JP3687698B2 - Heat treatment method and apparatus for metal tube coil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat treatment method and apparatus for a metal tube coil made of copper, a copper alloy, aluminum, an aluminum alloy, or the like, and more particularly, a heat treatment method for a metal tube coil capable of removing residual oil attached to the metal tube of the metal tube coil. And an apparatus. In the present specification, metals and alloys are collectively referred to as metals. Pure copper and copper alloys are collectively referred to as copper, and pure aluminum and aluminum are collectively referred to as aluminum.
[0002]
[Prior art]
Conventionally, copper metal tube coils used in heat exchangers for air conditioners and refrigerators, as well as for building piping, etc., after ingot extrusion, rough drawing and finish drawing, and further winding finish to LWC (level wound) Coil), and this LWC is manufactured by heat treatment in a bright annealing furnace. The processing oil used for drawing, etc. remains in the LWC (the processing oil in the LWC is referred to as inner surface residual oil). If the inner surface residual oil is left as it is, the heat exchanger is manufactured, etc. In order to adversely affect the process, it is necessary to remove this inner surface residual oil.
[0003]
FIG. 12 is a schematic view showing a bright annealing furnace. As shown in FIG. 12, the bright annealing furnace is composed of an inlet side vestable 25a, a heating zone 26, a cooling zone 27, and an outlet side vestable 25b. The entry side bestable 25 a is a room that prevents the atmosphere from entering the heating zone 26, and the exit side bestable 25 b is a room that prevents the atmosphere from entering the cooling zone 27. Further, an entrance table 28a is installed at the entrance of the entry side best 25a, while an exit table 28b is installed at the exit of the exit side best 25b. The LWC 61 is first placed on the entry table 28a. Next, the LWC 61 is annealed in the heating zone 26 after passing through the inlet side vestable 25a, further cooled in the cooling zone 27, then passed through the outlet side vestable 25b, and sent out of the bright annealing furnace. The sent LWC 61 is placed on the delivery table 28b. The purge gas is supplied to the LWC 61 at the inlet side table 28 a, the heating zone 26, the cooling zone 27 and / or the outlet side table 28 b, and the residual oil in the inner surface of the metal tube of the LWC 61 is removed out of the LWC 61.
[0004]
First, the first prior art will be described (Japanese Patent Laid-Open No. 7-197263). FIG. 13 is a schematic diagram showing a metal tube coil heat treatment apparatus in the first prior art. As shown in FIG. 13, the cooling zone 27 is covered with a heat insulating material 65, and a roller 74 is installed in the lower part. The LWC 61 is placed on the roller 74 via the tray 75, and the LWC 61 can move on the roller 74. A gas receiving member 91 is provided at the end of the tray 75, and one end 61 a of the LWC 61 is connected to the gas receiving member 91. On the other hand, the other end 61b of the LWC 61 remains released. A gas port member 93 is provided on the inner surface of the heat insulating material 65, and the upper portion of the gas port member 93 is connected to the purge gas supply 55 via the expansion / contraction member 53 and the conduit 34. A cylinder rod 92 and a cylinder 43 are arranged in the horizontal direction of the gas inlet member 93, and the cylinder 43 is fixed to the outer surface of the heat insulating material 65 by a fixing member 43a. The gas feeding member 93 is connected to the cylinder 43 via the cylinder rod 92. With this cylinder 43, the gas port member 93 can be advanced and retracted via the cylinder rod 92 and can be closely attached to and detached from the gas light receiving member 91.
[0005]
In the cooling zone 27 configured as described above, the LWC 61 is heated by the heating zone 26, moves on the roller 74, and is fed into the cooling zone 27. When the position of the gas inlet member 91 becomes substantially the same as the position of the gas inlet member 93 with respect to the traveling direction of the LWC 61, the cylinder 43 is operated and the gas inlet member 93 is moved via the cylinder rod 92. The gas inlet member 91 is pressed to communicate the purge gas supplier 55 and the LWC 61 via the conduit 34, the expansion / contraction member 53, the gas inlet member 93, and the gas inlet member 91. Next, the purge gas is supplied from the purge gas supply unit 55 to the LWC 61. Since the LWC 61 is heated in advance and has a high temperature, the residual oil on the inner surface is vaporized. Therefore, when the purge gas is pumped into the LWC 61, the residual oil on the inner surface is discharged into the cooling zone 27 from the other end 61b of the LWC 61 together with the purge gas. After the purge in the LWC 61 is completely completed, the gas inlet member 93 is separated from the gas inlet member 91, and the LWC 61 moves on the roller 74 and passes through the outlet side vestable 25b, and then moves to the outlet table 28b. Reach and rest on this table.
[0006]
Next, the second prior art will be described (Japanese Patent Laid-Open No. 7-150376). FIG. 14 is a schematic diagram showing a conventional metal tube coil heat treatment apparatus. 14, the same components as those in FIG. 13 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 14, the gas receiving member 31 is provided at the end of the tray 75 opposite to the gas receiving port 91, and the other end 61 b of the LWC 61 is connected to the gas receiving member 31. It is connected. A gas port member 31 is disposed on the inner side surface of the heat insulating material 65 in the vicinity of the gas port member, and the upper portion of the gas port member 33 is connected to the conduit 35 via an extendable member 53. Thus, when the purge gas is discharged from the other end 61b, the gas is discharged to the outside via the gas receiving member 31, the gas feeding member 33, the expansion / contraction member 54 and the conduit 35. A cylinder rod 42 and a cylinder 44 are disposed in the horizontal direction of the gas inlet member 93, and the cylinder 44 is fixed to the outer surface of the heat insulating material 65 by a fixing member 44a. The gas inlet member 93 is connected to the cylinder 44 via the cylinder rod 42. With this cylinder 44, the gas port member 33 can be moved in the horizontal direction via the cylinder rod 42, so that the gas port member 33 is in close contact with the gas port member 31.
