JP2577922B2 - Shuttle furnace - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley in which rails extending through the entrance and exit from the furnace body are laid in a furnace body having burners arranged on both side walls and objects to be fired are placed thereon. On the rails and carried into the furnace,
The present invention relates to a shuttle furnace which is carried out of a furnace after firing.

2. Related Art Problems to be Solved by the Conventional Technology and the Invention In the conventional shuttle furnace, the bogie on which the objects to be fired are mounted is heated by the combustion flame ejected from the burners arranged on both side walls while being stopped in the furnace. The object to be fired on the carriage was then fired, so that the temperature increased between the object to be fired placed at the position corresponding to the burner and the object to be fired located between adjacent burners. Occasionally, a temperature difference occurred, and the quality of the fired product became non-uniform.

Means for Solving the Problems The present invention, as means for solving such problems, has a furnace body with a depth greater than the length of the bogie, and seal blocks protruding from the lower front and rear ends of the bogie. With
A recess is formed in the back end of the furnace body and the door that closes the doorway, in which the seal block is fitted almost tightly, and a driving device is provided for repeatedly moving the bogie in the furnace body by a fixed distance during firing.

Effects and Effects of the Invention The present invention has the above-described structure, and the depth of the furnace body is made larger than the length of the bogie, and the bogie is repeatedly reciprocated a fixed distance in the furnace body by a driving device during firing. Sometimes, even if there is a difference in the furnace temperature between the position corresponding to the burner and the position corresponding between adjacent burners,
Each part of the object to be fired placed on the cart is alternately moved to a high-temperature zone and a low-temperature zone, is uniformly heated, is fired at a uniform quality, and a seal block is protrudingly provided at a lower portion of both front and rear ends of the cart. In addition, since the recess closing the seal block almost tightly is formed in the door that closes the back end and the entrance of the furnace body, when the bogie moves to the far end side or the door side of the furnace body, the upper side of the bogie is located on the opposite side. The space that communicates with the lower side is prevented,
This has the effect of preventing the wheels and bearings from being burned out by the heat of the burner.

An embodiment in which the present invention is applied to a falling flame type shuttle furnace will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a furnace body in which several burners 2 are provided at a certain interval in the horizontal direction below the furnace walls on both left and right sides of the inside, and a rail 4 is laid on a floor surface 3 thereof. , Door 5
Extends outside the furnace body 1 through the entrance opened and closed by
By traveling on the rails 4, the carriage 6 on which the object to be fired a is placed is carried into or out of the furnace body 1 and slightly from the furnace wall. A guide wall 7 is formed at a distant position to guide the combustion flame ejected from the burner 2 to rise inside the furnace body 1 along the furnace wall by colliding with the combustion flame.

On the upper surface of the carriage 6, a plurality of support plates 11 are arranged side by side at intervals in the left-right direction, and between the adjacent support plates 11, 11, a number of shelf plates 13 having notches 12 communicating vertically are provided. The object to be fired a is placed on it, and a projecting portion 40 is formed downward at a position between the wheels 30, 30 on the lower surface of the carriage 6, and The upper surface of the carriage 6 and the protrusion 40
A rectangular communication hole 10 communicating the lower surface of the furnace body 1 is formed, and a protrusion 41 is formed upward at a position between the rails 4 on the floor surface 3 of the furnace body 1. In addition, it is the same width as the communication hole 10 of the bogie 6 and is longer before and after the communication hole 10,
When the carriage 6 is carried into the furnace body 1, an inlet 20 is formed in which the communication holes 10 are aligned, and a chimney 22 provided outside the furnace body 1 by a flue 21 formed below the floor of the furnace body 1. Is communicated to. A seal 25 made of a heat-resistant material that is elongated in the left-right direction is fixed to the front and rear sides of the inlet 20 of the floor 3, respectively. At the inside position of the rails 4 and 4, the inlet of the floor 3 is bent at the left and right side edges of the shielding plate 26 downwardly over the entire length thereof. Sleeve plates 28 are formed to be inserted into the sand in grooves 29 provided on the left and right sides of 20.

