JPH03249120A - Heat treating furnace for steel products - Google Patents

Abstract

PURPOSE:To reduce a floor space by forming a treating chamber for making heat treatment to a vertical type and providing an endless steel product transporting member which is intermittently moved via a charging port and ejecting port across the treating chamber and an preparing chamber at the exterior and lower side thereof. CONSTITUTION:The treating chamber 22 which is enclosed by heat insulating materials 21 supported to a frame body 11 and is internally provided with plural heating sources 41 is formed to the vertical shape and the exterior and lower side of the treating chamber 22 is formed as the preparing chamber 52 enclosed by heat insulating walls 51. Upper and lower sprockets 61, 62 are respectively provided in the treating chamber 22 and the preparing chamber 52 and the endless transporting member 71 mounted with receivers 81 opened only at the end faces on one side at prescribed intervals is engaged between this chamber and the preparing chamber 52 via the charging port 31 and the ejecting port 32. For example, the sprocket 61 is driven intermittently in an arrow direction to intermittently move the plural receivers 81 via the transporting member 71. Steel products A are pushed and housed into the receivers 81 from the inlet 33 while the receivers are held stopped. The steel products A are then charged to the treating chamber 22 of the atmosphere of the temp. higher than the temp. thereof and are heated to a prescribed temp. during transportation; thereafter, the steel products A are taken out of the port 34.

Description

[Detailed description of the invention] Industrial application fields> The present invention relates to a heat treatment furnace for steel materials.

When tempering, annealing, etc. are performed to impart hardness, toughness, mechanical properties, etc. to a steel material, a heat treatment furnace is used to heat the steel material in a treatment chamber with an atmosphere at a temperature higher than the temperature of the charged product. .

The present invention relates to a heat treatment furnace used in tempering, annealing, etc., to heat steel materials in a treatment chamber with an atmosphere at a temperature higher than the temperature of the charged product, and particularly relates to a heat treatment furnace in which the treatment chamber is formed in a vertical shape. It is.

<Prior Art> Conventionally, the Roller/X-7 type heat treatment furnace has been used as a heat treatment furnace used in tempering, annealing, etc., to heat steel materials in a processing chamber with an atmosphere at a temperature higher than the temperature of the charged product.

There are various types such as walking beam type, cast link type, mesh belt type, etc. All of these are
A processing chamber surrounded by a heat insulating material and equipped with a heating source and a fan is formed horizontally, and within the processing chamber, steel materials are transported, for example, from the left side, using conveying means such as rollers, walking beams, cast links, mesh belts, etc. It is heated while being conveyed flatly from the beginning to the right.

<Problems to be Solved by the Invention> However, the conventional heat treatment furnaces as described above have a problem that the installation space is large because the processing chambers are formed horizontally.

The present invention solves this problem.

Means for Solving the Problems> The present invention provides a heat treatment furnace for heating steel materials in a treatment chamber with an atmosphere at a temperature higher than the temperature of the charged product, the furnace being surrounded by a heat insulating material having a charging inlet and an unloading outlet. In addition, a processing chamber in which a heating source is installed is formed in a vertical shape, and a preparation chamber surrounded by a heat-insulating wall having an inlet and an outlet is formed at the outer lower part of the processing chamber. An endless conveying member to which a plurality of receivers for storing steel materials are attached is engaged between the upper sprocket and the lower sprocket installed in the preparation chamber. By intermittent driving, the entire receiver is intermittently moved in an elliptical shape via the conveying member to sequentially load from the preparation chamber to the processing chamber, and at the same time sequentially load from the processing chamber to the preparation chamber. This relates to a heat treatment furnace for steel materials whose main feature is to be constructed so as to produce heat.

