JPH1030813A - Exhaust pipe of drain-collecting type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an exhaust pipe of drain-collecting type which makes it possible to collect (discharging) drain and prevent leakage of the exhaust gas and effect the improvement at low cost and in a simple manner. SOLUTION: A case-shaped exhaust body 10 has in the upper part an exhaust inlet pipe 16 and an exhaust outlet pipe 18 which communicate, under this exhaust body a drain receptacle 24, and normally-closed valve means 26 which releases the drain collecting in the drain receptacle in a manner of collecting the drain outside under the control by the drain inself. This normally-closed valve means comprises a globular float 30 and a water-discharging pipe 28, the float usually closing the upper open end 28a of the water-discharging pipe 28 airtightly. When the drain causes the float to rise, the drain flows out into the water-discharging pipe through a gap formed above the open end 28a and is collected. After the outflow of the drain, the float resumes its place at the upper open end 28a of the water-discharging pipe to close it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust stack for a combustion apparatus, and more particularly to a drain recovery type exhaust pipe.

[0002]

2. Description of the Related Art Conventional exhaust systems for combustion equipment include a natural exhaust system (CF type device) and a forced exhaust system (FE type device).
And a forced supply / exhaust type (FF type device). C
F-type equipment uses combustion exhaust gas only with the draft force of the exhaust,
Since the exhaust pipe is of a type that discharges outdoors, it is required that an exhaust pipe of an exhaust system to be attached is extended in a vertical direction. Meanwhile, FE
Since the type equipment discharges the combustion exhaust gas to the outside using the power of the exhaust fan, the exhaust pipe has a greater degree of freedom in the mounting direction of the exhaust pipe than the CF type. In these types of combustion equipment, drain (condensed water) accumulates or adheres to the exhaust pipe.

[0003] Regardless of the type of equipment, the generation of this drain is usually caused by the following causes, and the amount of generation is also different.

Ability of Combustion Equipment In a combustion equipment, the amount of steam generated varies depending on the type and amount of fuel (expressed as an input in the case of gas equipment).

External temperature When the external temperature decreases, the amount of saturated water vapor decreases, and the remainder condenses and accumulates as drain. However, even if the outside temperature is low,
If the length of the exhaust pipe is short, the exhaust can be discharged outside without being cooled, so that no drain is generated.

If the length of the exhaust pipe is long, the exhaust of the equipment main body becomes difficult to emit, the thermal efficiency inside the equipment increases, and the exhaust temperature decreases, causing drainage. In addition, when the exhaust pipe is long, the exhaust temperature is reduced due to heat radiation of the exhaust pipe, so that drain is generated.

The presence or absence of heat insulating material The heat insulating material attached to the exhaust pipe also has a function of preventing heat radiation of the exhaust pipe. If no heat insulating material is installed, the heat of the exhaust pipe lowers the exhaust gas temperature and generates drain.

[0008]

If such a drain accumulates in the middle of the exhaust pipe, it may hinder the exhaust of the exhaust gas. If the drain is left undisturbed, for example, the drain may move to the equipment side. Backflow may cause equipment failure or corrosion,
In addition, the drain has clogged the pipe or leaked out of the pipe to cause contamination of the ceiling.

Further, as an exhaust pipe (also referred to as an exhaust pipe) for discharging the exhaust gas of the conventional combustion equipment, there are a T-shaped pipe and a 90 ° elbow (curved pipe) specified by JIS standards (JIS S). 2080 (established on October 1, 1994: published by the Japan Standards Association).

In the structure of the T-shaped tube, a hole is formed at the bottom and the drain is discharged from the hole, so that the drain can be discharged. However, after draining,
Exhaust gas leaks out. Further, the curved pipe has a structure that is bent 90 ° by bellows processing, but cannot discharge drain, but has a structure in which exhaust gas can be prevented from leaking because it has airtightness.

