JP4996760B1 - Batch type heat treatment furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a batch type heat treatment furnace capable of heat treatment at a stable temperature.
SOLUTION: A furnace body 10 having a box-shaped furnace body 11 and a heat treatment body 20 for performing heat treatment, and a moving table 20 in which a heat treatment product W is taken in and out of the furnace body 10 are configured. The moving table 20 is provided with an elevating device 40 and is moved up and down. The elevating platform 22 is provided directly above the cart 21 and moved up and down by the elevating device 40, and is erected from the rear portion of the elevating platform 22. A column 23 and a fork 24 extending forward from the column 23 are configured. The furnace body 10 is formed immediately below the furnace body 11, the space 12 into which the carriage 21 and the lifting platform 22 enter, and the rear part of the furnace body 11, and the fork 24 on which the heat treatment product W is placed can enter. An entrance / exit 13 having a size, a recess 14a that is provided inside the furnace main body 11 and into which the fork 24 enters, a base 14 on which the heat-treated product W is mounted, and a door 16 that opens and closes the entrance / exit 13 are provided. Consists of.
[Selection] Figure 2

Description

  The present invention relates to a batch-type heat treatment furnace provided with a moving table for carrying in and carrying out heat-treated products.

  This will be described with reference to FIGS. Conventionally, many batch-type heat treatment furnaces have been used (see, for example, Patent Document 1). In this batch type heat treatment furnace, there is a carriage type furnace 70 in which the heat treated material W is carried into the furnace body 71 together with the carriage 72 for heat treatment, and then the heat treatment article W is carried out together with the carriage 72 from the furnace body 71. Yes (see FIG. 8).

  There is also a tray type furnace 80 in which the heat-treated product W is carried into the furnace body 81 together with the transfer tray 83 placed on the roller conveyor 82, and after the heat treatment, the heat-treated product W is carried out from the furnace body 81 together with the transfer tray 83. (See FIG. 9).

JP 10-141859 A

  However, since the conventional cart furnace 70 carries the heat-treated material W together with the cart 72 into the furnace body 71, it is necessary to form a large opening 73 in the furnace body 71 so that the cart 72 can enter and exit. Therefore, since combustion gas easily leaks or outside air easily enters the furnace body 71, there is a problem that the temperature change of the furnace body 71 is severe, the quality of the heat-treated product W is deteriorated, and the working environment is deteriorated. Moreover, since the cart 72 also receives high heat in the furnace body 71 together with the heat-treated product W, there is a problem that it is easily damaged. Further, the carriage 72 is composed of refractory bricks and refractory castables having a large heat storage amount, and needs to be cooled outside the furnace after each heat treatment, so that heat loss is large. Furthermore, a vertical plate 76 suspended from the furnace body 71 is sandwiched between the carriage 72 and the furnace body 71 in the sand seal 74 in the groove member 75 suspended from the side surface of the carriage 72. There is also a problem that combustion gas tends to leak.

  In addition, since the conventional tray type furnace 80 carries the heat-treated product W into the furnace body 81 together with the transport tray 83, the furnace body 81 needs to be provided with a roller conveyor 82. The transport tray 83 and the roller conveyor 82 need to be formed of heat-resistant steel in order to cope with the high heat in the furnace body 81. Therefore, the manufacturing cost increases. Moreover, since it is easy to be damaged by the high heat in the furnace 81 and needs frequent replacement, the maintenance cost increases.

  Furthermore, since the transport tray 83 needs to move on the roller conveyor 82 with the heat-treated product W placed thereon, a structure having sufficient rigidity is required. Therefore, the manufacturing cost and the maintenance cost increase. Further, there is a risk that the heat-treated product W may fall from the roller conveyor 82 due to thermal distortion of the roller conveyor 82.

  The present invention has been devised in view of these problems, and it is possible to heat-treat the heat-treated product at a stable temperature, to improve the working environment, to have low manufacturing costs and maintenance costs, and to be durable. It is another object of the present invention to provide a batch-type heat treatment furnace excellent in safety.

  This will be described with reference to FIGS. The heat treatment furnace 1 according to claim 1 has a box-shaped furnace main body 11, a furnace body 10 that performs heat treatment on the heat treatment object W, and the heat treatment object W is carried into the furnace body 10, and the heat treatment Then, it is a batch type heat treatment furnace provided with a moving table 20 for carrying out the heat treated product W from the furnace body 10.