In the present invention, the processing chamber is formed in a vertical shape, and a preparation chamber is formed at the outer lower part of the processing chamber. The processing chamber is equipped with an upper sprocket, and the preparation chamber is equipped with a lower tin rocket, and an endless conveying member is engaged between the upper and lower sprockets, and the conveying member A plurality of receivers are installed to store steel materials. Therefore, the conveyance member and the receiver straddle the processing chamber and the preparation chamber via the loading and unloading ports provided in the heat insulating material surrounding the processing chamber.

Effects> In the present invention having the above configuration, when one of the upper and lower sprockets is intermittently driven, the plurality of receivers are intermittently moved via the conveying member. Such intermittent movement of multiple receivers is as follows: loading from the preparation chamber to the processing chamber → rising in the processing chamber → turning along the upper sprocket in the processing chamber → descending in the processing chamber → loading from the processing chamber to the preparation chamber → Descending in the preparation room → Turning along the lower sprocket in the preparation room → Ascent in the preparation room → Charging from the preparation room to the processing chamber in the original state, the above process is repeated, and the whole process is shaped like an oblong in the vertical direction. Intermittent movement. Therefore, during the rising stage in the preparation room, while the sprocket is stopped, if the steel material is stored into the corresponding receiver from the inlet opened in the insulation wall, the steel material will be inserted into the insulation material along with the receiver. After being charged into the processing chamber through the charging port and heated during the rising, rotating and descending stages of the receiver in the processing chamber, the container is charged into the preparation chamber through the charging port provided in the heat insulating material. During the lowering or pivoting stage of the receiver in the chamber, it is removed, for example mechanically or by its own weight, through an outlet provided in the insulation wall.

According to the present invention, since the processing chamber is formed in a vertical shape,
Installation space can be reduced. In addition, if the processing chamber has a relatively small capacity, a stirring effect can be obtained by intermittent lifting, rotation, and lowering of multiple receivers containing steel materials, so it is not necessary to install a fan in the processing chamber. This makes it possible to eliminate wasted space in the processing chamber. In this case, by sloping or curving the shoulder portion of the processing chamber downward, it is possible to further eliminate wasted space in the processing chamber and improve the temperature distribution in the processing chamber. In either case, if the upper sprocket is a driving sprocket and the lower sprocket is an idler sprocket supported by the driving sprocket via a conveying member, the thermal expansion of these can be absorbed, making the process smoother. Moreover, safe driving can be achieved.

<Embodiment> FIG. 1 is a side view schematically showing an embodiment of the present invention, partially in section. A processing chamber 22 is formed in a regular shape by being surrounded by a heat insulating material 21 supported by a frame 11. A charging port 31 and an unloading port 32 are opened at the bottom of the heat insulating material 21. A plurality of heat sources 41 and fans 42 are installed inside. A preparation chamber 52 is formed at the outer lower part of the processing chamber 22 and surrounded by a heat retaining wall 51 supported by the frame 11.
There is an inlet 33 on the side of the heat retaining wall 51, and an outlet 3 on the bottom.
4 have been established. The processing chamber 22 is equipped with an upper sprocket 61, and the preparation chamber 52 is equipped with a lower sprocket 62. In the drawing, the upper sprocket 61 serves as a driving sprocket, and the lower sprocket 62 is a floating sprocket. Upper and lower sprockets 61 supported by the frame 11.
62, an endless conveying member 71 is engaged between the two, and the conveying member 71 has a plurality of receivers 81 with only one side end surface open.
are installed at predetermined intervals. The conveyance member 71 and the plurality of receivers 81 are connected to the processing chamber 2 through the loading port 31 and the loading port 32.
2 and the preparation room 52.

