JP4283306B2 - Exhaust tube mounting structure with drain pipe - Google Patents

Description

  The present invention relates to an exhaust pipe mounting structure with a drain pipe provided in a combustor.

  When the exhaust cylinder provided in the combustor has an upstream horizontal cylinder part and a standing cylinder part extending upward from the horizontal cylinder part, drainage generated by condensation of moisture in the combustion exhaust gas in the exhaust cylinder Water flows down to the horizontal cylinder through the upright cylinder. The drain water is strongly acidic, and it is necessary to drain the drain water from the horizontal cylinder part in order to prevent corrosion of the horizontal cylinder part.

  Therefore, conventionally, there has been known a structure in which a drain pipe extending downward is connected to the horizontal cylinder portion, and drain water flowing down to the horizontal cylinder portion can be drained through the drain pipe (see, for example, Patent Document 1). .

Here, if the connecting portion of the drain pipe is attached in a state where the horizontal tube portion is rotationally shifted from the normal phase located at the lowermost portion of the horizontal cross section of the horizontal tube portion, the drain water remains in the horizontal tube portion. At the manufacturing stage of the combustor, the horizontal cylinder portion is managed so as to be in a normal phase when the exhaust cylinder is attached. However, conventionally, there is no means for forcibly constraining the horizontal cylinder portion to the normal phase, and when the exhaust tube is removed during maintenance, the horizontal cylinder portion is shifted from the normal phase when the exhaust tube is reinstalled. It may be installed.
JP 7-318169 A

  This invention makes it the subject to provide the attachment structure of the exhaust pipe with a drain pipe which made it possible to attach a horizontal cylinder part reliably by a regular phase in view of the above point.

In order to solve the above problems, the present invention has an upstream horizontal cylinder part and a standing cylinder part extending upward from the horizontal cylinder part, and a drain pipe extending downward is connected to the horizontal cylinder part. In the mounting structure of the exhaust pipe with drain pipe provided in the combustor, the horizontal cylinder part has a non-circular non-circular cross-sectional part having a cross-sectional shape of at least one flat part, and the non-circular cross-sectional part with respect to the horizontal cylindrical part And a fixture having a plate portion that is in surface contact with the flat portion of the non-circular cross-sectional portion , and the fixture has a horizontal cylindrical portion that is connected to the drain pipe by a horizontal pipe portion. It is fixed to a combustor body or a built-in product in the body in a normal phase located at the bottom of the surface.

  According to the present invention, by attaching the fixture to the non-circular cross section of the horizontal cylinder portion, the horizontal cylinder portion is prevented from rotating with respect to the fixture. Since the fixture is fixed to the combustor body or built-in product with the horizontal cylinder portion in the normal phase, the horizontal cylinder portion is forcibly restricted to the normal phase by the fixture. . Therefore, even if the exhaust tube is removed once during maintenance, when the exhaust tube is reinstalled, the horizontal cylinder part is properly attached by simply attaching the fixture to the non-circular cross section of the horizontal cylinder part and fixing it to the body or built-in product. Can be securely installed in phase. Thus, the connecting portion of the drain pipe is located at the lowermost portion of the horizontal cross section of the horizontal cylindrical portion, and drain water can be prevented from remaining in the horizontal cylindrical portion.

  Further, in the present invention, an enlarged diameter part having a larger diameter than the other part is formed in a part of the horizontal cylinder part, and a lower plane that is recessed below the part of the horizontal cylinder part other than the enlarged diameter part at the lower part of the enlarged diameter part. The upper flat portion parallel to the lower flat portion is formed at the upper portion of the enlarged diameter portion, and the non-circular cross-sectional portion is constituted by the enlarged diameter portion, and the drain pipe is connected to the lower flat portion, and attached. It is desirable that the tool is configured so that the non-circular cross-sectional part is sandwiched from above and below in the upper and lower plane parts, and the fixture is fixed to the body or the built-in product so that the lower plane part is horizontal. According to this, the horizontal tube portion is firmly prevented from being rotated by the fixture in the upper and lower plane portions, and the level of the lower plane portion is ensured by fixing the fixture to the body or the built-in product. And since the lower plane part is depressed below the part of the horizontal cylinder part other than the enlarged diameter part, the drain water flowing down to the horizontal cylinder part gathers in the lower plane part and reliably from the drain pipe connected to the lower plane part. Drained.

