JP6559826B1 - Walking beam type conveying device and method of remodeling walking beam type conveying device - Google Patents

Abstract

The present invention provides a walking beam type conveying apparatus in which a beam is not easily bent even on the introduction port side where an object to be heat-treated is introduced, and a method for remodeling the walking beam type conveying apparatus. A plurality of beams on which an object to be heat-treated introduced from an introduction port is placed are connected along a furnace length direction, and each beam includes a movable moving beam and a fixed fixed beam. It is a walking beam type conveying device, and at least one of a moving beam and a fixed beam supported at both ends by a support column 5 is arranged on the inlet side of a plurality of beams continuous along the furnace length direction. The position P1 of the lower surface 16 at both ends in the furnace length direction of the arranged inlet side beams 3X and 4X is lower than the position P2 of the lower surface 16 at the center. [Selection] Figure 4

Description

  The present invention relates to a walking beam type conveying apparatus in which a beam is difficult to bend even on the inlet side where a material to be heat-treated is introduced, and a method for remodeling the walking beam type conveying apparatus.

  As a walking beam type transfer device, for example, as in Patent Document 1, it is composed of a fixed beam and a moving beam, and materials such as slabs, blooms, billets, and beam blanks are fixed and moved by moving the moving beam up and down. 2. Description of the Related Art A walking beam furnace transport device that transports while alternately replacing each other is known. Each beam used in this walking beam type conveying device has the same cross-sectional shape over the entire length in the furnace length direction as in Patent Document 2, or both ends in the furnace length direction are Some are thinner than the center.

Japanese Patent No. 5972424 Japanese Utility Model Publication No.59-33751

  Since the beam is provided in the heating furnace as in the above conventional walking beam type transfer device, the beam itself is also heated and extends, but the beam provided in the vicinity of the inlet is not heated. It is cooled repeatedly by placing the normal temperature material. For this reason, the mounting surface on which the object to be heat-treated is mounted, i.e., the upper surface side is thermally contracted from the lower surface side, so that both end portions are warped upward and the mounting surface, which is desirably flat, is curved. There is a problem that it ends up.

  In addition, the walking beam type transfer device places a heavy heat-treated object on the beam, so that the center side in the longitudinal direction (furnace length direction; transfer direction) of the beam warps downward by long-term operation. May be deformed. In order to prevent such a deformation, there is a case where the thickness of the center side of the beam is made thicker than the thickness of both ends as in Patent Document 2, but when such a beam is provided on the inlet side. However, there is a problem that the difference between the amount of shrinkage on the upper surface side and the amount of thermal extension on the lower surface side becomes large, and warping occurs more significantly.

  The present invention has been devised in view of the above-described conventional problems, and is a walking beam type conveying device and a walking device in which a beam is difficult to bend even on the introduction port side (near the introduction port) into which a workpiece is introduced. It aims at providing the modification method of a beam-type conveyance apparatus.

In the walking beam type conveying apparatus according to the present invention, a plurality of beams on which a material to be heat-treated introduced from an introduction port is placed are connected along the furnace length direction, and each of the beams is a movable beam that is movable. A walking beam type conveying device comprising a fixed beam and a fixed beam, and at least one of the moving beam and the fixed beam supported at both ends by a support column, a plurality of continuous beams along the furnace length direction. wherein said one of the beams, the most the definitive furnace length direction of the introduction port side beams located on the inlet side, the lower surface position of the one end portion only of the conductor inlet side is lower than the position of the lower surface of the central portion And

The inlet side beams, the upper surface is flat, definitive in that the furnace length direction, only one end portion of the inlet side, characterized in that the thickness from its center side protrudes thicker downwardly.

The inlet side beam definitive the furnace length direction, cross-sectional intensity of the one end portion only of the inlet side being greater than the cross-sectional intensity of the central portion.

  The cross-sectional strength of the central portion of the inlet side beam is equal to or higher than the cross-sectional strength of the central portion of the beam other than the inlet side beam.

