JPS597268Y2 - Entrance/exit in liquid tank - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of the entrance and exit in a liquid tank.

It is already known that liquid vessels such as tanks are made of iron or resin.

However, not only iron, but also resin easily conducts heat, so if it is necessary to maintain a constant temperature of the liquid in the tank, it is necessary to reduce the thermal conductivity of the tank wall. .

In response to this need, attempts have been made to attach a heat insulating material to the tank wall and cover the exposed surface with the same material as the original tank wall.

In this case, a material with high liquid resistance was used as the original tank wall material, but since the heat insulating material does not come into direct contact with the liquid, a material with low liquid resistance was often used.

In addition, when storing corrosive liquids such as salt water and acids in iron liquid tanks, a liquid-resistant resin coating was applied to the iron surface.

In this way, the tank wall was constructed of a board made of two or more materials (hereinafter referred to as a composite board), and the inner layer of the composite board was made of a non-liquid resistant material, and the outer layer was made of a liquid resistant material. A liquid tank was created.

Such liquid tanks typically have a liquid supply or outlet (
Hereinafter, these are collectively referred to as entrances and exits).

However, when a hole is drilled in the tank wall to provide an entrance/exit, the non-liquid resistant layer is exposed on the surface of the hole, and the non-liquid resistant layer is eroded from the exposed surface.

Therefore, in order to prevent this, a liquid-resistant resin was manually applied to the exposed surface.

However, manually applying the resin into the holes is extremely complicated and has the drawback that the next operation cannot be carried out until the applied resin has hardened.

This invention was made to improve the above-mentioned drawbacks.

The inventor thought of covering the inner surface of the hole with a cylindrical packing and leaving the inner surface of the cylindrical packing exposed.

However, if the packing is only cylindrical, corrosive liquid will enter the back side of the packing and corrode the non-liquid resistant material inside the partition wall.

Therefore, an attempt was made to use a cylindrical packing with flanges attached to both ends.

A packing with such a structure is disclosed in Utility Model Publication No. 49-50646.
It is publicly known as described in the publication No.

In this publication, a hole is made in the wall of the bathtub, the above-mentioned packing is passed through the hole, and the collar is pressed against the bath wall using the flange of an externally threaded flange pipe and a tightening nut.

However, when this method is applied to large-diameter entrances and exits, such as the entrances and exits of large liquid tanks, the tightening force is insufficient when tightening with nuts, so liquid can enter behind the packing, causing the inner layer of the partition wall to could not prevent non-liquid-resistant materials from being eroded.

Therefore, we decided to make the flange wider, provide a bolt insertion hole in the flange, and use the bolt to press the packing flange around the hole.

However, if the packing flange was made wide enough to allow the bolt 1 through hole to be provided in the packing flange, it was feared that it would be difficult to pass the packing through the hole.

However, it has been found that such concerns are not a problem if a flexible material is used for the packing and the overall thickness is made thin.

In addition, when a bolt is passed through the tank wall, there is a risk of liquid leaking around the bolt, but this leakage can be prevented by making the space between the bolt and the hard plate airtight by abutting a hard plate against the collar. I found out that I can get it.

This invention was made based on such knowledge.

In other words, this invention provides a large liquid tank in which the tank wall is made of a composite plate, the inner layer of the composite plate is made of a non-liquid resistant material, and the outer layer is made of a liquid resistant material. A hole is drilled in the wall, a cylindrical packing is inserted into the hole, the cylindrical packing has a structure in which flanges are integrally provided at both ends of the cylindrical part, and the flange is wide enough to accommodate bolt insertion holes. sandwich the tank wall with the cylinders, cover the inner surface of the hole in the tank wall with the cylindrical part of the packing, and expose the inner surface of the cylindrical part.
This is an entrance/exit for a liquid tank, in which donut-shaped hard plates are brought into contact with the outer surfaces of the flanges, bolts are passed through the hard plates, the flanges, and the tank wall, and the space between the hard plates and the bolts is airtight.

