JP2543121Y2 - Slot Shape and Longe Penetration Structure in Oil-Watertight Bulkhead of Ship - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention is mainly applied to a longitudinal section of a ship hull, which is a longitudinal member, penetrating a bulkhead which is required to be oil-tight or watertight (hereinafter referred to as an oil-watertight bulkhead). The present invention relates to the shape and structure of an opened slot.

[0002]

2. Description of the Related Art FIG. 9 is a cross-sectional view (laterally symmetrical with respect to a hull center line) of an oil-watertight bulkhead of a ship. As structural members of the hull, there are an upper deck 1, a hull outer skin 2, a hull bottom skin 3, a longitudinal partition wall 4, and the like. Longitudes 5 vertically extending in the longitudinal direction of the hull are arranged at regular intervals. . In the horizontal direction, there are a horizontal partition (illustrated by an oil-water-tight partition 6), a transformer (not shown), and the like as illustrated.

FIG. 10 (a) shows a structure of a through-hole in a conventional general oil-watertight partition wall 6. As shown in FIG. This is referred to as a color plate type. For example, a substantially inverted L-shaped partition wall 6 is provided on the bottom plate 3 (the same applies to the upper deck and the side plate) so that the longe 5 can be easily inserted. Slot 7
A T-type long (which may be an L-type long on an upper deck or the like) 5 composed of a web 5A and a flange 5B is inserted through the slot 7 in the longitudinal direction of the hull, and its feet are welded onto the bottom outer panel 3. The slot opening is closed by a color plate 8, and the periphery thereof is welded to the partition wall 6 or the flange 5. Even when the partition wall is not the oil-water-tight partition wall 6, a similar color plate type penetration structure may be adopted from the viewpoint of securing strength.

[0004] Fig. 10 (b) shows a longitudinal penetration structure of a portion where oil-watertightness is not required, such as a non-oiltight wall or a transformer. This is disclosed in JP-A-52-4940 or JP-A-Hei.
In the slot structure disclosed in Japanese Patent Application Laid-Open No. 238789, where the face plate 5B portion of the longe 5 passes so as to easily insert the longe 5 in advance into the non-oil-tight partition 9 or the like, an oblong shape surrounding the long plate 5 is used. Large opening 10
In the web 5A, the opening 11 is slightly larger than the thickness of the web 5A. In this conventional example, since oil-water tightness is not required, there is no need to separately provide a color plate, and the opening 10 of the slot in the face plate 5B portion is not required.
There is no particular problem even if is large.

[0005]

[Problem to be Solved by the Invention] In the structure for penetrating the long section of the oil-watertight partition wall shown in FIG. In addition, since the entire periphery of the color plate needs to be welded, the number of welds increases, which requires enormous on-site man hours. In particular, because there is a color plate, it is not possible to perform an airtightness test for each part (for each block), so painting work must be delayed until the tank is completed and the entire airtightness test is completed, leaving the painting work for this part, Very inefficient.

FIG. 10B shows a longitudinal penetration structure in a partition wall or the like that does not require oil-water tightness. Even if a large slot is opened in the face plate portion, there is no need to close the color plate by welding, so that there is no need to close the collar plate. Although there is no problem, when this slot shape is adopted for the oil-watertight bulkhead targeted by the present invention, a color plate for closing the slot of the face plate portion for securing oil-watertightness is necessary as in the above-described conventional example. Become. Therefore, when this conventional example is applied as it is, the same problem as described above occurs.

[0007] One object of the present invention is to provide a slot shape which can eliminate the need for a color plate which has been conventionally required to secure oil-water tightness.
Another purpose is to perform a partial leak test in the block stage,
Accordingly, it is an object of the present invention to provide a through-hole structure in which the entire surface including the welded portion can be applied at the block stage.

[0008]

In order to achieve the above-mentioned object, a slot shape according to the present invention is a slot provided in an oil-watertight partition for inserting a long consisting of a web and a face plate. The shape of the shape is substantially similar to the shape of the longe by adding a gap to be inserted around the cross-sectional shape of the longe, and the gap formed around the longe is fillet-welded from both sides of the oil-watertight bulkhead. It is characterized in that it is set to a minute gap that can be closed by a.

In the above configuration, it is preferable that the minute gaps at both ends of the face plate and the lower face of the face plate of the longe are set to be larger than the minute gaps on both sides of the longitudinal web and the upper face of the face plate. Also, specifically,
A small gap of about 1.5 mm is formed on both sides of the long web, and about 2.5 mm on the lower face and both ends of the face plate.
And a slot having a small gap of about 1.5 mm on the upper surface.

