JPH1114013A - Gas burner - Google Patents

Abstract

(57) [Summary] A gas burner capable of simplifying the configuration of a control mechanism capable of variably controlling the inflow ratio of a mixed gas into a mixing chamber from the outside, being formed at low cost, and improving the reliability thereof is provided. provide. The gas burner is provided with an air inlet and a nozzle at one end of a mixing tube, and connected to a substantially central portion in the longitudinal direction of a mixing chamber having an elongated flame port plate at the other end of the mixing tube. A control plate that can be tilted by operating an operation member provided on the mixing pipe at a connection portion between the mixing pipe and the mixing chamber, and that can control the inflow ratio of the mixed gas into both longitudinal sides of the mixing chamber. Provide. The control plate is tilted by, for example, a reciprocating operation of an operation rod or a rotation operation of a rotary operation element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long gas burner used for industrially baking foods and the like, and more particularly to a gas burner capable of individually controlling the amount of heat generated at both longitudinal ends. .

[0002]

2. Description of the Related Art Conventionally, when foods and the like are industrially baked and dried, a long infrared radiation burner (referred to as a gas burner) that burns with a gas has been used. New Model Registration Bulletin No. 25
No. 35347.

[0003] As shown in FIG.
The mixing chamber 10 (distribution chamber) is provided at the center in the longitudinal direction of the mixing chamber 103.
3 is provided and a mixing box 103 is provided.
A first slide plate 105 for controlling the amount of mixed gas flowing into the distribution box 104 from the outside, and controlling the flow direction of the mixed gas supplied from outside to the mixing chamber 103 via the mixing pipe 102; Second slide plate 1 for changing the ratio of the mixed gas flowing to both sides in the longitudinal direction in mixing chamber 103
06.

[0004] One end of an operation rod 107 provided in the mixing chamber 103 is connected to one end of the first slide plate 105 in the longitudinal direction. Operation unit 1 pulled out
07a is operated to move the operation rod 107 forward and backward. As a result, the opening area changes due to the overlap between the ventilation hole provided on the upper surface of the distribution box 104 and the ventilation hole provided on the first slide plate 105, and the distribution box 104 extends from the opening.
The amount of mixed gas flowing into the tank is variably controlled.

[0005]

However, in the gas burner 101, the distribution box 104, the first slide plate 105, and the second slide plate 106 are used to variably control the amount of the mixed gas flowing into the mixing chamber 103. This necessitates an increase in the number of parts and the necessity of forming a large number of ventilation holes in the distribution box 104 and the first slide plate 105, which complicates the part shape and easily increases the part cost. As a result, there is a problem in that the control mechanism of the flow rate of the mixed gas into the mixing chamber 103 becomes complicated and tends to be expensive.

Further, the above-mentioned control mechanism comprises a distribution box 10.
4, the first slide plate 105, the second slide plate 106, and the like.
Is provided at a position relatively close to the flame opening plate 108, the sliding portion of each member is easily heated to a high temperature depending on the temperature at the time of combustion of the gas burner. In addition, there has been a problem that the reliability of the control mechanism is inferior, for example, the slide operation stops.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a control mechanism capable of variably controlling the amount of mixed gas flowing into a mixing chamber from outside. To provide a gas burner that can be formed at a low cost by simplifying the gas burner and improve the reliability thereof.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, an air inlet and a nozzle are provided at one end of a mixing pipe, and the other end of the mixing pipe is provided. In a gas burner in which a substantially central portion in the longitudinal direction of a mixing chamber having a long flame port face plate is connected to the mixing chamber, a tilting portion is operated by operating an operating member provided on the mixing pipe at a connection portion between the mixing pipe and the mixing chamber. And a control plate capable of controlling the ratio of the mixed gas flowing into both sides in the longitudinal direction of the mixing chamber.

