JPH046076A - Closed tank and manufacture thereof - Google Patents

Abstract

PURPOSE:To simplify a process through reduction of the number of weld spots by a method wherein, in a closed tank formed such that an internal space is partitioned into two compartments by means of one partition wall disposed in the internal space, an outer peripheral wall is formed with a pair of armform bodies arranged adjacently to the partition wall. CONSTITUTION:A closed tank comprises a pair of arm members 18 and 18 each being formed such that a cylinder body being a half of an intermediate part 13 of an outer peripheral wall 12 and an approximate spherical part being a closed part 14 are integrally formed. Thus, a closed tank 11 is formed such that three members of a pair of the arm members 18 and 18 and a partition wall 17 are integrally formed by weld. The partition wall 17 and a pair of the arm members 18 and 18, which the closed tank 11 comprises, are formed of an aluminum alloy so as to decrease the weight of the closed tank 11. Processing is applied on the end surfaces of the arm members 18 and 18 to form sloping bevellings 19 and 19 arranged in a V-shape. Simultaneously, the end parts in the direction of thickness of the outer peripheral surface of the partition wall 17 are cut off so that the diameter of the partition wall is made approximately equal to the inner diameter of each arm members 18, and an annular protrusion part 20 is formed on the central part in the direction of thickness of the outer peripheral surface of the partition wall 17.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sealed tank having an internal space divided into a plurality of chambers by a partition wall, and a method for manufacturing the same, and is particularly applicable to vehicles, ships, industrial machinery, etc. The present invention relates to a closed tank suitable for use as a tank for a control device using gas, liquid, etc., and a method for manufacturing the same.

[Conventional technology]

Vehicle air brakes, which are one type of this type of control device, are
In general, it is a full-power one-way type that uses air as the transmission medium, so there are no problems such as pollution even if it is released to the outside.In addition, in buses etc., the air pressure of the air brake can be used to seal the door, etc. Furthermore, air brakes are widely used in large vehicles because the air pressure of the air brake allows the driver section and cargo section to be easily attached and detached from each other in trailers. Note that a variety of control devices using air pressure or hydraulic pressure are used in ships, industrial machinery, and the like.

The above-mentioned control device has a sealed tank for storing a transmission medium such as gas or liquid, and a pipe line is connected to this sealed tank to utilize air. The sealed tank is generally configured to include an internal cavity that stores the transmission medium and is sealed by an outer circumferential wall formed by closing both ends of a cylindrical intermediate portion with substantially spherical closing portions.

By the way, there is a control m+ device mentioned above that is capable of controlling multiple systems individually, and as a sealed tank used in this type of control device, at least one partition wall is arranged in the internal space. However, it is known that the interior space is divided into multiple chambers.

First, an example of such a conventional hermetic tank whose interior is divided into two chambers will be described with reference to FIG.

In FIG. 4, the outer circumferential wall 2 of the sealed tank 1 has the following structure:
A cylindrical intermediate section 3 composed of a pair of coaxially arranged cylindrical bodies 3A and 3B, and a pair of substantially spherical closing sections 4 that are connected to the intermediate section 3 and close both ends of the intermediate section 3. ．．
4. Moreover, a sealed internal space 5 is formed inside this outer peripheral wall 2,
In the longitudinal center of this internal space 5, an internal space 5 is provided.
A partition wall 7 is provided to divide the interior into two chambers 6, 6.

Conventionally, the sealed tank 1 constructed as described above was formed in the following manner.

First, in order to form each cylindrical body 3A, 3B, a material such as an iron alloy or an aluminum alloy is cast to form a casting, and this casting is rolled in a rolling mill to form a plate shape. do. Next, it is possible to form the cylindrical bodies 3A and 3B by cutting into a longitudinal plate of predetermined dimensions, bending this rectangular plate to form a cylindrical shape, and joining and welding both side edges. can.

In addition, in order to form each closing portion 4, the cylindrical bodies 3A, 3
The same material as B is cast and rolled to form a plate, which is then cut into discs of predetermined dimensions, and this disc is put through a drawing press to perform deep drawing to form the spherical closing part 4. Form.

Furthermore, in order to form the partition wall 7, the cylindrical body 3-A,
The same material as 3B is cast and rolled to form a plate shape, and then a circular plate partition wall 7 of predetermined dimensions is formed.

