JP4678492B2 - Tank container inner bag, tank container inner bag manufacturing method, and tank container inner bag mounting method - Google Patents

Description

  The present invention relates to an inner bag for a tank container used for a tank container for transporting liquid cargo or granular cargo, and particularly preferably an ISO tank container (an ISO standard 20-foot tank container which is an international standard). It is related with the inner bag for ISO tank containers applied to.

  Since the ISO tank container is manufactured based on international standards, it is highly safe and has a large transportation amount, which is advantageous in terms of cost and its use is increasing. However, when liquid cargo or granular cargo is transported using an ISO tank container, it is necessary to clean the inside of the ISO tank container in order to transport the next liquid cargo or granular cargo at the destination. In addition, the cost required for the cleaning process of the ISO tank container occurs, and depending on the type of liquid cargo or granular cargo, it may be difficult to process the cleaning waste water.

Therefore, as a method that can omit the cleaning process of the tank container, the inner bag is accommodated and mounted in the tank container, and the inner bag is replaced every time the transportation process is completed, so that the cleaning process in the tank container is not required. The non-cleaning method is adopted.
As a prior art employing such a non-cleaning method, Patent Document 1 discloses that in an intermediate-sized liquid container of a 1000 liter class, an inner bag accommodated and mounted in the liquid container can be replaced after use. Is disclosed.
Further, as a conventional tank container inner bag, Patent Document 2 discloses a tank container inner bag devised so that the contents in the inner bag are not spilled when the inner bag is collected from the tank container. .
JP 2000-43982 A JP-A-10-287389

In the inner container for tank container disclosed in Patent Document 1, a hollow hole connected to the pouring outlet at the bottom of the tank is formed, and a socket is inserted into the hollow hole to attach the inner bag to the tank. Since the sheet constituting the inner bag is directly sandwiched between the inner wall surface of the tank and the insertion socket, the tightening load acts on the sheet itself, the inner bag is damaged, and the liquid stored in the inner bag is There is a risk of leakage into the tank.
In addition, the tank container inner bag disclosed in Patent Document 2 is attached by directly sandwiching the end portion of the inner bag between the outlet side flange of the container outlet and the valve side flange of the valve. As with the inner bag of Patent Document 1, a tightening load acts on the sheet itself, the inner bag is damaged, and the liquid stored in the inner bag may leak into the tank.

The present invention has been made in view of the above circumstances, and a first problem of the present invention is that when the inner bag is accommodated in the tank container and attached, the inner bag is brought into close contact with the inner wall surface of the tank. In addition, it can be damaged by excessive stress (clamping load) acting on the inner bag-tank mounting part, and liquid cargo stored in the inner bag can leak into the tank. There is no such inner bag.
In addition, the second problem of the present invention is that when the inner bag is accommodated and attached to the tank container, the inner bag can be accommodated in close contact with the inner wall surface of the tank, and the attachment portion between the inner bag and the tank is excessive. An object of the present invention is to provide a method of manufacturing an inner bag that does not break due to stress (clamping load) and liquid cargo stored in the inner bag does not leak into the tank.
Furthermore, the third problem of the present invention is that when the inner bag is accommodated and installed in the tank container, the inner bag can be accommodated in close contact with the inner wall surface of the tank, and the attachment portion between the inner bag and the tank is excessive. A method of attaching the inner bag to the tank container so that the inner bag is not damaged by the action of stress (clamping load) and liquid cargo stored in the inner bag does not leak into the tank. Is to provide.

In order to solve the first problem, the invention relating to the tank container inner bag according to claim 1 includes a flange opening (35, 35A, which is connected to the pouring / ejecting port (14) of the tank container (10). 35B) is a tank container inner bag (30) provided with a flange (33) formed of a material constituting the inner bag (30) at the periphery of the flange opening (35, 35A, 35B) . An annular recess (36) having a thickness approximately twice as large as that of the flange opening (35, 35A, 35B) is formed with a certain thickness so as to form a step, and the inner bag is formed in the annular recess (36). The periphery of the opening (31) of the inner bag (30) is positioned so that the periphery of the opening (31) of (30) is folded inward so as to overlap the periphery (32) of the opening (31). Japanese a part (32) that is welded to the annular recess (36) To.
Here, the annular recess (36) can be formed integrally with the flange (33) of the tank container inner bag (30) as in the invention described in claim 2.
The annular recess (36) is formed in the flange main body (34, 34A, 34B) in which the flange opening (35, 35A, 35B) is formed, as in the invention described in claim 3. A spacer opening (38) having a diameter larger than that of 35A, 35B) is formed, and a spacer (37) having a thickness about twice that of the material constituting the inner bag (30) is laminated and welded. it can.

