JP3685587B2 - Exhaust pipe connection structure of heat source machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a floor heating panel and Fankon circulation supplying the heat source machine heat medium heated in the radiator, such as a vector, more particularly, to a connecting structure of an exhaust pipe attached to the top plate.
[0002]
[Prior art]
FIG. 4 is a partial cross-sectional view of a heat source machine showing a conventional exhaust pipe connection structure.
[0003]
In FIG. 4, 50 is a top plate as an exterior body mounted on the top of the heat source machine, and 51 is a top surface (lid) portion of the muffler housed inside the exterior body. A cylindrical exhaust outlet pipe 52 is spot welded to an exhaust gas outlet provided on the top surface of the muffler 51, and the exhaust pipe inlet 53 provided in the top plate 50 is located above the cylindrical part. It is more prominent. The exhaust outlet pipe 52 is connected to and fixed to an exhaust pipe 57 by using a cylinder connecting member such as a protective cover 61, a relay duct 54 with an O-ring seal 55, and a fixed ring 56. In addition, the heat exchanged exhaust gas introduced into the muffler 51 is exhausted to the outside through the exhaust pipe 57.
[0004]
Here, the detailed structure of the exhaust pipe connecting portion will be described. A fixing ring 58 for attaching a member is spot welded to a cylindrical portion of the exhaust outlet pipe 52, and a packing 59 is interposed in the fixing ring 58. The protective cover 61 is screwed. Further, a relay duct 54 fitted to the exhaust pipe 57 is fitted to the protective cover 61, and both are fixed by a fixed ring 56. Then, the portion where the exhaust outlet pipe 52 is fitted with the outlet portion of the muffler 51 and the portion where the exhaust outlet pipe 52 is fitted with the protective cover 61 at the other end of the exhaust outlet pipe 52 are filled with putty 60 for ensuring airtightness. Has been.
[0005]
[Problems to be solved by the invention]
As described above, the conventional exhaust pipe connecting portion requires many connecting members such as the fixing ring 58, the protective cover 61, the fixing ring 56, and the relay duct 54, and the structure thereof is extremely complicated. As described above, since spot welding processing and putty sealing processing of the exhaust outlet pipe 52 are also necessary, workability is poor and cost is high.
[0006]
Further, when the connecting structure of the tubular bodies is complicated, it is difficult to seal the part fitting portion, and the airtightness is inferior.
[0007]
The present invention has been made to eliminate the above-mentioned drawbacks, and aims to provide an exhaust pipe connection structure of a heat source machine that simplifies the structure and reduces costs and improves airtightness. It is said.
[0008]
[Means for Solving the Problems]
That is, in the present invention described in claim 1, the muffler attached to the upper portion of the can body and into which the exhaust gas after heat exchange is introduced is connected to the exhaust pipe for guiding the introduced exhaust gas to the outside of the machine. An exhaust pipe connection structure for connecting an exhaust outlet pipe connected to the muffler and having a cylindrical portion projecting from an exhaust pipe introduction port provided on a top plate, and a match between the exhaust outlet pipe and the exhaust pipe A connecting pipe with an O-ring seal fitted so as to cover the part, and a fixing body that is fitted to the connecting pipe and that is screwed to the top plate to fix the connecting pipe to the top plate. The muffler is provided with a U-shaped protrusion at the periphery of the inlet , and the protrusion is pressed against the tube plate at the top of the can body with a packing material interposed therebetween, and the folded portion is connected to the tube. Screw the flange part of the plate and attach the muffler Characterized by comprising attached to Kikan body.
[0009]
According to a second aspect of the present invention, the base end portion of the exhaust outlet pipe is fastened to the periphery of the outlet portion of the muffler by a caulking method.
[0010]
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
[0012]
FIG. 1 is an external view of a heat source apparatus to which the present invention is applied, FIG. 2 is an internal structural view thereof, and FIG. 3 is a partial sectional view of the heat source apparatus showing an embodiment of an exhaust pipe connection structure.
[0013]
1 includes a front panel 5 that can be attached and detached, a side panel 3, a top plate 4 at the top of the machine body, and a frame 2 at the bottom of the machine body. A pressure cap cover 26 protrudes from the center of the top plate 4, and further, an exhaust pipe 19 is connected to the left side thereof, and an air supply hose 29 is connected to the right side thereof, and the exhaust pipe 19 and the air supply hose 29 are connected to each other. It is an indoor installation type heat source device configured to be connected to the exhaust cylinder 30 and led to the outdoors and open to the atmosphere.
