JPH04113152A - Coupling sealing device for exhaust air duct - Google Patents

Abstract

PURPOSE:To obtain satisfactory and long time sealing performance by allowing a nonwoven felt-like gasket sheet comprising inorganic fiber and kapok fiber tangled and dispersedly mixed with the inorganic fiber to be clamped between a pair of flanges joined on the end of a exhaust air duct. CONSTITUTION:A gasket sheet 8 clamped between coupled flanges 4 is adapted to surround the outer peripheral side of an end of an exhaust duct 1 and seals the coupled section airtightly. In the porous gasket sheet 8, though clamped under pressure, an oily substance which adheres to and penetrates into the gasket, is absorbed by kapok fiber and expands volumetrically between the coupled flanges 4, which serves to seal the coupled section tightly. This construction makes it possible to provide highly endurable and airtight sealing performance against high temperature exhaust gas which contains most severe oily substances to the coupled section and satisfy general purpose service requirements to the coupled sections applicable to various kinds of exhaust air ducts including this kind of exhaust air.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an exhaust duct installed in a building for exhausting air, and particularly to a sealing device for a joint of this exhaust duct.

[Conventional technology]

This type of exhaust duct generally has a hollow cross section such as a rectangular or circular shape and is about 1 m long, and is connected to each other, for example, in the space between the upper floor slab and the ceiling, so as to communicate from the range foot to the outdoors. It is installed in a hanging manner and is used to guide and discharge indoor exhaust outdoors.

To connect the exhaust ducts, for example, a method is adopted in which vertically projecting surrounding flanges are provided at the ends of the ducts, and the mutually opposing flanges of each duct are fastened with bolts and nuts. At this time, the connecting portions are sealed. To do this, asbestos sheets were traditionally used as packing between the flanges, but in recent years neoprene rubber packing has been used instead to prevent asbestos from leaking. The joints shall be sealed with adhesive tape as necessary.

[Problem to be solved by invention]

However, when discharging the exhaust gas from the range foot as described above, the exhaust gas itself contains oil and other components from cooking and is extremely hot, so the connection part of the exhaust duct is also exposed to this exhaust gas. Therefore, the packing made of neoprene rubber tends to deteriorate, and it is difficult to sufficiently seal the connection portion over a long period of time.

If the packing deteriorates, the oil or other fluids attached to the packing or its vicinity may leak, falling onto the back of the ceiling and causing oil stains on the ceiling surface. Become.

- On the other hand, for this predicted packing deterioration,
It is virtually impossible to carry out maintenance such as replacing the packing, but it is virtually impossible to carry out such maintenance after finishing the interior.Therefore, sealing of joints using this type of neoprene rubber packing is not recommended in exhaust ducts. is not necessarily appropriate.

The present invention has been made in view of these problems, and its object is to provide an exhaust duct connection sealing device that can provide sufficient sealing over a long period of time.

[Means to solve the problem]

In accordance with the above object, the present invention discloses water-repellent and oil-absorbing kapok fibers used alone or in combination with other fibers for recovering marine oil spills, as disclosed in Japanese Patent Publication No. 53-47313. and other fibers dispersed therein, and the packing is sandwiched and pressure-inserted between the flanges of the exhaust duct, between the overlapping parts of the ducts, or between the overlapping parts of the connecting member and the duct. In other words, the present invention provides a method in which a non-woven felt-like packing comprising inorganic fibers and kapok fibers intertwined and dispersed therewith is sandwiched between opposing flanges fastened at the end of an exhaust duct. A device for sealing a connecting part of an exhaust duct (Claim 1), characterized in that it is interposed and made of kapok fiber or other fibers in place of the felt-like powkink of Claim 1. An exhaust duct connecting part sealing device (Claim 2), characterized in that it is formed by using a cone-like bunkink having a dispersing device and whose surface is covered with an oil-permeable sheet material (Claim 2), and Claim 1 Item or claim 2
An exhaust duct connecting part sealing device characterized in that it is used between connecting flanges or between duct overlapping parts as described in Claim 3, and is used between a fitting or fitted connecting member and an overlapping part of the duct (Claim No. 3)
2), and these are the gist of the invention as a means of solving the above object.

In addition, in the present invention, the exhaust duct includes an elbow that is located between these parts and changes the direction, and the flange includes an elbow provided by fixing a separate member such as an L-shaped steel, and This term is used to include a veneer with a rising shape or a U-shape formed integrally by processing or the like.

(Function) In the present invention, the joint between the packing and the exhaust duct which is sandwiched under pressure is tightly sealed, and the kapok fibers of the packing may be contained in the exhaust gas adhering to the packing. Absorbs oil.

