JP6472563B1 - Metal strip cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a heated metal band rapidly and efficiently within a short conveyance distance in a metal band cooling device for cooling a heated metal band conveyed continuously.
An air nozzle 10 is provided so as to face a heated metal strip to be transported in order to cool a heated metal strip W that is continuously transported, and the air nozzle is provided with respect to the metal strip. The pair of linear nozzles 11, 11 extending in the width direction of the metal band for blowing gas is projected to the metal band side so as to face the upstream side and the downstream side in the transport direction of the metal band with a required interval. The cooling medium c was sprayed together with the gas from the linear nozzle toward the metal strip.
[Selection] Figure 2

Description

  The present invention relates to a metal band cooling device for cooling a heated metal band conveyed continuously. In particular, the present invention is characterized in that the heated metal strip can be cooled quickly and efficiently within a short transport distance when the heated metal strip is continuously cooled.

  Conventionally, while the heated metal strip is continuously conveyed, as shown in Patent Documents 1 to 4, the heated metal strip is cooled.

  Here, in cooling the heated metal band continuously conveyed, in what is shown by patent document 1, it follows the width direction of a metal band on the heated metal band conveyed continuously. A plurality of cooling water nozzles are provided, and cooling water is dropped from the cooling water nozzles onto the metal strip. In Patent Document 2, the cooling water nozzles are continuously conveyed. A plurality of spray nozzles are provided under the heated metal strip along the width direction of the metal strip, and cooling water is sprayed from below the metal strip by these spray nozzles. .

  However, as shown in Patent Documents 1 and 2, when cooling water is sprayed directly on the heated metal strip to be conveyed, it flows from the metal strip before the sprayed water is evaporated. Therefore, the metal band cannot be efficiently cooled by effectively using the heat of evaporation of water, and in order to sufficiently cool the heated metal band, a large amount of cooling water is used for a long time. There was a problem that it was necessary to spray.

  In Patent Document 3, the heated metal strip is guided to the cooling zone to be cooled, and the metal strip is further floated by the first blower type floater provided downstream of the cooling zone in the transport direction of the metal strip. The metal strip is further cooled in the water tank, the metal strip cooled in this manner is led out from the water tank, and the second fusible type on the downstream side in the transport direction of the metal strip It is shown that it is transported in a floated state by a floater.

  However, as shown in Patent Document 3, after the heated metal strip is cooled by being guided to the cooling zone, the first fusible floater in which the metal strip is provided downstream of the cooling zone in the transport direction of the metal strip. The metal strip is transported in a floating state and guided into the water tank, the metal band is further cooled in the water tank, and the metal band thus cooled is led out from the water tank, and the metal band is transported downstream in the transport direction. When transported in a state of being floated by the fumarole type floater 2, there is a problem that the equipment becomes large and the cost is very high.

  Moreover, in patent document 4, after injecting gas from a floater with respect to a metal strip and carrying it in the state which floated the metal strip and heat-treating, when cooling the metal strip after heat processing, After preliminarily cooling both width ends, this metal strip is led to a cooling floater, and a low-temperature cooling gas is injected into the metal strip in the cooling floater so that the metal strip is rapidly cooled. Is shown.

  However, as shown in Patent Document 4, it is difficult to rapidly cool the metal band by injecting a gas such as a cooling gas to the metal band in a cooling floater, and rapidly cool the metal band. In order to achieve this, it is necessary to inject a very low temperature cooling gas, and the cost required to sufficiently cool the cooling gas is high, or the low temperature cooling gas is strongly injected into the metal strip. There was a problem that it was necessary.

  Further, in Patent Document 5, in a strip levitation pressure pad (floater), a fluid is sprayed under a continuously conveyed strip (metal strip) to float and transport the strip. In addition to providing parallel slit nozzles, at least one pair of rectifying plates projecting toward the ends at the center between the slit nozzles is provided symmetrically, and a plurality of fluid jets are formed along the rectifying plates inside these rectifying plates. A hole is shown.

  Here, what is shown in Patent Document 5 is that the fluid is blown from the slit nozzle or the fluid ejection hole to the lower surface of the strip, and the fluid is suppressed from flowing laterally from the lower surface of the strip by the current plate. Enhances the levitation and stability of the strip due to the fluid sprayed on the bottom surface of the strip, and transports the strip in a stable state even when the amount of fluid sprayed from the slit nozzle or fluid ejection hole to the bottom surface of the strip is reduced. It is what was made possible, and it is not shown at all that the heated metal strip is cooled while the heated metal strip is continuously conveyed.