[0011] Furthermore, if the improvement work of the supply and exhaust deficiency is performed in a single collecting duct or the like, an enormous construction cost is required depending on the condition of the building. Particularly in a cold region, it is necessary to install a combustion device indoors in order to avoid freezing of the device body. For this reason, the exhaust pipe is required to be able to discharge drain and to have airtightness in the entire exhaust pipe system. However, a conventional T-shaped pipe or curved pipe cannot satisfy both conditions described above. However, in order to satisfy both of these conditions, the structure becomes complicated and the exhaust pipe becomes expensive, so there is a case where the supply and exhaust deficiency cannot be improved. There is a problem.

As described above, conventionally, there has been no exhaust pipe capable of easily improving the exhaust pipe of a combustion device with insufficient supply and exhaust at low cost and at the same time. There has been no exhaust pipe having a structure capable of discharging the drain which may be generated and preventing the exhaust gas from leaking.

[0013] Therefore, conventionally, the collection (discharge) of drain
It is possible to prevent exhaust gas leakage,
The emergence of a drain recovery type exhaust pipe was desired.

[0014] In addition, there has been a demand for a drain recovery type exhaust pipe which can easily and simply improve an exhaust pipe of a combustion device having insufficient supply and exhaust at low cost.

The inventor of the present application has conducted various experiments and studies and, as a result, has come to invent a drain recovery type exhaust pipe having a novel structure, which has been conventionally required.

[0016]

The structure of a drain recovery type exhaust pipe according to the present invention is characterized by having the following constitutional requirements. That is, a cylindrical exhaust pipe main body, which connects the exhaust inlet pipe and the exhaust outlet pipe provided at a position higher than the exhaust inlet pipe, is provided in the exhaust pipe main body below the position of the exhaust inlet pipe. And a normally closed valve means provided in the drain reservoir and opened by the drain to discharge the drain to the outside of the exhaust pipe main body.

According to this structure, the exhaust pipe of the present invention is installed at a place where the drain is accumulated in the exhaust pipe path of the combustion equipment, so that the drain is formed from the exhaust inlet pipe or the exhaust outlet pipe to the cylindrical exhaust pipe. Flows and accumulates in the drain reservoir of the main body. When a certain amount of drain accumulates, the drain can open the normally closed valve means to allow the drain to flow out (ie, to collect) outside the exhaust pipe main body. Since the normally closed valve means is released only by the drain, there is no possibility that the exhaust gas leaks outside from the normally closed valve means.

Further, preferably, the drain reservoir is constituted by a lower portion including a bottom wall at a vertically lower portion inside the exhaust pipe main body, and the normally closed valve means penetrates the bottom wall in a vertical direction. A drain pipe projecting from the inside of the exhaust pipe body to the outside,
It is preferable that the drainage pipe be configured to include a floating means (also referred to as a float) disposed at the open end of the exhaust pipe main body so as to normally close the open end.

With this configuration, the drain collects in the lower portion including the bottom of the exhaust pipe main body, and when the drain collects, the floating means closing the open end of the drain pipe of the normally closed valve means moves upward by the drain. It lifts up, so that the open end is released and the drain flows into the drainpipe. Further, when the drain surface is lowered due to the outflow of the drain, the floating means also comes down to the opening end and closes it. In this case,
The projecting length of the drain pipe into the exhaust pipe main body is preferably as short as possible. However, in order to prevent the function of the exhaust pipe from deteriorating, it is preferable to set a suitable projection length according to the design so that unnecessary residues such as dust are accumulated in the drain reservoir and are not discharged from the drain pipe.

Preferably, the floating means is a spherical body formed of a material floating on the drain. Assuming that the spherical body is a spherical body, when the floating means descends to the open end of the drain pipe, even if any surface of the spherical body comes into contact with the open end, the open end is surely closed (closed). can do. For this reason, after drainage of the drain from the drainage pipe, that is, after recovery, the drainage pipe is sealed, so that no exhaust gas leaks.

Further, the floating means is provided with a rod-like body extending vertically downward in the drainage pipe, and a stopper means for limiting the floating of the floating means is mounted on the inner wall of the exhaust pipe main body. It is preferable to keep it.

According to this structure, even if the floating means rises due to the drain, the floating means reaches the stopper means and does not rise higher than the stopper means before the rod body comes out of the drain pipe. it can.
In addition, when the drain is reduced by the outflow, the floating means is lowered, but since the rod is in the drain pipe, the floating means is guided by the rod and the floating means is securely returned to the opening end of the drain pipe. This can be reliably sealed.

