JP3116334B2 - Heat treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment apparatus. Various heat treatment apparatuses are used to heat or cool a material to be processed such as a metal material or a ceramic material with a heating gas or a cooling gas such as air or nitrogen gas. The present invention relates to an improvement of such a heat treatment apparatus.

[0002]

2. Description of the Related Art Conventionally, an air supply duct is connected to one side of a processing chamber and an exhaust air duct is connected to the other side of the heat treatment apparatus for a material to be processed as described above. A fan having a fan interposed in either one of them is used. This conventional apparatus heats or cools a material to be processed housed in a processing chamber by rotating a fan to flow a heating gas or a cooling gas through a path of an air supply duct → a processing chamber → a material to be processed → an exhaust duct. That is.
However, this conventional apparatus has a fundamental drawback that the material to be processed cannot be uniformly heated or cooled because the heating gas or the cooling gas flows into the processing chamber from only one direction.

Conventionally, as a heat treatment apparatus for a material to be treated as described above, two systems of supply / exhaust ducts are connected to a processing chamber, and a switching damper is mounted on each of the two systems of supply / exhaust ducts. A fan is used in which a fan is interposed in a collection portion of the two supply / exhaust ducts. In this conventional apparatus, the material to be treated housed in the processing chamber is rotated by a fan and the switching damper is opened and closed, so that one supply / exhaust duct → the processing chamber → the material to be treated → the other supply / exhaust duct. A heating gas or a cooling gas flows through the path, and a heating gas or a cooling gas flows through the path of the other supply / exhaust duct → the processing chamber → the material to be processed → one supply / exhaust duct to heat or cool. However, in this conventional apparatus, since the heating gas or the cooling gas flows from the reversible two directions to the processing chamber, compared with the conventional apparatus in which the heating gas or the cooling gas flows only from one direction, the material to be processed is reduced. While there is an advantage that uniform heating or uniform cooling can be performed, there are drawbacks in that the apparatus is complicated and large in size and uneconomical.

[0004]

The problem to be solved by the present invention is that the conventional apparatus cannot uniformly heat or cool the material to be processed, or the apparatus becomes complicated and large, and is uneconomical. It is.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a switching damper, an air supply duct and an exhaust duct connected to the switching damper in a straight line, and an air supply duct. A first air supply / exhaust duct and a second air supply / exhaust duct connected to each other on a straight line perpendicular to the air duct and the air exhaust duct, and one of the air supply duct and the air exhaust duct; And the first fan
A processing chamber having one side connected to the air supply / exhaust duct and the other side connected to the second air supply / exhaust duct, wherein the switching operation of the switching damper causes the heating gas or the cooling gas to be supplied to the air supply duct, the switching damper, the first Flow through the supply / exhaust duct, processing chamber, second supply / exhaust duct, switching damper, and exhaust duct. Also, supply duct, switching damper, second supply / exhaust duct, processing chamber, first supply / exhaust duct, switching damper, and exhaust. The present invention relates to a heat treatment apparatus characterized by being made to flow in a duct path.

A heat treatment apparatus according to the present invention includes a switching damper, an air supply duct and an exhaust duct, a first air supply / exhaust duct, a second air supply / exhaust duct, a fan, and a processing chamber. The supply duct and the exhaust duct are connected to the switching damper in a straight line. First supply / exhaust duct and second
The supply / exhaust duct is connected to the switching damper on the same plane as the supply duct and the exhaust duct on a straight line orthogonal to these. A fan is provided in one of the air supply duct and the exhaust duct. The processing chamber has one side connected to the first supply / exhaust duct and the other side connected to the second supply / exhaust duct.