Japanese Utility Model Publication No. 53-99311 JP 2011-131248 A JP 61-253329 A (Japanese Patent Publication No. 6-6751) JP 2017-66481 A Japanese Patent Laid-Open No. 6-10065 (Japanese Patent Publication No. 7-30416)

  It is an object of the present invention to cool a heated metal band rapidly and efficiently within a short conveyance distance in a metal band cooling device that cools a heated metal band that is continuously conveyed. To do.

In the first metal strip cooling device according to the present invention, in order to solve the above-described problems, the metal strip cooling device that cools the continuously transported metal strip is heated and transported. An air nozzle is provided so as to face the metal band, and a pair of linear nozzles extending in the width direction of the metal band for blowing gas to the metal band are provided on the upstream side in the transport direction of the metal band. on the downstream side so as to face each other with a predetermined interval provided so as to protrude on the metal band side Rutotomoni, air nozzle a recess provided between said pair of straight nozzle, said from the linear nozzle of the The cooling medium is sprayed together with the gas toward the metal strip, and the cooling medium sprayed together with the gas from each of the linear nozzles toward the metal strip is accommodated in the recess and is of And so as to contact to the genus band.

And in the air nozzle provided so as to face the heated metal band to be conveyed as in the cooling device for the first metal band, as described above, on the upstream side and the downstream side in the conveyance direction of the metal band. Rutotomoni provided a linear nozzle extending in the width direction of the metal strip so as through a required distance blowing gas to the metal strip so as to project the metal band side, between the pair of straight nozzle When a cooling medium is sprayed together with gas from the linear nozzle toward the metal band, the cooling medium sprayed toward the metal band comes into direct contact with the metal band. with, the contained cooling medium in a recess provided in the air nozzle is in contact with the metal strip between the pair of straight nozzle, the cooling medium sprayed by the heat of the metal strip is effectively evaporated, Contact upon evaporation That the metal band is heated by heat of evaporation is to be cooled quickly and efficiently.

  Moreover, in the 2nd metal strip cooling device in this invention, in order to solve the above subjects, it is conveyed in the metal strip cooling device which cools the heated metal strip continuously conveyed. An air nozzle is provided so as to face the heated metal band, and a pair of linear nozzles extending in the width direction of the metal band for blowing gas to the metal band is provided upstream of the metal band in the conveyance direction of the metal band. The cooling medium is provided so as to protrude to the metal band side so as to face the downstream side and the downstream side with a required interval, and toward the metal band in the recess of the air nozzle between the pair of linear nozzles A plurality of spray holes for spraying gas, spraying gas from the linear nozzle toward the metal band, and cooling toward the metal band from the plurality of spray holes provided in the recess. And so as to spray the medium.

  And in the air nozzle provided so as to face the heated metal band to be conveyed, like the cooling device for the second metal band, as described above, on the upstream side and the downstream side in the metal band conveyance direction. Gas is blown toward the metal band from a pair of linear nozzles provided so as to protrude toward the metal band side so as to face each other with a required interval, and the recesses between the pair of linear nozzles are blown into the recesses. When the cooling medium is sprayed from the plurality of provided spray holes toward the metal band, the cooling medium sprayed toward the metal band is in direct contact with the metal band or in the recess between the linear nozzles. The cooling medium sprayed by the heat of the metal band that is maintained and in contact with the metal band is efficiently evaporated, and the metal band heated by the heat of evaporation at the time of evaporation is quickly and efficiently cooled.

  Further, in the cooling device for the second metal strip, at least one set of rectifying plates whose center portions protrude toward the end portions are provided symmetrically in the concave portions, and along the inner sides of the rectifying plates, It is preferable to provide a plurality of spray holes. If it does in this way, the cooling medium sprayed toward the metal strip from the plurality of spray holes provided in the recess will be regulated by the left and right rectifying plates and will flow and leak on both sides in the width direction of the metal strip. The cooling medium sprayed from these spray holes toward the metal band is maintained in the recesses between the linear nozzles and efficiently contacts the metal band, so that the cooling medium evaporates more reliably. As a result, the metal band heated by the evaporation heat during evaporation is cooled more quickly and efficiently.