Then, by sandwiching the partition wall 7 between the inner cylindrical bodies 3A, 3B and welding the ends of each cylindrical body 3A, 3B to the outer peripheral edge of the partition wall 7, each end of the cylindrical bodies 3A, 3B The outer peripheral edge of the partition wall 7 is integrated with the intermediate portion 3 in which the partition wall 7 is disposed. Therefore, by connecting the closing portions 4 to both ends of the intermediate portion 3 by welding, a sealed tank 1 having an internal space 5 is formed.

[Problem to be solved by the invention]

However, according to the conventional manufacturing method of the hermetic tank 1 described above, the welding portions are the same as each cylindrical body 3A.

Welding points on both sides of 3B, cylindrical bodies 3A, 3B and partition wall 7
There are 5 welding points, including 5 welding points between both ends of the intermediate part 3 and the pair of closing parts 4, 4, and the welding length is long, so there is a risk that the air in the internal space 5 will leak at the welded part. big.

Furthermore, when welding is performed, there are areas on both sides of the welded part where the strength decreases due to heat, but since the welding length is long, the range where the strength decreases is wide and there is a safety problem.

Furthermore, since the welding length is long, a considerable amount of time and effort is required for bevel processing as pre-treatment for welding, and for performing X-ray tests, color check tests, soap tests, etc. on the welded parts.

The present invention overcomes these problems with conventional products, allows the use of inexpensive materials, and simplifies the process by reducing the number of welding points compared to conventional products, while also improving safety. An object of the present invention is to provide a closed tank such as an air tank and a method for manufacturing the same.

[Means to solve the problem]

In order to achieve the above-mentioned object, the sealed tank of claim 1 forms a sealed internal cavity inside the outer circumferential wall, which is formed by closing both ends of a cylindrical intermediate part with a substantially spherical closing part. Then, in this internal space, f! A sealed tank having an internal space divided into two chambers by a single partition wall, characterized in that the outer peripheral wall is formed by a pair of bowl-shaped bodies each disposed adjacent to the partition wall. There is.

The hermetically sealed tank according to claim 2 has a cylindrical intermediate portion whose both ends are closed by substantially spherical closing portions to form a sealed internal cavity inside the outer circumferential wall. In a sealed tank having an internal cavity divided into at least three chambers by at least two partition walls arranged at intervals within the tank, the outer circumferential wall is formed by a pair of bowls arranged adjacent to each partition wall. It is characterized by being formed by a cylindrical body and at least one cylindrical body disposed between a pair of adjacent partition walls.

Furthermore, the method for manufacturing a sealed tank according to claim 3 includes forming a sealed internal space inside the outer peripheral wall formed by closing both ends of the cylindrical intermediate portion with substantially spherical closing portions; In a sealed tank in which the interior of the interior cavity is divided into two chambers by a partition wall disposed within the interior cavity, a material is cast to form a casting, and this casting is forged to at least approximately A pair of bowl-shaped bodies each having a spherical closing portion are formed, and the outer peripheral edge of the partition wall and the end face of the other bowl-shaped body are brought close to the end face of one of the bowl-shaped bodies, and the end face of the partition wall is It is characterized by welding along the outer periphery to integrate the pair of bowl-shaped bodies and the partition wall.

Furthermore, the method for manufacturing a sealed tank according to claim 4 includes:
A sealed internal space is formed inside an outer circumferential wall formed by closing both ends of a cylindrical intermediate part with substantially spherical closing parts, and at least two partition walls are disposed within this internal space. In a sealed tank having an internal cavity divided into a plurality of chambers, a material is cast to form a casting, and this casting is forged to form a pair of bowl-shaped bowls each having a closing portion having at least a substantially spherical surface. form a body, bring the outer peripheral edge of the partition wall and the end face of the cylindrical body close to the end face of each bowl-shaped body, and perform welding along the outer periphery of the partition wall to integrate the bowl-shaped body, the partition wall, and the cylindrical body. It is characterized by the fact that it has become

[For production]

According to the present invention having the above-described configuration, the partition wall is directly welded to the end face of the bowl-shaped body having the closed portion of the outer circumferential wall, so that a sealed tank can be constructed with a small number of welded parts. A sealed tank with high safety can be obtained, and it can be manufactured with fewer manufacturing steps.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of a sealed tank according to the present invention, and the sealed tank in this embodiment has a two-chamber structure.

