JPS60179388A - Refrigerating hold usable as oil tank - Google Patents

Abstract

PURPOSE:To use the inner tank as a refrigerating hold and an oil tank by fixing the inner tank through a heat insulating member to the inner face of steel hull while fixing a steel drainboard to the inner tank to construct a cooling air path. CONSTITUTION:An inner tank 30 is fixed through heat insulating members 38, 50, 58 to the inner face of steel hull constructed with a frame 24, inner bottom board 14, etc. Cooling air paths 82, 46 are formed with steel drainboards fixed to one sideface and the bottom of the inner tank 30. Cooling air is produced by a cooling system on the deck. The inner tank 30 can be utilized as a refrigerating hold as well as normal oil tank. Consequently, fishing fleet can carry fuel to the piscary while returns transporting the fishes under refrigerated state.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides an oil tank for a ship capable of transporting fuel on the outbound trip and frozen fish on the return trip to a fish fleet operating in an emergency. Concerning a reefer ship that can also be used as a hold.

(Prior Art) Far-sea fishing fleets must be refueled during long-term operations. In addition, the fish that are caught must be frozen and transported to designated ports one after another.

Previously, while a dedicated tanker was prepared for refueling, frozen fish had to be transported on a separate reefer ship.

For this reason, tankers are empty on their return trip, and refrigerated ships are empty on their outbound trip, resulting in a problem of poor ship utilization efficiency. Therefore, it is conceivable that one ship could be used as both a tanker and a reefer ship, but in conventional reefer ships, the freezer compartment is made of wooden plywood boards, and the cooling system and cooling pipes are also installed inside the freezer compartment. Tame.

It was impossible to put fuel into this freezer.

Therefore, a part of the hold of one ship was used as a fuel tank.

It is conceivable to use other holds for different purposes, such as using them as freezing rooms, but in this case, some of the holds would always be empty on the outbound and return trips, which would reduce the efficiency of ship utilization.

(Purpose of the Invention) The present invention has been made in view of the above circumstances, and it is possible to use a refrigerated tank as it is as an oil tank for storing fuel, or conversely, after discharging fuel, the inside of the tank can be cleaned and refrigerated. The first object is to provide a freezing boat which can be used as an oil boat and can also be used as an oil boat.

Also, when using a refrigerated tank as a fuel tank.

The weight of the fuel places a very large load on this tank. Creating a separate tank strong enough to withstand this load introduces the additional problem of significantly increasing its weight. A second object of the present invention is to provide a refrigerating tank which can also be used as an oil tank and which is light in weight and can sufficiently withstand a large load when loaded with fuel.

(Structure of the Invention) The present invention provides an inner tank made of a steel plate inside the hull, and is configured so that cooling air is sent into the inner tank from a cooling device installed outside the inner tank and circulated. After being transported, the inside of the inner tank was cleaned with high-pressure cleaning fluid, etc., so that the inner tank could also be used as a freezing tank, thus achieving the first objective.

In addition, the second objective is achieved by dispersing the load of the inner tank over the hull so that the inner tank and the hull cooperate to receive the load. That is, the present invention comprises: an inner tank made of a steel plate which is fixed to a frame on the inner surface of the hull made of a steel plate through an insulating joist member so as to allow slight movement; and 2 a heat insulating material filled between the inner tank and the hull. and a cooling air passage provided at the bottom of the inner tank, and a cooling device disposed outside the inner tank, the cooling air sent from the cooling device being directed into the inner tank through the cooling air passage. While allowing circulation, the inner tank is configured to have an openable and closable ventilation opening communicating with the outside air. (Embodiment) The present invention will be described in detail below based on the embodiment shown in the drawings.

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a partially omitted cross-sectional view taken along the line ■-■, and Fig. 3 is a side view of an embodiment of the present invention.
4 is a sectional view taken along line IV-■, FIG. 5 is an enlarged view of the V section, FIG. 6 is a sectional view taken along line VI-VI in FIG. 1, and FIG. 7 is a sectional view taken along line 6 in FIG. Figure 8 is a detailed view of the part ■, Figure 8 is a sectional view taken along the line ■-■, Figure 9 is a partially sectional perspective view of the inner tank, and Figure 10 is the inner tank used as a refrigerating tank. , FIG. 11 shows the state in which the inner tank is used as an oil tank.