  In the cooling device for the second metal strip, the cooling medium is sprayed toward the metal strip from the plurality of spray holes provided in the recess between the pair of linear nozzles, as described above. As in the invention of the cooling device for the first metal strip, the cooling medium can be sprayed together with the gas from the linear nozzle toward the metal strip. In this way, the cooling medium sprayed from the spray hole and the linear nozzle toward the metal strip is more contacted with the heated metal strip and evaporated, and is heated by the evaporation heat during evaporation. The metal strip is cooled more quickly and efficiently.

  Here, in the first and second metal strip cooling devices, when the air nozzle is provided so as to face the heated metal strip as described above, the air nozzle is heated and conveyed. It can be provided on the lower surface side or upper surface side of the metal strip. Here, gas is blown onto the metal strip from the linear nozzle, and the metal strip is transported in a lifted state so as not to contact the air nozzle, and the cooling medium sprayed toward the metal strip is linear. In order to be efficiently cooled by being in contact with the metal strip in the recess between the nozzles, it is common to provide the air nozzle on the lower surface side of the heated metal strip being conveyed. However, it is also possible to provide the air nozzle on the upper surface side of the heated metal strip to be conveyed. Furthermore, the air nozzle provided on the lower surface side of the metal band and the air nozzle provided on the upper surface side of the metal band may be provided so as to face each other through the heated metal band being conveyed.

In the cooling device for the first metal strip in the present invention, the air nozzle provided to face the heated metal strip to be transported, as described above, the required distance between the upstream side and the downstream side in the transport direction of the metal strip. as the linear nozzle extending in the width direction of the metal strip for blowing a gas projecting metal strip side with respect to the metal strip so as to through the provided Rutotomoni, the air nozzle between said pair of straight nozzle the provided, linear Rutotomoni a cooling medium with gas from the nozzle is sprayed toward the metal strip, the cooling medium which is sprayed with a gas toward the metal strip from the linear nozzle of the recess, so as to contact with the metal strip by accommodated in the recess of the, also in the cooling device of the second metal strip is provided with a plurality of spray holes in the recess between the pair of linear nozzles, the plurality Since the cooling medium is sprayed from the spray hole toward the metal band, the spray is sprayed from the plurality of spray holes provided in the recess between the pair of linear nozzles or the pair of linear nozzles toward the metal band. A cooling medium in which the cooling medium is in direct contact with the metal band, and the mist-shaped cooling medium maintained in the recesses between the linear nozzles is in contact with the metal band, and becomes a mist by the heat of the metal band. Is efficiently evaporated, and the metal band heated by the heat of evaporation during evaporation is quickly and efficiently cooled.

In the cooling device for a metal strip according to an embodiment of the present invention, a schematic plane showing a state in which the heated metal strip is continuously transported over the air nozzle when the heated metal strip is cooled by the air nozzle. FIG. In the cooling device for the first metal strip in the above-described embodiment, a pair of straight lines provided so as to protrude to the metal strip side so as to face the upstream side and the downstream side in the transport direction of the metal strip with a required gap therebetween. It is a schematic sectional explanatory drawing which showed the state which sprays a cooling medium with gas toward the heated metal strip conveyed from a shape nozzle. In the cooling device for the second metal strip in the above-described embodiment, a pair of straight lines provided so as to protrude to the metal strip side so as to face the upstream side and the downstream side in the transport direction of the metal strip with a required gap therebetween A gas is blown toward the heated metal band conveyed from the nozzle and the cooling medium is directed toward the heated metal band conveyed from the plurality of spray holes provided in the recesses between the pair of linear nozzles. It is a schematic cross-sectional explanatory drawing which showed the state to spray. In the cooling device for the second metal strip in the above-described embodiment, a plurality of sets of rectifying plates whose center portions protrude toward the end portions are provided symmetrically in the recesses between the pair of linear nozzles, and the inner sides of these rectifying plates FIG. 6 is a schematic plan view showing a state in which a plurality of spray holes are provided along the line. In the first and second metal band cooling devices in the above-described embodiment, the metal band is provided so as to protrude to the metal band side so as to face the upstream side and the downstream side in the transport direction of the metal band with a required interval. The cooling medium is sprayed together with the gas toward the heated metal strip conveyed from the pair of linear nozzles, and the heating is conveyed from a plurality of spray holes provided in the recesses between the pair of linear nozzles. It is a schematic cross-sectional explanatory drawing which showed the state which sprays a cooling medium toward the made metal strip.

