JP5112405B2 - Burner, gas firing device - Google Patents

Description

  The present invention relates to a burner used in a baking process or baking process for bread, confectionery, etc., and a gas baking apparatus including a burner.

  Conventionally, with respect to a gas baking apparatus mainly used in a baking process included in a manufacturing process for bread, confectionery, etc., one or more burners are placed on the upper side with respect to the transfer surface in which the object to be baked in the combustion chamber is transferred in the transfer direction Are installed at positions separated by a predetermined distance and at positions separated by a predetermined distance on the lower side. The burner is injecting a mixed gas, and together with the secondary air separately jetted, the burner ignites by an igniter to generate a flame, and the object to be fired is fired by the flame heat or radiant heat generated by the flame. To be done.

  As such a gas firing device, for example, a device described in Patent Document 1 has been proposed. In the gas baking apparatus described in Patent Document 1, one or more burners are extended in a direction perpendicular and horizontal to the direction in which the object to be fired is conveyed.

  This burner includes a combustion part and a conduit part that are continuous in the extending direction. The combustion section is provided with a mixed gas ejection section that ejects a mixed gas in which fuel and primary air are mixed, and a secondary air ejection section that ejects secondary air in an insertion slit and an inner pipe provided in the pipe. It consists of a combination of slits. The combustion section includes a supply section that supplies the mixed gas to the mixed gas ejection section and the secondary air to the secondary air ejection section independently. The conduit portion has a function of introducing the mixed gas and the secondary air independently into the supply portion of the combustion portion.

  In the supply part and the conduit part of the combustion part of the burner described in Patent Document 1, the insides of the respective pipes constituting the supply part and the conduit part are defined in two parts by the inner pipe described above. One and the other parts defined in the pipe have a function of independently supplying or introducing the mixed gas and the secondary air.

JP 2004-286362 A

  However, in the above-described prior art, the mixed gas ejection part and the secondary air ejection part are configured by the combination of the inserted slit and the slit, and the mixed gas ribbon for rectifying the mixed gas inside the mixed gas ejection part, When fixing the secondary air rectifying ribbon that rectifies the secondary air inside the secondary air ejection section, a configuration using a slit opening prevention pin that prevents the gap between the slits to be inserted in the pipe was used. Such a problem arises.

  First, the mixed gas ribbon and the secondary air ribbon for performing rectification of the mixed gas and rectification of the secondary air in the space in the mixed gas ejection part and the secondary air ejection part are essential components, and the mixed gas ribbon The ribbon stopper pin for fixing the secondary air ribbon to the slit is also an essential component, but the slit stopper pin for preventing the insertion slit from being opened is not an essential component. For this reason, the slit opening prevention pin which is not an essential essential component is present in the mixed gas ejection portion and the secondary air ejection portion.

  Here, in order to prevent the slit opening pin from opening the inserted slit of the pipe, the axial strength to be provided is that the ribbon holding pin for fixing the mixed gas ribbon and the secondary air ribbon to the slit is essential. In general, the cross-sectional area of the slit stopper pin needs to be larger than the cross-sectional area of the ribbon stopper pin.

  For this reason, the slit opening stopper pin having a strength higher than the axial strength essential to the ribbon stopper pin for fixing the rectifying ribbon and the secondary air ribbon to the slit includes the mixed gas ejection portion and the secondary air ejection portion. Since it exists inside, the problem of causing the flow of mixed gas and secondary air unnecessarily is caused.

  Furthermore, considering the assembly process of the burner itself, the insertion slit is provided by piping, for example, by cutting, and an inner pipe is formed by bending a plate-like member, and the mixed gas ribbon is inserted into the slit of the inner pipe Then, after the secondary air ribbon is arranged on the outer surface of the slit, it is necessary to insert the slit, the mixed gas ribbon, and the secondary air ribbon into the insertion slit integrally, and to insert the slit opening stopper pin.

  For this reason, it is essential that the mixed gas ribbon and the secondary air ribbon are fixed to the slit and the inner pipe is fixed to the pipe at the same time. There also arises a problem that it is difficult to achieve high combustion performance.

  In view of the above problems, an object of the present invention is to provide a burner that can realize higher combustion performance and a gas baking apparatus including the burner.

In order to solve the above problems, the burner according to the present invention is:
A slit part constituting a mixed gas jetting part for jetting a mixed gas in which fuel and primary air are mixed;
The inserted slit portion constituting the secondary air ejection portion that inserts the slit portion and ejects secondary air into the gap between the slit portion, and
Including a pipe including the inserted slit portion, and a mixed gas ribbon for rectifying the mixed gas in the mixed gas ejection portion;
A secondary air ribbon for rectifying the secondary air in the secondary air ejection portion;
Ribbon fixing means for fixing one or both of the mixed gas ribbon and the secondary air ribbon only to the slit portion is included.

  Here, the secondary air is separately blown from the secondary air separately from the primary air previously contained in the mixed gas for the purpose of completely burning the mixed gas, that is, to promote complete combustion. It is ejected from the part.

  According to the burner, it is necessary and sufficient that the ribbon stopper means has a strength for fixing the mixed gas ribbon or the secondary air ribbon only to the slit portion. Occupied space can be minimized. In particular, since the occupied space of the ribbon stopping means in the mixed gas jetting part and / or the secondary air jetting part can be further reduced, the jetting of the mixed gas and / or the secondary air and the propagation of the flame are prevented. As a smoother one, the combustion efficiency of the burner can be further increased to improve the combustion performance.

Here, in the burner,
It is preferable that the ribbon fixing unit and an insertion hole through which the ribbon fixing unit of the slit portion is inserted are airtightly joined.

  According to the burner, in the manufacturing process of the burner, in the step of fixing the mixed gas ribbon to the slit portion by the ribbon fixing means, the insertion hole for inserting the ribbon fixing means through the ribbon fixing means of the slit portion For example, it is possible to seal the gap between the insertion hole and the ribbon stopper means by welding, for example, by welding, and the mixed gas ejection part and the secondary air ejection part located inside and outside the slit part. , Can be spatially and airtightly isolated.

  Thereby, in the burner, when the pressure of the mixed gas is higher than that of the secondary air, the mixed gas flows into the secondary air ejection portion through the space between the insertion hole and the ribbon stopper. Can be prevented. Similarly, when the pressure of the secondary air is higher than that of the mixed gas, the secondary air is prevented from being mixed into the mixed gas ejection portion through the space between the insertion hole and the ribbon stopper. Can do. By these things, the combustion efficiency and combustion performance of the burner can be further enhanced.

Here, in the burner,
The ribbon stopper may fix the mixed gas ribbon to the slit portion, and the secondary air ribbon may be bonded to the outer surface of the slit portion.