Further, in the remodeling method of the walking beam type conveying apparatus according to the present invention, a plurality of beams on which the heat-treated material introduced from the introduction port is placed are connected along the furnace length direction, and each of the beams moves. A method for remodeling a walking beam type conveying apparatus comprising a movable beam and a fixed beam, wherein a plurality of the beam and the fixed beam are arranged along a furnace length direction. of said beam, most inlet side beams located on the inlet side, definitive the furnace length direction, less modified than the position of the lower surface of the lower surface of the position of the one end portion only of the conductor inlet side central portion It is characterized by exchanging it with a beam.

  According to the walking beam type conveying apparatus and the remodeling method of the walking beam type conveying apparatus according to the present invention, it is possible to make it difficult for the beam to be curved even on the inlet side where the object to be heat-treated is introduced.

It is an example of the walking beam type conveying apparatus to which the present invention is applied, and is a partial cross-sectional explanatory view for explaining a state where the drive beam is lowered. FIG. 2 is a partial cross-sectional explanatory diagram illustrating a state in which the driving beam is lifted and moved forward in the walking beam type transport device shown in FIG. 1. It is a top view of the walking beam type conveying apparatus shown in FIG. It is a side view which shows the beam located in the most inlet side which shows suitable one Embodiment of the walking beam type conveying apparatus concerning this invention. It is a side view which shows other beams other than the beam located in the introduction port side which shows suitable one Embodiment of the walking beam type conveying apparatus concerning this invention. It is a side view which shows the beam most located in the inlet side which shows the modification of the walking beam type conveying apparatus concerning this invention. It is a side view which shows the beam most located in the inlet side which shows the other modification of the walking beam type conveying apparatus concerning this invention.

  Hereinafter, preferred embodiments of a walking beam type conveying apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

  Various types of heating furnaces including the walking beam transfer device 1 are known. 1 to 3 show an example of the walking beam type conveying apparatus 1. The present invention is not limited to the following example, and can be applied to any type of walking beam type conveying apparatus.

  A furnace body 33 of a heating furnace constituted by a furnace floor 30, a furnace wall 31, and a furnace ceiling 32 is installed on a mounting floor surface 35 in which a dug portion 34 extending in the furnace length direction is recessed. A plurality of pillars 5 are erected on the hearth 30, and a plurality of fixed beams 4 along the furnace length direction are provided on the pillars 5 in the furnace width direction with a required interval, and the first in the dug portion 34. An elevating member 39 that moves up and down by the drive device 38 is provided along the furnace length direction.

  In the ascending / descending member 39, on the floor surface 34a of the digging portion 34, a plurality of inclined guide portions 40 that are inclined in the vertical direction and extend in the furnace length direction are provided in the furnace length direction with a required interval, and the furnace A plurality of upper rollers 42 and lower rollers 43 are provided on the upper and lower sides of the operation frame 41 extending in the longitudinal direction at a required interval in the furnace length direction, and the lower rollers 43 provided on the operation frame 41 are disposed above the inclined guide portion 40. To keep it.

  A cylinder is used as the first driving device 38, and one end of an operating frame 41 is connected to the tip of an extending / contracting rod 38a that is expanded and contracted by the first driving device 38. The lower roller 43 provided on the operation frame 41 is reciprocated along the inclined guide portion 40, and the operation frame 41 provided with the upper roller 42 and the lower roller 43 is moved up and down. It moves in the direction.

  A driving frame 45 that is held up and down by the upper roller 42 in the elevating member 39 is provided along the furnace length direction, and the column 5 is extended from the driving frame 45 through each through portion 30 a provided in the hearth 30. A plurality of drive beams 3 extending in the furnace length direction are provided on the support pillars 5 in the furnace width direction with a predetermined interval on the support column 5, and a drive frame 45 is provided in the dug portion 34. The drive beam 3 provided on the drive frame 45 is reciprocated in the furnace length direction by being reciprocated in the furnace length direction by the second drive device 44.

  A cylinder is used as the second drive device 44, and one end of a drive frame 45 is connected to the tip of an extendable rod 44a that is expanded and contracted by the second drive device 44, and the extendable rod 44a is expanded and contracted to attach the drive frame 45. By reciprocating in the furnace length direction, the drive beam 3 provided on the drive frame 45 is reciprocated in the furnace length direction.

