JPH0821660A - Combustion instrument - Google Patents

Abstract

PURPOSE:To attach/detach an exhaust pipe to and from the exhaust tube of a main body with a slight force while securing air-tightness by a method wherein the main body exhaust tube and the exhaust pipe are connected so as to be abutted against each other through an O-ring interposed between abutting parts formed on the exhaust tube and the exhaust pipe respectively while both of them can be attached and detached freely by only sliding a retaining plate into the direction of a straight line. CONSTITUTION:Upon installing the main body of a combustion instrument, such as a FF type warm-air room heater and the like, at first, the other end connecting part 14a of an exhaust tube 14, whose one end is connected to an air feeding and discharging top, is fitted into the exhaust tube of a main body loosely. Next, both sides bent pieces 20a of a retaining plate 20 are inserted into an engaging piece 10 so that the protruded part 18 of the exhaust pipe 14 is fitted into an U-shape notched parts, then, a dislocation preventing piece 22 is fixed to a screwing piece 11 through a screw. According to this method, the exhaust pipe 14 is attracted to the side of the main body exhaust tube 6 and the abutting part 17 is pushed strongly against the abutting part of the main body exhaust tube through the O-ring whereby both of them are connected and fixed under air-tight condition. Upon removing the main body 1 of the instrument, the screw 23 is removed and the retaining plate 20 is pulled out of the engaging piece 10 upwardly whereby the main body 1 can be removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustor such as an FF or CF type hot air heater.

[0002]

2. Description of the Related Art Generally, a combustor of this type is provided with a combustion section 52 in an apparatus body 51 as shown in FIG.
The combustion gas generated in 2 is exhausted to the outside of the room. Therefore, in this type of combustor, the main body exhaust pipe 53 led out from the combustion section 52 is projected from the exhaust pipe hole 55 provided in the back plate 54 of the device main body 51, and the exhaust pipe 56 is connected to the main body exhaust pipe 53. Exhaust gas is exhausted outdoors. The exhaust pipe 56 is fitted and connected through an O-ring 57 so that exhaust gas does not leak from the connecting portion.

Further, the exhaust pipe 56 is provided with a retaining structure as shown in FIGS. 5, 6 and 7 so as not to accidentally come off.

That is, in FIG. 5, a U-shaped cutout portion (not shown) of the exhaust pipe retaining metal 59 is provided outside the annular convex portion 58 of the exhaust pipe 56 into which the airtight O-ring 57 is inserted.
And fit the exhaust pipe retaining metal 59 to the exhaust pipe 56.
The exhaust pipe 56 is prevented from coming off by being attached to the back plate 54 of the device body on the lower side with a thumbscrew 61.

In FIGS. 6 and 7, a pair of engaging pieces 62 are provided at appropriate positions on the periphery of the exhaust pipe hole 55 of the rear plate 54 of the main body of the apparatus, and the exhaust piece retaining piece 63 is fitted to the engaging pieces 62. By fitting the U-shaped notch 64 to the outside of the annular projection 58 of the exhaust pipe 56, the exhaust pipe 56 is prevented from coming off.

[0006]

However, in any of the above-described conventional configurations, the exhaust pipe 56 with respect to the main body exhaust pipe 53 is used.
It is difficult to attach and detach the device, and there is a problem that it takes time to install and remove the device body.

That is, in any of the above cases, the exhaust pipe 56
Is air-tightly fitted to the main body exhaust pipe 53 via the O-ring 57, so that the exhaust pipe 56 will not have the above-mentioned O even if the retainer fitting 59 or the retainer piece 63 that prevents the exhaust pipe 56 from being removed is removed. Because of the ring 57, the airtight connection is maintained, and the exhaust pipe 56 is hard to insert and remove due to the frictional force of the O-ring 57. Due to the difficulty of insertion and removal, it takes time to install and remove the device body. there were.

Further, in the former case, the operation of tightening the thumbscrew 61 under the exhaust pipe 56 must be performed, and the tightening direction of the thumbscrew 61 is horizontal as indicated by arrow A, Since the gap between the wall surface 65 and the wall 65 is narrow, it is very difficult to tighten the thumbscrew 61, which makes installation and removal of the device body more difficult.

