JP3216420B2 - Combustion machine exhaust pipe connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe connecting device for a combustor such as an FF or CF 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 the step is exhausted to the outside of the room. Therefore, in this type of combustor, the main body side exhaust pipe 53 protruded from the combustion section 52 is made to protrude through an exhaust pipe hole 55 provided in the back plate 54 of the apparatus main body 51, and this main body side exhaust pipe 5
An exhaust pipe 56 is connected to the exhaust pipe 3 to exhaust exhaust gas to the outside of the room.

There is a risk that the exhaust pipe 56 will come off simply by being fitted and connected to the exhaust pipe 53 on the main body side. Therefore, conventionally, as shown in FIGS. 5, 6, and 7, an exhaust pipe 56 is provided with a retaining structure.

That is, in FIG. 5, a circular notch (not shown) of an exhaust pipe retaining metal fitting 59 is fitted to the outside of an annular convex portion 58 of an exhaust pipe 56 into which an O-ring 57 for maintaining airtightness is inserted. The exhaust pipe 56 is retained by attaching the exhaust pipe retainer 59 to the device main body back plate 54 with the thumb screw 61 below the exhaust pipe 56.

In FIGS. 6 and 7, a pair of engaging pieces 62 are provided at appropriate positions on the peripheral edge of the exhaust pipe hole 55 of the back plate 54 of the main body of the apparatus. The circular notch 64 is combined with the annular projection 58 of the exhaust pipe 56.
Of the exhaust pipe 56 by being fitted on the outside of the exhaust pipe 56 to prevent the exhaust pipe 56 from coming off.

[0006]

However, in the above-mentioned conventional arrangements, any of the exhaust pipes 5 for the exhaust pipe 53 on the main body side is required.
6 is difficult to attach and detach, and there is a problem that it takes time to install and maintain the device body.

That is, in the former case, the operation of tightening the thumb screw 61 below the exhaust pipe 56 must be performed, and the tightening direction of the thumb screw 61 is horizontal as shown by the arrow A. Since the gap between the screw 65 and the screw 65 is narrow, the work of tightening the thumb screw 61 is very difficult, and it takes time to install and maintain the main body of the device.

Although the latter does not have the difficulty of tightening the thumbscrew 61 and the exhaust pipe retaining piece 63 can be easily attached and detached, the exhaust pipe 56 is connected to the main body exhaust cylinder 53 via the O-ring 57. O-ring 5
The exhaust pipe 56 was firmly inserted and removed due to the frictional force of 7, and the installation and maintenance of the device body was time-consuming due to the difficulty of insertion and removal. The latter problem is the same in the former case, and such a problem can be solved by eliminating the O-ring 57. However, in this case, airtightness of the exhaust pipe connection cannot be ensured.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has as its first object to facilitate the operation of inserting and removing an exhaust pipe while ensuring airtightness. The second object is to facilitate the attachment / detachment work, and the third and fourth objects are to ensure more reliable airtightness of the exhaust pipe connection part and to facilitate the work of inserting and removing the exhaust pipe. It is.

[0010]

According to the present invention, in order to achieve the first object, an apparatus main body, a combustion section provided in the apparatus main body, and an exhaust of a rear panel of the apparatus main body derived from the combustion section are provided. A main body side exhaust pipe facing the pipe hole, an engagement piece provided at a suitable position around the outer surface of the exhaust pipe hole of the device main body back plate, and fitted to the main body side exhaust pipe via an O-ring for maintaining airtightness. An exhaust pipe connected thereto, and a locking plate provided rotatably on an annular convex portion of the exhaust pipe, and a locking plate provided at an appropriate position on an outer peripheral edge thereof with a locking piece for engaging with the engaging piece on the device body side. The exhaust piece is fixed to the back plate of the equipment main body by rotating the stop piece and engaging the locking piece with the engagement piece of the equipment main body, and the O-ring is formed by the annular convex portion of the exhaust pipe. It is configured to be pressed and fixed to the end of the side exhaust cylinder.

In order to achieve the second object, a mounting plate is provided at an end of the exhaust pipe on the main body side, and an end opening of the exhaust pipe on the main body side is aligned with a hole for an exhaust pipe on a rear plate of the equipment main body. The mounting plate is screwed and fixed to the inner surface of the back plate of the device body from inside.