  The material 2 such as a slab, which is transported in the heating furnace by the walking beam transport apparatus 1 and is heat-treated, for example, opens the door 48 provided at one end of the furnace body 33 and opens the furnace body 33 from the introduction port 48a. And is held on the fixed beam 4. Then, the lifting / lowering operation of the lifting member 39 by the first driving device 38 and the operation of reciprocating the driving beam 3 provided on the driving frame 45 by the second driving device 44 in the furnace length direction are sequentially performed. The beam 3 is walked (rectangular motion), the material 2 is sequentially moved in the furnace length direction toward the take-out port 49a and heat-treated, and the door 49 provided at the other end of the furnace body 33 is opened. The heat-treated material 2 is taken out from the take-out port 49a.

  The driving beam 3X and the fixed beam 4X (hereinafter simply referred to as “beams 3X, 4X”) located closest to the introduction port 48a of the walking beam type conveying device 1 have an unheated workpiece 2 and a relatively low temperature. A workpiece 2 is placed. For this reason, in the conventional walking beam heating furnace, the upper surface side of the fixed beam and the drive beam on which the heat-treated object 2 having a low temperature is placed contracts from the lower surface side, so that these beams move upward between both ends. It will deform to warp.

  For this reason, the beams 3X and 4X positioned closest to the introduction port 48a of the walking beam type conveying apparatus 1 of the present embodiment are formed such that the cross-sectional strength at both ends in the furnace length direction (conveying direction) is higher than the cross-sectional strength at the center side. Has been.

  As shown in FIG. 4, the beams 3 </ b> X and 4 </ b> X made of a section steel (in this case, I-type steel) are provided with a web 11 vertically between, for example, flanges 10 that are opposed to each other with an interval in the vertical direction. The upper surfaces 12 of the beams 3X and 4X are flat surfaces, and both end portions are formed such that the gap between the upper and lower flanges 10 is wider than the center side. The webs 11 at both ends are formed with a long dimension below the center side, and the lower sides of the beams 3X and 4X have an arch shape so that the cross-sectional strength at both ends is higher than the cross-sectional strength at the center side. That is, the beams 3X and 4X are formed such that the thickness T1 at both ends is greater than the thickness T2 at the center.

  In addition to the beams 3X and 4X of the walking beam type conveying apparatus 1, other drive beams 3Y and fixed beams 4Y (hereinafter simply referred to as “other beams 3Y and 4Y”) are also formed of a shape steel. The other beams 3Y and 4Y other than the beams 3X and 4X are shown in FIG. 5 so that the center side does not bend and bend even when a heavy heat-treated object 2 is placed while maintaining a high temperature in the heating furnace. As shown, the center side is formed such that the gap between the upper and lower flanges 13 is wider than both ends. In the other beams 3Y and 4Y, the upper surface 15 is a flat surface, the central web 14 is formed deeper below both ends, and the thickness T3 on the center side of the beams 3Y and 4Y is at both ends. It is formed thicker than thickness T4.

  Further, the thickness T2 on the center side of the beams 3X and 4X is the same as the thickness T3 on the center side of the other beams 3Y and 4Y.

  According to the walking beam type conveying apparatus 1 of the present embodiment, the positions P1 of the lower surfaces 16 at both ends in the furnace length direction of the beams 3X and 4X are lower than the position P2 of the lower surface 16 at the center, so to speak, the lower surface 16 Since the upper surface 12 is cooled by the object to be heat treated 2, the beams 3X and 4X can release the force acting downward to try to shrink, and the both end sides warp upward. Deformation can be suppressed.

  In the above-described embodiment, an example in which the lower surface 16 of each of the beams 3X and 4X is formed in an arch shape has been described, but this is not limiting, and only one of them may have an arch shape. Further, the arched beam is not limited to the beams 3X and 4X, and may be a plurality of beams 3X and 4X that continue from the introduction port 48a side, for example, two or three from the introduction port 48a side. .

  A method of specifying a beam in a zone generally called pre-tropical zone is also conceivable.

  Further, the shape of the beams 3X and 4X is referred to as an arch shape, but it is sufficient that the position P1 of the lower surface 16 at both ends is lower than the position P2 of the lower surface 16 at the center, and the form of the lower surface 16 of the section. Is not limited to a curved line, and may be linear or convex downward.

