KR20220039538A - structure of bottom of ship having durability with HDPE - Google Patents

Abstract

The present invention relates to a structure of a bottom of a ship having the durability of a high-density polyethylene ship, wherein a ship can be manufactured using high-density polyethylene to have the shape of a bottom of a ship capable of preventing flooding during a collision of the bottom of a ship. The structure of the bottom of a ship having the durability of a high-density polyethylene ship according to one embodiment of the present invention comprises: a deck part; a left side wall body and a right side wall body formed at ends of the right and left sides of the deck part; the bottom of a high-density polyethylene ship body formed in the shape of V and having a plurality of buoyancy spaces formed therein by a plurality of bulkhead members; and a plate-shaped keel constituting the bottom surface of the ship body, formed in the forward and rearward direction of the ship body at the center in a lateral direction where the left lower plate and right lower plate, which are formed in lateral symmetry, are in contact with each other, and distributing a load resulting from a collision of the bottom of a ship in the longitudinal direction of the ship body without transmitting the same directly to the ship body.

Description

The structure of the bottom of ship having durability with HDPE

This specification relates to a high-density polyethylene vessel, and more specifically, when a vessel is manufactured using high-density polyethylene (HDPE), the bottom structure is shaped to match the characteristics of the high-density polyethylene material. is about

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and inclusion in this section is not an admission that it is prior art.

In general, most of the small ships are made of fiber-reinforced plastic (FRP), and fiber-reinforced plastic ships are not recyclable, and since the material has a high carbon footprint, it is an environmentally friendly material, replacing aluminum in the early 2000s. It was intended to be developed with high quality, but it was not widely commercialized due to the high price, complicated maintenance, limited hull life, and the limitation of recycling to scrap form due to metal deterioration.

In consideration of this, research and development are underway to build a ship using fiber-reinforced plastic (FRP), which cannot be recycled, or polyethylene, which can overcome the disadvantages of aluminum fishing boats, which have weaknesses in ship price and maintenance.

HDPE (high-density polyethylene, hereinafter 'polyethylene') is a thermoplastic general-purpose resin. Polyethylene is largely divided into two types: low-density polyethylene (LDPE) having a low crystallinity and high-density polyethylene (HDPE) having a high crystallinity according to pressure conditions during manufacture.

Polyethylene has excellent mechanical performance, moisture resistance, moisture resistance, cold resistance, chemical resistance, electrical insulation, excellent moldability, and low manufacturing cost. there is.

In the case of Korea, the Korea Maritime Transportation Safety Authority is studying to establish safety regulations related to the manufacture of polyethylene ships in the future.

Here, in the case of a polyethylene-made ship, it is known that the hull material can be recycled when the ship is closed, the ship price is lower than that of an aluminum-made ship, and the risk of hull damage due to a collision with a reef or other ship is remarkably low.

However, in the case of a polyethylene ship, there is a problem in that it is difficult to construct a watertight bulkhead between the bow and the stern because the bonding technology between the members is different from the existing composite materials such as aluminum or fiber-reinforced plastic (FRP).

In other words, unlike steel and composite materials that are easy to join and overlap by cutting the plates into small units and connecting them by welding, ships using high-density polyethylene have a high coefficient of heat shrinkage, so plates must be used in large sizes. There is a problem in that it is difficult to construct a watertight bulkhead with a material without a bonding method.

In addition, the high-density polyethylene welding machine has a larger size than a general welding machine, so that a worker enters a narrow space under the deck and an area where upper-view welding is impossible may occur during operation.

For the keel of a ship, a square keel using square iron bars or a pipe, angle, beam, or flat keel using a flat plate using section steel is used.

These keels are provided along the longitudinal direction in the center of the lower plate of the ship to support the entire frame of the ship. After abutting the side ends of the lower plate of the ship on both sides of the keel, welding is applied along the longitudinal direction to join them.

In this conventional keel, it was not easy to weld the side ends of the lower plate to both sides of the aluminum keel, but welding the lower plate to both sides of the keel was complicated. It is often not possible to weld on both sides of the keel properly, and such poor welding results in a ship safety accident.