The present invention has solved the above-mentioned conventional problems, and it is an object of the present invention to make it easy to insert and remove the exhaust pipe while ensuring airtightness and to easily install and remove the device body. The first purpose is to further facilitate the work of attaching / detaching the combustion part in the device body, and the third purpose is to enable the exhaust pipe connecting part to be reliably retained and fixed. It is what

[0010]

In order to achieve the first object of the present invention, an equipment body, a combustion section provided in the equipment body, and an exhaust gas of a back plate of the equipment body derived from the combustion section. It consists of a main body exhaust pipe facing the pipe hole, an exhaust pipe connected to the main body exhaust pipe, and a locking plate that holds and fixes the exhaust pipe, and the main body exhaust pipe and the exhaust pipe each have a butting part. Formed and butt-connected by interposing an O-ring between the butt portions, an engaging piece for slidingly inserting the locking plate is provided on the rear plate of the device body. Either the engaging piece or the locking plate is provided. By forming a tapered part on one side and slidingly inserting the locking plate into the engaging piece, the exhaust pipe is drawn toward the exhaust pipe side of the main body, and the O-ring is compressed between the butting parts to hold and connect in an airtight state. By removing the stop plate, The tube is a structure in which a loosely fitted state.

In order to achieve the second object, the end portion of the main body exhaust pipe is fixed to the inner surface of the back plate of the device main body with screws from the inside, and the locking plate is slid and inserted into the engaging piece.
The exhaust pipe is fixed to the back plate of the main body of the equipment, the exhaust pipe is pulled toward the exhaust pipe side of the main body, and the O-ring is compressed between the abutting parts of the exhaust pipe to connect and hold it in an airtight state. The exhaust pipe is loosely fitted.

Further, in order to achieve the third object, either the locking plate or the engaging piece is provided with a disengagement prevention means so that the locking plate cannot be disengaged by a component force of the taper.

[0013]

According to the first aspect of the present invention, the main body exhaust pipe and the exhaust pipe are in an airtight connection state by compressing the O-rings at their abutting portions, and if the locking plate is removed from the engaging piece, both Is in a loose fitting state. Therefore, the exhaust pipe can be lightly inserted into or removed from the main body exhaust pipe by removing the locking plate. Further, since the locking plate can be attached and detached only by sliding it in the linear direction, it can be easily performed even if the gap between the device body and the wall surface is narrow. That is, according to this configuration, the main body exhaust pipe and the exhaust pipe can be inserted and removed with a light force while ensuring airtightness, and the locking plate can be attached and detached in the narrow gap between the device main body and the wall surface. It is easy to install and remove the device body easily.

According to the second configuration, since the main body exhaust pipe is fixed to the back plate of the device main body, the end of the main body exhaust pipe does not move when the exhaust pipe is inserted and removed, and the main body exhaust pipe and the exhaust pipe It becomes easier to insert and remove from the pipe, and if the screw that fixes the main body exhaust pipe is removed, the main body exhaust pipe is attached to the back plate of the device main body through the O-ring. Since it is only pressure-contacted via the O-ring, the combustion part can be taken out from the inside of the device body with the device body installed, that is, with the exhaust pipe attached to the back plate of the device body, Moreover, since the screws can be attached from the inside of the main body of the device, that is, from the front, the combustion unit can be attached and detached very easily, and the maintenance is simplified.

Further, according to the third structure, the locking plate is prevented from being unintentionally rotated and disengaged by the component force of the taper portion, and reliable fixed holding can be realized.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, 1 is a device body such as a hot air heater, 2 is a back plate thereof, and an exhaust pipe hole 3 is formed therein. . 4 is the device body 1
In the combustion section provided inside, the main exhaust pipe 6 is led out via the heat exchanger 5 in this embodiment. As shown in FIG. 1, the main body exhaust pipe 6 has its end portion doubly projected so that the abutting portion 6
A mounting plate 7 is rotatably mounted while forming a. Then, the mounting plate 7 is fixed to the inner surface of the rear plate 2 with screws 8 from the inside so that the abutting portion 6a of the main body exhaust pipe 6 is aligned with the exhaust pipe hole 3 of the rear plate 2. It is attached to 2.

