JPS63756Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a sealing device for a heat treatment furnace, and in particular, a seal roll is formed from a material that is highly heat resistant and flexible, such as asbestos, and is inserted into the heat treatment furnace. It is installed on the carry-in roller in the outlet so that it moves up and down according to the thickness of the material when it is carried in and out, and the seal roll presses against the surface of the material to seal the inside of the furnace. The present invention relates to a sealing device for a heat treatment furnace.

[Prior Art] As a conventional sealing device for a heat treatment furnace, the one shown in FIG. 1 is employed. As shown in the figure, a door 3 equipped with water sealing means is provided on the rear side of the inlet section 2 of the furnace 1 in the carrying direction, and a carry-in roller 5 for the material to be processed W is provided between the front side of the door 3 and the material inlet 4. , 5, a plurality of curtains 6 made of stainless steel plates or the like are suspended in several stages in the front-rear direction. The curtains 6 are set to maintain a predetermined clearance with the surface of the material to be processed W so as not to damage the surface of the material to be processed W being carried in and to prevent wear of the curtain itself.

[Problems to be solved by the invention] When the door 3 is opened to carry in the material W to be treated from the inlet 4 as shown in the figure, the inside of the heat treatment chamber 7 of the furnace 1 is
Atmospheric gas such as N ₂ gas leaks to the outside from the clearance between the surface of the carried-in workpiece W and the curtain 6, causing heat loss and gas loss within the furnace, resulting in an undesirable problem. This is the same since the exit part of the furnace is also configured in the same way, and the material to be treated W
It would be extremely inconvenient if the above-mentioned heat loss and gas loss occurred each time the material was brought in and taken out, and it would be inconvenient to effectively utilize thermal energy and perform effective heat treatment. In particular, when constructing a continuous heat treatment line for processed materials, materials will be brought in and taken out frequently.
The above-mentioned inconvenience becomes significant.

In view of the above-mentioned problems with sealing means in heat treatment furnaces, the inventor of the present invention has developed the present invention as a result of intensive research in order to effectively solve the problems.

[Purpose of the invention] The purpose of the invention is to form a seal roll from a flexible material with excellent heat resistance such as asbestos, and to press it onto a roller for carrying in the material to be treated so that it can be raised and lowered. We provide a sealing device with an extremely high sealing effect by pressing the surface of the material being carried in with a seal roll, thereby effectively reducing heat loss and gas loss in the furnace when carrying in and out of the material to be treated. The present invention provides a sealing device that prevents heat treatment and is preferable for heat treatment, and also provides a sealing device that achieves the above with a simple structure and can be effectively implemented in various heat treatment furnaces.

[Summary of the invention] In order to achieve the above object, the present invention has a roller conveyor for conveying the material to be processed from the carry-in side to the carry-out side, and also carries the material to be processed in and out of the carry-in side and the carry-out side. In a heat treatment furnace that has an open loading/unloading port, a plurality of rollers made of a material with excellent heat resistance and flexibility such as asbestos are placed along the axial direction on the rollers of a roller conveyor formed on the loading/unloading side. Consisting of a seal roll constituted by a disk, and a hanging means that rotatably supports the seal roll and lifts and moves it up and down by being pushed up in contact with the surface of the processed material transferred onto the roller. The inside of the furnace is sealed by following the thickness of the material to be processed passing through the loading/unloading port of the furnace and bringing the seal roll into contact with the thickness.

[Example] An example of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 2 shows a heat treatment furnace 1 equipped with the sealing device of the present invention.
0, 11 is a furnace body, 12 is a furnace chamber, and inside this furnace chamber 12, rollers 13 for conveying the processed material W are disposed at the same level at a predetermined interval from the entrance. burners 14 are installed above and below the roller conveyor formed by these rolls 13...
...is arranged.

A carry-in chamber 16 is formed between the furnace chamber 12 and the inlet 15 of the furnace body 11, and a door 17 is provided at the rear of the carry-in chamber 16 in the carry-in direction. A seal 18 is provided. The door 17 is suspended and supported by a beam 19 and further connected to a weight 22 via a chain 20 and a pulley 21, and is also connected to the front and rear hanging pieces 19a of the beam 19.
19b is sealed with water seals 23, 23, and since the illustration shows the time when the material to be processed W is being carried in, the door 1
7 is raised to a certain level from the level of the roller 13 in consideration of the thickness of the material to be processed W so as not to come into contact with it, and is opened.

The roller 1 is placed in front of the door 17 of the loading room 16.
3... are provided with carry-in rollers 24, 24 at the same level, and the one on the entrance 15 side of this carry-in roller 2
A seal roll 25 is arranged on 4a.

The seal roll 25 is as shown in FIGS. 3 and 4, and is made of a single disk 26 made of a flexible and heat-resistant material such as asbestos.
A large number of... are formed, and a hole 27 is formed in the center of the hole 27.
This is inserted into the shaft rod 28 in a layered manner and arranged in parallel to form a roll, and the rolled disc unit 26
Holders 29, 29 are placed on both axially outer sides of the seal roll 2 to regulate the axial direction, and the seal roll 2 as shown in FIG.
5.

The seal roll 25 is suspended by hanging means as shown in FIG. A seal roll 25 is provided parallel to the roller 24a, and both ends of the shaft rod 28 extend outward through the left and right walls 16a of the carry-in chamber 16, and the seal roll 25 is placed so as to be in contact with the carry-in roller 24a. This shaft extending end 28a is rotatably supported by a bearing 30, and this bearing 30 is connected to a beam 31 provided on the top wall 16b of the loading chamber 16 by a connecting rod 32 and a chain 33, and the front and rear of the beam 31 are The hanging pieces 31a, 31a provided on the top wall 16b and the left and right hanging pieces 31b are sealed by being immersed in water seals 34 provided on the top wall 16b. beam 3
1 is connected to a weight 37 via a chain 35 and a pulley 36, thereby reducing the weight of the seal roll 25 including the beam 31 etc., and easily and smoothly follows the material W to be processed and moves up and down. It is configured as follows.