In order to achieve the third and fourth objects,
At the proper position around the exhaust pipe hole on the back plate of the equipment main body, an engagement piece and a screw stop piece are provided together with an engagement piece. A fixing piece for screwing is provided, and the locking plate is rotated until the fixing piece contacts the screw fixing piece on the device main body side, and the locking piece is fitted to the engaging piece on the device main body side. The fixing piece of the locking plate is screwed and fixed to the screw fixing piece on the device main body side, and the fixing piece formed on the locking plate and the screw fixing piece on the device main body side are screwed on the upper side of the device main body. To the downward direction from above, or a configuration in which a bent piece for handwork is provided on the rotation side edge of the fixed piece formed on the locking plate, and a portion around the exhaust pipe hole on the outer surface of the back plate of the device main body Attach a reinforcing plate to this reinforcing plate. There as the formed structure.

[0013]

According to the first aspect of the present invention, the connecting portion of the exhaust pipe is inserted into the exhaust pipe on the main body side so that the O-ring abuts on the end of the exhaust pipe on the main body side. The engagement piece on the back plate side of the device body may be bayonet-engaged by rotating while pressing against the back plate of the device body, thereby completing the exhaust pipe connection operation, and The airtightness is ensured by pressing against the end of the side exhaust cylinder. Also,
To remove the exhaust pipe, the opposite operation may be performed. That is, according to this configuration, since the O-ring is only in pressure contact with the end of the exhaust pipe on the main body side, insertion and removal of the exhaust pipe on the main body side and the exhaust pipe can be performed with a light force, and attachment and detachment of the locking plate. It can be easily performed even if the gap between the device body and the wall is narrow, making installation and maintenance of the device easy, and the locking plate holds the entire circumference of the exhaust pipe. Pressing against the back plate side of the main body enables firm fixing of the exhaust pipe,
In addition, since the entire periphery of the O-ring is pressed against the end of the exhaust pipe on the main body side, high airtightness can be secured.

Further, according to the second configuration, the end of the exhaust pipe on the main body side is fixed to the back plate of the apparatus main body by the mounting plate. In addition, the work of inserting and removing the exhaust pipe from the main body and the exhaust pipe can be performed more easily, and the end of the exhaust pipe on the main body is removed via the O-ring by removing the screw fixing the mounting plate. Since it is only pressed against the exhaust pipe attached to the back panel of the equipment body, combustion from inside the equipment body while the equipment body is installed, that is, with the exhaust pipe attached to the back panel of the equipment body The part can be taken out, and the screw can be removed from the inside of the device main body, that is, from the front, so that attachment and detachment of the combustion part can be performed very easily.

Further, according to the third and the following constructions, since the fixing piece of the locking plate is screwed to the screw fixing piece on the device body side, the locking plate does not accidentally rotate and come off. ,
In addition, since this screw can be tightened or loosened from above, it can be easily screwed even if the gap between the device main body and the wall is narrow, and the above-mentioned locking plate has a bent piece of the fixed piece. The holding plate can be rotated without damaging the hand, and the thickness of the reinforcing plate can be increased to improve the strength of the engagement piece and increase the bayonet coupling force of the locking plate.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 to 3. 1 is a main body of a device such as a hot air heater, 2 is a back plate thereof, and has an exhaust pipe hole 3 formed therein. . 4 is the device body 1
In this embodiment, a main body side exhaust pipe 6 is led out via a heat exchanger 5 in a combustion section provided in the inside. This body side exhaust pipe 6
Has a flange 6a formed at its end, and a mounting plate 7 is rotatably integrated. And the flange 6 of the main body side exhaust pipe 6
The main body side exhaust tube 6 is attached to the back plate 2 by fixing the mounting plate 7 to the inner surface of the back plate 2 with screws 8 from the inside so that a coincides with the exhaust pipe hole 3 of the back plate 2.

Numeral 9 is a reinforcing plate attached to the outer surface of the back plate 2 around the exhaust pipe hole 3, and as shown in FIG. In addition, three engagement pieces 11 and one screw stopper piece 12 are formed around an opening portion facing the exhaust pipe hole 3. Each of the engagement pieces 11 has an inclined portion 11a on the side facing the rotation direction indicated by the arrow X, and a screw hole 12a is formed in the screw stopper piece 12. Is also formed on the reinforcing plate 9, but the back plate 2
In the case where the thickness is large and has sufficient strength, the reinforcing plate 9 can be eliminated by directly forming the rear plate 2.