[0007]
In the cooling zone 27 configured as described above, the LWC 61 is heated by the heating zone 26, moves on the roller 74, and is fed into the cooling zone 27. When the positions of the gas inlet members 91 and 31 are substantially the same as the positions of the gas outlet members 93 and 33 with respect to the traveling direction of the LWC 61, the cylinders 43 and 44 are operated and the gas outlet member 93 is operated. Is pressed against the gas receiving member 91 via the cylinder rod 92, and the gas feeding member 33 is pressed against the gas receiving member 33 via the cylinder rod 42. Accordingly, the purge gas supply device 55 communicates with the one end 61a of the LWC 61 via the conduit 34, the expansion / contraction member 53, the gas feeding member 93, and the gas receiving member 91, and the other end 61b of the LWC 61 is connected to the gas receiving member. 31, communicates with the conduit 35 through the gas feed member 33 and the expansion / contraction member 54. Next, the purge gas is supplied from the purge gas supply unit 55 to the LWC 61. Since the LWC 61 is heated in advance and has a high temperature, the inner surface residual oil is vaporized. For this reason, when the purge gas is pumped from the purge gas supply device 55 into the LWC 61, the residual oil on the inner surface is pushed out together with the purge gas from the other end 61 b of the LWC 61, passes through the conduit 35, and is discharged out of the cooling zone 27. After the purge in the LWC 61 is completely completed, the gas port member 93 is separated from the gas port member 91 and the gas port member 33 is separated from the gas port member 33. The LWC 61 moves on the roller 74, passes through the outlet side best 25b, reaches the outlet table 28b, and is placed on the table 28b.
[0008]
[Problems to be solved by the invention]
However, the above-described conventional techniques have the following problems. That is, in the first conventional method, as indicated by the arrow in FIG. 13, the exhaust gas is discharged from the other end 61b and fills the cooling zone 27 and the like. Further, since residual oil (this residual oil is referred to as external residual oil) adheres to the outer surface of the metal tube of the LWC 61, the outer surface residual oil similarly fills the inside of the cooling zone 27. The outer surface residual oil and the inner surface residual oil in the exhaust gas are recondensed, contaminating the inner wall of the cooling zone 27 and reattaching to the outer surface of the metal tube of the LWC 61. For this reason, when the 1st conventional method is applied to heating zone 26, the thermal efficiency of heating zone 26 falls. Since this residual oil contains impurities, a contact potential difference is generated between the impurities and the outer surface of the metal tube, thereby causing discoloration on the outer surface of the metal tube and corrosion.
[0009]
In the second conventional method, the other end 61b of the LWC 61 is connected to the conduit 35 via the gas receiving member 31, the gas feeding member 33, and the expansion / contraction member 54, so that the exhaust gas is discharged from the other end 61b. This gas does not fill the cooling zone 27. For this reason, the inner wall of the cooling zone 27 is not contaminated by the inner surface residual oil, and the inner surface residual oil does not adhere to the metal tube outer surface of the LWC 61. However, since the outer surface residual oil remains on the outer surface of the metal pipe of the LWC 61, the residual oil is vaporized and fills the cooling zone 27, and the inner wall of the cooling zone 27 adheres to the outer surface of the LWC 61. .
[0010]
Further, when the other end 61b of the LWC 61 is connected to the gas receiving member 31, this operation is usually performed manually. As shown in FIG. 13, the other end 61b of the LWC 61 exists in the vicinity of the bottom of the hollow shaft portion of the LWC 61. After the other end 61b is pulled out above the LWC 61, the other end 61b as shown in FIG. Is connected to the gas receiving member 31. The outer diameter D of the LWC 61 is usually about 1300 mm, and the inner diameter (diameter of the hollow shaft portion) d is about 560 mm. Since the outer diameter D is large in this way, when the other end 61b is manually removed from the bottom of the hollow shaft portion of the LWC 61, an unreasonable posture is forced. For this reason, there is a problem that work efficiency is lowered and the posture is unstable, resulting in severe labor.
[0011]
This invention is made | formed in view of this problem, Comprising: Residual oil in the metal tube of a metal tube coil can be removed, preventing residual oil from reattaching to the metal tube of a metal tube coil. It aims at providing the heat processing method and apparatus of a metal tube coil.
[0012]
[Means for Solving the Problems]
  According to the first invention of the present applicationThe metal tube coil heat treatment methodA metal tube coil in which one end of the metal tube is on the outer surface side and the other end of the metal tube is on the hollow shaft side is disposed at a predetermined position, and a purge gas supplier is connected to one end of the metal tube. A purge gas is supplied from one end of the metal tube into the metal tube to purge residual oil in the metal tube, and one end of the hollow shaft portion of the metal tube coil is covered with a suction device, and from the other end of the metal tube The discharged purge gas is sucked by the suction device.
[0014]
  Also, with the suction deviceSaidThe gas around the metal tube coilThis metal tube coilThe other end of the hollow shaftPartEtInside the hollow shaftIt can be sucked into the air.
[0015]
  According to the second invention of the present applicationThe metal tube coil heat treatment methodMetal tubeOne end of theis thereWithMetal pipeThe other end of theis thereThe metal tube coil is placed at a predetermined position, and the hollow shaft portion of this metal tube coilOneAfter covering the other end with a suction device and the other end with a contact member,With purge gas supplyThe hollow shaft portion is sucked by the suction device while supplying a purge gas around the metal tube coil.
[0016]
The purge gas is preferably pressurized.
[0017]
  In addition,Metal tubeConnect another purge gas supply to one endMoneyA purge gas may be supplied into the metal tube.
[0018]
  According to the third invention of the present applicationMetal tube coil heat treatment equipmentMetal tubeOne end of theis thereWithMetal pipeThe other end of theis thereA metal tube coil heat treatment apparatus for removing residual oil from a metal tube coil,Metal tubeClose to one end of theMetal tubeOne end ofFrom inside the metal pipeA purge gas supplier for supplying a purge gas to the metal pipe coil,Metal tubeFrom the other endOf the metal tube coilAnd a suction device for sucking the purge gas discharged to the hollow shaft portion.
[0019]
  The metal tube coil is disposed so that its axis is perpendicular to the ground, and the suction device is disposed above the metal tube coil. When the suction device is lowered and raised, the metal tube coil is disposed above the hollow shaft portion.This suction deviceIt may be closely spaced.