The inlet and outlet of the liquid tank of this invention will be explained as follows based on the drawings.

FIG. 1 is a partially cutaway sectional view showing an example of the inlet/outlet in the liquid tank of this invention.

FIG. 2 is a partially cutaway perspective view showing an example of the cylindrical packing used in this invention.

3 to 7 are cross-sectional views showing another example of the cylindrical packing used in this invention.

8 to 13 are partially cutaway sectional views showing another example of the inlet/outlet in the liquid tank of this invention.

In FIG. 1, a tank wall 1 is constructed of composite plates.

As a composite board, the inner layer 11 is made of non-liquid resistant material, for example, the inner layer 11 is made of iron and the outer layer 12 is made of coating resin, or the inner layer 11 is made of plywood or urethane foam and the outer layer 12 is made of fiber-reinforced thermosetting resin. The outer layer 12 is made of a liquid-resistant material.

In addition, the inner layer 11 may be made of a heat insulating material sandwiched between iron plates, and the outer layer 12 may be made of a coating resin, and the whole may be composed of five layers.

Further, the tank wall 1 may be either a side wall or a bottom wall.

A hole 2 is bored in the tank wall 1, and a cylindrical packing 3A is inserted into the hole 2.

As shown in FIG. 2, the cylindrical packing 3A has flanges 3 at both ends.
1 is provided integrally.

A bolt insertion hole 32 is bored in the collar 31.

It is desirable that a ring-shaped projection 33 is provided on the bolt insertion hole 32 and the flange surface around the central cylindrical portion.

The collar 31 of the cylindrical packing 3A is as shown in FIG.
It is in contact with both sides of the tank wall 1.

The inner surface of the hole 2 is covered with the cylindrical portion of the packing 3A, and the inner surface of the cylindrical portion is exposed.

The donut-shaped hard plate 4 is in contact with the exposed surface of the collar 31.

A short pipe 42 may be attached around the hole 41 of the hard plate 4.

The hard plate 4 can be made of stainless steel or hard vinyl chloride resin, for example.

A bolt 5 passes through the hard plate 4, the collar 31, and the tank wall 1.

The head 51 of the bolt 5 is coated with a liquid-resistant material 52 (eg, plastic or rubber).

Moreover, the liquid-resistant material 52 has flexibility and makes the space between the hard plate 4 and the bolt 5 airtight.

It is desirable that the ring-shaped protrusion 54 be provided on the surface of the liquid-resistant material 52 facing the foot 53 side.

A nut 7 is fastened to the leg 53 of the bolt via a washer 6.

Thereby, the hard plate 4 is pressed toward the tank wall 1.

In this way, the tank wall 1 is provided with an entrance/exit.

A tube 8 is connected to the short tube 42 of the hard plate 4.

Instead of the cylindrical packing 3A in FIG. 1 or 2 above,
Cylindrical packings 3B to 3F shown in Figures 3 to 7
can be used.

The cylindrical packing 3B in Fig. 3 is the cylindrical packing 3B in Fig. 2.
In A, the ring-shaped protrusion 33 is not provided.

The cylindrical packing 3C in Fig. 4 is the cylindrical packing 3C in Fig. 3.
In B, the collars 31 are deflected in a direction in which they approach each other as they approach the periphery.

The cylindrical packing 3D in Fig. 5 is the cylindrical packing 3D in Fig. 2.
In A, the ring-shaped protrusion 33 is provided only around the cylindrical portion.

The cylindrical packings 3E and 3F shown in FIGS. 6 and 7 are the cylindrical packings 3B and 3A shown in FIGS. 3 and 2, respectively, with one collar 31 narrowed in width.

Both have the advantage that they can be easily inserted into the hole 2.

These cylindrical packings can be made of, for example, ethylene propylene rubber, polyvinyl chloride foam, natural rubber, or the like.

What is shown in FIG. 1 is a typical example of the inlet and outlet of the liquid tank of this invention.

