JPH0886571A - Belt conveyor type treating apparatus - Google Patents

Abstract

PURPOSE: To facilitate sufficient gas sealing, to treat an unstable object in the atmosphere and to uniformly treat the object to be conveyed by providing gas supply means at a belt conveyor in which gas can flow, and disposing the conveyor in a treating chamber formed in a furnace body. CONSTITUTION: This belt conveyor type treating apparatus 1 comprises a hollow annular unit 2, a belt conveyor 3 having a belt circumferentially driven in the unit 2 so that gas can flow, and a gas introducing duct 25a for supplying gas from the inside of a belt circulating track to the conveyor 20 of the belt 9, wherein the conveyor 20 of the belt 9 is disposed in a treating chamber 24 formed in a furnace body 25 formed partly of the unit 2. Thus, it is not necessary to gas seal to prevent gas leakage from the interior of the unit 2 between the belt 9 and the unit 2, but the unit 2 may be gas sealed. The object to be conveyed is not brought into contact with the outdoor air, and the gas can be fed to the object on the conveyor 20 from the inside of the track of the belt 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor type processing apparatus used for supplying gas to an object to be conveyed by a belt conveyor to perform processing such as oxidation, reduction, heating and cooling. It is used for producing metal powder by reducing powders such as iron oxide.

[0002]

[Prior Art and Problems to be Solved by the Invention]
The belt conveyor type processing apparatus disclosed in Japanese Patent Publication No. 9-167397 discloses a belt conveyor having a belt that is orbitally driven, a furnace body that surrounds only the conveyor section of the belt, and the conveyor section from outside the belt orbit. Means for supplying gas. Since the belt is covered only with the furnace body and is exposed to the atmosphere except for the conveyor part, a gas seal for preventing gas leakage from the inside of the furnace body is provided between the belt driven around the furnace and the furnace body. However, it is difficult to sufficiently seal the gas. Further, since the transported symmetrical object comes into contact with the outside air, the symmetrical object unstable in the atmosphere cannot be processed. Furthermore, since the gas is supplied to the object to be conveyed from the outside of the orbit of the belt, it is difficult to heat the object to be conveyed uniformly.

A belt conveyor type processing apparatus disclosed in Japanese Patent Application Laid-Open No. 58-110601 is a belt conveyor having a belt in which gas can be circulated and which is capable of circulating gas, a furnace body surrounding only a conveyor portion of the belt, and And a means for supplying gas from the inner side of the circular orbit of the belt to the conveying section. Since the belt is covered only with the furnace body and is exposed to the atmosphere except for the conveyor part, a gas seal for preventing gas leakage from the inside of the furnace body is provided between the belt driven around the furnace and the furnace body. However, it is difficult to sufficiently seal the gas. Further, since the transported symmetrical object comes into contact with the outside air, the symmetrical object unstable in the atmosphere cannot be processed.

The belt conveyor type processing apparatus disclosed in Japanese Patent Application Laid-Open No. 3-152389 discloses a belt conveyor having a belt that is driven in an orbit, a furnace body surrounding only the conveyor section for the belt, and a belt for the conveyor section. Means for supplying gas from the outside of the orbit. Since the belt is covered only with the furnace body and is exposed to the atmosphere except for the conveyor part, a gas seal for preventing gas leakage from the inside of the furnace body is provided between the belt driven around the furnace and the furnace body. A water seal tank is provided between them. Therefore, the gas seal structure becomes complicated, the apparatus becomes large, and the manufacturing cost increases. Also,
Since the gas is supplied to the object to be conveyed from the outside of the circular orbit of the belt, it is difficult to uniformly heat and process the object to be conveyed. Further, the conveyance surface, which becomes a convex curved surface at the position where the belt is wound around the sprocket, becomes a concave curved surface when passing through the water seal tank. Then, even if both ends of the belt are raised to form side walls to prevent the conveyed product from falling, the side walls prevent the conveying surface from becoming a concave curved surface. Therefore, the side walls cannot be formed by raising both ends of the belt.