According to this structure, the control plate is tilted by operating the operating member provided on the mixing tube, and the division ratio of the space of the connecting portion between the mixing tube and the mixing chamber is changed. The inflow ratio of the mixed gas into both ends in the longitudinal direction of the mixing chamber is controlled. Therefore, the inflow ratio can be controlled by the tilting operation of one substantially plate-shaped control plate, the configuration of the control mechanism is simplified, and the operation member is provided in the mixing pipe farther from the flame port plate, so that the operation member can be controlled. It is less affected by the temperature during combustion and the like, and stable control can be performed for a long period of time.

According to a second aspect of the present invention, the operation member is formed of an operation rod, one end of the operation rod is connected to the control plate, and the other end is taken out of the mixing tube. The control plate is tilted. The invention according to claim 3 is characterized in that the operation member is formed by a rotary operator, and the control plate is tilted by the operation of the rotary operator.

With this configuration, when the operating rod is reciprocated or the rotary operation member is rotated, the control plate connected thereto is tilted, and the space between the mixing pipe and the mixing chamber is reduced. The division ratio of the section changes, and the inflow ratio of the mixed gas into both ends in the longitudinal direction of the mixing chamber is controlled to a predetermined amount.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 4 show a first embodiment of a gas burner according to the present invention. FIG. 1 is a sectional view thereof, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a perspective view in which a part of a main part of the control mechanism is cut away.

In FIGS. 1 and 2, the gas burner 1 is
The mixing tube 2 has a substantially cylindrical mixing tube 2 having a diameter gradually increasing from a substantially upstream side 2a toward a downstream side 2b, and a mixing chamber 3 connected to an opening 4 on the downstream side 2b of the mixing tube 2. . Mixing tube 2
A large-diameter air damper portion 5 is formed on the upstream side 2a, and a pair of air suction ports 6 whose opening degree can be adjusted by an air damper 5a (see FIG. 4) is provided on a side wall of the air damper portion 5; A nozzle 7 is provided at the center of the air damper unit 5. The mixing pipe 2 mixes the air sucked from the air suction port 6 and the gas supplied from the nozzle 7 inside the mixing pipe 2 to generate a mixed gas.
Supply within.

The opening 4 on the downstream side 2b of the mixing tube 2
Is opened upward, which is a direction orthogonal to the axial direction of the mixing tube 2, and a central portion in the longitudinal direction of the mixing chamber 3 is connected to the opening 4. The mixing chamber 3 is formed in an elongated gutter shape by the mixing chamber case 8 and has an opening 8a formed on the upper surface, and a connection hole 8b connected to the opening 4 of the mixing pipe 2 is formed in the center of the bottom surface. ing. The mixing chamber case 8 of the mixing chamber 3 and the mixing pipe 2 are formed into a predetermined shape by drawing a steel plate, and the joint between the opening 4 and the connection hole 8b is fixed by screws, welding, or the like. Thereby, the mixing pipe 2 and the mixing chamber 3 are integrated.

A flame plate 9 made of ceramics or the like and formed with a large number of flame ports 9a is disposed in an opening 8a on the upper surface of the mixing chamber 3, and above the connecting hole 8b of the mixing chamber 3. Is provided with a pressure equalizing plate 10. This equalizing plate 10
Are three equalizing plate stays 11 whose both ends and the central part are fixed to the side wall along the longitudinal direction of the mixing chamber case 8.
The control plate 15 which is fixed to a to 11b with a screw 12 and the control mechanism 14 is jointly fastened to the central pressure equalizing plate stay 11b.

The control mechanism 14 has a control plate 15 and an operation rod 16 as an operation member connected to the control plate 15. As shown in FIG. 3, the control plate 15 includes a fixing portion 17 having a fixing hole 17 a fixed to the equalizing plate stay 11 b, a vertical portion 18 provided continuously with the fixing portion 17, A bent portion is formed by an inclined portion 19 provided continuously at a lower end of the vertical portion 18.