This idea also includes some modifications.

For example, in the entrance/exit of the liquid tank of this invention shown in FIG. 8, 3F shown in FIG. 7 is used as the cylindrical packing.

On the narrower side of the collar 31 of the cylindrical packing 3F, a flexible material 9 such as caulking material (for example, silicone) is filled between the tank wall 1 and the hard plate 4.

In addition, FIG. 8 shows an example in which the pipes 8 are connected to both sides of the entrance and exit.

Further, at the entrance/exit of the liquid tank of this invention shown in FIG. 9, 3B shown in FIG. 3 is used as a cylindrical packing.

A donut-shaped hard plate 10 is placed on one surface of this cylindrical packing 3B.
is in contact with the tank wall 1 from the inside.

The donut-shaped hard plate 10 can be made of metal, thermoplastic resin, or the like.

A hard plate 4 is in contact with the opposite surface of the hard plate 10 and the outer wall surface of the liquid tank, respectively.

Bolt} 5A (This bolt is a stud bolt with threads cut on both ends of the nine rods.

) penetrates the hard plate 10 and is hermetically welded to the hard plate 10 at the penetrating position.

Bolt 5A requires two or more to be attached, and the bolt h
5A is preferably arranged at equal intervals surrounding the center of the hard plate 10.

The legs 53 of the bolt 5A protruding to the outside of the liquid tank are connected to the tank wall 1,
It penetrates the cylindrical packing 3B and the hard plate 4, a washer 6 is fitted from its tip, and a nut 7 is tightened.

A leg 53 protruding inside the liquid tank passes through the hard plate 4, a washer 6 is fitted from the tip thereof, and a nut 7 is tightened.

Further, a screw 43 is cut into a hole in the center of the hard plate 4, and a threaded part 81 cut in the tube 8 is inserted into this screw 43.
A tube 8 is connected.

Next, at the entrance/exit of the liquid tank of this invention shown in FIG. 10, a hard plate 10 is brought into contact with the inside of the liquid tank.

A bolt 5A welded to the hard plate 10 passes through the cylindrical packing 3B, the tank wall 1 and the hard plate 4, a washer 6 is fitted from its tip, and a nut 7 is tightened.

At the entrance/exit of the liquid tank of this invention shown in FIG. 11, a hard plate 10 is brought into contact with the outside of the tank wall 1, which corresponds to the lid of the liquid tank.

In addition, in FIG. 11, the tank wall 1 is made by combining unit plates 1A.

The unit board 1A includes a substrate 1 on the four peripheries of a right-angled substrate 13.
A slanted joining edge 14 is provided which is inclined at an angle of 135° with respect to 3, and an upright joining edge 15 is provided beyond the inclined joining edge 14.

In the tank wall corresponding to the side wall, in the portion where the unit plates 1A are connected perpendicularly to each other, the inclined joint edges 14 are in contact with each other, and in the portion where they are connected on the same plane, the upright joint edges 15 are in contact with each other. and are connected with bolts and nuts (not shown).

In addition, at the connection part between the tank wall 1 that corresponds to the lid and the tank wall 1 that corresponds to the side wall, the upright joint edge 15 of the unit plate 1A of the tank wall 1 that corresponds to the side wall and the upright joint edge 15 of the unit plate 1A of the lid intersect at right angles. An angle 40 is abutted from the outside and connected with bolts and nuts (not shown).

At the inlet/outlet of the liquid tank of this invention shown in FIG. , has a taper on the inner surface.

The tube 8 has a taper 82 on the outer surface of one end, and this tapered surface is inserted into the short tube 42 and connected.

At the entrance/exit of the liquid tank of this invention shown in FIG. 13, a hard plate 4 is brought into contact with a collar 31 of a cylindrical packing exposed inside the tank wall 1.