The belt conveyor type processing apparatus disclosed in Japanese Patent Application Laid-Open No. 61-161146 includes a furnace body, a belt conveyor having a belt that is driven to rotate in the furnace body, and a heater for heating the furnace body. I have it. The furnace body has a large volume because it covers the entire belt as well as the belt conveyor, and the heater heats the entire furnace body, so it is difficult to make the temperature distribution in the furnace body uniform. It is difficult to uniformly heat and process the material.

A mesh belt 10 shown in FIGS. 9 and 10 is used as a conveyor belt through which gas and liquid can flow.
1 is used. The belt 101 includes a bottom wall 102 for placing an object to be conveyed, and a pair of chains 103 that are wound around a sprocket (not shown) and are driven to rotate. The support members 104 are connected at a plurality of positions spaced in the direction. The bottom wall 102 has a plurality of unit belts 10 arranged in parallel along the belt circumferential direction (direction of arrow A in FIG. 9).
5, a connecting member 1 for connecting the adjacent unit belts 105
06 and.

As shown in FIGS. 11 and 12, each unit belt 105 is made flat by a metal wire rod along a spiral around the belt width direction (direction of arrow B in FIG. 9, FIG. 10, and FIG. 11 (1)). Each connecting member 106 is made of a metal wire along the belt width direction. Each unit belt 105
The spiral wire rods forming the adjacent unit belts 105 are positioned in the gaps δ between the spiral wire rods forming the unit belts 105, and the wire rods forming the connecting members 106 are adjacent to each other.
A space 10 surrounded by a pair of spiral wire rods constituting the
Inserted in 7. As shown in (2) of FIG. 11, the adjacent unit belts 105 are in the state of being relatively extended in the belt circumferential direction, and the adjacent unit belts 105 are extended further in the belt circumferential direction. The connecting material 106
Blocked by. In addition, each of the support members 104 has a space 1 surrounded by spiral wire rods forming the unit belt 105 at a plurality of positions spaced apart in the belt circumferential direction.
08 is fixed to the unit belt 105 via rivets or the like, and each end of the unit belt 105 is fixed to the links 103a constituting the chain 103 via rivets or the like.

In the mesh belt 101 as described above,
The object to be conveyed placed on the bottom wall 102 may fall from the side. Further, as indicated by an imaginary line C in FIG. 10, when the object to be conveyed is a powder or granular material having a small angle of repose, the height of the object to be conveyed is limited near the widthwise ends of the bottom wall 102, and the object to be conveyed is The object cannot be conveyed at a uniform height in the belt width direction. Therefore, for example, when a high temperature gas is passed through the mesh belt 101 to heat-treat an object to be conveyed, uniform heat treatment cannot be performed.

Therefore, it is conceivable to bend both ends of the bottom wall 102 to form side walls rising from the bottom wall 102. However, on the bottom wall 102, the adjacent unit belts 105 are in the state of being relatively extended in the belt circumferential direction. In addition, the pitch of the support members 104 that connect the bottom wall 102 and the chains 103 is constant. Therefore, at the position where the chain 103 bends along the sprocket, the guide roller, etc., if the radius of curvature on the tip side of the side wall becomes larger than the radius of curvature of the bottom wall, the unit belts adjacent to each other on the tip side of each side wall. 105 is relatively pulled in the belt circumferential direction. The pulling force can be absorbed by elastic deformation of the unit belt 105 and the connecting member 106 if the amount of rising of the side wall is small. However, if the amount of rising of the side wall becomes large, the belt 101 will be damaged by the pulling force.

Therefore, as shown in a comparative example of FIG. 13, every other side wall 109 has a length of the connecting material which is equal to that of the side wall 1.
By making it shorter than the rising amount H of 09, each of the unit belts 105 on the tip end side of the side wall 109 can relatively extend in the belt circumferential direction with respect to the adjacent unit belts 105 in one circumferential direction. The long connecting material 106a is welded to both of the adjacent unit belts 105, and the short connecting material 106b is adjacent to the unit belt 1.
05 was not linked to both sides. According to this configuration, even if the rising amount H of the side wall 109 increases, the unit belts 105 adjacent to each other at the bending position of the chain 103.
Do not pull relative to each other in the belt circumferential direction.