  Further, if the upper surface 12 is flat, the web 11 connecting the lower surface 16 has dimensions that are longer at both ends than at the center, so that the cross-sectional strength at both ends is greater than the cross-sectional strength at the center. growing.

  Further, the beams 3X and 4X having high cross-sectional strengths at both ends can be obtained, for example, by setting the thickness T2 on the center side to be equal to or greater than the thickness T4 on the center side of the other beams 3Y and 4Y. Since the center side in the furnace length direction has the same or higher cross-sectional strength as the center side of the other beams 3Y, 4Y, even if the beams 3X, 4X, the heat-treated object 2 having a large weight is mounted. Even if it is placed and operated for a long time, it is possible to prevent the center side in the furnace length direction from being bent so as to warp downward.

  In addition, the beams 3X and 4X have a flat upper surface 12, and at both ends, the gap between the upper and lower flanges 10 is wider than the center side, and the web 11 is deeply formed downward to increase the cross-sectional strength. High cross-sectional strength can be provided while flattening the surface on which the heat-treated product 2 is placed.

  Moreover, although the said embodiment demonstrated the example which formed the web 11 deeply in the both ends of beam 3X, 4X from the center side, and raised cross-sectional strength, it does not restrict to this. For example, the cross-sectional strength may be increased by increasing the thickness of the flange 10 and the web 11, or by providing a rib that is orthogonal to the flange 10 and the web 11 and that connects the flange 10 and the web 11. .

  Further, in the other beams 3Y and 4Y, the upper surface 15 forms a flat surface, and at the center side, the distance between the upper and lower flanges 13 is wider than both ends, that is, the web 14 is formed with a deep dimension. By long-term operation, it is possible to prevent the beams 3Y and 4Y from bending so that the center side in the furnace length direction warps downward.

  FIG. 7 shows a modification of the embodiment shown in FIG. In FIG. 4, the case where the position P1 of the lower surface of both ends in the furnace length direction of the inlet side beams 3X, 4X is set lower than the position P2 of the lower surface of the central part has been described. Reference numerals 3X and 4X denote a single beam positioned closest to the introduction port 48a where the workpiece 2 immediately after introduction is placed first, and the workpiece 2 having the lowest temperature immediately after introduction is placed. Only the one end portion on the introduction port 48a side in the furnace length direction of the beam is configured such that the lower surface position P1 is lower than the lower surface position P2 of the central portion.

  In other words, the other end of the single beam 3X, 4X located on the introduction port 48a side opposite to the introduction port 48a side is configured similarly to the end portions of the other beams 3Y, 4Y.

  Even in this modification, the upper surface of the single inlet side beam 3X, 4X is flat, and one end portion on the side of the inlet 48a in the furnace length direction is thicker than the center side downward. The projecting configuration, the configuration where the cross-sectional strength of the one end portion on the inlet 48a side in the furnace length direction is larger than the cross-sectional strength of the central portion, and the cross-sectional strength of the central portion of the single inlet-side beam 3X, 4X are introduced. It is possible to adopt a configuration that is equal to or higher than the cross-sectional intensity of the central portion of the other beams 3Y and 4Y other than the mouth side beams 3X and 4X. Even in such a modification, it is a matter of course that the same operational effects as those of the above-described embodiment can be obtained.

  In the above embodiment, the example in which the other beams 3Y and 4Y are made of I-shaped steel has been described. However, the present invention is not limited to this. For example, in the other beams 3Y and 4Y, the distance between the upper and lower flanges 13 is in the furnace length direction. It may be a uniform shape steel or square pipe steel.

  A method of remodeling the conventional walking beam type conveying apparatus to the walking beam type conveying apparatus 1 of the present embodiment that can prevent the both end portions of the beams 3X and 4X from warping upward on the introduction port 48a side is as follows. Of the beams 3X, 4X, 3Y, 4Y provided in the conventional walking beam type transfer device, the inlet side beam arranged on the inlet 48a side is located at the center P at the position P1 on the lower surface of both ends in the furnace length direction. The beam is replaced with a modification beam 3X, 4X lower than the position P2 on the lower surface. For example, the beam arranged closest to the introduction port 48a is replaced with remodeling beams 3X and 4X in which the cross-sectional strength at both ends is higher than the cross-sectional strength at the center side.