[0014]
Next, the internal structure of the heat source apparatus will be described with reference to FIG. 2. In FIG. 2, reference numeral 1 denotes the exterior body described above, and a stainless steel can 6 is provided on one side of the exterior body 1. A muffler 7 connected to the upper portion of the can body 6, a circulation pump 8 installed at the lower portion of the can body 6, and the like are accommodated. A burner 9 such as an oil vaporizing burner for heating the fuel, a fuel pump 10 and an oil labeler 11 for supplying fuel to the burner 9, a supply fan 28 for supplying combustion air to the burner 9, and an open air reserve A tank 12 and the like are accommodated. The air supply hose 29 passes through the top plate 4, and the lower end thereof is connected to the suction port of the air supply fan 28.
[0015]
Reference numeral 13 denotes a support base mounted on the gantry 2. The can body 6 is placed and fixed in an upright state on the upper surface of the support base 13, and the circulation pump 8 is accommodated in the internal space of the support base 13. Has been.
[0016]
The can body 6 has a vertically long cylindrical shape and is composed of an inner cylinder 14, an outer cylinder 15, a plurality of smoke pipes 16, and the like, and a combustion chamber 17 in which the combustion gas of the burner 9 flows is formed inside the inner cylinder 14. In addition, a water chamber 18 is formed between the inner cylinder 14 and the outer cylinder 15 to store water as a heat medium and circulating water such as ethylene glycol used as an antifreeze. Further, the plurality of smoke pipes 16 pass through the water chamber 18 above the top of the inner cylinder 14 and are connected to the entrance of the muffler 7.
[0017]
A pressure cap pipe 21 is connected to the upper portion of the can 6 corresponding to the top of the water chamber 18, and the reserve tank 12 is connected to the upper end of the pressure cap pipe 21 via a flexible thin pipe 22. A pressure cap 24 connected to the pipe is mounted, and an outer peripheral portion thereof is covered with a pressure cap cover 26 and protrudes from the top plate 4.
[0018]
Reference numeral 20 denotes a metal outgoing pipe connected to the upper part of the can body 6, and the other end of the outgoing pipe 20 is connected to the inlet side of the circulation pump 8 via a flexible hose 23.
[0019]
With the above configuration, the high-temperature combustion gas generated in the combustion operation of the burner 9 is heat-exchanged with the heat medium in the water chamber 18 when passing through the combustion chamber 17 and the plurality of smoke pipes 16, and becomes exhaust gas to become the muffler 7 Then, it is introduced into the exhaust pipe 19 and discharged to the outside from the supply / exhaust cylinder 30.
[0020]
On the other hand, the heat medium in the water chamber 18 heated to a high temperature is sucked into the circulation pump 8 through the forward piping 20 by driving the circulation pump 8, and further from the circulation pump 8 through the circulation pipe 27 to a floor heating panel (not shown). It flows into an external radiator such as a fan convector and is exchanged for heat, and then returned to the water chamber. In this way, the heating medium is repeated by repeating the circulation of the heat medium.
[0021]
Next, the exhaust pipe connection structure, which is a feature of the present invention, will be described with reference to FIG.
In FIG. 3, reference numeral 6 denotes a can, and a muffler 7 is connected to the top of the can. The muffler 7 has a two-stage throttle structure in which an annular U-shaped protrusion 37 is formed on the periphery of the inlet portion, and the protruding surface portion of the can body 6 is interposed via a heat insulating packing material 38. The tube plate 39 attached to the top is pressed against the tube plate 39 and fixed to the can 6 by screwing the folded portion 40 to the flange portion 39a of the tube plate 39.
[0023]
A cylindrical exhaust outlet pipe 31 to which the exhaust pipe 19 is connected is connected to an outlet provided on the top surface of the muffler 7, and the cylindrical part is provided on the top plate 4 positioned above. Projecting from the exhaust pipe inlet 32. The exhaust outlet pipe 31 is structured to be connected and fixed to the muffler 7 by fastening the base end portion 31a to the periphery of the outlet portion of the muffler 7 by a caulking method.