Further, by providing this rod-shaped body,
During transportation of the drain recovery type exhaust pipe, it is possible to prevent the floating means from dropping from the drain pipe.

Further, the drainage pipe has an outer open end formed by U
Preferably it is connected to a trap.

With this configuration, even in the event that exhaust gas leaks from the opening of the drain pipe on the side of the exhaust pipe main body, a U trap is provided at the tip of the drain pipe to which it leaks. Therefore, leakage of exhaust gas can be stopped by this U trap.

Further, in the case of a drain recovery type exhaust pipe in which the exhaust inlet pipe and the exhaust outlet pipe are provided on the peripheral wall of the exhaust pipe main body, preferably, a backflow preventing means is provided at the outlet of the exhaust inlet pipe inside the exhaust pipe main body. It is good to provide.

With this configuration, the exhaust gas may flow backward from the exhaust pipe top of the exhaust pipe to the combustion equipment side due to the back wind pressure and leak into the room. However, when the back wind pressure is generated, the exhaust inlet pipe is provided by the back flow prevention means. To prevent exhaust gas from flowing back into the room.

In the case of a drain recovery type exhaust pipe in which the exhaust outlet pipe is provided on the ceiling wall of the exhaust pipe main body, it is preferable that the exhaust outlet pipe is protruded into the exhaust pipe main body to provide a flange portion. It is.

With this configuration, when the exhaust vertical pipe is extended from the exhaust outlet pipe and the extension distance becomes long, the exhaust is cooled and becomes drain. This drain can travel efficiently through the inside of the exhaust vertical pipe, from the exhaust outlet pipe to the drain reservoir in the exhaust pipe main body through this flange, so that it can drip efficiently. It can be prevented from flowing to the combustion equipment side.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The figures schematically show the shapes, sizes, and arrangements of the components so that the present invention can be understood. In addition, it should be understood that the present invention is not limited only to the embodiments described below.

FIG. 1 is a view showing an example of an embodiment of a drain recovery type exhaust pipe according to the present invention. FIG. 1 (A) is a perspective view of an assembled appearance, and FIG. 1 (B) is a view (A). FIG.

According to the structure of the present invention, the exhaust pipe main body 10
Is basically a cylindrical body having a peripheral wall 20, a ceiling wall 12, and a bottom wall 14. Normally, this cylindrical body is formed into an integral structure by combining the peripheral wall 20, the ceiling wall 12, and the bottom wall 14, but the present invention does not matter how to form the cylindrical body. The exhaust pipe body 10 has an exhaust inlet pipe 16 and an exhaust outlet pipe 18.
And are linked together. An exhaust inlet pipe 16 is connected to the upper part of the peripheral wall 20 of the exhaust pipe main body 10 by joining these joints in an airtight manner, and the exhaust outlet pipe is located at a position higher than the exhaust inlet pipe 16 on the peripheral wall or ceiling. Tube 18
Are connected by hermetically joining these joints.
The exhaust inlet pipe 16 can be hermetically connected to an exhaust pipe (not shown) of the combustion equipment at an open end opposite to the main body. Also,
An open end of the exhaust outlet pipe opposite to the main body side can be airtightly connected to an extended exhaust pipe (not shown). The airtightness at this connection is determined by the exhaust pipe 1 according to JIS S 2080.
When air at a pressure of 0.12 KPS is continuously sent per connection for one minute, the amount of leakage is set to 1 m ³ / h or less.

In the structure shown in FIGS. 1A and 1B,
Preferably, the exhaust outlet pipe 18 is attached to the ceiling wall 12 of the main body 10 in the vertical direction so as to communicate with the inside of the main body 10, and its lower opening end 18a is protruded into the cylindrical portion of the main body so as to be connected thereto. The protruding portion constitutes the collar portion 22.

