and the floating roof tank at the top of the solid line in Figure 1 Roof γ
When snow begins to accumulate on the ground, the supply port 11 of the top 15 of the side plate 4 and the flexible hose 2 are connected in advance as shown in the solid line in Figure 1 and A in Figure 2.
2, and the water supply port 19 in the middle of the side plate 4 is sealed with a blind cover 20, so that water can be supplied from the water supply pipe 14 to the top 1.
The water is supplied to the sprinkler pipe 11 through the flexible hose 22 only from the water supply port 17 of No. The water is drained.

The water supply path caused by swinging, displacement, and elevation of the floating roof 7 due to wind and sloshing is absorbed by the flexible hose 22.

In addition, when the floating roof 7 is lowered by discharging the stored liquid 8, the seal 5 is such that the water supply port 19 is tightly plugged with the blind lid 20 in the outwardly protruding cavity 18, so that the smoothness of the inner surface of the side plate 4 is not disturbed in any way. If the flexible hose 22 moves up and down smoothly and there is no snowfall, the flexible hose 22 can be removed from the water supply port 17, or even if it is left connected, the bellows will absorb enough water.

In many cases, several tanks out of the large number of storage tanks are used for dispensing, and a predetermined tank state continues until the next time receiving is carried out.

In such a state, the floating roof 7 is at the lowest position as shown by the dotted line in FIG.

Therefore, even in the empty tank state, if snow melting measures are not taken, unequal loads will be applied, and there is a risk that the receiver may tilt when it is inserted.

Therefore, in order to deal with this problem, as shown in FIG. 2B, the opening 1
Remove the blind cover 20 of the water supply port 19 of No. 8, seal the blind cover 20 to the water supply port 17 of the top 15, connect the flexible hose 22 to the water supply port 19 to supply water, and spray holes 12, 12...
Water is sprinkled from the drain pipe 23, and the snowmelt water is drained through the drain pipe 23.

Therefore, even in this state, snow melting is reliably performed, and depending on the position of the water supply port 19, the rise and fall of the floating roof due to the removal of the water at a lower level can be absorbed by the bellows of the flexible hose 22.

It goes without saying that the embodiments of the present invention are not limited to the above-mentioned embodiments. For example, another water supply port may be branched in the middle of the side plate 4 to selectively connect the blind lid and the flexible hose. Various aspects are possible.

Further, a gate valve may be installed at each branch, or in that case, the blind cover may be omitted.

As described above, according to the present invention, in a floating roof type tank built in a cold region, water is supplied from the water supply pipe piped outside the tank body to the side plate corresponding to the top of the side plate and a predetermined position of the floating roof. By providing a water inlet and selectively connecting the blind cover to the flexible joint of the sprinkler pipe installed in a ring on the floating roof in relation to the water supply inlet, snow can be prevented from accumulating on the floating roof. In this case, water can be freely sprinkled not only when the tank is full, but also when the tank is empty, and an excellent effect can be achieved in dealing with snow melting.

Further, in this case, the operation is simple because the blind cover of the water supply port and the flexible joint can be simply connected, and there is an advantage that it can be performed quickly and accurately without requiring any skill.

Furthermore, since the structure is simple, it is easy to manufacture and install, it can be attached to an existing tank, and maintenance is easy.

Also, since it is equipped with a flexible joint, it is possible to raise and lower the floating roof even when discharging a full tank and receiving it when it is empty.

In this way, snow can be reliably melted from the upper surface of the floating roof of a large floating roof tank or service tank in a stockpiling plant in a cold region.

[Brief explanation of the drawing]

The drawings are explanatory diagrams of one embodiment of the present invention, with FIG. 1 being an overall schematic explanatory diagram, and FIG. 2 being a partially enlarged explanatory diagram of the state of use. 7... Floating roof, 11... Water pipe, 22
・・・・・・Flexible joint, 4・・・・・・
Frame, 14... Water supply pipe, 1... Tank, 4... Side plate, 15... Top, 18.
...Opening, 17, 19... Water supply port, 2
0...Blind lid.

Claims (1)

[Claims] 1. In a floating roof type tank in which a water pipe is installed around the floating roof and the water pipe is connected to a water supply pipe arranged on the outside of the tank body via a flexible joint, the water supply pipe is attached to the side plate of the tank. Standing piping is installed along the side plate, and a water supply port is branched and provided at the side plate opening corresponding to the top of the side plate and the predetermined position of the floating roof.
On the other hand, a floating roof type tank characterized in that the flexible joint and the blind lid can be connected to each of the water supply ports in reverse and selectively.