The control plate 15 has a thickness of, for example, 0.3 mm.
The stainless steel plate is formed by the following press working, and is tilted by a predetermined angle in the direction of arrow A or arrow B in FIG. The control plate 15 is formed in a rectangular shape in a side view as shown in FIG.
It is disposed with a slight gap from the inner surface of the side wall of the downstream side 2 b of the mixing pipe 2, and the connecting portion between the vertical portion 18 and the inclined portion 19 of the control plate 15 has a reinforcing projection 20 (FIG. 3)
Is provided.

A hinge plate 21 is fixed to the distal end side of the inclined portion 19 of the control plate 15 by spot welding, and the operating rod 16 is connected to the hinge plate 21. The operation rod 16 is formed of, for example, a stainless steel rod or pipe, and one end 16a is bent into an L-shape to form the hinge portion 21 of the hinge plate 21.
It is rotatably engaged with the hole a.

Further, as shown in FIG.
Is also bent into an L-shape to form an operating portion 16b. The operating portion 16b penetrates through the mixing pipe 2 and is taken out from one air suction port 6 on the side wall of the air damper portion 5. ing. The air suction port 6 serving as an outlet for taking out the operation section 16b is not provided with any seal structure. The air suction port 6 cannot be completely closed due to the penetration of the operation rod 16, but since the gas burner 1 burns, air must be suctioned and the air suction port 6 must be opened at least. Even if it cannot be completely sealed, no inconvenience occurs.

On the side wall of the air damper portion 5 of the mixing pipe 2 serving as an outlet of the operating rod 16 to the outside, there are provided a plurality of locking grooves 23a which are continuously provided in the axial direction of the mixing pipe 2. The plate 23 is fixed. The operating rod 16 is held at a predetermined position by locking the operating portion 16b of the operating rod 16 in the locking groove 23a of the locking plate 23.

The locking groove 23a of the locking plate 23 is provided with an indicator (not shown) such as a scale.
The operating rod 16 is disposed in contact with a part of the inner surface of the upper wall of the mixing tube 2, and lifts the operating portion 16 b upward by utilizing its elasticity or the like to engage the locking groove 23 a of the locking plate 23. After being released from the locked state, the reciprocating operation of pulling or pushing the operating portion 16b allows the operation portion 16b to move in the direction of arrow C or the direction of arrow D in FIG.

Next, the operation of the gas burner 1 will be described. The gas burner 1 is used, for example, for baking food or the like, and a plurality of gas burners 1 are arranged in a row on a gas stand (not shown). When baking food or the like, first, a gas cock (not shown) is opened to supply gas into the mixing pipe 2 through the nozzle 7, and an appropriate amount of the air suction port 6 is opened to allow air to flow into the mixing pipe 2. Inhale.

The gas and air supplied into the mixing pipe 2 are mixed in the mixing pipe 2 to form a mixed gas, which is divided and supplied into the mixing chamber 3 from the opening 4 of the mixing pipe 2, and a large number of the flame port plates 9 are provided. From the flame outlet 9a. This gas mixture is ignited by an ignition mechanism (not shown) and burns, and the flame plate 9 glows red and infrared rays are radiated from its surface. As a result, the gas burner 1 is brought into a combustion state, and foods and the like placed on the grill above the gas burner 1 are burned.

When the gas burner 1 is burning,
The mixed gas supplied from the mixing pipe 2 into the mixing chamber 3 is controlled by the control mechanism 14 as follows. That is, the control plate 15 whose base end side is fixed to the equalizing plate stay 11b provided above the connection hole 8b of the mixing chamber 3 has the inclined portion 19 on the distal end side that extends downwardly in the downstream side 2b of the mixing pipe 2. The mixed gas flowing through the mixing pipe 2 at this position is
As shown by arrows E and F in FIG. 1, the mixture is split and flows on both sides of the control plate 15, and is supplied to both ends 3 a and 3 b in the longitudinal direction of the mixing chamber 3.