A drain reservoir 24 is provided at a lower portion in the vertical direction inside the exhaust pipe main body 10 and including a bottom wall (or a bottom portion) 14 thereof. The drain reservoir (also referred to as drain reservoir) 24 is provided at a position lower than the exhaust pipe inlet 16 so that the drain does not flow backward from the exhaust inlet pipe to the combustion equipment side. As the name implies, the drain reservoir 24 is configured to store a small amount of drain at the bottom of the main body 10. It is dust, garbage,
This is to prevent the function of the exhaust pipe of the present invention from deteriorating by employing a structure in which unnecessary residues such as deposits accumulate on the bottom wall 14. In addition, a take-out port that can be opened and closed and sealable may be provided at an appropriate location of the exhaust pipe so that the unnecessary residue can be removed when accumulated to some extent.

The normally closed valve means 2 for releasing the drain released by the drain accumulated in the drain reservoir 24.
6 is provided. This normally closed valve means 26 is provided at a position where the drain does not flow backward from the exhaust inlet pipe to the combustion equipment side,
Preferably, the drainage pipe 28 and the floating means 30 are used. The drain pipe 28 extends from the inside of the main body 10 to the bottom wall 1.
4 is provided so as to penetrate in the vertical direction and protrude to the outside.
Floating means (float) 30 is disposed at the open end 28a so as to normally close a. The floating means 30 is made of a material floating on the drain. And this floating means 3
Numeral 0 is located above the drain pipe 28 and has a function of preventing exhaust leakage. Also, when the floating means 30 rises when condensed water of the exhaust, that is, the drain is accumulated in the drain reservoir 24, water is discharged. A gap is formed between the drain pipe 28 and the floating means 30, and a drain pipe for collecting drain (not shown).
It is a means to lead to.

Preferably, the floating means 30 is formed as a spherical body. In this case, it is preferable to form the spherical body into a hermetically sealed structure in which a gas having a specific gravity lower than that of a drain such as air is sealed inside, for example, as a spherical balloon. However, the floating means 30 floats on the drain, but is configured to be fixed at the opening end 28a of the drainage pipe 28 by its own weight when the drain is removed. When the floating means 30 is fixed at the open end 28a, the exhaust gas flows from the drain end 28a through the open end 28a.
The opening means 28a is configured to be air-tightly closed by the floating means 30 so as not to leak into the inside of the housing. Therefore, it is preferable to form the pipe end face of the open end 28a of the drainage pipe 28 in accordance with the curvature of the surface of the sphere so that the two are tightly joined without any gap.

An airtightness test was performed by closing the drainage pipe 28 when the spherical floating means 30 was used.
Leakage at a pressure of 10 mm H ₂ 0 was 0.4 liters / min. Since the leakage amount is about 1/50 of the JIS standard, it can be understood that the safety is high.

Preferably, the floating means 30 is provided with a rod 32 extending vertically downward in the drainage pipe 28, and a stopper is provided on the inner wall side of the peripheral wall 20 of the exhaust pipe main body 10. Means 34, for example, a plate-shaped stopper may be provided. The stopper means 34 is provided, for example, at a position vertically lower than the position of the exhaust inlet pipe 16, and together with the rod-shaped body 32, when the float 30 is lifted by the drain, the float 30 is connected to the drain pipe. 28 and the float 30 without falling off from the internal open end 28a.
It acts so that there is a gap between them. This float 30
In order to prevent the float 30 from dropping from the drain pipe 28 when the float 30 floats due to vibration or shock during the movement of the exhaust pipe of the present invention, The position and distance of the float 30 and the length of the rod 32 attached to the lower portion of the float 30 are adjusted so that the float 30 is always at a fixed position. Further, the rod-shaped body 32 has a role of a weight and plays a role of controlling a posture when the float 30 floats.

Preferably, a U trap 40 is airtightly connected to the lower opening end of the drainage pipe 28 so as to communicate the two. The U trap 40 may have a structure commonly used in a vanity table or the like. In this case, the discharged drain is once trapped by the U trap 40, and when the discharged drain amount is larger than the trap capacity, the U
It is discharged from the trap 40 to the outside. The reason for providing the U trap 40 is that even if the exhaust gas leaks out of the drain pipe 28, this gas is prevented from leaking to the outside by the water seal in the U trap, and a double safety This is for the sake of sex. The water seal of this U trap 40 is 30 mmH
₂ 0 or more and then, it can prevent leakage of exhaust if possible ensure its state from the fan performance and gas consumption of a combustion device connected to the exhaust pipe of the present invention. One of the features of the U trap 40 is that if water is injected into the trap during installation and construction, the float 30 functions as a lid, so that even if the temperature of the exhaust pipe of the present invention rises, water is prevented from evaporating. Can be done.

