JPS5845314A - Chain supporting device of heat treatment furnace - Google Patents

Abstract

PURPOSE:To obtain a titled device which automatically absorbs the slack of a chain due to thermal expansion, and reduces catenary tension generated in the chain, by constituting so that an endless chain of a return path is balanced with a weight and is supported by a guide member which has been suspended so as to move up and down. CONSTITUTION:An endless chain 2 for carrying a substance to be treated P in a heat treatment furnace is hook-extended to a driving spocket 4 and a driven sprocket 5, and is turned in the direction as indicated with an arrow. In a comparatively narrow space of the lower part of a furnace bed 1, a guide member 8 for supporting and guiding said chain 2 of a return path is provided. One end of a long guide member 8 is supported through a pivotal shaft 10 by a bracket 9, and the adjacent part of the other end is balanced with a weight 12 placed so as to be freely ascendable and descendable, and is suspended and supported through chains 11a, 11b hooked to pulleys 14, 15, etc. installed to a rack base 13. Also, over the overall length of the guide member 8, a chain cover 18 of a heat insulating material is provided in order to prevent the heat radiation of the chain 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device on the return path side of an endless checker 2 for transporting processed materials in a heat treatment furnace.

Conventionally, a fixed chain holder was provided on the return path of the endless chino to support it, and the take-up was moved to approximately follow the change in length due to temperature rise and cooling between when the furnace was in operation and when it was not in operation. However, it was necessary to track and monitor the take-up each time it was operated, and the structure was also complicated. Further, in the case of a fixed chain holder, there is a problem in that even if a return chain cover is provided with a heat-insulating cover, sufficient heat insulation cannot be achieved because the chain is largely displaced in the vicinity of both sprockets and the airtightness is low. There are also chains that are left to hang naturally without a chain holder, but in this case a large space is required at the bottom of the hearth, and the size of the chain becomes larger to withstand the catenary tension due to the chain's own weight, which increases the chain's own weight. This created a vicious cycle.

The present invention provides a chino support device that can automatically absorb the weight of the chino due to thermal expansion during furnace operation, reduce catenary tension generated on the chino due to the chino's own weight, and further reduce the space required below the hearth. With the goal.

The present invention provides a guide member that supports and guides the endless chain along the return path of the endless chain, configures the guide member to be movable up and down, balances the guide member with a weight, and suspends the chain. To provide a chino support device which automatically absorbs the change in the length of an endless chino by vertical movement of a guide member and supports one stove of the endless chino in balance with a weight.

An embodiment of the present invention will be described below based on the drawings.
11) is a hearth, on one side of which is formed a movement guide path (3) for an endless chino (2) for conveying and rotating a pipe body (fish) for processing material, and the movement guide path (3) (3)
A driving sprocket (4) and a driven sprocket (5) are arranged at both ends of the sprocket, and the driven sprocket (5) is provided with a simple take-up device (not shown). 〈6) is the lower space of the hearth (1), and is the space 21 through which the return side of the ``C1C1 endless chino'' passes. At appropriate intervals in the longitudinal direction of the movement guide path (3), there are LF tubes that can be raised and lowered between a position protruding above the conveyance surface (2 m) of the endless chino (2) and a position recessed under the conveyance surface (2a). A body stopping roller (7) is arranged, and the tube body stopping roller (7) is driven up and down by a lifting device (not shown) provided in the lower hearth space (6). (8) is a long guide member disposed in the lower hearth space (6) so as to extend along the return path of the endless chino (2), one end of which is disposed at one end of the bottom wall. It is supported by a bracket (9) so as to be able to swing up and down via a horizontal pivot shaft 00, and the vicinity of the other end is arranged so that it can be raised and lowered via a string-like body (lla) (Ilb) such as a wire rope or the like. To explain in detail the 'C configuration in balance with the weight (6), a pedestal (to) is provided that surrounds the upper part and both sides near the other end of the guide member (8), and on the pedestal 0 there is a String-like body (ll
A pulley (b) for a) and a pair of pulleys (x5a) (15b) for the other string-like body (llb) are provided, and the string-like body (l1m) for -10,000 is connected via the pulley (b). and one end is the guide member (8
)- side, the other end is connected to the weight (6), and the other string-like body (llb) is connected to the other side of the guide member f8) through pulleys (16a) and (16b). is connected to the weight (2). On the upper surface of the guide member (1), guide cocks 1 for slidingly guiding the endless chino (2) and rollers (B) for reducing sliding resistance are arranged alternately in the longitudinal direction. has been done. In addition, the guide member (8) is extended toward the sprocket (4116) equipped with a heat insulating material, and covers the entire length of the return path of the endless chain C to maximize heat dissipation and cooling of the endless chain. I'm trying to make it smaller.