  Further, when the non-circular cross-sectional portion is constituted by the enlarged diameter portion in this way, it is desirable that the fixture is provided with an engaging portion that engages with a step portion on the downstream side of the enlarged diameter portion. According to this, it is possible to prevent the horizontal cylindrical portion from coming off from the upstream side member connecting the horizontal cylindrical portion.

  By the way, if the horizontal tube portion and the upright tube portion of the exhaust tube are integrated, the bending moment about the axis of the horizontal tube portion that is constrained to the normal phase is caused by the displacement of the other member connecting the upper end of the upright tube portion. Acts on the upright tube and adversely affects durability.

  Therefore, in the present invention, the horizontal tube portion and the upright tube portion are configured separately, and an elbow portion that is bent in the horizontal direction is provided at the lower end of the standup tube portion, and the tip of the elbow portion is downstream of the horizontal tube portion. It is desirable to fit the end in a relatively rotatable manner. According to this, even if the other member connecting the upper end of the standing tube portion is displaced, it is possible to prevent a bending moment from acting on the standing tube portion due to the rotation of the elbow portion with respect to the horizontal tube portion.

  Hereinafter, an embodiment in which the present invention is applied to an attachment structure of an exhaust pipe with a drain pipe provided in a fireplace heater as a combustor will be described. As shown in FIGS. 1 to 4, the fireplace heater includes a body 1 and a combustion housing 2 provided in the body 1. The body 1 includes a bottom plate 1a, left and right side plates 1b, a back plate 1c, an upper plate 1d, a front panel 1e, and an extension case 1f attached to the left side of the back of the back plate 1c. It consists of and. As shown in FIG. 4, the container body 1 is installed so as to be embedded in a recess Wa formed in the chamber wall W, and only the front portion of the container body 1 is exposed in front of the chamber wall W.

  A burner 3 is disposed in the lower part of the combustion housing 2. In addition, a burner support plate 2a in which an opening for fitting the upper end of the burner 3 is formed is disposed in the combustion housing 2. On the burner support plate 2a, a dummy rod 4 formed of a refractory material such as ceramics is disposed. is doing. Then, a glass plate 2b is attached to the front surface of the combustion housing 2, and a window portion facing the front surface of the combustion housing 2 is opened on the front panel 1e of the container 1, and a window glass 1g is attached to the window portion. ing. Thus, the inside of the combustion housing 2 can be visually observed from the front of the front panel 1e, and when the burner 3 is burned, a visual impression can be given as if the soot 4 is burning. In addition, an air supply duct 5 is connected to the bottom surface of the combustion housing 2, and outdoor air is forcibly supplied into the combustion housing 2 through the air supply duct 5 by a suction force of an exhaust fan 12 described later. .

  A heat exchanger 6 in which combustion exhaust gas from the combustion housing 2 flows through the communication pipe 6 a is disposed in the vessel body 1 on the rear side of the combustion housing 2, and above the combustion housing 2. A pair of left and right hot air fans 7, 7 driven by a common fan motor 7a are arranged. And while opening the air intake 8 in the front edge part of each side plate part 1b on either side of the container 1, the ventilation opening 9 is opened in the lower part of the window glass 1g of the front panel 1e, and indoor air is air The air is sucked into the warm air fan 7 through the intake port 8 and is blown from the warm air fan 7 to the air blowing port 9 via the arrangement portion of the heat exchanger 6 and the space below the combustion housing 2 to perform the warm air heating function. I try to get it. In addition, the partition plates 2c and 2c reaching the bottom plate portion 1a and the back plate portion 1c of the container 1 are arranged on the left and right outer sides of the combustion housing 2, and the air blown from the hot air fan 7 is laterally transmitted. The two partition plates 2c and 2c can prevent escape. A guide plate 2 d that guides the air that has passed through the arrangement portion of the heat exchanger 6 to the air blowing port 9 is disposed below the combustion housing 2.

  In the vessel 1, further, a control device including an electronic control unit 10 and a valve unit 11 for the burner 3 is arranged in a side space on one side (right side) in the lateral direction between the combustion housing 2. Has been. Further, a side space on the other side (left side) in the lateral direction between the combustion housing 2 is connected to the downstream side of the heat exchanger 6 via an exhaust fan 12 (see FIG. 2) in the extension case 1f. An exhaust pipe 13 to be described in detail later is disposed.