However, the spiral wire rods forming the unit belts 105 adjacent to each other, which are connected by the short connecting member 106b, have gaps between the spiral wire rods forming the adjacent unit belts 105 at the bending position of the chain 103. Since it escapes from the side wall 109, a gap S is formed between the unit belts 105 adjacent to each other on the leading end side of the side wall 109. Then, even if the bending of the chain 103 is released, the side wall 1
The spiral wire rods forming the unit belt 105 on the leading end side of 09 cannot enter the gap between the spiral wire rods forming the adjacent unit belt 105 again, and the function of the side wall 109 is impaired.

An object of the present invention is to provide a belt conveyor type processing apparatus which can solve the above problems.

[0013]

A belt conveyor type processing apparatus according to the present invention comprises a hollow annular body, a belt conveyor having a belt through which gas can flow and which is orbitally driven in the annular body, and a conveyor for the belt. And a means for supplying gas from the inner side of the belt orbit, and the belt transport section is disposed in a processing chamber formed in a furnace body formed by a part of the annular body.

A heating means is preferably provided so as to surround the processing chamber.

The belt is provided with a conveying section having side walls rising from both ends of a bottom wall for placing an object to be conveyed, and a winding section wound around a driving member and driven to rotate, and the bottom of the conveying section. The wall and the winding portion are mesh belts connected at a plurality of circumferentially spaced positions, and the conveying portion thereof has a plurality of unit belts arranged in parallel along the belt circumferential direction and adjacent unit belts. And a connecting member for connecting each unit belt, each unit belt is configured by a wire along the spiral around the belt width direction in the bottom wall and along the spiral around the rising direction in the side wall, and each connecting member is , The bottom wall is formed of a wire along the belt width direction and the side wall is along the rising direction, and the unit adjacent to the gap of the spiral wire forming each unit belt. The spiral wire rods that form the belt are positioned, the wire rods that form each connecting member are inserted into the space surrounded by the pair of spiral wire rods that form the adjacent unit belts, and the adjacent unit belts are It is preferable that the bottom wall is in a more contracted state than the most elongated state in the belt circumferential direction. The diameter of the wire rod forming each connecting member is D ₁ , the diameter of the spiral wire rod forming each unit belt is D ₂ , and the connecting member in the state where the adjacent unit belts are relatively extended most in the belt circumferential direction. Pitch is W
max, where W is the average pitch of the connecting members 41 on the bottom wall, W is 2Wmax> 2W ≧ (Wmax + D ₁ +2
It is preferably set so as to satisfy D ₂ ).

The connecting interval between the bottom wall and the winding portion in the belt circumferential direction is L, the radius of curvature at the position where the winding portion has the largest curvature is r, the rising height of the side wall is H, and each connecting member is The diameter of the constituent wire material is D ₁ , the diameter of the spiral wire material that constitutes each unit belt is D ₂ , and the pitch of the connecting material is Wmax when the adjacent unit belts are relatively extended most in the belt circumferential direction. Z = 2 [(r +
H) / L] × sin ⁻¹ (L / 2r), Y = 2Wmax /
As (Wmax + D ₁ + 2D ₂ ), Wmax is preferably set so as to satisfy Y ≧ Z.

[0017]

According to the construction of the present invention, since the conveyor belt which is orbitally driven is arranged in the hollow annular body, the gas seal for preventing gas leakage from the inside of the annular body is orbitally driven. It is not necessary to perform the sealing between the belt and the annular body, and it is sufficient to perform the gas sealing of the annular body, so that sufficient gas sealing can be easily performed.
Further, the transported symmetrical object does not come into contact with the outside air, and it is possible to process an unstable symmetrical object in the atmosphere. Further, since the gas reaches the object to be conveyed on the belt conveying unit from the inside of the circulation path of the belt through which the gas can flow, the object to be conveyed can be uniformly processed. Further, since the conveyor part of the belt is arranged in the processing chamber formed in the furnace body formed by a part of the annular body, it is possible to limit the processing space of the object to be conveyed on the conveyor part, and to make it more uniform. The object to be transported can be processed.

By providing the heating means so as to surround the processing chamber, the processing chamber can be heated uniformly.

Since the conveyor section of the belt has side walls rising from both ends of the bottom wall, the object to be conveyed placed on the bottom wall can be prevented from falling from the side, and the granular material having a small angle of repose, etc. The object to be conveyed can be conveyed at a uniform height in the belt width direction.

