JP3548809B2 - Rotary heat treatment furnace - Google Patents

Description

[0001]
[Industrial applications]
TECHNICAL FIELD The present invention relates to a rotary heat treatment furnace that performs firing while rolling a material to be fired or an object housing body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a pot rotary heat treatment furnace as a rotary heat treatment furnace for sintering a material to be fired by rotating and heating a cylindrical storage body (hereinafter, referred to as a pot) P storing the material to be fired. As shown in FIG. 3, the pot rotary heat treatment furnace 50 has a plurality of roller shafts 53 horizontally arranged in a baking chamber 52 in a furnace body 51 so as to penetrate the baking body 51, and is provided on a ceiling portion of the baking chamber 52. The bar-shaped heater 54 is horizontally arranged so as to penetrate the furnace body 51. The roller shaft 53 is configured to be rotationally driven by a rotational drive unit (not shown) provided outside the furnace body.
[0003]
The pot rotary heat treatment furnace 50 opens a door (not shown) for removing an object to be fired provided on the front surface of the furnace body 51, carries the pot P into the firing chamber 52, and further, moves the adjacent roller shaft. The pot P is supported by 53,53. Then, in this state, the door is closed, and while the pot A is rolled by the rotation of the roller shafts 53 and 53, the inside of the firing chamber 52 is heated by the rod-shaped heater 54 so that the material to be fired in the pot P is uniformly. It is designed to be fired.
[0004]
[Problems to be solved by the invention]
The conventional pot rotary heat treatment furnace configured as described above has the following problems. That is, the roller shaft 53 and the rod-shaped heater 54 are disposed so as to penetrate the furnace body 51. For this reason, the work of attaching and detaching the roller shaft 53 and the rod-shaped heater 54 to and from the furnace body 51 for maintenance and replacement is performed by inserting and removing the roller shaft 53 and the rod-shaped heater 54 from the furnace body 51 along the horizontal direction. I was However, for that purpose, a work space is required around the pot rotary heat treatment furnace 50, and there has been a problem that the installation space is correspondingly increased.
[0005]
Further, since a space for carrying the pot P into and out of the firing chamber 52 must be provided in the firing chamber 52, the size of the firing chamber 52 and thus the furnace body 51 is increased accordingly. However, in this case, the installation space is further increased, and the increase in the size of the firing chamber 52 and the furnace body 51 leads to an increase in the heat capacity of the heat treatment furnace 50, and the power consumption of the rod-shaped heater 54 is accordingly reduced. In addition, it causes a problem that it takes a long time to heat and cool the firing chamber.
[0006]
Further, the door is miniaturized in consideration of the thermal efficiency, so that there is a problem that the workability of loading and unloading the pot is poor.
[0007]
Therefore, it is an object of the present invention to achieve the above-described objects such as downsizing, reduction of installation space, reduction of power consumption, improvement in workability of carrying-in / out work of a firing target, and maintenance work.
[0008]
[Means for Solving the Problems]
To achieve the above object, the present invention is divided into upper and lower furnace body parts, internal furnace configured to be disengaging one of the furnace body parts relative to the other of the furnace body parts In the firing chamber provided in, a plurality of cylindrical bodies are arranged in a substantially horizontal state through the furnace body, and by rotating these cylindrical bodies around their axes, a circular shape mounted over the adjacent cylindrical bodies is provided. The rotary heat treatment furnace for heating the object to be fired or the circular container for the object to be fired while rolling it has the following features.
[0009]
In other words, in this rotary heat treatment furnace, the heating body for heating the inside of the furnace is supported only by the upper furnace body part, and the cylindrical body on which the object to be fired or the housing for the object to be fired is mounted is the lower furnace body part. It is provided in.
[0010]
[Action]
According to the above configuration, if the furnace body parts are separated by the separation mechanism, a work space for carrying in / out the object to be fired or the object to be fired, or a maintenance space for maintaining the inside of the firing chamber is formed between the furnace body parts. Will be.
[0012]
Furthermore, the following effects can be obtained by forming a loading / unloading concave portion communicating with the firing chamber on the butted end surface of the furnace body parts and detachably providing a lid for closing the concave portion. That is, when the furnace body parts are separated by the separating mechanism, if the lid is removed to open the concave portion, the working space in that part becomes large.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway front view of a rotary pot heat treatment furnace according to one embodiment of the present invention, and FIG. 2 is a perspective view showing a state at the time of separation.
[0014]