  In the case of the modified example of FIG. 7, the introduction side beam is the beam located closest to the introduction port 48 a, and the position P 1 of the lower surface of only one end portion on the introduction port 48 a side in the furnace length direction is the beam. The beam is replaced with a modification beam 3X, 4X lower than the position P2 on the lower surface of the central portion.

  Thereby, the conventional walking beam type conveying apparatus can be easily modified to the walking beam type conveying apparatus 1 of the present embodiment.

  In the above-described embodiment, an example in which only the lower surfaces of the beams 3X and 4X are arched has been described. For example, in these beams 3X and 4X, the distance between the upper and lower flanges 10 is uniform in the furnace length direction. As shown in FIG. 6, it may be a shape steel (curmber shape) that is curved so that the center side protrudes upward. In this case, since the upper surface on which the workpiece 2 is placed is curved, a plurality of riders 17 are provided on the upper surfaces of the beams 3X ′ and 4X ′, and a flat plane is formed on the upper surfaces of the plurality of riders 17. May be formed.

  Moreover, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Walking beam type conveying apparatus 2 Material to be heat-treated 3 Drive beam 3X, 3X ′ Drive beam 3Y located on the most inlet side 3Y Other drive beam 4 Fixed beam 4X, 4X ′ Fixed beam 4Y located on the most inlet side 4Y Other Fixed beam 5 Post 10 Flange 11 Web 12 Upper surface 13 Flange 14 Web 15 Upper surface
16 lower surface 17 rider 30 hearth 30a penetrating part 31 furnace wall 32 furnace ceiling 33 furnace body 34 digging part 34a floor surface 35 mounting floor surface 38 first driving device 38a telescopic rod 39 elevating member 40 tilt guide portion 41 actuating frame 42 Upper roller 43 Lower roller 44 Second drive device 44a Telescopic rod 45 Drive frame 48 Door 48a Inlet port 49 Door 49a Extraction port P1 Position of the lower surface of both ends (one end) of the beam P2 Position of the lower surface of the central portion of the beam T1 Thickness at both ends (one end) of the beam T2 Thickness at the center of the beam T3 Thickness at both ends of the other beam T4 Thickness at the center of the other beam

Claims (5)

A plurality of beams on which a material to be heat-treated introduced from the introduction port is placed are connected along the furnace length direction, and each of the beams comprises a movable beam that is movable and a fixed beam that is fixed. Type transport device,
About at least one of the moving beam and the fixed beam supported at both ends by a support column, among the plurality of beams continuous along the furnace length direction, the inlet side beam positioned closest to the inlet side furnace length definitive direction, walking beam type conveying apparatus underside position of the one end portion only of the conductor inlet side is being lower than the position of the lower surface of the central portion. The inlet side beams, the upper surface is flat, claim 1 thereof furnace length definitive direction, only one end portion of the inlet side, characterized in that the thickness from its center side protrudes thicker downwardly The walking beam type conveying apparatus described in 1. The inlet side beam definitive the furnace length direction, wherein the conveying device of the walking beam according to claim 2, cross-sectional intensity of the one end portion only of the inlet side being greater than the cross-sectional intensity of the central portion .   4. The walking beam type according to claim 3, wherein the cross-sectional strength of the central portion of the inlet side beam is equal to or higher than the cross-sectional strength of the central portion of the beam other than the inlet side beam. Conveying device. A plurality of beams on which a material to be heat-treated introduced from the introduction port is placed are connected along the furnace length direction, and each of the beams comprises a movable beam that is movable and a fixed beam that is fixed. A method of remodeling the type transport device,
For at least either one of the moving beam and the fixed beam, of the plurality of the beam continuing along the furnace length direction, the inlet side beams located closest to the inlet side, definitive the furnace length direction A method for remodeling a walking beam type conveying apparatus, characterized in that the position of the lower surface of only one end portion on the inlet side is replaced with a remodeling beam lower than the position of the lower surface of the central portion.

Images