Moreover, in order to solve the said 2nd subject, the invention which concerns on the manufacturing method of the inner bag for tank containers of Claim 4 manufactured the inner bag for tank containers in any one of Claims 1-3. It is a method, Comprising: The inner bag (30) in which the opening part (31) was formed in the appropriate place, and the periphery of the flange opening (35, 35A, 35B) connected to the pouring / ejecting port (14) of the tank container (10) In addition, an annular recess (36) having a thickness approximately twice that of the material constituting the inner bag (30) is recessed with a constant thickness so as to form a step with the flange opening (35, 35A, 35B). The flange (33) is prepared, and in the annular recess (36), the peripheral edge of the opening (31) of the inner bag (30) is overlapped with the peripheral edge (32) of the opening (31). folded back by positioning a peripheral portion of said opening (31) to (32) wherein Characterized by welding the Jo recess (36).
Furthermore, in order to solve the second problem, the invention according to the method for manufacturing an inner bag for tank containers according to claim 5 is the method for manufacturing an inner bag for tank containers according to claim 1 or 3. An inner bag (30) having an opening (31) formed at an appropriate position, a pair of flange bodies (34, 34A, 34B) having a flange opening (35, 35A, 35B), and the flange opening ( 35, 35A, 35B) having a larger diameter spacer opening (38), a spacer (37) having a thickness about twice that of the material constituting the inner bag (30) is prepared, and the opening (31) Is welded to the peripheral edge of the flange opening (35, 35A) of one flange body (34, 34A), and then the inner bag (30) and the one flange body (34, 34A) are welded. ) Between the spacer ( 7) and the other flange body (34, 34B) are inserted so that an annular recess (36) is formed between the spacer (37) and both flange bodies (34, 34A, 34B), In the annular recess (36), the peripheral edge of the opening (31) of the inner bag (30) is folded inward so as to overlap the peripheral edge (32) of the opening (31), and the spacer (37 ) And the other flange body (34B) are welded to the one flange body (34, 34A).

Furthermore, in order to solve the third problem, an invention according to a method for mounting an inner bag for a tank container according to claim 6 is characterized in that the inner bag for tank container according to any one of claims 1 to 3 is a tank. A tank container inner bag to be attached to a pouring / ejecting port of a container, which is fixed to a tank wall (11) of the tank container (10) and has a tank flange (13) formed with the pouring / ejecting port (14). ) And the valve flange (52) of the injection / discharge valve (50) attached to the tank flange (13), the peripheral edge of the opening (31) of the inner bag (30) is the opening (31). It is folded inward so as to overlap the peripheral edge (32) of the inner bag (30) and is positioned in the annular recess (36) of the flange (33) of the inner bag (30), and by the tank flange (13) and the valve flange (52). Hold the flange (33) Te, characterized by mounting the bag (30) to the watch outlet (14).
Here, when the flange (33) is sandwiched between the tank flange (13) and the valve flange (52) and the inner bag (30) is attached to the injection / discharge port (14), the invention according to claim 7 is used. Thus, the tank flange (13) and the valve together with the flange (44) of the inner bag (30), together with the flange (33) of the inner bag (30), are arranged on the inlet / outlet (14). It can also be clamped by the flange (52).

  The present invention is basically characterized by the above-described matters, but in the tank of the tank container that accommodates the inner bag according to the present invention, in addition to a manhole where workers enter and exit, liquid cargo And an upper loading port for loading cargo and granular cargo, etc., a safety valve that prevents the pressure difference in the tank from increasing, and a vent valve that introduces air into the tank when discharging the contents in the tank Since these facilities are attached to form an uneven portion on the inner wall surface of the tank, when the inner bag is accommodated in the tank, the outer surface of the inner bag exists on the inner wall surface of the tank. There is a risk that the inner bag may be damaged due to contact with the part. Therefore, in order to prevent damage to the inner bag housed in the tank, a bag breakage prevention material such as urethane foam material is interposed between the inner bag and the uneven portion of the inner wall surface of the tank so that the inner bag is attached to the inner wall surface of the tank. Even when it comes into contact with the concavo-convex portion, the inner bag can be prevented from being damaged.

In addition, the material constituting the inner bag is preferably formed from a flexible synthetic resin film or synthetic resin sheet such as polyethylene or polypropylene, but may be a flexible material. For example, it can be formed from a rubber film such as natural rubber or butyl rubber or a rubber sheet.
For example, when the inner bag is formed from a synthetic resin film or synthetic resin sheet, the inner bag may be formed from a single synthetic resin film or synthetic resin sheet. It is also possible to adopt an inner bag in which a synthetic resin film or a synthetic resin sheet is laminated to form a multilayer structure.