On the bottom wall, the adjacent unit belts are contracted relative to each other in the belt circumferential direction rather than the most expanded state, so that the radius of curvature of the bottom wall is increased at the bending position of the wound portion. Even if the radius of curvature on the tip side of the side wall is larger than that, the unit belts adjacent to each other on the tip side of each side wall can relatively extend in the belt circumferential direction. This makes it possible to reduce or eliminate the pulling force acting on each unit belt at the tip end side of the side wall, so that the belt will not be damaged even if the amount of rising of the side wall is large. In addition, since it is not necessary to make the length of the connecting member on the side wall shorter than the rising amount of the side wall, the spiral wire rods forming the unit belt on the side wall are separated from the gaps between the spiral wire rods forming the adjacent unit belt. It does not come out and the function of the side wall is not impaired. Specifically, in order to make the unit belts adjacent to each other on the bottom wall thereof contract more than the most expanded condition in the belt circumferential direction, 2Wmax> 2
W may be set so as to satisfy W ≧ (Wmax + D ₁ + 2D ₂ ).

2 (r + H) × sin ⁻¹ (L / 2r) is
Since the tip of the side wall at the connection interval L in the belt circumferential direction between the transport unit and the winding unit is the arc length drawn at the position where the curvature of the winding unit is the largest, the arc length is wrapped around the transport unit. Interval L in the circumferential direction of the belt
The value Z divided by indicates the required belt elongation.
On the other hand, 2Wmax is the pitch between the connecting member and the one connecting member when the pair of unit belts adjacent to each other is relatively extended most in the belt circumferential direction, and Wmax + D ₁ +
2D ₂ is the pitch between the connecting material and the one connecting material in a state where the pair of adjacent unit belts are relatively contracted in the belt circumferential direction, so the value of Y can be obtained. The maximum elongation of the belt is shown. Therefore, if Y ≧ Z, the maximum elongation of the belt that can be obtained is equal to or higher than the required elongation of the belt. This makes it possible to eliminate the pulling force acting on each unit belt when the adjacent unit belts are relatively stretched in the belt circumferential direction at the position where the wrapping portion is bent at the tip end side of the side wall.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a belt conveyor type processing apparatus 1 used for producing metal powder, for example, a hollow annular body 2 which is a closed vessel, and a belt installed inside the annular body 2. And a conveyor 3. As shown in FIG. 2, the cross-sectional shape of the annular body 2 is substantially rectangular,
It is supported by the base 8. The belt conveyor 3
Has an endless belt 9 in which the gas can flow and which is driven to rotate in the annular body 2.
Is arranged in a processing chamber 24 formed in a furnace body 25 formed by a part of the annular body 2. That is, the furnace body 25 is constituted by the upper part of the annular body 2 and surrounds substantially the entire area of the conveyor 20 of the belt 9, and the inside thereof is the processing chamber 24. The furnace body 25 is covered with a heat insulating material 26, and the heat insulating material 26 supports a plurality of heaters (heating means) 27 surrounding the processing chamber 24. The heat insulating material 26 is supported on the base 8 via columns 26a. Each heater 27 is connected to a control device (not shown) via a terminal box 28, and controls the temperature of the processing chamber 24 to a desired temperature. The portions forming the annular body 2 in the vicinity of both ends of the furnace body 25 are bellows tubes 29, and the bellows tubes 29 are contracted in accordance with the temperature change to prevent the generation of thermal stress.

Four gas introducing duct portions 25a project downward from the lower portion of the furnace body 25, each gas introducing duct portion 25a penetrates the heat insulating material 26, and the lower end of the gas introducing duct portion 25a has a first gas supplying portion, The second pipes 4a and 4b are connected.
The first gas supply pipe 4a is connected to the gas introducing duct portion 25a located most upstream in the transport direction, and is connected to, for example, a nitrogen gas supply source (not shown). The second gas supply pipe 4b is connected to the other three gas introduction ducts 25a via the three-pronged portion, and is connected to, for example, a mixed gas supply source (not shown) of nitrogen gas and hydrogen gas. The gas introduced into the processing chamber 24 through the gas supply pipes 4a and 4b is supplied to the conveying portion 20 of the belt 9 from the inner side of the belt circulation track. At that time, since the gas is uniformly dispersed and supplied to the transport unit 20, the gas dispersion plate 10 having the respective pores between the gas introducing duct portions 25 a and the belt 9.
Is arranged. The gas that has passed through the dispersion plate 10
A baffle 65 covering the inner surface of the furnace body 25 and the conveyor unit 20 is attached to the furnace body 25 so that the belt 9 can be effectively supplied to the conveyor unit 20 without passing outside the conveyor unit 20. ing.