  According to the burner, it is possible to prevent the ribbon stopping means from being located in the secondary air ejecting portion and hindering the ejection of the secondary air, and to connect the ribbon stopping means to the slit portion of the slit portion. The operation of airtightly joining the insertion hole can be performed more easily before the secondary air ribbon is joined to the slit portion, and the manufacturing process can be more efficiently performed.

Furthermore, in the burner,
It is preferable that it includes slit opening preventing means for preventing the inserted slit portion from opening, and the ribbon stopping means and the slit opening preventing means are constituted by separate members.

  According to the burner, the slit opening preventing means prevents the gap formed by the inserted slit portion of the pipe constituting the burner from becoming mainly due to accumulation of thermal strain, and the ribbon stopping means. Since the slit opening preventing means can be made independent of each other, the degree of freedom of arrangement of the ribbon stopping means and the slit opening stopping means in the pipe, and thus the degree of freedom of fitting, can be increased.

  At the same time, in particular, the ribbon stopping means is necessary and sufficient if it has the strength to fix the mixed gas ribbon or the secondary air ribbon only to the slit portion. Occupied space can be minimized. Thereby, the ejection of the mixed gas and / or the secondary air and the propagation of the flame are made smoother, and in particular, a portion where the mixed gas does not burn is generated on the downstream side of the ejection direction of the ribbon stopper. That can be prevented, and the effect of improving the combustion efficiency and thus the combustion performance can be further enhanced.

Here, in the burner,
It is preferable that the slit opening preventing means is configured on the outer peripheral side of the pipe.

  According to the burner, the occupied space in the pipe of the slit opening preventing means can be made zero.

  Furthermore, since the position of the ribbon stopper means in the pipe is not limited by interference with the slit opening stopper means, the degree of freedom of disposition of the ribbon stopper means in the pipe and thus the degree of freedom of fitting is further increased. be able to.

  Further, since the slit opening preventing means need not be passed through an inner pipe (to be described later) that defines a portion through which the mixed gas flows and a portion through which the secondary air flows in the pipe, the ribbon Similar to the airtight joining of the stopper means to the insertion hole of the slit portion, it is possible to eliminate the need to airtightly connect the slit opening stopper means to the inner pipe. As a result, the manufacturing process of the burner can be further simplified, and the flow between the mixed gas and the secondary air in the pipe can be completely blocked, so that the combustion efficiency and the combustion performance can be further improved. Can be increased.

Furthermore, in the burner,
The shape of the portion of the ribbon stopper that is located in the mixed gas ribbon or the secondary air ribbon has a length in the extending direction of the pipe, and a direction in which the mixed gas ejection portion ejects the mixed gas or It is preferable that the secondary air ejection portion has a flat shape shorter than the length in the direction in which the secondary air is ejected.

  According to the burner, it is possible to further reduce the projected area in the ejection direction in the mixed gas ejection portion or the secondary air ejection portion of the ribbon stopper. For this reason, the jetting of the mixed gas or the secondary air and the propagation of the flame can be made smoother, and the combustion efficiency of the burner can be further increased to improve the combustion performance.

In addition, in the burner,
The inner peripheral surface shape of the through hole through which the ribbon stopper means of the mixed gas ribbon or the secondary air ribbon passes is larger than the outer peripheral surface shape located on the inner peripheral side of the through hole of the ribbon stopper means. Is preferred.

  According to the burner, due to the gap passage formed between the inner peripheral surface of the through hole and the outer peripheral surface of the ribbon stopper, the substantial cross-sectional area of the flow path of the mixed gas in the mixed gas ejection portion or the Increasing the substantial cross-sectional area of the flow path of the secondary air in the secondary air ejection part, the flow of the mixed gas in the ejection direction in the mixed gas ejection part or the ejection direction in the secondary air ejection part By making the flow of secondary air smoother, the combustion efficiency and combustion performance of the burner can be further enhanced.

  In addition, the mixed gas can flow through the gap passage between spaces adjacent to each other in the stacking direction of the stacked unit mixed gas ribbons that constitute the mixed gas ribbon of the burner. Also by this, the flow of the mixed gas in the ejection direction in the mixed gas ejection portion can be made smoother. Similarly, the secondary air can flow through the gap passage between spaces adjacent to each other in the stacking direction of the stacked unit secondary air ribbons constituting the secondary air ribbon of the burner. As a thing, the flow of the secondary air in the ejection direction in the secondary air ejection portion can be further smoothed.

In the burner,
It is preferable that the outer peripheral surface shape located on the inner peripheral side of the insertion hole of the ribbon stopper is made to coincide with the inner peripheral surface shape of the insertion hole of the slit portion.

  According to the burner, the combustion by the gap passage between the outer peripheral surface located on the inner peripheral side of the through hole of the ribbon stopper and the inner peripheral surface of the through hole of the mixed gas ribbon or the secondary air ribbon It is possible to more easily join the ribbon stopper to the insertion hole of the slit portion in an airtight manner while ensuring improvement in efficiency and combustion performance.

The burner is
A mixed gas supply unit for supplying the mixed gas to the mixed gas ejection unit;
A secondary air supply unit that supplies the secondary air to the secondary air ejection unit;
A mixed gas introduction section for introducing the mixed gas into the mixed gas supply section;
It is preferable that a secondary air introduction unit that introduces the secondary air into the secondary air supply unit is included.

  According to the burner, application to the gas baking apparatus according to the present invention described below can be made easier.

In addition, in order to solve the above-described problem, a gas baking apparatus according to the present invention includes:
Including the burner,
A mixed gas injection section for injecting the mixed gas into the mixed gas introduction section;
A secondary air injection section for injecting the secondary air into the secondary air introduction section;
It includes a placement portion on which the object to be fired is placed.

