JP5302237B2 - Plate burner - Google Patents

Description

  The present invention comprises a box-shaped burner body having an open top surface and a combustion plate attached to the open surface of the burner body, and the air-fuel mixture passes through a number of flame holes formed in the combustion plate from within the burner body. The present invention relates to a plate-type burner that jets and burns.

  Conventionally, as this type of plate-type burner, a flange portion surrounding the open surface is formed on the upper surface of the burner body, and the outer edge portion of each combustion plate is placed on the flange portion via an annular packing. It is known that the packing is compressed by pressing the outer edge portion downward with a pressing plate to ensure the sealing performance between the burner body and each combustion plate (see, for example, Patent Document 1).

  In such a plate-type burner, a plurality of combustion plates may be mounted side by side on the open surface of the burner body. In this case, in order to prevent gas leakage from the abutting portion between the combustion plates, it is necessary to press the combustion plates positioned on both outer sides in the alignment direction among the plurality of combustion plates to the inner side in the alignment direction by the spring members. For this reason, the number of parts increases, resulting in an increase in cost.

JP 2004-333099 A

  This invention makes it the subject to provide the low-cost plate type burner which enabled it to prevent the gas leak from the butt | matching part of combustion plates without using a spring member in view of the above point.

  In order to solve the above problems, the present invention comprises a box-shaped burner body having an upper surface as an open surface, and a plurality of combustion plates mounted side by side on the open surface of the burner body. It is a plate type burner which is ejected through a number of flame holes formed in the combustion plate and burns, and a flange portion surrounding the open surface is formed on the upper surface of the burner body, and each flange is provided on the flange portion via a packing. The flange part is mounted on the outer edge part of the combustion plate, and compresses the packing by pressing the outer edge part of the combustion plate downward with a presser plate to ensure the sealing performance between the burner body and each combustion plate. Is formed in a stepped shape with the inner part near the open surface being lower than the outer part, and the vertical step between the inner part and the outer part is the end of the outer edge of each combustion plate The gap is formed at a position where a gap narrower than the thickness of the packing in the free state is formed between the gap and the stepped portion, and the packing is formed so as to protrude from the inner portion of the flange portion to the outer portion beyond the stepped portion. It is characterized by being.

  According to the present invention, when the outer edge portion of each combustion plate is pressed downward by the holding plate, the packing is compressed between the inner portion of the flange portion and the lower surface of the outer edge portion of each combustion plate, and the outer edge of each combustion plate. The packing is also compressed between the end face of the portion and the step portion of the flange portion, and the sealing performance between the burner body and each combustion plate is improved. In addition, the combustion plates located on both outer sides of the plurality of combustion plates are arranged on the inner side in the arrangement direction due to the compression reaction force of the packing between the end surface of the outer edge portion on the outer side in the arrangement direction of the combustion plates and the stepped portion. Pressed. Therefore, without using a spring member, it is possible to prevent gas leakage from the abutting portion between the combustion plates, thereby reducing the number of parts and reducing the cost.

  By the way, the open surface of the burner body and each combustion plate are generally formed in a square shape in plan view. In this case, if the corner portion between the end surface of the outer edge portion of the combustion plate located on both outer sides of the plurality of combustion plates in the alignment direction and the end surface of the outer edge portion parallel to the alignment direction is square, When the packing is pulled in between the corner of the combustion plate and the corner of the step located on the outside by pressing downward, the surplus portion of the packing gathers on the lower surface of the corner of the combustion plate and the soot is shifted , Sealability deteriorates.

  Therefore, it is desirable that the corner portions of the combustion plates positioned on both outer sides in the arrangement direction among the plurality of combustion plates are formed in a chamfered shape. According to this, the clearance gap between the corner part of a combustion plate and the corner part of the level | step-difference part located in the outer side becomes large, and the surplus part of packing is received in this clearance gap. Therefore, the surplus portion of the packing does not collect on the lower surface of the corner portion of the combustion plate, and wrinkles do not approach, and a good sealing property between the burner body and the combustion plate can be ensured.

  In the present invention, it is desirable to form a chamfered portion at the upper edge of the stepped portion of the flange portion. According to this, when the packing is pulled between the stepped portion and the outer edge portion end surface of the combustion plate by being pressed downward of the combustion plate, it is possible to prevent the packing from being caught by the corner of the upper edge of the stepped portion and being damaged. .

  In the present invention, it is preferable that an adhesive is applied to the lower surface of the packing, and the packing is bonded to at least one of the inner portion and the outer portion of the flange portion. According to this, when the combustion plate is set on the packing, the packing can be prevented from being displaced, and workability is improved.

