JPS636075Y2 - - Google Patents

Description

[Detailed description of the invention] (Target of the invention/Field of industrial application) The present invention relates to a connecting device for lining sheets in containers, and is used to manufacture corrosion-resistant containers lined to contain chemical solutions, etc. Used in cases etc.

(Prior Art) Conventionally, containers used for chemical solutions such as acids and alkalis have been lined with a sheet made of a synthetic resin such as Teflon (registered trademark) on the inner surface of the container in order to obtain corrosion resistance. This type of container is also used for medicinal solutions containing powerful drugs, since its original purpose is to provide corrosion resistance by lining it.
High reliability is required to prevent any leakage.

In a conventional container, for example, as shown in FIGS. 1 and 2, the main body 1 of the container is made up of a metal cylindrical side plate 2, a disc-shaped lid plate 3, and a cone-shaped bottom plate 4. The surface is lined with a Teflon sheet 5. This sheet 5 is adhered to the side plate 2 etc. with an adhesive so as to cover the inner circumferential surface of the main body 1, but at the joints between the side plate 2, the lid plate 3 and the bottom plate 4, each Since the surfaces intersect with each other at angles, continuous lining is not possible, and therefore, as shown in Figure 2,
The main body 1 is provided with flanges 2a, 4a, and the sheets 5, 5 are formed with brim-shaped ears 5a, 5a,
Flange connection is performed by a large number of bolts and nuts 6.

In this conventional container structure, although it is possible to achieve a temporary sealing structure by tightening the bolt/nut 6, the ear 5
It is difficult to say that it is a completely sealed structure since there is a risk that the bolts (a) may become loose, the bolts/nuts (6) may become loose, etc. In addition, in a container with this structure, the flanges 2a, 4
The production and installation of the lugs 5a, the production of the ears 5a, 5a, and the connection and assembly work using the bolts and nuts 6 require a lot of materials and labor, and are expensive.

It is also possible to consider a structure in which the bottom plate 4 and the side plate 2 are welded together, and the sheets 5 and 5 are butted against each other and welded on the joint, without adopting the flange joint structure as described above, but in this structure, the strength of the welded part is is weak and unreliable, and cannot withstand actual use. Also,
When the bottom 4 is formed into a dish shape with a smooth curved surface and is welded to the side plate 2 to be integrated, it is necessary to adhere a large number of chrysanthemum-shaped sheets 5 to the main body and then weld the sheets between each sheet. The current situation is that as the number of welded parts increases, the strength of the lining decreases, leading to a decrease in reliability.In addition, the construction of the lining requires a lot of labor and there is a lot of material loss in the sheet. be.

(Purpose of the invention) This invention was made in view of the above circumstances.
To provide a connecting device for a lining sheet, which can be integrally manufactured without using a flange connection structure for the main body, has strong lining strength and high reliability, and allows easy construction of the lining.

(Structure of the invention) The present invention provides a container in which a metal main body is lined with a sheet made of synthetic resin, and a plurality of sheets are bonded to each other within the main body. At the joint formed by the two intersecting surfaces, an auxiliary plate covering the joint is fixed to the two opposing sides of the auxiliary plate, and each end of the plurality of sheets is are butted against each other on the surface of the auxiliary plate, a V-shaped groove is formed between the butted ends, and a welding material is overlay-welded in this V-shaped groove, and the butted ends of each other are welded together. It is characterized in that a tape-shaped welding material is welded between the parts and along both ends thereof.

(Example) In FIGS. 3 and 4, the main body 7 of the container is
The cylindrical side plate 8 and the cone-shaped bottom plate 9 are made of metal materials such as carbon steel and stainless steel, and their respective ends are butted and welded to form the side plate 8 and the bottom plate 9.
A joint 10 is formed around the entire circumference, where the two intersect at an angle. An annular auxiliary plate 11 made of the same metal material as the main body 7 has its two longitudinal sides 11a, 11a welded to the side plate 8 or the bottom plate 9, respectively, and covers the joint 10 over its entire circumference. . Sheet 12,1 made of Teflon
3 are respectively bonded to the side plate 8 and the bottom plate 9 with an adhesive, and the peripheral edge portions of each are bonded to cover the auxiliary plate 11 as well, and the end portions 12
a and 13a are formed in a V-shape and are butted near the center of the auxiliary plate 11. sheet 1
In order to cover the sheets 2 and 13 on the auxiliary plate 11, it is sufficient to heat the ends of the sheets 12 and 13.

