JP2007187424A - Batch type kiln - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a batch type kiln capable of preventing damage to a hearth in which baking objects can be easily put in and taken out of the kiln. <P>SOLUTION: This batch type kiln is equipped with a base plate 42, a hearth 60, supports 62, 64, a pair of guide rails 66, 68, and an placing plate. The hearth 60 is arranged on the base plate 42, and is composed of a fiber heat insulating material having a plurality of hole parts 60a, 62a formed therein penetrating in the vertical direction. The base ends of the supports 62, 64 are fixed to the base plate 42 and are each inserted into the hole parts 60a, 62a of the hearth 60. The guide rails 66, 68 extend in the transporting direction of a baking sheath 100 and are each connected to tip ends of the supports 62, 64. The baking sheath packed with the baking objects is placed on the placing plate and is supported by a supporting face S of the guide rails 66, 68. The baking sheath moves over the guide rails 66, 68. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a batch-type firing furnace.

2. Description of the Related Art Conventionally, an elevating batch-type firing furnace in which a hearth part moves up and down is known (for example, see Patent Document 1).
JP-A-6-159952

  However, the batch-type firing furnace described in Patent Document 1 has a hearth portion made of a fiber-based heat insulating material having a relatively low strength. And in this batch type baking furnace, the support | pillar for hold | maintaining the hearth plate in which a to-be-fired material is mounted was provided on the fiber type heat insulating material which is a comparatively brittle material. For this reason, there has been a problem that the hearth of the batch-type firing furnace constituted by the fiber-based heat insulating material is easily damaged by the load of the object to be fired.

  Moreover, in the up-and-down type batch type firing furnace described in Patent Document 1, the hearth part is moved up and down in order to put the object to be fired into and out of the firing furnace, so the raising and lowering mechanism of the hearth part is complicated. There has been a problem that it is complicated and it is complicated to put in and out the product to be fired into the firing furnace.

  An object of the present invention is to provide a batch-type firing furnace capable of preventing damage to the hearth and easily taking in and out the fired material into and from the firing furnace.

  The batch-type firing furnace according to the present invention is a batch-type firing furnace for firing an object to be fired, and includes a base member and a plurality of holes that are disposed above the base member and penetrate in the vertical direction. A hearth composed of a fiber-based heat insulating material having a portion formed thereon, a plurality of struts each having a base end connected to the base member and inserted through holes in the hearth, and in the conveying direction of the object to be fired A pair of rail members that extend and are respectively connected to the tips of the plurality of support columns, and a mounting plate that is supported by the pair of rail members and on which the object to be fired is mounted. It moves on the rail member.

  In the batch-type firing furnace according to the present invention, the pair of rail members for supporting the placing plate on which the object to be fired is placed is not on the hearth constituted by the fiber-based heat insulating material, but via a plurality of columns. Provided on the base member. Therefore, the hearth is prevented from being damaged by the load of the mounting plate or the object to be fired. Moreover, in the batch type baking furnace which concerns on this invention, a mounting board is supported by a pair of rail member, and a pair of rail member is extended in the conveyance direction of to-be-fired material. Therefore, the mounting plate on which the object to be fired is moved moves along the pair of rail members, so that the object to be fired can be easily put in and out of the firing furnace. Furthermore, the base ends of the plurality of columns are connected to the base member, and the tips of the columns are connected to the rail members. Therefore, when the mounting plate moves on the pair of rail members, the struts are restrained from being bent by the frictional force generated between the mounting plate and each rail member, and the hearth is prevented from being damaged. Become so.

  Further, a plurality of holes that penetrates in the vertical direction and are different from the plurality of holes are formed in the hearth, and the base ends are connected to the base member and are inserted into the other holes of the hearth, respectively. A plurality of struts different from the plurality of struts, and an auxiliary member connected to the tips of the other plurality of struts and supporting the mounting plate together with the pair of rail members. It is preferable to arrange | position between. If it does in this way, since a mounting board will be supported also by an auxiliary member in addition to a pair of rail members, it will become possible to prevent modification of a mounting board.