The pot rotary heat treatment furnace 1 includes a furnace body 2. The furnace body 2 is composed of a pair of upper and lower furnace body parts 2A and 2B. The furnace body parts A and 2B are integrated to constitute a furnace body 2 having a firing chamber 3 therein. In the firing chamber 3, a pair of roller shafts 4 and 4 are horizontally disposed so as to penetrate the furnace body 2. The roller shafts 4 and 4 are disposed so as to be sandwiched between the furnace body parts 2A and 2B, with their shaft core heights being equal to the butting height positions of the furnace body parts 2A and 2B. Both ends of the roller shafts 4 and 4 project from the furnace body 2, and both ends are supported by bearings 5 and 5 fixed to the side surface of the lower furnace body part 2 </ b> B. A rotating mechanism 9 including a sprocket 6, a chain 7, and a driving motor 8 is connected to one end 4a of the roller shaft 4, and the roller shafts 4 and 4 are driven to rotate in the same direction by the rotating mechanism 9. It is supposed to be. The roller shaft 4 is made of a metal such as Inconel or silicon carbide (SiC).
[0015]
The baking chamber 3 is provided with a U-shaped heater 10 along its inner side wall. Both ends of the heater 10 are supported by the ceiling 2a of the upper furnace body part 2A, and are suspended in the firing chamber 3. The heater 10 is configured by bending silicon carbide (SiC) into a U-shape.
[0016]
A flange 11 is attached to the furnace body parts 2A, 2B. The flanges 11 are provided on both sides of the furnace bodies 2A, 2B with the roller shaft 4 interposed therebetween, and are mounted flush with the butted end surfaces 2b, 2c of the furnace body parts 2A, 2B. A screw screw 12 is arranged to penetrate the upper and lower flanges 11, 11 arranged in abutting relation. A connection nut 13 is fixed to the upper surface of the flange 11 of the upper furnace body 2 </ b> A, and the connection nut 13 is screwed with the screw 12. The lower end of the screw 12 is connected to a turning motor 14, which turns the screw 12. The rotation of the screw 12 raises and lowers the connection nut 13 and thus the upper furnace part 2A. In the present embodiment, a separating mechanism 15 is composed of the screw 12, the connecting screw 13, and the rotating motor 14. The separating mechanism 15 may be configured to raise and lower the furnace body part 2A using an air sill, a hydraulic sill, or the like.
[0017]
On the side of the furnace body 2 located on the other end 4 b side of the roller shaft 4, an opening 16 is formed that extends over both furnace body parts 2 </ b> A and 2 </ b> B. The opening 16 is configured by combining recesses 17A and 17B formed in the butted end surfaces 2b and 2c of the furnace body parts 2A and 2B. The opening 16 is sealed by a lid 18 made of the same material as the furnace body 2. Since the opening 16 is provided at the position where the roller shaft 4 is provided, the cover 18 has a concave portion 19 through which the roller shafts 4 and 4 are inserted.
[0018]
Next, a firing step of the object to be fired by the pot rotary heat treatment furnace 1 will be described.
[0019]
First, an object to be fired such as a ceramic chip is stored in a cylindrical pot P. The diameter of the pot P is larger than the distance between the roller shafts 4 and 4. Then, while the firing chamber 3 is kept at the normal temperature, the separating mechanism 15 is driven to raise the furnace body part 2A to separate the furnace body parts 2A and 2B, and to work space between the furnace body parts 2A and 2B. Form S. Then, by removing the lid 18 in a state where the furnace body parts 2A and 2B are separated, the work space S is enlarged by the opening 16 minutes, and then the pot P is carried into the firing chamber 3 and the roller shaft 4, Place between 4 The placed pot P is supported by the roller shafts 4 and 4.
[0020]
When the loading of the pot P is completed, the separating mechanism 15 is driven in reverse, the furnace body part 2A is lowered, butted against the furnace body part 2B, and the two are integrated, and the opening 16 is closed with the lid 18. Then, the heater 10 is energized to heat the inside of the firing chamber 3 and the object to be fired in the pot P is fired. At this time, the pot P is rolled on the roller shafts 4 and 4 by rotating the roller shafts 4 and 4 by the rotating mechanism 9, and thereby the objects to be fired are moved in the pot P and the respective objects to be fired are evenly distributed. Baking.
[0021]
When the firing is completed and the temperature of the firing chamber 3 falls to the cooling temperature range, the furnace body part 2A is raised again to allow outside air to flow into the firing chamber 3 for rapid cooling. Also at this time, by rotating the rotating mechanism 9 and rolling the pot P, uniform deformation of the material to be fired is performed while preventing deformation of the roller shafts 4 and 4. After the firing chamber 3 is sufficiently cooled to near normal temperature, the pot P is carried out of the firing chamber 3 after the work space S is enlarged by 16 minutes by removing the lid 18.
[0022]
The object to be fired is fired as described above. As described above, in this pot rotary heat treatment furnace 1, the furnace space part 2A is raised to create a work space S between the furnace body parts 2A and 2B. Due to the formation, the pot loading / unloading operation can be performed relatively easily. Therefore, it is not necessary to provide a space for carrying in / out work, particularly, inside the firing chamber 3 formed by integrating the furnace body parts 2A and 2B. Therefore, the volume of the firing chamber 3 and thus the size of the furnace body 2 can be reduced accordingly.
[0023]
