JP5748640B2 - Walking beam furnace - Google Patents

Description

  The present invention provides a fixed beam extending in the furnace length direction on a fixing column erected on the hearth, and a penetration frame provided in the hearth from a moving frame provided below the hearth. A driving beam extending in the furnace length direction is provided on a driving column protruding above the hearth through the section, and the moving frame is driven by the walking beam driving means, and the driving beam is passed through the driving column. This is related to a walking beam type heating furnace in which the workpieces are conveyed in order by reciprocating up and down and in the furnace length direction. In particular, in the walking beam type heating furnace as described above, the atmospheric gas in the heating furnace can be easily prevented from leaking outside or the outside air from entering the heating furnace through the penetration portion. It is an object to do.

  Conventionally, as a heating furnace in which an object to be processed is sequentially conveyed in a heating furnace and subjected to heat treatment, a fixed beam along the furnace length direction is provided on a fixing column standing on the hearth. A driving beam along the furnace length direction is provided on a driving column protruding above the hearth through a penetration part provided in the hearth from a moving frame provided below the hearth, and the movement A walking beam in which the frame is driven by the walking beam driving means, and the driving beam is reciprocated up and down and in the furnace length direction via the driving support column, so that the workpieces are sequentially conveyed in the heating furnace. A type furnace is used.

  Here, in such a walking beam type heating furnace, the atmospheric gas in the heating furnace leaks to the outside or the outside air is heated through each through portion provided in the hearth so that the driving column is inserted. There was a problem of entering the furnace.

  For this reason, conventionally, as generally shown in Patent Documents 1 to 4 and the like, a seal box having a rectangular tube shape is provided below the hearth so as to surround each of the through portions, and the above-mentioned A trough storing water on the moving frame is provided along the furnace length direction, the lower end of the seal box is immersed in the water stored in the trough, and the inside of the heating furnace is passed through each through portion. The atmospheric gas is prevented from leaking to the outside and outside air from entering the furnace.

  Here, when the trough along the furnace length direction is provided on the moving frame in this way, when the moving frame is driven by the walking beam driving means, this trough is moved up and down and along the furnace length together with the driving column and the driving beam. Since the trough is reciprocated in the furnace length direction, the trough itself and the driving beam are placed under the hearth. It is necessary to have a space with a length that combines the distance to move in the furnace length direction, and if the distance to move the drive beam in the furnace length direction is increased, the length of this space will be longer than the furnace length. There is a problem that it becomes impossible to increase the distance for moving the driving beam in the furnace length direction through the driving column.

Japanese Utility Model Publication No. 61-120754 Japanese Utility Model Publication No. 5-69148 JP 2002-294332 A JP 2010-222679 A

  This invention makes it a subject to solve the above problems in a walking beam type heating furnace, and, conventionally, a trough having water stored on a moving frame along the furnace length direction. Even if it is not provided, the atmosphere gas in the heating furnace leaks to the outside or the outside air enters the heating furnace through each through part provided in the hearth so as to be driven by inserting the driving column. It is an object to be able to easily suppress the above.

  In the walking beam type heating furnace according to the present invention, in order to solve the above-described problems, a fixed beam is provided along the furnace length on a fixing column that is erected on the hearth, and A driving beam along the furnace length direction is provided on a driving column protruding above the hearth from a moving frame provided below the hearth through a penetration provided in the hearth. In the walking beam heating furnace, which is driven by the walking beam driving means, reciprocates the driving beam up and down and in the furnace length direction via the driving support column, and sequentially conveys the workpieces. A seal plate along the furnace length direction is provided so as to sandwich the above-mentioned through portion, and at least along the furnace length direction from the seal plate on one side to the other seal plate facing the other. It is ejected water in shape, and to form a water film between opposing sealing plates.

  Here, in providing the seal plate along the furnace length direction under the hearth as described above so as to sandwich the penetration portion, the seal plate extending long in the furnace length direction is provided along the furnace length direction. In addition to providing each through-hole provided, as with conventional seal boxes, a square-plate shaped seal plate is provided under the hearth to surround each through-hole. You can also.

  Also, as described above, when water is ejected in a line along the furnace length direction from the seal plate on one side to the other seal plate facing, a water film is formed between the opposed seal plates In the downstream part where the water jetted in a line shape hits the driving column, a water film is not formed and a void is formed, and through this void, atmospheric gas in the heating furnace leaks to the outside, There is a risk that outside air may enter the heating furnace. Therefore, in order to eliminate such a gap, for example, water is formed in a line along the furnace length direction from the above-described opposite seal plates provided along the furnace length direction toward the other seal plate. When water is ejected in a line along the furnace length direction from the seal plate on one side to the other seal plate that faces the other, the drive on the opposite side of the seal plate that ejects water It is preferable to provide a closing means for closing the gap formed in the support column.