  And the said moving stand 20 is equipped with the raising / lowering apparatus 40 at least, The trolley | bogie 21 which moves to the front-back direction with the conveying apparatus 30, and the raising / lowering base | substrate 22 which is provided just above the said trolley | bogie 21 and moves up and down by the said raising / lowering apparatus 40, And a column 23 erected from the rear part of the elevating base 22 and a fork 24 composed of a plurality of horizontal members 24a extending in the horizontal direction forward from the column 23.

The furnace body 10 is formed at least directly below the furnace body 11, and is formed in the space 12 where the carriage 21 and the lift base 22 can enter, and at the rear of the furnace body 11, and the heat-treated product. the fork 24 and the entrance 13 of a size that can enter carrying the W, provided inside the reactor main body 11, with a recess 14a in which the the top fork 24 enters, on the top surface, the heat-treated product W is A gantry 14 to be mounted thereon and a door portion 16 that opens and closes the doorway 13 are provided.

  The heat treatment furnace 1 according to claim 2 has a box-shaped furnace body 11, a furnace body 10 that heat-treats the heat-treated product W, and the heat-treated product W is carried into the furnace body 10 and the heat treatment is performed. Then, it is a batch type heat treatment furnace provided with a moving table 20 for carrying out the heat treated product W from the furnace body 10.

  And the said moving stand 20 is equipped with the raising / lowering apparatus 40 at least, The trolley | bogie 21 which moves to the front-back direction with the conveying apparatus 30, and the raising / lowering base | substrate 22 which is provided just above the said trolley | bogie 21 and moves up and down by the said raising / lowering apparatus 40, And a column 23 erected from the rear part of the elevating base 22 and a fork 24 composed of a plurality of horizontal members 24a extending in the horizontal direction forward from the column 23.

The furnace body 10 is formed at least directly below the furnace body 11, and is formed in the space 12 where the carriage 21 and the lift base 22 can enter, and at the rear of the furnace body 11, and the heat-treated product. the fork 24 and the entrance 13 of a size that can enter carrying the W, provided inside the reactor main body 11, with a recess 14a in which the the top fork 24 enters, on the top surface, the heat-treated product W is A gantry 14 to be mounted thereon and a door portion 16 that opens and closes the doorway 13 are provided.

  The elevating device 40 is provided on the carriage 21, and includes a telescopic cylinder 41 provided with a rod 41a that horizontally moves in the front-rear direction, a swing arm 42 pivotally attached to the rod 41a, and a base end portion. The lifting / lowering link 43 is pivotally attached to the swing arm 42 and has a tip part pivotally attached to the lifting base 22.

  Since the batch type heat treatment furnace 1 according to claim 1 has the above-described configuration, the moving table 20 is moved forward by the transfer device 30 so that the heat-treated product W is moved together with the fork 24 from the entrance 13 to the inside of the furnace main body 11. After being carried in, the fork 24 can be lowered together with the elevating base 22 by the elevating device 40 so that the heat treatment product W can be placed on the upper surface of the gantry 14. Thereafter, the moving table 20 can be moved backward to close the door 16 of the furnace body 10 and heat treatment can be performed.

  Therefore, since the entrance / exit 13 provided in the furnace main body 11 does not need to pass the moving table 20 and the lift base 22, the opening area can be set small. As a result, leakage of combustion gas and entry of outside air can be suppressed, and the heating temperature of the furnace body 11 can be kept constant. As a result, the heat-treated product W after heating can be made high quality.

  Unlike the conventional cart furnace 70, the moving table 20 is not damaged by high heat because the moving table 20 is heat-treated while being retracted from the furnace body 11. Thereby, it is excellent in durability and can provide the cheap batch type heat processing furnace 1 of a manufacturing cost and a maintenance cost.

  Further, unlike the conventional tray furnace 80, since a roller conveyor is not used, the durability is excellent, the manufacturing cost and the maintenance cost are low, and the heat transfer of the roller conveyor becomes unstable and the heat treatment becomes unstable. There is no danger of the object W falling, and it is excellent in safety.

  The batch heat treatment furnace 1 according to claim 2 exhibits the same effect as that of the invention according to claim 1. In addition, since the lifting device 40 includes the telescopic cylinder 41, the swing arm 42, and the lifting link 43, the lifting base 22 can be moved up and down accurately and reliably. A small drive unit that moves the telescopic cylinder 41 can be stored in the column 23.