The amount of the mixed gas diverted by the control plate 15 is set by adjusting the position (angle) of the control plate 15 by the reciprocating operation of the operating rod 16 and, for example, the right portion of the gas burner 1 (the end of the mixing chamber 3). When the amount of combustion in the portion 3b) is small, the operation rod 16 is moved in the direction of arrow C to tilt the control plate 15 in the direction of arrow a, and the flow rate of the mixed gas flowing on the right side of the control plate 15 as indicated by the arrow is reduced. Do more. Also,
When the amount of combustion on the left side of the gas burner 1 (the end 3a side of the mixing chamber 3) is small, the control rod 15 is tilted in the direction of arrow B by moving the operating rod 16 in the direction of arrow D.
The flow rate of the mixed gas flowing on the left side of 5 as indicated by arrow E is increased.

By tilting the tilting plate 15 in the direction of arrow a or in the direction of arrow b, the flow rate of the mixed gas flowing on both sides of the control plate 15 is adjusted, and both ends 3 of the mixing chamber 3 in the longitudinal direction are adjusted.
The inflow amount of the mixed gas into the gas burners a and 3b is made uniform, and the combustion amount in the longitudinal direction of the gas burner 1 is set substantially uniform.
As described above, the tilting operation of the control plate 15 is performed by the operation unit 1 of the operation rod 16 taken out of the mixing tube 2.
6b is moved upward and reciprocated by moving a predetermined amount in the direction of arrow c or d.

As described above, in the gas burner 1 of the above embodiment, the control plate 15 provided at the connection portion between the mixing pipe 2 and the mixing chamber 3 is tilted by the operation of the operating rod 16 to move the mixing pipe. The control mechanism 14 can be constituted by one control plate 15 and one operation rod 16 because the ratio of inflow of the mixed gas in 2 to both ends 3a and 3b in the longitudinal direction of the mixing chamber 3 can be adjusted. Thus, the configuration of the control mechanism 14 can be simplified. As a result, the number of parts of the control mechanism 14 can be reduced as compared with the conventional case, and the shape of each part can be simplified to reduce the manufacturing cost. become.

The operating rod 16 of the control mechanism 14 is inserted into the mixing pipe 2 and the operating portion 16b is taken out of the air suction port 6 of the air damper section 5 of the mixing pipe 2. It is not necessary to take any measures against leakage of the gas mixture from the outside to the outside, so that a sealing structure for the operation rod 16 with respect to the mixing tube 2 is not required, and an insertion hole for taking out the operation rod 16 is provided on the side wall of the air damper unit 5. There is no need to pierce, and the configuration of the mixing tube 2 itself can be simplified.

Further, since the mixing pipe 2 and the mixing chamber 3 are formed by drawing a steel plate, the weight of the gas burner 1 itself can be reduced as compared with a gas burner formed by a conventional casting. In addition, assembling to a gas table, maintenance work, transportation and installation work, and the like can be easily performed. From these facts, it is possible to obtain an inexpensive gas burner 1 with a simple configuration.

Since the operation rod 16 for tilting the control plate 15 is inserted into the mixing tube 2, the operation rod 1
6 is located farther from the flame outlet plate 9 and is hardly affected by the flame (combustion temperature) at the time of combustion of the gas burner 1, so that the operating rod 16 is reliably prevented from being thermally deformed and the like. Can be stably performed over a long period of time, and a highly reliable gas burner 1 can be obtained.

FIGS. 5 and 6 show modifications of the gas burner 1 of the first embodiment. FIG. 5 is a sectional view of FIG.
Is a perspective view of the control mechanism. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The same applies to the following embodiments. The gas burner 31 in this modified example is provided with a control plate 15 of the control mechanism 14.
Is formed in a substantially flat plate shape without bending the front end side.

That is, the control plate 15 is formed by a fixing portion 17 having a fixing hole 17a formed therein and a vertical portion 18 provided continuously with the fixing portion 17. The hinge plate 21 is fixed by welding. The fixing portion 17 is fixed to the equalizing plate stay 11b by the screw 12, and the end 16a of the operating rod 16 inserted into the mixing tube 2 is engaged with the hinge plate 21.

