JPH038857Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of exhaust piping for heaters, etc., and more specifically, the present invention relates to the structure of exhaust piping for heaters, etc., and more specifically, the invention relates to piping for discharging exhaust from devices such as heat exchangers equipped with burners installed in the casing of heaters, etc. This invention relates to an exhaust piping structure for a heater, etc., which has a simple structure that can be easily attached from outside the casing.

Conventionally, there is an exhaust piping structure for this type of heating machine, etc., known from Japanese Utility Model Application Publication No. 147477/1983, and this will be explained based on Figs. 3 and 4. For example, in a forced-through heater, a heat exchanger 11 equipped with a burner is built into the casing 10, and a piping structure for discharging combustion exhaust from the burner from the heat exchanger 11 is connected to the heat exchanger 11. The exhaust pipe 13 is inserted into the connecting pipe 12 between the casing 10 and the casing 10.
The fixing structure of the connecting pipe 12 and the exhaust pipe 13 is that the connecting pipe 1
2 has one end attached to the body exhaust port of the heat exchanger 11, and the other end attached to the hole 10a of the casing 10.
The exhaust pipe 13 protrudes outward from the casing 10 and is free from the hole 10a, and the exhaust pipe 13 is fixed to the casing 1 with two fixing fittings 14 and 15 outside the casing 10 main body.
The fixing fitting 14 includes an engaging portion 14a that engages with the half circumference of the base 12b of the annular projection 12a of the connecting tube 12, and a locking portion extending downward from both sides of the engaging portion 14a at the tip. A pair of legs 14b, 14b formed with 14c, 14c are provided, and the connecting tube 12 is engaged with the engaging portion 14a inside the annular protrusion 12a of the connecting tube 12 using the fixing fitting 14,
The other fixing fitting 15 includes an engaging portion 15a that engages with a half circumference of the base portion 13b of the annular projection 13a of the exhaust pipe 13.
and the fixing metal fitting 1 extends from the engaging portion 15a.
4, and has a pair of leg parts 15b, 15b that engage with the locking parts 14c, 14c of the exhaust pipe 13. The fixing fitting 15 is used to attach the engaging part 15a to the outside of the annular protrusion 13a of the exhaust pipe 13. the fixing metal fitting 1
The legs 15a, 15a of the fixture 15 are locked to the locking parts 14c, 14c of the casing 10, and the screw holes 16a, 16b, 16c of the fixtures 14, 15 are used to overlap the three. The connecting pipe 12 and exhaust pipe 13 are fixed with screws.

When using this piping structure, the heat exchanger 11
The other end of the connecting pipe 12 attached to the exhaust pipe 1
Before connecting 3, exhaust pipe 1 was connected in order to move freely.
There is a defect in that the attachment part of the connecting pipe 12 to the heat exchanger 2 moves every time 3 is inserted or removed, and this attachment part becomes distorted, resulting in a poor seal. Another drawback is that it requires a lot of time and the structure itself is complicated.

The present invention was devised in view of the above-mentioned conventional deficiencies and to improve them. In order to create a simple exhaust piping structure, the connecting pipe that connects equipment such as the heat exchanger and the casing is first fixed, and
Attach the fixing fitting that fixes the exhaust pipe to be inserted into the connecting pipe.
In order to achieve this objective, the configuration of the present invention is such that one end of the exhaust piping structure of a heating machine or the like that discharges the exhaust gas from the equipment 2 such as a heat exchanger disposed inside the casing 1 is provided. is attached to the device 2, and the other end is a hole 1a provided in the casing 1.
A connecting pipe 3 is inserted into the connecting pipe 3 and fixed by screws 6 from outside the casing 1 with a flange 3a provided at the tip of the other end so as to be in contact with the lower part of the hole 1a, and the connecting pipe 3 is fixed with a screw 6. 1. An exhaust pipe 4 which can be inserted from the outside and has an annular protrusion 4a provided in the middle so that it can come into contact with the flange 3a from the outside of the casing 1.
an engaging portion 5a extending along the exhaust pipe 4 on the outside in the direction of the cylinder center of the annular protrusion 4a and engaging with a half circumference thereof; and a mounting portion extending above the engaging portion 5a and attached to the casing 1. 5b, the exhaust pipe 4 is inserted into the connecting pipe 3 from outside the casing 1, and the engaging part 5a
The exhaust piping structure of the heater is characterized in that the exhaust pipe 4 is fixed by engaging the annular protrusion 4a with the flange 3a which abuts on the inner side in the direction of the cylinder core.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a vertical sectional view of the exhaust piping structure of the present invention, Figure 2
The figure is an exploded perspective view of the main parts of FIG. 1. 1 is a casing of a heater, 2 is a heat exchanger equipped with a burner, which is disposed inside the casing 1, 2a is an exhaust port for discharging combustion exhaust from the burner, and 3 is a heat exchanger with one end connected to the exhaust port 2a with a screw or the like. The attached connecting pipe 3a is a flange provided at the other end of the connecting pipe 3, and is inserted through the hole 1a drilled in the casing 1 to protrude outside the casing 1, and the other end of the connecting pipe 3 is connected to the It contacts the lower part of the hole 1a, and is screwed 6 to the casing 1 from the outside of the casing 1 by the flange, and 3b is an annular projection and an O-ring 8 is accommodated in the inner recess of the annular projection 3b.