At this time, it is true that kapok fiber has the ability to expand in volume by about 30 times due to oil absorption, that is, by absorbing oil, the packing can be improved or The sealing performance of the connecting portion improves over time even when the cooker foot or the like is evacuated.

〔Example〕

In FIGS. 1 to 4, l is an exhaust duct for exhausting a range foot having a rectangular hollow cross section and is constructed using a two-shim method, and 2a and 2b are base portions 3 provided at the ends of the exhaust duct 1.1, respectively. and an upright L-shaped steel having a connecting flange 4; 5 is a regent with the base 3 fixed to the exhaust duct 1; 6 is a fastening hole provided in the quick-connect flange 4; 7 is the connecting flange 4 through the fastening hole 6; 4 is shown. On the other hand, 8 is a packing, and in this example, this packing 8 is composed of long glass fibers as inorganic fibers and kapok & fiber (Luku material) containing 10 kapok fibers.
~20wt% and 80~95wt% of glass m-length fibers are mixed, and by applying needle bunching to this, these fibers are intertwined with each other to form a bony felt-like material with a thickness of about 1cI11. be.

In this example, the packing 8 is further bonded to the adhesive layer ll and fixed to the adhesive tape 10, and the packing 8 is provided with bolts at positions corresponding to the spacing between the bolts and nuts 7 so as to penetrate through the release paper 12 on the back side. A through hole 9 is then bored.

As shown, the packing 8 includes the above-mentioned mesh 2a,
It is located between the opposing connecting flanges 4.4 in 2b and is clamped thereto.

That is, after peeling off the aged release paper 12 of the adhesive tape 1O, and in this example, positioning and adhering the packings 8 to the connecting flanges 4 on one side of the mesh 2a in a surrounding manner, then attaching them to the side of the other mesh 2b. The connecting flanges 4 are arranged opposite to this, and the packing 8 is interposed between the flanges 4 and 4, and the bolts and nuts 7 passing through the opposing fastening holes 6 of each connecting flange 4 and the through holes 9 of the packing 8 are used to fasten the flanges. 4, 4 are firmly fastened together, and the interposed packing 8 is also compressed by these connecting flanges 4.4.

The packing 8 sandwiched between the connecting flanges 4 and 4 in this way surrounds the outer circumferential side of the end of the exhaust duct 1 to tightly seal the connecting part, and also maintains a porous shape even though it is compressed. In the packed packing 8, the kapok fiber absorbs the oil that adheres to it and penetrates inside, and as described in the action column, expands in volume between the connecting flanges 4 and 4, thereby making the connecting part tighter. It ends up being sealed.

On the other hand, in FIGS. 5 and 6, 20 is a hollow exhaust spiral duct having a circular cross section, and 21 is provided with a rift 22 in the center, and fitting portions 23a and 23 are partitioned by the rift 22.
24 is a fitting joint material made of a deformed pipe that is fitted to the end of the duct 20 and screwed with a screw 28, 24 is a receiving groove carved on the outer periphery of the fitting portions 23a and 23b, 25 shows the packing that is inserted and glued into this receiving groove 24.

The packing 25 in this example is, for example,
It is a sandwich-like structure having a flat cross section with a thickness of about 3 IIm, and is covered with a cylindrical covering material 27 with Kapok M fiber 26 as a core material. The covering material 27 is made of glass cloth, which is non-drying and oil-permeable, that is, allows adhering oil to penetrate therethrough.

In this example, the packing 25 is fitted in advance into the receiving groove 24 of the joint material 21 and fixed by gluing, or the joint material 21 is fitted to the end of each duct 20, and the screws 281 are fixed. By connecting them together, the packing 25 is sandwiched between the overlapping portion of the joint material 21 and the duct 20, and as in the previous example, the kapok m fiber 26 absorbs oil and expands in volume. This seals the connection more tightly.

Furthermore, in FIG. 7, 30 is a hollow exhaust seam duct having a circular cross section, and 31 is a seam duct for exhaust, for example, 60 at one end of each duct 30.
A fitting connection part provided in a step-widening shape over a length of mm, 32
3 is a receiving groove carved on the outer periphery of the other end of each duct 30;
3 indicates a screw provided to prevent the duct 30 from coming off.

In this example, the sandwich-shaped packing 25 is inserted into the receiving groove 32 and adhered to the fitting connection part 31 as in the fifth @ above.
By fitting the other end and connecting with the screw 33, the packing 25 is similarly interposed between the overlapping portions of the duct 30.