Also in this gas burner 31, the control plate 15 is moved by the reciprocating operation of the operating rod 16 to move back and forth.
Can be tilted by a predetermined angle in the direction of arrow A or arrow B. In addition to obtaining the same operation and effect as the gas burner 1 of the first embodiment, the shape of the control plate 15 itself is further simplified, and The operation and effect that the mechanism 14 can be formed at lower cost can be obtained.

FIG. 7 shows a second embodiment of the gas burner according to the present invention.
The gas burner 41 of the second embodiment is characterized in that the control plate 15 of the control mechanism 14 is fixed inside the wall surface of the downstream side 2b of the mixing pipe 2 and the pressure equalizing plate 10 The partition plate 42 is provided continuously on the lower surface of the substantially central portion in the longitudinal direction. That is, the control plate 15 is bent in a substantially U-shape, the base end of which is fixed to the inner surface of the side wall below the opening 4 of the mixing tube 2 by the screw 43, and the tip end of which is inclined upward (in the direction of the opening 4). Extending.

The winding portion 4 is provided at the tip end of the control plate 15.
4, a locking pin 45 is fitted and locked to the winding portion 44, and the end 16 a of the operating rod 16 inserted into the mixing pipe 2 is connected to the locking pin 45. .
Further, the partition plate 42 is formed in a flat plate shape, and its lower end slightly projects into the opening 4 of the mixing tube 2, and a predetermined gap is set between the partition plate 42 and the tip end of the control plate 15. Note that reference numeral 4 in FIG.
Reference numeral 6 denotes a packing interposed between the connecting portion of the mixing pipe 2 and the mixing chamber 3.

According to the gas burner 41 of the second embodiment, the control plate 15 moves the screw 43 by moving the operating rod 16 forward and backward as indicated by arrows C and D by the reciprocating operation of the operating portion 16b of the operating rod 16. As shown in the two-dot chain line and the three-dot chain line as a fulcrum, it is tilted by a predetermined angle in the directions of arrows A and B, and its position changes, and the positional relationship between the distal end of the control plate 15 and the lower end of the partition plate 42 also changes. Change.

By changing (tilting) the position of the distal end of the control plate 15, the flow rate (inflow ratio) of the mixed gas flowing from the mixing tube 2 to both sides of the partition plate 42 as indicated by arrows E and F is adjusted. The same functions and effects as those of the gas burner 1 of the first embodiment can be obtained. In the second embodiment, since the control plate 15 is provided in the mixing tube 2, the control plate 15 and the operating rod 16 are
Can be assembled in the mixing tube 2 in advance, and the effect of improving the assemblability of the gas burner 41 can be obtained.

FIGS. 8 and 9 show a third embodiment of the gas burner according to the present invention. FIG.
FIG. 9 is an enlarged view of a portion B in FIG. The gas burner 51 according to the third embodiment is characterized in that the control plate 15 of the control mechanism 14 is configured to be pressed and tilted by the tip 52a of the operation screw 52 (operation member).

That is, the control plate 15 is fixed to the horizontal portion on the side wall of the downstream side 2b of the mixing tube 2 by the screw 43, and the operation screw 52 is provided on the lower surface of the substantially bent portion in the same manner as in the second embodiment. Are in contact with each other. As shown in FIG. 9, the operation screw 52 can be advanced and retreated in a female screw hole 55 provided in a horizontal portion of the side wall of the mixing tube 2 in a direction substantially orthogonal to the axial direction of the mixing tube 2. , And can be held in a predetermined position by a lock nut 54 while being sealed by a seal washer 53.

According to this gas burner 51, when the lock nut 54 is loosened and the operation screw 52 is rotated in the direction of the arrow G (screw-in direction), the tip 52a advances into the mixing pipe 2 and the control plate 15 is moved. By pushing, the control plate 15 is tilted to a predetermined position in the direction of arrow A. When the operation screw 52 is rotated in the direction opposite to the direction indicated by the arrow G, the distal end portion 52a is retracted in the mixing tube 2, and the control plate 15 is tilted to a predetermined position in the direction indicated by the arrow B by its elastic force.