[0020]
A closing member may be disposed below the hollow shaft portion.
[0021]
  The metal tube coil is disposed such that its axis is perpendicular to the ground, and the suction device is disposed below the metal tube coil, and the suction device moves up and down to lower the hollow shaft portion.This suction deviceIt may be closely spaced.
[0022]
A blocking member may be disposed on the hollow shaft portion.
[0023]
  According to the fourth invention of the present applicationMetal tube coil heat treatment equipmentMetal tubeOne end of theis thereWithMetal pipeThe other end of theis thereA metal tube coil heat treatment apparatus for removing residual oil from a metal tube coil, a purge gas supply device for supplying a purge gas around the metal tube coil, an axial direction of the metal tube coil, and the hollow shaft portion It has a suction device closely contacting and separating at one end, and a contact member disposed in the axial direction of the metal tube coil and closely contacting and separating from the other end of the hollow shaft.
[0024]
  The metalTubeConnected to one end and purge gas forwardMoneyThere may be other purge gas feeders that feed into the generic tube.
[0025]
The metal tube coil may be disposed so that an axis thereof is perpendicular to the ground, the suction device may be disposed below the metal tube coil, and the contact member may be disposed above the metal tube coil.
[0026]
  When the suction device is disposed below the metal tube coil, the tray on which the metal tube coil is placed and the tray and the metal tube coil are in close contact with each other and are softer than the metal tube coil. A soft plate, and at the center of this soft plateIsThe metal tube coilHollow shaftAnd a through hole that communicates with the suction device may be formed.
[0027]
The hollow shaft portion refers to a hollow portion near the axis of the metal tube coil, and the outer surface refers to the surface portion of the metal tube coil excluding the hollow shaft portion described above. The external space means the outside of the metal tube of the metal tube coil. Therefore, since the hollow shaft portion described above is outside the metal tube, it is a part of the external space.
[0028]
  In the heat treatment method for a metal tube coil according to claim 1, the metalTubeFrom one endthisPurge gas is supplied into the metal tube. Then, since the inner surface residual oil is vaporized in the metal pipe, the residual oil is pushed out to the purge gas, and the metal together with the purge gas.TubeIt is discharged from the other end to the external space. The discharged purge gas (hereinafter referred to as exhaust gas) is sucked by a suction device. Although the exhaust gas contains the inner surface residual oil, it is sucked by the suction device, so that the exhaust gas does not diffuse around the metal tube coil, and the inner surface residual oil in the exhaust gas is not in the metal tube coil. It does not adhere to the outer surface of the metal tube. Also, when heat treatment of the metal tube coil is performed in the heating zone or cooling zone of the bright annealing furnace in order to suck the exhaust gas, the internal residual oil in the exhaust gas adheres to the furnace wall or the like in the heating zone or cooling zone. Can be prevented.
[0029]
In the present invention, a suction device is installed in the vicinity of the metal tube coil to suck exhaust gas. For this reason, it is not necessary to manually connect the suction device to the other end of the metal tube, thereby improving productivity and saving labor.
[0030]
  metalTubeone endIs goldOn the outer surface side of the tube coilis thereWithOf this metal tubeThe other end is on the hollow shaft side of the metal tube coilis thereThe metal tube coil is placed at a predetermined position, and the hollow shaft portion of this metal tube coilOneWhen the end of the other side is covered with a suction device for suction, the suction efficiency is further increased.
[0031]
Since the above-described suction device is installed at the end of the hollow shaft, gas other than exhaust gas, for example, ambient gas existing around the metal tube coil, is sucked from the other end of the hollow shaft. Can do. For example, in the heating zone of a bright annealing furnace, the residual oil on the outer surface of the metal tube coil is vaporized and floats in the heating zone, and if left as it is, it causes contamination in the heating zone. If it condenses and reattaches to the outer surface of the metal tube of the metal tube coil, it causes discoloration of the metal tube. Therefore, by sucking the gas present around the metal tube coil from the other end side of the hollow shaft portion, it is possible to prevent the inside of the furnace such as the heating zone from being contaminated. Further, it is possible to prevent the outer surface residual oil from reattaching to the metal tube coil and causing discoloration and corrosion on the outer surface.
[0032]
  Claim3In the metal tube coil heat treatment method according toTubeone endIs goldOn the outer surface side of the tube coilis thereIn addition, the other end is on the hollow shaft side of the metal tube coilis thereA metal tube coil is arranged at a predetermined position. Hollow shaft part of this metal tube coilOneWhile covering the end of one side with a suction deviceOf this hollow shaftThe other end is covered with a contact member. Since both ends of the hollow shaft portion are covered, the hollow shaft portion is sealed. Next, the hollow shaft portion is sucked by the suction device while supplying the purge gas around the metal tube coil. As a result, the hollow shaft is close to a vacuum state, so metalTubeA pressure difference occurs between the other end and one end. Metal for thisTubePurge gas is drawn from one end and discharged from the other end. This makes the metalIn the jurisdictionThe inner surface residual oil is removed. Further, since the hollow shaft portion is in a substantially vacuum state, purge gas enters through the gap between the metal tubes of the metal tube coil and reaches the hollow shaft portion. Although air exists in the gap between the metal tubes, the air is purged by the purge gas, so that the metal tube can be prevented from being oxidized and discolored by the air. Furthermore, vaporized outer surface residual oil exists outside the metal tube coil. Since the outer surface residual oil reaches the hollow shaft portion through the gap between the metal tubes, the outer surface residual oil can be removed. As a result, the residual oil on the outer surface can be prevented from condensing and reattaching to the outer surface of the metal tube, and when the heat treatment method is applied to a heating zone and / or a cooling zone, the furnace wall is contaminated by the residual oil on the outer surface. Can be prevented.