Reference numeral 14 denotes an exhaust pipe connected to the exhaust pipe 6 on the main body, which connects a supply / exhaust top 16 penetrating through a wall surface 15 and the exhaust pipe 6 on the main body. It is guided to the supply / exhaust top 16 and is discharged outside the room. The exhaust pipe 14 is connected to a connecting portion 14 to the exhaust pipe 6 on the main body side.
An annular convex portion 17 is provided at a, and a disk-shaped locking plate 18 is rotatably attached to the annular convex portion 17. An O-ring 19 is provided on a portion of the annular projection 17 opposite to the locking plate 18.
Are fitted and mounted.

The locking plate 18 has a pair of locking pieces 20 and one fixing piece 21 which are formed on the outer peripheral edge of the locking plate 18 in an inclined shape. By holding and rotating in the direction of the arrow X, the engaging piece 20 is engaged with the engaging piece 11 on the device main body side and attached.

Here, when the locking piece 20 is engaged with the engaging piece 11, the locking plate 18 is attached to the O-ring 1 of the exhaust pipe 14.
9 so as to press against the flange 6a of the exhaust pipe 6 on the device body side.
The locking piece 20 is inclined so that it becomes higher as it is opposite to the rotation direction (the direction of the arrow X), and has a bayonet coupling structure in which the more it is rotated in the direction of the arrow X, the more strongly it engages with the engagement piece 11 on the device body side. is there. The inclination for bayonet connection is provided on the engaging piece 11 side of the device main body side, and the locking piece 2
0 may be parallel.

The fixing piece 21 of the locking plate 18 is configured to come into contact with the screw fixing piece 12 on the apparatus main body side when rotated in the direction of arrow X, and is formed at the center thereof. A screw 22 is inserted into the through hole 21 a and is fixed to the screw stopper 12 by tightening the screw 22 into the screw hole 12 a of the screw stopper 12. The screwing is performed in a downward direction from above the rear surface of the device main body 1.

In the drawing, reference numeral 23 denotes a bent piece provided on the both ends of the fixed piece 18 on the rotation direction side and the opposite side thereof, and reference numeral 24 denotes an engagement piece relief formed on the outer peripheral edge of the locking plate 18. It is a notch part for use.

Next, a description will be given of an operation of attaching and detaching the exhaust pipe 14 when the apparatus main body 1 is installed or removed for maintenance or the like in the above 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 connection portion 14.
a is inserted into the exhaust pipe 6 on the main body side. Then, while pressing the locking plate 18 of the exhaust pipe 14 against the back plate 2 of the equipment main body 1, hold the fixing piece 21 until an arrow hits the screw stopper piece 12 on the equipment main body side. X, the bayonet connection of the locking piece 20 of the locking plate 18 to the engaging piece 11 on the device body side, and the fixing piece 21 of the locking plate 18 is
A screw 22 may be attached to 2. Thereby, the exhaust pipe 14
The O-ring 19 fitted to the connecting portion 14a is pressed against the flange portion 6a of the main body side exhaust tube 6 to secure the airtightness.

When the device body 1 is to be removed, the operation reverse to the above-mentioned operation, that is, the screw 22 is removed, and then the fixing piece 21 is rotated in the direction opposite to the arrow X so that the locking plate 18 is removed.
Of the exhaust pipe 1 as it is.
It may be taken out from the exhaust pipe 6 on the main body side by holding it at 4.

As described above, this exhaust pipe connection device allows the attachment and detachment of the exhaust pipe 14, that is, the installation and removal of the equipment body 1, by a simple operation. In particular, since the O-ring 19 for ensuring the airtightness of the connection portion of the exhaust pipe 14 is only pressed against the flange 6a of the exhaust pipe 6 on the main body side, the insertion and removal of the exhaust pipe 14 can be performed by the conventional exhaust pipe on the main body side. It does not require a strong force like an O-ring fitted to the outer circumference of the cylinder, and can be performed with a very light force. Therefore, even if the gap between the device main body 1 and the wall surface 15 is narrow, the operation is extremely simple. Can be done. Moreover, the exhaust pipe 14 and the O-ring 19 are strong due to the bayonet coupling force of the locking plate 18 and the entire circumference thereof is pressed against the flange 6a of the main body side exhaust cylinder 6, so that reliable airtightness can be secured.