It is a top view which shows embodiment of the batch type heat processing furnace which concerns on this invention. In the heat treatment furnace shown in FIG. 1, it is a cross-sectional side view (cross-sectional view taken along the line XX in FIG. 2) showing a state in which a heat-treated product is carried in and out by a moving table. FIG. 2 is a side cross-sectional view showing a heated state of a heat-treated product in the heat treatment furnace shown in FIG. 1. It is a front view of the heat processing furnace shown in FIG. 1 (YY arrow line view of FIG. 1). It is a side surface enlarged view which shows the raising / lowering apparatus and guide mechanism in the heat processing shown in FIG. It is a side surface enlarged view which shows the interlocking mechanism in the heat processing furnace shown in FIG. FIG. 2 is a partially enlarged front sectional view showing the movement of the fork in the heat treatment furnace shown in FIG. 1 ((a) shows a state before the fork is lowered, and (b) shows a state after the fork is lowered). . (A) It is a side surface lineblock diagram showing the cart type furnace concerning a conventional example, and (b) is a QQ section arrow view figure of (a). It is a side block diagram which shows the tray type furnace which concerns on a prior art example.

  An embodiment of a batch heat treatment furnace according to the present invention is shown in FIGS. This heat treatment furnace 1 has a box-shaped furnace body 11, a furnace body 10 that heat-treats the heat-treated product W, and the heat-treated product W is carried into the furnace body 10, and after the heat treatment, And a moving table 20 for carrying out the heat-treated product W.

  Further, the movable table 20 is constituted by a carriage 21, a lifting base 22, a column 23, and a fork 24. The carriage 21 has a plurality of rollers 26 on its lower surface and is moved in the front-rear direction by the transport device 30.

  The transport device 30 is configured by a cable 34 being stretched between a drive reel 31 driven by a motor 32 and a driven reel 33. The cable 34 is engaged with the lower surface of the carriage 21, and the cable 34 is moved back and forth. The cart 21 is moved in the front-rear direction by moving in the direction. It goes without saying that the carriage 21 can be self-propelled by loading the conveying device 30 and the motor 32 on the carriage 21. Further, the carriage 21 includes a lifting device 40.

  The lifting base 22 is provided directly above the carriage 21 in parallel with the carriage 21 and is moved up and down by the lifting device 40. The lifting device 40 includes a telescopic cylinder 41 such as a hydraulic cylinder and an electric cylinder that tilts around a pin 42 b as a base, an oscillating arm 42, and a lifting link 43. In addition, this raising / lowering apparatus 40 is provided ranging over the trolley | bogie 21 and the raising / lowering base | substrate 22, and the specific installation location is not specifically limited. Moreover, the number of installation is not limited.

The telescopic cylinder 41 includes a piston rod 41a whose base end is pivotally supported on the carriage 21 by a pin 42b and horizontally moves in the front-rear direction. The oscillating arm 42 has a substantially U-shape, and a base end portion thereof is pivotally attached to a distal end portion of the rod 41a by a pivot P1. Lifting link 43 which is pivotally mounted on the lifting platform 22 the top end by pivot P is a plate provided in the vertical direction, are pivotally by pivot P at its lower end tip of the swing arm 42. An intermediate portion (uppermost portion) of the swing arm 42 is pivotally supported on the carriage 21 by the pivot P.

  The lifting device 40 includes an interlocking mechanism 45 attached thereto. The interlocking mechanism 45 is interlocked with the lifting device 40 (for example, the first pivot P1 of the lifting device 40 and the first pivot P1 of the interlocking mechanism 45 are the same axis, and are shifted in the axial direction of the first pivot P1 to move up and down. The telescopic cylinder 41 and the interlocking mechanism 45 are arranged with the frame of the base plate 22 interposed therebetween, and the swing arms 42 provided on the front and rear of the moving base 20 are connected via two shaft rods 47 and a turnbuckle 46. Yes. Thereby, the operation | movement of one expansion-contraction cylinder 41 can raise / lower the front part and rear part of the raising / lowering base | substrate 22 simultaneously. The interlocking mechanism 45 is also provided across the carriage 21 and the lift base 22, and the specific installation location and the number of installation are not particularly limited.

  In the present embodiment, a guide mechanism 60 is provided between the carriage 21 and the lift base 22 for moving the lift base 22 up and down in the vertical direction. The guide mechanism 60 includes a guide hole member 61 fixed to the carriage 21, and a sliding rod 62 whose upper end is pivotally attached to the lifting base 22 by a pivot P and whose lower portion is vertically inserted into the guide hole member 61. Composed. The guide mechanism 60 is also provided across the carriage 21 and the lift base 22 like the lift device 40, and the specific installation location and the number of installation are not particularly limited.

  The column 23 is erected in the vertical direction from the rear portion of the lifting base 22. The fork 24 is composed of a plurality (two in this embodiment) of horizontal members 24 a extending horizontally from the upper end of the column 23 to the front. The fork 24 is provided in parallel with the carriage 21 and the lift base 22 and has the same length as them.