As the gas dispersion plate 10, various shapes such as a porous plate, a sintered metal plate, a wire mesh type and a cap type can be adopted. One dispersion plate 10 may be installed according to the effective heat treatment length of the belt 9, or several dispersion plates 10 may be installed continuously in the conveyance direction of the belt 9. Also,
The supply of the gas is performed by a blower or the like having a discharge pressure equal to or higher than the pressure loss when the gas flows through the gas dispersion plate 10, the belt 9 and the object to be conveyed.

From the upper part of the furnace body 25, the gas discharge duct portion 25b projects upward, and the gas discharge duct portion 2
5b penetrates the heat insulating material 26, and the gas discharge pipe 5 is connected to the upper end thereof. The gas discharge pipe 5 is connected to the water sealing tank 13 in order to maintain the airtightness of the annular body 2. As a result, the gas introduced into the processing chamber 24 can be discharged to the outside of the annular body 2 via the gas discharge pipe 5 and the water sealing tank 13.

Outside the processing chamber 24, the belt 9
In order to enable the object to be processed to be supplied as an object to be conveyed upstream of the conveying unit 20 in the conveying direction, the raw material storage tank 11 is provided in the annular body 2.
Are connected via a raw material feeder 6 composed of, for example, a screw feeder. Outside the processing chamber 24, the discharge guide 7 that guides the object to be conveyed falling from the conveying direction downstream of the conveyor section 20 of the belt 9 to the product storage tank 12 connected to the annular body 2 via the valve body 14 is annular. Body 2
It is provided inside. It should be noted that the insides of the raw material storage tank 11 and the product storage tank 12 have gas inlets / outlets 15, 16, 1 so that the reducing gas and the reduced products do not come into direct contact with the atmosphere.
It is purged with nitrogen gas or the like flowing in and out through Nos. 7 and 18.

In the case where, for example, a metal powder is produced by the treatment device 1, the material to be reduced, which is obtained by granulating an iron compound powder containing hydrous iron oxide, iron oxide, etc., is conveyed from the raw material storage tank 11 to the belt 9 by the raw material feeder 6. It is continuously supplied onto the section 20 as the object to be conveyed. On the other hand, a reducing gas such as pure hydrogen gas, CO gas, or a mixed gas containing an inert component of these gases heated by a heat exchanger outside the annular body 2 is introduced into the processing chamber 24, and the dispersion plate 10 is It is distributed and supplied to the conveyance section 20 of the belt 9 from the inside of the circulating track. As a result, the reducing gas reaches the substance to be reduced which is conveyed by the conveying unit 20, and the substance to be reduced is continuously heated and reduced while being conveyed by the belt conveyor 3, and metal powder is obtained as a reduced substance. At that time, the processing chamber 24 has a heater 27.
Is heated to maintain the temperature. The obtained reduced product is collected in the product storage tank 12. Further, the gas used for the reduction of the substance to be reduced is discharged to the outside of the annular body 2 via the water sealing tank 13. The gas flow rate, the residence time in the treatment chamber 24, the treatment temperature, and the like are appropriately set according to the purpose of treatment and the type and particle size of the object to be conveyed, and the residence time is adjusted by changing the circulating speed of the belt. It is possible.