[0007]

In the same plane, the straight supply and exhaust ducts and the other straight supply and exhaust ducts and the second supply and exhaust duct are orthogonal to each other, and the common part is switched to the orthogonal part. A damper is interposed, and the switching operation by turning the switching damper causes the air supply duct to communicate with the first air supply / exhaust duct and the air exhaust duct to communicate with the second air supply / exhaust duct,
Further, the air supply duct and the second air supply / exhaust duct are communicated, and the air exhaust duct and the first air supply / exhaust duct are communicated. Swivel the switching damper so that the air supply duct and the first
When the air supply / exhaust duct is communicated and the exhaust duct and the second air supply / exhaust duct are communicated, and the fan is rotated in this state, the heating gas or the cooling gas is supplied from the air supply duct → the switching damper → the first air supply. The air flows in the route of the exhaust duct → the processing chamber → the second supply / exhaust duct → the switching damper → the exhaust duct. When the switching damper is turned by 90 degrees, the air supply duct and the second air supply / exhaust duct are connected to each other, and the air exhaust duct and the first air supply / exhaust duct are connected to each other. The gas or the cooling gas flows through a path of an air supply duct → a switching damper → a second air supply / exhaust duct → a processing chamber → a first air supply / exhaust duct → a switching damper → an exhaust duct.

Therefore, according to the present invention, since the heating gas or the cooling gas can flow through the processing chamber from two reversible directions, the material to be processed housed in the processing chamber can be uniformly heated or uniformly cooled. In addition, since this can be realized only by rotating one fan at a constant speed and switching one switching damper, the apparatus can be simplified and downsized, which is economical.

In the present invention, when the supply side of the supply duct and the exhaust side of the exhaust duct are connected via a heater or a cooler, the heating gas or the cooling gas can be circulated and reused. Further, as a switching damper, a plurality of guide plates are juxtaposed at a predetermined interval between two support plates, of which a central guide plate has a flat shape, and an upper half guide plate has both sides thereof. The guide plate of the lower half is curved upward, and both sides thereof are curved downward, respectively.
If both edges of these guide plates are formed so as to be located on the same cylindrical peripheral surface as a whole, the heating gas or the cooling gas is primarily rectified by these guide plates, so that the material to be processed is More uniform heating or uniform cooling can be achieved.

[0010]

FIG. 1 is a plan view (partially sectional view) schematically showing an embodiment of the present invention, FIG. 2 is an enlarged front view schematically showing a switching damper of FIG. 1, and FIG. It is a B sectional view. The illustrated heat treatment apparatus includes a switching damper 51, an air supply duct 41 and an air exhaust duct 42, a first air supply / exhaust duct 31 and a second air supply / exhaust duct 32, a fan 61, a processing chamber 11, flow straightening plates 21 and 22. , A bypass duct, and a cooler 71. The supply duct 41 and the exhaust duct 42 are connected to the switching damper 51 in a straight line. The first supply / exhaust duct 31 and the second supply / exhaust duct 32 are connected to the switching damper 51 on the same plane as the supply duct 41 and the exhaust duct 42 on a straight line orthogonal to these. The fan 61 is provided in the air supply duct 41.
The processing chamber 11 has one side connected to the first supply / exhaust duct 31 and the other side connected to the second supply / exhaust duct 32. The current plate 21 includes the first air supply / exhaust duct 31 and the processing chamber 1.
The current plate 22 is interposed at the connection between the second supply / exhaust duct 32 and the processing chamber 11. The bypass duct extends between the air supply side of the air supply duct 41 and the exhaust side of the air exhaust duct 42, and is connected to the cooler 7.
1 is provided in this bypass duct.

On the same plane, a straight air supply duct 41
And the first supply / exhaust duct 31 and the second supply / exhaust duct 32 on another straight line are orthogonal to each other, and a switching damper 51 common to them is interposed in the orthogonal portion. The air supply duct 41 communicates with the first air supply / exhaust duct 31 while the air supply duct 41 communicates with the second air supply / exhaust duct 32, and the air supply duct 41 communicates with the second air supply / exhaust duct 32. And the exhaust duct 42 and the first supply / exhaust duct 31 are communicated.

The switching damper 51 is configured as follows. That is, a plurality of guide plates 91 to 97 are juxtaposed at a predetermined interval between two support plates 81 and 82 each having an arcuate surface protruding outward, and a central guide plate which also serves as a partition plate among them. 91 is flat and the upper half guide plate 92 ~
94 has both sides curved upward, and the lower half guide plates 95 to 97 have both sides curved downward, and both edges of these guide plates 91 to 97 are curved. It is formed so as to be located on the same cylindrical side peripheral surface that connects the circumferential end of the support plate 81 and the circumferential end of the support plate 82.

