JPH0322708Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is used attached to a continuous heat treatment furnace equipped with multiple processing chambers, and is applied to the periphery of the opening in the wall that partitions the processing chambers. The present invention relates to a protection device for preventing heat damage to a provided seal member.

"Prior Art" Conventionally, a continuous heat treatment furnace as shown in FIG. 3A, for example, has been proposed. This continuous heat treatment furnace has a charging port 2 and a transport port 3 of a furnace body 1 sealed by a charging door 4 and a transport door 5, respectively, and has four processing chambers inside, namely, a receiving chamber 6,
A heating chamber 7, a soaking chamber 8, and a cooling chamber 9 are arranged in series, and openings 11 provided in walls 10 that partition these processing chambers are opened and closed by a door 13 that moves up and down by a cylinder 12. It is said that the structure is as follows. A transfer mechanism 15 for transferring the sample 14 is provided in each processing chamber, and these transfer mechanisms 1
5, the sample 14 charged from the charging port 2 is sequentially transferred through each opening 11 while being heat-treated by the heater 16.

Each processing chamber needs to be sealed so that a predetermined pressure and temperature can be maintained inside each processing chamber, and for this reason, there is a space between the door 13 and the periphery of the opening 11 in the wall surface 10 that partitions each processing chamber. A sealing member 17, such as an O-ring-shaped gasket, is attached to close the gap.

Furthermore, inside the heating chamber 7 and the soaking chamber 8, inner chambers 18 and 19 are formed respectively using a heat insulating material, and these inner chambers 18 and 19 can also be opened and closed at the same time by the door 13. is being used. A cooling fan 20 is also provided in the cooling chamber 9.

``Problems that the invention attempts to solve'' By the way, in the heat treatment furnace as mentioned above,
When transferring the sample 14, the door 13 is pulled upward as shown in FIG. Alternatively, there was a problem that the sample 14 was easily damaged by heat due to radiant heat from the sample 14, which was at a high temperature.

Therefore, when the door 13 is opened, the seal member 1
A seal member protection device that covers the seal member 7 has been considered, but none of the conventional devices has been sufficiently effective and has problems such as a complicated structure. was desired.

``Means for solving the problem'' This idea is to create a process chamber that is formed in a shape corresponding to the shape of the opening between the processing chambers, and that is placed inside the opening so that the wall surface in which the opening is provided. The heat insulating cover is characterized by comprising a cylindrical heat insulating cover that is movable in a direction perpendicular to , and a drive mechanism for moving the heat insulating cover.

"Operation" The seal member protection device of this invention positions the heat insulating cover inside the processing chamber when the door is closed, and moves the heat insulating cover toward the outside of the opening when the door is opened. Place it in a position that covers the seal member.

"Example" Hereinafter, the seal member protection device of this invention will be described in the third example.
An embodiment in which the apparatus is attached to the opening 11 between the heating chamber 7 and the soaking chamber 8 of the heat treatment furnace shown in the figure will be described with reference to FIGS. 1 and 2.

First, a first embodiment will be described with reference to FIG. In FIG. 1, reference numeral 21 is a heat insulating cover. The heat insulating cover 21 is formed into a cylindrical shape corresponding to the shape of the opening 11, and its outer dimension is slightly smaller than the inner dimension of the opening 11, and its length is equal to the thickness of the door 13, that is, the inner diameter. The size of the gap between the heat insulating materials 18 and 19 is made slightly larger. The heat insulating cover 21 is disposed inside the opening 11 such that its central axis and the central axis of the opening 11 match, and in a direction perpendicular to the wall surface 10 on which the opening 11 is formed. It is horizontally movable (that is, in the left-right direction in FIG. 1). Therefore, the outer circumferential surface 21a of the heat insulating cover 21 is the inner circumferential surface 11a of the opening 11.
It is located near the

The lower part of the heat insulating cover 21 is connected to a rod 23 of a cylinder (drive mechanism) 22 fixed to the bottom of the soaking chamber 8 via a moving cart 24, and the cylinder 22 can be driven. This allows the heat insulating cover 21 to be moved back and forth in the above directions.

In the apparatus of the first embodiment, when heat treatment is performed with the door 13 closed, the heat insulating cover 21 is positioned in the soaking chamber 8 as shown in FIG. 1A. Then, the door 13 is opened to transfer the sample 14.
When the is opened, the cylinder 22 is immediately driven to push the heat insulating cover 21 to the outside of the opening 11, and as shown in FIG.
It is placed in a position that closes the gap between the inner chambers 18 and 19.

As a result, the heat insulating cover 21
The sealing member 1
7 from receiving heat damage. Then, when closing the door 13 again after finishing the transfer,
By moving the heat insulating cover 21 to the right and drawing it into the soaking chamber 8, it does not become an obstacle to the lowering of the door 13.

According to this device, thermal damage to the sealing member 21 can be sufficiently prevented over its entire circumference, and
Heat loss from the inner chambers 18 and 19 can be reduced, and the thermal efficiency of this heat treatment furnace can be improved. In addition, since the structure is extremely simple in that the cylindrical heat insulating cover 21 is moved by the cylinder 22, there is less risk of failure and maintenance is easy.