  According to the gas baking apparatus of the present invention, by including the burner described above, similarly to the burner, the mixed gas and the secondary air can be smoothly ejected, and the combustion efficiency of the burner can be increased. Combustion performance can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the gas baking apparatus containing the burner which can implement | achieve higher combustion performance, and a burner can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing an embodiment of a burner and a gas baking apparatus according to the present invention when viewed from a direction perpendicular to the extending direction of the burner and parallel to a horizontal plane and from below. It is a schematic cross section which shows the structure in AA or BB cross section perpendicular | vertical to the extending direction in one Embodiment shown in FIG. 1 of the burner which concerns on this invention, and a gas baking apparatus. It is a schematic diagram which shows the upper view in one Embodiment shown in FIG. 2 of the burner and gas baking apparatus which concern on this invention. It is a schematic diagram which shows the form of the socket which one Embodiment of the burner which concerns on this invention, and a gas baking apparatus contains. It is a schematic diagram which shows the whole form of one Embodiment of the burner which concerns on this invention, and a gas baking apparatus. It is a schematic cross section which shows the other form in the cross section perpendicular | vertical to the extending direction of the burner which concerns on this invention, and a gas baking apparatus. It is a schematic cross section which shows the joining aspect of the component in piping of the burner which concerns on this invention, and a gas baking apparatus in a cross section perpendicular | vertical to an extension direction. It is a schematic cross section which shows the aspect of a part of component in piping of the burner which concerns on this invention, and a gas baking apparatus in a cross section perpendicular | vertical to an up-down direction. It is a schematic diagram which shows the one part aspect of the component in piping of the burner which concerns on this invention, and a gas baking apparatus. It is a schematic cross section which shows the aspect of a part of component in piping of the burner which concerns on this invention, and a gas baking apparatus in a cross section perpendicular | vertical to an up-down direction. It is a schematic diagram which shows the one part aspect of the component in piping of the burner which concerns on this invention, and a gas baking apparatus. It is a schematic diagram which shows the one part aspect of the component in piping of the burner which concerns on this invention, and a gas baking apparatus.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the burner 1 of the first embodiment includes a combustion part 2, a conduit part 3, a secondary air introduction external piping part 4, a socket 5, and a plate 6. In the following drawings, V indicates the jet direction of the mixed gas, S indicates the extending direction of the burner 1, and UP indicates the upward direction. That is, FIG. 1A shows a view of the burner 1 viewed from the ejection direction V, and FIG. 1B shows a view of the burner 1 viewed from below.

  As shown in FIG. 1, the combustion unit 2 extends in the extending direction S with a length of L1. As shown in FIGS. 1 and 2, the combustion section 2 includes a mixed gas ejection section 2 a that ejects a mixed gas in which fuel and primary air are mixed in the ejection direction V, and a secondary gas that ejects secondary air in the ejection direction V. The next air ejection part 2b is provided adjacent to the up-down direction UP.

  Further, as shown in FIG. 2, the combustion unit 2 includes a mixed gas supply unit 2c that supplies a mixed gas to the mixed gas injection unit 2a and a secondary air supply unit that supplies secondary air to the secondary air injection unit 2b. 2d. In addition, as shown in FIG. 1, the combustion unit 2 includes a secondary air connection portion 2 e to which the secondary air introduction external piping portion 4 is connected via a piping joint provided on the extending direction S side. The secondary air connection part 2e connects the secondary air introduction external piping part 4 and the secondary air supply part 2d in an airtight manner.

  As shown in FIG. 2, the combustion unit 2 includes a pipe 20 having a nominal diameter of 50 A, and the pipe 20 has a portion directed in the ejection direction V cut out in the entire axial direction, that is, the extending direction S. Thus, the notched portion constitutes an insertion slit portion 20a extending in the extending direction S. An inner pipe 21 is provided inside the pipe 20.

  As shown in FIG. 2, the inner pipe 21 is configured by bending a single metal plate. The inner pipe 21 defines a mixed gas supply part 2c on the inner side, a square columnar part 21a that defines a secondary air supply part 2d between the outer side and the inner peripheral surface of the pipe 20, and a rectangular columnar part The slit part 21b which consists of a pair of flat plate which comprises the mixed gas ejection part 2a extended upwards from the upper end of 21a is included.

  The outer surface on the opposite side of the slit portion 21b of the square columnar portion 21a of the inner pipe 21 has an inner pipe bracket 22 formed by bending a single metal plate as shown in FIG. 2 into a V shape. 2, the pipe 20 is brought into contact with two places in the vertical direction on the inner peripheral surface in FIG. 2 and a total of three places opposite to the ejection direction V. The inner pipe bracket 22 is intermittently and partially disposed in the extending direction S as shown in FIG. Therefore, in FIG. 2, the inside of the pipe 20 is not defined by the inner pipe bracket 22, and the outer peripheral side of the square columnar portion 21a constitutes the secondary air supply portion 2d.

  Further, on the most upstream side of the secondary air supply part 2d defined between the outer side of the square columnar part 21a of the inner pipe 21 and the inner peripheral surface of the pipe 20, the secondary air supply part 2d to the conduit part 3 are provided. In order to prevent both the secondary air from being mixed in and the mixed gas from the conduit portion 3 to the secondary air supply portion 2d, the inside of the conduit portion 3 is appropriately closed by an appropriate closing means. Is hermetically closed and defined. This closing means may be constituted by, for example, the plate 6 or may be appropriately constituted by other members.

  Further, the slit portion 21b is inserted while being unevenly distributed to the left of the inserted slit portion 20a in FIG. 2 so that the outer surface of the left flat plate in FIG. 2 contacts the inserted slit portion 20a. 2, the gap between the flat plate on the right side, that is, the upper side, and the insertion slit portion 20a constitutes a secondary air ejection portion 2b that ejects secondary air.

  That is, the lower gap between the left side of FIG. 2, that is, the lower flat plate and the inserted slit 20 a in FIG. 2 is set to zero, and the upper gap is set to be larger than the lower gap. The air ejection part 2b is provided on the right side in FIG. 2, that is, only on the upper UP side with respect to the mixed gas ejection part 2a.

  In the gap between the pair of flat plates of the slit portion 21b of the inner pipe 21 shown in FIG. 2, a mixed gas ribbon 23 for rectifying the mixed gas is installed, and on the outer surface of the flat plate on the right side of the slit portion 21b in FIG. A secondary air ribbon 24 for rectifying the secondary air is installed.

  In addition, the detailed form of the mixed gas ribbon 23 is one in which the unit mixed gas ribbons 23-1 having a wavefront shape as shown in FIG. 3 are further stacked, and the secondary air ribbon 24 is also shown in FIG. As described above, the unit secondary air ribbon 24-1 is stacked one or more layers. Here, it is assumed that the amplitude of the wavefront shape of the unit mixed gas ribbon 23-1 is larger than the amplitude of the wavefront shape of the unit secondary air ribbon 24-1, and the number of stacked unit mixed gas ribbons 23-1 is also as follows. The number of unit secondary air ribbons 24-1 is larger than the number of stacked layers.

  Further, in the slit portion 21b of the inner pipe 21, a ribbon stopper pin insertion hole 21c for inserting a cylindrical rod-shaped ribbon stopper pin 25 as a ribbon stopper means shown in FIG. 2 is directed in the left-right direction in FIG. It is drilled to do. Further, the mixed gas ribbon 23 is provided with a ribbon stop pin through hole 23a at a position corresponding to the ribbon stop pin insertion hole 21c, and the secondary air ribbon 24 is also at a position corresponding to the ribbon stop pin insertion hole 21c. Ribbon retaining pin through hole 24a is formed.