Furthermore, the flange attached to the opening of the inner bag is preferably made of the same material as that constituting the inner bag, but can be formed from different types of materials. At that time, when welding the spacer to the flange body, not only the flange is formed by laminating one spacer on one flange body, but also according to the specifications such as the thickness of the flange and the thickness of the annular recess. It is also possible to form a flange by laminating several spacers on the flange body, one spacer on several flange bodies, or several spacers on several flange bodies.
In addition, when one or several spacers are laminated on several flange bodies to form a flange, one or several spacers are laminated and welded on one or less than several flange bodies, It is also possible to form a flanged body by forming a flanged body with a spacer of a semi-finished product and laminating and welding the remaining flange body with the flanged body with spacer.

According to the invention relating to the inner bag for a tank container according to claim 1, the thickness of the inner bag constituting the inner bag is approximately twice as thick as the periphery of the flange opening of the inner bag flange to be accommodated and mounted in the tank container. The annular recess is recessed with a certain thickness so as to form a step with the flange opening, and the inner periphery of the inner bag is folded back inward so that the periphery of the opening of the inner bag overlaps the periphery of the opening. Since the peripheral edge of the opening of the inner bag is welded to the annular recess , the inner bag can be stored in close contact with the inner wall surface of the tank when the inner bag is attached to the inlet / outlet of the tank. The acting tightening load acts only on the flange, and the inner bag that is folded inward so as to overlap the peripheral edge of the opening does not act on the material itself. Liquid cargo, etc. stored in the inner bag is leaked into the tank due to damage. It becomes possible to reliably prevent that put away.
According to the second aspect of the present invention, it is possible to form an annular recess having a thickness approximately twice that of the material constituting the inner bag by simply forming a step at the periphery of the flange opening of the flange. The shape of the molding die can be simplified, and the cost can be reduced.
According to the third aspect of the present invention, the flange main body in which the flange opening is formed , and the spacer opening is formed, and the spacer having a thickness approximately twice the thickness of the material constituting the inner bag is separately formed. Since the flange having the annular recess can be formed simply by laminating and welding, the shape of the mold for forming the flange is further simplified, and the cost can be further reduced.

According to the invention relating to the method for manufacturing an inner bag for a tank container according to claim 4, when manufacturing the inner bag, an annular recess having a thickness approximately twice as large as the material constituting the inner bag is formed at the periphery of the flange opening. Prepare a flange with a certain thickness so as to form a step with the flange opening, and place it in the annular recess so that the periphery of the opening of the inner bag is folded inward so as to overlap the periphery of the opening In the state where the opening portion of the inner bag is positioned at the flange opening, the inner bag can be accommodated in close contact with the inner wall surface of the tank by simply welding the peripheral edge portion of the opening portion of the inner bag to the annular recess of the flange, It is possible to easily manufacture an inner bag for a tank container that can be stored in a tank container so that liquid cargo or the like stored in the inner bag does not leak into the tank.
According to the invention relating to the method for manufacturing an inner bag for a tank container according to claim 5, the pair of flange main bodies formed with the flange openings and the spacer openings having a larger diameter than the flange openings are formed to constitute the inner bag. Prepare a spacer about twice as thick as the material, and first weld the peripheral edge of the opening of the inner bag to one flange body, then between the inner bag and one flange body, The other flange body is inserted so that an annular recess is formed between the spacer and the pair of flange bodies, and the periphery of the opening of the inner bag overlaps the periphery of the opening in the annular recess. Since the spacer and the other flange main body are welded to the one flange main body, the inner bag can be stored in close contact with the inner wall surface of the tank, and liquid cargo stored in the inner bag can be stored in the tank. Do not leak into Can be accommodated in the tank container to, it is possible to easily manufacture the bag for better tank container in wearability.

According to the invention relating to the tank container inner bag mounting method according to claim 6, between the tank flange fixed to the tank wall of the tank container and the valve flange of the injection / discharge valve mounted to the tank flange. In addition, the inner bag is folded inward so that the peripheral edge of the opening of the inner bag overlaps the peripheral edge of the opening and is positioned in the annular recess of the flange of the inner bag, and the flange of the inner bag is sandwiched between the tank flange and the valve flange, Since the inner bag is attached to the inlet / outlet , the inner bag can be stored in close contact with the inner wall surface of the tank, and the tightening load between the tank flange and the valve flange acts only on the flange of the inner bag, and the annular recess of the flange. The inner bag folded back inward so as to overlap the peripheral edge of the opening located in the inner bag does not act, so the inner bag is damaged and liquid cargo stored in the inner bag is stored in the tank. Leak in So as not to result in, it becomes possible to mount the inner bag in the tank container.
According to the invention relating to the method for mounting the inner bag for a tank container according to claim 7, when mounting the inner bag to the tank container, the inner bag suction preventing body is mounted together, so that the inner bag is stored in the inner bag. When discharging liquid cargo, granular cargo, etc., it is easy to install the suction prevention body functioning so as not to suck the inner bag.