Reference numeral 9 is an engaging piece plate attached to the hole edge portion of the exhaust pipe hole 3 of the back plate 2, and as shown in FIG.
At the same time, in this embodiment, the fixing plate 7 is fixed by using the screw 8. The engagement piece plate 9 has downwardly inclined engagement pieces 10 on both sides thereof, and a screw stop piece 11 is formed on the upper portion of one side thereof.

Reference numeral 14 denotes an exhaust pipe connected to the main body exhaust pipe 6 for connecting a supply / exhaust top 16 penetrating the wall surface 15 and the main body exhaust pipe 6 to supply / exhaust combustion gas from the combustion section 4. It is guided to the top 16 and discharged outside. The exhaust pipe 14 is a connecting portion 1 that is loosely fitted into the main exhaust pipe 6.
4a, and the connecting portion 14a is provided with an abutting portion 17 and a convex portion 18 which are projected in an annular shape. The connecting portion 14a is loosely fitted into the main body exhaust pipe 6 so that the abutting portion 17 comes into contact with the abutting portion 6a of the main body exhaust pipe 6 via the O-ring 19.

Reference numeral 20 denotes a locking plate inserted into the engaging piece 10 of the engaging piece plate 9 for fixing and holding the exhaust pipe 14 connected to the main body exhaust pipe 6, and a U-shaped cut formed in the central portion thereof. Lack 2
The exhaust pipe 14 is press-fitted and fixed to the main body exhaust pipe 6 by fittingly inserting 1 into the convex portion 18 of the exhaust pipe 14. That is, the exhaust pipe 14 is pulled toward the main exhaust pipe 6 side by the locking plate 20 engaged with the convex portion 18 due to the inclination of the engaging piece 10 into which the locking plate 20 is inserted.
The butt portion 17 is connected to the main body exhaust pipe 6 via the O-ring 19.
It is strongly pressed against the abutting portion 6a, and is connected and fixed in an airtight state. Reference numeral 22 is a retaining piece for fixing the locking plate 20, and a screw 23 is provided on the screw retaining piece 11 of the engaging piece plate 9.
It is designed to be fixed with.

Next, a description will be given of the work of attaching / detaching the exhaust pipe 14 at the time of installation or maintenance of the device body 1 in the above-mentioned configuration.

First, when the apparatus body 1 is installed, the exhaust pipe 14 connected to the air supply / exhaust top 16 is connected to the connecting portion 14 of the exhaust pipe 14.
A is loosely fitted into the main body exhaust pipe 6. Next, the locking plate 20 is inserted so that the U-shaped notch 21 fits into the convex portion 18 of the exhaust pipe 14.
Both side bent pieces 20a are inserted into the engaging pieces 10, and the retaining pieces 22 are fixed to the screw fixing pieces 11 with screws. As a result, the exhaust pipe 14 is pulled toward the main body exhaust pipe 6 side as described above, and the abutting portion 17 is strongly pressed against the main body exhaust pipe 6 abutting portion 6a via the O-ring 19 to be connected and fixed in an airtight state. Become.

Further, when the device body 1 is removed, the reverse operation to the above, that is, the screw 23 is removed, and then the hook piece 20b of the locking plate 20 can be pulled out from the engaging piece 10, whereby the exhaust pipe 14 can be removed. Is loosely fitted into the main body exhaust pipe 6 and can be extracted from the main body exhaust pipe 6.

As described above, according to this structure, the connecting portion 14a of the exhaust pipe 14 is loosely fitted into the main body exhaust pipe 6,
Since the O-ring 19 for ensuring the airtightness of the connecting portion is only in pressure contact between the main body exhaust pipe 6 and the abutting portions 6a, 17 of the exhaust pipe 14, the insertion and removal of the exhaust pipe 14 are not performed in the conventional main body exhaustion. Unlike the case where an O-ring is fitted to the outer circumference of the cylinder, it does not require a strong force and can be performed with an extremely light force. Therefore, even if the gap between the device body 1 and the wall surface 15 is narrow, the work can be performed. Very easy to do. Moreover, since the exhaust pipe 14 and the O-ring 19 are strongly pressed against the abutting portion 6a of the main body exhaust pipe 6 by the fitting of the locking plate 20 and the inclined engagement piece 10, a reliable airtightness can be secured.