The registration of a ship's structure and a ship is announced in Republic of Korea Patent Publication No. 10-2114753.

The embodiment of the present specification is a high-density polyethylene vessel made of a plate made of a high-density polyethylene material to generate resistance at the bottom of the hull in the opposite direction to the current and wind to ensure straightness, and the durability of the high-density polyethylene vessel It is related to the bottom structure with

An embodiment of the present specification relates to a ship-bottom structure having durability of a high-density polyethylene vessel to have a bottom shape that prevents flooding by an internal member of a keel in case of a bottom collision of a ship made of high-density polyethylene.

Embodiments of the present specification are related to a bottom structure having durability of a high-density polyethylene vessel, so that the strength and safety of the portion with the highest risk of damage in the event of a bottom collision of the vessel can be improved through the structure to be extruded.

The embodiment of the present specification is to locally double form the edge or bottom surface of the car-shape from the V-shaped linear (so-called 'chain line') to prevent flooding due to damage to the hull edge, and It is related to the bottom structure with the durability of the high-density polyethylene vessel, which reduces structural defects due to welding by minimizing it, and prevents aesthetic damage caused by welding marks on the edges of the hull, etc.

According to an embodiment of the present specification to achieve the above and other purposes of the present specification,

The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,

Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear directions of the hull in the center of the left and right direction in contact, the load due to the bottom collision of the ship is not directly transmitted to the hull and the hull It provides a bottom structure with durability of a high-density polyethylene vessel, characterized in that it has a keel in the form of a plate for inducing it to be dispersed in the longitudinal direction.

According to another embodiment of the present specification to achieve the above and other purposes of the present specification,

The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,

Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear direction of the hull at the center of the left and right direction in contact, and the left lower plate and the right lower plate are formed in the front and rear direction due to the collision of the ship's bottom It provides a bottom structure having durability of a high-density polyethylene vessel, characterized in that it has a keel that is extruded into a pipe shape or polygonal shape to prevent submergence in case of breakage.

According to another embodiment of the present specification to achieve the above and other purposes of the present specification,

The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,

Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear directions of the hull in the center of the left and right direction in contact, the load due to the bottom collision of the ship is not directly transmitted to the hull and the hull a keel extruded to induce dispersion in the longitudinal direction;

The lower end of any one of the left and right walls and the end of any one of the left and right lower plates adjacent thereto are partially overlapped and jointly connected by welding, and a chain line is extrusion-molded; It provides a bottom structure.

According to another embodiment of the present specification to achieve the above and other purposes of the present specification,

The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,

Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear directions of the hull in the center of the left and right direction in contact, the load due to the bottom collision of the ship is not directly transmitted to the hull and the hull a keel extruded to induce dispersion in the longitudinal direction;

a first chain line in which the lower end of the left wall and the outer end of the lower left plate are jointed by welding and extruded;

The lower end of the right wall and the outer end of the lower right plate are jointed by welding, and a second chain line is extrusion-molded.

The ship bottom structure having the durability of the high-density polyethylene vessel according to the embodiment of the present specification having the above-described configuration has the following advantages.

In the case of a bottom collision of a ship made of high-density polyethylene, the load due to bottom collision is not transmitted directly to the hull but is distributed in the longitudinal direction of the hull, so it is possible to prevent flooding due to damage to the hull edge.

In addition, it has practicality and reliability by improving the strength and safety of the part with the highest risk of damage when the ship's bottom collides through the extrusion-molded structure.

In addition, by locally double forming the edge or bottom surface of the chae-shaped from the V-shaped linear (so-called 'chain line'), flooding caused by damage to the hull edge is prevented, and the welding area is minimized to prevent damage caused by welding. It is possible to reduce structural defects and prevent aesthetic damage caused by welding marks on the edges of the hull.

1 (a, b) is a schematic perspective view and a front view of a ship bottom structure having durability of a high-density polyethylene vessel according to a preferred embodiment of the present specification;
Figure 2 is a modified example of the high-density polyethylene vessel shown in Figure 1 (a),
Figure 3 is another modified example of the high-density polyethylene vessel shown in Figure 1 (a),
4 is a view showing another modified example of the high-density polyethylene vessel shown in Fig. 1 (a);
5 is a view showing another modified example of the high-density polyethylene vessel shown in Fig. 1 (a).