[0033]
  The purge gas is preferably supplied at a high pressure. For example, 6 to 7 kg / cm²It is preferable to supply at a pressure of As a result, when this heat treatment method is applied to a heating zone and / or a cooling zone, the purge gas is further reduced to a metal.TubeIt becomes easy to enter the metal tube from one end, and the purge gas easily escapes through the gap between the metal tubes. In addition, depending on the type of metal tube coil, some metal tubes have a total length of several kilometers.TubeWhen purge gas is supplied from one end, pressure loss occurs in the metal tube, and it is difficult to discharge the purge gas from the other end. In this case, metalTubeConnect another purge gas supply to one endThe goldYou may supply in a genus tube. Thereby, the inner surface residual oil in the metal tube can be further removed.
[0034]
  Claim6In the metal tube coil heat treatment apparatus according toTubeone endIs goldOn the outer surface side of the tube coilis thereIn addition, the other end is on the hollow shaft side of the metal tube coilis thereA metal tube coil is arranged at a predetermined position. Next, metalTubeA purge gas supplier is closely connected to one end, and a suction device is disposed at the end of the hollow shaft portion. Purge gas from purge gas supplyTubeThe liquid is supplied to one end, discharged from the other end to the hollow shaft portion, and the hollow shaft portion is sucked by the suction device. Then, since the inner surface residual oil is vaporized in the metal pipe, the residual oil is pushed out to the purge gas, and the metal together with the purge gas.TubeIt is discharged from the other end. Although the exhaust gas contains residual oil on the inner surface, the exhaust gas is sucked by the suction device, so that the exhaust gas does not diffuse around the metal tube coil. For this reason, the inner surface residual oil in the exhaust gas does not adhere to the outer surface of the metal tube of the metal tube coil. In addition, when the heat treatment of the metal tube coil is performed in the heating zone and / or the cooling zone of the bright annealing furnace in order to suck the exhaust gas, the internal residual oil in the exhaust gas adheres to the furnace wall and becomes contaminated. This can be prevented. Furthermore, since the gas existing around the metal tube coil is sucked by the suction device, it is possible to prevent the residual oil on the outer surface from reattaching to the metal tube coil and causing discoloration and corrosion on the outer surface.
[0035]
The arrangement of the metal tube coil is not particularly limited, but is generally arranged such that the axis of the metal tube coil is perpendicular to the ground. In this case, the above-described suction device is disposed above the metal tube coil, the suction device is lowered during the heat treatment, and is brought into close contact with the upper portion of the hollow shaft portion of the metal tube coil. Good. If it does so, since the upper part of a hollow shaft part and the suction device have adhered, suction efficiency will improve. After the completion of the suction, the suction device is lifted away from the hollow shaft portion of the metal tube coil, and the metal tube coil is moved. In addition, when installing this apparatus, such as the entrance table of a bright annealing furnace, outside a furnace, you may obstruct | occlude the lower part of a hollow shaft part with a closure member. Thereby, the atmosphere etc. outside a metal pipe coil can prevent entering a hollow shaft part.
[0036]
In addition, when the metal tube coil is arranged so that its axis is perpendicular to the ground, the above-described suction device is placed below the metal tube coil, and the suction device is raised during the heat treatment, so that the metal tube coil It may be brought into close contact with the lower portion of the hollow shaft portion and sucked as described above. Thereby, suction efficiency can be raised. In addition, when installing this apparatus, such as the entrance table of a bright annealing furnace, outside a furnace, you may obstruct | occlude the upper part of a hollow shaft part with a closure member. Thereby, the atmosphere etc. outside a metal pipe coil can prevent entering a hollow shaft part.
[0037]
  Claim11In the metal tube coil heat treatment apparatus according toTubeone endIs goldOn the outer surface side of the tube coilis thereIn addition, the other end is on the hollow shaft side of the metal tube coilis thereA metal tube coil is arranged at a predetermined position. Next, the suction device is brought into close contact with one end portion of the hollow shaft portion of the metal tube coil, and the close contact member is brought into close contact with the other end portion of the hollow shaft portion of the metal tube coil. Next, the hollow shaft portion is sucked by the suction device while supplying the purge gas around the metal tube coil. Then the claim3As with the metal tube coil heat treatment method according to the present invention, the hollow shaft portion is in a substantially vacuum state, and the metalTubeA pressure difference occurs between the other end and one end. For this reason, the purge gas enters from one end, and the inner surface residual oil in the metal tube of the metal tube coil is removed. Further, purge gas enters through the gap between the metal tubes of the metal tube coil, and the air in the gap between the metal tubes is removed. Further, vaporized outer surface residual oil exists outside the metal tube coil, but this outer surface residual oil also reaches the hollow shaft portion from the gap of the metal tube, so this outer surface residual oil is removed. As a result, it is possible to prevent the residual oil on the outer surface from condensing and reattaching to the outer surface of the metal tube, and when the heat treatment apparatus is installed in a heating zone and / or a cooling zone, the furnace wall is not It is possible to prevent contamination.
[0038]
The metal tube coil is usually arranged so that its axis is vertical. In this case, the suction device described above can be disposed below the metal tube coil, and the contact member can be disposed above the metal tube coil. Conversely, the suction device may be disposed above the metal tube coil, and the contact member may be disposed below the metal tube coil.
[0039]
  In addition, as described above, when the total length of the metal tube of the metal tube coil is long and the pressure loss of the purge gas is large, the metal tubeTubeAnother purge gas supply device may be connected to one end to supply the purge gas into the metal tube of the metal tube coil. Thereby, the inner surface residual oil in the metal tube can be further removed.
[0040]
In addition, since the metal tube coil is usually placed on the tray and moves, a gap is easily formed between the metal tube coil and the tray. When such a gap exists, gas enters the hollow shaft portion from this gap, and the hollow shaft portion is not in a vacuum state. For this reason, it becomes difficult to suck the purge gas from one end of the metal tube coil, and it becomes difficult for the purge gas to enter the gap between the metal tubes. In such a case, a soft plate is disposed between the tray and the metal tube coil, and the tray and the metal tube coil are brought into close contact with each other via the soft plate. A through hole is provided in the central portion of the soft plate in order to connect the hollow shaft portion of the metal tube coil and the suction device. Further, it is assumed that the soft plate is softer than the metal tube coil so that the soft plate does not catch the metal tube coil.