Sectional drawing which shows the structure and assembly procedure of the plate type burner of 1st Embodiment of this invention. The top view which shows the burner main body of the plate type burner of FIG. Sectional drawing of the decomposition | disassembly state of the plate type burner of 2nd Embodiment.

  1 and 2, reference numeral 1 denotes a burner body of a plate type burner. The burner body 1 is a cast product made of a metal such as an aluminum alloy, and is formed in a box shape with an upper surface having an open surface 1a having a square shape in plan view. On the open surface 1a, two combustion plates 2 and 2 having a square shape in plan view are mounted side by side. Each combustion plate 2 is made of ceramics and has a large number of flame holes 2a. An air-fuel mixture (mixed gas of fuel gas and primary air) is supplied into the burner main body 1 through a mixing pipe section (not shown), and the air-fuel mixture passes through the flame holes 2a of the combustion plates 2 from the burner main body 1. Squirts through and burns.

  On the upper surface of the burner body 1, a flange portion 3 is formed so as to surround the open surface 1a. And the outer edge part of each combustion plate 2 is mounted on the flange part 3 via the rectangular annular packing 4 formed with a kao wool etc., and the outer edge part of each combustion plate 2 is below by the rectangular annular pressing plate 5 The packing 4 is compressed by pressing, and the sealing performance between the burner body 1 and each combustion plate 2 is ensured. The packing 4 can be punched in a rectangular ring shape, but the rectangular ring packing 4 may be formed by combining two packings punched in an L shape. Further, another packing 6 is interposed at the abutting portion between the combustion plates 2 and 2.

  The flange part 3 is formed in a stepped shape in which the inner part 3a near the open surface 1a is lower than the outer part 3b, and a vertical step part 3c is provided between the inner part 3a and the outer part 3b. A plurality of screw holes 3d are formed in the outer portion 3b.

  The packing 4 is formed in such a size as to protrude from the inner part 3a of the flange part 3 over the step part 3c to the outer part 3b and cover the screw hole 3d. A through hole 4a is formed in the portion of the packing 4 that matches the screw hole 3d.

  The presser plate 5 is also formed with a through hole at a portion that matches the screw hole 3d. The screw 5a that is tightened into the screw hole 3d through this through hole and the through hole 4a of the packing 4 causes the presser plate 5 to be flanged. 3. Further, on the upper surface of the outer edge portion of each combustion plate 2, a pressing surface 2b lower than the upper surface of the flame hole forming region of the combustion plate 2 is formed by cutting. Then, an engaging portion 5b that rises upward and engages the pressing surface 2b is formed on the inner edge portion of the pressing plate 5, and when the pressing plate 5 is fastened to the flange portion 3, The outer edge of the combustion plate 2 is pressed downward. In addition, by making the holding surface 2b lower than the flame hole forming region, the engaging portion 5b of the holding plate 5 that engages with the holding surface 2b is separated from the flame generated on the flame hole forming region, and the holding plate 5 Thermal deformation is suppressed, and the combustion plate 2 can be stably pressed.

  Here, the stepped portion 3c of the flange portion 3 is formed at a position where a gap a narrower than the thickness t in the free state of the packing 4 is formed between the end surface of the outer edge portion of each combustion plate 2 and the stepped portion 3c. The For example, when the thickness t in the free state of the packing 4 is 2 mm, the position of the stepped portion 3c is set so that the gap a between the end surface of the outer edge portion of the combustion plate 2 and the stepped portion 3c is 1 mm. The

  Further, a C-shaped chamfered portion 3e is formed on the upper edge of the stepped portion 3c. Further, as shown in FIG. 2, the end surfaces of the outer edges of the combustion plates 2 on the outer side in the alignment direction (the left end surface for the left combustion plate 2 and the right end surface for the right combustion plate 2) are parallel to the alignment direction. The corner portion 2c with the end surface of the outer edge portion is formed in a C-shaped chamfered shape. Note that the chamfered portion 3e and the corner portion 2c may be formed in an R shape.

  When assembling the plate type burner, first, as shown in FIG. 1A, the packing 4 is placed on the flange portion 3, and then, as shown in FIG. The outer edge portion of each combustion plate 2 is placed on the packing 4 with the packing 6 interposed between the two butting portions. Finally, as shown in FIG. 1 (c), the holding plate 5 is fastened to the flange portion 3, and the outer edge portion of each combustion plate 2 is pressed downward.

