JPH0110534Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a cover device for sealing a wall pipe penetration part.

In particular, this idea was originally applied for in 1983-
This was done to improve the device described in No. 158580.

The above-mentioned sealing cover device for a wall piping penetration part is made by overlapping both ends of a sealing sheet curved into a cylindrical shape in the shape of palms together, and applying magic tape (registered trademark), sealing adhesive, double-sided adhesive, etc. After joining with three joints of adhesive tape, both cylinder openings of the cylindrical sheet are tightened and fixed to the sleeve pipe opening and the pipe part of the piping. Only the two cylinder openings of the wrapped sheet are fixed to the sleeve and piping part, and the overlapped part in the middle, excluding the overlapped part of both cylinder openings, is usually not in close contact with the body of the cylindrical sheet. It was found that when internal pressure was applied, the middle folded palm-shaped part stood up and spread the sealing cylindrical sheet to both sides, which resulted in a weak point in pressure resistance. Furthermore, in the above-mentioned sealing cover device, the overlapped portions of the cylindrical sheets are fixed using Magic Tape (registered trademark) and double-sided adhesive tape in the initial stage until the sealing adhesive hardens. Since it was fixed on the surface of the base material, it was found that there was also a problem in the fixing force of the overlapped part of the palms in the initial stage. In particular, when the purpose is to seal gaps between pipes and through holes (walls, ceilings, floors, etc.) that penetrate each building and each room within a nuclear power plant, leakage of radiation or radiation-contaminated air may occur. Since this has a significant impact on the human body, highly reliable seals are required.

This invention improves the drawbacks of the conventional sealing cover device described above, improves the pressure resistance of the overlapped portion of the sealing sheet curved into a cylindrical shape, and improves the initial fixing strength of the overlapped portion of the sealing sheet. This was done with the aim of improving.

Hereinafter, this invention will be explained in detail based on drawings showing an example of its implementation.

In the drawings, 1 is a construction wall, 2 is a sleeve embedded in a pipe penetration part of the construction wall, 3 is a pipe, and 4 is a sealing sheet. The sealing sheet 4 is made of a flexible material that is impermeable to gases and liquids, such as rubber imprinted on a woven fabric made of inorganic or organic fibers, or aluminum foil pasted on the woven fabric. etc. are used. This sealing sheet 4 is attached to the sleeve 2 and piping 3.
It is fixed with a tightening band 7 via buffer gaskets 5 and 6.

The sealing sheet 4 is curved into a cylindrical shape, and the overlapped portions 4a and 4b of both ends thereof are overlapped in the shape of palms together, and a first joint portion is formed by a sealing adhesive 8 applied to the overlapped surfaces. ing.
Further, the overlapping parts 4a and 4b are provided with staples 9 of a staple type fastener to prevent the overlapping parts from moving and shifting until the sealing adhesive hardens. It has been strengthened. Clasp 9 of the stapler type fastener
It is only necessary to fasten the overlapping parts 4a, 4b of the sealing sheet 4 at several points parallel to the edges, and even after the sealing adhesive has hardened, the overlapped parts 4a,
It has the function of preventing displacement and peeling of 4b.

Overlapping portion 4 of the sealing sheet 4
On the surface of one side portion 4b of a, 4b, one stop piece 10 of a separable stop consisting of a hook member and a loop member, called Magic Tape (registered trademark), is sewn in advance by a sewing machine. On the other hand, in the trunk portion of the cylindrical sheet 4, when the folded palm-shaped overlapping portions 4a, 4b are folded to one side, the stopper piece 10 of the overlapping portion is overlapped with the above-mentioned one. The other stop piece 11 of the stop is sewn on beforehand, and these stop pieces 10, 11 form a second joint. Note that it is preferable to apply a sealing adhesive to the inner surface of the torso where the stopper piece 11 is sewn to prevent fluid from leaking from the sewing needle hole.

The part extending between the tip surface and the trunk surface of the palm-shaped overlapping parts 4a and 4b that are folded down toward the trunk of the cylindrical sheet and connected to the trunk by a magic tape (registered trademark) type stopper is , a sealing adhesive 12 is applied.