[0041]
Examples of the material of the metal tube coil in the present invention include copper or a copper alloy, aluminum or an aluminum alloy, and the like.
[0042]
Moreover, the heat processing method of the metal tube coil of this invention can be applied to the entrance table, exit table, heating zone, cooling zone, etc. of a bright annealing furnace. In particular, it is preferable to carry out in this processing chamber by covering the entry table to form a processing chamber.
[0043]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic view showing a heat treatment apparatus for a metal tube coil according to a first embodiment of the present invention. 1, the same components as those in FIG. 13 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 1, a cylindrical suction member 1 is disposed at the upper central portion of the cooling zone 27, and a through hole 1 a is formed in the suction member 1. Above the through hole 1a, the telescopic tube 2 is fixed in close contact with the upper surface of the suction member 1. The telescopic tube 2 is connected to the conduit 4 a via the fixing member 3. The conduit 4a passes through the upper wall portion 65a of the heat insulating material 65, reaches the outside of the cooling zone 27, and is connected to the blower 6 through the valve 5a and the conduit 4b. The suction member 1, the fixing member 3, the conduit 4 a, the valve 5 a and the blower 6 constitute a suction device. When the blower 6 of the suction device is operated, gas is sucked from below the suction member 1, and this gas passes through the telescopic tube 2 and the conduit 4 a to reach the blower 6. The blower 6 is connected to a recovery device (not shown) through a conduit 4c, a valve 5b, and a conduit 4d. The recovery device separates the residual oil and the purge gas, and the purge gas can be reused. Two cylinders 11 are fixed to the outer surface of the upper wall portion 65 a of the heat insulating material 65 via the fixing member 10. A cylinder rod 9 extends downward from each cylinder 11, and the cylinder rod 9 passes through the upper wall portion 65 a and reaches the suction member 1. The tip 9 a of the cylinder rod 9 and the outer peripheral portion 7 of the suction member 1 are fixed via a fixing member 8. By operating the cylinder 11, the cylinder rod 9 is raised and lowered, and the suction member 1 is raised and lowered. Thereby, the suction member 1 can be brought into close contact with the upper portion 12 of the hollow shaft portion of the LWC 61, and the suction member 1 can be separated from the upper portion 12 of the hollow shaft portion after the completion of the suction.
[0044]
In the metal tube heat treatment apparatus configured as described above, first, the LWC 61 is fed to the cooling zone 27, and the position of the gas inlet member 91 is equal to the position of the gas inlet member 93 with respect to the traveling direction of the LWC 61. LWC61 is arrange | positioned so that it may become. Next, as shown in FIG. 2, the cylinder 43 is operated, and the gas feeding member 93 is brought into close contact with the gas receiving member 91 through the cylinder rod 92. Further, the cylinder 11 is operated, the suction member 1 is lowered through the cylinder rod 9, and the suction member 1 is brought into close contact with the upper portion 12 of the hollow shaft portion of the LWC 61. Next, after releasing the valves 5a and 5b, the blower 6 is operated, and the purge gas is supplied from the purge gas supply device 55 via the conduit 34, the expansion / contraction member 53, the gas inlet member 93, and the gas inlet member 91. Supply into the metal tube. Then, since the inner surface residual oil is vaporized in the metal pipe of the LWC 61, it is discharged together with the purge gas from the other end 61b of the LWC 61. As shown by an arrow 103 in the figure, the exhaust gas rises in the suction member 1, the telescopic tube 2 and the conduit 4 a and is sucked into the blower 6. Further, vaporized outer surface residual oil exists in the cooling zone 27. The outer surface residual oil once descends to the lower side of the roller 74 as indicated by an arrow 101, and then rises toward the lower portion 12 a of the hollow shaft portion of the LWC 61 as indicated by an arrow 102. As shown, the inside of the telescopic tube 2 is lifted and sucked into the blower 6. After passing through the blower 6, the exhaust gas is supplied to a recovery device (not shown), and the purge gas in the exhaust gas is recovered. After the residual oil on the inner surface of the metal pipe of the LWC 61 is removed, the blower 6 and the purge gas supply unit 55 are stopped. Next, the gas feeding member 91 is separated from the gas receiving member 93 and the suction member 1 is separated from the upper portion 12 of the hollow shaft portion of the LWC 61. Next, the LWC 61 is sent out from the cooling zone 27.
[0045]
In this way, by collecting the outer surface residual oil in addition to the inner surface residual oil, it is possible to prevent the residual oil from reattaching to the inner wall of the cooling zone 27 and the outer surface of the metal tube of the LWC 61. Further, since it is not necessary to manually attach the other end 61b of the LWC 61 to the gas receiving member, work efficiency is improved.
[0046]
It should be noted that the suction member in the present embodiment is preferably as close as possible to improve the suction efficiency of the gas and exhaust gas in the cooling zone 27. FIG. 3 is a cross-sectional view showing another suction member. As shown in FIG. 3, a cylinder 2b is connected to the telescopic tube 2, and an abutting member 2c is fixed to the cylinder 2b. The cross section of the contact material 2c is annular, and the outer diameter of the lower end 2d of the contact material 2c is smaller than the diameter d of the hollow shaft portion of the LWC 61. By using such a suction member, the adhesion between the LWC 61 and the suction member can be improved.
[0047]
Further, in order to further enhance the suction efficiency of the gas and the exhaust gas in the cooling zone 27, another suction member may be used. FIG. 4 is a sectional view showing still another suction member. As shown in FIG. 4A, a cylinder 2e is connected to the distal end of the telescopic tube 2, and a pressing member 2f is inserted through the lower part of the cylinder 2e in a direction perpendicular to the axis of the cylinder 2e. Two contact members 2g are arranged on the inner surface of the cylinder 2e, and the upper part of each contact member 2g is fixed to the cylinder 2e by a support shaft 2h. The contact material 2g is a split-shaped member, and can rotate around the support shaft 2h by being pressed by the pressing member 2f. After such a contact material is inserted into the upper portion 12 of the hollow shaft portion of the LWC 61, as shown in FIG. 4B, the pressing member 2f is moved toward the outside in the radial direction of the cylinder 2e, and the contact material 2g Is closely attached to the upper portion 12 of the hollow shaft portion, and gas is sucked from the upper portion 12 of the hollow shaft portion. Since the upper portion 12 of the hollow shaft portion and the contact material 2g are firmly adhered, the suction efficiency becomes extremely high.