  Here, as shown in FIG. 2, the left side space is partitioned by a partition plate 14 into a lower space below the exhaust tube 13 and an upper space in which the exhaust tube 13 is disposed. An air guide path 15 is provided for guiding the air flowing into the lower space to the upper space via the arrangement portion of the fan motor 12a for the exhaust fan 12 arranged in the extension case 1f. The air guide path 15 includes a first vent 15a opened on the back plate portion 1c of the body 1 so as to face the lower space, and an extension case 1f that guides air from the first vent 15a to an arrangement portion of the fan motor 12a. The inner air guide member 15b and the second vent 15c opened on the back plate portion 1c of the container 1 so as to face the upper space. According to this, the air guided to the arrangement part of the fan motor 12a by the air guide member 15b from the first vent 15a flows forward toward the outer surface of the exhaust fan 12 through the arrangement part of the fan motor 12a. Then, the air cooling of the fan motor 12a is performed. Thus, the heat loss of the fan motor 12a due to the heat of the combustion exhaust is prevented. The air that has passed through the arrangement portion of the fan motor 12a flows from the extension case 1f into the upper space via the second vent 15c and is sucked into the hot air fan 7.

  Next, the exhaust pipe 13 will be described in detail. As shown in FIG. 2, the exhaust tube 13 includes an upstream horizontal tube portion 131 connected to the exhaust fan 12, a standing tube portion 132 that is bent upward from the front end of the horizontal tube portion 131, and a standing tube portion 132. A downstream cylinder portion 133 that is bent rearward from the upper end of the tube and protrudes rearward of the back plate portion 1c, and is connected to the rear end of the downstream cylinder portion 133 and extends to the outdoors, not shown in the drawing. It is comprised by the exhaust pipe part inside an exhaust pipe.

  Here, drain water generated by condensation of moisture in the combustion exhaust gas in the exhaust cylinder 13 flows down from the downstream cylinder part 133 to the horizontal cylinder part 131 via the standing cylinder part 132. Therefore, as shown in FIGS. 5 to 7, a drain pipe 134 extending downward is connected to the horizontal cylinder portion 131. Referring to FIG. 2, drain pipe 134 extends downward from partition plate 14, and the lower end of drain pipe 134 is fitted to pipe 134 ′ attached so as to penetrate through partition plate 2 c. The drain water is drained from the horizontal cylinder 131 to a drain pan (not shown) placed on the guide plate 2d below the combustion housing 2 via the drain pipe 134 and the pipe 134 '. The drain pipe 134 is provided with a trap portion 134a in order to prevent leakage of combustion exhaust.

  By the way, in order to prevent the drain water from remaining in the horizontal cylindrical portion 131, it is necessary to attach the horizontal cylindrical portion 131 at a normal phase in which the connecting portion of the drain pipe 134 is located at the lowermost portion of the horizontal cross section of the horizontal cylindrical portion 131. is there. Therefore, in the present embodiment, a non-circular cross-sectional portion having a non-circular cross-sectional shape is formed in the horizontal cylindrical portion 131, and the mounting tool 135 is mounted in a state in which the horizontal cylindrical portion 131 is prevented from rotating in the non-circular cross-sectional portion. The mounting tool 135 can be fixed to the partition plate 2c in a state where the horizontal cylindrical portion 131 is in a normal phase.

  Hereinafter, this point will be described in detail. The horizontal cylindrical portion 131 is formed with an enlarged diameter portion 131a having a diameter larger than that of the other portion at an intermediate portion in the longitudinal direction. A lower flat portion 131b is formed below the enlarged diameter portion 131a. The lower flat portion 131b is recessed below a portion other than the enlarged diameter portion 131a. An upper flat portion 131c parallel to the lower flat portion 131b is formed above the enlarged diameter portion 131a. Is formed, and the non-circular cross section is constituted by the enlarged diameter portion 131a. A drain pipe 134 is connected to the lower flat surface portion 131b by caulking.

  The attachment tool 135 includes a vertical plate portion 135a, a lower plate portion 135b that is bent inward in the horizontal direction from the lower end of the vertical plate portion 135a, and an upper portion that is bent inward in the horizontal direction from the upper end of the vertical plate portion 135a. It is formed in a U shape having a plate portion 135c. Then, the attachment tool 135 is attached to the enlarged diameter portion 131a so that the upper flat surface portion 131c and the lower flat surface portion 131b of the enlarged diameter portion 131a are sandwiched from above and below by the upper plate portion 135c and the lower plate portion 135b. The horizontal cylinder 131 is firmly prevented from rotating with respect to 135. Note that a slit 135d is formed in the lower plate portion 135b so as to escape from the drain pipe 134.

