JP2807185B2 - Vertical double-chain gas firing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas sintering apparatus, and more particularly to a sintering method in which an object to be sintered is placed on a tray which is rotated and driven in a sintering chamber provided with a gas burner. The present invention relates to a gas firing device suitable for firing.

[0002]

2. Description of the Related Art As a typical so-called rotary firing apparatus, an object to be fired is mounted on a tray which is rotatably driven in a firing chamber provided with a gas burner and fired. Merry-go-round type) is known. FIG. 9 shows a schematic configuration of the ferris wheel type firing device.
A rotating body 3 having a plurality of beams 2 in the radial direction is provided in the baking chamber 1, and a tray 4 on which an object to be fired is installed is attached to each beam tip of the rotating body 3. A gas burner 5 for heating the inside of the sintering chamber 2 is provided below the sintering chamber 2, and the sintering chamber 2 is provided with an air introduction hole 6 and an exhaust gas discharge hole 7 required for combustion.

[0003] In the case of baking bread, for example, using the baking apparatus 1, a molded product made of bread dough is placed on each tray, and a gas burner 5 is burned to heat and bake. Each tray 4 rotates in the combustion chamber 2 with the rotation of the rotating body 3, and the dough of the tray is baked in the process of rotating in the baking chamber.

[0004]

In the rotary type baking apparatus described above, the tray is configured to rotate in a circular orbit. Therefore, as the apparatus becomes larger, the orbit of the tray orbit becomes larger. As a result, the installation area of the firing chamber increases accordingly.
In addition, when the firing facility becomes large, the number of gas burner tubes increases, but the amount of air supplied to each gas burner tube becomes uneven. Therefore, in order to secure the required minimum amount of secondary air for all burners, extra outside air is introduced as a whole, and the temperature in the firing chamber is reduced by that much, and further discharged from the discharge holes. There has been a problem that the amount of exhaust gas is increased and the thermal efficiency is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a tray moving mechanism that is vertically elongated so as to extend in the height direction. It is an object of the present invention to provide a gas baking apparatus provided with a tray moving mechanism that can stably move.
Another object of the present invention is to provide a gas firing chamber having good thermal efficiency by eliminating the need for introducing extra outside air even if the apparatus becomes large.

[0006]

According to a first aspect of the present invention, there is provided a gas firing apparatus having a tray moving mechanism which rotates while supporting a tray on which an object to be fired is installed in a firing chamber provided with a gas burner. In the baking apparatus, the tray moving mechanism has a pair of left and right tray transport chains that support both ends of the tray and move on a vertically long rotation path extending in the height direction, and the gas burner supplies fuel gas. A burner pipe having a gas outlet and an air supply pipe arranged along the burner pipe and supplying secondary air to the gas outlet are provided.

[0007]

According to the first aspect of the present invention, the tray moving mechanism provided in the firing chamber of the gas firing apparatus has a vertical direction (height direction).
When the apparatus is large, it can be accommodated by extending the size in the height direction, and can be installed without increasing the installation area. In addition, the necessary amount of air required for combustion can be supplied to the fuel gas injection port of the gas burner pipe by the minimum amount,
The amount of outside air introduced into the firing chamber can be minimized, and the thermal efficiency can be improved. In addition, it becomes possible to easily control the temperature distribution in the height direction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a gas firing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 (a) shows a firing chamber 11 of a gas firing apparatus 10, which has a product loading / unloading port 12 on the front and a control panel 13 for controlling the operation of the firing apparatus on the side. ing.

FIG. 1B shows a side view of the gas firing chamber and an arrangement of a tray moving mechanism 15 provided inside the firing chamber. A tray 16 is a tray made of a chain driven in a vertically long rotation path. It is moved so as to rotate inside the firing chamber 11 by the transport mechanism. Incidentally, reference numeral 14 denotes a gas burner for heating the firing chamber, which is disposed at the lower and upper portions of the firing chamber. Further, an exhaust hole (not shown) for discharging exhaust gas is provided in an upper portion of the firing chamber 11.

FIG. 2 shows a schematic configuration of the tray moving mechanism 15. The tray moving mechanism 15 supports a first transport chain 17, a second transport chain 18 and a first sprocket 20 for driving the sub-chain 19 provided along the conveyor chain 17 ₁ to 20 _4, 21 ₁ to 21 _4, 22 ₁ to 22 ₄
It consists of. The drive trajectories of the respective chains are all the same, and are defined by the respective sprockets so as to form a vertically long rotation trajectory so as to extend upward as shown in the figure.

The tray 16 has support portions 16 at both left and right ends thereof.
a and 16b, the first and second transport chains 17 and 18 are pivotally mounted by pins 23 and 24 fixed to the support portions 16a and 16b. An arm 25 is attached to the pin 23 fixed to one of the support portions 16a as described later, and the arm 25 is mounted on the sub-chain 1 with the arm 25 being horizontal.
9 is pivoted.