The entire drain recovery type exhaust pipe of the present invention described above is preferably formed, for example, according to the standards of JISS 2080. And the material used is SUS30
4 or a material having corrosion resistance equal to or higher than that, the exhaust pipe of the present invention also uses a material based on this standard. Therefore, flammable materials such as resin are not suitable for the exhaust pipe of the present invention.

The drain recovery type exhaust pipe according to the present invention is suitable to be attached to a combustion apparatus having a combustion exhaust temperature of 260 ° C. or lower. In this case, the separation distance from the combustible must be at least 1/2 of the exhaust pipe diameter according to the provisions of the Fire Service Law. In compliance with such standards, the drain recovery type exhaust pipe of the present invention is used by hermetically connecting the exhaust inlet pipe 16 to the exhaust pipe from the combustion equipment, while connecting the exhaust outlet pipe 18 airtightly to the top of the exhaust pipe. . Condensed water or drain generated in each exhaust pipe during use flows through the inside of the exhaust inlet pipe 16 and the exhaust outlet pipe 18 and drips into the exhaust pipe main body 10. In the case of the exhaust outlet pipe,
The brim portion 22 drips down without going around the connection portion with the main body 10 or the inner surface of the peripheral wall of the main body. These dripped drains accumulate in the drain sump 24 at the lower part of the exhaust pipe main body 10,
When the water level of the drain rises above the upper opening end 28a of the drainage pipe 28, the float 30 fixed at the opening end 28a floats by this drain, and the float 30 and the opening end 2
8a. Drain flows into the drain tube 28 through this gap and is collected.

A large amount of drain is discharged from the exhaust pipe main body 10.
Even in the case where a large amount of drain flows into the drain reservoir 24 and flows into the drain reservoir 24, the upper limit position of the floating of the float 30 is defined by the stopper plate 34 so that the float does not fall off. Rod 3
Since 2 is in the drainage pipe 28, the float 30 is controlled in attitude and does not float above a predetermined height.
No failure occurs in the normally closed valve means.

As the drain is discharged, the rod 32
By the weight of the float 30, the float 30 is guided by the leading of the rod 32 so as to be appropriately positioned at the upper open end 28a, and the float 30 seals the open end 28a.

As described above, according to the drain recovery type exhaust pipe of the present invention, drainage (recovery) and prevention of exhaust gas leakage can be reliably performed without causing a failure in the normally closed valve means 26.

The structure shown in FIG. 1 is an example in which the exhaust inlet pipe 16 is connected to the exhaust pipe main body 10 in the horizontal direction and the exhaust outlet pipe 18 is connected in the vertical direction (vertical direction). In such a connection form, the exhaust gas generated by the combustion equipment flows into the exhaust pipe main body 10 through the exhaust inlet pipe 16 and is discharged to the outside through the exhaust outlet pipe 18. And, even when the reverse wind pressure is applied, the exhaust gas can substantially avoid the reverse flow in the direction of the exhaust inlet pipe.

However, in some cases, the exhaust outlet pipe 18
May be horizontally connected to the main body 10 in some cases. In that case, for example, the backflow prevention means 50 having a structure as shown in FIG.
It is good to provide. The backflow prevention means 50 is mounted vertically above the entrance of the exhaust inlet pipe 16 to the main body 10 by means of an appropriate means such as a hinge means for closing or opening the entrance by the exhaust gas flow. good. This means 50 can be, for example, a plate-like opening / closing device.

[0047]

As described above, the drain recovery type exhaust pipe of the present invention has a simple structure, so that the product cost is reduced. Further, the exhaust pipe of the exhaust pipe of the present invention is used by being horizontally connected to the exhaust pipe from the combustion equipment. In addition, the exhaust pipe of the present invention can collect the drain generated by cooling the water contained in the combustion exhaust gas due to the extension of the exhaust due to the extension of the exhaust gas so that the drain does not accumulate in the exhaust pipe. It does not cause the structure.