The illustrated example is as shown in E below, and the kapok fibers of the present invention are used alone or in combination with other aerogenous or organic fibers. Which one of these should be used and how to set the mixture ratio are determined by taking into account conditions such as exhaust temperature, necessity of non-combustibility, and packing thickness.

In general, it is convenient to configure it as a non-combustible packing or to be able to cope with the exhaust temperature in a general way.
Asbestos, scrub wool, etc. can be used. In addition, when using a noncombustible material, use 95 wt % or more of an airless material.

Kapok fiber or a fiber mixed therewith is particularly suitable for claim 1.
It is generally advisable to take the above-mentioned intertwining measures in the case of items of the same name, but for that purpose, it is preferable to use items with as long as possible. Intertwining can be done simply and efficiently by mechanical means or by the above-mentioned needle punch.

In addition, is it possible to use monofilament with the material in claim 2?If the felt-like material in claim 1 is to be used, for example, it is necessary to take care not to affect the kapok fiber. It is also possible to use a low-temperature to room-temperature curing resin as a coach ink to maintain the felt state.

The covering material used for the packing according to claim 2 is also the above-mentioned tihm.
It would be possible to think in the same way as above, or it would be possible to use glass vapor as the noncombustible material.

Is it sufficient to sandwich the packing between the connecting flanges, between the overlapping parts of the duct, or between the overlapping parts of the joint material and the duct?Is it possible to fix or hold the packing in advance or to make it easier to connect the ducts? be. Fixing or holding can be done by adhesive tape, adhesive, or mechanical means.For example, when using a bolt as mentioned above, when using a bolt, it is possible to fix it by using an adhesive tape, an adhesive, or a mechanical means. It is also possible to make a cut that extends all the way through, so that the bolt can be held in a hook shape.

Furthermore, in the third aspect, a joint material may be used, or the joint material may be one that fits into the duct or one that fits these.

The cross-sectional shape of the duct according to the present invention may be any suitable shape, and regardless of the cross-sectional shape, at least the lower surface side of the duct should be packed according to the present invention. However, other packings can be appropriately used in combination with other packings except for the lower surface side where there is less possibility of oil leakage, and it is not possible to always use the above-mentioned packings over the entire circumference.

In addition, as long as there is a possibility of oil leakage, for example, the base of the L-shaped steel and the outer periphery of the duct in Figure 4 should be
It is also possible to additionally apply pressure to the packing.

As described above, in the present invention, the different materials, shapes, structures, dimensions, etc. of the para-kinks, exhaust ducts, and these communication means may be variously changed without departing from the gist of the invention. [Effects of the Invention] With the present invention configured as described above, the present invention can be applied to the connecting flanges, between the overlapping parts of the duct, or between the overlapping parts of the joint material to be fitted or fitted and the duct. Packing that is pressurized between the gas and gas cylinders itself seals these, and if the exhaust gas contains oil, the kapok fibers of the packing absorb the adhering oil and expand in volume. This ensures a tight seal over time and prevents oil from leaking and falling onto the ceiling surface, contaminating the surface.

Therefore, the exhaust duct connection sealing device of the present invention has a durable sealing performance even against high-temperature exhaust containing oil, which is the most severe for the connection, and therefore has a durable sealing performance against various types of exhaust including this type of exhaust. It can be used for general purposes in connecting parts of exhaust ducts.

[Brief explanation of the drawing]

The drawings show an embodiment, and Fig. 1 is an exploded perspective view of the connecting part of the exhaust duct, Fig. 2 is a partially enlarged perspective view of the para kink, Fig. 3 is a vertical cross-sectional view of the para kink, and Fig. 4 is an exhaust duct. Partially enlarged vertical cross-sectional view of the connecting part of the duct, No. 5
FIG. 6 is a partially enlarged perspective view of a para-kink according to another example, and FIGS. 6 and 7 are partially cutaway side views of a connecting portion of an exhaust duct according to another example. 1.20) O...Exhaust duct 21...Joint material 4...Connection flange 26...Kapok mu
825...Bellakink

Claims (3)

[Claims] (1) Felt-like packing made of kapok fiber or a mixture of kapok fiber and other fibers is sandwiched between connecting flanges at the end of the exhaust duct or between duct overlapping parts. Exhaust duct joint sealing device. (2) Instead of the felt-like packing according to claim 1, it is a sandwich-like packing having kapok fiber or a mixture thereof with other fibers and whose surface is covered with an oil-permeable coating material. Exhaust duct joint sealing device. (3) An exhaust duct characterized in that the exhaust duct is located between the overlapping parts of the duct and the fitting or fitted joint material instead of between the connecting flanges or the overlapping parts of the ducts as set forth in claim 1 or claim 2. Connection sealing device.