JPS5831364B2 - Processing material conveyance device for heat treatment furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing material conveying device for a heat treatment furnace, and in particular, a plurality of chain conveyors arranged in parallel in the width direction of the furnace are divided into two sets to transport the processing material. An elevating means is provided, and a phase difference is given to the elevating and lowering movements of these two elevating means, so that the workpieces to be processed are alternately received from one set of chain conveyor groups to the other set of chain conveyor groups by operation of the elevating means. By configuring the material to be conveyed on a chain conveyor while being passed, both the upper and lower surfaces of the material to be processed can be heated uniformly.
Since the conveyance is carried out by a chain conveyor, the conveyance speed can be changed continuously and easily, and the transfer between conveyance means such as roller conveyors before and after the heat treatment furnace can be carried out smoothly without damaging the treated materials. The present invention relates to a processing material transporting device for a heat treatment furnace that can reduce heat loss by only raising and lowering a chain conveyor for transporting processing material using a lifting means, so that the openings in the furnace wall are small.

Conventionally, a roller conveyor device has been used to transport the material to be treated in a heat treatment furnace. The production of the rollers is troublesome, complicated, and high in cost, and when the material is wide, a long roller is required, and not only the production but also the supporting means are complicated, and an extremely large number of rollers are required. Since a hole is drilled in the furnace wall for support, there is a large heat loss in the furnace wall.
There are problems such as poor thermal energy efficiency.

In addition, a chain conveyor similar to a belt conveyor is used as a conveying means in the furnace instead of the roller conveyor described above.
Since the chain conveyor conveys the material to be processed in a continuous endless strip, only the top surface of the material in the furnace is heated, and the bottom surface is covered by the strip, making it difficult to uniformly heat the material. There is a point.

Therefore, a walking beam device has been proposed as a means for transporting materials to be treated in a heat treatment furnace.

This is achieved by arranging multiple beams in parallel, making each beam perform a combined movement of vertical movement and back-and-forth movement, and synchronizing the height levels of adjacent sets of beams. The receiver for the material to be processed is used to transfer and send the material.

According to this, the structure of the conveying device is simple, there is little heat loss in the furnace wall, the driving device is simple, and the furnace width is not restricted due to manufacturing constraints of the roller conveyor, making it an extremely advantageous device. It is.

However, despite the advantages mentioned above, roller conveyors are generally used as means of conveying the material inside and outside the furnace. It is difficult to match the feed speed, and if the transfer is not smooth, scratches etc. will occur on the surface of the processed material, impairing the product quality. In this case, the conveying means before and after the heat treatment furnace and the conveying means inside the furnace are completely different, so it is extremely difficult to adjust the feed rate according to work or other circumstances.

In other words, it is difficult to adjust the feed rate in consideration of the entire line to be processed in the furnace due to delays in the pre-process and post-process.

The inventor of the present invention has developed the present invention in view of various problems associated with various conveying devices in conventional heat treatment furnaces, and to effectively solve these problems.

The object of the present invention is to divide a plurality of chain conveyors arranged in parallel in the oven width direction into two groups, provide lifting means for each group's chain conveyors, and provide a phase difference between these lifting means to raise and lower the chain conveyors of each group. By raising and lowering each of the chain conveyors, the material to be processed is transferred from one chain conveyor group to the other chain conveyor group alternately, and the material to be processed is conveyed by the forward conveyance movement of the chain conveyor and rollers.
The material to be treated can be properly heated during conveyance, allowing rational heat treatment to be carried out, and it also ensures smooth and reliable matching of the material to be carried into the furnace and with the conveyor for taking it out, and the conveyance speed can be adjusted. It is an object of the present invention to provide a processing material conveyance device for a heat treatment furnace, which is possible in relation to the entire line and is extremely advantageous in terms of heat treatment, such as the opening area of the furnace wall being small and heat loss being small.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a side sectional view schematically showing a heat treatment furnace according to the present invention.

The heat treatment furnace 1 is formed long from front to back, and there are material inlets 2 at the front and back.
and an outlet 3, and heating burners 4 are disposed above and below the left and right side walls in the furnace chamber S of the furnace 1.

Roller conveyors 5 and 6 are provided before and after the furnace 1, respectively, for controlling the loading and unloading of materials to be treated into the furnace 1.
One is continuous with the pre-process of the material to be treated, and the other is continuous with the post-process such as quenching of the material to be treated.

A Cheno conveyor device 7 is disposed in the front-rear direction in the furnace chamber S, that is, in the conveyance direction of the material to be processed such as a steel plate, with its end and start ends aligned with the end and start ends of the roller conveyors 5 and 6, and in the illustrated example, the Cheno conveyor device 7 is arranged. is divided into front and rear conveyor devices 7a and 7b in the center of the furnace chamber S, and the devices 7a and 7b adjacent to each other in the furnace width direction overlap in the width direction of the furnace chamber S at their respective terminal ends and starting ends. .