  After the mixed gas ribbon 23 is inserted into the slit portion 21b and the ribbon retaining pin insertion hole 21c and the ribbon retaining pin through hole 23a are aligned, the ribbon retaining pin is inserted into the ribbon retaining pin insertion hole 21c and the ribbon retaining pin through hole 23a. 25 is inserted, and the right end of the ribbon retaining pin 25 is positioned so as to protrude rightward from the right side surface of the slit portion 21b in FIG. Thereafter, the outer peripheral surface of the ribbon retaining pin 25 and the inner peripheral surface of the ribbon retaining pin insertion hole 21c of the inner pipe 21 are airtightly joined by welding or the like, and the ribbon retaining pin insertion hole 21c is sealed or closed. .

  A ribbon retaining pin through hole 24a of the secondary air ribbon 24 is inserted into the right end portion of the ribbon retaining pin 25 that protrudes to the right from the right side surface of the slit portion 21b in FIG. 2 is moved from the right side to the left side in FIG. 2, and the left side surface of the secondary air ribbon 24 is brought into contact with the right side surface of the slit portion 21b for positioning.

  Thereafter, the top of the ribbon retaining pin 25 in the axial direction shown in FIG. 2 is formed by an appropriate means such as striking or pressing, or the top of the head is joined by welding or the like. Thereby, the mixed gas ribbon 23 and the secondary air ribbon 24 are restrained and fixed in the left-right direction in FIG.

  Here, the mixed gas ribbon 23 and the secondary air ribbon 24 are fixed only to the slit portion 21 b and the inner pipe 21 by the ribbon fixing pin 25, and not to the pipe 20.

  Further, a slit opening shown in FIG. 2 is provided in a portion adjacent to the quadrangular columnar portion 21a of the slit portion 21b and a portion located on the upper side in FIG. 2, that is, on the ejection direction V side from the center of the pipe 20 shown in FIG. A slit opening prevention pin insertion hole 21d and a slit opening prevention pin insertion hole 20b through which a slit opening prevention pin 26 as a stopper is inserted in the left-right direction are respectively formed on the same axis.

  The slit portion 21b of the inner pipe 21 that integrally includes the mixed gas ribbon 23 and the secondary air ribbon 24 by the above-described process is inserted into the insertion slit portion 20a of the pipe 20 from the extending direction S. After that, the slit opening stopper pin 26 is inserted in the slit opening pin insertion hole 20b and the slit opening prevention pin insertion hole 21d in the left-right direction in FIG. Are formed by appropriate means such as striking or pressing, or the crown is joined by welding or the like.

  As a result, the inner pipe 21 is fixed and fixed to the pipe 20 in the left-right direction, that is, the vertical direction in FIG. 2, and the slit opening pin 26 is restrained from the left and right sides by the pair of right and left heads in FIG. 2. Based on the force, the insertion slit portion 20a of the pipe 20 is prevented from opening in the left-right direction in FIG.

  The conduit part 3 and the combustion part 2 are coaxially arranged in this order in this order from the front side in the extending direction S in FIG. Similarly, the upstream side conduit part 31 and the downstream side conduit part 32 which comprise the conduit part 3 are also arrange | positioned coaxially in this order. The upstream side conduit portion 31 is constituted by, for example, a pipe having a nominal diameter of 40A, and the upstream side portion of the downstream side conduit portion 32 is also constituted by a pipe having a nominal diameter of 40A.

  On the outer peripheral surface of the downstream end portion of the upstream conduit portion 31 and the outer peripheral surface of the upstream end portion of the downstream conduit portion 32, there are female screw portions formed on the inner peripheral surface of the socket 5 as shown in FIG. A threaded male thread portion is formed. FIG. 4 is a schematic diagram showing the form of the socket 5 included in the burner 1 of the first embodiment. The nominal diameter D, the axial length L, and the inner diameter d2 of the socket 5 shown in FIG. 4 are determined by, for example, JIS standards.

  By screwing the female screw portion of the socket 5 into the male screw portion provided at the downstream end portion of the upstream conduit portion 31 and the upstream end portion of the downstream conduit portion 32 during the assembly process or the like, the upstream conduit The downstream end of the portion 31 and the upstream end of the downstream conduit portion 32 are detachably and airtightly connected. That is, the socket 5 constitutes a connection portion that connects the upstream conduit portion 31 and the downstream conduit portion. The upstream conduit portion 31 and the downstream conduit portion 32 are connected by the socket 5 to form the conduit portion 3, and the conduit portion 3 has a length of L2 as a whole in the extending direction S.

  Further, the downstream portion of the downstream conduit portion 31 includes a diameter-expanding portion that gradually increases in diameter toward the downstream side, that is, the extending direction S, and a large-diameter portion that has the same diameter as the pipe 20. The downstream end portion, that is, the large diameter portion of the downstream conduit portion 31 is welded in advance to the upstream end portion of the pipe 20 constituting the combustion section 2 via the annular plate 6 having the same cross-sectional shape as the pipe 20. Joined at the time of manufacture. That is, the plate 6 constitutes a joint part that joins the combustion part 2 and the downstream conduit part 32.

  An upstream end portion 31e of the upstream conduit portion 31 of the conduit portion 3 shown in FIG. 1 is fixed to the disc-like substrate 7 so as to penetrate from the left to the right in FIG. The upstream end 4e of the secondary air introduction external piping part 4 is in airtight communication with a secondary air injection part 8 provided on the substrate 7 via a pipe joint.

  An output port of the gas mixer 9 is airtightly connected to the upstream end 31e. One of the two input ports of the gas mixer 9 is air-tightly connected to an air pipe (not shown), and a blower (not shown) is connected to the upstream side of the air pipe. The other input port of the gas mixer 9 is fuel-tightly connected to the fuel pipe. The gas mixer 9 constitutes a mixed gas injection part that mixes primary air from the air pipe and fuel from the fuel pipe, outputs a mixed gas from the output port, and injects it into the upstream pipe part 31 of the conduit part 3. .

  An air pipe (not shown) is connected to the secondary air injection unit 8, and a blower (not shown) is connected to the upstream side of the air pipe. The air pipe (not shown) connected to the gas mixer 9 and the air pipe connected to the secondary air introduction external pipe section 4 may be the same system or different systems. Further, an igniter 10, that is, an ignition device, is installed on the substrate 7 in parallel with the conduit portion 3 and the secondary air introduction external piping portion 4.