  In addition, a plurality of rotating members that span the pair of rail members and support the mounting plate together with the pair of rail members are further provided, and a plurality of each rotating member is provided at a position corresponding to each other in the pair of rail members. It is preferable to be held by the holding portion. If it does in this way, since a mounting board will be supported also by a rotation member in addition to a pair of rail member, it will become possible to prevent a deformation | transformation of a mounting board. Further, the rotation of the rotating member makes the movement of the mounting plate smoother.

  ADVANTAGE OF THE INVENTION According to this invention, the failure | damage of a hearth can be prevented and the batch type baking furnace which can perform the taking-in / out of the to-be-baked object in the baking furnace simply can be provided.

  Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

  With reference to FIGS. 1-5, the structure of the batch type baking furnace 10 which concerns on this embodiment is demonstrated. FIG. 1 is a perspective view showing an overview of the entire batch firing furnace according to the present embodiment. 2A is a side sectional view of the batch-type firing furnace according to the present embodiment, and FIG. 2B is a top sectional view of the batch-type firing furnace according to the present embodiment. 3A is a side sectional view of the firing chamber according to the present embodiment, and FIG. 3B is a top sectional view of the firing chamber according to the present embodiment. FIG. 4 is a perspective view showing a part of the hearth according to the present embodiment. FIG. 5 is an exploded perspective view showing a part of the hearth according to the present embodiment.

  The batch-type firing furnace 10 is for firing an object to be fired, such as a ceramic molded body that has been packed in a firing sheath 100, and is a horizontal transfer (horizontal feed) atmosphere furnace. The batch-type firing furnace 10 includes transport units 20a and 20b, replacement chambers 30a and 30b, and a firing chamber 40.

The transport unit 20a is for carrying out the sheath 100, which is filled with unfired objects to be fired, to the replacement chamber 30a, and the transport unit 20b is fired after firing that comes out of the replacement chamber 30b. This is for carrying out the sheath 100 to the subsequent process. For this purpose, each of the transport units 20a and 20b has a plurality of rollers 22. In the transport units 20 a and 20 b, the firing sheath 100 mounted on the mounting plate 110 is transported by the plurality of rollers 22. The mounting plate 110 is preferably made of a material having heat resistance (fire resistance) such as mullite (70% of the composition is alumina and 30% is SiO ₂ ).

  The replacement chambers 30a and 30b are rooms in which the firing sheath 100 is transferred from the transport unit 20a to the firing chamber 40 and the firing sheath 100 is relayed from the firing chamber 40 to the transport unit 20b. The replacement chambers 30a and 30b are respectively provided with a first shutter 32 that moves up and down by a cylinder 32a and a second shutter 34 that moves up and down by a cylinder 34a. In the batch-type firing furnace 10 according to this embodiment, one of the first shutter 32 and the second shutter 34 is opened so that the inside of the firing chamber 40 is not exposed to the atmosphere, and the replacement chambers 30a, 30b, and When the transfer units 20a and 20b or the replacement chambers 30a and 30b and the firing chamber 40 are connected, the other shutter is closed.

  The replacement chambers 30a and 30b are respectively provided with cylinders 36 on the side surfaces. Each cylinder 36 linearly moves a rod 36b having a pusher 36a connected to the tip thereof in the horizontal direction with respect to the second shutter 34, and the firing sheath 100 in the replacement chamber 30a is placed in the firing chamber 40 together with the mounting plate 110. Push in. Further, each cylinder 36 presses the closed second shutter 34 during firing of the object to be fired.

  As shown in FIG. 3, the firing chamber 40 mainly includes a base plate 42, a furnace body 44, and a hearth part 46. The base plate 42 is a plate-like body that supports the furnace body 44 and the hearth portion 46, and is preferably made of metal.