Hereinafter, a ship bottom structure having durability of a high-density polyethylene vessel according to a preferred embodiment of the present specification will be described in detail with reference to the accompanying drawings.

Referring to Figure 1 (a, b), the ship bottom structure having the durability of the high-density polyethylene vessel according to an embodiment of the present specification is

The deck part 90, the left wall 100 and the right wall 110 formed at the left and right ends of the deck part 90, and a plurality of bulkhead members 120 to be movable (navigation) in a floating state along the water surface ) of the hull 20 made of high-density polyethylene (HDPE) material with a plurality of buoyancy spaces 10 formed therein by a V-shape (the left wall 100 and the right wall 110 are formed in the upper and lower halves) formed with,

It forms the bottom surface of the hull 20, and is formed in the front-rear direction of the hull 20 at the center in the left-right direction in which the left and right lower plates 30 and 40 formed in a left-right symmetrical shape are in contact (that is, along the center line of the hull 20) Formed from the bow to the stern under the ship), a plate-shaped keel (so-called keel) for inducing that the load caused by the collision of the ship's bottom is quickly distributed in the longitudinal direction of the hull 20 without being directly transmitted to the hull 20 It is characterized in that it is provided with a 'keel' (referring to) (50).

For this reason, the load caused by the impact when the ship bottom collides during the voyage of the ship is applied to the hull 20 by the keel 50 in the form of a plate formed in the longitudinal direction (front and rear direction of the hull 20) in the center of the bottom surface of the hull 20. It is possible to minimize the damage of the hull 20 by quickly dispersing in the longitudinal direction (front and rear direction) of the.

When the above-mentioned keel 50 is formed in the form of a plate material in the vertical direction, resistance occurs in the lower part of the hull in the opposite direction to the current and wind when the ship is operating, so that the resistance is low and the straightness is high when moving, and the driving force is improved. The process can be shortened and the manufacturing cost can be reduced.

According to a more preferred embodiment, the above-described left and right lower plates (30, 40) are formed by double addition to the corners or are formed to be locally doubled on the bottom surface, due to damage to the edge or the bottom surface of the hull (20) It is characterized in that it is provided with a chain line (chain line) (60) (formed to help the floating (浮上) during the voyage of the hull (20)) for preventing flooding.

For this reason, as the above-described chain line 60 is locally welded to the corners or bottom surfaces of the left and right lower plates 30 and 40 by welding, the ship bottom collides with a sandbar or a reef during operation of the hull 20, and external impacts occur. When applied, since the chain line 60 absorbs and cancels, the edges or bottom surfaces of the left and right lower plates 30 and 40 are damaged to prevent the hull 20 from being submerged.

At this time, since the above-described hull 20 is molded from a high-density polyethylene material, the chain line 60 is welded only from the outside of the hull 20, thereby improving the workability of drying the hull. Compared to this, in the ship bottom of a conventional ship, when the chain line 60 is added to the bottom surface of the lower plates 30 and 40 and welded, both the inside and the outside are welded, so the work efficiency of manufacturing the bottom of the ship is lowered.

The shape of the above-described chain line 60 is, for example, an edge shape, and is not limited to a specific shape, and may be modified in various shapes according to the size of the ship, of course.

2 to 3, the ship bottom structure having the durability of the high-density polyethylene vessel according to another embodiment of the present specification is

The deck part 90, the left wall 100 and the right wall 110 formed at the left and right ends of the deck part 90, and a plurality of bulkhead members 120 to be movable (navigation) in a floating state along the water surface ) of the hull 20 made of high-density polyethylene material (HDPE) in which a plurality of buoyancy spaces 10 are formed by the ), but

Forming the bottom surface of the hull 20, the hull 20 is formed in the front-rear direction in the center in the left-right direction in which the left and right lower plates 30 and 40 formed in a symmetrical form come into contact with each other (that is, along the center line of the hull 20) Formed from the bow to the stern below), a pipe shape (refer to FIG. 2) or a polygonal shape (refer to FIG. 3) to prevent flooding when the lower plates 30 and 40 are damaged by an external impact caused by the collision of the ship's bottom ), characterized in that it is provided with a keel (referring to a so-called 'keel') 50 that is extruded.