According to the above treatment apparatus 1, the conveyor belt 9 which is orbitally driven is arranged in the hollow annular body 2, so that the gas seal for preventing gas leakage from the inside of the annular body 2 is orbitally driven. It is not necessary to perform the sealing between the belt 9 and the annular body 2, and it is sufficient to perform the gas sealing of the annular body 2. Therefore, sufficient gas sealing can be easily performed. Furthermore, the substance to be reduced does not come into contact with the outside air, and the reduced substance that becomes unstable in the atmosphere can be treated. Further, since the gas reaches the object to be conveyed on the belt conveying unit 20 from the inside of the orbit of the belt 9 through which the gas can flow, the object to be conveyed can be uniformly processed. Further, the belt transport unit 2
0 is arranged in the processing chamber 24 formed in the furnace body 25 formed by a part of the annular body 2, so that the processing space of the object to be transferred on the transfer section 20 can be limited, and more uniform. The object to be transported can be processed. Since the heater 27 is provided so as to surround the processing chamber 24, the inside of the processing chamber 24 can be heated uniformly. The heating means of the processing chamber 24 is not limited to the heater 27.

As shown in FIGS. 4 and 5, the endless belt 9 constituting the belt conveyor 3 has a conveying section 20 having side walls 22 and 23 rising from both ends of a bottom wall 21 for placing an object to be conveyed, As shown in FIG. 1, a pair of drive sprockets 31, which are drive members, a driven sprocket 32, and a pair of chains (winding portions) 30 wound around the chain guides 33 and 34 are provided. The drive sprocket 31 is rotationally driven by a motor or the like, so that the belt 9
Is orbitally driven. The bottom wall 21 and the chain 30 are
As will be described later, the support members 50 are connected at a plurality of positions spaced in the circumferential direction. A support 66 for the belt 9 is provided below the annular body 2.

As shown in FIG. 3, each drive sprocket 3
The rotating shaft 71 of No. 1 is supported by the annular body 2 via a bearing,
The rotary shaft 71 is connected to the output shaft of the speed reducer 73 via the chain winding transmission mechanism 72, and the input shaft of the speed reducer 73 is connected to the output shaft of the geared motor 75 via the chain winding transmission mechanism 74. There is. The rotary shaft 71
A shaft seal 7 is provided between the ring 2 and the annular body 2 to provide a gas seal.
6 are provided.

As shown in FIG. 1, the driven sprocket 32 is attached to a slider 36 which is movably supported by a rail 35 fixed to the annular body 2, and a weight 37 is connected to the slider 36 so that a chain 37 is formed. Tension is applied to 30.

As shown in FIG. 4, the conveying section 20 has a plurality of unit belts 40 arranged in parallel along the belt circumferential direction (direction of arrow A in FIG. 4) and unit belts 40 adjacent to each other.
And a connecting member 41 for connecting.

As shown in (1) and (2) of FIG. 6, each unit belt 40 has a belt width direction in the bottom wall 21 (direction of arrow B in FIGS. 4, 5 and 6 (1)). ) A flat metal wire is formed along the spiral around the side walls 22 and 23 and along the spiral around the rising direction (direction of arrow C in FIG. 5). Each connecting material 41
Is formed of a metal wire along the belt width direction on the bottom wall 21 and along the rising direction on the side walls 22 and 23.

The spiral wire rods forming the adjacent unit belts 40 are positioned in the gaps δ between the spiral wire rods forming the unit belts 40, and the wire rods forming the connecting members 41 are adjacent to each other. It is inserted into a space 42 surrounded by a pair of spiral wire rods constituting 40. Further, as shown in FIG. 7, one connecting member 41 is one unit belt 40.
Is connected to the end portions of the side walls 22 and 23 via a welded portion 49, and is located at one end side of the unit belt 40 in the belt circumferential direction. After the welding, the wire rods forming the unit belts 40 and the wire rods forming the connecting members 41 are bent to form the bottom wall 21 and the side walls 22 and 23. As a result, the transport unit 20 has a mesh structure. The mesh openings, that is, each unit belt 40
The gap δ between the spiral wire rods forming the
When conveying a powder or granule having a size of m or more, the distance is 1.5 mm or less.

As shown in FIG. 6 (2), the unit belts 40 adjacent to each other are in a state of being contracted in the bottom wall 21 rather than being relatively extended in the belt circumferential direction. That is, in the unit belt 105 shown in the conventional example,
The adjacent unit belts 105 are prevented from further extending in the belt circumferential direction by the connecting member 106, whereas the adjacent unit belts 40 of the present embodiment are relatively extended in the belt circumferential direction. Further extension is not blocked by the connecting member 41. In this embodiment, the pair of unit belts 105 adjacent to each other is in the most contracted state in the belt circumferential direction, the average pitch of the connecting members 41 in that state is W, and the unit belts 40 adjacent to each other are belts. The pitch of the connecting material in the most extended state in the circumferential direction is W
As max, 2W = (Wmax + D ₁ + 2D ₂ ).