  The furnace body 44 includes a side furnace wall 44a and an upper furnace wall 44b, and forms a firing space V for firing the object to be fired together with the hearth portion 46. In order to reduce the heat capacity of the batch-type firing furnace 10 (firing chamber 40), the furnace body 44 can be formed of a fiber-based heat insulating material (for example, a ceramic fiber board). A plurality of firing heaters 48 for heating the inside of the firing space V are provided in the furnace body 44. The firing heater 48 is a linear rod-shaped electric heater, and is preferably formed of, for example, SiC or molybdenum disilicide. In addition, a thermocouple 50 for measuring the temperature in the firing space V is provided in the furnace body 44.

  In this embodiment, the hearth part 46 is provided in two rows so as to extend in the conveying direction of the sheath 100 for firing. As shown in FIGS. 4 and 5, the hearth part 46 includes a hearth 60, a plurality of support columns 62 and 64, and a pair of guide rails 66 and 68.

  The hearth 60 is disposed on the base plate 42 and is made of a substantially rectangular parallelepiped fiber-based heat insulating material (for example, a ceramic fiber board) in order to reduce the heat capacity of the batch firing furnace 10. The hearth 60 is provided with a plurality of holes 60a and 60b that penetrate in the vertical direction and have a diameter substantially equal to the outer diameter of the columns 62 and 64, and the columns 62 are respectively inserted therethrough. Yes. The holes 60a are arranged side by side along the conveying direction of the mounting plate 110 on one side of the hearth 60, and the holes 60b are mounted on the other side of the hearth 60. They are arranged side by side along the conveying direction of the plate 110.

  Each column 62 is inserted through each hole 60 a of the hearth 60, and each column 64 is inserted through each hole 60 b of the hearth 60. The base ends of the columns 62 and 64 are fixed to the base plate 42. On the other hand, the tip of each column 62 is connected to the guide rail 66, and the tip of each column 64 is connected to the guide rail 68. In addition, it is preferable that each support | pillar 62 and 64 is formed with ceramics, such as an alumina. Moreover, as each support | pillar 62 and 64, a hollow tube, a solid rod, etc. can be used suitably.

  Each of the guide rails 66 and 68 is a bar having a substantially L-shaped cross section. Each of the guide rails 66 and 68 has a support surface S that supports the mounting plate 110, and guides the mounting plate 110 by guide portions 66 a and 68 a extending upward from the support surface S. Each guide rail 66, 68 is formed with a plurality of recesses 66b, 68b at predetermined positions on the surface opposite to the support surface S. The guide rail 66 is connected to each column 62 by fitting the tip of each column 62 into each recess 66b. Moreover, the guide rail 68 is connected to each support | pillar 64 by each front-end | tip of each support | pillar 64 being fitted by each recessed part 68b. As a result, the guide rails 66 and 68 are both disposed in the firing sheath 100 so as to extend in the conveying direction of the baking sheath 100 so that the distance between them is substantially equal to the width of the mounting plate 110. 110 is restricted from moving in directions other than the conveyance direction. The guide rails 66 and 68 are preferably formed of ceramics such as alumina.

  Next, operation | movement of the batch type baking furnace 10 provided with the structure mentioned above is demonstrated.

  First, in a state where all the shutters 32 and 34 are closed, a sheathing sheath 100 filled with unfired products to be fired is placed on the placing plate 110 and placed on the placing plate 110. A plurality of sheaths 100 for firing are set on the conveyance path 20a. Then, after the first shutter 32 of the replacement chamber 30a is opened, these firing sheaths 100 are conveyed in the direction of arrow A in FIGS. 1 and 2B, and the firing sheath 100 is transferred to the replacement chamber 30a. It is sent. When a predetermined number of the sheaths 100 are sent into the replacement chamber 30a, the first shutter 32 of the replacement chamber 30a is closed again.

  Subsequently, the second shutter 34 of the replacement chamber 30 a is opened, the cylinder 36 is operated, and the pusher 36 a pushes the baking sheath 100 together with the mounting plate 110 into the baking chamber 40. The firing sheath 100 pushed into the firing chamber 40 is sequentially transferred to the back of the firing chamber 40 along the guide rails 64 a and 64 b provided on the hearth 46. When a predetermined number of firing sheaths 100 are pushed into the firing chamber 40 from the replacement chamber 30a, the second shutter 34 of the replacement chamber 30a is closed again.

