JPH07309296A - Water lock device for hydro-bicycle - Google Patents

Abstract

PURPOSE:To improve the pressure-proofness, airtightness and productivity by reducing the number of welded parts by abutting two trunk part element bodies each of which is formed to a bottomed cylinder shape through the deep drawing work for a sheet metal, by fitting the disc-shape partitioning wall with the inner periphery on each opened port end side, and carrying out the integral welding. CONSTITUTION:A water lock device 10 divides the inside of a hollow trunk part 11 to the left and right parts by a partitioning wall 12, and an exhaust introducing pipe 13 and an exhaust outlet pipe 14 are fitting-fixed in each partitioning part, and two communication pipes 15 are penetration-fixed on the partitioning wall 12, and the inside of each partitioned part is allowed to communicate each other. The trunk part 11 consists of two bottomed cylindrical trunk part element bodies 11a and 11b through the deep drawing work for a plate member, and each opened port end is opened-top-worked, and the partitioning wall 12 is fitted with the inner periphery, and each opened port end is abutted each other. Further, an annular flange 12a is formed by bending the outer peripheral end part of the partitioning wall 12 in the axial direction, and is press-fitted into the inner periphery of the opened port end. Further, the abutment part of each trunk body element body 11a, 11b is padding-welded (A), and fixed integrally with the partitioning wall 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water lock device connected to an exhaust system of a watercraft.

[0002]

2. Description of the Related Art As a conventional technique, there is one shown in FIG. In FIG. 5, reference numeral 1 denotes a water lock device, which is a cylindrical body part 2 formed by rolling a pipe material or a plate material.
And a disk-shaped partition wall 5 having a plurality of communicating pipes 8 penetratingly secured to the inner peripheral portion thereof, and the partition wall 5 is secured to the center of the body element body 2 in the left-right direction by plug welding. The inside of the body part 2 is partitioned into left and right, and the left and right chambers in the body part 2 are communicated with each other by the communication pipe 8. Further, caps 3 and 4 are welded and fixed to both left and right ends of the body element body 2 to close both ends of the body element body 2, and the shaft center of the left cap 3 is connected to the exhaust side of the engine. The exhaust introduction pipe 6 is fitted and fixed, and the exhaust outlet pipe 7 is fitted and fixed laterally (outward in the radial direction) to the right part of the body.

[0003]

In the above-mentioned prior art, the body portion is formed of three parts, that is, the body portion body 2 and the caps 3 and 4, so that the number of parts increases and the number of welding points increases. However, there are drawbacks such as pressure leakage due to welding defects, etc., and poor reliability of airtightness. In addition, the body part is formed of three parts, the body part body 2 and the caps 3 and 4,
Since the partition wall 5 is fitted inside the body portion 2 and plug welding is performed, there is a drawback that the number of working steps increases and the productivity becomes poor. SUMMARY OF THE INVENTION It is an object of the present invention to obtain a novel water lock device for a watercraft that eliminates the above drawbacks.

[0004]

In order to achieve the above object, the present invention is configured as follows. That is, two body elements formed by deep-drawing a sheet metal material to form a bottomed cylinder face each other at their opening end sides, and each opening end portion has a disk-shaped partition wall on its inner circumference. Fitting and butting, the three parts of the butted portion and the partition wall are integrally fixed by welding, and an exhaust introduction pipe and an exhaust outlet pipe are provided on one body element body and the other body element body to form a partition wall. A communication pipe is provided on the inner peripheral portion of each of the body parts for communicating the indoor parts of the body parts. In this case, it is preferable that each of the body parts is formed by deep drawing an aluminum alloy plate.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a partial sectional side view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part thereof, and FIGS. 3 and 4 are III-III and IV-IV sectional views of FIG. In FIG. 1, 1
0 is an aluminum alloy material with excellent corrosion resistance, eg JIS standard A
The water lock device is made of 5052 material, and the inside of the hollow body 11 elongated in the left-right direction is separated by the partition wall 12.
Partition into the left and right, the exhaust introduction pipe 13 is fitted and fixed to the center of the left end of the body 11, the exhaust outlet pipe 14 is fitted and fixed to the right side surface (upper side surface) of the body 11, and two pieces are provided on the partition wall 12. The right and left chambers in the body portion 11 are communicated with each other by penetrating and fixing the communication pipe 15 of.