The shape of the aforementioned kiel 50 is, for example, a pipe or polygonal shape, and it is of course not limited to a specific shape and may be modified in various shapes according to the size of the ship.

When the above-described keel 50 is formed in a polygonal shape, it has an advantage in that the driving force is improved due to the high straightness during the operation of the ship. Since the above-described technology for extruding the kiel 50 by means of a high-density polyethylene (HDPE) material is commonly used in the art, a detailed description of their configuration and manufacturing process will be omitted.

The aforementioned kill 50 is

an inner member 70 connecting the inner ends of the lower plates 30 and 40 to be spaced apart from the upper surface;

The inner member 70 is integrally formed to extend in the vertical direction, and the outer member 80 connects the inner ends of the lower plates 30 and 40 to be spaced apart from the bottom surface;

Even when the outer member 80 is damaged by an external impact, it is characterized in that the connection state joined by the welding of the lower plates 30 and 40 by the inner member 70 can be maintained.

For this reason, when the outer member 80 is damaged by an impact applied from the outside while the ship bottom collides with a sandbar or a reef during the operation of the hull 20 described above, the left and right lower plates 30, 40 by the inner member 70 connection can be maintained.

That is, even when the above-described outer member 80 is damaged, it is possible to maintain the welded bonding state of the left lower plate 30 , the inner member 70 and the right lower plate 40 . Due to this, even when the outer member 80 is damaged, it is possible to prevent flooding into the hull 20 through the left and right lower plates 30 and 40 .

The ship molded from the above-mentioned high-density polyethylene (HDPE) material has a specific gravity of 930-970 kg/m3 of high-density polyethylene, which is lighter than water and is not submerged. By maintaining the buoyancy that does not occur, it is possible to improve safety compared to conventional aluminum ships.

4, the ship bottom structure having the durability of the high-density polyethylene vessel according to another embodiment of the present specification is

The deck part 90, the left wall 100 and the right wall 110 formed at the left and right ends of the deck part 90, and a plurality of bulkhead members 120 to be movable (navigation) in a floating state along the water surface ), the ship bottom of the hull 20 made of high-density polyethylene material, in which a plurality of buoyancy spaces 10 are formed therein, is formed in a V-shape (the left wall 100 and the right wall 110 are formed in the upper and lower narrow shapes). ,

Forming the bottom surface of the hull 20, the hull 20 is formed in the front-rear direction at the center of the left-right direction in which the left lower plate 30 and the right lower plate 40, which are formed symmetrically, contact, are caused by the ship's bottom collision a keel (also referred to as a keel) extruded to induce a load to be rapidly distributed in the longitudinal direction of the hull 20 without being transmitted directly to the hull 20;

The lower end of any one of the left and right walls 100 and 110 (as an example, referring to the right wall 110) and any one of the left and right lower plates 30 and 40 adjacent thereto (as an example, referring to the right lower plate 40) It is characterized in that it comprises a; joint-connected by welding, overlapping the ends of the chain line (60) to be extruded.

According to a more preferred embodiment, the flange portion 130 is fixed by welding at a right angle to the upper end of the one side bulkhead member 120 described above, and an arbitrary position of the deck portion 90 is cut in the forward and backward direction of the hull, but the flange portion 130 . After coupling the extended portion 140 protruding to the cut portion between the cut portions, the joint member 150 that is extruded in the shape of an L is connected to the cut portion seated on the upper surface of the flange portion 130 by welding. characterized.

The aforementioned kill 50 is

Welding and fixing the supporting plate 160 to the inner end of the left lower plate 30 in the vertical direction,

The flange portion 170 of the keel 50 is welded and fixed in close contact with the supporting plate 160, and the extension portion 180 extending upwardly from the flange portion 170 at the inner end of the lower right plate 40 overlaps a part. It is fixed by welding, and the cross-section is characterized in that it is extrusion-molded in a L-shape.