Seal blocks 32, 32 made of a heat-resistant material are attached to the front and rear ends of the bogie 6 so as to protrude forward and backward long, and the inner wall of the door 5 and the inner wall of the door 5 have a furnace wall. And a part of the door 5 is bent so as to protrude to the outside of the furnace body 1 to have a depth substantially equal to the protruding length of the seal block 32, and
Are formed with very small gaps, and the length between both ends of the seal blocks 32, 32 is
The length between the two concave portions 33, 33 when the door 5 is closed is shorter than the length between the two concave portions 33, 33, and is fitted into the concave portions 35, 35 formed on both the furnace walls on the left and right side surfaces of the bogie 6 and the two seal blocks 32, 32. The protrusions 34, 34 forming a narrow bent gap are formed over the entire length, and the sand in the groove 38 provided on the left and right sides of the carriage 6 at positions outside the rails 4 on the floor 3 is provided. Sleeve plates 37, 37 to be inserted into the inside are attached.

A driving device 16 is provided near the entrance of the floor 3 in the furnace body 1 so that a chain 15 bridged between the pair of sprockets 1 reciprocates a predetermined distance by driving a motor (not shown). On the other hand, a connecting portion 17 that is removably connected to the chain 15 is fixed to an end of the carriage 6 on the door 5 side.

In the present embodiment, with the above-described configuration, the trolley 6 in which the objects to be fired a are stacked on the upper surface of the shelf plate 13 is carried into the furnace body 1 and
When the chain 15 of the driving device 16 is connected to the connecting portion 17 of the vehicle, the door 5 is closed, and the driving device 16 is driven.
As the chain 15 reciprocates, adjacent burners move between the position moved toward the door 5 as shown in FIG. 1 and the position moved toward the far end of the furnace body 1 as shown in FIG. Two, two
When the combustion flame is ejected from each burner 2 in this state, the combustion flame rises along the furnace wall by the guide wall 7 and reaches the ceiling. After the object to be fired a is heated while descending between the objects to be fired a, the notch 12 of the shelf 13 of the carriage 6 and the support plate 1 are heated.
It is discharged from the chimney 22 through the communication hole 10 and the flue 12 from between 1 and 11, and while the temperature in the furnace body 1 rises, the position corresponding to the position between the adjacent burners 2 and 2 is increased. A low-temperature zone and a high-temperature zone at a position corresponding to the front of the burner 2 are alternately formed in the direction in which the burners 2 are arranged in parallel. Are alternately exposed to the high-temperature zone and the low-temperature zone irrespective of the mounting position, whereby all the objects to be fired a are evenly heated.

When the carriage 6 in the furnace body 1 moves in the front-rear direction, the fitting projections 34 are fitted into the recesses 35 of the furnace wall and the sleeve plate 37 is In the front and rear part, one seal block 32 has a corresponding recess
Even when the seal block 32 is inserted deeply, the other seal block 32 has its tip inserted into the corresponding concave portion 33, so that a combustion flame is generated in the space above the carriage 6 where the object to be fired a is fired. This prevents the air from blowing into the space surrounding the wheels 30 and the rails 4 on the lower side of the trolley 6, and the sleeve plate 28 of the shielding plate 26 attached to the protrusion 40 of the trolley 6 And the shielding plate 26 always covers the front and rear portions of the portion corresponding to the communication hole 10 of the introduction port 20 while constantly abutting on the upper surface of the seal 25 of the projection 41 of the floor surface 3, The combustion flame is prevented from blowing into the space surrounding the wheel 30 and the rail 4 from between the communication hole 10 and the inlet 20, so that the wheel 30 and the rail 4 are heated to a high temperature by the combustion flame. No exposure.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings show an embodiment of the present invention. FIGS. 1 and 2 are a longitudinal sectional view showing a moving state of a truck, FIG. 3 is a transverse sectional view, and FIG. It is a perspective view. 1: Furnace, 2: Burner, 4: Rail, 6: Dolly, 16: Drive,
a: Object to be fired

Claims (1)

(57) [Claims] 1. A rail extending out of the furnace through an inlet / outlet is laid in a furnace having burners arranged on both side walls, and a bogie on which objects to be fired are mounted is run on the rail to enter the furnace. In the shuttle furnace, which is carried in and carried out of the furnace body after firing, the depth of the furnace body is made larger than the length of the bogie, and seal blocks are protrudingly provided at lower portions at both front and rear ends of the bogie. And a door for closing the doorway closing the doorway, a recess is formed in which the seal block is fitted almost tightly, and a driving device is provided for repeatedly moving the carriage back and forth by a predetermined distance in the furnace during firing. Shuttle furnace