  In the walking beam type heating furnace of the present invention, as described above, the seal plate along the furnace length direction is provided below the hearth so as to sandwich the penetration portion, and at least the other seal plate facing the seal plate on one side The water was ejected in a line shape along the furnace length direction, and a water film was formed between the opposing seal plates. Therefore, the driving column was provided in the hearth so as to be driven. The water film prevents the atmospheric gas in the heating furnace from leaking to the outside or the outside air from entering the heating furnace through each through portion.

  As a result, in the walking beam type heating furnace of the present invention, there is no need to provide a trough storing water on the moving frame along the length of the furnace as in the prior art, and a large power is required to drive the moving frame. In addition, there is no need for a space that has a length that combines the length of the trough itself and the distance to move the drive beam in the furnace length direction, and the distance to move the drive beam in the furnace length direction. Therefore, it is possible to easily prevent the atmospheric gas in the heating furnace from leaking to the outside or the outside air from entering the heating furnace through each of the through portions.

  Further, in the walking beam type heating furnace of the present invention, when providing the seal plate along the furnace length direction under the hearth as described above so as to sandwich the penetration portion, the individual penetration portions are surrounded. Each square cylindrical seal plate is provided under the hearth, and water is spouted in a line along the furnace length direction from at least one side of the seal plate along the furnace length direction toward the other seal plate. If it is made to do, while the length of the part which spouts water in a line form will become short, an installation will be simplified, the amount of water to be sprinkled will decrease, and running cost will also be reduced.

  Also, water is jetted out in a line shape along the furnace length direction from the seal plates on both sides facing each other provided along the furnace length direction, or on the other side facing the seal plate on one side. In the case where water is ejected in a line along the furnace length direction toward the seal plate, there is provided a closing means for closing the gap formed in the portion of the drive column on the side opposite to the seal plate from which water is ejected. In this case, it is possible to prevent the water film in the downstream part where the ejected water hits the driving struts from forming a void, and the atmospheric gas in the heating furnace leaks to the outside through each through part, or the outside air is heated. Intrusion into the furnace can be more reliably suppressed.

It is a schematic cross-sectional explanatory drawing which showed the internal state of the walking beam type heating furnace which concerns on one Embodiment of this invention. In the walking beam type heating furnace in the above embodiment, an outline showing a state in which each rectangular tube-shaped seal plate is provided under the hearth so as to surround each through-hole provided in the hearth. It is a longitudinal cross-sectional explanatory drawing. In the walking beam type heating furnace according to the above embodiment, (A) cuts a portion of the seal plate provided so as to surround the penetration portion as described above in a direction crossing the furnace length direction, and in the furnace length direction. A water jet portion extending in a line shape is provided on one side of the seal plate along the water, and water is jetted in a line shape from the water jet portion toward the other seal plate facing, and a water film is formed between the opposing seal plates. FIG. 4B is a schematic longitudinal cross-sectional explanatory view showing a state of formation, in which a seal plate portion provided so as to surround the penetrating portion is cut in the furnace length direction and lined on one side of the seal plate along the furnace length direction. It is a schematic longitudinal cross-sectional explanatory drawing which showed the state which provided the extended water ejection part. In the walking beam type heating furnace according to the above-described embodiment, a water jet part extending in a line shape is provided on one side of the seal plate along the furnace length direction in the seal plate provided so as to surround the through part, and this water jet part It is a schematic cross-sectional explanatory drawing which showed the state which spouts water in a line shape toward the other seal plate which opposes, and forms a water film between the seal plates which oppose. In the modified example of the walking beam type heating furnace according to the above-described embodiment, the water ejection portions extending in a line shape are provided on the seal plates on both sides extending in the furnace length direction so as to sandwich the penetration portion, and the water ejection portions on both sides are provided. It is a schematic longitudinal cross-sectional explanatory drawing which showed the state which spouts water in a line shape toward the other seal plate, and forms a water film between the opposing seal plates. In the modified example of the walking beam type heating furnace according to the above-described embodiment, water is supplied in a line toward the other seal plate on the portion of the driving column on the opposite side to the seal plate on one side that ejects water in a line. Auxiliary jetting parts are provided for jetting, and a pair of guide plates whose height is equal to or higher than the distance in which the driving struts reciprocate in the vertical direction are directed to the other seal plate along the edges on both sides of the gap. The state which is provided and the block between the opposing seal plates is closed with a water film or the like is shown, (A) is a schematic longitudinal sectional view, and (B) is a schematic transverse sectional view. In the modified example of the walking beam type heating furnace according to the above-described embodiment, the distance of the driving strut reciprocating in the vertical direction on the portion of the driving strut on the side opposite to the seal plate on one side for ejecting water in a line shape A pair of guide plates at a height of 2 mm are provided facing the other seal plate along the edges on both sides of the gap, and a closing plate for closing the gap is provided between the pair of guide plates. The state which is obstruct | occluded with a water film etc. between the seal plates to perform is shown, (A) is a schematic longitudinal cross-sectional explanatory drawing, (B) is a schematic cross-sectional explanatory drawing.

