JPS6238239Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to the field of industrial heat treatment furnaces used to heat treat metals.

[Prior Art] Some large-scale heat treatment furnaces have an elevating door at the front that is divided into left and right halves. In this furnace, when heat-treating a large object that cannot be taken in or out by simply opening one of the divided doors, the left and right divided doors are lifted at the same time, the large object is placed inside the furnace, and the left and right divided doors are lowered. Close the furnace and heat treat. Furthermore, when heat treating a small item that can be taken in and out by simply opening one of the divided doors, the item to be heat treated is placed in the furnace by opening and closing only one of the left and right doors.

In such a heat treatment furnace, a small gap (about 3 cm) is provided to prevent the left and right doors from coming into contact with each other. If such a gap exists, high-temperature gas inside the furnace will leak to the outside of the furnace, and cold air will enter the furnace from outside the furnace, reducing thermal efficiency. A split door is generally constructed by covering the inner surface of a steel door body with a refractory material, but the steel door body may be burnt out in the event of a gas leak.

As shown in FIG. 8, there is also a type equipped with a heat-resistant steel toothed seal metal 26 like a labyrinth splint, but the seal metal 26 is a consumable item, gas leakage still occurs, and when only one of the divided doors is lifted, the width of the opening is narrowed by the width of the seal metal.

[Problem that the invention aims to solve] Prevents gas from leaking through the gap between the left and right doors, and when one door is pulled up, the sealing material that seals the gap is also removed, creating a wide opening. This is to ensure that the following results are obtained.

[Means for solving problems] This will be explained with reference to FIGS. 1 to 7.

The center seal device for a divided door of a heat treatment furnace according to this invention divides the door that blocks the entrance of the furnace 1 into a plurality of parts along a vertical line, and lifts each divided door 2a and 2b by chains 6a and 6b, respectively. The adjacent split doors 2a, 2b are configured to open by
A horizontal bar 9a with enlarged ends is provided on both upper and lower sides of the elongated steel center seal frame 7 to which a heat-resistant ceramic fiber 8 is fixed so as to face the gap 5 and the surfaces of the divided doors 2a, 2b in the vicinity thereof. ，
Upward hook piece 13 that receives 9b, 10a, 10b
a, 13b, 14a, 14b adjacent split door 2
The center seal members 12 provided on the upper and lower sides of the furnace walls are engaged with the center seal members 12 provided above and below the furnace walls, and the center seal members 12 are attached to the divided doors 2a, 2.
Upper and lower pressing mechanisms 19 and 24 are provided for pressing in the direction b.

[Example] This will be explained based on FIGS. 1 to 7.

1 is a furnace, 2a and 2b are divided doors that close the entrance of the furnace 1, and there are parts 3a and 3b made of steel and a part 4 made of heat-resistant material.
a, 4b. 5 is both division 2
The gaps 6a and 6b formed between a and 2b are chains that suspend the split doors 2a and 2b.

7 is a steel center seal frame, 8 is a heat-resistant ceramic fiber fixed to the back side of the center seal frame 7, 9a, 9b, 10a, 10b are horizontal bars protruding from both upper and lower sides of the center seal frame 7, 11 is a horizontal bar These are enlarged portions provided at the tips of 9a, 9b, 10a, and 10b. With the above, center seal member 1
2 are configured.

13a, 13b, 14a, 14b are split doors 2
The upper and lower horizontal bars 9a and 10a of the center seal member 12 are the upper and lower hook pieces 1 of the left side split door 2a.
3a, 14a to be supported. At this time, the enlarged portion 10 prevents the horizontal bars 9a, 10a from slipping out from the hook pieces 13a, 14a.

Similarly, the upper and lower horizontal bars 9b and 10b on the right side of the center seal member 12 are hooked onto and supported by the upper and lower hook pieces 13b and 14b of the right side divided door 2b. At this time, the ampulla 11 is the horizontal bar 9b, 1
0b is prevented from being pulled out from the hook pieces 13b, 14b.

When both the divided doors 2a, 2b are closed, both ends of the horizontal bars 9a, 9b, 10a, 10b are adapted to engage the hook pieces 13a, 13b, 14a, 14b at the same time.