Further, 4 is an exhaust pipe, and 4a is an annular projection provided on the exhaust pipe 4. The tip of the exhaust pipe 4 can be inserted into the connecting pipe 3 from outside the casing 1, and when inserted, the The annular projection 4a abuts the outer surface of the flange 3a of the connecting pipe 3, and the tip of the exhaust pipe 4 is accommodated in the annular projection 3b in the middle of the connecting pipe 3.
It is designed to be sealed by a ring 8.

Furthermore, 5 is a fixing metal fitting, 5a and 5b are an engaging part and a mounting part of the fixing metal fitting 5, respectively, and the engaging part 5a has an inverted U-shaped part that engages with a half circumference of the exhaust pipe 4. The mounting portion 5b extends upward from the engaging portion 5a and is integrally formed with a rising portion via an inner bent portion, and screw holes 5c, which are screwed 6 to the casing 1, are provided in the rising portion. It is set up.

The relationship between the exhaust pipe 4 and the fixing fitting 5 is such that the exhaust pipe 4 is inserted into the connecting pipe 3 by the annular protrusion 4.
a to the outer surface of the flange 3a, and insert the engaging part 5a of the fixing fitting 5 into the exhaust pipe 4 from above.
is engaged with the outer periphery of the annular protrusion 4a until it abuts on the outside of the annular protrusion 4a.
c, and the exhaust pipe 4 is fixed by using screws 6 using these screw holes.

In the example of the present invention, in order to attach the exhaust pipe of the present invention to the heat exchanger 2, as is clear from the above, one end of the connecting pipe 3 is first attached to the exhaust port 2a of the heat exchanger 2. When the tip of the connecting pipe 3 is inserted through the hole 1a of the casing 1,
a, and the flange 3a at the other end is fixed to the casing 1 with screws 6 from outside the casing 1, so that the connecting pipe 3 is firmly attached between the heat exchanger 2 and the casing 1, and is shipped from the factory in this state. The exhaust stack 4 will be connected on-site, but the method for connecting the exhaust stack 4 is as follows.
As described above, the exhaust pipe 4 is inserted into the connecting pipe 3, the annular protrusion 4a of the exhaust pipe 4 is brought into contact with the outer surface of the flange 3a of the connecting pipe 3, and then the fixing fitting 5 is inserted into the engaging part 5a.
is brought into contact with the outer side of the annular projection 4a in the direction of the cylindrical center,
In this state, the screw hole 5 of the mounting part 5b of the fixture 5
screw holes 1c, 1c of casing 1 by c, 5c
By screwing 6 between them, the annular protrusion 4a of the exhaust pipe 4 is held between the flange 3a and the engaging part 5a, and the exhaust pipe 4 is firmly fixed. The upper opening of the blank hole 1a of the casing 1 is closed by the mounting portion 5b.

Although the example of the present invention has been described with respect to a heater, it can also be applied to exhaust piping from equipment disposed inside the casing 1 of models other than heaters, and also,
In the above example, the annular projection 4a of the exhaust pipe 4 is held between the outer surface of the flange 3a of the connecting pipe 3 and the engaging portion 5a of the fixing fitting 5 to fix the exhaust pipe 4.
It is also possible to simply engage the engaging portion 5a of the fixture 5 to the outside of the annular protrusion 4a of the exhaust pipe 4 to prevent the exhaust pipe 4 from coming off from the connecting pipe 3 without clamping it.