It goes without saying that there may be cases where partitioning is not required.

The front and rear conveyor devices 7a and 7b are a plurality of chain conveyors 8 arranged in parallel in the width direction of the furnace chamber S as shown in FIG.
Each conveyor 8... consists of group A alternately.

B, and the adjacent conveyors 8A and 8B belong to different braids.

Conveyors 8A and 8B systemized for each braided yarn are connected to each base 9A of vertically installed support rods 9.

9B... each line 12A of the pedestal 12 of a different system.

12B.

The lower truck 12 is connected to a lifting cylinder device 16 that raises and lowers it up and down, and the cylinder devices 16 are driven separately for each system A and B, and the chain conveyor 8A,
Each group of 8B is moved up and down integrally, and the drive shaft sprocket of the conveyor always rotates in the same direction in the direction of the arrow in FIG. 1, and the conveyor moves forward in the same direction.

Then, the vertical movement of the chain conveyor for each system is performed with the phase shifted for each adjacent set, and when the height level of each chain conveyor system A and B that performs the phase-shifted movement is synchronized, the height level of the chain conveyor to be processed is The receiver is configured to carry out the delivery.

The supporting portion of the chain conveyor 8 by the support rod 9 is provided at the front and rear sprocket portions on which the chain 7 is stretched in an endless manner.

Details of this will be explained with reference to FIGS. 3 to 5.

Fig. 3 is an enlarged side view of the sprocket portion of the chain conveyor 8, Fig. 4 is an enlarged sectional view of the section taken along the line TV-IV in Fig. 1, and Fig. 5 is an enlarged sectional view of the section taken along the line ■-■ in Fig. 1. are shown respectively.

Cheno conveyor 8 has sprocket wheels 1 at both front and rear ends.
The sprocket wheel 17 is supported by a shaft 18 and is configured to sandwich a member 19 containing a cooling medium therein.

Pawls 21 having rollers 20 are radially provided on the outer periphery of the sprocket wheel 17, and a chino 22 is attached to the pawls 21.
Links 24 connecting the bases of the chain links 23 constituting the chain links 23 and the recesses 23a provided in the lower portions of the chain links 23.

Hook 24a and drive.

Each chain link 23 is constructed in the form of a block with a flat material mounting surface 23b and a refractory material 25 inside.

The shaft 18 of the sprocket wheel 17 extends to both sides thereof, and its left and right extending ends are supported by a shaft support member 26, and the shaft support member 26 is supported by a support member 27 and connected to the support rod 9. Connected to pedestal 12.

This sprocket wheel 17 is provided for each chain conveyor arranged in parallel, and each adjacent sprocket wheel belongs to a different system group A, H.

The chain links 23 constituting the chain conveyor 8 have a guide member 29 containing a cooling medium 28 between the front and rear sprocket wheels 17 and 17 as shown in FIG.
It is supported by

Rollers 30 are provided on the upper and lower sides of the left and right side surfaces of the guide member 29, and the rollers 30 are engaged with coupling grooves 23c provided on the left and right sides of the inside of the base of the chain link 23, which are vertically symmetrical. It is guided by engagement to prevent straight running movement and to prevent the lower chain link from sagging downwards, ensuring smooth chain drive.

The guide member 29 is provided over an appropriate length between the sprocket wheels 17 and 17.
It is configured to move up and down together with 17 degrees.

Next, to explain its operation, in the heat treatment furnace 1 shown in FIG. 1, the material to be treated is conveyed from the previous process by the roller conveyor 5 and is carried into the furnace chamber S from the entrance 2.

The carried-in processing material is passed from the roller conveyor 5 to the starting point of the Cheno conveyor device 7b, and this reception is made up of a Cheno conveyor 8... in which a plurality of Cheno conveyor devices 7b are arranged in parallel in the furnace width direction. Each Cheno Conveyor 8・
... is a group 8A, 8 which is alternately different from the adjacent chain conveyor.
B, each of which performs the vertical movement and the forward conveyance movement of the conveyor as described above, and the height level of one system matches the roller conveyor 5 to receive and pick up the material to be processed.

At this time, since the Cheno conveyor 8 is systematically driven for each system 8A and 8B, the feed speed of the roller conveyor 5 and the feed speed of the Cheno conveyor 8 can be easily matched, and the material can be smoothly received and transferred. It can be carried out.

After receiving and transferring the material, the material to be processed is advanced by the forward conveyance movement of each group 8A, 8B of the Cheno conveyor 8, and when the height levels of the Cheno conveyor 8A, 8B of each group, which perform vertical movement with a phase shift, match. The receiver is used to transfer the material to be processed.

FIG. 6 shows the sprocket driving portion in cross section along the line Vl-VI or Vl/Vl/ in FIG.

The drive shafts 41A, 41B are constantly rotated in the direction of the arrow in FIG. 1 by the drive device 36 via the sprocket 1-34.35.

