JP2013244984A - Large chemical tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical tank for storing and transporting chemicals, which is improved in its transportation efficiency after being collected when the chemical tank has discharged the chemicals and does not store them.SOLUTION: A large chemical tank includes a storing body for storing chemicals by being injected with them, a containing body for preventing deformation and breakage due to an external pressure against the storing body, a lid member for being joined with the containing body to seal the chemicals therein, and a pipe member for injecting and discharging the chemicals. The containing body has a rectangular-box shape in which one end is opened, and has a structure in which surrounding walls can be folded inward of the containing body. The storing body is made of stainless foil or resin and has a rectangular-box shape in which one end is opened.

Description

  The present invention relates to a chemical tank, for example, a tank for storing and transporting agricultural chemicals, pharmaceuticals, and non-aqueous electrolytes.

Patent Document 1 describes a chemical tank used for storage and transportation by injecting chemicals such as agricultural chemicals and pharmaceuticals and non-aqueous electrolytes used in lithium ion secondary batteries. Thus, it is comprised by the main body member which stores a chemical | medical agent, the cover member which seals a chemical | medical agent, and the pipe member which injects / discharges a chemical | medical agent. In addition, the main body member is composed of a cylindrical body and a bottom plate, each of which is assembled by arc welding, and the pipe member for injecting and discharging chemicals is inserted from the insertion port provided in the lid member. is there. Furthermore, in order to seal the chemical within the main body member, the lid member is joined with a bolt via a sealing material.
Such a chemical tank repeats “delivery” and “collection / return” as follows. First, “delivery” is a stage of transporting a chemical tank to a destination in a state where the injected chemical is stored in a container. Next, the "collection / return" became empty because the medicine stored in the container was discharged to another storage facility such as a tank or container at the delivery destination, and then the inside of the tank was washed and reused. This is the stage for transporting chemical tanks.

Japanese Patent No. 3162329

  In this way, in the conventionally proposed chemical tank structure, when the tank is returned, it is transported in an empty tank state, so the volume does not change even though the chemicals in the contents are not stored. There is a problem that it is very inefficient without carrying out more tanks than usual, and the transportation cost becomes high.

  Therefore, an object of the present invention is to provide a chemical tank structure that can carry out a larger number of chemical tanks at the time of return than at the time of delivery and reduce the transportation cost.

In order to achieve the object, the chemical tank according to the present invention injects and stores a chemical, stores a container that prevents deformation and breakage due to external pressure on the chemical, and stores the chemical to seal the chemical. It consists of a lid member that is fastened to the body and a pipe member that injects and discharges chemicals, and the storage body is a square box with one end open, and the surrounding wall extends into the storage body. It is characterized by a foldable structure.
Further, the storage body for injecting and storing chemicals is also characterized by a rectangular box shape with one end opened using stainless steel foil or resin as a material.

In the chemical tank of the present invention, a storage body for injecting chemicals and a storage body for storing the storage body are divided, and the storage body is a rectangular box with one end open, The wall has a structure that can be folded into the storage body. Therefore, when returning an empty tank, the volume around the container is reduced by folding the wall around the container and transforming it into a plate shape, making it less bulky, so it is possible to transport more chemical tanks than during delivery. is there.
Also, when stainless steel foil is used as the material of the storage body, it is easy to crush because the plate thickness is thin, so the storage body can be crushed and discarded relatively easily, and this requires the storage body to be returned. Therefore, the transportation cost can be kept low.
Furthermore, even when the material of the storage body is made of resin, it can be easily crushed and discarded because the strength is lower than that of metal, which eliminates the need to return the storage body, thereby reducing transportation costs. .

Cross-sectional schematic diagram showing the structure of the chemical tank of the present invention The figure which shows the folding state of the storage body of this invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing the structure of a chemical tank 1 according to an embodiment of the present invention. The chemical tank 1 includes a storage body 2 for injecting and storing chemicals, a storage body 3 for preventing deformation and breakage due to external pressure on the storage body, and a lid member fastened to the storage body for sealing the chemicals. 18 and a pipe member 17 for injecting and discharging chemicals.