Next, a second embodiment will be described with reference to FIG. In the device of the second embodiment, the heat insulating cover 21 is formed into a cylindrical shape similar to the first embodiment, and the drive mechanism 25 is configured to move the heat insulating cover 21 in conjunction with the opening and closing of the door 13. has been done.

That is, a dogleg-shaped lever 29 having a bent portion 26, a weight portion 27 formed at one end, and an elongated hole 28 formed at the other end is attached to the inner wall surface 10a above the opening 11. It is rotatably attached to a shaft 31 via an attachment member 30. The elongated hole 28 of this lever 29 is provided with a heat insulating cover 21.
A pin 32 attached to the upper part is engaged in the elongated hole 28 so as to be relatively movable therein. In addition, the above pin 3 on the top of the heat insulating cover 21
A roller 33 is attached to the opposite side of the door 2, and this roller 33 is adapted to roll on a guide rail 34 attached to the inner surface of the door 13. The lower end of the guide rail 34 is connected to the door 1
3, it projects obliquely forward (to the left in the figure) as shown in FIG. 2B.

In the device of the second embodiment, the lever 29 always tries to rotate in the X direction in the figure by the weight part 27 about the shaft 31, and therefore the heat insulating cover 21 is always rotated to the left in the figure by the pin 32. is energized by When the door 13 is closed, the heat insulating cover 21 is located in the soaking chamber 8 with the roller 33 pressed against the guide rail 34 as shown in FIG. 2A. When the door 13 is raised from this state, the roller 3
3 relatively roll on the guide rail 34, and when the roller 33 reaches the lower end of the guide rail 34, the heat insulating cover 21 is gradually pushed out of the soaking chamber 8 along the guide rail 34 and moves. Then, the door 13 rises further and the roller 33 moves to the guide rail 3.
4, it is pushed out to a position covering the sealing member 17 from the inside, as shown in FIG. 2B.

When the door 13 is closed from this state, the heat insulating cover 21 is first pushed by the lower end of the guide rail 34 and gradually moves to the right (accompanied by this, the lever 29 is (rotating in the Y direction shown in the figure) is pushed back into the soaking chamber 8,
It will be in the state shown in Figure A. Note that as the lever 29 rotates, the tip of the portion of the lever 29 where the elongated hole 28 is formed moves up and down, but since the pin 32 is movably engaged within the elongated hole 28, the heat insulating cover 21 horizontal movement is not obstructed.

According to the device of the second embodiment, as in the case of the first embodiment, it is possible to sufficiently prevent heat damage to the sealing member 17 and reduce heat loss, and also to prevent the door 13 from opening and closing. Since the heat insulating cover 21 is moved mechanically, no power source is required.

Although the embodiments of this invention have been described above, this invention is not limited to the above, but can be widely applied to the openings between the processing chambers of a continuous heat treatment furnace provided with a plurality of processing chambers. The shape and dimensions of the heat insulating cover may be appropriately set in accordance with the opening thereof. Furthermore, the configuration of the drive mechanism is not limited to the above, and various applications are possible.

``Effects of the invention'' As explained in detail above, according to this invention, the cylindrical heat insulating cover is moved by a drive mechanism, so when the door is opened, it is attached to the periphery of the opening. To prevent damage to the sealing member installed in the process chamber due to hot air or radiant heat,
This has the effect of being able to sufficiently prevent the damage over the entire circumference of the sealing member. Furthermore, since the structure is simple, it can be manufactured at low cost and maintenance is easy.

[Brief explanation of drawings]

Figure 1 shows the first embodiment of this invention.
Of these, A is a side sectional view showing a state in which the door is closed, and B is a side sectional view showing a state in which the door is open.
FIG. 2 shows a second embodiment of this invention, in which A is a partially enlarged side sectional view showing the door in a closed state and B is a partially enlarged side sectional view showing the door in an open state. Figure 3 is a diagram showing a schematic configuration of a continuous heat treatment furnace, in which A is an overall side sectional view showing the state in which the door is closed, and B is a partial side sectional view showing the state in which the door is open. be. 1...Furnace body, 7...Heating chamber (processing chamber), 8...
Soaking chamber (processing chamber), 10... Wall surface, 11... Opening, 13... Door, 14... Sample, 17... Seal member, 21... Heat insulating cover, 22... Cylinder (drive mechanism), 25... Drive mechanism.

Claims (1)

[Scope of utility model registration request] A plurality of processing chambers are arranged in a row inside the furnace body, and the sample is transferred through an opening provided in a wall that partitions the processing chambers, and a door is provided that moves along the wall to open and close the opening. A continuous heat treatment furnace is attached to a continuous heat treatment furnace configured such that a sealing member is provided around the opening of the wall and the opening is sealed by the door, and the sealing member prevents thermal damage when the door is opened. A sealing member protection device for preventing the sealing member from being damaged, the sealing member protection device being formed in a shape corresponding to the shape of the opening, disposed inside the opening, and perpendicular to the wall surface on which the opening is provided. 1. A seal member protection device for a continuous heat treatment furnace, comprising a cylindrical heat insulating cover that is movable in a direction, and a drive mechanism for moving the heat insulating cover.