When the upper sprocket 61 is driven intermittently, the plurality of receivers 81 are intermittently moved via the conveying member 71. Such intermittent movement of the plurality of receivers 81 is as described above. During the rising phase of the receiver 81 in the preparation room 52, while the subrogate 61, 62 is stopped, the receiver 81 therefore
1 is stopped, the opening/closing door 35 is opened and the steel material A placed on the charging table 91 is pushed into the receiver 81 from the entrance 33 and stored. It is charged into the processing chamber 22 from the inlet 31. The processing chamber 22 has an atmosphere that is higher than the temperature of the steel material A to be charged due to the plurality of heat sources 41, and therefore the steel material A is
2, the receiver 81 is heated to a predetermined temperature during the rising, rotating, and lowering steps. Then, the steel material A is discharged from the loading port 32 to the preparation room 52 together with the receiver 81, and when the receiver 81 rotates in the preparation room 52, it falls from the outlet 34 to the packet 92 due to its own weight. Exit 34
An opening/closing door 36 made of a heat insulating material is attached to the opening/closing door 36. The opening/closing door 36 is closed to keep the preparation chamber 52 in an airtight state while heating the processing chamber 22 at the start of operation. It is open during operation.

FIG. 2 is a side view of essential parts schematically showing another embodiment of the present invention, partially in section. Other structures, such as a plurality of heating elements 1143, an upper sprocket 63, a conveyance member 72, a plurality of receivers 82, etc., whose explanation is omitted, are the same as in the case of FIG. In this embodiment, the top of the supported insulation 23 is semicircular in cross-section, so that the shoulder of the processing chamber 24 is curved downward, and the processing chamber 24 is not equipped with an internal fan. Since it is possible to eliminate wasted space in the processing chamber 24 and also to improve the temperature distribution, it is particularly suitable for a relatively small heat treatment furnace.

The configuration of the present invention has been explained above based on the illustrated embodiments, but in each embodiment, for example, various heaters, burners, etc. can be used as the heating source, and the conveying member can be engaged with the upper and lower sprockets. A chain can be used, and multiple receivers can be screwed together with bolts and nuts through reinforcing members if necessary on the links of the chain, and a conveyor can be used instead of a packet. can do.

<Effects of the Invention> As is already clear, the present invention described above has the advantage that the installation space can be reduced, and it is particularly suitable for a relatively small heat treatment furnace.

[Brief explanation of drawings]

FIG. 1 is a side view schematically showing an embodiment of the present invention, partially in section, and FIG. 2 is a side view schematically showing a principal part of another embodiment of the present invention, partially in section. 11.12...Frame, 21.23...Insulating material 2
2.24...Processing chamber 31...Charging port, 32...Charging port 33...
Inlet, 34...Outlet 41.43...Heating source, 42...Fan 51.
...heat insulation wall, 52...preparation room fil, 62.83
... Sprocket 71.72 ... Conveyance member, 8
1.82... Receiver A... Steel material

Claims (1)

[Scope of Claims] 1. A heat treatment furnace for heating steel materials in a treatment chamber with an atmosphere at a temperature higher than the temperature of the charged product, which is surrounded by a heat insulating material having a charging inlet and an unloading outlet, and has a heating source installed inside. The processing chamber is formed in a vertical shape, and a preparation chamber surrounded by a heat insulating wall having an inlet and an outlet is formed at the outer lower part of the processing chamber, and an upper sprocket installed in the processing chamber and a preparation chamber are formed at the outer lower part of the processing chamber. An endless conveyor member equipped with a plurality of receivers for storing steel materials is engaged between the lower sprocket installed in the preparation chamber,
By intermittently driving one of the sprockets, the entire receiver is intermittently moved in an elliptical shape via the conveying member, and is sequentially loaded from the preparation chamber to the processing chamber, and at the same time from the processing chamber. A heat treatment furnace for steel materials configured to be sequentially loaded into the preparation chamber. 2. The steel heat treatment furnace according to claim 1, wherein the upper sprocket is a driving sprocket, and the lower sprocket is a floating sprocket supported by the driving sprocket via a conveying member. 3. The steel heat treatment furnace according to claim 1 or 2, wherein the treatment chamber is equipped with a fan. 4. A heat treatment furnace for steel materials according to claim 1, 2 or 3, wherein the treatment chamber has a shoulder portion that is sloped or curved downward.