Further, each of the support members 50 is inserted into a space 43 surrounded by a spiral wire rod forming the unit belt 40 on the bottom wall 21 at a plurality of positions spaced apart in the belt circumferential direction, and the unit thereof is formed. The belt 40 is fixed by rivets or the like, and each end of the belt 40 is fixed to the links 30a constituting the chain 30 by rivets or the like.

As shown in FIG. 8, the connection distance L between the bottom wall 21 and the chain 30 in the circumferential direction is set to 152 mm, and the chain 30 has a maximum curvature at the winding position around the drive sprocket 31 and the driven sprocket 32. The radius of curvature r is 227 mm, the rising height H of each of the side walls 22 and 23 is 82 mm, the diameter D ₁ of the wire rod forming each connecting member 41 is 1.6 mm, and each unit belt 4
The diameter D ₂ of the spiral wire rod forming 0 was 1.2 mm. Thus, maximum elongation Y = 2Wmax / (Wmax + D 1 + 2D 2) elongation Z = 2 of the request belt 9 of the belt 9 which can be obtained [(r + H) / L] × sin
^To obtain ^-1 (L / 2r) or more, Wmax ≥ (D ₁ + 2D
₂ ) Since it is necessary to set Wmax so that Z / (2-Z) = 9.1 mm, Wmax is set to 9.9 mm.

According to the structure of the belt 9 described above, the conveying portion 20 of the belt 9 has the side walls 22 rising from both ends of the bottom wall 21,
Since it has 23, it is possible to prevent the transfer target placed on the bottom wall 21 from falling from the side, and to transfer the transfer target such as powder particles having a small angle of repose at a uniform height in the belt width direction. Can be transported.

In the bottom wall 21, the adjacent unit belts 40 are in a more contracted state than the most elongated state in the belt circumferential direction. Side wall 2 rather than radius of curvature
Even if the radii of curvature on the leading end sides of 2 and 23 become larger, as shown in FIG. 7, the unit belts 40 adjacent to each other on the leading end sides of the side walls 22 and 23 should relatively extend in the belt circumferential direction. You can This allows the side wall 22,
Since the tensile force acting on each unit belt 40 at the tip end side of 23 can be reduced or eliminated, the belt 9 will not be damaged even if the side walls 22 and 23 have a large rising amount. Further, since it is not necessary to make the length of the connecting member 41 on the side walls 22 and 23 shorter than the rising amount of the side walls 22 and 23, a unit in which the spiral wire rods that form the unit belt 40 are adjacent to the side walls 22 and 23 is a unit. It does not come out from the gap between the spiral wire rods that form the belt 40, and the functions of the side walls 22 and 23 are not impaired.

Further, in the above embodiment, the maximum elongation Y of the belt 9 that can be obtained is set to be equal to or larger than the required elongation Z of the belt 9. Therefore, at the position where the chain 30 bends, the side walls 22, When the unit belts 40 adjacent to each other on the tip end side of 23 are relatively elongated in the belt circumferential direction, the tensile force acting on each unit belt 40 can be eliminated.

The present invention is not limited to the above embodiment. For example, the belt may have an opening that allows gas to flow and holds an object to be conveyed. Further, the processing content by the belt conveyor type processing device is not particularly limited,
For example, the object to be conveyed may be blown with gas to heat or cool it. In the above embodiment, Wmax
Is set to a value larger than the lower limit value of 9.1 mm to allow a margin, so 2 W is (Wmax + D ₁ +2
It may be larger than D ₂ ), and even in that case, the tensile force acting on each unit belt 40 can be eliminated.
Further, Wmax may be set to be smaller than the lower limit value of 9.1 mm, and in that case, the pulling force acting on each unit belt 40 cannot be completely eliminated, but if it is a slight pulling force. It can be absorbed by elastic deformation of the belt 9.

[Brief description of drawings]

FIG. 1 is a side sectional view of a belt conveyor type processing apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the belt conveyor type processing device.

