JPS6237312A - Sealing device for beam post in walking beam - Google Patents

Abstract

PURPOSE:To surely seal an aperture in which a beam is pushed and passed with simple construction by moving a sliding plate integrally with the forward and backward movement of a moving beam post and bringing the sliding plate into press contact with the bottom surface of an isolating hearth at all times thereby sealing said aperture. CONSTITUTION:The moving beam post 5 moves together with the sliding plate 8 when the post 5 moves forward and backward in the operation stage. Then the sliding plate 8 is kept pressed by a weight 17 via rollers 16, 16 to a base plate 6 provided to the bottom surface of the hearth 2 and slides in this state so that the aperture 4 is always held closed by the plate 8 to prevent the leakage of the atmosphere in the furnace. The post 5 slides up and down via a bearing 10 of the plate 8 when the post 5 moves up and down. The leakage of the atmosphere in the furnace from the bearing part of the post 5 is prevented by rollers 18, 18 and shielding plates 20, 20.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a walking beam processing furnace, in which a moving beam support is installed in an isolated hearth between a processing chamber and a machine room pipe, through which a moving beam column is inserted so as to be able to move up and down and back and forth. This invention relates to a dry sealing device for an opening.

(Prior Art and its Problems) Conventionally, water sealing has been used as a means for sealing the opening provided in the isolated hearth of a walking beam processing furnace. There are problems such as water scattering when the beam support is moved, water vapor generated inside the furnace, problems with its disposal, and the need for water replenishment, drainage, etc. There are many problems such as heat loss caused by the wastewater in the processing chamber atmosphere.

Therefore, there is a need for a means for dry sealing the opening.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and it provides a dry method to easily and reliably seal the opening of an isolation hearth through which a moving beam column is inserted so as to be able to move up and down as well as back and forth. The present invention provides a sealing device for a beam support in walking.

(Structure of the Invention) In order to achieve the above object, a sealing device for a beam support in a walking beam of the present invention is provided. A sliding plate is provided in sliding contact with the lower surface of the isolated hearth in such a manner as to provide an opening through which the pillar can be slidably inserted, and to close this opening, and the pillar is passed through the sliding plate in a vertically slidable manner. The sliding plate and the pillar can be moved back and forth in unison, and the sliding plate is always in pressure contact with the lower surface of the isolated hearth. The movable beam support is configured to be able to move up and down and back and forth while the beam is closed.

(Description of Embodiments) To explain the embodiments of the present invention with reference to the drawings, (1) is a processing chamber of a walking beam processing furnace, and a machine room (3) is provided below it via an isolation hearth (2). be.

(4) is the opening made in the hearth (2), and the beam support (
5) is passed through so that it can move up and down and back and forth.

Note that openings (4) through which beam supports (5) pass are provided at predetermined intervals in the hearth (2), but only one is shown in the figure.

(6) is a base plate that is integrally fixed to the lower surface (machine room (3) side) of the hearth (2) where the opening (4) is provided, and is of the same size and shape and communicates with the opening (4). A through hole (7) is provided, and the lower surface thereof is formed into a smooth surface.

(8) is a sliding plate that is slidably in contact with the lower surface of the plywood (6), and the beam support (5) is inserted into the bearing aψ fixed to the central hole (9) so as to be slidable up and down. be.

Reference numeral 11 designates a bell crank whose central portion is rotatably pivoted by a shaft 13 to one end of a side plate 12 that is integrally hung from the plywood (6). Both ends of a parallel rod 15.15 are rotatably connected between a lever 14 whose lower end is rotatably connected to the lower end of the upper parallel rod 15, and trochanters 16.16 are rotatably connected to both ends of the upper parallel rod 15. The bell crank 13 is rotatably pivoted, and a weight 17 is suspended from the end of the bell crank 13, and the gravity of the weight 17 moves the trochanter 16.16 to the lower surface of the sliding plate (8) via the parallel rod 15. Press the sliding plate (
8) is always in sliding contact with the lower surface of the plywood (6).