By driving the sub-chain 19 holding the arm 25 in synchronization with the transport chain 17, the tray 16 is always kept horizontal, and the swing of the tray 16 is prevented. Although only one tray 16 is shown in FIG. 2, this is for convenience of explanation, and a plurality of trays are actually supported by each transport chain.

FIGS. 3 and 4 show details of the structure for attaching the tray 16 to the transport chain 17 and the sub-chain 19. FIG. Here, FIG. 3 shows one support portion 16 a of the tray 16.
FIG. 4 is a perspective view of the tray from the outside, and FIG.
FIG. 6A is a perspective view of the tray 6a as viewed from the tray side. A pin 23 is fixed to one support portion 16 a of the tray 16, and the pin 23 is pivotally attached to the transport chain 17 so as to penetrate the first transport chain 17. An arm 25 is fixed to one end of the pin 23, and this arm 25 is pivotally attached to the sub-chain 19 by a pin 26 at the other end as shown in FIG. The arm 25 is fixed to the pin 23 in a state parallel to the surface of the mounting portion 16 c of the tray 16, and is attached to the sub-chain 19 in a state where the arm 25 is horizontal. With this mounting structure, since the arm 25 is integrated with the tray 16, the surface of the mounting portion 16c of the tray 16 and the arm 25 are always kept in a parallel relationship.

Therefore, as shown in FIG.
When the first transport chain 17 and the sub-chain 19 are driven synchronously at the same speed in a state where
Is always horizontal, and the tray 16 is transported by the transport chain. Therefore, the loading portion 16c of the tray 16 is transported on the rotating track by the transport chains 17 and 18 in a stable state while always being horizontal and also being prevented from swinging.

The first transport chain 17, the second transport chain 18, and the sub-chain 19 constituting the tray transport mechanism 15 in this embodiment are all driven synchronously at the same speed. FIG. 6 shows the drive system of these chains. The rotation output from the drive motor 26 is transmitted through the sprocket S, the chain C, the gear R, and the transmission shaft N to the sprocket 20 ₄ for the first transport chain 17, the sprocket 21 ₄ for the second transport chain 18, and the sub-chain 19 is transmitted as indicated by arrow (a) to use the sprocket 22 _4, each chain is rotatably driven in synchronism at the same speed.

As described above, the tray transfer mechanism 15 of the gas baking apparatus according to the present embodiment causes the vertically-long vertically extending orbit to be transferred to the driven transfer chain while always keeping the tray horizontal. And a sub-chain constituting a swing-preventing mechanism is provided, so that the tray can be rotated in the firing chamber in a stable state. Further, when the scale of the baking apparatus is increased, the rotation trajectory of the tray transport mechanism may be extended upward,
In particular, the scale can be increased without increasing the installation area. Further, even if the scale is increased and the rotation path of the tray transport mechanism is lengthened in the vertical direction, as described above, the means for preventing the tray from oscillating is provided, so that the traveling of the tray becomes unstable. Nothing. In particular, when the height of the firing chamber is increased by increasing the scale, even if the transport chains 17, 18 and the sub-chain 19 are elongated due to the firing temperature, the tray transport mechanism does not swing the tray as described above. Since the means is provided, the tray does not become unstable and can be driven in a stable state.

Next, the gas burner 17 provided in the firing chamber 11 employed in the present embodiment will be described. FIGS. 7 and 8 show details of the burner 14. The burner 14 is constituted by a burner tube main body 30 in which a gas ejection slit 31 is formed on a side portion. The gas ejection slit 31 is provided with a flame hole ribbon 32 formed of a plurality of corrugated thin plates for shaping a flame caused by gas combustion, and is fixed by a pin 33. The burner tube main body 30 is
The flat plate portion 34 ₁ and the bent portion 3 attached to the support plate 40
4 is supported by the ₂ made from the support member 34.

The support member 34 also has a secondary air supply pipe 35 having a rectangular cross section extending along the burner pipe main body 30.
Is supported. On one side of the secondary air supply pipe 35 distribution holes 36 at intervals along the longitudinal direction is formed, distribution holes 36 by the bent portion 34 ₂ and the secondary air supply pipe 35 of the support member 34 It is open to the defined secondary air distribution passage 37.

[0019] The gap passage 38 formed between the secondary top wall ₃₅₁ of the air supply pipe 35 and the bent portion 34 ₂ of the support member 34, the outlet of the gap passage 38, gas jet of the burner tube body 30 It is positioned so as to face the slit 31.
An ignition electrode 41 for igniting gas is attached to the gas inlet side of the burner tube main body 30, and a flame detection electrode 42 for detecting whether or not gas is ignited is attached to the tip end side. I have.