Further, since the locking plate 18 for retaining and fixing the exhaust pipe 14 is made detachable by rotation, it can be easily performed even in a narrow gap.
Since the screws 1 can also be fixed downward from above the rear surface of the device main body 1, it can be performed without difficulty, and the work of inserting and removing the exhaust pipe 14 is further simplified.

Further, the locking plate 18 is fixed to the fixing piece 21.
Is screwed to the screw fixing piece 12 on the device body side, so that even in the case of bayonet connection, it does not accidentally rotate and come off, and the exhaust pipe 14 can be securely fixed, thus ensuring safety. Can be secured.

Further, since the fixing piece 21 of the locking plate 18 is provided with a bent piece 23 for handling, there is no danger of the hand being hurt as in the case where the end face is left exposed, and the hand is hurt. Since there is no fear, the bayonet coupling force can be increased, and the airtightness can be improved by increasing the exhaust pipe fixing force.

The engaging piece 11 on the equipment main body side for engaging the locking plate 18 is formed on the reinforcing plate 9 by attaching the reinforcing plate 9 to the back plate 2 of the equipment main body 1. By increasing the thickness, the strength can be improved without increasing the thickness of the rear panel 2 of the device main body, and the bayonet coupling force can be increased without increasing the material cost of the device main body 1 to increase the exhaust pipe 14.
It is possible to further increase the airtightness by increasing the pressing force against the rear panel of the device main body.

Further, since the end of the main body side exhaust pipe 6 is fixed to the equipment main body back plate 2 by the mounting plate 7 so as not to be inadvertently moved, the exhaust pipe 14 can be easily inserted and connected.

On the other hand, in this exhaust pipe connection device, the combustion section 4 is detached from the inside of the equipment main body 1 with the equipment main body 1 installed, that is, with the exhaust pipe 14 attached to the back plate 2 of the equipment main body 1. be able to. 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 18 and is merely fitted to the main body exhaust pipe 6. Mounting plate 7
If the screw 8 is removed and the combustion part 4 is pulled out forward as it is, it can be taken out. Also, the removed combustion part is 4
Fits the flange 6a of the main body side exhaust pipe 6 to the connection part 14a of the exhaust pipe 14 projecting from the equipment main body rear plate 2, and attaches the mounting plate 7 of the flange 6a to the rear plate 2. If you stop it, you can attach it.

Since the mounting plate 7 is screwed from the inside of the device body 1 to the inner surface of the back plate 2, the mounting plate 7 can be removed from the front by removing the front plate of the device body 1. There is no need to tighten or loosen the screws from the side,
The attachment and detachment of the combustion section 4 can be performed very easily.

[0034]

As is apparent from the above description of the embodiment, according to the present invention, the connection portion of the exhaust pipe is inserted into the exhaust pipe on the main body side via the O-ring, and then the locking plate is attached to the back of the equipment main body. It is sufficient that the locking piece is engaged with the engaging piece on the back plate side of the device main body by rotating while pressing against the face plate, whereby the connection work of the exhaust pipe is completed, and the O-ring is connected to the main body side exhaust pipe. Airtightness is ensured by pressing against the end. Further, when removing the exhaust pipe, the opposite operation may be performed. According to the structure of the present invention, since the O-ring only presses against the end of the main body side exhaust pipe, the insertion and removal of the main body side exhaust pipe and the exhaust pipe can be performed with a light force, and the locking plate is provided. Since it is only necessary to rotate the attachment / detachment, even if the gap between the device main body and the wall is narrow, it can be easily performed, and the installation and maintenance of the device main body become easy,
The locking plate holds the entire circumference of the exhaust pipe and presses it against the back plate side of the device main body, so that the exhaust pipe can be firmly fixed, and the entire circumference of the O-ring is pressed against the end of the main body side exhaust pipe. Therefore, high airtightness can be secured.

Further, according to the second configuration, since the end of the exhaust pipe on the main body side is fixed to the back plate of the apparatus main body by the mounting plate, the end of the exhaust pipe on the main body side may move when the exhaust pipe is inserted and removed. In addition, the work of inserting and removing the exhaust pipe from the main body and the exhaust pipe can be performed more easily, and the end of the exhaust pipe on the main body is removed via the O-ring by removing the screw fixing the mounting plate. Since it is only pressed against the exhaust pipe attached to the back panel of the equipment body, combustion from inside the equipment body while the equipment body is installed, that is, with the exhaust pipe attached to the back panel of the equipment body Since the part can be taken out and the screw can be installed from the inside of the apparatus main body, that is, from the front, attachment and detachment of the combustion part can be performed very easily.