18.18 is a pair of rollers arranged so as to surround the beam support (5) from both sides, and the rollers rotate between the brackets 19.19 integrally hung on both sides of the center of the sliding plate (8). The shape of the roller groove 18a is formed into a semicircle if the support (5) is circular, or a square groove that matches the shape if the support (5) is square, so that the support (5) can slide up and down. It is freely supported.

20.20 is a shielding plate fixed to the central lower surface of the sliding plate (5) with its both ends touching the opposing surface of the bracket at right angles to the bracket 19.19;
．． It is brought into sliding contact with the upper part of the support column (5) to prevent leakage of atmosphere from the processing chamber (11) due to the vertical movement of the support column (5).

With this configuration, the moving beam support (5
) moves back and forth and up and down, the support column (
5) moves together with the sliding plate (8), and the sliding plate (8) is pressed by the weight 17 through the trochanter 16 and 16 against the plywood (6) provided on the lower surface of the hearth (2). The sliding plate (8) always closes the opening (4) to prevent leakage of the furnace atmosphere and air. Note that heat-resistant grease is applied to the lower surface of the plywood (6) to enable smooth sliding of the sliding plate (8).

Further, when the support column (5) moves up and down, the support column (5) slides up and down through the bearing Ql of the sliding plate (8), and the roller 18.
18 and shielding plates 20 and 20 prevent the furnace atmosphere from leaking from the bearing portion of the support column (5).

FIG. 3 shows another embodiment of the present invention, in which a heat insulating plate 21 has a pillar (5) slidably inserted through the center of the sliding plate (8) instead of the shielding plate 20 in the previous embodiment. At the same time, a sliding ball bearing 22 is attached to the lower surface of the heat insulating plate 21, and the column is slidably inserted into the ball bearing 22. The other configurations are the same as those of the previous embodiment.

With this structure, when the support (5) moves back and forth, the opening is kept closed by the sliding plate (8) as described above to prevent the atmosphere inside the furnace from leaking, and the support (5) is moved back and forth. During vertical movement, a heat insulating plate 21 prevents radiant heat from the processing chamber (11), and leakage of the furnace atmosphere is prevented by heat-resistant grease in a sliding ball bearing 22 and a large number of steel balls.

Figure 4 shows the hearth (
2) and the sliding ball bearing 22, and the machine room (
3) prevents the radiant heat from the processing chamber (1) over a wide area to minimize the temperature influence on the sliding ball bearing 22, It is constructed to last.

(Effects of the Invention) As described above, according to the sealing device for a beam support in a walking beam of the present invention, the sliding plate is moved integrally with the back-and-forth movement of the moving beam support, and the sliding plate is always attached to the isolated hearth. Since the beam insertion port is sealed by pressure contacting the lower surface, it eliminates the complexity of conventional water-sealing sealing means and provides reliable sealing with a simple structure. It can greatly contribute to improving quality and saving energy.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a vertical sectional front view of Example 1, FIG. 2 is a bottom view taken along line A-A in FIG. FIG. 4 is a longitudinal sectional front view of Example 3. +11...Processing room, (2)...Isolation hearth, (3)
... Machine room, (4) ... Opening, (5) ... Beam support, (8) ... Sliding plate, 00 ... Bearing, 11 ...
・Bell crank, 17... weight. Rabe I Panabe Go 8 Shibe JA - ShiX 4 included

Claims (3)

[Claims] (1) In a walking beam processing furnace, an opening is provided in the isolated hearth between the heat treatment chamber and the machine room, through which the moving beam support can be moved up and down and back and forth, and this opening is closed. A sliding plate is brought into sliding contact with the lower surface of the floor, and the pillar is passed through the sliding plate so as to be able to slide up and down, so that the sliding plate and the pillar can move back and forth together, and the sliding plate is A sealing device for a beam support in a walking beam, characterized in that it is in constant pressure contact with the lower surface of an isolated hearth. (2) A pair of rollers are rotatably supported by supporting columns on the lower surface of the sliding plate, and a shielding plate is provided extending from the roller groove to the lower surface of the sliding plate. A sealing device for a beam strut in a walking beam according to claim 1. (3) A heat insulating material is integrally provided on the sliding plate facing the opening, and the column is supported via a sliding ball bearing so as to be vertically movable. A sealing device for a beam strut in a walking beam as described in Section 1.