A shaft extending end 28a extending outside the wall 16a,
The portion including the lower half of the bearing 30 and the connecting rod 32 is the wall 16.
It is covered with a cover 38 provided on the outer surface of a, and prevents the leakage of furnace gas from the vertical long hole 16c through which the shaft 28 passes. Umbrella-shaped covering pieces 39, 39 are provided on the front and rear of the seal roll 25 to cover the upper part of the seal roll 25, and a shielding plate 40 is suspended from the beam 31 over the entire axial length of the seal roll 25. It is pivotally attached to the lower end of the seal roll 25, and is always in sliding contact with the front and rear of the seal roll 25, and together with the shielding plate 40, blocks the front and rear of the loading chamber 16 partitioned by the seal roll 25. In the drawing, reference numeral 41 denotes a driving means such as a chain, a sprocket, and a motor for driving the carry-in roller 24.

Next, to explain the operation of the present invention in detail, FIG. 2 shows the process when the material W to be treated is being carried in. The material to be processed W is rolled and sent on conveyance rollers (not shown) and reaches the entrance 15 of the furnace 10. In this case, the external roller group and the inner roller group 24..., 13... rotate at the same speed. being driven. The lower end of the seal roll 25 is lightly pressed and slid into contact with the upper end of the opposing carry-in roller 24a by the action of the weight 37, and while rotating on the shaft 28, the door 17 is opened by the seal roll 25, the shield plate 40, and the cover piece 39. The entrance side and the door side, which communicate with the atmosphere, are effectively blocked off.

When the material to be processed W is carried in through the entrance 15, the tip of the material W hits the seal roll 25, which is lightly pressed against the roller 24a by gravity, and is pushed up and enters between them. Roll 25 becomes beam 3 due to the action of the weight.
1 rises and is suspended in the elevated position and lightly presses against the surface of the material W to be processed by its gravity, and as the material W is carried in, it rotates and connects the entrance 15 side of the loading chamber 16 and the door. Block the 17 side. Therefore, even when the material W to be processed is carried into the carrying-in chamber 16, the front and back sides of the material W are effectively blocked by contact with the surface of the material W to be processed by the seal roll 25, and a high sealing effect can be obtained. Even if the thickness of the material W to be processed changes, the seal roll 25
is not fixed, but can be moved up and down as mentioned above,
In addition, since it contacts the surface of the material W to be treated with a light constant pressure due to the action of the weight, it can extremely easily follow and respond even if the plate thickness changes, and performs an effective sealing action.

In the above, since the seal roll 25 is made of a material such as asbestos, the surface of the material to be treated W is not damaged, and since it is in contact with the material to be treated to the extent that it is lightly pressed due to the action of the weight, the seal roll 25 is sealed. Wear of the roll 25 can be minimized and its lifespan can be extended.

Further, the seal roll 25 gradually wears out due to repeated loading of the material to be processed, etc., but since it is suspended as described above, it descends as the wear progresses, so that sealing can be performed without any problem until a predetermined wear state is reached. Furthermore, if it is to be replaced due to wear, it is only necessary to remove the disk chain 26 from the shaft 28 and install a new disk chain, and since the seal roll 25 is a laminated body of the disk chain 26, molding is extremely easy. It's easy.

In the illustrated embodiment, the loading side of the material to be processed W is shown, but the unloading side is also constructed in the same manner.

[Effects of the Invention] As is clear from the above, the present invention provides the following excellent effects.

(1) The seal roll is made of a flexible material with excellent heat resistance, such as asbestos, and is suspended above the roller on the loading side of the material to be treated so that it can move up and down. As the material is brought into the furnace while pressing against the surface of the material to be treated, the heat and gas inside the furnace are effectively sealed, and the leakage of heat and gas that occurs when the material to be treated is brought in is effectively prevented. It is very effective in preventing heat treatment and is excellent as a sealing device in continuous heat treatment.

(2) In addition, since a seal roll is used with the above material, it will not damage the material to be treated even if it comes into contact with the material during transport to and from the furnace, and will effectively protect the material while sealing effectively. At the same time, even if the seal roll is worn, the sealing action can be reliably performed by following this wear.

(3) Molding is facilitated by adopting a configuration in which the seal roll has a plurality of disks stacked in the axial direction.

(4) The sealing device has a relatively simple structure and is highly versatile as it can be used in various types of furnaces.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an example of a conventional sealing device, Fig. 2 is a side sectional view of a heat treatment furnace employing the sealing device according to the present invention, Fig. 3 is a front view of a seal roll, and Fig. 4 is a side sectional view showing an example of a conventional sealing device. A perspective view of a seal roll component,
FIG. 5 is a front sectional view of the main parts of the sealing device. In the figure, 10 is a furnace, 24 is a roller, 25 is a seal roll, and W is a material to be treated.

Claims (1)

[Scope of utility model registration request] In a heat treatment furnace that has a roller conveyor for transporting the material to be treated from the import side to the discharge side, and has an open loading/unloading port for transporting the material to be treated on the loading side and the loading/unloading side, the loading/unloading side On the rollers of a roller conveyor formed in A sealing device for a heat treatment furnace, comprising a hanging means that freely supports the material to be treated and that is pushed up and moved up and down in contact with the surface of the material being transferred onto the rollers.