Reference numeral 15 designates a fluid cylinder provided on the upper wall of the furnace wall, and is configured such that the engaging portion 18 of the center seal frame 7 that has descended to the large diameter portion 17 at the tip of the rod 16 can engage with the fluid cylinder. When shortened, the large diameter tip portion 17 pulls the engaging portion 18 and draws the center seal member 12 toward the gap 5. The upper pressing mechanism 19 is configured as described above.

Reference numerals 20 and 21 denote a fluid cylinder and a bell crank which are pivotally supported on the outer surface of the lower wall of the furnace wall, and the tip of the rod 22 of the fluid cylinder 20 is pivotally connected to one piece of the bell crank 21. When the rod 22 is extended, the other piece 23 of the bell crank 21 pushes the center seal member 12 toward the gap 5. The lower pressing mechanism 24 is configured as described above.

[Function] When the left side split door 2a is pulled up while the pressing mechanisms 19 and 24 are loosened, the horizontal bars 9a and 10 supported by the upper and lower hook pieces 13a and 14a are pulled up.
The center seal member 12 is pulled up via a.

When the right side split door 2b is pulled up, the horizontal bars 9b and 10b supported by the upper and lower hook pieces 13b and 14b
The center seal member 12 is pulled up through.

After loading and unloading the heat treated material 25, open the split door 2a.
(or 2b), and press mechanism 1 as necessary.
9 and 24 push the center seal member 12 and press the ceramic fiber 8 against the divided doors 2a and 2b on both sides of the gap 5, thereby sealing the gap 5.

[Effect of the invention] The gap 5 can be reliably sealed, and the split doors 2a and 2b
This prevents burnout and extends the life of the door. Further, when either of the divided doors 2a and 2b is pulled up, the center seal member 12 is raised together with the raised divided door 2a (or 2b), so that it does not interfere with the taking in and out of the heat-treated material 25.

In addition, the center seal member 12 is attached to the split door 2a.
(or 2b), the structure can be simplified without requiring a special drive device.

[Brief explanation of the drawing]

Figures 1 to 7 show this invention; Figure 1 is a front view with the split door closed; Figure 2 is a front view with the split door closed;
The figure is a front view with one split door open.
Fig. 3 is a - view of Fig. 1, Fig. 4 is a - view of Fig. 1, Fig. 5 is a - view of Fig. 1, and Fig. 6 is a - view of Fig. 1.
The figure is a - view of Fig. 1, and Fig. 7 is a - view of Fig. 3.
This is a perspective view. FIG. 8 is a diagram corresponding to FIG. 5 of the conventional product. 1...furnace, 2a, 2b...divided door, 3a, 3b
...Steel part of the split door, 4a, 4b...Heat-resistant material part of the split door, 5...Gap, 6a, 6b...
Chain, 7...Center seal frame, 8...Ceramic fiber bar, 9a, 9b...Horizontal bar (top),
10a, 10b horizontal bar (lower), 11... ampullary part,
12...Center seal member, 13a, 13b...
...Hook piece (top), 14a, 14b...Hook piece (bottom), 1
5...Fluid cylinder (top), 16...Rod (top), 17...Tip large diameter part, 18...Engaging part, 1
9... Upper pressing mechanism, 20... Fluid cylinder (lower), 21... Bell crank, 22... Rod (lower), 23... Other piece of bell crank, 24... Lower pressing machine, 25 ...Heat-treated product, 26...Seal hardware.

Claims (1)

[Scope of utility model registration request] The door that blocks the entrance of the furnace is divided into a plurality of parts along a vertical line, and each divided door is opened by being lifted by a chain, and a gap is provided between adjacent divided doors, and the gap and the vicinity thereof are A horizontal bar with an enlarged end is protruded from both upper and lower sides of an elongated steel center seal frame to which a heat-resistant ceramic fiber is fixed so as to face the surface of the split door, and an upward hook piece that receives the horizontal bar is attached to an adjacent split door. A center for a divided door of a furnace, which is provided with upper and lower pressing mechanisms that engage with a center seal member descending on the upper and lower parts of the furnace wall and press the center seal member in the direction of the divided door. sealing device.