[0024]
Further, since the outer diameters of the exhaust outlet pipe 31 and the exhaust pipe 19 are substantially the same diameter, the respective opening portions are brought into contact with each other to form one cylindrical body, and the connecting pipe 33 is fitted so as to cover the abutting portion 34. Once worn, the tube can be easily connected and fixed.
[0025]
Since the joint groove 33a is formed in an annular shape at two upper and lower portions of the connection pipe 33, and an elastic O-ring seal 35 is mounted in the joint groove 33a, the connection pipe 33 is fitted into the cylindrical body. When worn, the O-ring seals 35 in the pipes are firmly pressed against the respective pipe walls so that both pipes are securely fixed, and the O-ring seal 35 sufficiently secures the airtightness of the connecting parts of the pipes. .
[0026]
Reference numeral 36 denotes a fixing body for fixing the connection pipe 33 to the top plate 4, and a flange portion 36 a is formed on the periphery of the opening base. The fixing body 36 is fitted to the cylindrical portion of the connection pipe 33, and the flange 36 a is screwed to the top plate 4, whereby the exhaust pipe 19 connected to the exhaust outlet pipe 31 by the connection pipe 33 is attached to the top plate 4. It is fixed to the exhaust pipe inlet 32.
[0027]
【The invention's effect】
As described above, according to the present invention described in claim 1, the exhaust pipe connecting portion connects the exhaust outlet pipe connected to the muffler and the exhaust pipe with the connection pipe with an O-ring seal, Since the connection pipe is fixed to the top plate with a fixed body, the connection structure is simplified and the number of parts is greatly reduced. As a result, workability is improved and costs can be reduced. In addition, the conventional packing material and putty seal are not used, and all the fitting parts between parts have an O-ring seal structure, so the sealing performance of the fitting parts is improved and the air tightness of the equipment is greatly improved. Is done. Furthermore, a U-shaped protrusion is provided at the periphery of the inlet of the muffler, and the protrusion is pressed against the tube plate at the top of the can body, so that packing seal is possible, and the conventional structure using spot welding and putty seal is achieved. In comparison, the mounting structure of the can body and the muffler is simplified, so the workability is improved and the cost can be greatly reduced .
[0028]
Further, according to the second aspect of the present invention, the connecting structure of the exhaust outlet pipe and the muffler is a fastening process by a caulking method, so that parts and materials can be reduced as compared with the conventional structure by troublesome spot welding and putty seal. At the same time, workability is improved.
[0029]
[Brief description of the drawings]
FIG. 1 is an external view of a heat source machine to which the present invention is applied.
FIG. 2 is an internal structural diagram of the heat source machine.
FIG. 3 is a partial cross-sectional view of a heat source machine showing an exhaust pipe connection structure according to the present invention.
FIG. 4 is a partial cross-sectional view of a heat source machine showing a conventional exhaust pipe connection structure.
[Explanation of symbols]
4 Top plate 6 Can body 7 Muffler 17 Combustion chamber 19 Exhaust pipe 31 Exhaust outlet pipe 31a Exhaust outlet pipe base end 32 Exhaust pipe introduction port 33 Connecting pipe 34 Butt section 36 Fixed body 36a Fixed body flange section 37 U-shape Protrusion 38 Packing material 39 Tube plate 40 Folding part

Claims (2)

An exhaust pipe connection structure for connecting a muffler attached to the upper portion of the can body, into which exhaust gas after heat exchange is introduced, and an exhaust pipe for guiding the introduced exhaust gas to the outside of the machine,
An exhaust outlet pipe connected to the muffler and having a cylindrical portion protruding from an exhaust pipe introduction port provided on the top plate, and an O fitted to cover the butted portion of the exhaust outlet pipe and the exhaust pipe. It is composed of a connecting pipe with a ring seal, and a fixed body that fits to the connecting pipe and is fixed to the top board by screwing the flange portion to the top board.
A U-shaped protrusion is provided on the periphery of the inlet portion of the muffler, and the protrusion is pressed against the tube plate at the top of the can body with a packing material interposed therebetween, and the folded portion is screwed to the flange portion of the tube plate. An exhaust pipe connection structure for a heat source machine, wherein the exhaust pipe is attached to the can body .   The exhaust pipe connection structure for a heat source machine according to claim 1, wherein a base end portion of the exhaust outlet pipe is fastened to a peripheral edge of the outlet portion of the muffler by a caulking method.

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