An inner bag for a tank container according to an embodiment of the present invention will be described with reference to FIGS.
First, a tank container will be described with reference to FIG.
A tank container (ISO standard 20-foot tank container) 10 according to FIG. 1 is capable of transporting approximately 20 tons of liquid cargo or granular cargo, and the tank 11 is a tank so that it can be used for rail transport and ship transport. The outer periphery is protected by the holding frame 25, and the tank 11 is fixed to a predetermined position of the tank holding frame 25 via a brace material 26 extending from the tank holding frame 25.
The tank 11 has a manhole 20 opened at an upper portion thereof, and a manhole cover 21 is provided in the manhole 20 so as to be freely opened and closed. Further, an upper loading port (not shown) for loading liquid cargo, granular cargo or the like into the tank is provided at the upper part of the tank 11, and a lid (not shown) is provided at the upper loading port so as to be freely opened and closed. Yes. Furthermore, a safety valve 22 and a vent valve 23 are installed in the upper part of the tank 11.
The safety valve 22 functions as a function for preventing the pressure difference in the tank 11 from increasing, that is, as a pressure adjustment valve. In addition, the vent valve 23 has a function of introducing the atmosphere in order to eliminate the negative pressure generated in the tank 11 when discharging liquid cargo or granular cargo stored in the tank 11.

In addition, a pouring / discharging valve 50 for pouring / dispensing liquid cargo or granular cargo stored in the tank 11 is installed at the lower end of the tank 11. As shown in FIG. 2, the note discharge valve 50 is attached to the tank flange 13 of the tank wall 12 via bolts 15 and nuts 16.
Further, as shown in FIGS. 1 and 2, the tank 11 is configured to accommodate the tank container inner bag 30 according to the embodiment of the present invention, and is accommodated in the tank 11. The bolt 15 and the nut so that the suction preventing body 40 that functions to prevent the inner bag 30 from being sucked into the injection / discharge valve 50 when the liquid cargo or the granular cargo is discharged from the inner bag 30 protrudes from the tank wall 12. 16 is attached.

Next, based on FIG. 4, the 1st form of the inner bag 30 and the flange 33 accommodated in the tank 11 and the method of joining the flange 33 of a 1st form to the inner bag 30 are demonstrated.
The inner bag 30 is formed of a flexible synthetic resin film or synthetic resin sheet such as polyethylene or polypropylene, and is developed along the inner wall surface of the tank 11 as shown in FIG. In this state, it is configured to store about 20 tons of liquid cargo or granular cargo.
The inner bag 30 includes a flange 33 that is used when the opening 31 of the inner bag 30 is sandwiched between the tank flange 13 of the tank wall 12 and the valve flange 52 of the injection / discharge valve 50. .
For example, the flange 33 is made of the same material as that of the inner bag 30. In the first embodiment shown in FIG. 4, a substantially circular flange opening 35 is formed at the substantially center of the flange 33. A ring-shaped recess 36 is formed integrally with the flange 33.
As shown in FIG. 4 (C), the annular recess 36 is larger than the thickness of the material constituting the inner bag 30 (a synthetic resin film or synthetic resin sheet having flexibility such as polyethylene and polypropylene). Although it is formed with a large thickness, as will be described later, when the flange 33 is sandwiched between the tank flange 13 and the valve flange 52, the tightening load acting on the flange 33 causes the peripheral portion 32 of the opening 31. The thickness is set so as not to act on the material constituting the inner bag 30 folded inward so as to overlap, that is, about twice the thickness of the material constituting the inner bag 30.
Moreover, as for the flange 33 of the 1st form shown in FIG. 4, the cyclic | annular recessed part 36 is integrally formed by injection molding, for example.

And in the 1st form shown in FIG. 4, the opening part 31 of the inner bag 30 is formed according to the magnitude | size of the flange opening 35 and the annular recessed part 36 of the flange 33, and the periphery of the opening part 31 of the inner bag 30 is formed. A welding peripheral edge 32 having a predetermined width is formed, and the peripheral edge 32 of the opening 31 of the inner bag 30 is connected to the flange 33 by a heat welding device (not shown) in a state where the peripheral edge 32 is positioned in the annular recess 36 of the flange 33. The flange 33 is formed in the opening 31 of the inner bag 30.
In the first embodiment, the flange 33 has a thickness of 2 mm, the flange 33 has an outer diameter of 158 to 160 mm, the flange opening 35 has an inner diameter of 108 to 110 mm, the annular recess 36 has an inner diameter of 130 mm, and the annular recess 36 has a thickness. Is set to 1 mm, and the thickness of the material constituting the inner bag 30 is set to 0.5 mm or less, but the shape and size of the mounting location of the flange 33 or the liquid cargo or granules to be transported Depending on the type of cargo or the like, the thickness of the material constituting the inner bag 30 and the dimensions of the flange 33 are appropriately changed.
In the first embodiment shown in FIG. 4, the opening 31 of the inner bag 30 is formed in accordance with the sizes of the flange opening 35 and the annular recess 36 of the flange 33, and the periphery of the opening 31 of the inner bag 30 is formed. The welding peripheral edge 32 having a predetermined width is formed. After the sheet-like inner bag 30 is welded to the annular recess 36 of the flange 33, the opening 31 of the inner bag 30 is formed, and the inner bag 30 is placed in the tank 11. When mounting inside, the periphery of the opening 31 of the inner bag 30 may be folded back inward so as to overlap the peripheral edge 32.