As described above, both ends of the sealing sheet 4 wrapped in a cylindrical shape are overlapped in the shape of palms together, and the overlapping portions 4a and 4b are firmly bonded with adhesive, and the overlapping portions 4a and 4b are connected to the cylinder. According to the configuration in which the sheet is folded down onto the body of the shaped sheet, and the overlapped portion on the folded side is connected to the body with a fastener such as Magic Tape (registered trademark), the sealing sheet 4 is attached to both cylinder openings. Not only the overlapped portion, but also the intermediate overlapped portion other than the overlapped portion of both cylinder openings is joined to the body of the sealing cylindrical sheet, so that the entire sealing sheet is firmly held in a cylindrical shape. Therefore, it has an excellent effect of preventing the intermediate overlapping portion from rising or spreading due to the action of internal pressure, and has significantly higher pressure resistance than the conventional sealing cover device described above.

In addition, in the above embodiment, the first joint part that integrally joins the overlapping parts 4a and 4b of the sealing sheet 4 is formed only with a sealing adhesive, but a double-sided adhesive tape and a double-sided adhesive tape are also used. A magic tape (registered trademark) type stopper may be used in combination. In addition, a magic tape (registered trademark) type fastener is used in the second joint part that joins the overlapping part of the palms to the body surface of the cylindrical sheet, and this joint part can also be applied with sealing adhesive or with double-sided adhesive. A combination of tape and Magic Tape (registered trademark) type fastener may be used.

As described above, according to this invention, a cylindrical shape is formed between the pipe opening of the sleeve fitted into the through hole of the pipe penetration part of the construction wall and the pipe section of the pipe passing through it. A sealing cover device comprising a sealing sheet wrapped around the sleeve, and both cylindrical openings of the cylindrical sealing sheet being fixed to the tube mouth portion of the sleeve and the pipe portion of the piping with tightening members, wherein the sealing sheet is The overlapped portions of both ends are overlapped in the shape of palms together, and a first joint portion is formed at the overlapped surface portion, and this overlapped portion is folded to one side, and the overlapped portion on the folded side and the cylinder are formed. Since the second bonding part is formed between the body of the sealing sheet, the pressure resistance of the sealing sheet wrapped in a cylinder shape and the initial fixing force of the overlapped part of the sealing sheet are greatly increased. can be achieved. Therefore, it is particularly suitable for construction in places such as nuclear power plant facilities where highly reliable sealing of gaps between pipes penetrating each building and each room in the building and through-holes in walls, ceilings, floors, etc. is required. It is suitable for

Furthermore, in narrow spaces where the installation interval between sealing sheets is shorter than the width of the sheet due to the shape of the piping, piping supports, or the presence of flow meters connected to the pipe section, a cylindrically curved sheet may be used. The sheets are compressed and distorted in the direction of the cylinder axis (width direction of the sheet) and stacked together, but when stacked in such a state, the temporary fixing is likely to come off, and the adhesive bonding is insufficient and peels off. However, it is suitable for use in such places.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a sealing cover device for a pipe penetration part of a constructed wall, showing one embodiment of this invention;
The figure is a perspective view of a sealing sheet curved into a cylindrical shape with its ends overlapped, and FIG. 3 is an enlarged sectional view of the overlapping portion of the sheet ends. 1...Construction wall, 2...Sleeve, 3...Piping,
4...Sealing sheet, 4a, 4b...Passed palm-shaped overlapping portion, 5, 6...Buffer gasket, 7...
...Tightening band, 8...Sealing adhesive, 9...
Fastener, 10, 11... Magic tape stopper piece, 12... Adhesive for sealing.

Claims (1)

[Scope of utility model registration request] A sealing sheet wrapped in a cylindrical shape is used to cover the space between the pipe opening of the sleeve fitted into the through hole of the pipe penetration part of the construction wall and the pipe section of the pipe passing through it, and the cylindrical shape In a sealing cover device in which both cylindrical openings of a sealing sheet are fixed to a pipe opening portion of the sleeve and a pipe portion of a pipe using a tightening member, the overlapping portions of both ends of the sealing sheet are overlapped in the shape of palms together, The first
A joint part is formed, this overlapping part is folded to one side, and a second joint part is formed between the overlapping part on the folded side and the trunk of the sealing sheet. A cover device for sealing wall piping penetrations.