  Hereinafter, a walking beam heating furnace according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. In addition, the walking beam type heating furnace according to the present invention is not limited to the one shown in the following embodiment, and can be implemented with appropriate modifications within a range not changing the gist of the invention.

  In the walking beam type heating furnace 1 in this embodiment, as shown in FIG. 1, a furnace floor 10 provided in the heating furnace 1 is provided with a necessary interval in the furnace length direction and the width direction of the heating furnace 1, respectively. A plurality of fixing columns 11 are erected. Then, a fixed beam 12 along the furnace length direction is attached on each fixing column 11 provided along the furnace length direction, and the fixed beam 12 along the furnace length direction is thus attached in the width direction of the heating furnace 1. A plurality of them are provided at required intervals.

  In addition, as shown in FIG. 2, a moving frame 20 is provided in a space portion below the hearth 10, and a plurality of driving columns 21 are passed from the moving frame 20 through the through-holes 13 provided in the hearth 10. A plurality of driving struts 21 are provided so as to protrude above the hearth 10 and in the length direction of the furnace and the width direction of the heating furnace 1 with a predetermined interval therebetween. And the driving beam 22 along the furnace length direction is attached on each driving column 21 provided along the furnace length direction, and the driving beam 22 along the furnace length direction is thus attached in the width direction of the heating furnace 1. A plurality of them are provided at required intervals.

  Further, a walking beam driving means 23 is provided under the moving frame 20, and the walking frame driving means 23 causes the moving frame 20 to reciprocate up and down and reciprocate in the furnace length direction. Each of the drive beams 22 provided in the is operated to walk.

  Then, the door 2a provided at the introduction port 2 of the heating furnace 1 is opened, the workpiece W is introduced into the heating furnace 1, and each drive beam 22 is caused to walk as described above, so that the workpiece W Are sequentially moved in the furnace length direction, the door 3a provided at the outlet 3 of the heating furnace 1 is opened, and the workpiece W thus heat-treated is taken out from the heating furnace 1. I have to.

  Here, in the heating furnace 1 in this embodiment, as shown in FIG. 2, a seal plate 14 having a rectangular tube shape is provided below the hearth 10 so as to surround each of the through portions 13. As shown in FIGS. 3A, 3B and 4, in the seal plate 14 paired along the furnace length direction so as to sandwich the penetrating portion 13 described above, the seal plate 14 on one side thereof is connected to the furnace length. A water ejection portion 15 extending in a line along the direction is provided, water is ejected from the water ejection portion 15 toward the other seal plate 14, and a water film F is formed between the opposing seal plates 14 and 14. To form. In this way, the drive column 21 is indicated by the arrow in FIG. 3B by the water film F formed between the seal plates 14 and 14 paired along the furnace length direction so as to sandwich the through-hole 13. Even when a walking operation is performed, it is always possible to prevent the atmospheric gas in the heating furnace 1 from leaking to the outside through the through-hole 13 or the outside air from entering the heating furnace 1. .

  Further, in the other seal plate 14 opposed to the seal plate 14 on one side for ejecting water in a line shape, a receiving portion 16 for receiving water guided to the seal plate 14 is provided at the lower end portion thereof. The water guided to the water is guided to the purification device 17 to remove foreign matters in the water, and then this water is returned to the water jetting part 15 for reuse.

  In addition, as described above, water is ejected in a line shape from the water ejection portion 15 provided on the seal plate 14 on one side toward the other seal plate 14 so that a water film F is formed between the opposing seal plates 14. In this case, the water film F is not formed in the downstream portion where the water jetted in a line shape hits the driving column 21 and a void S is formed. Atmospheric gas leaks to the outside, or outside air enters the heating furnace 1.

  Then, in order to eliminate such a gap S, as shown in FIG. 5, water jets that extend in a line along the furnace length direction are respectively applied to the seal plates 14 on both sides extending in the furnace length direction with the penetration part 13 interposed therebetween. A portion 15 may be provided, and water may be ejected in a line from the water ejection portions 15 on both sides toward the other seal plate 14.