The tip of the presser 20 is brought into contact with the outer surface of the hard plate 4, and the base of the presser 20 is tightened and fixed toward the tank wall 1 with the bolt 5C and nut 7A, thereby holding the hard plate 4 in place. It is fixed to the collar 31.

The presser 20 can be made of stainless steel, hard vinyl chloride resin, or the like.

Further, a packing 30 is inserted between the presser 20 and the tank wall 1.

This packing 30 is desirably made of a flexible, liquid-resistant material.

The bolt 5B passes through the presser 20, the two hard plates 4', the cylindrical packing 3B, and the tank wall 1, a washer 6 is fitted from its tip, and a nut 7 is tightened.

It is desirable to use stainless steel bolts as the bolts 5B and 5C.

In that case, a packing is interposed between the head 55 of the bolt 5B and the hard plate, or the head 55 and the hard plate 4 are welded as shown.

The inlet/outlet of the liquid tank of this invention has a structure in which a cylindrical packing is inserted into the hole, a flange is integrally provided at both ends of the cylindrical part, and the flange is wide enough to accommodate a bolt insertion hole, Since the tank wall was sandwiched between the flanges and hard plates were pressed from both sides of the flanges, the cross section of the tank wall inside the hole was completely covered with the packing, and the inner surface of the cylindrical part of the packing was exposed inside the hole.

Therefore, the non-liquid resistant material forming the inner layer of the tank wall will not be attacked by contact with the liquid.

Further, since bolts were used to tighten the flange with the hard plate, construction is easy, and extra time such as waiting for curing when applying resin is not required.

Therefore, the inlet/outlet in the liquid tank of this invention can be easily installed by on-site construction.

Furthermore, since the space between the hard plate and the bolt is made airtight, leakage of liquid from around the bolt is also prevented.

Moreover, when the inlet/outlet in the liquid tank of this invention is no longer needed, it can be easily removed.

The inlet/outlet in the liquid tank of this invention has the above-mentioned advantages.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view showing an example of an inlet/outlet in a liquid tank of this invention, FIG. 2 is a partially cutaway perspective view showing an example of a cylindrical packing used in this invention, and FIGS. The figure is a sectional view showing another example of the cylindrical packing used in this invention, and FIGS. 8 to 13 are partially cutaway sectional views showing other examples of the entrance and exit in the liquid tank of this invention. In each country, 1 is the tank wall, 1A is the unit plate, 2 is the hole, 3A
or 3F is a cylindrical packing, 4 is a hard plate, 5, 5A, 5
B and 5C are bolts, 6 is a washer, 7 and 7A are nuts, 8 is a tube, 9 is a flexible material, 10 is a hard plate, 11 is an inner layer, 12 is an outer layer, 13 is a substrate, 14 is an inclined joint edge, 15 is a Upright joint edge, 20 is a presser, 30 is a packing, 31 is a collar, 32 is a bolt insertion hole, 33 is a ring-shaped projection, 40 is an angle, 41 is a hole, 42 is a short tube, 51 and 55 are bolt heads, 52 is a liquid-resistant material, 53 is a foot, 54 is a ring-shaped projection, 81 is a threaded portion, and 82 is a taper.

Claims (1)

[Scope of utility model registration request] In a large liquid tank where the tank wall is made of a composite plate, the inner layer of the composite plate is made of a non-liquid resistant material, and the outer layer is made of a liquid resistant material, holes are drilled in the tank wall. Then, a cylindrical packing is inserted into the hole, and the cylindrical packing has a structure in which flanges are integrally provided at both ends of the cylindrical part.The flange is wide enough to accommodate bolt insertion holes, and the tank wall of the flange is sandwiched between the flanges. , while covering the inner surface of the hole in the tank wall with the cylindrical portion of the packing, exposing the inner surface of the cylindrical portion, a doughnut-shaped hard plate is brought into contact with the outer surface of the collar, and a bolt is passed through the hard plate, the collar, and the tank wall. , an entrance/exit in a liquid tank with an airtight space between a hard plate and a bolt.