  Hereinafter, a metal strip cooling device according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The metal strip cooling device according to the present invention is not limited to the one shown in the following embodiments, and can be implemented with appropriate modifications within a range not changing the gist of the invention.

  Here, in the cooling device for the metal strip W in the first embodiment, as shown in FIG. 1, the metal strip W heated and continuously conveyed is guided onto the air nozzle 10, and the top of the air nozzle 10 is The heated metal strip W is cooled by being conveyed so as to pass through.

  And in this 1st Embodiment, as shown in FIG.1 and FIG.2, on the upper surface of the air nozzle 10 facing the said metal band W, the metal band W orthogonal to the conveyance direction of the said metal band W is shown. A pair of linear nozzles 11, 11 along the width direction are provided so as to protrude to the metal band W side so as to face the upstream side and the downstream side in the transport direction of the metal band W with a required interval. Further, air is blown as a gas from the linear nozzles 11 and 11 to the metal strip W conveyed as described above. Note that the linear nozzle 11 includes not only an elongated rectangular hole such as a slit but also a linear nozzle 11 that is not shown in the figure, but includes a plurality of holes arranged in a straight line.

  Here, in the first embodiment, air is supplied from the air supply pipe 12 into the air nozzle 10, and water is provided in the vicinity of the pair of linear nozzles 11, 11 in the air nozzle 10. The refrigerant spray nozzle 13 for spraying the cooling medium c such as the above is provided, and the cooling medium c sprayed from each of the refrigerant spray nozzles 13 together with the air supplied into the air nozzle 10 from the air supply pipe 12 is provided. The linear nozzles 11 and 11 are blown toward the heated metal band W conveyed on the air nozzle 10.

  As described above, when the cooling medium c is sprayed together with the air toward the heated metal strip W conveyed from each of the linear nozzles 11, 11, the sprayed cooling medium c is heated. The cooling medium c which is evaporated in direct contact with the metal strip W and which remains without being evaporated is introduced into the recess 14 of the air nozzle 10 between the linear nozzles 11 and 11 in the form of mist. In the inside, the metal bands W that are heated are sequentially brought into contact and evaporated.

  As a result, the cooling medium c sprayed together with the gas from each of the linear nozzles 11 and 11 toward the metal band W is in direct contact with the heated metal band W and is heated in the recess 14. The cooling medium c sprayed by the heat of the metal band W in contact with the metal band W is efficiently evaporated, and the metal band W heated by the evaporation heat at the time of evaporation is quickly and efficiently cooled. become.

  Next, also in the cooling device for the metal strip W in the second embodiment, as shown in FIG. 3, similarly to the cooling device for the metal strip W in the first embodiment, it is heated and continuously conveyed. The metal band W to be carried is guided onto the air nozzle 10 and is conveyed so as to pass over the air nozzle 10 so that the heated metal band W is cooled.

  Here, also in the second embodiment, as described above, the pair of linear nozzles 11 and 11 along the width direction of the metal band W orthogonal to the transport direction of the metal band W is used as the metal band W. The metal strip W is provided so as to protrude to the metal strip W side so as to face the upstream side and the downstream side in the transport direction with a predetermined interval, and is fed to the metal strip W transported as described above from each linear nozzle 11, 11. On the other hand, air is blown as a gas.

  Further, in the second embodiment, water or the like is contained in the air nozzle 10 below the recess 14 of the air nozzle 10 between the pair of linear nozzles 11 and 11 provided so as to protrude toward the metal band W side. A plurality of refrigerant spray nozzles 13 for ejecting the cooling medium c are provided, and a plurality of sprays for spraying the cooling medium c ejected from the respective refrigerant spray nozzles 13 toward the metal strip W in the recesses 14. A hole 15 is provided.