Next, based on FIG. 5, the inner bag 30 and the flange 33 which concern on a 2nd form, and the method to join the flange 33 of a 2nd form to the inner bag 30 are demonstrated.
In the 2nd form which concerns on FIG. 5, the inner bag 30 and the flange 33 are comprised from the same raw material as the 1st form which concerns on FIG.
In the second embodiment according to FIG. 5, the flange 33 includes a flange main body 34 in which the flange opening 35 is formed, and a spacer opening 38 having a larger diameter than the flange opening 35. The spacer 37 is made of a spacer 37 having a thickness larger than the thickness, that is, about twice the thickness of the material constituting the inner bag 30 folded inward so as to overlap the peripheral edge 32 of the opening 31. It can be produced by at least two production methods.
First, in the case of the first manufacturing method, as shown in FIG. 5B, a spacer 37 is laminated on the flange main body 34, and both are welded by a welding portion 39 (not shown), A flange 33 having an annular recess 36 having a thickness greater than the thickness of the material constituting the bag 30 is formed.
Next, as shown in FIG. 5C, the opening 31 of the inner bag 30 is formed in accordance with the size of the flange opening 35 and the annular recess 36 of the flange 33, and the periphery of the opening 31 of the inner bag 30 is formed. The peripheral edge 32 of the opening 31 of the inner bag 30 is flanged by a heat welding device (not shown) in a state in which the peripheral edge 32 of welding having a predetermined width is formed and the peripheral edge 32 is positioned in the annular recess 36 of the flange 33. The flange 33 is formed in the opening 31 of the inner bag 30 by welding to the annular recess 36 of the inner bag 30.
Further, in the case of the second manufacturing method, a welding peripheral edge 32 having a predetermined width is formed on the peripheral edge of the opening 31 of the inner bag 30, and the peripheral edge 32 is positioned on the peripheral edge of the flange opening 35 of the flange main body 34. In this state, the peripheral edge 32 of the opening 31 of the inner bag 30 is welded to the peripheral edge of the flange opening 35 of the flange main body 34 by a heat welding device (not shown).
Next, the spacer 37 is sandwiched between the inner bag 30 and the flange main body 34 so that the spacer opening 38 of the spacer 37 surrounds the peripheral edge 32 of the opening 31 of the inner bag 30, and the spacer 37 is moved to the flange main body 34. Laminate to. In this state, the spacer 37 is welded to the flange main body 34 by the welding portion 39 by a heat welding device (not shown).

As described above, the two manufacturing methods for manufacturing the flange 33 according to the second embodiment according to FIG. 5 have been described. As shown in FIG. 5C, the inner bag 30, the flange main body 34, and the spacer 37 are arranged together. In this state, the peripheral edge portion 32 of the opening 31 of the inner bag 30 can be welded to the flange main body 34 and the spacer 37 by a heat welding device (not shown).
In the second embodiment shown in FIG. 5, the opening 31 of the inner bag 30 is formed in accordance with the sizes of the flange opening 35 and the annular recess 36 of the flange 33, and the periphery of the opening 31 of the inner bag 30 is formed. Although the welding peripheral edge portion 32 having a predetermined width is formed, the inner bag 30 is formed after the sheet-like inner bag 30 is welded to the annular recess 36 of the flange 33 or the peripheral edge of the flange opening 35 of the flange main body 34. When the inner bag 30 is mounted in the tank 11, the periphery of the opening 31 of the inner bag 30 may be folded inward so as to overlap the peripheral edge 32.
The dimensions of the material of the flange 33 and the inner bag 30 according to the second embodiment shown in FIG. 5 are shown in FIG. 4 when the flange 33 is formed using one flange body 34 and one spacer 37. Although it is set to the same dimensions as the first embodiment shown, the shape and dimensions of the mounting location of the flange 33, or the type of liquid cargo or granular cargo to be transported, as in the first embodiment shown in FIG. Accordingly, the thickness of the material constituting the inner bag 30 and the dimensions of the flange main body 34 and the spacer 37 constituting the flange 33 are appropriately changed.