  At this time, the packing 4 is compressed between the inner portion 3 a of the flange portion 3 and the lower surface of the outer edge portion of each combustion plate 2, and between the outer edge portion end surface of each combustion plate 2 and the step portion 3 c of the flange portion 3. Since the gap a is narrower than the thickness t in the free state of the packing 4, the packing 4 is compressed even in this portion, and the sealing performance between the burner body 1 and each combustion plate 2 is improved. Further, each combustion plate 2 is pressed inward in the alignment direction by the compression reaction force of the packing 4 between the end surface of the outer edge portion on the outer side in the alignment direction and the stepped portion 3c. Therefore, even without using a spring member that presses each combustion plate 2 inward in the alignment direction, the packing 6 interposed in the abutting portion between the combustion plates 2 and 2 is sufficiently compressed, and gas leakage from the abutting portion is prevented. Can be prevented. Therefore, no spring member is required, and the number of parts can be reduced to reduce the cost.

  Further, in order to form the chamfered portion 3e on the upper edge of the stepped portion 3c, when the packing 4 is pulled between the stepped portion 3c and the outer edge portion end surface of the combustion plate 2 by pressing the combustion plate 2 downward, the packing 4 4 can be prevented from being caught and damaged by the corner of the upper edge of the step 3c.

  Furthermore, since the corner portion 2c on the outer side in the arrangement direction of the combustion plates 2 is formed in a chamfered shape, a gap between the corner portion 2c and the corner portion 3f of the stepped portion 3c located outside thereof is widened. And the surplus part of the packing 4 which arises with the drawing of the packing 4 to the corner part 3f of the level | step-difference part 3c is received in this clearance gap. Accordingly, the surplus portion of the packing 4 does not collect on the lower surface of the corner portion 2c of the combustion plate 2 and the wrinkles do not approach, and the sealing performance between the burner body 1 and the combustion plate 2 can be ensured satisfactorily.

  Next, a second embodiment shown in FIG. 3 will be described. The basic structure of the second embodiment is the same as that of the first embodiment, but differs in the following points. That is, in the second embodiment, an adhesive is applied to the lower surface of the packing 4, and the packing 4 is bonded in advance to the inner portion 3a and the outer portion 3b of the flange portion 3.

  According to this, when each combustion plate 2 is set on the packing 4, it can prevent that the packing 4 shifts | deviates, and workability | operativity improves. The packing 4 may be bonded to only one of the inner part 3a and the outer part 3b of the flange part 3.

  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-described embodiment, the number of the combustion plates 2 is two, and the combustion plates located on both outer sides in the arrangement direction are the two combustion plates 2, 2. However, when three or more combustion plates are mounted side by side on the open surface 1a of the burner body 1, only the two combustion plates located on both outer sides in the alignment direction are formed. The corner part on the outside in the arrangement direction is chamfered.

  Further, in the present invention, the upper surface of the burner body 1 is the open surface 1a, but the vertical direction does not define the direction when the burner is used, but the burner is used in an upward posture with the combustion plate 2 facing upward. In addition, a burner used in a downward posture with the combustion plate 2 facing downward or in a lateral posture with the combustion plate 2 facing laterally is also included in the burner of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Burner main body, 1a ... Open surface, 2 ... Combustion plate, 2a ... Flame hole, 2c ... Corner part, 3 ... Flange part, 3a ... Inner part, 3b ... Outer part, 3c ... Step part, 3e ... Chamfering part, 4 ... packing, 5 ... presser plate.

Claims (4)

It has a box-shaped burner body with the upper surface as an open surface, and a plurality of combustion plates mounted side by side on the open surface of the burner body, and the air-fuel mixture passes through the numerous flame holes formed in each combustion plate from within the burner body. A plate-type burner to be ejected and burned,
A flange portion surrounding the open surface is formed on the upper surface of the burner body, and the outer edge portion of each combustion plate is placed on the flange portion via an annular packing, and the outer edge portion of each combustion plate is lowered with a presser plate. In order to compress the packing by pressing and ensure the sealing performance between the burner body and each combustion plate,
The flange portion is formed in a stepped shape in which the inner portion near the open surface is lower than the outer portion, and the step portion in the vertical direction between the inner portion and the outer portion is stepped from the end surface of the outer edge portion of each combustion plate. Formed in a position that creates a gap narrower than the thickness of the packing in the free state between
The plate burner is characterized in that the packing is formed in such a size as to protrude from the inner part of the flange part to the outer part beyond the step part. The plate burner according to claim 1, wherein the open surface and each combustion plate are formed in a square shape in plan view.
A corner portion between the end surface of the outer edge portion of the combustion plate located on both outer sides of the plurality of combustion plates in the alignment direction and the end surface of the outer edge portion parallel to the alignment direction is formed in a chamfered shape. The plate type burner according to claim 1.   The plate-type burner according to claim 1, wherein a chamfered portion is formed at an upper edge of the stepped portion.   The plate burner according to any one of claims 1 to 3, wherein an adhesive is applied to a lower surface of the packing, and the packing is bonded to at least one of an inner portion and an outer portion of the flange portion. .

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