  In the second embodiment, when supplying air from the air supply pipe 12 into the air nozzle 10, the linear nozzles 11, 11 are provided for supplying air supplied from the air supply pipe 12. Guide channels 12a and 12a are provided to guide the air nozzle 10, and air is guided to the linear nozzles 11 and 11 through the guide channels 12a and 12a, and is continuously heated by the linear nozzles 11 and 11. In addition, air is blown onto the metal strip W conveyed in this manner, and air is supplied from the air supply pipe 12 into the air nozzle 10 in the recess 14 provided with the spray holes 15. The cooling medium c ejected from the air is blown toward the metal strip W conveyed on the air nozzle 10 through the plurality of spray holes 15 provided in the recess 14. .

  In this way, air is blown toward the heated metal strip W conveyed from each of the linear nozzles 11, 11, and through the plurality of spray holes 15 provided in the recess 14 between the linear nozzles 11, 11. When the cooling medium c is sprayed together with the gas toward the heated metal band W conveyed on the air nozzle 10, the sprayed cooling medium c is applied to the heated metal band W in the recess 14. It comes to contact sequentially.

  As a result, in the second embodiment, the gas is sprayed together with the gas toward the heated metal strip W conveyed on the air nozzle 10 through the plurality of spray holes 15 provided in the recess 14. The cooling medium c is sequentially brought into contact with the heated metal band W, the cooling medium c is efficiently evaporated by the heat of the metal band W, and the metal band W heated by the evaporation heat at the time of evaporation is Cooling quickly and efficiently.

  As in the second embodiment, the cooling medium c ejected from the coolant spray nozzle 13 is sprayed toward the metal strip W in the recess 14 between the pair of linear nozzles 11, 11. In providing the spray holes 15, as shown in FIG. 4, a plurality of sets of rectifying plates 16 whose central portions protrude toward the end portions are provided symmetrically in the concave portions 14, and along the inner sides of these rectifying plates 16. It is preferable to provide a plurality of the spray holes 15.

  If it does in this way, the cooling medium c sprayed toward the metal strip W from the plurality of spray holes 15 provided in the concave portion 14 as described above is regulated by the left and right rectifying plates 16 and the metal strip W described above. The cooling medium c sprayed from the spray hole 15 toward the metal band W is maintained in the recess 14 between the linear nozzles 11, 11. The cooling medium c sprayed on the metal strip W that is heated and transported comes into contact efficiently, and the cooling medium c is more reliably evaporated, and the metal heated by the evaporation heat at the time of evaporation The band W is cooled more quickly and efficiently.

  In the first embodiment, the cooling medium c ejected from the pair of linear nozzles 11 and 11 toward the metal band W flows to both sides of the metal band W in the width direction and leaks out. As described above, the rectifying plate 16 as described above can be provided in the recess 14 between the linear nozzles 11 and 11.

  Next, also in the cooling device for the metal strip W in the third embodiment, as shown in FIG. 5, similarly to the cooling device for the metal strip W in the first embodiment, it is heated and continuously conveyed. The metal band W to be carried is guided onto the air nozzle 10 and is conveyed so as to pass over the air nozzle 10 so that the heated metal band W is cooled.

  Here, also in the thing of 3rd Embodiment, a pair of linear nozzles 11 and 11 along the width direction of the metal strip W orthogonal to the conveyance direction of the metal strip W as mentioned above are used. The metal strip W is provided so as to protrude to the metal strip W side so as to face the upstream side and the downstream side in the transport direction with a predetermined interval, and is fed to the metal strip W transported as described above from each linear nozzle 11, 11. On the other hand, air is blown as a gas.

  And in the thing of 3rd Embodiment, while providing the refrigerant | coolant spray nozzle 13 which sprays the cooling medium c, such as water, in the air nozzle 10 in the vicinity of each said linear nozzle 11, 11, respectively, A plurality of refrigerant spray nozzles 13 for ejecting a cooling medium c such as water is provided in the air nozzle 10 below the concave portion 14 between the linear nozzles 11, 11, and the concave portion 14 is provided with the refrigerant spray nozzles 13. A plurality of spray holes 15 for spraying the jetted cooling medium c toward the metal strip W are provided.

  In the third embodiment, air is supplied from the air supply pipe 12 into the air nozzle 10 and sprayed from the refrigerant spray nozzles 13 together with the air supplied into the air nozzle 10. The cooling medium c is sprayed toward the heated metal strip W conveyed on the air nozzle 10 through the linear nozzles 11 and 11, and through the plurality of spray holes 15 provided in the recess 14. The air nozzle 10 is blown toward the heated metal band W conveyed.