Next, based on FIG. 6, the inner bag 30 and the flange 33 which concern on a 3rd form, and the method to join the flange 33 of a 3rd form to the inner bag 30 are demonstrated.
In the 3rd form concerning FIG. 6, the inner bag 30 and the flange 33 are comprised from the same raw material as the 1st and 2nd form concerning FIG.4 and FIG.5.
And in the 3rd form which concerns on FIG. 6, the flange 33 is formed with a pair of flange main bodies 34A and 34B in which the flange openings 35A and 35B are formed, and a spacer opening 38 having a larger diameter than the flange openings 35A and 35B. A spacer 37 having a thickness larger than the thickness of the material constituting the inner bag 30, that is, about twice the thickness of the material constituting the inner bag 30 folded inward so as to overlap the peripheral edge portion 32 of the opening 31. It is composed of
Here, the flange opening 35A of the flange body 34A is formed to have a smaller diameter than the flange opening 35B of the flange body 34B.
And in the 3rd form shown in FIG. 6, the welding peripheral part 32 of predetermined width is formed in the periphery of the opening part 31 of the inner bag 30, and this peripheral part 32 is positioned in the periphery of 35 A of flange opening of the flange main body 34A. In this state, the peripheral edge 32 of the opening 31 of the inner bag 30 is welded to the peripheral edge of the flange opening 35A of the flange main body 34A by a heat welding device (not shown).
Separately, a spacer 37 is provided on the flange main body 34B, and both are welded by a heat welding device (not shown), and the spacer includes an annular recess 36 having a thickness larger than the thickness of the material constituting the inner bag 30. A flange body 34B with 37 is formed.
Next, the flange main body 34B with the spacer 37 is sandwiched between the inner bag 30 and the flange main body 34A so that the spacer 37 is positioned between the two flange main bodies 34A and 34B, and between the two flange main bodies 34A and 34B. An annular recess 36 is formed in the annular recess 36, and the flange body 34B with the spacer 37 is attached to the flange body 34A by folding back the inner periphery of the opening 31 of the inner bag 30 so as to overlap the peripheral edge 32. Laminate to. In this state, the flange main body 34B with the spacer 37 is welded to the flange main body 34A by a heat welding device (not shown).

In the third embodiment shown in FIG. 6, the opening 31 of the inner bag 30 is formed in accordance with the sizes of the flange openings 35A and 35B of the flange main bodies 34A and 34B and the annular recess 36, and the opening 31 of the inner bag 30 is formed. The welding peripheral edge 32 having a predetermined width is formed on the peripheral edge of the inner bag 30, and the opening 31 of the inner bag 30 is formed after the sheet-like inner bag 30 is welded to the peripheral edge of the flange opening 35A of the flange body 34A. Then, the peripheral edge of the opening 31 of the inner bag 30 may be folded back inward so as to overlap the peripheral edge 32.
Here, in the third embodiment shown in FIG. 6, the entire thickness of the flange 33 is set to 3 mm, and the flange main body 34A constituting the flange 33 has a thickness of 1 mm, an outer diameter of 164 mm, and a flange opening. 35A has an inner diameter of 108 mm, the flange body 34B has a thickness of 1 mm and an outer diameter of 164 mm, the flange opening 35B has an inner diameter of 130 mm, and the spacer 37 has a thickness of 1 mm and an outer diameter of 164 mm. The inner diameter of 38 is set to 140 mm.
As a result, the annular recess 36 formed in the flange 33 has an inner diameter of 140 mm and a thickness of 1 mm, and the thickness of the material constituting the inner bag 30 is set to 0.5 mm or less. The thickness of the material constituting the inner bag 30, the flange main bodies 34A and 34B constituting the flange 33, and the spacers according to the shape and size of the mounting position of the container, or the type of liquid cargo or granular cargo to be transported The dimension of 37 is changed suitably.
In the third embodiment shown in FIG. 6, the case where the flange opening 35A of the flange body 34A is formed with a smaller diameter than the flange opening 35B of the flange body 34B has been described. Alternatively, when only 34B is used, the pair of flange bodies can be formed with the same shape, that is, only one of the flange bodies 34A or 34B, thereby further reducing the cost of manufacturing the flange body and thus the flange. Can be made.