  A flange portion 135e that is bent in the vertical direction is formed at the inner ends of the lower plate portion 135b and the upper plate portion 135c in the lateral direction. Then, as shown in FIG. 7, the flange portion 135 e is fixed to the partition plate 2 c with a screw in the mounting hole 135 f formed in the flange portion 135 e, so that the lower flat surface portion 131 b as the connecting portion of the drain pipe 134 is The horizontal cylindrical portion 131 is constrained to a normal phase that is positioned at the lowermost portion and becomes horizontal. As a result, the drain water flowing down to the horizontal cylindrical portion 131 gathers in the lower flat surface portion 131b and is surely drained from the drain pipe 134 connected to the lower flat surface portion 131b.

  The partition plate 14 is formed with a slit 14a that escapes from the drain pipe 134 so as to reach a laterally inner side edge. And after fixing the fixture 135 to the partition plate 2c, the partition plate 14 is fixed to the partition plate 2c in the state which put the drain pipe 134 in the slit 14a.

  Further, an engaging portion 135g that engages with a step portion 131d on the downstream side (front side) of the enlarged diameter portion 131a is formed on the front edge of the vertical plate portion 135a of the fixture 135. Thereby, the horizontal cylinder part 131 can be prevented from being detached from the exhaust fan 12 as an upstream member connecting the horizontal cylinder part 131.

  By the way, as shown in FIG. 2, the upstream end of the downstream side cylinder portion 133 of the exhaust cylinder 13 is bent downward and fitted to the upper end of the upright cylinder portion 132. When the position of the supply / exhaust cylinder is shifted up and down, the downstream cylinder section 133 is adjusted in the vertical direction by sliding the upstream end of the downstream cylinder section 133 with respect to the standing cylinder section 132, and the downstream cylinder The downstream end of the portion 133 can be connected to the inner exhaust cylinder portion of the supply / exhaust cylinder. In addition, in order to prevent the downstream side cylinder part 133 from coming off from the standing cylinder part 132, the annular part on the upper outer surface of the standing cylinder part 132 is engaged with the bent part downward from the upstream end of the downstream side cylinder part 133. A stopper 136 having a plurality of claw pieces 136a is mounted.

  Further, when the position of the supply / exhaust cylinder is shifted laterally, the downstream cylinder part 133 is turned around the axis of the standing cylinder part 132 so that the downstream end of the downstream cylinder part 133 is aligned with the supply / exhaust cylinder. It is possible to do. However, in this case, since the axis of the downstream cylinder part 133 is obliquely crossed with respect to the axis of the supply / exhaust cylinder, the downstream cylinder part 133 cannot be well connected to the inner exhaust cylinder part of the supply / exhaust cylinder. When it is forcibly connected, a force is applied to the upright tube portion 132 via the downstream tube portion 133 so as to displace it in the lateral direction. When the horizontal cylinder 131 and the standing cylinder 132 of the exhaust cylinder 13 are integrated, a bending moment around the axis of the horizontal cylinder 131 constrained by the normal phase is generated between the standing cylinder 132 and the downstream cylinder 133. Acts on the upstream end, adversely affecting durability.

  Therefore, in the present embodiment, the horizontal cylindrical portion 131 and the standing cylindrical portion 132 are separated. An elbow part 132a that is bent in the horizontal direction is provided at the lower end of the standing cylinder part 132, and the tip of the elbow part 132a is fitted to the downstream end of the horizontal cylinder part 131 so as to be relatively rotatable within a predetermined angle range. According to this, the downstream side cylinder part 133 is translated in the lateral direction via the standing cylinder part 132 by the rotation of the elbow part 132a with respect to the horizontal cylinder part 131. Therefore, even if the position of the air supply / exhaust cylinder is shifted in the lateral direction, the downstream side cylinder part 133 is aligned with the coaxiality with respect to the air supply / exhaust cylinder, and the downstream end of the downstream side cylinder part 133 is aligned with the air supply / exhaust cylinder. It can be connected to the exhaust pipe part inside Therefore, it is possible to prevent a bending moment from acting on the upstream ends of the upright tube portion 132 and the downstream tube portion 133.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the attachment tool 135 is fixed to the partition plate 2c, which is a built-in product in the container 1, but the attachment tool 135 can be fixed to the container 1 depending on the layout of the exhaust pipe 13. is there.