  Next, the gas baking apparatus S1 including the burner 1 described above will be described with reference to the drawings. FIG. 5 is a schematic diagram illustrating the gas baking apparatus S1 according to the first embodiment. The gas baking apparatus S1 includes one or more burners 1 as shown in FIG. 1, and includes a gas mixer 9 that constitutes a mixed gas injection unit that injects a mixed gas into the upstream conduit portion 31, and a secondary air introduction external piping unit 4 includes a secondary air injecting section 8 for injecting secondary air, and a belt 102 of a belt conveyor constituting a placing section for placing an object to be fired 101 as shown in FIG. The conveying direction of the belt 102 is a direction from left to right as shown in FIG. 5, and the burner 1 is arranged in parallel at equal intervals in the conveying direction at two upper and lower portions of the belt 102, and the ejection direction V of the burner 1 is The direction is the same as the transport direction.

  As shown in FIG. 5, the gas baking apparatus S1 further includes a baking chamber 103 that defines the air outside the gas baking apparatus S1 in the factory and the air inside the gas baking apparatus S1. An object 101 to be fired before firing is conveyed into the firing chamber 103 from the entrance 104 of the firing chamber 103 by the belt 102 of the belt conveyor.

  Due to the flame generated when the mixed gas ejected from the mixed gas ejection part 2a of the burner 1 and the secondary air ejected from the secondary air ejection part 2b are ignited by the spark of the igniter 10. Due to the heat and radiant heat, the object to be fired 101 on the belt 102 is subjected to the preheating, firing and coloring / drying processes in the combustion chamber 103.

  More specifically, it is preheated in the area A shown in FIG. 5 defined on the left side of the partition wall 105 and fired in the area B defined by the partition walls 105 and 106, and rightward from the partition wall 106. Colored and dried in area C defined by The object to be fired 101 after the above-described three steps is carried out is carried out by the belt 102 from the carry-out port 107 of the baking chamber 103. Air including exhaust gas generated after combustion of the mixed gas and secondary air after combustion in the combustion chamber 103 is appropriately discharged from the firing chamber 103 by the exhaust duct 108 and the exhaust fan 109.

  According to the burner 1 and the gas baking apparatus S1 including the burner 1 of the first embodiment described above, the following operational effects can be obtained.

  First, since the ribbon stopper pin 25 is not shared with the slit stopper pin 26, the strength to be provided is the strength necessary for stopping and fixing the mixed gas ribbon 23 and the secondary air ribbon 24 from the strength to prevent the stopper. In addition, as described above, the mixed gas ribbon 23 and the secondary air ribbon 24 can be attached to the inner pipe 21 only by the ribbon fixing pin 25 before the inner pipe 21 is attached to the pipe 20.

  In this case, the ribbon outer peripheral surface of the ribbon retaining pin 25 is air-tightly joined to the inner peripheral surface of the ribbon retaining pin insertion hole 21c through which the ribbon retaining pin 25 of the inner pipe 21 is inserted, as described above. The stopper pin insertion hole 21c can be plugged and plugged.

  For this reason, the gap between the ribbon retaining pin 25 and the ribbon retaining pin insertion hole 21c can be eliminated, and the mixed gas is inserted into the secondary air supply portion 2d and the secondary air ejection portion 2b from the mixed gas ejection portion 2a. Inflow through the gap between the hole 21c and the ribbon retaining pin 25 can be prevented. Similarly, secondary air is prevented from flowing from the secondary air supply part 2d and the secondary air ejection part 2b to the mixed gas ejection part 2a through the gap between the ribbon retaining pin insertion hole 21c and the ribbon retaining pin 25. be able to. Therefore, the gas flow between the secondary air supply unit 2d and the secondary air ejection unit 2b and the mixed gas ejection unit 2a can be completely blocked, and the combustion performance of the burner 1 can be made higher. it can.

  In addition, since it is sufficient for the ribbon retaining pin 25 to have the strength to fix the mixed gas ribbon 23 and the secondary air ribbon 24 to the slit portion 21b, the strength in the axial direction can be reduced. The outer diameter can be reduced. As a result, the ratio of the ribbon stopper pin 25 to the mixed gas ejection part 2a and the secondary air ejection part 2b in the ejection direction V in FIG. 3 can be reduced. For this reason, while being able to perform ejection of both mixed gas and secondary air more smoothly, it can prevent that the ribbon stop pin 25 inhibits propagation of both the ejection direction V and the extension direction S of a flame. .

  Further, when the amount of gas mixture is reduced and the flame is weakly fired, if the amount of secondary air is also reduced, the convection action causes the flame to wrap around the upper side of the pipe 20. There is a risk of rolling up. When a phenomenon occurs in which the flame wraps around the upper side of the pipe 20 in this way, only the upper side of the pipe 20 is heated and the lower side is not heated, so there is a large temperature difference between the upper side and the lower side. As a result, thermal strain is generated in the pipe 20, heat fatigue is accumulated, and durability may be reduced.

  Thus, like the burner 1 shown in the first embodiment, the secondary air ejection part 2b is provided only on one side above the mixed gas ejection part 2a, so that the upper and lower sides of the mixed gas ejection part 2a are The amount of secondary air jetted from the secondary air jetting part 2b on the upper side was made larger than when both were provided.

  With such a configuration, even in the case of a low fire, since a large amount of secondary air can be ejected only from the upper side, the flame can be rolled up at a position away from the pipe 20, It is possible to prevent the flame from rolling up along the pipe 20. As a result, the temperature difference between the upper side and the lower side of the pipe 20 can be reduced, the occurrence of thermal distortion due to the temperature difference and the accumulation of thermal fatigue can be prevented, and the pipe 20 and thus the entire combustion section 2 can be prevented. Durability can be increased.

  Further, as shown in FIG. 1, the inner pipe bracket 22 is provided intermittently and partially in the extending direction S, and a gap between the inner pipe 21 and the inner peripheral surface of the pipe 20 is defined by the inner pipe bracket 22. Since the thickness is sufficiently larger than the thickness, a space located on the outer circumferential side of the inner pipe 21 in FIG. 2 on the side of the ejection direction V of the inner pipe bracket 22 and a space located on the side opposite to the ejection direction V of the inner pipe bracket 22. Can be regarded as the same space. In addition, since the gap between the inner pipe 21 and the inner peripheral surface of the pipe 20 is sufficiently large with respect to the thickness in the vertical direction of the secondary air ejection part 2b, the secondary air to the secondary air ejection part 2b The supply of air can be made smoother, and the ejection only upward can be made easier.

  In addition, a secondary air supply part and a mixed gas supply part are defined in piping, for example using the plate-shaped member containing a V-shaped part as shown in FIG.6 (b) of patent document 1 for an inner pipe. In some cases, in order to prevent both the secondary air from flowing into the mixed gas or the mixed gas from flowing into the secondary air due to the pressure difference between the secondary air and the mixed gas. The end of the V-shaped plate member opposite to the slit portion needs to be airtightly joined to the inner peripheral surface of the pipe.