[0048]
In addition, the LWC 61 may be placed in a plurality of stages or horizontally. FIG. 5 is a schematic diagram showing LWCs 61 placed in a plurality of stages. 5, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 5, the tray 75a is provided with a lower step 75b, and a plurality of support rods 75d are provided perpendicularly to the lower step 75b at the periphery of the lower step 75b. An upper stage 75c is fixed to the upper end of the support bar 75d. The lower stage 75b and the upper stage 75c are parallel to each other.
[0049]
An LWC 61 is placed on each of the lower stage 75b and the upper stage 75c, and an annular seal member 88 is disposed between the LWC 61 of the lower stage 75b and the upper stage 75c. The sealing material 88 is fixed in close contact with the upper surface of the LWC 61 and the lower surface of the upper stage 75. Thus, by eliminating the gap between the upper stage 75c and the sealing material 88 and the gap between the sealing material 88 and the lower LWC 61, the gas in the cooling zone 27 is sucked as indicated by the arrow 104 in the figure. The gas discharged from the other end 61b can be sucked as indicated by an arrow 105 in the drawing.
[0050]
In addition, as shown in FIG. 6, when the LWC 61 is placed on the tray 75 so that its axis is horizontal, a cylinder (not shown) is provided on the side wall of the heat insulating material 95, and the cylinder rod of this cylinder is provided. By moving the suction member 1, the suction member 1 may be brought into close contact with the end 12b of the hollow shaft portion of the LWC 61. Thereby, the gas in the cooling zone 27 can be sucked as indicated by an arrow 104 in the drawing, and the gas discharged from the other end 61b can be sucked as indicated by an arrow 105 in the drawing.
[0051]
Next, a second embodiment of the present invention will be described. FIG. 7 is a schematic view showing a metal tube coil heat treatment apparatus according to the second embodiment of the present invention. 7, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 7, the cylinder 11 is fixed to the inner surface of the bottom surface portion 65b of the heat insulating material 65 via the fixing member 10 so as to be perpendicular to the bottom surface portion 65b. A cylinder rod 9 extends upward from the cylinder 11, and a tip 9 a of the cylinder rod 9 is fixed to the suction member 1 via a fixing member 8. At the center of the suction member 1, the telescopic tube 2 is fixed in close contact with the lower surface of the center of the suction member 1. A through hole 1a is formed at the center of the suction member 1, and the through hole 1a and the telescopic tube 2 communicate with each other. An annular plate 81 is disposed between the tray 75 and the lower surface of the LWC 61.
[0052]
FIG. 8 is a schematic view showing an annular plate. A through hole 82 is formed at the center of the annular plate 81, and a close contact portion 83 is formed at the outer periphery of the through hole 82. The through-hole 82 allows the hollow shaft portion of the LWC 61 to communicate with the suction member 1 via the tray 75. The inner diameter of the through hole 82 is substantially equal to the inner diameter d of the LWC coil, and the contact portion 83 is in close contact with the lower portion 12 a of the hollow shaft portion of the LWC 61. Support portions 84 are formed at four locations along the circumferential direction of the annular tray 81 on the outer side of the close contact portion 83, and vent holes 85 are formed between the support portions 84. The close contact portion 83 and the support portion 84 are members that support the LWC 61, and are formed of a soft material that is softer than the LWC 61 in order to prevent wrinkles from occurring on the lower surface of the LWC 61.
[0053]
In the metal tube heat treatment apparatus configured as described above, the cylinder 43 is operated and the gas inlet member 93 is brought into close contact with the gas inlet member 91 via the cylinder rod 92. Further, the cylinder 11 is operated, the suction member 1 is raised through the cylinder rod 9, and the suction member 1 is brought into close contact with the central portion of the tray 74 of the LWC 61. Next, after releasing the valves 5a and 5b, the blower 6 is operated, and the purge gas is supplied from the purge gas supply device 55 via the conduit 34, the expansion / contraction member 53, the gas inlet member 93, and the gas inlet member 91. Supply into the metal tube. Then, since the inner surface residual oil is vaporized in the metal pipe of the LWC 61, it is discharged together with the purge gas from the other end 61b of the LWC 61. The exhaust gas descends through the suction member 1 and the telescopic tube 2 as indicated by an arrow 106 in the figure, and is sucked into the blower 6 after passing through the conduit 4a. Further, vaporized outer surface residual oil exists in the cooling zone 27. The outer surface residual oil is sucked from the upper part 12 of the hollow shaft portion of the LWC 61 as shown by an arrow 107, passes through the telescopic tube 2 and the conduit 4 a, and is sucked into the blower 6.
[0054]
In this way, by collecting the outer surface residual oil in addition to the inner surface residual oil, the same effect as in the first embodiment shown in FIG. Since the suction member 1 does not directly contact, there is no possibility of wrinkles occurring in the LWC 61. In order to protect the LWC 61, the suction member 1 does not need to be an elastic body, so the structure of the suction member 1 is simple.
[0055]
In the second embodiment, gas can be sucked using the suction member shown in FIGS. Further, when the second embodiment is carried out outside the furnace, such as the exit side table 28b shown in FIG. 12, the upper portion 12 of the hollow shaft portion is closed with a closing member to prevent air from entering the hollow shaft portion. Good. Thereby, the inner surface residual oil in the metal tube of the LWC 61 can be further removed.
[0056]
Next, a third embodiment of the present invention will be described. FIG. 9 is a schematic view showing a metal tube coil heat treatment apparatus according to the third embodiment of the present invention. 9, the same components as those in FIGS. 1 and 7 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 9, a conduit 34 a is provided in the upper part of the cooling zone 27 and penetrates the heat insulating material 65 and is connected to the purge gas supply unit 55 a. A cylinder 53a is disposed on the outer surface of the center portion of the heat insulating material upper wall portion 65a, and the cylinder rod 51 of the cylinder 53a extends through the center portion of the upper wall portion 65a to the vicinity of the LWC 61. An adhesion plate (adhesion member) 54a is fixed to the lower end of the cylinder rod 51. The cylinder 53a presses the adhesion plate 54a against the upper portion 12 of the hollow shaft portion of the LWC 61 by the cylinder rod 51, and the upper portion of the hollow shaft portion. 12 prevents gas from entering.