[0010] Further, the longe penetrating portion structure according to the present invention includes:
A structure in which a long consisting of a web and a face plate penetrates an oil-tight partition, and a slot opened in the oil-tight partition for inserting the long is provided with a small gap in the cross-sectional shape of the long. It has a shape similar to that of the longe provided around it, and fills the minute gaps formed around the web and face plate of this longe with fillet welding from both sides of the partition wall, and between the welds on both sides in the weld cross section. Is characterized in that it still has a minute gap over substantially the entire circumference of the longe.

In this case, it is preferable to make the minute space formed over substantially the entire circumference of the longe continuous with the minute space formed between the outer plate or deck and the partition.

[0012]

The slot in the oil-water-tight partition wall has a small gap to allow a margin for insertion around the longe, so that a minute space can be formed from both sides of the partition wall without attaching an extra member such as a color plate. Oil-water tightness can be ensured only by filling the gap with fillet welding. Therefore, the number of welds decreases as the number of members decreases. Further, if the minute gaps between the both ends of the face plate of the longe and the lower surface of the face plate are set large, it becomes easy to insert the longe into the slot of the oil-tight partition.

This is effective particularly in the case of a T-type or L-type long which is formed by welding a web and a face plate, since the bending tends to be downward due to welding distortion.

By communicating the minute gap around the longe with the minute gap between the partition wall and the outer plate or deck, a partial airtight test of the block can be performed, and therefore the entire surface of the block including the welded portion can be painted. Can be done in the block stage.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a state in which a T-type long has been inserted into a slot formed in an oil-watertight partition wall erected on an outer panel. Such a T-type longe 5 is usually attached to the bottom shell 3 as shown in FIG. 4 and 5 are often attached to the deck 1, the ship-side outer plate 2, and the longitudinal partition 4.

Hereinafter, the slot shape and the structure of the through portion of the watertight bulkhead will be described with reference to a T-type longe in a ship bottom block as an example. The shape (the size of the opening) of the slot 7 at the portion where the longe 5 penetrates the oil-tight partition is substantially similar to that of the longe 5 by adding a gap to be inserted into the cross-sectional shape of the longe 5, and This insertion allowance, that is, the gaps a to g formed around the longe 5,
Instead of providing a color plate to ensure oil-water tightness as in the related art, the gap is set to a minute gap that can be closed by fillet welding performed from both sides of the partition wall 6. In particular,
1.5 times each on both sides (a, g) of web 5A of Longi 5
mm, 2.5 mm on the lower side (b, f) of the face plate,
The slot shape is such that minute gaps of 2.5 mm are formed on both end sides (c, e) of the face plate and 1.5 mm on the upper side (d) of the face plate. In other words, a slot 7 having a shape substantially similar to the cross-sectional shape at the position of the partition wall of the longe is formed in the partition wall 6.

As described above, the minute gaps a to f are formed around the long 5 composed of the web 5A and the face plate 5B (almost the entire circumference of the long). These minute gaps a to g may be uniform (for example, all 1.5 mm), but while securing the minimum gap as the insertion allowance,
It is preferable to set the gap as small as possible from the viewpoint that the gap can be easily closed by welding.

As described above, the gaps c and e at both ends of the face plate 5B are set to 2.5 mm, and the gaps are set to be longer than the other ones because a long line is fixed in one block at intervals (about 6 m).
Because it is necessary to insert three slots aligned in a line (usually, there are a total of three partitions and transformer slots for one block, and it is necessary to insert a longe into these three slots at the same time). This is for facilitating insertion. The reason why the gaps b and f on the lower surface of the face plate 5B were set as large as 2.5 mm was that of the long web 5A.
The reason is that the face plate 5B is likely to bend downward due to the welding of the face plate 5B and the face plate 5B, so that even if there is such welding distortion, it does not hinder the insertion of the longe.

In the case of the built-up type L-type longe shown in FIG. 4, the slots may be formed in the same manner in the case of the L-type longe of the die shown in FIG. The gap on the lower surface of the face plate 5B of the longitudinal of FIG. 4 needs to be the same as that of the above-described embodiment. However, in the case of the L-shaped longitudinal of the steel shown in FIG. 5, there is no welding between the web 5A and the face plate 5B. Therefore, the gap on the lower surface of the face plate 5B may be small.