FIG. 3 is a plan view of a drive unit of the belt conveyor type processing apparatus.

FIG. 4 is a partial plan view of a mesh belt according to an embodiment of the present invention.

FIG. 5 is a partial front sectional view of the mesh belt of the embodiment.

FIG. 6 is a partially enlarged plan view of (1) and a partially enlarged sectional view of the mesh belt of the embodiment.

FIG. 7 is an operation explanatory view of the side wall of the mesh belt of the embodiment.

FIG. 8 is an explanatory diagram of the dimensional relationship of the mesh belt of the embodiment.

FIG. 9 is a partial plan view of a conventional mesh belt.

FIG. 10 is a partial front sectional view of the mesh belt of the conventional example.

FIG. 11 is a partially enlarged plan view of a mesh belt of the conventional example, and FIG.

FIG. 12 is an exploded view for explaining the structure of the mesh belt of the conventional example.

FIG. 13 is a diagram showing a problem of a comparative example.

[Explanation of symbols]

 2 Annular body 3 Belt conveyor 9 Belt 20 Conveying part 21 Bottom wall 22, 23 Side wall 24 Processing chamber 25 Furnace body 27 Heater 30 Chain (winding part) 40 Unit belt 41 Connecting material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Goda 1130 Nishihama, Wakayama City, Wakayama Prefecture (72) Inventor Shigetaro Kitao 3-1-34 Kamikita, Hirano-ku, Osaka City, Osaka Prefecture

Claims (5)

[Claims] 1. A hollow annular body, a belt conveyor having a belt through which gas can flow and which is driven to rotate in the annular body, and means for supplying gas to the conveying portion of the belt from the inside of the belt circulating track. A belt conveyer type processing apparatus in which a conveyor portion of the belt is arranged in a processing chamber formed in a furnace body formed by a part of the annular body. 2. The belt conveyor type processing apparatus according to claim 1, wherein a heating means is provided so as to surround the processing chamber. 3. The belt comprises a transport section having side walls rising from both ends of a bottom wall for placing an object to be transported, and a winding section wound around a drive member and driven to rotate.
The bottom wall of the conveying unit and the winding unit are mesh belts connected at a plurality of positions spaced in the circumferential direction, and the conveying unit is a plurality of unit belts arranged in parallel along the belt circumferential direction, A connecting member that connects adjacent unit belts, and each unit belt is formed of a wire member that follows the spiral around the belt width direction in the bottom wall and the spiral around the rising direction in the side wall. , Each connecting member is constituted by a wire along the belt width direction in the bottom wall and along the rising direction in the side wall, and the adjacent unit belt is provided in the gap between the spiral wire rods forming each unit belt. The spiral wire rods constituting the wire rods are positioned, and the wire rods constituting the respective connecting members are inserted into the space surrounded by the pair of spiral wire rods constituting the adjacent unit belts to be adjacent to each other. Units belt, the belt conveyor type processing apparatus according to claim 1 or claim 2 than a state of relatively most extended in the circumferential direction of the belt is in a state of being contracted in the bottom wall. 4. The diameter of the wire material constituting each connecting material is D ₁ ,
The diameter of the spiral wire rod that constitutes each unit belt is D ₂ , the pitch of the connecting members when the adjacent unit belts are relatively extended in the belt circumferential direction is Wmax, the average of the connecting members 41 on the bottom wall. When the pitch is W, the W is 2Wmax> 2W ≧ (Wmax + D 1 + 2D 2) belt conveyor type processing apparatus of claim 3 which is set so as to satisfy. 5. The connection interval between the bottom wall and the wrapping portion in the belt circumferential direction is L, the radius of curvature at the position where the wrapping portion has the largest curvature is r, the rising height of the side wall is H, and each connection is The diameter of the wire rod forming the member is D ₁ , the diameter of the spiral wire rod forming each unit belt is D ₂ , and the pitch of the connecting member in the state where the adjacent unit belts are relatively extended most in the belt circumferential direction. Wmax, Z = 2 [(r +
H) / L] × sin ⁻¹ (L / 2r), Y = 2Wmax /
The belt conveyor type processing apparatus according to claim 3 or 4, wherein Wmax is set so as to satisfy Y ≧ Z as (Wmax + D ₁ + 2D ₂ ).