(Container)
The storage body 3 has a rectangular box shape with one end opened to store the storage body 2 therein. A bottom plate 8 is provided at the bottom opposite to the opened one end, and a transport unit 16 is provided on the bottom plate 8 so as to be easily moved by inserting a claw of a forklift during transportation. 6 has a structure that can be folded into the interior of the housing 3. As shown in FIG. 2, the peripheral wall 6 can be folded by rotating the connection fitting 7 that connects the peripheral wall 6 and the bottom plate 8. Similarly, the peripheral walls 6 can be connected by a connection fitting 7 that can be rotated by 90 °. When injecting and delivering chemicals to the storage body 2, the peripheral wall 6 is erected vertically using these connection fittings 7, and the peripheral walls 6 are connected to each other using the connection fitting 7, flange 13, and bolt 9. The box-shaped storage body 3 is assembled by fixing.
At the time of returning, the flange 13 and the bolt 9 that connect and fix the peripheral wall 6 are removed, and the connecting fitting 7 between the bottom plate 8 and the peripheral wall 6 is rotated as shown in FIG. It is folded on the bottom plate 8 and transported in a plate shape (not shown). Thereby, the storage body 3 which requires the most space at the time of transportation can be made small.

(Cover member, pipe member)
The lid member 18 is roughly composed of the lid 4 and the lower flange 11. The lid 4 has an insertion port 10 through which the pipe member 5 is passed. In addition, a hole for passing the bolt 9 from the lid 4 to the flange 13 of the peripheral wall 6 is formed around the lid 4. A bolt hole for passing the bolt 9 from the upper flange 12 of the pipe member 17 is formed around the lower flange 11.
The pipe member 17 includes a pipe 5 for injecting chemicals into the storage body 2 and the upper flange 12. Further, a hole for passing the bolt 9 to the lower flange 11 is formed around the upper flange 12.

(seal)
In the chemical tank 1, in order to seal the chemical stored in the storage body 2, sealing (sealing) is performed between the storage body 2 and the lid member 18 and between the lid member 18 and the pipe member 17. Do.

(Conclusion)
The lid member 18, the storage body 2, and the storage body 3 are fixed so as to be integrated with each other using the flange 13 of the peripheral wall 6. For this reason, a flange 13 is welded to each upper wall of the peripheral wall 6 that is foldable, and a female thread portion is provided on the flange, and a sealing material is provided between the lid 4 and the flange 13. After assembling with 14, the bolt 9 is fastened from the lid 4 to the flange 13 with the bolt 9.
The lid member 18 and the pipe member 17 are also fastened and fixed with bolts 9 via a seal 14 between the lower flange 11 and the upper flange 12 attached to both members.

(Reservoir)
As the storage body 2 for injecting and storing chemicals, a storage body 2 made of stainless steel foil and having a rectangular shape corresponding to the inner volume of the storage body 3 and having a flange 15 at the opening is used.
In the flanges 15 of these storage bodies 2, holes are made at the same positions as the female screw portions opened around the lid 4. When storing in the storage body 3, the flange 15 of the storage body 2 is placed on the flange 13 of the peripheral wall 6, the sealing material 14 is further placed thereon, and the lid 4 of the lid member 18 is then installed. The container 9 and the lid member 4 are fixed together with bolts 9.
Even when a resin is used as the material of the storage body 2, the structure is the same as that of the stainless steel foil.

The materials for the container 3, the lid member 18, and the pipe member 17 of the chemical tank 1 are not particularly defined, but the steel has a relatively high strength so that it can withstand some external pressure during the protection of the storage body 2 and transportation. A material is preferred.
In addition, the material and thickness of the stainless steel foil as the material of the storage body 2 are not specified, but any one of austenitic stainless steel, ferritic stainless steel, martensitic stainless steel can be used as long as the corrosion resistance to the chemicals contained therein can be secured. The thickness of the plate is preferably 100 micrometers or less in consideration of forming into a box shape.
Even when the material of the storage body 2 is a resin, any material and thickness may be used as long as the content can be ensured with respect to chemicals as contents, but the thickness is 0.5 mm in consideration of the case of storage. It is preferable to have flexibility below.

As the chemical tank 1 shown in FIG. 1, a part of the container 3 excluding the transport unit 16 was manufactured such that the width was 1000 mm × depth 1000 mm × height 1000 mm, and the transport unit 16 had a height of 300 mm. The container 3 and the lid 4 are each made of 2 mm thick austenitic stainless steel, and the pipe 5 is also a TIG welded pipe of the same steel type with an outer diameter of 20 mm and a plate thickness of 1.5 mm. A flange having a plate thickness of 4 mm and an outer diameter of 60 mm was joined to the lid member 18 and the pipe member 17 by TIG welding to form a lower flange 11 and an upper flange 12, respectively. The lower flange 11 was provided with six M6 female screw portions, and the upper flange 12 of the pipe member 17 was provided with six 9 mm holes.
The flange 13 welded and attached to each opening of the surrounding wall 6 to be folded has a width of 12 mm and a plate thickness of 4 mm. Four M6 female screw portions are provided on one side, and the lid 4 is also the same as the female screw portion. A 9 mm hole was provided at the position. The conveyance unit 16 was joined to the bottom four sides of the bottom plate 8 by TIG welding using an austenitic stainless steel square pipe having a side of 50 mm, a plate thickness of 1.5 mm, and a length of 300 mm. The connection fitting 7 and the bolt 9 were also made of austenitic stainless steel.