  Thus, when the plurality of baking sheaths 100 are arranged in the baking chamber 40 together with the mounting plate 110, the products to be fired packed in the baking sheath 100 are fired. That is, the heater 48 is energized to increase the temperature in the firing space V until it reaches the firing temperature of the material to be fired, and the fired product is fired while maintaining the firing temperature for a predetermined time. Cool down. Then, after the cooling of the firing chamber 40 is completed, another firing sheath 100 set in the transport path 20a is transported to the replacement chamber 30a in the same procedure as described above, and then the replacement chamber 30a and the replacement chamber 30b. With the second shutter 34 released together, a plurality of firing sheaths 100 before firing are pushed into the firing chamber 40 by the pusher 36a. At this time, the sinter 100 after firing located in the sinter chamber 40 is conveyed to the replacement chamber 30b so as to be pushed out to the sheath 100 before firing.

  Subsequently, after the second shutters 34 of the replacement chamber 30a and the replacement chamber 30b are both closed, the first shutter 32 of the replacement chamber 30b is released, and the firing sheath 100 after firing is transferred to the transporting portion 20b by the transport unit 20b. 2 (b) is conveyed in the direction of arrow B.

  As described above, in this embodiment, the mounting plate 110 on which the baking sheath 100 in which the objects to be fired are packed is placed is supported by the pair of guide rails 66, 68, and each guide rail 66. , 68 are provided on the base plate 42 instead of the hearth 60. Therefore, the load of the sheath 100 and the mounting plate 110 is received by the base plate 42 through the guide rails 66 and 68 and the support columns 62 and 64, and is constituted by a relatively brittle material such as a fiber-based heat insulating material. It is not added to the existing hearth 60. As a result, it is possible to prevent the hearth 60 from being damaged by the load of the firing sheath 100 and the mounting plate 110 as the firing sheath 100 is conveyed. Thus, in this embodiment, since it is possible to use a fiber-type heat insulating material as the hearth 60, the heat capacity of the hearth 60 can be reduced, and a temperature difference is almost generated in the firing space V. Therefore, firing unevenness is less likely to occur in the product to be fired.

  Further, in the present embodiment, the mounting plate 110 on which the firing sheath 100 is placed is supported by a pair of guide rails 66 and 68, and each guide rail 66 and 68 extends in the conveying direction of the firing sheath 100. ing. Therefore, since the baking sheath 100 is transported along the guide rails 64a and 64b, the baking sheath 100 can be easily put into and out of the baking chamber 40.

  In the present embodiment, the tips of the columns 62 and 64 are fitted into the recesses 66 b and 68 b of the guide rails 66 and 68, and the base ends of the columns 62 and 64 are connected to the base member 42. Therefore, when the mounting plate 110 moves on the guide rails 66 and 68, the support columns 62 and 64 are prevented from bending due to frictional force generated between the mounting plate 110 and the guide rails 66 and 68. It is restrained and damage to the hearth 60 is prevented.

  Next, based on FIGS. 6-9, the modification of the batch type baking furnace 10 which concerns on embodiment mentioned above is demonstrated. Hereinafter, different points will be mainly described, and description of common points will be omitted or simplified.

  With reference to FIG.6 and FIG.7, the batch type baking furnace 10 which concerns on a 1st modification is demonstrated. FIG. 6 is a perspective view showing a part of the hearth according to the first modification. FIG. 7 is an exploded perspective view showing a part of the hearth according to the first modification. In the firing furnace 10 according to the first modification, the configuration of the hearth part 146 is different from the batch-type firing furnace 10 according to the above-described embodiment.

  As shown in FIGS. 6 and 7, the hearth part 146 includes a hearth 160 disposed on the base plate 42, a plurality of support columns 62 and 64, a plurality of support columns 162, a pair of guide rails 66 and 68, and an auxiliary unit. A rail 166 is used.