In the batch type heat treatment furnace 1 of the present embodiment, the furnace body 10 is constituted by the furnace body 11, the space 12, the entrance 13, the gantry 14, and the door 16. The furnace body 11 is made of a heat-resistant material (such as a heat-resistant brick and a ceramic blanket) and has a substantially rectangular parallelepiped shape including an upper wall 11a, a lower wall 11b, and a peripheral wall 11c. An exhaust damper 15 is provided on the upper wall 11a.

The space 12 is formed immediately below the furnace body 11 (lower wall 11b), and has a height and a width that allow the movable table 20 and the lift base 22 to enter. The space 12 is formed by hanging a plurality of support columns 17 from the lower part of the furnace body 11.

  The entrance / exit 13 is formed in the rear part of the furnace body 11 (the peripheral wall 11c) and has a size (height and width) into which the fork 24 on which the heat-treated product W is placed can enter.

  The gantry 14 is provided inside the furnace main body 11, and has a concave portion 14 a large enough to allow the fork 24 to enter on the upper surface thereof. On the upper surface of the gantry 14, a heat treatment product W is placed. In the present embodiment, the heat treated material W is placed on the mounting tray 25 and placed on the fork 24 and the gantry 14.

  The door part 16 opens and closes the entrance / exit 13 formed in the furnace main body part 11, and is moved up and down by an opening / closing mechanism 50. The opening / closing mechanism 50 is provided in the furnace main body 11 and the structure thereof is not limited. For example, the opening / closing port 13 is opened by winding the wire 52 connected to the door 16 via the pulley 53 by the winch 51. Can be opened.

  The batch heat treatment apparatus according to the present embodiment operates as follows. First, the heat-treated product W is placed on the fork 24 of the movable table 20 together with the upper tray 25 by a crane or the like. In this state, the transfer device 30 is driven to move the moving table 20 forward, and the carriage 21 and the lift base 22 are caused to enter the space 12, and the heat-treated product W is moved from the entrance / exit 13 together with the fork 24 (and the mounting tray 25). insert. At this time, the door mechanism 16 is moved upward by driving the opening / closing mechanism 50 and the doorway 13 is opened.

  In a state where the heat-treated product W is sufficiently inserted from the entrance / exit 13 and the entirety thereof has reached the gantry 14 (that is, in a state where the front surface of the column 23 is close to the rear surface 11d of the furnace body 11), the transfer device 30 is moved. Stop.

  Next, the lifting device 40 is driven to lower the lifting base 22. The descending movement of the elevating base 22 is performed in the vertical direction by the action of the guide mechanism 60. As the elevating base 22 moves downward, the fork 24 enters the recess 14a of the gantry 14 and the heat-treated product W (and the mounting tray 25) is placed on the upper surface of the gantry 14 (see FIG. 7).

  Subsequently, after the moving table 20 is moved backward by driving the transfer device 30 and retracted from the furnace body 10, the door 16 is moved downward by driving the opening / closing mechanism 50, and the doorway 13 is closed. In this state, the heat-treated product W is heated for a certain time to perform heat treatment (see FIG. 3).

  After completion of the heat treatment, the door portion 16 is moved up to bring the doorway 13 into a released state, the moving base 20 is moved forward, the carriage 21 and the lift base 22 enter the space portion 12, and the fork 24 is moved into the doorway. 13 is inserted into the recess 14a. In this state, the elevating base 22 is moved upward to place the heat-treated product W (and the mounting tray 25) on the fork 24. The ascending / descending movement of the elevating base 22 is also performed along the vertical direction by the action of the guide mechanism 60.

  Subsequently, the moving table 20 is moved backward, retracted from the furnace body 10, the heat treated product W is lowered from the fork 24 with a crane or the like, and then a new heat treated product W is placed thereon, and the above steps are repeated to perform the heat treatment. Do.

  The batch-type heat treatment furnace 1 according to the present embodiment merely inserts a fork 24 on which a heat treatment product W (and an upper tray 25) is placed from an entrance 13 provided in the furnace body 11 of the furnace body 10. There is no need to allow the lift base 22 to enter the furnace body. Therefore, the opening area of the entrance / exit 13 can be set small. Thereby, leakage of combustion gas and ingress of outside air can be suppressed, and the heating temperature of the furnace body 11 can be easily kept constant.

  That is, heat efficiency is good because there is little heat loss when the heat-treated product W is carried into the furnace body 10, so that energy saving can be achieved and the temperature raising time can be shortened. As a result, the heat-treated product W after the heat treatment can be made high quality.