Further, since the locking plate 20 for fixing and holding the exhaust pipe 14 can be attached / detached by sliding movement in the vertical direction, it can be easily carried out even in a narrow gap, and the locking plate 20 Since the screw 23 can be stopped downward from above the rear surface of the device body 1, it can be carried out without any trouble, and the work of inserting and removing the exhaust pipe 14 becomes even easier.

Moreover, both sides of the locking plate 20 are bent 20a to be inserted into the engaging piece 10 and the engaging piece 1
0 is formed on the engaging piece plate 9 provided separately from the device main body rear plate 2 so that the plate thickness can be increased, so that the strength is increased and the exhaust pipe 14 is pressed against the main body exhaust pipe side with a strong force. Therefore, it is possible to ensure reliable air-tightness.

Further, by fixing the locking plate 20 with the screw 23, even if the locking plate 20 is taper-engaged due to the inclination, the locking plate 20 will not be unintentionally slid out by the component force of the taper. It becomes possible to secure the exhaust pipe 14 securely and ensure safety.

Moreover, the end of the main body exhaust pipe 6 is attached to the mounting plate 7.
Since it is fixed to the back plate 2 of the device main body so as not to move carelessly, the exhaust pipe 14 can be easily inserted and connected.

On the other hand, in this exhaust pipe connecting device, the combustion unit 4 is attached / detached from the inside of the device body 1 with the device body 1 installed, that is, with the exhaust pipe 14 attached to the back plate 2 of the device body 1. It is possible and easy to maintain.
That is, as described above, the exhaust pipe 14 is attached to the back plate 2 of the device main body 1 by the locking plate 20, and the main exhaust pipe 6 is attached.
Since it is merely loosely fitted, it can be taken out by removing the screw 8 of the mounting plate 7 of the main body exhaust pipe 6 and pulling out the combustion part 4 as it is. Further, the removed combustion portion 4 is a connecting portion 1 of an exhaust pipe 14 in which a butt portion 6a of a main body exhaust pipe 6 thereof is projected from a back plate 2 of an apparatus main body.
4a, and the mounting plate 7 is fixed to the rear plate 2 with a screw so that the mounting plate 7 can be mounted.

Here, in the main body exhaust pipe 6, the exhaust pipe 14 connected therein is loosely fitted as described above, and the O-ring 19 is merely in pressure contact with the abutting portion 17 of the exhaust pipe 14. Therefore, the insertion / removal with respect to the exhaust pipe 14 can be performed extremely lightly, and even the work with the heavy combustion section 5 can be easily performed. Further, the mounting plate 7 is the device body 1
Since it is fixed to the inner surface of the back plate 2 from the inside of the machine, it can be done from the front by removing the front plate of the device body 1, and it is not necessary to tighten or loosen the screws from the back side of the device body, which is even easier. The combustion unit 4 can be attached and detached.

In the above embodiments, the abutting portions 6a and 17 of the main body exhaust pipe 6 and the exhaust pipe 14 are formed so as to project in an annular shape, but at least one of them may be expanded in a tapered shape. Alternatively, the pipe may be expanded into a stepped shape, or the like, and the point is that any structure may be adopted as long as it is in a butt state. Further, the screw 10 for stopping the engagement piece plate 9 in the above-mentioned invention example can also be used as the screw 8 for fixing the main body exhaust pipe 6.

[0031]

As is apparent from the above description of the embodiments, according to the present invention, the main body exhaust pipe and the exhaust pipe are O-shaped at their abutting portions.
When the ring is compressed to be in an airtightly connected state and the locking plate is removed, the both are loosely fitted. Therefore, the exhaust pipe can be lightly inserted into or removed from the main body exhaust pipe by removing the locking plate. Further, since the locking plate can be attached and detached only by sliding it, it can be easily attached and detached even if the gap between the device body and the wall surface is narrow.