  In addition to the holes 160a and 160b through which the columns 62 and 64 are inserted, the hearth 160 is provided with a plurality of holes 160c penetrating in the vertical direction and having a diameter substantially equal to the outer diameter of the column 162. Yes. Note that the holes 160 are arranged side by side in the substantially central portion of the hearth 160 along the conveying direction of the mounting plate 110.

  Each support column 162 is inserted through each hole 160 c of the hearth 160. The base end of each column 162 is fixed to the base plate 42. On the other hand, the tip of each column 162 is connected to the auxiliary rail 166. In addition, it is preferable that each support | pillar 162 is formed with ceramics, such as an alumina. Moreover, as each support | pillar 162, a hollow tube, a solid rod, etc. can be used suitably.

  The auxiliary rail 166 is a bar having a substantially square cross section. A plurality of recesses 166 b are formed in the auxiliary rail 166 at predetermined positions on the surface facing the hearth 160. The auxiliary rail 166 is connected to each column 162 by fitting the tip of each column 162 to each recess 166b. The auxiliary rail 166 is provided so that the upper surface thereof has a height substantially equal to the support surface S of the guide rails 66 and 68, and supports the mounting plate 110 together with the guide rails 66 and 68. The auxiliary rail 166 is preferably formed of ceramics such as alumina.

  Thus, in the hearth part 146 of the first modified example, the base end of each column 162 is connected to the base plate 42, the auxiliary rail 166 is connected to the tip end of these columns 162, The upper surface and the support surface S of the guide rails 66 and 68 have substantially the same height. Therefore, since the mounting plate 110 is supported by the upper surface of the auxiliary rail 166 in addition to the support surface S of the guide rails 66 and 68, deformation of the mounting plate 110 can be prevented. When the mounting plate 110 is supported by the guide rails 66 and 68 and the auxiliary rail 166 as in the first modification, the guide rails 66 and 68 are harder than the mounting plate 110, and the mounting plate 110 is This is particularly effective when it is easily deformed.

  Next, with reference to FIG.8 and FIG.9, the batch type baking furnace 10 which concerns on a 2nd modification is demonstrated. FIG. 8 is a perspective view showing a part of the hearth according to the second modification. FIG. 9 is an exploded perspective view showing a part of the hearth according to the second modification. In the firing furnace 10 according to the second modification, the configuration of the hearth part 246 is different from the batch-type firing furnace 10 according to the above-described embodiment and the second modification.

  As shown in FIGS. 8 and 9, the hearth part 246 includes a hearth 60 disposed on the base plate 42, a plurality of support columns 62 and 64, a pair of guide rails 266 and 268, and a round bar 270. ing.

  Each of the guide rails 266 and 268 is a bar having a substantially L-shaped cross section. Each of the guide rails 266 and 268 has a support surface S that supports the mounting plate 110, and guides the mounting plate 110 by guide portions 266 a and 268 a extending upward from the support surface S. Each guide rail 266, 268 has a plurality of recesses 266 b, 268 b formed at predetermined positions on the surface located on the opposite side of the support surface S. The guide rail 266 is connected to each column 62 by fitting the tip of each column 62 to each recess 266b. Moreover, the guide rail 268 is connected to each support | pillar 64 by each front-end | tip of each support | pillar 64 being fitted by each recessed part 268b. As a result, the guide rails 266 and 268 are both arranged in the firing sheath 100 so as to extend in the conveyance direction of the sheath 100 and the distance between them is substantially equal to the width of the mounting plate 110. 110 is restricted from moving in directions other than the conveyance direction. Further, the guide rails 266 and 268 are formed at three locations so that the notch portions 266a and 268a cut out in a substantially semicircular shape on the support surface S correspond to each other. The guide rails 266 and 268 are preferably formed of ceramics such as alumina.