  Here, in the technique shown in FIG. 6B of Patent Document 1, it is disclosed that the end of the inner pipe is fitted into the groove in the pipe. However, in this technique, sufficient airtightness is provided at the fitting position. Can not be secured. For this reason, it is conceivable that the end of the plate-like member including the V-shaped part is joined to the inner periphery of the pipe by welding or the like along the extending direction, but the inner periphery of the pipe is seamless in the extending direction. It is generally difficult to weld the surface and the end of the plate-like member. For example, the pipe is vertically divided into two parts, and the end of the plate-like member is welded to the divided surface of one of the two divided pipes. After joining, it becomes necessary to join the split surface of the other pipe to the end of the plate member by welding.

  In this case, an inherent difference occurs in the vertical gap between the inserted slit portion of the pipe and the secondary air ejection portion due to distortion caused by welding, and there is a possibility that stable gas mixture and secondary air ejection may be hindered. According to the burner 1 of the first embodiment, the side opposite to the slit portion 21b of the inner pipe 21 does not need to be airtightly joined to the inner peripheral surface of the pipe 20 over the entire extending direction S, as described above. It is also possible to make it unnecessary to divide the pipe in the vertical direction and weld so as to sandwich the plate member by the divided pipe.

  At the same time, since welding is not required when installing the inner pipe 21 in the pipe 20, the inserted slit portion 20a, the mixed gas jetting portion 2a, and the secondary air jetting portion 2b in the horizontal direction in FIG. Since it is possible to avoid the thickness in the direction, that is, the gap, from being affected by welding distortion, more stable mixed gas and secondary air can be ejected, and combustion performance can be further improved.

  In addition, even if the secondary air ejection part 2b is provided only on the upper side of the mixed gas ejection part 2a, that is, even if the secondary air ejection part is not provided on both sides of the mixed gas ejection part, the use state including normal strong fire In general, there is no effect on the combustion state. However, when there is a strong demand for supplying a small amount of secondary air on the lower side of the flame, for example, because of the thickness of the mixed gas ejection part 2a in the vertical direction, that is, when the gap of the slit part 21b is relatively large. Alternatively, the secondary air ejection portion 2b may be provided on the lower side as appropriate, and the air volume of the upper secondary air ejection portion 2b may be set larger than the air volume of the lower secondary air ejection portion 2b.

  In this case, the ribbon fixing pin 25 is protruded from both the left and right side surfaces in FIG. 2 of the pair of left and right slit portions 21b, that is, both the upper and lower surfaces. The secondary air ribbon may be fixed to the left end portion in FIG.

  Furthermore, in the burner 1 of the first embodiment, the function to be assigned to the conduit portion 3 can be limited to the function of introducing the mixed gas into the mixed gas supply portion 2c of the combustion portion 2, whereby the conduit portion 3 Can be configured only by ordinary piping.

  That is, in the conduit portion 3, it is possible to eliminate the necessity of providing the inner pipe 21 as in the combustion portion 2 to define the inside of the pipe constituting the conduit portion 3. Further, since it is not necessary to provide the insertion slit portion 20a provided in the range of L1 in FIG. 1A of the combustion portion 2 in the conduit portion 3, in the pipe constituting the conduit portion 3, the slit opening prevention pin 26 and There is no need to provide the slit opening pin insertion hole 20b. By these things, the structure of the conduit | pipe part 3 can be simplified and the manufacturing cost of gas baking apparatus S1 containing the burner 1 and the burner 1 can be reduced.

  In addition, since it is not necessary to provide the inner pipe 21 in the conduit portion 3, the number of parts of the conduit portion 3 is reduced, and the outer diameter of the piping constituting the conduit portion 3 is also excluded except for the large diameter portion in the vicinity of the plate 6. The diameter of the gas firing device S1 including the burner 1 and the burner 1 can be reduced as compared with the pipe 20 constituting the combustion unit 2, and the range in which the outer diameter of the burner 1 is reduced as long as possible. It can be reduced as much as possible.

  Furthermore, since the pipe constituting the conduit section 3 can use a lighter material that is cheaper and thinner than the pipe 20 constituting the combustion section 2, the raw material cost of the burner 1 can be suppressed. The raw material cost of the entire gas baking apparatus S1 including the burner 1 can be suppressed. In addition, the total weight of the burner 1 and thus the total weight of the gas firing device S1 can be reduced. In addition, if the member of the piping 20 which comprises the combustion part 2 is made into STPG, for example, the piping which comprises the conduit | pipe part 3 can be made into SGP.

  Moreover, since the secondary air introduction external piping part 4 can also be comprised only by normal piping, manufacturing cost can be reduced.

  In addition, since the upstream conduit portion 31 and the downstream conduit portion 32 constituting the conduit portion 3 can be detachably connected by the connection portion, that is, the socket 5, the burner 1 and the gas baking apparatus S1 are applied, for example, pan In a factory such as confectionery or the like, the upstream conduit portion 31 and the downstream conduit portion 32 can be separated at the socket 5 in the assembly process and repair process in which the burner 1 and the gas baking apparatus S1 are installed.

  By enabling the burner 1 to be in a separated state in this way, compared to the length of the burner 1 in the extending direction after assembly, the upstream side conduit portion 31 constituting the burner 1 before assembly, Each of the downstream side conduit portion 32 and the portion including the combustion portion 2 constituting the burner 1 can be shortened. This facilitates work including rotation, movement, and position adjustment in a narrow work space when installing the portion including the upstream side conduit portion 31 or the downstream side conduit portion 32 when installing the burner 1 in the factory. Assembling work and installation work can be made easier. That is, workability in a narrow place can be improved.

  In this assembling operation and installation operation, the secondary air introduction external piping section 4 is separated from the upstream piping joint by the downstream piping joint, and the upstream conduit section 31 is connected to the downstream by the socket 5. After the side conduit part 32 is connected, it can be connected to the secondary air injection part 8 and the secondary air connection part 2e by a pipe joint. Of course, either the upstream side or the downstream side of the secondary air introduction external piping part 4 is connected to the secondary air injection part 8 on the substrate 7 side or the secondary air connection part 2e on the combustion part 2 side via a pipe joint. It is good also as connecting in advance, after connecting the upstream conduit part 31 and the downstream conduit part 32 by the socket 5, and connecting the other by a pipe joint.

  In the first embodiment described above, the ribbon fixing pin 25 fixes both the mixed gas ribbon 23 and the secondary air ribbon 24 to the slit portion 21b. However, only the mixed gas ribbon 23 is fixed to the slit portion 21b. It can also be. The second embodiment will be described below. In addition, description about the component which is common in what was described in Example 1 is omitted, and only a different point is demonstrated.