Accordingly, the drain recovery type exhaust pipe of the present invention can be connected at low cost to the exhaust system of a combustion apparatus which has been difficult to improve in the past. Moreover, the drain recovery type exhaust pipe of the present invention is extended upward by using the exhaust system duct of the conventional combustion equipment, and the exhaust pipe is extended upward between the extension and the combustion equipment.
It can be easily installed by connecting.

The drain recovery type exhaust pipe of the present invention is
By installing it in the middle of the vertical extension of the exhaust pipe of CF type equipment, drain can be collected effectively without leakage of exhaust gas, so that failure or corrosion of combustion equipment due to drainage Can be prevented.

The drain recovery type exhaust pipe of the present invention is
If connected to the exhaust system where the drain of the FE-type equipment easily accumulates, the drain can be effectively collected without causing exhaust gas leakage. Corrosion can be prevented.

[Brief description of the drawings]

FIG. 1 is a view showing one configuration example of a drain recovery type exhaust pipe of the present invention, wherein (A) is a schematic perspective view of the appearance and (B) is a longitudinal sectional view thereof.

FIG. 2 is a partial cross-sectional view of another configuration example of the drain recovery type exhaust pipe of the present invention.

[Explanation of symbols]

 10: Exhaust pipe main body 12: Ceiling wall 14: Bottom wall (or bottom) 16: Exhaust inlet pipe 18: Exhaust outlet pipe 18a: Lower open end (of the exhaust outlet pipe) 20: Peripheral wall 22: Collar part 24: Drain reservoir (Storing) 26: Normally closed valve means 28: Drain pipe 28a: Upper open end (of the drain pipe) 30: Floating means (float) 32: Rod 34: Stopper means 40: U trap 50: Backflow prevention means

Claims (8)

[Claims] 1. A tubular exhaust pipe main body for connecting an exhaust inlet pipe and an exhaust outlet pipe provided at the same height or higher than the exhaust inlet pipe, and the exhaust of the exhaust pipe main body. A drain reservoir provided below the position of the inlet pipe; and normally closed valve means provided in the drain reservoir and opened by the drain to discharge the drain to the outside of the exhaust pipe main body. Drain collection type exhaust pipe. 2. The drain collection type exhaust pipe according to claim 1, wherein the drain reservoir is constituted by a lower portion including a bottom wall at a vertically lower portion inside the exhaust pipe body, and the normally closed valve. Means for draining the bottom wall so as to penetrate in the vertical direction and project from the inside of the exhaust pipe body to the outside, and normally closing an open end of the drain pipe on the inner side of the exhaust pipe body. And a floating means disposed at the opening end. 3. The drain recovery type exhaust pipe according to claim 1, wherein the floating means is a spherical body formed of a material floating on the drain. 4. A drain recovery type exhaust pipe according to claim 1, wherein said floating means comprises a rod-shaped body extending vertically downward in said drain pipe. Recovery type exhaust pipe. 5. The drain recovery type exhaust pipe according to claim 1, wherein the floating means comprises a rod extending vertically downward in the drain pipe, and further comprising the exhaust pipe. A drain recovery type exhaust pipe characterized in that the main body is provided with stopper means attached to an inner wall thereof to limit the lifting of the floating means. 6. The drain recovery type exhaust pipe according to claim 2, wherein the drain opening pipe has an external open end connected to a U trap. 7. The drain recovery type exhaust pipe according to claim 1, wherein when the exhaust inlet pipe and the exhaust outlet pipe are provided on a peripheral wall of the exhaust pipe main body, the exhaust pipe of the exhaust inlet pipe is provided. A drain recovery type exhaust pipe, wherein a backflow prevention means is provided at an inlet inside the pipe body. 8. The exhaust pipe according to claim 1, wherein the exhaust outlet pipe is provided on a ceiling wall of the exhaust pipe main body, and the exhaust outlet pipe is provided inside the exhaust pipe main body. A drain recovery type exhaust pipe characterized by being provided with a flange part by protruding.