In the combustion using the gas burner tube 14 having the above-described structure, a mixed gas of fuel gas and primary air carrying the gas is supplied to a burner tube main body 30 from a gas supply source (not shown), and a secondary air supply not shown This is performed by supplying the secondary air required for gas combustion from the source to the secondary air supply pipe 35. As shown in FIG. 8, the air supplied to the secondary air supply pipe 35 enters the secondary air distribution passage 37 through distribution holes 36 formed at intervals along the longitudinal direction.
It is sent out through a ribbon 39 attached to the gap passage 38. Once the air in the secondary air supply pipe 35 is introduced into the secondary air distribution passage 36 and exits through the rectifying ribbon 39, the air delivered from the outlet of the gap passage 38 is uniform in the longitudinal direction. Air volume can be delivered.

The outlet of the gap passage 38, which is the outlet of the secondary air, is located at a position facing the gas ejection slit 31 of the burner tube main body 30, so that the gas ejection slit 31 of the burner tube main body 30 has a uniform outlet. The next air is supplied. The mixed gas of the gas discharged from the gas ejection slit 31 of the burner tube main body 30 and the primary air can be burned by the supply of the secondary air from the secondary air supply pipe 35, and can be burned.
The spark is ignited and the combustion is started and continued.

Using the gas firing apparatus according to the present embodiment,
In the case of baking bread, in FIG. 1, a molded product made of bread dough is placed on a tray from the loading / unloading port 12 of the baking chamber 11 and introduced into the baking chamber. The baking of the bread is performed in the process of burning the gas burner 14 in the baking chamber 11 and driving the tray transport mechanism to rotate the tray 16 along the vertical orbit.

After the firing, the door of the carry-in / out port 12 is opened to take out the product. In the gas sintering apparatus 10 according to the present embodiment including the gas burner 14 having the above structure, the amount of secondary air supplied to the gas burner can be suppressed to the minimum necessary, and a decrease in thermal efficiency due to the introduction of extra outside air can be prevented. And stable combustion can be obtained.

Further, even if the gas burners are vertically dispersed in the vertically elevated firing chamber, the respective gas burners can be uniformly burned, and the temperature in the combustion chamber can be easily controlled. it can. In particular, when the scale is increased by increasing the height, ascending air currents are generated due to the combustion of the gas burners, but combustion is unstable due to the ascending air currents because secondary air supply pipes are installed in each gas burner Can be suppressed. Although the tray on which the product is placed may be shaken, as described above, the gas baking apparatus according to the present embodiment includes a mechanism for preventing the tray from swinging,
The above-mentioned problems associated with the expansion of the scale are also solved.

[0025]

According to the first aspect of the present invention, since the tray moving mechanism provided in the firing chamber of the gas firing apparatus is configured to rotate on the rotation track extending in the vertical direction (height direction),
If the device is made large, it can be accommodated by extending the size in the height direction, and it becomes possible to install the device without increasing the installation area. In addition, it is possible to supply only the necessary minimum amount of air required for combustion to the fuel gas injection port of the gas burner pipe, and to minimize the amount of outside air introduced into the firing chamber, thereby improving thermal efficiency. Can also be
A stable combustion state of the flame can be obtained. In addition, it becomes possible to easily control the temperature distribution in the height direction.

[Brief description of the drawings]

FIG. 1 is a diagram showing the appearance of a gas firing device.

FIG. 2 is a diagram illustrating a schematic configuration of a tray transport mechanism.

FIG. 3 is a view showing a mechanism for preventing the tray from swinging;

FIG. 4 is a view showing a mechanism for preventing the tray from swinging.

FIG. 5 is a diagram showing a tray transport system.

FIG. 6 is a diagram illustrating a drive system of a tray transport mechanism.

FIG. 7 is a diagram showing a configuration of a gas burner.

FIG. 8 is a view showing a cross-sectional structure of a gas burner.

FIG. 9 is a view showing a conventional rotary firing apparatus.

[Explanation of symbols]

 1, 10 Gas firing device 2, 11 Firing chamber 14 Gas burner 15 Tray transport mechanism 16 Tray 17 First transport chain 18 Second transport chain 19 Subchain 20, 21, 22 Sprocket 25 Arm 30 Burner pipe main body 35 Secondary air supply pipe C chain R gear S sprocket N transmission shaft

Claims (1)

(57) [Claims] 1. A gas firing apparatus having a tray moving mechanism that rotates while supporting a tray on which an object to be fired is installed in a firing chamber provided with a gas burner, wherein the tray moving mechanism supports both ends of the tray. A pair of left and right tray transport chains that move on a vertically long rotation path extending in the height direction, wherein the gas burner is disposed along a burner pipe having a gas ejection port for supplying a fuel gas, and along the burner pipe. A gas baking apparatus, comprising: an air supply pipe provided to supply secondary air to the gas ejection port.