That is, according to this structure, the main body exhaust pipe and the exhaust pipe can be inserted / removed with a light force while ensuring airtightness, and the attachment / detachment of the locking plate is narrow between the device main body and the wall surface. It can be easily done in a gap, and makes it easy to install and remove the device body.

According to the second structure, since the main body exhaust pipe is fixed to the back plate of the device main body, the end of the main body exhaust pipe does not move when the exhaust pipe is inserted and removed, and the main body exhaust pipe and the exhaust pipe It becomes easier to insert and remove from the pipe, and if the screw that fixes the main body exhaust pipe is removed, the main body exhaust pipe is attached to the back plate of the device main body through the O-ring. Since it is only pressure-contacted via the O-ring, the combustion part can be taken out from the inside of the device body with the device body installed, that is, with the exhaust pipe attached to the back plate of the device body, Moreover, since the screws can be attached from the inside of the main body of the device, that is, from the front, the combustion unit can be attached and detached very easily, and the maintenance is simplified.

Further, according to the third structure, the locking plate is prevented from being inadvertently slid and disengaged by the component force of the taper engagement, and it is possible to securely fix and hold the locking plate.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an exhaust pipe connecting portion of a combustor according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an exhaust pipe connecting portion of the combustor.

FIG. 3 is a sectional view showing the overall configuration of the same combustor.

FIG. 4 is a sectional view of a conventional combustor.

FIG. 5 is a cross-sectional view showing a configuration example of an exhaust pipe connection of the conventional combustor.

FIG. 6 is a perspective view showing another exhaust pipe connection configuration example of the conventional combustor.

FIG. 7 is a sectional view of the exhaust pipe connecting device.

[Explanation of Codes] 1 Device Main Body 2 Back Plate 3 Exhaust Pipe Hole 4 Combustion Section 6 Main Body Exhaust Cylinder 6a Butt Section 10 Engaging Piece 14 Exhaust Pipe 17 Butt Section 19 O-ring 20 Locking Plate 23 Detachment Prevention Screw

Claims (3)

[Claims] 1. A device main body, a combustion part provided in the device main body, a main body exhaust pipe which is led out from the combustion part and faces an exhaust pipe hole of a rear plate of the main body of the device, and is connected to the main exhaust pipe. The exhaust pipe and a locking plate for fixing the exhaust pipe to prevent the exhaust pipe from coming off. The main body exhaust pipe and the exhaust pipe each have a butt portion, and an O-ring is interposed between the butt portions for butt connection. At the same time, an engaging piece for slidingly inserting the locking plate is provided on the back plate of the device body, and a taper portion is formed on either the engaging piece or the locking plate to secure the locking plate to the engaging piece. The exhaust pipe is pulled toward the main body exhaust pipe side by slide insertion, and the O-ring is compressed between the abutting parts of the main body exhaust pipe to connect and hold it in an airtight state, and the locking plate is removed to loosely fit the main body exhaust pipe and the exhaust pipe. Combustion machine. 2. A device main body, a combustion part provided in the device main body, a main body exhaust pipe which is led out from the combustion part and faces an exhaust pipe hole of a rear plate of the main body of the device, and is connected to the main exhaust pipe. The exhaust pipe and a locking plate for fixing the exhaust pipe to prevent the exhaust pipe from coming off.The main body exhaust pipe is fixed to the inner surface of the back plate of the device body with screws from the inside, and the main exhaust pipe and the exhaust pipe The pipes are formed with butt portions, and butt connections are made by interposing an O-ring between the butt portions, and an engagement piece for slidingly inserting the locking plate is provided on the back plate of the device body. Alternatively, a taper portion is formed on either one of the locking plates and the locking plate is slidably inserted into the engaging piece to fix the exhaust pipe to the back plate of the device main body and pull the exhaust pipe toward the main body exhaust pipe side. Airtight by compressing the O-ring between the butt members A combustor in which the main exhaust pipe and the exhaust pipe are loosely fitted to each other by connecting and holding the state and removing the locking plate. 3. The combustor according to claim 1 or 2, wherein disengagement preventing means is provided on either one of the locking plate and the engaging piece to prevent the locking plate from being disengaged by a component force of the taper.