Although not shown in the drawing, the aforementioned kiel 50, chain line 60, and joint member 150 are extruded from a high-density polyethylene (HDPE) material, but the kiel 50, chain line 60 and joint member 150 are extruded. ) of the hull 20 by extrusion welding at an arbitrary position is commonly used in the technical field to which this specification belongs, so detailed descriptions of their configuration and manufacturing process will be omitted.

5, the ship bottom structure having the durability of the high-density polyethylene vessel according to another embodiment of the present specification is

The deck part 90, the left and right walls formed at the left and right ends of the deck part 90, and a plurality of partition wall members 120 to be movable (navigation) in a floating state along the water surface. The ship bottom of the hull 20 made of high-density polyethylene in which the buoyancy space 10 of

Forming the bottom surface of the hull 20, the hull 20 is formed in the front-rear direction at the center of the left-right direction in which the left lower plate 30 and the right lower plate 40, which are formed symmetrically, contact, are caused by the ship's bottom collision a keel 50 that is extruded to induce a load to be rapidly distributed in the longitudinal direction of the hull 20 without being transmitted directly to the hull 20;

The lower end of the left wall 100 and the outer end of the lower left plate 30 are jointed by welding, and the first chain line 170 is extrusion-molded;

The lower end of the right wall 110 and the outer end of the right lower plate 40 are jointed by welding, and the second chain line 180 is extrusion-molded; characterized in that it includes.

According to a more preferred embodiment, a first extension 200 having a coupling groove 190 is formed on the left side of the above-described keel 50, and a second extension portion ( 210), the inner end of the lower left plate 30 is coupled to the coupling groove 190 and jointly connected by welding at the opening, and one end of the right lower plate 40 is seated on the seating surface 220 to be welded. connected by a joint,

One end of the first chain line 170 is coupled to the lower end of the left wall 100, and a coupling groove 190 for joint connection by welding at the opening is formed, and the other end of the first chain line 170 is the lower left plate ( 30) is coupled to the outer end and a coupling groove 190 that is jointly connected by welding in the opening is formed,

One end of the second chain line 180 is seated on the seating surface of the right wall 110 and jointly connected by welding, and the other end of the second chain line 180 has the outer end of the lower right plate 40 on the seating surface ( 220) and is characterized in that it is jointly connected by welding.

The above-described second chain line 180 is

It is characterized in that it further comprises a; horizontal support bar 230 extending over the inner surface of the second chain line 180 and having the outer end of the deck part 90 seated and partially overlapped and fixed by welding.

The first flange 240 is welded and fixed to an arbitrary position on the upper surface of the left lower plate 30 as described above, and the first coupling groove 260 of the extension part 250 protruding from the upper surface of the first flange 240 has a first first coupling groove 260 . A first lower joint member 270 in the form of an “V” that is welded and fixed in the opening of the first coupling groove 260 and is extrusion-molded;

The second flange 280 is fixed by welding at an arbitrary position on the bottom surface of the deck part 90, and the protruding piece 290 protruding from the upper surface of the second flange 280 is cut to the deck part 90 in the forward and backward direction of the hull. It is coupled to the cut part and fixed by welding, and the upper end of the first partition wall member 120a is coupled to the second coupling groove 300 of the extension part 290 protruding from the bottom surface of the second flange 280, but the second coupling groove (300) is fixed by welding in the opening, the first upper joint member 310 is extrusion-molded; characterized in that compared.

The third flange 320 is fixed by welding to an arbitrary position on the upper surface of the right lower plate 40, and the third flange 320 is formed on one side of the extension part 330 protruding from the upper surface of the second bulkhead member 120b. A second lower joint member 340 that is partially overlapped and fixed by welding, and is extrusion-molded;

The fourth flange 350 is fixed by welding at an arbitrary position on the bottom surface of the deck portion 90, and the protruding piece 360 protruding from the upper surface of the fourth flange 350 is cut to the deck portion 90 in the front-rear direction of the hull It is coupled to the cut part and fixed by welding, and the upper end of the second bulkhead member 120b partially overlaps with one side of the extension part 360 protruding from the bottom surface of the fourth flange 350 and is welded and fixed, and the second extrusion molded The upper joint member 370; characterized in that it further comprises.