  Moreover, in the said embodiment, although the non-circular cross-sectional part is formed in the shape which has two plane parts, the lower plane part 131b used as the connection part of the drain pipe 134, and the upper plane part 131c parallel to this, this, It is also possible to form other shapes, for example, a D-shaped non-circular cross-sectional portion in which the upper flat portion 131c is omitted. It is also possible to provide a non-circular cross section at the portion of the horizontal cylinder 131 that is remote from the connecting portion of the drain pipe 134. However, according to the above-described embodiment, the horizontal cylindrical portion 131 can be phased by the attachment 135 so that the connecting portion is positioned at the lowermost portion of the cross section at the connecting portion of the drain pipe 134, thereby improving the accuracy of phasing. This is advantageous.

  Moreover, although the said embodiment applies this invention to the attachment structure of the exhaust pipe with a drain pipe provided in a fireplace type heater, the attachment structure of the exhaust pipe with a drain pipe of combustors other than a fireplace type heater is also applied. Similarly, the present invention can be applied.

The perspective view seen from the diagonally forward of the right side of the combustor which employ | adopted the attachment structure of the exhaust pipe with a drain pipe of this invention. The perspective view seen from the diagonally rear upper side of the left side of a combustor. The front view of the state which open | released the body front of a combustor, and the combustion housing front. FIG. 4 is a cut side view of the combustor cut at the position indicated by the line IV-IV in FIG. 3. Perspective view of the combustor exhaust stack and fixture separated Longitudinal sectional view of the exhaust pipe with attachments FIG. 7 is a transverse cross-sectional view of the exhaust stack attached at the position indicated by the line VII-VII in FIG. 6.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Container 2c ... Partition plate (built-in part), 13 ... Exhaust pipe, 131 ... Horizontal cylinder part, 131a ... Expanded diameter part (non-circular cross-section part), 131b ... Lower plane part, 131c ... Upper plane part, 131d ... Step portion, 132 ... Standing tube portion, 132a ... Elbow portion, 134 ... Drain pipe, 135 ... Fitting, 135g ... engagement portion.

Claims (4)

Installation of an exhaust pipe with a drain pipe provided in a combustor having a horizontal cylinder part on the upstream side and an upright cylinder part extending upward from the horizontal cylinder part, and a drain pipe extending downwardly connected to the horizontal cylinder part In structure
The horizontal cylindrical portion has a non-circular non-circular cross-sectional portion having a cross-sectional shape having at least one plane portion ,
A mounting tool having a plate portion that is in surface contact with the flat surface portion of the non-circular cross-section portion, mounted in a state of being prevented from rotating in the non-circular cross-section portion with respect to the horizontal cylinder portion,
The mounting tool is fixed to the combustor body or a built-in product in the body in a state in which the connecting portion of the drain pipe is in a normal phase where the connecting portion of the drain pipe is located at the lowermost portion of the horizontal cross section of the horizontal tube portion. An exhaust pipe mounting structure with a drain pipe.   A diameter-enlarged portion having a larger diameter than that of the other portion is formed in a part of the horizontal cylindrical portion, and a lower flat portion that is recessed below a portion other than the diameter-enlarged portion is formed in a lower portion of the enlarged-diameter portion, and the enlarged-diameter portion An upper flat portion parallel to the lower flat portion is formed on the upper portion of the slab, the non-circular cross-sectional portion is formed by the enlarged diameter portion, the drain pipe is connected to the lower flat portion, and the fixture is a non-circular cross-sectional portion. The drain pipe according to claim 1, wherein the fixture is fixed to the vessel body or the built-in product so that the lower plane portion is horizontal in the upper and lower plane portions. Exhaust tube mounting structure.   3. An exhaust pipe mounting structure with a drain pipe according to claim 2, wherein the fitting is provided with an engaging portion that engages with a step portion on the downstream side of the enlarged diameter portion. Mounting structure of exhaust pipe with pipe.   The horizontal tube portion and the standing tube portion are configured separately, and an elbow portion that is bent in the horizontal direction is provided at the lower end of the standing tube portion, and the tip of the elbow portion is relatively rotatable to the downstream end of the horizontal tube portion. The exhaust pipe mounting structure with a drain pipe according to any one of claims 1 to 3, wherein the exhaust pipe is fitted to the exhaust pipe.

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