  In the burner 1 of the second embodiment, the ribbon stopper pin 25 as the ribbon stopper means fixes only the mixed gas ribbon 23 to the slit portion 21c, and the secondary air ribbon 24 is located outside the slit portion 21c on the right side in FIG. Joined to the side by welding. Therefore, the ribbon stopping means 25 does not penetrate the secondary air ribbon 24.

  Further, in the burner 1 of the second embodiment, as shown in FIG. 6, a flange 11 configured on the outer peripheral side of the pipe 20 is used instead of the slit opening prevention pin 26 shown in FIG. Used. The flange 11 has a C-shaped configuration in which the inner peripheral side covers the outer peripheral surface of the pipe 20 as viewed from the extending direction S, and is fitted and arranged from the extending direction S at an appropriate position in the extending direction S of the pipe 20. Is done.

  According to the burner 1 of the second embodiment, the welding operation for airtightly joining the ribbon retaining pin 25 to the ribbon retaining pin insertion hole 21c of the slit portion 21b, and the secondary air ribbon 24 to the outer surface of the slit portion 21b are performed. The manufacturing process can be executed more efficiently by making the welding operation easier and the welding process easier.

  Further, in the burner 1 of the second embodiment, the slit opening prevention means 26 as shown in FIG. 2 extends into the pipe 20 by positioning the slit opening prevention means on the outer peripheral side of the pipe 20. It can be avoided.

  Further, since the slit opening prevention pin 26 is not used, after inserting the slit portion 21b into the inserted slit portion 20a of the pipe 20, the slit opening prevention pin insertion hole 21d is formed at a position adjacent to the quadrangular columnar portion 21a of the inner pipe 21. The need for drilling can be eliminated. For this reason, the inflow of the mixed gas from the mixed gas supply unit 2c to the secondary air supply unit 2d and the inflow of the secondary air from the secondary air supply unit 2d to the mixed gas supply unit 2c can be completely blocked. . Thereby, the combustion performance of the burner 1 can be made still higher.

  In the second embodiment described above, the ribbon retaining pin 25 has a cylindrical rod shape. However, since the ribbon retaining pin 25 has flexibility with respect to the ribbon retaining pin through hole 23a, the shape is appropriately changed to improve the combustion performance. It can be further increased. The third embodiment will be described below. In addition, description about the component which is common in what was described in Example 1 or Example 2 is omitted, and only a different point is demonstrated.

  As shown in FIG. 8, the ribbon retaining pin 25 in the third embodiment is in the direction in which the pipe 20 shown in FIG. 1 extends in the shape of the portion of the ribbon retaining pin 25 located in the mixed gas ribbon 23. The length TS in the extending direction S is a flat shape shorter than the length TV in the ejection direction V in which the mixed gas ejection part 2a ejects the mixed gas.

  As shown in FIG. 9, the ribbon fixing pin 25 has an elongated rectangular shape extending in the vertical direction, and is formed so as to have a small thickness in the extending direction S and a large thickness in the ejection direction V.

  In addition, in the burner 1 of the third embodiment, the inner peripheral surface shape of the ribbon stopper pin through hole 23a itself through which the ribbon stopper pin 25 of the mixed gas ribbon 23 passes is circular as shown in FIG. This circular shape is larger than the flat outer peripheral surface shape located on the inner peripheral side of the ribbon fixing pin through hole 23a of the ribbon fixing means 25.

  Furthermore, as shown in FIG. 8, the inner peripheral surface shape of the ribbon retaining pin through hole 23a has a larger margin in the extending direction S than the outer peripheral surface shape of the ribbon retaining pin 25, and the ejection direction V Has a small margin. Although not shown in FIG. 8, the ribbon retaining pin insertion hole 21c of the slit portion 21b has the same inner peripheral surface shape as the ribbon retaining pin through hole 23a.

  Here, in the burner 1 of the third embodiment, since the outer peripheral surface shape of the ribbon fixing pin 25 and the inner peripheral surface shape of the ribbon fixing pin insertion hole 21c do not match, as described in the first embodiment, the ribbon fixing pin Instead of joining the outer peripheral surface of 25 and the inner peripheral surface of the ribbon retaining pin insertion hole 21c by welding, welding is performed by the following method.

  That is, the arc chord-shaped top of the ribbon retaining pin 25 shown in FIG. 6 is inserted into the ribbon retaining pin insertion hole 21c in the axial direction end of the ribbon retaining pin 25 and the ribbon retaining pin 25 of the slit portion 21b. The ribbon retaining pin 25 and the ribbon retaining pin insertion hole 21c are joined in an airtight manner by joining both of the annular edge portions positioned on the outer peripheral side of the axial end portion by welding.

  In the burner 1 according to the third embodiment described above, the ribbon stopper pin 25 is mixed so that the projected area in the ejection direction V of the mixed gas ejection portion 2a of the ribbon stopper pin 25 is further minimized based on the above-described flat shape. It is possible to prevent the gas flow and the flame propagation from being obstructed. For this reason, the ejection of the mixed gas in the mixed gas ejection part 2a and the propagation of the flame can be made smoother, and the combustion efficiency and combustion performance of the burner 1 can be further enhanced.

  Further, as shown in FIG. 8, the inner peripheral surface shape of the ribbon stopper pin through hole 23a through which the ribbon stopper pin 25 of the mixed gas ribbon 23 is penetrated is a ribbon stopper located on the inner peripheral side of the ribbon stopper pin through hole 23a. The outer peripheral surface of the pin 25 is set to be larger than the outer peripheral surface, and in particular, a gap passage G having a circular outer periphery and a flat inner periphery is formed. Is set to be larger in the extending direction S than in the ejection direction V, the following effects can be obtained.

  That is, the gap area G formed between the inner circumferential surface of the ribbon retaining pin through hole 23a and the outer circumferential surface of the ribbon retaining pin 25 increases the substantial cross-sectional area of the mixed gas flow path in the mixed gas ejection portion 2a. And the combustion efficiency and combustion performance of the burner 1 can further be improved by making the flow of the mixed gas in the jet direction V in the mixed gas jet part 2a smoother.

  Further, as shown in FIGS. 8 and 9, since the ribbon fixing pin 25 has a flat shape with a long length in the ejection direction V, the mixed gas ribbon 23 is mainly placed in the ejection direction V of the slit portion 21b. Combustion performance can be enhanced while maintaining the strength required for fixing.