The body 11 is made of a plate material (A5
052P-0) is deep-drawn to, for example, an inner diameter of 145.5.
mm and depth 225 mm, two bottomed cylindrical body parts 1
1a and 11b are formed, the open ends of the body parts 11a and 11b are groove-processed, and a disk-shaped partition wall 12 is fitted to the inner circumference to abut the open ends. The partition wall 12 is bent at its outer peripheral end in the axial direction to form an annular flange 12a, and the outer diameter of the flange 12a is made slightly larger than the inner diameter of the opening end so as to be press-fitted into the inner periphery of the opening end. To do. Then, as shown in FIG. 2, the abutting portions of the body elements 11a and 11b, that is, the groove portions, are welded by welding (A).
Then, the three body parts 11a and 11b and the partition wall 12 are fixed at the same time.

As shown in FIG. 1, the exhaust introduction pipe 13 is inserted into the body portion body 11a on the left side from the left end side, and the outlet 13a on the inner end side is formed in the body body body 11a with the axis center. The opening is made in the direction orthogonal to the direction (downward in FIG. 2). The exhaust outlet pipe 14 is, as shown in FIGS. 1 and 4, one side portion (upper side in FIG. 1) of the body portion body 11b on the right side.
The inner end side inlet 14a is opened in the body element body 11b in the direction orthogonal to the axis (downward in FIG. 2). Further, as shown in FIGS. 1 and 3, the communication pipe 15 is fixed to the inner peripheral portion of the partition wall 12 at a predetermined interval so as to communicate the left and right body elements 11a and 11b with each other. Then, the exhaust introduction pipe 13 is connected to a muffler (not shown) on the engine side, and the exhaust outlet pipe 14 is connected to an exhaust pipe (not shown) exposed outside the hull.

According to the above-mentioned embodiment, since the body 11 is formed by the two cylinder-shaped body bodies 11a and 11b having a bottom, the number of welding points is reduced and the reliability of the airtightness is high. Become. In addition, the outer peripheral portions of the partition wall 12 that divides the interior of the body portion 11 are used to position the left and right body portion bodies 11a and 11b so that both body portion bodies 11a and 11b and the partition wall 12 are welded and fixed at the same time. As a result, the assembling accuracy is increased, the man-hour is reduced, and the productivity is increased. Also,
Since each of the body parts 11a and 11b is formed into a cylindrical shape with a bottom by deep drawing, the material and plate thickness of the material can be easily selected according to the model.

Exhaust gas discharged from the engine (not shown) flows into the left body part 11a from the exhaust introduction pipe 13 via the muffler and then through the communication pipe 15 to the right part. The body element body 11b flows into the body element body 11b.
After being muffled by repeating expansion and contraction in a and 11b,
The gas is discharged from the exhaust outlet pipe 7 to the outside of the hull. In this case, JI
If the aluminum alloy material of S standard A5052 is used, the durability is increased and the exhaust noise (especially high frequency noise) is reduced. In addition, the exhaust outlet pipe 7 due to the fall of the hull, etc.
The water (seawater) entering from the side has a large body 11
Also, the partition wall 12 prevents the exhaust gas introduction pipe 13 from entering.

[0010]

As is apparent from the above description, according to the present invention, the number of welded points is reduced, the reliability of pressure resistance and airtightness is improved, and the number of manufacturing steps is reduced, resulting in higher productivity. Further, the body portion can be easily formed of a material and a plate thickness suitable for the model, and a water lock device excellent in durability and sound deadening effect can be obtained.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a sectional side view showing a conventional example.

[Explanation of symbols]

 10 Water Lock Device 11 Body 11a Body Element 11b Body Element 12 Partition 12a Flange 13 Exhaust Inlet Pipe 14 Exhaust Outlet Pipe 15 Communication Pipe (a) Overlay Welding

Claims (2)

[Claims] 1. Two body elements formed by deep-drawing a sheet metal material into a cylindrical shape with a bottom are opposed to each other at their opening end sides, and each opening end portion has a disk shape on its inner circumference. The butts and the butts and the butts are integrally fixed by welding, and the one body body and the other body body are connected to each other with the exhaust introduction pipe and the exhaust outlet pipe. A water lock device for a watercraft, comprising a communication pipe provided on an inner peripheral portion of a partition wall, the communication pipe communicating with the indoors of the body bodies. 2. The water lock device for a watercraft according to claim 1, wherein each body element body is formed by deep drawing an aluminum alloy plate material.