By tilting the tilting plate 15 by rotating the operation screw 52, the flow rate of the mixed gas flowing into both sides of the partition plate 42 can be adjusted, and the same operation and effect as the gas burner 41 of the second embodiment. Is obtained. In the third embodiment, the operation screw 52 and the lock nut 5
Since the gas mixture in the mixing pipe 2 may leak to the outside from the gap formed in the threaded portion of the screw 4, in actual use, after the operation screw 52 is set at a predetermined position, the operation screw 52 is locked with the operation screw 52. The threaded portion of the nut 54 is sealed by applying, for example, an adhesive or resin to prevent leakage of the mixed gas to the outside.

FIG. 10 is a sectional view of a main part showing a modification of the third embodiment. The gas burner 51 of this modification is
The operation screw 52 is provided on the side wall of the vertical portion on the downstream side 2b of the mixing tube 2 so as to be able to advance and retreat in the horizontal direction (axial direction of the mixing tube 2). Even with such a configuration, by rotating the operation screw 52, the distal end portion 52a is advanced and retreated, and the control plate 1 is moved.
5 can be tilted in the direction of arrow A or arrow B, and the same operation and effect as in the third embodiment can be obtained.

It should be noted that the present invention is not limited to each of the above embodiments, and that the embodiments can be appropriately combined. In each of the above embodiments, the configuration of the control mechanism 14 and the control plate 15 The shape and tilting mechanism thereof are also examples, and without departing from the gist of each invention,
It goes without saying that various changes can be made.

[0044]

As described in detail above, claims 1 to 3
According to the described invention, a control mechanism for controlling the inflow ratio of the mixed gas flowing from the mixing tube to both ends in the longitudinal direction of the mixing chamber, a control plate provided at a connection portion between the mixing tube and the mixing chamber, It can be composed of an operating member that tilts the control plate, so that the configuration of the control mechanism can be simplified and inexpensively formed, and the control mechanism is less affected by the flame during combustion of the gas burner. It can be operated stably for a long period of time, and its reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a gas burner according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a perspective view of the control mechanism.

FIG. 4 is a perspective view in which a part of a main part of the control mechanism is cut away.

FIG. 5 is a sectional view showing a modification of the first embodiment.

FIG. 6 is a perspective view of the control mechanism.

FIG. 7 is a sectional view of a main part showing a second embodiment of the gas burner according to the present invention.

FIG. 8 is a sectional view of a main part showing a third embodiment of the gas burner according to the present invention.

9 is an enlarged view of a portion B in FIG. 8;

FIG. 10 is a sectional view of a main part showing a modification of the third embodiment.

FIG. 11 is a sectional view showing a conventional gas burner.

[Explanation of symbols]

 1 gas burner 2 mixing pipe 2a upstream 2b downstream 3 mixing chamber 5 Air damper part 6 Air intake port 7 Nozzle 8 Mixing chamber case 9 Flame plate 10 ... Equalizing plate 14 ... Control mechanism 15 ... Control plate 16 ... Operation rod 16a ... End 16b ... Operation Part 21: Locking plate 31: Gas burner 41: Gas burner 42: Partition plate 45: Locking pin 51: ... Gas burner 52 ... Operation screw 54 ... Lock nut

Claims (3)

[Claims] An air inlet and a nozzle are provided at one end of a mixing tube, and a substantially central portion in a longitudinal direction of a mixing chamber having an elongated flame port plate is connected to the other end of the mixing tube. A control plate that is tilted by operating an operation member provided in the mixing pipe at a connection portion between the mixing pipe and the mixing chamber, and that can control the inflow rate of the mixed gas into both longitudinal sides of the mixing chamber. Gas burner characterized by having provided. 2. The operating member is formed of an operating rod, one end of the operating rod is connected to the control plate and the other end is taken out of the mixing tube, and the control plate is tilted by operating the operating rod. 2. The method according to claim 1, wherein
The described gas burner. 3. The gas burner according to claim 1, wherein said operating member is formed by a rotary operator, and said control plate is tilted by operating said rotary operator.