  Moreover, since the heat treatment is performed in a state where the moving table 20 is retracted from the furnace main body 11, the moving table 20 is not damaged by high heat. Further, it is not necessary to provide a roller conveyor or the like inside the furnace body 11. Therefore, the structure of the furnace body 10 and the moving table 20 can be simplified, and the batch-type heat treatment furnace 1 that is excellent in durability and inexpensive in terms of manufacturing cost and maintenance cost can be provided.

  Furthermore, since the heat-treated product W is mounted on the gantry 14, the heat-treated product W does not fall as in the case of moving on the roller conveyor, and the safety is excellent.

  Moreover, since the raising / lowering apparatus 40 is comprised with the expansion-contraction cylinder 41, the rocking | swiveling arm 42, and the raising / lowering link 43, the raising / lowering base | substrate 22 can be raised / lowered correctly and reliably.

  The heat treatment furnace 1 according to the present invention can be used as any furnace. For example, an annealing furnace, a normalizing furnace, a heating furnace, a quenching furnace, a tempering furnace, a stainless solution furnace, and the like.

DESCRIPTION OF SYMBOLS 1 Batch type heat treatment furnace 10 Furnace body 11 Furnace body part 11a Upper wall 11b Lower wall 11c Peripheral wall 11d Rear surface 12 Space part 13 Entrance / exit 14 Mount 14a Recess 15 Exhaust damper 16 Door part 17 Strut 20 Moving base 21 Carriage 22 Lifting base 23 Column 24 fork 24a horizontal member 25 loading tray 26 roller 30 transport device 31 driving reel 32 motor 33 driven reel 34 cable 40 lifting device 41 telescopic cylinder 41a rod 42 swing arm 42b pin 43 lifting link 45 interlocking mechanism 46 turnbuckle 47 shaft rod 50 Opening and closing mechanism 51 Winch 52 Wire 53 Pulley 60 Guide mechanism 61 Guide hole member 62 Sliding rod 70 Carriage furnace 71 Furnace body 72 Carriage 73 Opening part 74 Sand seal 75 Groove-shaped material 76 Vertical plate 80 Tray furnace 81 Furnace body 82 Roller conveyor 83 Conveying tray P Pivot P1 First pivot W Heat treatment

Claims (2)

A furnace body (10) having a box-shaped furnace body (11) for heat-treating the heat-treated product (W), and carrying the heat-treated product into the furnace body, and after the heat treatment, from the furnace body, A batch-type heat treatment furnace comprising a moving table (20) for carrying out the heat-treated product,
The moving table is at least,
A carriage (21) provided with an elevating device (40) and moved in the front-rear direction by a conveying device (30);
An elevating base (22) provided directly above the carriage and elevating and lowering by the elevating device;
A column (23) erected from the rear of the lifting base;
A fork (24) composed of a plurality of horizontal members (24a) extending in a horizontal direction forward from the column,
The furnace body is at least,
A space (12) formed directly under the furnace body and into which the carriage and the lift base can enter;
An inlet / outlet (13) formed at a rear portion of the furnace main body and having a size into which the fork loaded with the heat-treated material can enter;
Provided inside of the furnace main body, with a recess (14a), wherein the upper surface fork enters, the upper surface, a gantry (14) to the heat-treated material is placing above,
A batch-type heat treatment furnace comprising: a door portion (16) for opening and closing the entrance / exit. A furnace body (10) having a box-shaped furnace body (11) for heat-treating the heat-treated product (W), and carrying the heat-treated product into the furnace body, and after the heat treatment, from the furnace body, A batch-type heat treatment furnace comprising a moving table (20) for carrying out the heat-treated product,
The moving table is at least,
A carriage (20) provided with an elevating device (40) and moved in the front-rear direction by a conveying device (30);
An elevating base (22) provided directly above the carriage and elevating and lowering by the elevating device;
A column (23) erected from the rear of the lifting base;
A fork (24) composed of a plurality of horizontal members (24a) extending in a horizontal direction forward from the column,
The furnace body is at least,
A space (12) formed directly under the furnace body and into which the carriage and the lift base can enter;
An inlet / outlet (13) formed at a rear portion of the furnace main body and having a size into which the fork loaded with the heat-treated material can enter;
Provided inside of the furnace main body, with a recess (14a), wherein the upper surface fork enters, the upper surface, a gantry (14) to the heat-treated material is placing above,
A door part (16) for opening and closing the doorway,
The lifting device is
A telescopic cylinder (41) provided on the carriage and provided with a rod (41a) horizontally moving in the front-rear direction;
A generally oscillating arm (42) pivotally attached to the rod;
A batch type heat treatment furnace comprising: a lifting link (43) having a base end portion pivotally attached to the swing arm and a distal end portion pivotally attached to the lifting base .

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