The storage body 2 is made of austenitic stainless steel foil having a thickness of 100 micrometers, and a rectangular box shape or flange 15 is formed in accordance with the internal volume of the storage body 3 and the flange 13. A hole of φ9 mm was provided in accordance with the position of the 13 female screw portions.
After the peripheral wall 6 of the storage body 3 was erected and the peripheral walls 6 were assembled by the connection fitting 7, the storage body 2 made of austenitic stainless steel foil was stored in the storage body 3. Then, the flange 15 and the sealing material 14 of the storage body 2 were placed on the flange 13, and the lid 4 of the lid member 18 was placed and fastened with the bolt 9. Subsequently, the upper flange 12 of the pipe member 17 was placed on the lower flange 11 of the lid member 4 via the sealing material 14 and fastened with the bolts 9.
The sealing material 14 was made of polypropylene and had the same dimensions as the flanges 12 and 13, and a 9 mm hole was also provided at the same position as the flanges 12 and 13.

  A chemical tank 1 was produced in the same manner as in Example 1 except that polypropylene having a plate thickness of 0.5 mm was used as the material for the storage body 2.

Ten chemical tanks 1 were assembled and brought to an electrolytic solution manufacturing factory, and 0.8 m ^{3 of} a lithium ion battery electrolytic solution based on lithium hexafluorophosphate was injected into each tank. Thereafter, the chemical tank 1 was loaded on a truck and transported to a battery manufacturing factory about 500 km away at night for 8 hours. At this time, only six chemical tanks 1 could be mounted on one truck.

In the battery manufacturing factory, after the electrolyte was extracted from the chemical tank 1, the chemical tank 1 was disassembled and the polypropylene storage body 2 was taken out to evaluate the state of the storage body 2. No abnormality such as deformation or liquid leakage was observed in any of the storage bodies 2.
The polypropylene storage body 2 after removing the electrolyte was discarded, and the connection fitting 7 of the storage body 3 was rotated to fold the four peripheral walls inward. Due to the compact size of the storage body 3, 12 tanks could be mounted on the truck for returning the chemical tank 1 from the battery manufacturing factory to the electrolyte manufacturing factory.
In the electrolytic solution manufacturing factory, the lid member 18 and the pipe member 17 were cleaned, and the housing 3 was reassembled. In addition, a new storage tank 2 made of polypropylene is used to assemble the chemical tank 1 from the storage body 3, the storage body 2, the lid member 18, and the pipe member 17, and then inject an electrolyte to deliver the tank. Could be used.
Even in the case of the chemical tank 1 that had stored the resin storage body 2 as the storage body 2 at the previous delivery, collection and return, the storage body 2 made of stainless steel foil is stored at the next delivery, recovery and return. There was no problem to transport.

  In the chemical tank according to the present invention, the storage body for storing the chemical and the rectangular box-shaped storage body for storing the storage body are separate members, and the storage body is formed by folding the surrounding wall inside the storage body. It becomes compact without being bulky. Therefore, when returning and collecting the chemical tank, a larger number of chemical tanks can be transported than when delivering, which is efficient and advantageous in terms of cost.

DESCRIPTION OF SYMBOLS 1 Chemical tank 2 Storage body 3 Storage body 4 Lid 5 Pipe 6 Perimeter wall 7 Connection metal fitting 8 Bottom plate 9 Bolt 10 Insert 11 Lower flange 12 Upper flange 13 Flange 14 of the surrounding wall 6 Sealing material 15 Flange 16 of the storage material 42 Part 17 Pipe member 18 Lid member

Claims (3)

  Regarding a chemical tank for storing and transporting chemicals, a storage body for injecting and storing chemicals, a storage body for preventing deformation and damage due to external pressure to the storage body, and the storage body for sealing chemicals And a pipe member for injecting and discharging chemicals, and the storage body is a square box with one end open, and the surrounding wall can be folded inside the storage body. A chemical tank characterized by its structure.   2. The chemical tank according to claim 1, wherein the storage body is made of a stainless steel foil and has a rectangular box shape with one end opened. 2. The chemical tank according to claim 1, wherein the storage body is made of resin as a raw material and has a rectangular box shape with one end opened.

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