In these figures, the reference numeral 10 indicates a steel hull, and the bottom outer plate 12
．． Inner bottom plate 14. Side outer plate 16. Deck 18° Central bulkhead 20.
A bone frame 22 that runs along the inner surface of the hull 10 in the front-rear direction. It is provided with a rib frame 24 etc. that passes in the horizontal direction and the vertical direction (see FIG. 2).

Inside the hull 10, there are a plurality of left and right inner tanks 3 made of steel plates.
0 is fixed through an insulating joist member to allow slight movement. That is, the bottom plate 32 of the inner tank 30
As shown in FIGS. 3 to 5, particularly in FIG.

It is fixed with bolts 38. The bolt hole on the joist member 36 side through which this bolt 38 passes has a slightly larger diameter than this bolt 38, and the bolt 38 can move slightly within this bolt hole. The upper end of this bolt 38 is connected to the bottom plate 32.
and passes through the washer 40.

While this washer 40 and bolt 38 are welded liquid-tightly,
The peripheral edge of the washer 40 and the bottom plate 32 are also welded in a liquid-tight manner. On this bottom plate 32, a vertical steel plate crosspiece 42 extending in the longitudinal direction of the hull is fixed (Fig. 3), and on this crosspiece 42, a number of slatted boards 44 are placed horizontally (Fig. 5). figure). As a result, the inner tank 30 is located below the slatted board 44.
A cooling air passage 46 is formed that passes through the bottom in the front-rear direction.

A part of the slatted board 44 is made of steel plate and is fixed to the crosspiece 42.

A portion 44a is made of wood and is removable (Fig. 5).

As a result, when the inner tank 3-0 is used as an oil tank, the wooden slatted board 44a is removed and placed on the deck 18.
When cleaning the inside of the inner tank 30, a cleaning device can be inserted into the cooling air passage 46 through the removed grate plate 44a to thoroughly clean the area.

The side plate 48 of the inner tank 30 is fixed with substantially the same structure as the bottom plate 32. That is, a wooden joist member 50 is fixed with bolts to the partition wall 52 fixed to the rib frame 24, and the side plate 48 is fixed to this joist member 50 with bolts so as to allow slight movement.

The upper plate 54 of the inner tank 30 is fixed as shown in FIGS. 6-8. That is, angle-shaped steel beams 56 are suspended vertically and horizontally from the lower surface of the deck 18, and wooden joist members 58 are fixed to the lower surface of the beams 56 with bolts 60. An upper plate 54 is fixed to this joist member 58 with bolts 64 through wood 62 as a spacer. Washers 66 and 68 are welded to the upper and lower ends of the gel 64, and a rubber plate 70 is interposed between the upper washer 66 and the beam 56. Further, a steel plate 72 and asbestos 74 are sandwiched between the wood 62 and the upper plate 54. The lower washer 68 is liquid-tightly fixed to the bolt 64, and the outer periphery of the washer 68 and the lower surface of the upper plate 54 are liquid-tightly fixed. Furthermore, wood 62. The hole through which the bolt 64 of the joist member 58 is passed is larger than the diameter of the bolt 64, allowing slight relative movement between the beam 56 and the upper plate 54. The imaginary line portion of the bolt 64 in FIG.
8 and the bolt 64 are fixed, and then the bolt 64 is cut.

As described above, a heat insulating material such as glass wool or foamed polyurethane is filled between the inner tank 30, which is fixed so as to be slightly movable relative to the hull 10, and the hull 10, to improve the heat insulation. There is.

As shown in No. 9.10.1lff, this inner tank 30 is formed with a band-shaped wavy bent portion 76 that is substantially perpendicular to the longitudinal direction of the hull. This bent portion 76 absorbs stress by expanding and contracting when the hull is distorted during navigation and stress is applied to the inner tank 30, and excessive stress is concentrated on the inner tank 30. It has the effect of preventing the inner tank 30 from being damaged and protecting the inner tank 30. Note that if the removable slatted board 44a is arranged so as to face the bent portion 76 of the bottom plate 32.

Fuel oil that accumulates in this bent portion 76 can also be easily cleaned.

The inner tank 30 is provided with a hatch 78 that penetrates the deck 18 and opens upward, and the hatch 78 can be opened and closed by a slidable cover plate 80.