  In addition, in the burner 1 of the third embodiment, the configuration of the unit gas mixture ribbons 23-1 that constitute the mixed gas ribbon 23 is the same as that shown in FIG. 8 has a gap passage G as shown in FIG. 8 between the ribbon retaining pin 25 and the ribbon retaining pin through hole 23a, so that the space adjacent to the stacking direction with the unit mixed gas ribbon 23-1 interposed therebetween. Between them, the mixed gas can flow through the gap passage G. Also by this, the substantial cross-sectional area of the flow path of the mixed gas in the ejection direction V in the mixed gas ejection part 2a can be increased, and the flow of the mixed gas can be made smoother.

  In the above-described third embodiment, the shape of the ribbon fixing pin 25 is a flat shape over the entire vertical direction, but the portion positioned on the inner peripheral side of the ribbon fixing pin insertion hole 21c of the slit portion 21b It can also be set as the cylindrical shape based on the pin insertion hole 21c. The fourth embodiment will be described below. In addition, description about the component which is common in what was described in Example 3 is omitted, and only a different point is demonstrated.

  In the burner 1 according to the fourth embodiment, the shape of the portion of the ribbon retaining pin 25 located on the inner peripheral side of the ribbon retaining pin through hole 23a is the same as that shown in FIG. As shown in FIGS. 10 and 11, the end portion 25a located on the inner peripheral side of the ribbon fixing pin insertion hole 21c is formed into a cylindrical shape.

  In the burner 1 of the fourth embodiment, the outer peripheral surface shape of the end portion 25a located on the inner peripheral side of the ribbon fixing pin insertion hole 21c of the ribbon fixing pin 25 and the inner peripheral surface shape of the ribbon fixing pin insertion hole 21c are matched. Therefore, similarly to the method described in the first embodiment, the outer peripheral surface of the ribbon retaining pin 25 and the inner peripheral surface of the ribbon retaining pin insertion hole 21c are joined by welding, and the ribbon retaining pin 25 and the ribbon retaining pin insertion hole are joined. 21c can be airtightly joined.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described first to third embodiments, and various modifications can be made to the above-described first to third embodiments without departing from the scope of the present invention. Variations and substitutions can be added.

  For example, as shown in the first embodiment, even when the ribbon fixing pin 25 fixes both the mixed gas ribbon 23 and the secondary air ribbon 24 to the slit portion 21b, the ribbon fixing pin through hole 23a of the ribbon fixing pin 25 is used. And the part located in the inner peripheral side of ribbon stop pin through-hole 24a can also be made into a flat shape as shown in FIG. In this case, the ribbon fixing pin 25 has a protruding portion 25b that protrudes in a flat shape from the end portion 25a on the upper UP side in the form shown in FIG. 11 to the upper UP side.

  The present invention relates to a burner and a gas baking apparatus including a burner, and can provide a burner and a gas baking apparatus including a burner that can realize higher combustion performance. It is useful when applied to manufacturing processes and manufacturing plants.

DESCRIPTION OF SYMBOLS 1 Burner 2 Combustion part 2a Mixed gas ejection part 2b Secondary air ejection part 2c Mixed gas supply part 2d Secondary air supply part 2e Secondary air connection part 20 Piping 20a Inserted slit part 20b Slit opening pin insertion hole 21 Inner pipe 21a Square columnar part 21b Slit part 21c Ribbon retaining pin insertion hole (insertion hole)
21d Slit opening pin insertion hole 22 Inner pipe bracket 23 Mixed gas ribbon 23-1 Unit mixed gas ribbon 23a Ribbon retaining pin through hole (through hole)
24 Secondary Air Ribbon 24-1 Unit Secondary Air Ribbon 24a Ribbon Stop Pin Through Hole (Through Hole)
25 Ribbon stop pin (Ribbon stop means)
25a End part 25b Protruding part 26 Slit opening stop pin (slit opening stop means)
3 Conduit section (mixed gas introduction section)
31 Upstream side conduit part 32 Downstream side conduit part 4 Secondary air introduction external piping part (secondary air introduction part)
5 Socket (connection part)
6 Plate (joint part)
7 Substrate 8 Secondary air injection part 9 Gas mixer (mixer: mixed gas injection part)
10 igniter 11 flange (slit opening prevention means constructed outside pipe 20)
G gap passage S1 gas firing device

Claims (10)

  A slit part constituting a mixed gas jet part for jetting a mixed gas in which fuel and primary air are mixed, and a secondary air jet part for jetting secondary air into a gap between the slit part and the slit part inserted The insertion slit portion to be configured, a pipe including the insertion slit portion, a mixed gas ribbon for rectifying the mixed gas in the mixed gas ejection portion, and the secondary air in the secondary air ejection portion are rectified And a ribbon stopper for fixing one or both of the mixed gas ribbon and the secondary air ribbon only to the slit portion.   2. The burner according to claim 1, wherein the ribbon stopper and the insertion hole through which the ribbon stopper of the slit portion is inserted are airtightly joined.   The burner according to claim 2, wherein the ribbon stopper unit fixes the mixed gas ribbon to the slit portion, and the secondary air ribbon is joined to an outer surface of the slit portion.   4. The burner according to claim 2, further comprising slit opening preventing means for preventing the insertion slit portion from being opened, wherein the ribbon stopping means and the slit opening stopping means are constituted by separate members. .   The burner according to claim 4, wherein the slit opening preventing means is configured on an outer peripheral side of the pipe.   The shape of the portion of the ribbon stopper that is located in the mixed gas ribbon or the secondary air ribbon has a length in the extending direction of the pipe, and a direction in which the mixed gas ejection portion ejects the mixed gas or The burner according to claim 5, wherein the secondary air ejection portion has a flat shape shorter than a length in a direction in which the secondary air is ejected.   The inner peripheral surface shape of the through hole through which the ribbon stopper means of the mixed gas ribbon or the secondary air ribbon passes is larger than the outer peripheral surface shape located on the inner peripheral side of the through hole of the ribbon stopper means. The burner according to claim 6.   8. The burner according to claim 7, wherein an outer peripheral surface shape located on an inner peripheral side of the insertion hole of the ribbon stopper is made to coincide with an inner peripheral surface shape of the insertion hole of the slit portion.   A mixed gas supply unit for supplying the mixed gas to the mixed gas ejection unit; and a secondary air supply unit for supplying the secondary air to the secondary air ejection unit, wherein the mixed gas is supplied to the mixed gas supply unit. The burner according to any one of claims 1 to 8, further comprising a mixed gas introduction part to be introduced and a secondary air introduction part for introducing the secondary air into the secondary air supply part.   A burner according to claim 9, wherein a mixed gas injection part for injecting the mixed gas into the mixed gas introduction part, a secondary air injection part for injecting the secondary air into the secondary air introduction part, A gas firing apparatus comprising a placement portion for placing a fired product.

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