In this embodiment, the outer peripheral wall 12 of the sealed tank 11 in 'I3 is as follows:
Like the conventional one described above, it is composed of a cylindrical intermediate section 13 and a pair of substantially spherical closures 114, 14 that are connected to this intermediate section 13 and close both ends of the intermediate section 13. . Moreover, a sealed internal space 15 is formed inside this outer peripheral wall 12, and at the center of the internal space 15 in the longitudinal direction, there are two
Horn! In this embodiment, the outer circumferential wall 12 has a cylindrical body which is a half of the middle part 13 of the outer circumferential wall 12 and a substantially spherical part which is the closing part 14. A pair of arm members 18 integrally formed with
．． 18, and therefore, the sealed tank 11 used in this embodiment is constructed by integrating three members, a pair of arms 018, 18 and a partition wall 17, by welding. That will happen. Note that the partition wall 17 and the pair of arm members 18 and 18 that constitute the hermetic tank 11 are made of aluminum alloy in order to reduce the weight of the hermetic tank 11.

Next, a method for manufacturing the sealed tank 11 configured as described above will be explained.

In order to form each arm member 18, an aluminum alloy is cast to form a casting, and this casting is forged to form the arm member 18, which is a cylindrical body with a spherical part connected to it. Forging includes hot forging, cold forging, and molten metal forging.
The arm member 18 can be formed by selecting these appropriately.

On the other hand, in order to form the partition wall 17, a casting made of the same aluminum material as each arm member 18 is hot forged to form a disk-shaped partition wall having a dimension slightly larger than the inner diameter of each arm member 18. form 17. Note that the partition wall 17 may be formed by rolling.

Then, as shown in FIG. 2, a V-shaped inclined groove 19.19 is formed on the end face of each arm member 18. An annular protrusion 20 is formed at the center of the outer peripheral surface of the partition wall 17 in the thickness direction by cutting grooves on both sides so that the inner diameter is approximately equal to the inner diameter of each arm member 18 . In this way, each arm member 18 and the partition wall 17 are processed in advance, and both arm members is and ia are butted together so that the annular protrusion 20 of the partition wall 17 is held between the arm members 18°18. Welding is performed to integrate the ends of each arm member 18, 18 and the outer periphery of the partition wall 17 as shown by phantom lines in FIG. Note that various known welding methods can be applied to this welding.

In this way, two partitions are partitioned inside by the partition wall 17.
A closed tank 11 with two chambers 16.16 can be formed.

According to the method of manufacturing the sealed tank 11 of the present embodiment described above, first, an aluminum alloy casting is forged to form the partition wall 1.
7 and the arm member 18, it is possible to obtain necessary and sufficient strength for each member by forging. Therefore, in the past, there was no process that could obtain strength, so the material itself was required to have a certain degree of strength, but since the material itself does not require that much strength, it is possible to use inexpensive materials. be able to.

Furthermore, since there is only one welding point and the welding length is short, the effort required to prepare a bevel for the welding point is simplified, and the number of man-hours for testing the welding point can be reduced.

Furthermore, the completed sealed tank 11 has only one welding point and a short welding length, so there is little risk of air leakage in the chamber 16, and the area where the strength decreases due to the heat of welding is narrow, making it safe. Improves sex.

Furthermore, since equipment for forging is extremely inexpensive compared to equipment for rolling, the sealed tank can be manufactured at low cost in this respect as well.

FIG. 3 shows another embodiment of the sealed tank according to the present invention, and the sealed tank 11A of this embodiment has an internal space 1.
Three flames 16A and 16A in 5A.

Equipped with 16A.

In such a configuration, the outer peripheral wall 12A includes a pair of arm members 18.18 similar to those in the sealed tank 11 of the first embodiment described above, and a pair of arm members 18.18 interposed between these arm members 18.18. By sandwiching and welding the partition wall 17 between each end of the cylindrical body 21 and one arm member 18, three chambers 16 are formed.
A closed tank 11A containing A, 16A, and 16A is formed.