As described above, the present invention provides an exhaust piping structure for a heating machine or the like that discharges exhaust gas from a device 2 such as a heat exchanger disposed inside a casing 1, in which one end is attached to the device 2 and the other end is attached to the casing 1. Stupid hole 1
a connecting pipe 3 which is inserted through the casing 1 and fixed with a screw 6 from outside the casing 1 with a flange 3a provided at the tip of the other end so as to be in contact with the lower part of the hole 1a;
An exhaust pipe 4 that can be inserted into the connecting pipe 3 from outside the casing 1 and has an annular protrusion 4a disposed midway so that it can come into contact with the flange 3a from the outside of the casing 1; The fixing fitting 5 includes an engaging part 5a that extends along the exhaust pipe 4 and engages with the half circumference of the exhaust pipe 4, and a mounting part 5b that extends above the engaging part 5a and is attached to the casing 1. The exhaust pipe 4 is inserted into the connecting pipe 3 from outside the casing 1, and the engaging part 5
By forming an exhaust piping structure for a heater, etc., in which the exhaust pipe 4 is fixed by engaging the annular protrusion 4a with the flange 3a that abuts on the inner side in the direction of the cylinder core, so as to fix the exhaust pipe 4. 3, one end is attached to the device 2 and the other end is attached to the casing 1, and the connecting tube 3 is firmly attached with a flange 3a by contacting the lower part of the hole 1a of the casing 1, and the tip of the connecting tube is attached as in the conventional example above. Since it is not in a state where it can move freely, the important part where it is attached to the device 2 will not be distorted.

As is clear from the foregoing, the means for fixing the exhaust pipe 4 is to engage the engaging portion 5a of the fixing fitting 5 on the outer side of the annular projection 4a of the exhaust pipe 4 in the direction of the cylinder center.
Since it is fixed simply by attaching the exhaust pipe 4 to the casing 1, the fixing work is easy, and since only one fixing fitting 5 is required, the work to fix the exhaust pipe 4 must be done on-site, but this work is extremely simple. The number of parts is smaller than that of the conventional example mentioned above, and the structure is simpler, which contributes to cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the exhaust piping structure of the heater, etc. of the present invention, Fig. 2 is an exploded perspective view of the main parts of Fig. 1, and Fig. 3 is a longitudinal sectional view of the conventional exhaust piping structure. FIG. 4 is an exploded perspective view of the main part of FIG. 3. 1...Casing, 1a...Simple hole, 2...Equipment such as heat exchanger, 3...Connecting pipe, 3a...Flange, 4...Exhaust pipe, 4a...Annular protrusion, 5...Fixing metal fitting, 5a ...Engaging part, 5b...Mounting part, 6...
...screw stop.

Claims (1)

[Scope of utility model registration request] In the exhaust piping structure of a heating machine or the like that discharges the exhaust gas from a device 2 such as a heat exchanger disposed in a casing 1, one end is attached to the device 2 and the other end is inserted through a hole 1a provided in the casing 1. Then, a screw 6 is fixed from outside of the casing 1 using a flange 3a provided at the tip of the other end so as to be in contact with the lower part of the blank hole 1a.
a connecting pipe 3 fixed to the connecting pipe 3; an exhaust pipe 4 which can be inserted into the connecting pipe 3 from outside the casing 1 and has an annular protrusion 4a disposed midway so that it can come into contact with the flange 3a from the outside of the casing 1; The annular projection 4
A fixing metal fitting consisting of an engaging part 5a that extends along the exhaust pipe 4 on the outside in the direction of the cylinder core and engages with the half circumference of the exhaust pipe 4, and a mounting part 5b that extends above the engaging part 5a and is attached to the casing 1. 5, the exhaust pipe 4 is inserted into the connecting pipe 3 from outside the casing 1, and the engaging portion 5a and the flange 3a abutting on the inside in the direction of the cylinder center are engaged so as to sandwich the annular protrusion 4a. An exhaust piping structure for a heater or the like in which the exhaust pipe 4 is fixed by doing so.