Next, a method for attaching the inner bag 30 with the flange 33 to the tank container 10 will be described with reference to FIGS.
First, the inner bag 30 with the flange 33 is taken into the tank 11 from the manhole 20 of the tank container 10 shown in FIG.
Next, the flange 33 of the inner bag 30 is taken out to the outside of the tank 1 from the injection / discharge port 14 formed in the tank flange 13 attached to the tank wall 12.
Then, after inserting the suction preventing body 40 into the flange opening 35 of the flange 33, a plurality of bolts in which a plurality of preventing body flange bolt holes 46 formed in the preventing body flange 44 of the suction preventing body 40 are fixed to the tank flange 13. 15 respectively. In this state, the flange 33 of the inner bag 30 is folded inward so that the peripheral edge of the opening 31 of the inner bag 30 overlaps the peripheral edge 32, and is sandwiched between the tank flange 13 and the prevention body flange 44, Temporarily held.
Next, the plurality of valve flange bolt holes 54 formed in the valve flange 52 of the injection / discharge valve 50 are respectively inserted into the plurality of bolts 15 fixed to the tank flange 13.
Finally, the nut 16 is screwed to each bolt 15, and the work of mounting the inner bag 30, the suction prevention body 40 and the injection / discharge valve 50 to the tank container 10 is completed as shown in FIG. 2.

As shown in FIG. 2, when the suction preventing body 40 is attached to the tank 11, the preventing body frame 41, the cylindrical wall 42, and the preventing body opening 43 formed in the cylindrical wall 42 are provided on the tank wall 12. It is mounted so as to protrude into the tank 11 from the inner surface, and prevents the inner bag 30 from being sucked when discharging the liquid cargo or granular cargo stored in the inner bag 30, so that the prevention body flange opening 45 and the later-described Thus, liquid cargo, granular cargo, etc. can be discharged smoothly through the valve flange opening 53.
In addition, the valve outlet 51 is formed with a valve flange opening 53, and a valve housing 51 including an inlet conduit 55 and an outlet conduit 56 is fixed to the valve flange 52 fastened to the tank flange 13. Is provided with a valve operating lever 58 for opening and closing the cap, and a cap 57 is detachably attached to the outlet conduit 56.

As shown in FIG. 2, the inner bag 30 is accommodated in the tank 11, and the flange 33 of the inner bag 30 is arranged so that the peripheral edge of the opening 31 of the inner bag 30 overlaps the peripheral edge 32. The inner bag 30 is folded inward so that the peripheral edge of the opening 31 overlaps the peripheral edge 32, and the annular shape of the flange 33 is held between the tank flange 13 and the prevention body flange 44. Positioned in the recess 36, the tightening load for tightening the prevention body flange 44 on the tank flange 13 is prevented from acting on the material itself constituting the inner bag 30.
Furthermore, since the inner bag 30 can be mounted so as to come into contact with the inner surface of the tank wall 12 from the inlet / outlet port 14 formed in the tank flange 13, loads such as liquid cargo and granular cargo stored in the inner bag 30 are subjected to the inner bag. 30 does not act on the welded portion between the inner bag 30 and the flange 33, so that the peripheral portion 32 of the opening 31 of the inner bag 30 is peeled off from the flange 33 when the tank container 10 is transported. There is no end.
Further, as shown in FIG. 2, the inner bag 30 can be mounted so as to come into contact with the inner surface of the tank wall 12 from the inlet / outlet port 14 formed in the tank flange 13. When transport cargo such as body cargo is discharged, it can be discharged so that the transport cargo does not remain in the tank 11, that is, the inner bag 30.

  As shown in FIG. 1, in the tank container 10, in addition to the manhole 20, an upper loading port, a safety valve 22, a vent valve 23, and the like (not shown) are installed so as to form an uneven portion protruding into the tank 11. Therefore, when liquid cargo, granular cargo, etc. are stored in the inner bag 30 accommodated in the tank 11 and the tank container 10 is transported, the liquid cargo, granular cargo, etc. swing and the inner bag Since the outer surface of 30 contacts the uneven part protruding into the tank 11 and the inner bag 30 may be damaged, a foamed urethane material or the like is provided between the inner bag 30 and the uneven part protruding into the tank 11. A bag-breaking prevention material 24 may be interposed.