Note that, like the partition wall 17 and bowl member 18, the cylindrical body 21 is formed by forging an aluminum alloy casting into a plate shape, and then cut into rectangular plates of predetermined dimensions. It is formed by making it curve, joining both side edges to each other, and welding along both side edges. Note that as forging, there are hot forging, cold forging, and molten metal forging as described above, and the cylindrical body 21 can be formed by selecting any of these as appropriate. Note that the cylindrical body 21 may be formed by rolling.

This embodiment can also provide the same effects as the first embodiment described above.

Note that the present invention is not limited to the two embodiments described above, and various changes can be made as necessary. For example, the number of palms formed within the internal cavity may of course be four or more. Also, the closed tank can be applied to store various transmission media.

〔Effect of the invention〕

As explained above, according to the present invention, each member is formed by forging, so sufficient strength can be obtained by forging, inexpensive materials can be used, and forging equipment is inexpensive, so these This makes it possible to manufacture sealed tanks at low cost.

In addition, since there are few welding points in the sealed tank and the weld length is short, it is possible to easily perform pre-treatment during welding and post-welding tests.

Furthermore, since the completed sealed tank has a short weld length, there is less possibility of internal air leakage, and the range of parts where the strength is reduced due to the heat of welding is small.

[Brief explanation of drawings]

Fig. 1 is a partially vertical front view of a sealed tank showing a first embodiment of the present invention, Fig. 2 is an enlarged view of the welded part in Fig. 1, and Fig. 3 is a sealed tank showing a second embodiment of the invention. FIG. 4 is a partially vertical front view of the tank, and is a schematic front view of a conventional example. 1.11.11A... Sealed tank, 2.12゜12A
...Outer peripheral wall, 3, 13... Middle part, 4, 14...
Blocked part, 5, 15... Internal void, 6.16.16A.
... Room, 7, 17 ... Partition wall, 18 ... Bowl member, 1
9... Groove, 20... Annular protrusion, 21... Cylindrical body. Engraving of drawings (no changes in content) Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1) A sealed internal space is formed inside the outer peripheral wall formed by closing both ends of the cylindrical intermediate part with substantially spherical closing parts, and the device is disposed within this internal space. In a sealed tank in which the interior space is divided into two chambers by a single partition wall, the outer circumferential wall is divided into two chambers arranged adjacent to the partition wall.
A sealed tank characterized by being formed by a pair of bowl-shaped bodies. 2) A sealed internal space is formed inside the outer circumferential wall by closing both ends of a cylindrical intermediate part with substantially spherical closing parts, and the pipes are arranged at intervals within this internal space. At least 2 partition walls define at least 3
In a sealed tank divided into chambers, the outer peripheral wall is
1. A closed tank characterized in that it is formed by a pair of bowl-shaped bodies each disposed adjacent to a partition wall, and at least one cylindrical body disposed between a pair of adjacent partition walls. 3) A sealed internal space is formed inside the outer circumferential wall by closing both ends of a cylindrical intermediate part with substantially spherical closing parts, and a single partition is placed within this internal space. In a closed tank having an internal cavity divided into two chambers by a wall, a pair of bowls are formed by casting a material to form a casting, and forging the casting to provide a closure having at least a substantially spherical surface. A pair of bowl-shaped bodies are formed by forming a pair of bowl-shaped bodies, bringing the outer peripheral edge of the partition wall and the end face of the other bowl-shaped body close to the end face of one bowl-shaped body, and welding along the outer periphery of the partition wall. and a method for producing a sealed tank characterized by integrating a partition wall. 4) A sealed internal space is formed inside the outer circumferential wall formed by closing both ends of the cylindrical intermediate part with substantially spherical closing parts, and at least two plates are arranged in the internal space. In a closed tank having an internal cavity divided into a plurality of chambers by a partition wall, a material is cast to form a casting, and this casting is forged to form a pair of closed parts each having at least a substantially spherical closing part. A bowl-shaped body is formed, the outer peripheral edge of the partition wall and the end face of the cylindrical body are brought close to the end face of each bowl-shaped body, and welding is performed along the outer periphery of the partition wall to form the bowl-shaped body, the partition wall, and the cylindrical body. A method for manufacturing a sealed tank characterized by integrating the.