JPS62166190A - Tank structure - Google Patents

Abstract

PURPOSE:To prevent asphalt from sticking or accumulalting on a bottom wall, side wall, etc. of a tank by forming through holes in a tank bottom lateral frame erected on the tank bottom wall thereby securing specified fluidity of asphalt. CONSTITUTION:In a tank bottom lateral frame 21 are formed multiple through holes 24 which are cut open down to the tank bottom wall 22 and are made to communicate between multiple holes with each other. Especially on the central bulkhead 15 side of the lateral frame 21 which is the lowest part in a tank 20 is formed a specified size of through hole 24A. The tank bottom wall 22 is sloped by an angle of theta so that its central bulkhead 16 side becomes the lowest.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tank structure, and more particularly to a tank $11 iff for an asphalt tanker.

<Prior Art> Generally, an asphalt tanker has a tank in the hull, the outer periphery of which is covered with a heat insulating material, and this tank is usually divided into left and right sides by a bulkhead.

Additionally, this tanker has loading piping, unloading piping equipped with pumps, etc., and incidental equipment such as manholes.

As a conventional tank structure of an asphalt tanker, for example, the one shown in FIG. 7 is known. As shown in the figure, the tank inner wall (
2), a tank bottom stringer (3) and a tank side stringer (4) extending in the vertical direction are provided as reinforcing members, and the tank bottom wall (2A) is provided with a tank bottom stringer (3) extending in the horizontal direction. A tank bottom horizontal frame (5) is provided to protrude at a predetermined height. In addition, a pair of temperature measuring members (
6A) (6B) are provided protrudingly.

<Problems to be Solved by the Invention> However, in the tank structure of such a conventional asphalt tanker, the bottom of the tank is completely partitioned into multiple sections by the horizontal frame, and the height of the horizontal frame is is high.

In addition, due to the fact that the bottom wall of the tank is horizontal and that multiple longitudinal members protrude from the inner wall, approximately 3.
Approximately 1% of the total tank capacity after using the tank for about 2 to 4 years.
An amount of asphalt equivalent to 0% to 15% is deposited in the tank. As a result, there is a reduction in shipping volume, wastage of marine fuel oil due to ships operating in piled-up conditions, removal of piled-up asphalt,
There were problems in that a considerable amount of time and work costs were wasted due to the removal work, the commercial value of the removed asphalt was lost, and a huge amount of damage was caused, such as the cost of disposing of the asphalt.

Means for Solving the Problems> The present invention comprises a tank body fixed in a ship's hull, a heat insulating material covering the outer surface of the tank body, and a heat insulating material erected on the bottom wall of the tank body, In a tank structure including a tank bottom tank frame that divides the tank bottom into a plurality of sections, and a tank bottom longitudinal member and a tank side longitudinal member that reinforce the tank body, the tank bottom tank frame has the divided sections connected to each other. A communicating through hole is formed, the tank bottom stringer and tank side stringer are moved to the outside of the tank, and the tank bottom wall is sloped.

<Function> In the tank structure according to the present invention, since the through hole is formed in the tank bottom tank frame installed on the tank bottom wall, the asphalt at the tank bottom flows through this through hole, and the tank bottom vertically Since the threading material and tank side longitudinal material are not on the inner wall of the tank and the bottom wall of the tank is also sloped, the specified fluidity is ensured and almost all of the material can be lifted without adhesion or accumulation on the bottom wall or side walls of the tank. It can be discharged from cargo piping, etc.

<Example> Embodiments of the present invention will be described below based on the drawings.

1 to 3 show an embodiment of the present invention.

As shown in these figures, an asphalt tanker (11
) has a tank body (13) fixed inside the hull (12), and the outer surface of this tank body (13) is covered with a heat insulating material (14).
).

As this heat insulating material (14), for example, rock wool or the like is used. As shown in FIGS. 2 and 3, the tank body (13) is divided into three parts in the longitudinal direction of the hull, and is also divided into two parts in the left-right direction of the hull by the central bulkhead (16). In addition, (17) shows the pump room provided at the rear of the tank body (13), (18) shows the engine room, and (19) shows the living area.

Here, as shown in detail in FIG. 1, in each divided tank (2o), a tank bottom tank frame (21) that crosses the inside of the tank (20) in the left-right direction stands on the tank bottom wall (22). It is set up. Both ends of the tank bottom frame (21) are fixed to the central partition wall (16) and the tank side wall (23) to reinforce them. Further, the protruding height of the horizontal frame (21) is set as low as possible compared to the conventional one. Therefore, the tank bottom is divided into a plurality of sections in the front-rear direction by the tank bottom tank frame. Here, this tank bottom frame (2
A plurality of through holes (24) are formed in 1), and these through holes (24) are cut out to the tank bottom wall (22) to communicate the plurality of sections. Especially the tank (20
) A through hole (24A) of a predetermined size is formed at the end of the horizontal frame (21) on the side of the central partition wall (16) (at the corner of the frame). In addition, this tank bottom 4 ((24) is inclined by a predetermined angle Jσ(θ) so that the center partition wall (16) side is the lowest (first
(see figure).

Furthermore, the tank body (13), that is, the tank side wall (
23) and the tank bottom wall (22), a plurality of tank side stringers (25) and tank bottom stringers (26) extending in the longitudinal direction of the hull as reinforcing members are fixed to their outer surfaces, respectively. There is. That is, while the protrusions are removed from the inner surfaces of the tank side wall (23) and the tank bottom wall (22), the stringers (25) and (26) are covered with the heat insulating material (14). It is.