Since the support rod 9 moves only upward and downward, there is no need to provide a forward and backward movement section in the opening of the hearth as in conventional walking beam furnaces, resulting in less heat loss and no need for conventional water sealing. Equipment costs are reduced because it only requires something as simple as
Maintenance costs are low.

31 is the ceiling, 32 is the furnace side wall, 33 is the seal, 37.38
is a bellows, 39 is a drive shaft support, and 40 is a hearth.

FIG. 7 is an enlarged view of part A in FIG. 6.

The drive shaft has a structure in which it is supported at both ends outside the furnace and in the center, and the support part is equipped with bearings 9c cooled by a cooling medium 19 at both ends of the sprocket 17.The support rods 9a are connected to the pedestal 10 and supported and protected by heat insulating material 9a. are doing.

The material to be processed conveyed by the Cheno conveyor device 7b is passed to the previous conveyor device 7a at the middle part of the furnace 1 in the figure, and is carried out from the exit 3. The material is passed to the roller conveyor 6 on the discharge side and then transferred to the next conveyor device 7a. The receiving and passing process is carried out smoothly as described above.

The material to be treated is transported to the furnace chamber S while being conveyed by this chino conveyor device 7.
It is heated from above and below by a burner 4 installed inside, and this heating is caused by the fact that the adjacent chain conveyor systems 8A and 8B are moving up and down out of phase, so a gap is created between these chain conveyors. Moreover, since the material is received and transferred between adjacent chain conveyors, the lower surface of the material to be processed is also heated effectively and uniformly.

As is clear from the above, according to the present invention, a plurality of Cheno conveyors are arranged in the furnace width direction in the furnace chamber, the Cheno conveyors are systematized, and adjacent Cheno conveyors are made into different groups, and the phase is shifted for each group by the lifting means. Since the roller conveyor and the like that carry the material to be processed into and out of the furnace can move smoothly, the material can be transferred smoothly, and the feed speeds can be easily matched. The material to be treated can be carried into and out of the furnace smoothly, and unlike a walking beam heat treatment furnace, the receiver does not cause scratches or the like on the surface of the material to be treated during transfer.

In addition, since a chain conveyor is used as described above, it is possible to adjust the feeding speed of the processed material by adjusting the drive speed of the chain conveyor. The conveying speed of the material can be easily adjusted accordingly, which is very convenient and advantageous when the heat treatment is carried out in a continuous line.

Furthermore, according to the present invention, unlike a roller conveyor, the system uses both the lifting operation and the driving of the chino conveyor 1, so there are no problems associated with the roller conveyor system, such as heat loss in the furnace wall, restrictions on the furnace width, etc. It can be very rationally configured as a heat treatment furnace, and even though it is a chain conveyor, it performs up and down movements out of phase, so it can uniformly heat the upper and lower surfaces of the material to be treated, effectively and efficiently heating the material. In addition to being reliable, unlike the walking beam method, the surface on which the material to be processed is placed rotates endlessly, so impurities generated during heat treatment and the like are removed from the surface, allowing for good heating and conveyance.

In addition, compared to a walking beam furnace, in the present invention, the carriage only moves up and down, so the opening in the hearth is small, and sealing is simple, and water sealing can be done at a much lower cost than in the past.

It also has the advantage of being able to use bellows without using water, and the heat loss from the hearth opening is so small that it can be ignored, making it highly practical.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a side cross-sectional view schematically showing the furnace, Fig. 2 is an explanatory end view showing the combination of a chain conveyor, and Fig. 3 is a sprocket of the chain conveyor. 4 is an enlarged sectional view of the main part taken along line IV--IV in Fig. 1, Fig. 5 is an enlarged sectional view of the main part taken along line ■-■ in Fig. 1, and Fig. 6 is an enlarged sectional view of the main part taken along the VI-VI, Vl/VI/ cross-sectional view, and FIG. 7 is an enlarged cross-sectional view of A in FIG. 6. In the drawings, 1 is a heat treatment furnace, S is a furnace chamber, 7 is a chain conveyor device, 8 is a chain conveyor, 8A and 8B are systemized sets of chain conveyors, and 16 is a lifting cylinder device.

Claims (1)

[Claims] 1 In an apparatus for conveying a material to be treated such as a steel plate to be heat treated in a heat treatment furnace, a chain conveyor that is disposed in the heat treatment furnace along the conveyance direction of the material to be treated and that conveys the material to be treated is connected to the furnace. A plurality of chain conveyors are installed in parallel in the width direction, and these chain conveyors are divided into two groups, each set having every other chain conveyor in the furnace width direction, and each chain conveyor group is raised and lowered as a unit. Moving elevating means are respectively provided, and a phase difference is appropriately set in the elevating movements of these two elevating means, and the material to be processed is moved from the chain conveyor group belonging to one group to the chain conveyor group belonging to the other group by the elevating means. A device for conveying a material to be treated in a heat treatment furnace, characterized in that the material to be treated is conveyed on a chain conveyor while being alternately passed between the supports.