In FIG. 1, the switching damper 51 is turned so that both edges of the guide plate 91 are connected to the air supply duct 41 and the second air supply / exhaust duct 3.
2 and the exhaust duct 42 and the first supply / exhaust duct 3
1 shows a state in which the cooling gas is connected to the connection portion with the cooling gas 71 in the bypass duct as shown by a solid line arrow → the air supply duct 41 → the switching damper 51 → the first cooling gas.
Air supply / exhaust duct 31 → rectifying plate 21 → processing chamber 11 (processing chamber 1
1) → rectifier plate 22 → second supply / exhaust duct 32 → switching damper 51 → exhaust duct 42 → cooler 71 of bypass duct. In FIG. 1, when the switching damper 51 is turned by 90 degrees in the left rotation,
Both edges of the guide plate 91 are joined to a junction between the air supply duct 41 and the first air supply / exhaust duct 31 and a junction between the air exhaust duct 42 and the second air supply / exhaust duct 32. In this case, the cooling gas is supplied to the bypass duct. Cooler 71 → air supply duct 41 → switching damper 51 → second air supply / exhaust duct 32 → straightening plate 22 → processing chamber 11
(Processed material A stored in processing chamber 11) → Rectifying plate 21 →
First supply / exhaust duct 31 → switching damper 51 → exhaust duct 4
2 → Circulates in the path of the cooler 71 of the bypass duct.

[0014]

As is clear from the above, the present invention described above can uniformly heat or cool the material to be processed, and can simplify and reduce the size of the apparatus to make it economical. effective.

[Brief description of the drawings]

FIG. 1 is a plan view (partially sectional view) schematically showing an embodiment of the present invention.

FIG. 2 is an enlarged front view schematically showing the switching damper of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

11: processing chamber, 31: first supply / exhaust duct, 32
... Second air supply / exhaust duct, 41 ... Air supply duct, 42
... Exhaust duct, 51 ... Switching damper, 61 ...
Fan, 71 ... cooler, 81, 82 ... support plate,
91-97 ・ ・ ・ Guideboard

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F27D 7/04 F23L 13/00 F24F 5/00 F24F 13/02 F24F 13/10 F25D 17/08 301 F27D 9 / 00 G01N 25/00

Claims (3)

(57) [Claims] 1. A switching damper, an air supply duct and an exhaust duct connected to the switching damper in a straight line and opposed to each other, and the switching damper and the air supply duct and the exhaust duct on the same plane. First connected oppositely on an orthogonal straight line
A supply / exhaust duct and a second supply / exhaust duct, and a fan mounted on one of the supply duct and the exhaust duct;
A processing chamber having one side connected to the first air supply / exhaust duct and the other side connected to the second air supply / exhaust duct, wherein a switching operation of the switching damper supplies a heating gas or a cooling gas to the air supply duct, the switching damper, , First supply / exhaust duct, processing chamber, second
Flow through the supply / exhaust duct, the switching damper and the exhaust duct, and the supply duct, the switching damper, the second supply / exhaust duct,
A heat treatment apparatus characterized in that the heat treatment apparatus is configured to flow through a path of a processing chamber, a first supply / exhaust duct, a switching damper, and an exhaust duct. 2. The heat treatment apparatus according to claim 1, wherein the air supply side of the air supply duct and the exhaust side of the exhaust duct are connected via a heater or a cooler. 3. A switching damper, in which a plurality of guide plates are arranged in parallel at a predetermined interval between two support plates, of which a central guide plate is flat and an upper half guide plate is Both sides of the guide plate are curved upward, and the lower half of the guide plate has both sides curved downward, and both edges of these guide plates are entirely on the same cylindrical side peripheral surface. The heat treatment apparatus according to claim 1, wherein the heat treatment apparatus is formed so as to be positioned.