Further, according to the third and the following constructions, first, the fixing piece of the locking plate is screwed to the screw fixing piece on the device body side without the locking plate being rotated carelessly and coming off. Thus, the exhaust pipe can be reliably prevented from falling off.

Further, the screw which can be tightened or loosened from above can be easily screwed even if the gap between the device body and the wall is narrow, and the fixing of the exhaust pipe is ensured. And easy insertion and removal of the exhaust pipe.

In the case where the fixed piece is provided with a bent piece on the rotation direction side of the fixed piece, it is sufficient to hold the fixed piece when rotating the locking plate, and the handle portion of the fixed piece has an end face. Since the bent piece is located without being exposed, it can be done safely without injuring the hand, thereby strengthening the bayonet binding force of the locking plate and increasing the exhaust pipe fixing force to improve airtightness. Can be achieved.

In the case where the reinforcing plate is attached and the engaging piece is formed on the reinforcing plate, the strength of the engaging piece can be improved by increasing the thickness of the reinforcing plate. It is possible to increase the bayonet coupling force, thereby increasing the pressing force of the exhaust pipe against the back plate of the device main body, thereby further improving the airtightness.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an exhaust pipe connection device for a combustor according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the exhaust pipe connection device.

FIG. 3 is a cross-sectional view of the combustor including the exhaust pipe connection device.

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Back plate 3 Exhaust pipe hole 4 Combustion part 6 Main body side exhaust tube 6a Flange (end) 7 Mounting plate 9 Reinforcement plate 11 Engagement piece 12 Screw stop piece 14 Exhaust pipe 17 Ring convex part 18 Stop plate 19 O-ring 20 Locking piece 21 Fixing piece 23 Bending piece

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24H 9/02 302

Claims (6)

(57) [Claims] 1. An apparatus main body, a combustion section provided in the apparatus main body, a main body side exhaust pipe extending from the combustion section and facing an exhaust pipe hole of a rear panel of the apparatus main body, and a rear panel of the apparatus main body. An engagement piece provided at a suitable position around the outer surface of the exhaust pipe hole, an exhaust pipe fitted and connected to the main body side exhaust cylinder via an O-ring for maintaining airtightness, and an annular convex portion of the exhaust pipe rotatably. A locking plate provided with a locking piece that engages with the engaging piece on the device main body side at an appropriate position on the outer peripheral edge thereof, and the locking piece is rotated to move the locking piece to the engaging piece of the device main body. , The exhaust pipe is fixed to the back plate of the device main body, and the O-ring is pressed and fixed to the end of the exhaust pipe on the main body side by the annular convex portion of the exhaust pipe. Pipe connection device. 2. A mounting plate is provided at an end of a main body side exhaust pipe, and the mounting plate is attached to an equipment main body such that an end opening of the main body side exhaust pipe coincides with an exhaust pipe hole of a device main body back plate. 2. The exhaust pipe connection device for a combustor according to claim 1, wherein screws are fixed to the inner surface of the back plate from inside. 3. The device body is provided with an engagement piece and a screw stopper at an appropriate position around the exhaust pipe hole of the back plate of the device body, and the locking plate is provided together with the engagement piece engaged with the engagement piece on the device body side. A fixing piece for screwing is provided on the screw fixing piece on the side of the device, and the locking plate is rotated until the fixing piece contacts the screw fixing piece on the device main body side, and the locking piece is engaged with the engaging piece on the device main body side. 2. The exhaust pipe connecting device for a combustor according to claim 1, wherein the fixing piece of the locking plate is screwed and fixed to the screw fixing piece on the device main body side. 4. The exhaust pipe connection device for a combustor according to claim 3, wherein the screwing between the fixing piece of the locking plate and the screw fixing piece on the device main body side is performed in a downward direction from the upper side of the device main body. 5. The exhaust pipe connection device for a combustor according to claim 3, wherein a bent piece for handling is provided at an end in the rotation direction of the fixed piece formed on the locking plate. 6. The exhaust pipe connection device for a combustor according to claim 3, wherein a reinforcing plate is attached to an outer peripheral portion of the exhaust pipe hole on the outer surface of the back plate of the apparatus main body, and an engaging piece and a screw fixing piece are formed on the reinforcing plate.