A cooling air descending passage 82 is formed on one of the front and rear walls of the inner tank 30, the upper end of which passes through the deck 18 and opens upward, and the lower end of which communicates with the cooling air passage 46 below the grating board 44. Figures 9-11). This cooling air descending passage 8 of the inner tank 3°
2 and the other portions pass through the deck 18 and open upward, and cover plates 84 and 86 are attached to both of these openings so as to be openable and closable. Further, a cooling device 88 is disposed between both cover plates 84 and 86, and two
Two rooms 90a and 90b are defined (10th
li). Both lid plates 84, 86 are provided with ventilation ports 92, 94 that can be opened and closed, and ventilation ports 96 that can be opened and closed are provided in other positions of the inner tank 3o (FIG. 11). ~ In this embodiment configured as above, the inner tank 3
When using 0 as a freezing tank, each ventilation port 92, 94
．． 96 and close each lid plate 84. -Open 86 and cooling device 88
All you have to do is drive. At this time, the cooling air flows through the room 90a, the cooling air descending path 82. Passing through the cooling air passage 46, the slatted board 44
It flows into the tank 30 within the gap. And luggage 98
(Figure 10)? After cooling, the cooling air enters room 90b.

It is cooled again by the cooling device 88 and circulated.

When the inner tank 30 is used as an oil tank, the lid plate 84.
．． 86 and open the ventilation ports 92, 94, 96 to allow fuel oil to flow into the inner tank 30.

Further, when the inner tank 30 is to be used as a freezing tank thereafter, a cleaning device (not shown) that sprays high-pressure cleaning liquid is introduced into the inner tank 30 through the hatch 78 to clean the inside. At this time, if the slatted plate 44a is removed, the inside of the cooling air passage 46 can also be cleaned well.

In this embodiment, since the cooling device 88 is disposed on the deck 18 at an angle of 4°, the cargo loading space can be made larger than in the case where the cooling device 88 is housed in another position within the hull 10.

(Effect of the invention) In the present invention, as described below, the inner tank is made of steel plate.

Cooling air is sent into the inner tank from a cooling device installed outside the inner tank and circulated.

Since the tank is equipped with a vent that can be opened and closed, the tank can be used as a freezing tank or an oil tank by cleaning the inside of the tank, greatly improving the ship's efficiency. In addition, the inner tank is fixed within the hull via insulating joists to allow slight movement, so the load applied to the inner tank can be widely distributed not only to the inner tank but also to the hull.

A lightweight inner tank can withstand a sufficient load. In addition, the strain that occurs in the hull during navigation can be absorbed by a slight relative movement between the inner tank and the hull.
Excessive stress is not applied to the inner tank, and the inner tank can also be well protected.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ with a part omitted, and Fig. 3 is a side view of an embodiment of the present invention.
-m line sectional view, Figure 4 is the IV-IV line sectional view, Figure 5
The figure is an enlarged view of the V part, Figure 6 is a cross-sectional view taken along the line ■-■ in Figure 1, Figure 7 is a detailed view of the ■ part in Figure 6, and Figure 8 is a cross-sectional view taken along the line ■-■. FIG. 9 is a partially sectional perspective view of the inner tank, FIG. 10 is a diagram showing the inner tank in use as a freezing tank, and FIG. 11 is a diagram showing the inner tank in use as an oil tank. 10...hull, 22.24...frame. 30...Inner tank, 36,50.58...Insulating joist member. 44...Slatted board, 46...Cooling air passage. 76...Bending portion, 88...Cooling device. 92.94.96...Ventilation. Patent applicant Daisorimaru Kaiun Co., Ltd. Agent Patent attorney Yama 1) Yu Moon

Claims (5)

[Claims] (1) A steel plate inner tank fixed to a frame on the inner surface of the steel plate hull through an insulating joist member to allow slight movement; and a heat insulating material filled between the inner tank and the hull; A cooling air passage provided at the bottom of the inner tank and a cooling device provided outside the inner tank are provided, and cooling air sent from the cooling device is sent to the cooling air passage. A refrigerated ship that can also be used as an oil tank, characterized in that the inner tank is provided with an openable and closable ventilation port that communicates with the outside air. (2) The inner tank is formed with a wavy bent portion along a plane substantially orthogonal to the longitudinal direction of the hull, and this bent portion can absorb stress applied to the inner tank. Refrigerated boat that can also be used as an oil boat. (3) A refrigerated ship that can also be used as an oil tank according to claim 1 or 2, wherein the cooling air passage is formed by gratings, and at least a part of the plate forming the grates is removable. (4) The refrigerated ship that can also be used as an oil tank as claimed in claim 3, wherein the removable plate of the slats is located above the wavy bent portion. (5) The reefer ship 0 which can also be used as an oil tank according to claim 1, wherein the cooling device is installed on the deck above the inner tank.