Further, a cover 18 that closes the opening 16 is provided, and when the pot P is carried in / out, the cover 17 is removed to open the opening 16. Therefore, the carrying-in / out operation is further facilitated, and the firing chamber 3 and the furnace body 2 can be further reduced in size.
[0024]
On the other hand, maintenance work of the roller shafts 4, 4 and the heater 10 is performed as follows. That is, the separation mechanism 15 is driven to raise the furnace body part 2A, and the lid 18 is removed to form a work space S between the furnace body parts 2A and 2B. Then, operations such as repair and replacement of the roller shafts 4 and 4 and the heater 10 are performed. This work can be easily performed because the work space S is formed between the furnace body parts 2A and 2B. Further, even when the roller shafts 4 and 4 are replaced, the work space S is a work space for attaching and detaching the roller shafts, so that a work space around the furnace body 2 is hardly needed. Further, even when the heater 10 is to be replaced, since both ends of the heater 10 are supported by the ceiling portion 2a of the furnace body part 2A, the heater 10 is pulled out to the work space S side or is removed from the work space S. The work can be performed by inserting it toward the ceiling 2a (see FIG. 2). Therefore, almost no space around the furnace body 2 for replacing the heater 10 is required.
[0025]
As described above, since the pot rotary heat treatment furnace 1 has a structure in which a work space for maintenance is hardly required around the furnace body 2, the installation space can be reduced accordingly.
[0026]
In the above embodiment, both ends of the heater 10 are supported by the ceiling 2a of the furnace body part 2A. However, the heater 10 is supported by the furnace floor 2d of the furnace body part 2B and the heater 10 is supported by the firing chamber. Even if it is set up inside 3, it can maintain the simplicity of attachment and detachment. Further, even if a panel-type heater is used as the heater 10 and this panel heater is attached to the furnace body part 2A ceiling 2a or the like, the simplicity of attachment and detachment can be maintained.
[0027]
Further, in the above embodiment, the present invention was implemented in a pot rotary heat treatment furnace in which the object to be fired was stored in the pot P, and the circular object to be fired was directly rolled by the roller shafts 4 and 4. It goes without saying that the present invention can be implemented in a rotary heat treatment furnace configured as described above.
[0028]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
[0029]
That is, by separating the furnace body parts by the separation mechanism, a work space for carrying in and out the object to be fired and the object to be fired, and for maintaining the inside of the firing chamber is formed between the furnace body parts. Become. Therefore, it is not necessary to provide such a work space around the furnace body, and the installation space of the rotary heat treatment furnace can be reduced accordingly.
[0030]
Since the work to be fired can be loaded and unloaded from the work space, there is no need to provide a space for loading and unloading work especially in the firing chamber formed by integrating the furnace body parts. And the size of the furnace body can be reduced. As a result, the size of the heat treatment furnace can be reduced and the power consumption can be reduced, and the firing chamber can be cooled in a short time by separating the furnace body parts.
[0032]
The following effects can be obtained by forming a carry-in / carry-out recess leading to the firing chamber at the butt end face of one of the furnace body parts and detachably providing a lid for closing the recess. That is, when the furnace body parts are separated by the separating mechanism, if the lid is removed to open the recess, the work space in that part is enlarged, and the work for carrying in and out the object to be fired can be further facilitated.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing the structure of a pot rotary heat treatment furnace according to one embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which the pot rotary heat treatment furnace of the embodiment is separated.
FIG. 3 is a sectional view of a conventional pot rotary heat treatment furnace.
[Explanation of symbols]
2 Furnace body 2A, 2B Furnace body part 3 Firing chamber 4 Roller shaft 9 Rotary mechanism 10 Heater 15 Separation mechanism 16 Opening 17A. 17B recess 18 lid

Claims (2)

Is divided into upper and lower furnace body parts, the firing chamber provided inside of the furnace body that is configured to be disengaging one of the furnace body parts relative to the other of the furnace body parts, through the furnace body more Are arranged in a substantially horizontal state, and by rotating these cylinders around their axis, a circular object to be fired or a circular object to be fired mounted over an adjacent cylinder is rolled. A rotary heat treatment furnace for heating while heating
The heating element for heating the inside of the furnace is supported only by the upper furnace body parts, and the cylindrical body on which the object to be fired or the housing for the object to be fired is mounted is provided on the lower furnace body parts. And a rotary heat treatment furnace. 2. The rotary heat treatment furnace according to claim 1 , wherein a concave portion for carrying in and out which communicates with the baking chamber is formed in a butt end surface of the furnace body parts, and a lid for closing the concave portion is detachably provided .

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