It is a side view of the tank container equipped with the inner bag for tank containers concerning an embodiment of the invention. It is the A section expanded sectional view of FIG. FIG. 3 is an exploded view of FIG. 2. The top view (A) of the flange which concerns on 1st embodiment, sectional drawing (B) along the BB line of FIG. 4 (A), and sectional drawing which shows the state which welded the inner bag to the flange ( C). The top view (A) of the flange which concerns on 2nd embodiment, sectional drawing (B) along CC line of FIG. 5 (A), and sectional drawing which shows the state which welded the inner bag to the flange ( C). The top view (A) of the flange which concerns on 3rd embodiment, sectional drawing (B) along the DD line of FIG. 6 (A), and sectional drawing which shows the state which welded the inner bag to the flange ( C).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Tank container 11 Tank 12 Tank wall 13 Tank flange 14 Pouring outlet 15 Bolt 16 Nut 20 Manhole 21 Manhole cover 22 Safety valve 23 Ventilation valve 24 Bag breaking prevention material 25 Tank holding frame 26 Brace material 30 Inner bag 31 Opening part 32 Peripheral part 33 Flange 34, 34A, 34B Flange body 35, 35A, 35B Flange opening 36 Annular recess 37 Spacer 38 Spacer opening 39 Welding part 40 Suction prevention body 41 Prevention body frame 42 Cylindrical wall 43 Prevention body opening 44 Prevention body flange 45 Prevention body Flange opening 46 Prevention body flange bolt hole 50 Note discharge valve 51 Valve housing 52 Valve flange 53 Valve flange opening 54 Valve flange bolt hole 55 Inlet conduit 56 Outlet conduit 57 Cap 58 Valve control lever

Claims (7)

A tank container inner bag (30) having a flange (33) formed with a flange opening (35, 35A, 35B) connected to a pouring / ejecting port (14) of a tank container (10), the flange At the periphery of the opening (35, 35A, 35B), an annular recess (36) approximately twice the thickness of the material constituting the inner bag (30) is formed with the flange opening (35, 35A, 35B). So that the periphery of the opening (31) of the inner bag (30) overlaps the periphery (32) of the opening (31) in the annular recess (36). to thereby position folded inwardly, the inner bag (30) opening (31) the periphery (32) of the bag tank containers, characterized in that welded to the annular recess (36) of the.   The inner bag for a tank container according to claim 1, wherein the annular recess (36) is formed integrally with the flange (33). The annular recess (36) has a spacer opening (35, 35A, 35B) having a larger diameter than the flange opening (35, 35A, 35B) in the flange body (34, 34A, 34B) in which the flange opening (35, 35A, 35B) is formed. 38) is formed, and is formed by laminating and welding spacers (37) having a thickness approximately twice that of the material constituting the inner bag (30). Inner bag for tank container. It is a manufacturing method of the inner bag for tank containers in any one of Claims 1-3, Comprising: The inner bag (30) in which the opening part (31) was formed in the appropriate place, The pouring outlet of a tank container (10) An annular recess (36) having a thickness about twice that of the material constituting the inner bag (30) is provided at the periphery of the flange opening (35, 35A, 35B) connected to (14). 35A, 35B) and a flange (33) having a constant thickness so as to form a step, and a peripheral edge of the opening (31) of the inner bag (30) is provided in the annular recess (36). Folding inward so as to overlap the peripheral edge (32) of the opening (31), the peripheral edge (32) of the opening (31) is welded to the annular recess (36). A method for manufacturing an inner bag for a tank container. It is a manufacturing method of the inner bag for tank containers of Claim 1 or 3, Comprising: The inner bag (30) in which the opening part (31) was formed in the appropriate place, and the flange opening (35, 35A, 35B) are formed. A pair of flange main bodies (34, 34A, 34B) and a spacer opening (38) larger in diameter than the flange openings (35, 35A, 35B) are formed , and about two of the materials constituting the inner bag (30) are formed. A spacer (37) having a double thickness is prepared, and the peripheral edge (32) of the opening (31) is welded to the peripheral edge of the flange opening (35, 35A) of one flange body (34, 34A). Then, between the inner bag (30) and the one flange body (34, 34A), the spacer (37) and the other flange body (34, 34B) are placed between the spacer (37) and the both flange bodies (34, 34A). Flange body (34, 4A, 34B) annular recess (36) is KyoIri so formed between the opening peripheral edge of the opening (31) of said inner bag into the annular recess (36) (30) (31 And the spacer (37) and the other flange body (34B) are welded to the one flange body (34, 34A). The manufacturing method of the inner bag for tank containers.   A tank container inner bag mounting method for mounting the tank container inner bag according to any one of claims 1 to 3 to a tank container pouring outlet, wherein the tank container inner bag is attached to a tank wall (12) of the tank container (10). The inner bag is fixed between the tank flange (13) fixed and formed with the pouring / discharging port (14) and the valve flange (52) of the pouring / discharging valve (50) attached to the tank flange (13). The peripheral edge of the opening (31) of (30) is folded inward so as to overlap the peripheral edge (32) of the opening (31) to form an annular recess (36) of the flange (33) of the inner bag (30). The inner bag (30) is attached to the pouring / ejecting port (14) with the flange (33) sandwiched between the tank flange (13) and the valve flange (52). Attaching the inner bag for tank containers   The prevention body flange (44) of the suction prevention body (40) disposed in the pouring and discharging port (14) is clamped together with the flange (33) of the inner bag (30). 6. A method for mounting the inner bag for a tank container according to 6.

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