Both end portions 12a and 13a are connected by heat welding over the entire circumference with a welding material 14 made of PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin). To explain an example of the process of thermal welding using the welding material 14, in FIG. 5, first, a welding material 14a made of PFA in the shape of a round bar with a diameter of about 3 mm is applied between both ends 12a and 13a (FIG. 5A), Next, this welding material 14a is heated and overlay welded between both ends 12a and 13a (Fig. 5B), and then welding material 14b made of tape-shaped PFA with a width of about 10 mm is applied from above. (Fig. 5C), by heating and pressing both welding materials 14a,
14b is heat welded at the same time (FIG. 5D).

According to the above-described embodiment, the side plate 8 and the bottom plate 9 of the main body 7 are joined by welding, which is stronger than flange connection, and there is no risk of loosening of bolts and nuts. Both ends of the sheets 12 and 13 are connected to each other on the surface of the auxiliary plate 11 by overlay welding, and are thermally welded using a highly reliable tape-shaped welding material 14b, so the strength is strong. Reliability is extremely high. In addition, since the lining does not have to be shaped like a chrysanthemum, the strength of the lining does not decrease, the lining is easy to construct, and there is less material loss and the cost is low. The auxiliary plate 11 is connected to the joint part 10
It also serves as reinforcement, increasing the strength of the main body and improving reliability. This is particularly advantageous in pressure vessels.

In the above embodiment, inexpensive Teflon was used for the sheets 12 and 13, and PFA, which is expensive but has excellent weldability, was used for the welding material 14, but the combination of these may be selected as appropriate depending on the purpose of use. , various other materials such as vinyl chloride, nylon, urethane, etc. can be used.

In the above-described embodiment, the auxiliary plate 11 has a straight cross section, but it may have a smooth rounded shape that becomes convex toward the joint 10, or the side plate 8.
Alternatively, a member having a triangular cross section that is in contact with the inner surface of the bottom plate 9 may be used.

In the above embodiment, an example was described in which the present invention was implemented at the joint 10 between the side plate 8 and the bottom plate 9, but the present invention is not limited to this location. For example, it can be applied to the joints between the side plate 8 and the lid, between the side plates when the side plate 8 is in the shape of a polygonal prism, or between a manhole projecting into the interior of the main body 7, a reinforcing plate, etc., and the main body 7. Further, it is also possible to perform the process only on a part of such a large number of joints.

(Effects of the invention) According to the invention, the main body can be manufactured integrally without using a flange joint structure, the lining can have strong strength and high reliability, and the lining can be easily installed. can. Therefore, the degree of freedom in designing the shape of the container increases,
Various types of highly reliable lined containers can be manufactured at low cost.

In particular, in the present invention, each end of a plurality of sheets to be joined into the main body is butted against each other on the auxiliary plate, and a V-shaped groove is formed between the butted ends. The tensile strength between the sheets is increased by overlaying the welding material in the grooves, and the sheets are joined by welding a tape-shaped welding agent with a large welding area and tensile strength on top of this. In addition to dramatically increasing the strength of the parts, there is no fear of liquid leakage, and reliability can be significantly improved.

[Brief explanation of the drawing]

Figure 1 is an outline drawing showing an example of a conventional container;
The figure is an enlarged cross-sectional view of the joint in Figure 1, Figures 3 to 5 show embodiments of the present invention, Figure 3 is a partial cross-sectional view similar to Figure 2, and Figure 4 is a partial cross-sectional view similar to Figure 2. 3 is an enlarged view of the main part, and FIGS. 5A to 5D are explanatory diagrams showing an example of the welding process. 7...Main body, 8...Side plate (surface), 9...Bottom plate (surface), 10...Joint portion, 11...Auxiliary plate, 12,
13... sheet, 12a, 13a... end of sheet, 14a, 14b... welding material.

Claims (1)

[Scope of utility model registration request] In a container formed by lining a metal body with a sheet made of synthetic resin and bonding a plurality of sheets to each other within the body, the container is formed by two surfaces intersecting each other at an angle within the body. An auxiliary plate that covers the joint is fixed to the two opposing sides of the auxiliary plate, and each end of the plurality of sheets is attached to each other on the surface of the auxiliary plate. At the same time, a V-shaped groove is formed between the butted ends, and this V-shaped groove is formed between the butted ends.
A connection of a lining sheet, characterized in that a welding material is overlay welded to the character-shaped groove, and a tape-shaped welding material is welded between the butt ends and along both of these ends. Device.