  In this way, the cooling medium c sprayed together with the gas toward the heated metal band W conveyed on the air nozzle 10 from each of the linear nozzles 11, 11 is heated to the heated metal band. The cooling medium c that is evaporated in contact with W and that has not been evaporated flows into the recess 14 and is heated over the air nozzle 10 through a plurality of spray holes 15 provided in the recess 14. The cooling medium c sprayed toward the metal band W is sequentially brought into contact with the heated metal band W, and the sprayed cooling medium c is efficiently evaporated by the heat of the metal band W. It becomes like this.

  As a result, in the third embodiment, the cooling is sprayed together with the gas toward the heated metal strip W conveyed on the air nozzle 10 from each of the linear nozzles 11 and 11. The metal strip heated together with the medium c and the cooling medium c sprayed toward the heated metal strip W conveyed on the air nozzle 10 through the plurality of spray holes 15 provided in the recess 14. The cooling medium c sprayed by the heat of the metal band W in contact with W in sequence is efficiently evaporated, and the metal band W heated by the evaporation heat at the time of evaporation is quickly and efficiently cooled. Become.

  Also in the third embodiment, the metal from the cooling medium c ejected from the pair of linear nozzles 11, 11 toward the metal band W and the plurality of spray holes 15 provided in the recess 14. In order to prevent the cooling medium c sprayed toward the band W from flowing and leaking on both sides in the width direction of the metal band W to be conveyed, As shown in FIG. 4, a plurality of sets of rectifying plates 16 whose central portions protrude toward the end portions can be provided symmetrically.

  Further, in each of the embodiments shown in the drawings, the metal band W is transported in the horizontal direction. Although not shown, the metal band W is transported in the vertical direction. It may be the one. When the metal strip W is transported in the vertical direction in this way, the air nozzle 10 does not need to act as a floater that lifts the metal strip W.

10: Air nozzle 11: Linear nozzle 12: Air supply pipe 12a: Guide channel 13: Refrigerant spray nozzle 14: Recess 15: Spray hole 16: Current plate W: Metal strip c: Cooling medium

Claims (5)

In a metal strip cooling device for cooling a heated metal strip that is continuously transported, an air nozzle is provided so as to face the heated metal strip that is transported, and the air nozzle is provided with respect to the metal strip. a pair of linear nozzle extending in the width direction of the metal strip for blowing a gas, Ru provided to so as to face each other with a predetermined distance in the conveying direction upstream side and the downstream side of the metal strip projecting metal strip side In addition, a recess is provided in the air nozzle between the pair of linear nozzles, and the cooling medium is sprayed together with the gas from each of the linear nozzles toward the metal strip, and from each of the linear nozzles. A cooling device for a metal band, characterized in that a cooling medium sprayed together with a gas toward the metal band is accommodated in the concave portion and brought into contact with the metal band.   In a metal strip cooling device for cooling a heated metal strip that is continuously transported, an air nozzle is provided so as to face the heated metal strip that is transported, and the air nozzle is provided with respect to the metal strip. A pair of linear nozzles extending in the width direction of the metal band for blowing the gas are provided so as to protrude to the metal band side so as to face the upstream side and the downstream side in the transport direction of the metal band with a required interval therebetween. A plurality of spray holes for spraying the cooling medium toward the metal strip in the recess between the pair of linear nozzles, and blowing the gas from the linear nozzle toward the metal strip; A cooling device for a metal strip, wherein the cooling medium is sprayed toward the metal strip from the plurality of spray holes provided on the metal strip.   3. The cooling device for a metal strip according to claim 2, wherein at least one pair of rectifying plates having a central portion projecting toward an end portion is provided symmetrically in the concave portion, and the spray is formed along the inner sides of the rectifying plates. A metal band cooling device comprising a plurality of holes.   4. The metal strip cooling device according to claim 2, wherein a cooling medium is sprayed together with a gas from the linear nozzle toward the metal strip. . 5. The metal strip cooling device according to claim 1, wherein the air nozzle is provided at least below the heated metal strip to be transported. 6. Cooling system.

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