[0057]
In the metal tube heat treatment apparatus configured as described above, the cylinder 11 is operated, the suction member 1 is raised via the cylinder rod 9, and the suction member 1 is brought into close contact with the central portion of the tray 74 of the LWC 61. Next, the cylinder 53a is operated, the contact plate 54a is lowered via the cylinder rod 9, and the contact plate 54a is brought into close contact with the outer periphery of the upper portion 12 of the hollow shaft portion of the LWC 61. Next, after releasing the valves 5a and 5b, the blower 6 is operated, and the purge gas is supplied from the purge gas supply unit 55a into the cooling zone 27 through the conduit 34a. In this case, the pressure of the purge gas is 6 to 7 kg / cm.²Pressurize with. Then, the purge gas enters the metal tube of the LWC 61 from the one end 61a of the LWC 61. Since the residual oil on the inner surface is vaporized in the metal pipe of the LWC 61, it is discharged together with the purge gas from the other end 61b of the LWC 61 to the outside. As shown by an arrow 106 in the figure, the exhaust gas descends in the suction member 1 and the telescopic tube 2, passes through the conduit 4 a, and is then sucked into the blower 6. Further, vaporized outer surface residual oil exists in the cooling zone 27. The outer surface residual oil is pressurized by the purge gas, passes through between the metal tubes of the LWC 61 and is sucked into the telescopic tube 2 as indicated by an arrow 108.
[0058]
FIG. 10 is a schematic diagram showing the metal tube of the LWC 61 in an enlarged manner. Since the metal tubes 71 are in close contact with each other, the air 72 is confined between the metal tubes 71. As the purge gas passes between the metal tubes 71 as indicated by the arrow 108, the air 72 remaining between the metal tubes 71 can be removed. In this way, the inner surface residual oil, the outer surface residual oil, the air, and the purge gas are sucked into the blower 6 through the expansion tube 2 and the conduit 4a.
[0059]
Thus, in addition to the same effects as those of the first and second embodiments, the purge gas rubs between the metal tubes 71, so that the air between the metal tubes 71 can be removed. Further, since it is not necessary to connect the one end 61a of the LWC 61 to the gas inlet member, productivity can be improved.
[0060]
In the above-described embodiment, the pressure of the purge gas is set to a relatively high pressure, but the pressure of the purge gas is not set to a particularly high value, and the suction force of the blower 6 is increased so that the residual oil on the inner surface and the residual oil on the outer surface are Oil, air and purge gas may be drawn.
[0061]
Next, a fourth embodiment of the present invention will be described. FIG. 11 is a schematic view showing a metal tube coil heat treatment apparatus according to the fourth embodiment of the present invention. 11, the same components as those in FIGS. 1, 7, and 9 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 11, in the fourth embodiment, the purge gas supply device 55 of the first embodiment is added to the metal tube coil heat treatment apparatus of the third embodiment shown in FIG.
[0062]
In the metal tube heat treatment apparatus configured as described above, the cylinder 11 is operated, the suction member 1 is raised via the cylinder rod 9, and the suction member 1 is brought into close contact with the central portion of the tray 74 of the LWC 61. Next, the cylinder 53 is operated, the contact plate 54 is lowered via the cylinder rod 9, and the contact plate 54 is brought into close contact with the outer periphery of the upper portion 12 of the hollow shaft portion of the LWC 61. Next, after releasing the valves 5a and 5b, the blower 6 is operated, and the purge gas is supplied from the purge gas supply unit 55a into the cooling zone 27 through the conduit 34a. In this case, the pressure of the purge gas is 6 to 7 kg / cm.²Pressurize with. Further, the purge gas is supplied from the purge gas supply device 55 from one end 61a of the LWC 61 into the metal tube of the LWC 61 via the conduit 34a, the expansion / contraction member 53, the gas inlet member 93, and the gas inlet member 91. Then, since the inner surface residual oil is vaporized in the metal pipe of the LWC 61, it is discharged together with the purge gas from the other end 61b of the LWC 61. As shown by an arrow 106 in the figure, the exhaust gas descends in the suction member 1 and the telescopic tube 2, passes through the conduit 4 a, and is then sucked into the blower 6. Further, the residual oil on the outer surface in the cooling zone 27 is pressurized by the purge gas, passes through between the metal tubes of the LWC 61, and is sucked into the telescopic tube 2 as indicated by an arrow 108 in FIG.
[0063]
Thereby, in addition to having the same effect as the third embodiment, since the purge gas is directly supplied from the purge gas supply device 55 into the metal tube of the LWC 61, even if the LWC 61 is long, Residual oil can be removed even better. Also in this embodiment, the pressure of the purge gas is not set to be particularly high, and the suction force of the blower 6 may be increased to suck the residual oil on the inner surface, the residual oil on the outer surface, and the purge gas.
[0064]
In any of the above-described embodiments, the present invention can be applied to a sealed room such as the inlet side bestable 25a, the outlet side bestable 25b, and the heating zone 26 in addition to the cooling zone 27 shown in FIG.
[0065]
【The invention's effect】
As described above, according to the present invention, the purge gas is supplied to one end of the metal tube coil, and after the purge gas is discharged from the other end to the outside, the purge gas is sucked by the suction device. The residual oil does not reattach to the metal outer surface of the metal tube coil, and the outer surface of the metal tube coil can be prevented from being contaminated by the residual oil.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a metal tube coil heat treatment apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic view showing a metal tube coil heat treatment apparatus according to a first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing another suction member.
FIG. 4 is a cross-sectional view showing another suction member.
FIG. 5 is a schematic diagram showing LWCs placed in a plurality of stages.