Next, as shown in FIG. 2, the small gaps a to g around the T-shaped longe 5 are filled with welds (welded portions) 12 from both sides of the bulkhead 6 by fillet welding, and at the same time, the longe 5 is sealed with an oil-watertight bulkhead. 6 to secure oil-water tightness. In this case, the partition 6
In the case of ordinary fillet welding without a groove on the side, as shown in FIG. 3A, which is a cross section taken along the line AA in FIG. ~ G remains.

FIG. 3 (b) is a plan view on the outer plate surface showing a welding state of the foot of the longe 5 of FIG. A triangular cut portion F (FIG. 1) is provided at the lower end corner of the partition wall 6, and the weld portion 12 b penetrates the welding nozzle across the partition wall 6 in the arrow X direction by using the cut portion F. In this way, it is connected to the already welded portion 12a. Such a welded portion 12b can prevent test air, which will be described later, from escaping in the direction of the feet of the longe 5. It should be noted that the welding of the corners is performed in the Y direction,
b, and the above-mentioned minute spaces a to g are completely closed by further welding the rising portion from the foot of the longe.

On the other hand, FIG. 3 is a sectional view taken along the line BB in FIG.
As shown in (c), between the partition wall 6 and the outer plate 3, although both are metal-touched, normal fillet is used unless a groove is welded from both sides of the partition wall 6 and completely filled. In welding,
An extremely small gap h exists between the two. The inevitably present minute gap h communicates with the minute gaps a to g around the longe formed intentionally. In other words, since the weld bead continues without interruption with the partition wall 6 interposed therebetween, the very small space h between the partition wall 6 and the outer plate 3 (or the deck) is formed from the long web 5A to the small space a surrounding the face plate 5B. To g, and further to an extremely small gap between the partition wall on the other side and the outer plate with the longe 5 interposed therebetween.

When the outer shell 3 or the deck is joined after the longes 5 are inserted one after another and welded to the bulkhead 6, a hull block as shown in FIG. 6 is completed. If they are continuous, it is possible to perform an airtight test at a block stage (for each block).

In the hull block shown in FIG. 6, when the left side is the upstream side, the minute gaps are continuous in the direction of the arrow. By utilizing the continuity of the minute gaps, it becomes possible to perform a partial hermeticity test, which is a stage preceding the hermeticity test of the entire section. In addition, the whole airtightness test of whether or not the oiltightness of the tank completed by the oiltight partition is ensured in the dock. The following is the outline of the partial leak test at the block stage.

First, the cutouts 13 are provided on both sides (FIG. 6) of the area where the airtight test of the block is to be performed.
FIG. 7 shows details of the edge cut 13, and FIG.
(b) As shown in the front view, a semicircular groove is provided in a front view, and the groove is filled with welding. As a result, the very small gap h between the partition 6 and the outer plate 3 is completely closed. Next, as shown in FIG. 6, near the edge 13, a test compressed air injection portion 14 and a discharge portion 15 are provided on the upstream side and the downstream side, respectively. As shown in FIG. 8, one side of the partition wall 6 on the upstream side and the nut 1
6 is welded all around, and an air pipe 17 is
Is attached via the joint 18. A pressure gauge 19 is attached to the threaded portion of the nut provided on the other side, which is the downstream side.

As shown by the arrow in FIG. 6, when the compressed air is supplied from the air pipe on the left (upstream) side, the compressed air passes through the minute gap h between the partition wall 6 and the outer plate 3 and the long web 5A.
The partition 6 and the small gap between the face plate 5B and the partition 6, and then the gap between the web 5A on the other side and the partition 6 to lower the gap between the outer plate 3 and the partition 6 again. Flows into the very small gap. Similarly, the compressed air flows through the gaps around the longe one after another to reach the pressure gauge 19 provided on the most downstream side. In such a partial hermeticity test, if the value of the pressure gauge 19 on the downstream side is read, it is possible to detect the presence or absence of a pressure drop from the supply pressure, and to know the presence of a welding defect that impairs oil-water tightness. it can. Normally, soapy water is applied to the welded portion 12 (FIGS. 2 and 8), and if there is air leakage, the soapy water swells like a soap bubble, so that it is possible to find a defect at that portion. I have.