In addition, as shown in Fig. 1, on the inner surface of the tank side Q (23), there is a pair of upper and lower temperature measuring parts (27A) at a predetermined height position.
27B) is provided protrudingly. These temperature measuring parts (27A)
(27B) is coated with a fluororesin-based film having release properties.

The through hole (24) is so-called doubling that its peripheral edge is doubled with a reinforcing plate to prevent a decrease in strength due to stress concentration or the like. Also, the central partition wall (1) is the lowest part in the tank (20).
On the 6) side and the stern side, a pump inlet is provided, and the associated equipment such as piping is also arranged inside the tank.

Furthermore, if a reinforcing member such as a side wall is separately provided inside the tank (20), a through hole is formed in the upright part of the bottom wall, and a through hole is formed in the part that protrudes horizontally within the tank. A predetermined slope is formed on the upper surface.

Next, the effect will be explained.

The asphalt tanker (11) stores and transports asphalt in each tank (20), but in this case, asphalt adheres to and accumulates on the protruding parts into the tank.
In this embodiment, the through hole (2
4) and by reducing the height of the horizontal frame (21), the flow of asphalt at the bottom of the tank is improved.

The asphalt is maintained at a predetermined temperature by the heat insulating material (14) and has predetermined viscosity and fluidity. In addition, since the bottom wall (22) of the tank is sloped, the amount of asphalt remaining at the bottom of the tank (20) during discharge (unloading) by the pump is reduced, and the amount of asphalt deposited is also reduced. Since the stringers (25) and (26) are not projected, asphalt will not adhere or accumulate on them.

In addition, the temperature measuring part (27A)' (2
Since 7B) is coated with a film or the like, it is possible to prevent asphalt from adhering thereto as well, allowing accurate temperature measurement.

In addition, Figure 4 shows a through hole (
24), some of them are formed with light holes (30
). In this case, the flow of asphalt is improved, and the strength of the frame (21) itself can be improved compared to that of the previous embodiment without performing doubling or the like.

Further, FIGS. 5 and 6 respectively show examples of the arrangement of piping inside the tank and its auxiliary equipment. In Fig. 5, there are three tanks (2OA), (20B), (20G), and (20D) on the left and right sides separated by the central bulkhead (16).
(20E) For (20F), single suction pipe (3
1) and each tank (2OA) (20B)
(20C:) (20D) (20E) (20F) have gate valves (32A) (32B) (32C) (3), respectively.
2D) (32E) (32F) and inlet (33A) (3
3B) (33G) (33D) (33E) (
33F). In addition, these inlets (33A) (33B) (33G) (33D) (33E)
(33F) each tank (20A) (20B) (20
C) Attach (16) to the center bulkhead on the stern side of (200) (20E) (20F) (where the asphalt remains at the end). Therefore, in this case, the suction pipe inside the tank (
31) is reduced, and the number of asphalts adhering to this pipe (31) is significantly reduced as a whole.

In Figure 6, each tank (20A) (20B) (2
Independent suction pipe (34A) (34B) (34C) (34D) (34E) for each 0G) (20D) (20E) (20F)
) (34F), and these intake pipe gate valves (3
2A) (32B) (32C) (32D) (32E) (3
2F) are collectively installed in the pump room (17) outside the tank.

According to this, gate valves (32A) (32B) (32G)
Asphalt will no longer adhere to (32D) (32E) (32F).

In addition, in the present invention, the flow U1 body having a predetermined viscosity is 11? This can be applied to tanks that hold water, and can also be applied to tankers other than asphalt.

Effects> As explained above, according to the present invention, as a result of improving the flow of asphalt in the tank, it is possible to prevent asphalt from adhering and accumulating in the tank.

Almost completely preventable. As a result, it has great effects, such as reducing operating expenses and eliminating the expense required to remove accumulated asphalt.

Further, according to the above embodiment, the protrusion inside the tank (reinforcing material,
By eliminating as many auxiliary facilities as possible, asphalt adhesion to them can be significantly reduced. Furthermore, it is possible to almost completely prevent asphalt from adhering to the temperature measurement part, and by accurately measuring the temperature, the state of loaded asphalt can be accurately recognized, and at the same time, it is possible to ensure accuracy in the amount of loaded asphalt.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of essential parts showing an embodiment of a tank structure according to the present invention, Fig. 2 is a side view of an asphalt tanker according to the embodiment, and Fig. 3 is a plan view of the asphalt tanker. , Fig. 4 is a schematic front view showing the tank bottom tank frame, Figs. 5 and 6 are schematic plan views showing the suction piping equipment in an asphalt tanker, respectively, and Fig. 7 is a tank bottom in a conventional asphalt tanker tank structure. FIG. 3 is a vertical cross-sectional view showing the tank frame. (12)... Hull (13)... Tank body (14)... Insulation material (21)... Tank bottom frame (22).
... Tank bottom wall (24) ... Through hole

Claims (1)

[Claims] A tank body fixed in the hull, a heat insulating material covering the outer surface of the tank body, a tank bottom horizontal frame erected on the bottom wall of the tank body and dividing the tank bottom into a plurality of sections, and a tank. In a tank structure comprising a tank bottom longitudinal member and a tank side longitudinal member for reinforcing the main body, a through hole is formed in the tank bottom horizontal frame to communicate the divided sections, and the tank bottom longitudinal member and the tank side longitudinal member are provided. A tank structure characterized by moving the tank side longitudinal members to the outside of the tank and creating a slope on the bottom wall of the tank.