FIG. 6 is a schematic diagram showing an LWC placed so that its axis is horizontal.
FIG. 7 is a schematic view showing a metal tube coil heat treatment apparatus according to a second embodiment of the present invention.
FIG. 8 is a schematic view showing an annular plate.
FIG. 9 is a schematic view showing a metal tube coil heat treatment apparatus according to a third embodiment of the present invention.
FIG. 10 is an enlarged schematic view showing an LWC metal tube.
FIG. 11 is a schematic view showing a metal tube coil heat treatment apparatus according to a fourth embodiment of the present invention.
FIG. 12 is a schematic view showing a bright annealing furnace.
FIG. 13 is a schematic view showing a metal tube coil heat treatment apparatus in the first prior art.
FIG. 14 is a schematic view showing a metal tube coil heat treatment apparatus in the second prior art.
[Explanation of symbols]
1: Suction member
1a: Through hole
2; telescopic tube
2b, 2e; cylinder
2c, 2g; contact material
2d; lower end
2f; pressing member
2h; spindle
3, 8, 10; fixing member
4a, 4b, 4c, 4d; conduit
5a, 5b; valve
6; Blower
7; outer periphery
9; Cylinder rod
11; Cylinder
12; Upper part of hollow shaft
12a; lower part of the hollow shaft part
12b: end of the hollow shaft
25a; entry side best
25b; Delivery side best
26; heating zone
27; Cooling zone
28a; entrance table
28b; Delivery side table
31, 91; Gas receiving member
33, 93; gas delivery member
34, 34a, 35; conduit
42, 92; cylinder rod
43, 44; cylinder
43a, 44a; fixing member
53, 54; telescopic members
53a; cylinder
54a; adhesion plate
55, 55a; purge gas supply
61; LWC
61a; one end
61b; other end
65; insulation
65a; upper wall part
65b; bottom surface
71; metal pipe
72; air
74; roller
75; tray
75b; bottom
75c; upper stage
75d; support rod
81; annular plate
82; through-hole
83; adhesion part
84; Supporting part
85; Ventilation hole
88; Sealing material
101, 102, 103, 104, 105, 106, 107, 108; arrow

Claims (14)

A metal tube coil in which one end of the metal tube is on the outer surface side and the other end of the metal tube is on the hollow shaft side is disposed at a predetermined position, and a purge gas supplier is connected to one end of the metal tube. Purge gas is supplied into the metal tube from one end of the metal tube to purge the residual oil in the metal tube, one end of the hollow shaft portion of the metal tube coil is covered with a suction device, and from the other end of the metal tube A heat treatment method for a metal tube coil, wherein the discharged purge gas is sucked by the suction device. According to claim 1, characterized in that suction the gas existing around the metal tube coil is flowed to the other end or al the hollow shaft portion of the hollow shaft portion of the metal pipe coils by the suction device Heat treatment method for metal tube coil. A metal tube coil and the other end of the metal pipe is in a hollow shaft portion with one end of the metal tube is on the outer surface in place, the end of the hand of the hollow shaft portion of the metal pipe coil The hollow shaft portion is sucked by the suction device while being covered with a suction device and the other end portion is covered with a close contact member, and then purge gas is supplied around the metal tube coil by a purge gas supply device. Heat treatment method for metal tube coil. 4. The heat treatment method for a metal tube coil according to claim 3 , wherein the purge gas is pressurized. Heat treatment method for a metal tube coil according to claim 3 or 4, characterized in that to supply the purge gas before Kikin genus tube connects the other purge gas supplying device to one end of the metal tube. A heat treatment apparatus of the metal pipe coil one end of the metal tube to remove residual oil of the metal pipe coil and the other end of the metal pipe is in a hollow shaft portion with outside surface, brought into close contact with one end of the metal tube spaced a purge gas supply for supplying a purge gas into the metal tube from one end of the metal tube, the purge gas discharged from the other end of which is disposed around the metal pipe coil the metal tube to the hollow shaft portion of the metal pipe coil And a metal pipe coil heat treatment device. The metal tube coil is disposed such that its axis is perpendicular to the ground, and the suction device is disposed above the metal tube coil. When the suction device is lowered and raised, the metal tube coil is disposed above the hollow shaft portion. The heat treatment apparatus for a metal tube coil according to claim 6 , wherein the suction device is closely spaced. The metal tube coil heat treatment apparatus according to claim 7 , wherein a closing member is disposed below the hollow shaft portion. The metal tube coil is disposed such that its axis is perpendicular to the ground, and the suction device is disposed below the metal tube coil, and the suction device moves up and down to lower the hollow shaft portion. The heat treatment apparatus for a metal tube coil according to claim 6 , wherein the suction device is closely spaced.   The metal tube coil heat treatment apparatus according to claim 9, wherein a closing member is disposed on an upper portion of the hollow shaft portion. A heat treatment apparatus of the metal pipe coil one end of the metal tube to remove residual oil of the metal pipe coil and the other end of the metal pipe is in a hollow shaft portion with outside surface, around the metal pipe coil A purge gas supply device for supplying a purge gas; a suction device arranged in the axial direction of the metal tube coil and closely spaced from one end of the hollow shaft portion; and the hollow shaft portion arranged in the axial direction of the metal tube coil A metal tube coil heat treatment apparatus, comprising: a close contact member that closely contacts and separates from the other end of the metal tube coil. The metal tube coil is disposed such that its axis is perpendicular to the ground, the suction device is disposed below the metal tube coil, and the contact member is disposed above the metal tube coil. The metal pipe coil heat treatment apparatus according to claim 11 . The heat treatment apparatus of the metal pipe coil according to claim 11 or 12, characterized in that it has another of the purge gas supplying device to supply the purge gas is connected to one end of the metal tube before Kikin genus tube. A tray for placing the metal tube coil, and a soft flexible plate relative to the metal tube coil in close contact with the tray and the metal pipe coil, said metal tube in a central portion of the flexible plate The metal tube coil heat treatment apparatus according to any one of claims 9 to 13 , wherein a through-hole is formed to communicate the hollow shaft portion of the coil with the suction device.

Images