In the above configuration, when the °C1 furnace is not in operation, the driven sprocket (5) is moved by the take-up device and adjusted in advance to absorb the clearance of the CC endless chino 2), assembly margin, elongation due to wear of the hinge, etc. After that, rotate the endless chino (2) to operate the furnace, and when the inside of the furnace reaches the specified atmosphere, the tube body? ) in the direction of the arrow. Tube (2)
is conveyed by an endless chino (2), and the tube body is stopped by a roller (7).
When engaged, it stops and is forcibly rotated at that position as the endless chain rotates, and after a predetermined period of time, the tube stop roller (7) retracts and the next tube stop roller (7) is moved. 7) The pipe body is transported to a position and rotated at this position, and by repeating the above operation 4 times, the pipe body (?) is sequentially moved between yCI
A predetermined heat treatment is performed while being transported. The endless chino (2) that has passed through the moving guide path (3) enters the hearth lower space (6) via the drive sprocket (4), slides on the upper surface of the guide member (8), and is not guided and supported but driven. Return to sprocket staff). On the return path of this endless chain (2), the chain's own weight on the guide member (8) is the weight (2).
Since the endless chain (2) and the sprocket shaft are supported in a balanced manner, the stress generated on the endless chain (2) and the sprocket shaft is relatively small.Also, the length change due to thermal expansion of the endless chain (2) during operation is due to the change in the length of the guide member (8). Absorbed by vertical movement. Soshi°C1
The middle part of the return path of the C1 endless chain is supported by a C guide member (8) that spans a considerable length, and this guide member (8)
Since it absorbs the change in the length of C due to the vertical swing of the guide member (8), the amount of vertical movement of the guide member (8) is small relative to the amount of change in length, and the space below the hearth (6) is reduced compared to the case of natural hanging. The space is small and good. l
^ Also, the return path of the endless chain (2) is surrounded by a heat radiation prevention chain force bar over the entire length, so there is less cooling due to heat radiation, so there is less heat loss. °C tube by the contact of Cheno with tube sword?
) can be prevented as much as possible from causing uneven heat treatment, and the thermal effect on peripheral equipment can also be reduced. It is possible to reduce the reduction in the service life of the chain due to repeated cooling in the chain.In particular, in the above structure, since the guide member (1) is provided with a chain force bar (1), the endless chain bar (2) in the chain cover bar can be prevented from decreasing. Even if the distance between the passages v and 2 is made smaller, there is no problem due to contact, etc., so the effect is great.

In addition, in the above embodiment, one end of the guide member (8) is swingably supported, and a position away from the pivot position of the guide member is suspended and supported in balance with the weight. The guide member (8) may be suspended and supported at both ends so that the guide member (8) moves up and down parallel to the beam.

According to the chain support device for a heat treatment furnace of the present invention, as is clear from the above description, since the endless chain on the return path is supported by the guide member, the increase in chain length can be suppressed and the size of the chain 2 can be reduced. This guide member is configured to be movable up and down, and is suspended and supported in balance with the weight, so the space below the hearth is small, and changes in length due to thermal expansion of the endless chino at °C can be automatically absorbed. Although it has a simple configuration, maintenance and management of the endless chino is easy, and equipment costs can be reduced due to the miniaturization of the chino 2 and the space below the hearth, and other great effects are achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a partially sectional front view and FIG. 2 being a plan view of the main parts. +1)... Hearth, (2)... Endless Cheno, (3)...
・Movement guide route. (6)... Hearth lower space, (8)... Guide member, (
9)... Bracket (ro) (16m) (16b)...
Pulley, Ql... Heat radiation prevention chain cover agent Mori
Yoshihiro Moto

Claims (1)

[Claims] 1. A guide member is provided that extends along the return path of the endless checker 2 for conveying the processed material to support and guide the endless checker, and the guide member is configured to be movable up and down, and the guide member is suspended in balance with the weight. A chain support pupil for a heat treatment furnace characterized by supporting the pupil;