JP2000179693A - Packing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water leakage from the periphery of a bolt used for connection, not to mention a flange part of piping. SOLUTION: Packing material held between a passage bored in a water tank wall, and a flange part of piping, has a center hole part 2 formed in almost the same shape as the inner diameter of piping, bolt hole parts 3 formed around the center hole part 2, corresponding to bolt holes formed in the flange part, and peripheral ribs 4, 5 formed surrounding the center hole part 2 and bolt hole parts 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a packing material used for connecting pipes provided in a water tank such as a water receiving tank, an elevated water tank, and an emergency fire extinguishing tank.

[0002]

2. Description of the Related Art The structure of piping connected to the above-mentioned water tank is as follows.
Usually, a flange is formed at the end, which surrounds the flow path formed on the wall of the water tank with this flange, inserts packing material between them, and fixes the gap between the flange and the wall of the water tank with bolts and nuts. General. During this work,
Usually, it is considered that the water passing through the pipe does not leak from the water tank wall and the flange part.Therefore, the structure of the packing material used is also between the water tank wall and the pipe flange part. The technology was in a direction that would eliminate water leakage.

[0003] Normally, a packing material made of a rubber elastic body having a plane shape substantially the same as that of the flange portion is used, and is fixed with bolts and nuts between the water tank wall and the water tank wall. For this reason, although it has been improved in a direction that can prevent water leakage from between the flow path in which the water tank wall is formed and the flange portion of the pipe, the point that water in the water tank from other parts leaks out of the water tank is described. This cannot be improved.

That is, the connection between the water tank wall and the flange portion of the pipe is made by aligning a bolt hole formed around the flow passage with a bolt hole formed in the flange, and fixed by bolts and nuts penetrating the water tank wall. However, the water in the water tank may leak to the outside from around the bolt, but no countermeasure is usually taken for this.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is possible to prevent water leakage not only from a flange portion of a pipe but also from around a bolt used for connection. The packing material is provided.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is a packing material sandwiched between a perforated flow path in a water tank wall and a flange portion of a pipe, wherein the packing material has substantially the same shape as the inner diameter of the pipe. And a bolt hole is formed around the central hole corresponding to the bolt hole formed in the flange portion, and a peripheral rib is formed so as to surround the central hole and the bolt hole. The peripheral rib is a rib that independently surrounds the central hole and the bolt hole, respectively.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The packing material of the present invention has the above-mentioned structure, and it is possible to prevent water from leaking from a flow path through which water in a water tank passes, and to provide a bolt for connecting a pipe to the water tank. Because of the surrounding ribs, water leakage from this portion can be prevented. Such a circumferential rib usually surrounds the central hole and the bolt hole separately, but in some cases, it is also possible to surround these two simultaneously with one circumferential groove. As the packing material used, rubber or resin foam material is used. And the size of the packing material corresponds to the size of the flange portion in a front view, and the thickness of the packing material is about 2 to 5 mm,
The height of the circumferential rib is preferably about 1 to 2 mm.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a front view of the packing material of the present invention, and FIG.
FIG. 2 is a sectional view taken along line AA in FIG. 1. In the drawing, reference numeral 1 denotes a packing material, a central hole 2 having substantially the same shape as the inner diameter of the pipe is formed, and four bolt holes 3 around the central hole 2.
Are formed. Further, peripheral ribs 4 and 5 are formed so as to surround the center hole 2 and the bolt hole 3 respectively. EPDM rubber was used as the packing material used here. The thickness of the packing material 1 is 3 mm,
Was 1 mm in height.

FIG. 3 shows a structure in which a pipe is fixed to a water tank wall using the packing material 1 described above. In the figure, the lower half shows the structure after the pipe is fixed, and the upper half shows the relationship between the members before fixing the pipe.
Reference numeral 10 denotes a water tank wall. The left side shows the inside of the water tank, and the right side shows the outside of the water tank. A channel 11 having substantially the same shape as the inner diameter of the pipe is provided in the water tank wall 10, and a bolt hole 1
Two (four places) are formed.

The packing material 1 shown in FIG. 1 is disposed inside and outside of the water tank wall 10, and pipes 21 and 31 are disposed with the packing material 1 interposed therebetween, and the flange portions 22 and 32 of the pipes 21 and 31 are formed. It faces the packing material 1. Bolt holes 23, 33 are formed in the flange portions 22, 32,
The bolt holes 23 and 33 coincide with the bolt hole 3 of the packing material 1 and the bolt hole 12 of the water tank 10, and usually a bolt 41 is inserted from inside the water tank and a nut 42 is screwed from the outside of the water tank. It is fixed. In the figure, 43
Is a washer. In some cases, an optional packing material may be interposed between the washer 43 and the flange portions 22 and 32.

In the present invention, a bolt 41 and a nut 42
The circumferential ribs 4, 5 become flanged portions 22, 3
2 does not cause water leakage due to being pressed against the periphery of the flow path 11 and the bolt hole 12 of the water tank wall 10, and particularly, the prevention of water leakage from around the bolt 41 which has conventionally been a problem. Is a major feature.

In this embodiment, the pipe 21 is also provided inside the water tank, but the present invention is not limited to this. In some cases, as shown in FIG. It is needless to say that the camera may be equipped with.

[0013]

The packing material of the present invention has the above-mentioned structure, and the water in the water tank does not leak to the outside, and the occurrence of water leakage can be reduced even in the event of an earthquake, for example. .

[Brief description of the drawings]

FIG. 1 is a front view of a packing material used for a water tank piping according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 shows a fixing structure of a water tank and piping using the packing material of the present invention.

FIG. 4 shows a second example of the fixing structure of the present invention.

[Explanation of symbols]

 1 ‥ packing material, 2 ‥ central hole, 3 ‥ bolt hole, 4, 5 ‥ circumferential rib, 10 ‥ water tank wall, 11 ‥ hole with the same shape as pipe, 12 ‥ bolt hole, 21, 31 ‥ pipe, 22, 32 ‥ flange, 23, 33 ‥ flange bolt holes, 41 ‥ bolt, 42 ‥ nut, 43 ‥ washer.

Claims (2)

[Claims] 1. A packing material sandwiched between a perforated flow path of a water tank wall and a flange portion of a pipe, wherein the packing material has a central hole having substantially the same shape as the inner diameter of the pipe, A packing material, wherein a bolt hole is formed in the periphery of the bolt hole corresponding to the bolt hole formed in the flange portion, and a peripheral rib is formed so as to surround the central hole portion and the bolt hole portion. 2. The packing material according to claim 1, wherein the peripheral rib is a rib that independently surrounds the central hole and the bolt hole.