  Each round bar 270 has one end engaged with the notch 266a of the guide rail 266 and the other end engaged with the notch 268a of the guide rail 268 corresponding to the notch 266a. It is held rotatably. Each round bar 270 held by the guide rails 266 and 268 is provided so that the upper portion of the outer peripheral surface thereof is substantially equal to the support surface S of each guide rail 266 and 268, together with the guide rails 266 and 268. The mounting plate 110 is supported. Each round bar 270 is preferably formed of ceramics such as alumina. Moreover, as each round bar 270, a hollow tube, a solid bar, etc. can be used suitably.

  Thus, in the hearth part 246 of the second modified example, each round bar 270 is rotatably held by the guide rails 266, 268, and the upper part of the outer peripheral surface of each round bar 270 and the support of the guide rails 266, 268 are supported. The height of the surface S is substantially equal. Therefore, since the mounting plate 110 is supported by each of the round bars 270 in addition to the support surface S of the guide rails 266 and 268, deformation of the mounting plate 110 can be prevented. When the mounting plate 110 is supported by the guide rails 266 and 268 and the round bars 270 as in the second modification, the guide rails 66 and 68 are harder than the mounting plate 110, and the mounting plate 110. This is particularly effective in the case where is easily deformed. Moreover, since each round bar 270 rotates with conveyance of the mounting board 110, conveyance of the mounting board 110 which mounted the sheath 100 for baking becomes smoother.

  As mentioned above, although preferred embodiment and the modification of this invention were demonstrated in detail, this invention is not limited to above-described embodiment and modification. For example, a gap may be provided between the base plate 42 and the hearth 60, 62, 160, 260.

It is a perspective view showing the outline of the whole batch type calcination furnace concerning this embodiment. (A) is side surface sectional drawing of the batch type baking furnace which concerns on this embodiment, (b) is upper surface sectional drawing of the batch type baking furnace which concerns on this embodiment. (A) is side surface sectional drawing of the baking chamber which concerns on this embodiment, (b) is upper surface sectional drawing of the baking chamber which concerns on this embodiment. It is a perspective view which shows a part of hearth which concerns on this embodiment. It is a disassembled perspective view which shows a part of hearth concerning this embodiment. It is a perspective view which shows a part of hearth concerning a 1st modification. It is a disassembled perspective view which shows a part of hearth concerning a 1st modification. It is a perspective view which shows a part of hearth concerning a 2nd modification. It is a disassembled perspective view which shows a part of hearth concerning a 2nd modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Batch type firing furnace, 40 ... Firing chamber, 42 ... Base plate, 44 ... Furnace body, 46.146, 246 ... Hearth part, 60, 160 ... Hearth, 62, 64, 162 ... Post, 66, 68 , 266, 268 ... guide rail, 100 ... firing sheath, 110 ... mounting plate, 166 ... auxiliary rail, 266a, 268a ... notch, 270 ... round bar.

Claims (3)

A batch-type firing furnace for firing an object to be fired,
A base member;
A hearth composed of a fiber-based heat insulating material disposed above the base member and formed with a plurality of holes penetrating in the vertical direction;
A plurality of support columns each having a base end connected to the base member and inserted through the hole of the hearth;
A pair of rail members extending in the conveying direction of the object to be fired and connected to the ends of the plurality of columns,
A mounting plate that is supported by the pair of rail members and on which the object to be fired is mounted;
The batch-type firing furnace, wherein the mounting plate moves on the pair of rail members. A plurality of holes that are penetrated in the vertical direction and different from the plurality of holes are formed in the hearth,
A plurality of struts different from the plurality of struts each having a base end connected to the base member and inserted through the other hole of the hearth,
An auxiliary member connected to the ends of the other plurality of support columns and supporting the mounting plate together with the pair of rail members;
The batch-type firing furnace according to claim 1, wherein the auxiliary member is disposed between the pair of rail members. A plurality of rotating members that span the pair of rail members and support the mounting plate together with the pair of rail members;
2. The batch-type firing furnace according to claim 1, wherein each of the rotating members is held by a plurality of holding portions provided at positions corresponding to each other in the pair of rail members.

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