Although not shown in the drawings, the aforementioned kiel 50, the first chain line 170, the first lower joint member 170, the first upper joint member 310, the second lower joint member 340, and the second The upper joint member 370 is extruded from a high-density polyethylene (HDPE) material, but the keel 50, the first chain line 170, the first lower joint member 170, the first upper joint member 310, the second Since the description of jointly connecting the lower joint member 340 and the second upper joint member 370 to any position of the hull 20 by extrusion welding is commonly used in the technical field to which this specification belongs, these Detailed description of the configuration and manufacturing process of the will be omitted.

Although not shown in the drawing, a vessel in which a hull 20 made of high-density polyethylene (HDPE) in which a plurality of buoyancy spaces 10 are formed in a V-shape is formed so as to be able to move (navigate) in a floating state along the water surface. Since the manufacturing process is commonly used in the technical field to which this specification belongs, a detailed description of the manufacturing process thereof will be omitted.

Here, although the foregoing specification has been described with reference to preferred embodiments, those skilled in the art can variously modify and modify the present specification within the scope without departing from the spirit and scope of the present specification as set forth in the following claims. You will understand that you can change it.

10; buoyancy space
20; hull
30, 40; lower plate
50; kill
60; chain line
70; internal member
80; external member
90; deck
100; left wall
110; right wall
120; bulkhead member
130; flange part
140; extension
150; joint member
160; support board
170; 1st chain line
180; 2nd chain line
190; mating groove
200; first extension
210; 2nd extension
220; seating surface
230; horizontal support bar
240; first flange
250; extension
260; first coupling groove
270; 1st lower joint member
280; 2nd flange
290; extension
300; mating groove
310; 1st upper joint member
320; 3rd flange
330; extension
340; 2nd lower joint member
350; 4th flange
360; extension
370; 2nd upper joint member

Claims (12)