  Further, in the case where water is ejected in a line shape along the furnace length direction from the seal plate 14 on one side provided along the furnace length direction to the other seal plate 14 opposed thereto as described above, the blocking means 30 is used. Thus, the gap S formed in the portion of the drive column 21 on the opposite side of the seal plate 14 from which water is ejected can be closed.

  For example, as shown in FIGS. 6A and 6B, water is ejected in a line shape toward the other seal plate 14 in the portion of the drive column 21 on the opposite side of the seal plate 14 from which water is ejected. The auxiliary ejection part 31 is provided, and when the driving column 21 reciprocates in the vertical direction, the auxiliary ejection unit 31 reciprocates in the vertical direction together with the driving column 21, The position of water ejected in a line from the ejection section 31 toward the other seal plate 14 changes, and the position of the water ejected in a line from the water ejection section 15 toward the other seal plate 14 In order to shift, the pair of guide plates 32 having a height equal to or higher than the distance by which the driving column 21 reciprocates in the vertical direction is set along the edges on both sides of the gap S formed in the portion of the driving column 21. The other It can be provided toward the Le plate 14. If it does in this way, said space | gap S will be obstruct | occluded by this water film F and this pair of guide plate 32 by the water ejected in a line form from said auxiliary | assistant ejection part 31. FIG.

  Further, as shown in FIGS. 7A and 7B, a pair of guide plates 32 having a height equal to or higher than the distance that the driving column 21 reciprocates in the vertical direction is formed in the portion of the driving column 21. In addition to being provided toward the other seal plate 14 along the edges on both sides of the gap S to be formed, a closing plate 33 for closing the gap S may be provided between the guide plates 32. Further, when a part of the water ejected in a line shape from the water ejection portion 15 toward the other seal plate 14 is guided to the other seal plate 14 through the closure plate 33, Even if there is a gap S ′ between the end portion and the other seal plate 14, this gap portion is blocked by the water guided to the other seal plate 14 through the closing plate 33.

  Further, in the above embodiment, the square-plate-shaped seal plate 14 is provided under the hearth 10 so as to surround each through portion 13, but the seal plate extended long in the furnace length direction. 14 can be provided so as to sandwich the through portions 13 provided along the furnace length direction.

  Moreover, if the space | gap S can be eliminated with the water film F as mentioned above, the magnitude | size and length of said penetration part 13 can be employ | adopted without a restriction | limiting.

DESCRIPTION OF SYMBOLS 1 Heating furnace 2 Inlet, 2a Door 3 Take-out port, 3a Door 10 Hearth 11 Fixing column 12 Fixed beam 13 Through part 14 Seal plate 15 Water ejection part 16 Receiving part 17 Purifier 20 Moving frame 21 Drive prop 22 Drive Beam 23 Walking beam driving means 30 Blocking means 31 Auxiliary ejection part 32 Guide plate 33 Blocking plate F Water film S Gap S 'Gap W Workpiece

Claims (4)

  A fixed beam extending in the furnace length direction is provided on a fixing column erected on the hearth, and the hearth is passed through a through-hole provided in the hearth from a moving frame provided below the hearth. A driving beam extending in the furnace length direction is provided on a driving column projecting above the driving column, the moving frame is driven by walking beam driving means, and the driving beam is moved up and down and through the driving column. In the walking beam type heating furnace that reciprocates in the long direction and sequentially conveys the object to be processed, a seal plate along the furnace length direction is provided under the furnace floor so as to sandwich the penetration portion, and at least Water is spouted in a line along the furnace length direction from one seal plate to the other seal plate, and a water film is formed between the opposed seal plates. Over King beam heating furnace.   2. The walking beam heating furnace according to claim 1, wherein a seal plate is provided under the hearth so as to surround the penetrating portion, and the other seal plate is opposed to at least one side of the seal plate along the furnace length direction. A walking beam heating furnace characterized in that water is spouted in a line along the furnace length direction.   In the walking beam type heating furnace according to claim 1 or 2, along the furnace length direction from the opposite seal plates on both sides provided along the furnace length direction to the other seal plate, respectively. A walking beam heating furnace characterized by spouting water in a line.   In the walking beam type heating furnace according to claim 1 or 2, in a line shape along the furnace length direction from one side seal plate provided along the furnace length direction to the other seal plate opposed thereto. A walking beam heating furnace characterized in that it includes a blocking means for blocking water gaps formed in a portion of a driving column on the opposite side of a seal plate from which water is jetted.

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