As described above, since the partial airtightness test can be performed in the block stage, it is possible to paint the entire block including the welded portion of the partition wall and the longe after the partial airtightness test in the block stage. Completed an oil / watertight compartment in the dock as in the past, conducted an overall airtight test, and then eliminated the situation of painting the bulkheads and welded welds that were left unpainted in a dock with poor environmental conditions Will be done.

[0028]

[Effect of the invention] According to the invention according to claims 1 to 3,
Even in the case of a partition wall requiring oil-water tightness, such as an oil-water-tight (including oil-tight) partition wall, a slit-type slot having a shape substantially similar to the longitudinal section is opened in the partition wall. By closing the gaps by welding, oil-water tightness is sufficiently ensured, so there is no need for a conventional color plate, and as a result the number of members is reduced and the number of welds is reduced, resulting in a large number of on-site man-hours. A reduction effect is obtained.

According to the invention according to claim 4 or 5,
Since the minute space is continuous without intervening the weld bead with the partition wall interposed therebetween, the airtightness test (partial airtightness test) at the block stage of a plurality of longe penetration portions can be performed efficiently. As a result, the entire painting can be performed in the block stage after the partial hermetic test without having to wait for the entire hermetic test after the tank is completed, thereby eliminating the painting work in a dock with a bad working environment. Can be shortened.

[Brief description of the drawings]

FIG. 1 is a front view of a slit type slot shape according to the present invention.

FIG. 2 is a front view of the longitudinal penetration structure according to the present invention.

3 (a) is a cross-sectional view taken along the line AA in FIG. 2, (b) is a plan view on the outer plate surface of the foot portion of the longe in FIG. 2, and (c) is a line BB in FIG. It is sectional drawing.

FIG. 4 is a view showing a structure of a through-hole for a built-up type L-type longe.

FIG. 5 is a structural view of a longe penetration portion in the case of an L-shaped longe of a mold steel.

FIG. 6 is a front view showing a procedure of a partial airtight test of the hull block.

FIGS. 7 (a) and 7 (b) are a side sectional view and a front view of an edge cut.

FIG. 8 is a side view showing a state in which an air tube for an airtight test is attached to an oil-watertight partition wall.

FIG. 9 is a cross-sectional view showing the hull structure at the position of the oil-watertight bulkhead.

10A is a structural view of a color plate type longe penetration part in a conventional oil-watertight partition wall, and FIG. 10B is a structural view of a longe penetration part in a conventional non-watertight partition wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Deck 2 ... Ship side outer plate 3 ... Ship bottom outer plate 4 ... Longitudinal partition wall 5 ... Longitudinal 5A ... Web 5B ... Face plate 6 ... Oil-tight partition wall 7 ... Slot 12 ... Welded part 13 ... Edge cut a-g ... Micro gap h … Very small gap F… Triangular cut part

Claims (5)

(57) [Scope of request for utility model registration] 1. A slot provided in an oil-watertight partition for inserting a long consisting of a web and a face plate, the slot being formed by adding a gap around the cross-sectional shape of the long to a cross-section. It is characterized in that it is formed in a shape substantially similar to the longe, and that the gap formed around the longe is set to a minute gap that can be closed by fillet welding from both sides of the oil-tight wall. Slot shape of oil-tight bulkhead of ship. 2. A slot shape in an oil-watertight bulkhead of a ship according to claim 1, wherein the minute gaps at both ends of the face plate and the bottom face of the face plate are set larger than the minute gaps at both sides of the web of the longe and the top face of the face plate. . 3. 1.5 meters each on both sides of the web of longi
3. An oil-watertight bulkhead according to claim 1, wherein a small gap of about 2.5 mm is formed, and a small gap of about 2.5 mm is formed on the lower surface and both ends of the face plate and a small gap of about 1.5 mm is formed on the upper surface. Slot shape. 4. A structure in which a long consisting of a web and a face plate penetrates an oil-tight partition, and a slot opened in the oil-tight partition for inserting the long is formed in a cross-sectional shape of the long. A small gap is formed in a shape substantially similar to that of the longe provided around the longe, and the small gap formed around the web and face plate of the longe is filled with fillet welding from both sides of the partition wall, while the weld cross section is formed. A longe penetration structure in an oil-watertight bulkhead of a ship, characterized in that a minute gap is still provided between substantially both sides of the welded portion. 5. The oil and water of a ship according to claim 4, wherein the minute space formed over substantially the entire circumference of the longe is made continuous with the minute space formed between the outer plate or the deck and the bulkhead. Longitudinal penetration structure in dense partition.