The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,
Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear directions of the hull in the center of the left and right direction in contact, the load due to the bottom collision of the ship is not directly transmitted to the hull and the hull A ship bottom structure having durability of a high-density polyethylene vessel, characterized in that it has a keel in the form of a plate for guiding it to be dispersed in the longitudinal direction. According to claim 1,
A chain line (chain line) for preventing inundation due to damage to the lower left and right lower plates or double formed locally on the bottom surface, and the edge of the hull or the bottom surface; A ship bottom structure having the durability of a high-density polyethylene ship, characterized in that it further comprises. The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,
Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear direction of the hull at the center of the left and right direction in contact, and the left lower plate and the right lower plate are formed in the front and rear direction due to the collision of the ship's bottom A ship bottom structure with durability of a high-density polyethylene vessel, characterized in that it has a keel that is extruded into a pipe shape or a polygonal shape to prevent flooding in case of breakage. 4. The method of claim 3,
the kill is
an inner member connecting the inner ends of the lower left and lower right plates to be spaced apart from the upper surface;
Including; an external member extending in the vertical direction integrally with the inner member and connecting the inner ends of the left lower plate and the right lower plate to be spaced apart from the bottom surface;
Even when the outer member is damaged by an external impact, it is possible to maintain the joined connection state of the left lower plate, the inner member, and the right lower plate by the inner member. The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,
Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear directions of the hull in the center of the left and right direction in contact, the load due to the bottom collision of the ship is not directly transmitted to the hull and the hull a keel extruded to induce dispersion in the longitudinal direction;
The lower end of any one of the left and right walls and the end of any one of the left and right lower plates adjacent thereto are partially overlapped and connected by welding, and the chain line is extrusion-molded; bottom structure. 6. The method of claim 5,
The flange part is fixed by welding at a right angle to the upper end of the bulkhead member on one side, and an arbitrary position of the deck part is cut in the front and rear direction of the hull, but after coupling the extension part protruding from the flange part between the cut parts, the cut part which is seated on the upper surface of the flange part A ship bottom structure with durability of a high-density polyethylene vessel, characterized in that it further comprises a joint member connected by welding and extruded in the shape of a letter V. 6. The method of claim 5,
the kill is
Welding and fixing the supporting plate in the vertical direction to the inner end of the left lower plate,
High-density polyethylene, characterized in that the flange portion of the kiel is welded and fixed in close contact with the supporting plate, and an extension portion extending upwardly to the flange portion on the inner end of the right lower plate is partially overlapped and fixed by welding, and is extrusion-molded in a L-shape. A ship's bottom structure with durability. The deck portion, the left and right walls formed at the left and right ends of the deck portion, and the ship bottom of the high-density polyethylene material in which a plurality of buoyancy spaces are formed inside by a plurality of bulkhead members are formed in a V-shape,
Forming the bottom surface of the hull, the left lower plate and the right lower plate formed in a symmetrical form are formed in the front and rear directions of the hull in the center of the left and right direction in contact, the load due to the bottom collision of the ship is not directly transmitted to the hull and the hull a keel extruded to induce dispersion in the longitudinal direction;
a first chain line in which the lower end of the left wall and the outer end of the lower left plate are jointed by welding and extruded;
A ship bottom structure having durability of a high-density polyethylene vessel, characterized in that it comprises a second chain line that is jointly connected to the lower end of the right wall and the outer end of the right lower plate by welding, and is extrusion-molded. 9. The method of claim 8,
A first extension portion having a coupling groove is formed on the left side of the kiel, and a second extension portion having a seating surface formed on an upper surface is formed on the right side of the kiel, and one end of the lower left plate is coupled to the coupling groove and in the opening of the coupling groove. It is jointly connected by welding, and one end of the lower right plate is seated on the seating surface and jointly connected by welding,
One end of the first chain line is coupled to the lower end of the left wall and a coupling groove for joint connection is formed in the opening, and the other end of the first chain line is coupled to the outer end of the lower left plate and welded in the opening. A coupling groove for joint connection is formed by
One end of the second chain line is seated on the seating surface of the right wall and connected by welding, and the other end of the second chain line is connected by welding with the outer end of the lower right plate seated on the seating surface. A ship bottom structure having the durability of a high-density polyethylene vessel, characterized in that. 9. The method of claim 8,
The second chain line is
A ship bottom structure with durability of a high-density polyethylene vessel, characterized in that it further comprises a; a horizontal support bar extending over the inner surface of the second chain line, the outer end of the deck part is seated and partially overlapped and fixed by welding. 9. The method of claim 8,
A first flange is fixed by welding at an arbitrary position on the upper surface of the lower left plate, and the lower end of the first bulkhead member is coupled to the first coupling groove of the extension part protruding from the upper surface of the first flange, but welding is fixed at the opening of the first coupling groove, , a first lower joint member in the form of an X that is extrusion-molded;
A second flange is fixed by welding at an arbitrary position on the bottom surface of the deck part, and a protruding piece protruding from the upper surface of the second flange is coupled to a cut part cut in the front and rear direction of the hull to the deck part and fixed by welding, the second flange bottom The upper end of the first partition wall member is coupled to the second coupling groove of the extension part protruding from the surface, but the first upper joint member is welded and fixed at the opening of the second coupling groove, and is extrusion-molded; characterized in that it further comprises A bottom structure with the durability of a high-density polyethylene vessel. 9. The method of claim 8,
A third flange is fixed by welding at an arbitrary position on the upper surface of the lower right plate, and the lower end of the second bulkhead member partially overlaps with one side of the extended part protruding from the upper surface of the third flange and is fixed by welding, and the second lower joint member is extrusion-molded. ;
A fourth flange is fixed by welding at an arbitrary position on the bottom surface of the deck part, and a protruding piece protruding from the upper surface of the fourth flange is coupled to a cut part cut in the front and rear direction of the hull to the deck part and fixed by welding, the fourth flange bottom The upper end of the second bulkhead member is partially overlapped and fixed by welding on one side of the extended part protruding from the surface, and the second upper joint member is extrusion-molded; .

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