Sleeve installation device and sleeve installation method

Abstract

To provide a sleeve construction device and a sleeve construction method for inserting a sleeve into a furnace body when the position of a crane and the position of the furnace body are separated from each other.SOLUTION: A sleeve construction device 1 includes a pole part 51 having a first hook attachment part 52 attachable to and detachable from a crane hook 72 of a crane 70, and a first support part 53 and a second support part 54 positioned across the first hook attachment part 52 in the pole part 51. The sleeve installation device 1 further includes a sleeve lifting device 50 supported by the first support portion 53 and attachable to and detachable from the sleeve 30, and a weight 55 supported by the second support portion 54. When the pole part 51 is lifted by the crane 70, the weight 55 can be adjusted so that the pole part 51 becomes substantially horizontal, and when the first support part 53 is adjusted to the position of the furnace body 34 and the crane 70 suspends the pole part 51, the sleeve 30 can be inserted into the furnace body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an apparatus for fitting a sleeve made of a bottomed crucible-shaped or cylindrical shaped material to a furnace body, and a method for fitting a sleeve to a furnace body. [Background technology]

[0002] Conventionally, devices have been proposed for applying a sleeve made of a bottomed crucible or cylindrical shaped material to the furnace body when melting and / or refining metals. For example, Patent Document 1 describes a detachable crucible-type induction melting furnace in which a crucible made of shaped refractory material is placed on a hearth bottom refractory material, the top of the crucible is supported by a ring-shaped upper support refractory block, and ceramic fiber is filled between the outer periphery of the crucible and the coil cement around which a heating coil is wound.

[0003] When setting the crucible on top of the hearth refractory, another crucible, previously made from a shaped refractory material such as castable cement, is brought in using a lifting tool and set on top of the hearth refractory. After this, an upper support refractory block is placed in a ring shape above the crucible to secure it in place, completing the replacement process. Therefore, since unshaped powdered refractory material is not used as in the past, no dust is generated during the process, and the crucible can be replaced in about two hours, which is said to improve operation rates. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 9-303969 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the conventional example has the following problem. Referring to FIG. 2 of Patent Document 1, a case where the hearth refractory material is placed directly below the position of a crane or the like is shown. However, due to limitations on the construction site, it may not always be possible to place the hearth refractory material directly below the crane or the like. In this case, it is expected that the crucible lifting tool described in Patent Document 1 will have a problem in that it will not be possible to insert the crucible into the hearth refractory material.

[0006] An object of the present invention is to provide a sleeve construction device and a sleeve construction method for inserting a sleeve into a furnace body when the position of the crane and the position of the furnace body are separated. [Means for solving the problem]

[0007] A sleeve construction device according to a first aspect of the present invention is a device for constructing a sleeve made of a bottomed crucible-shaped or cylindrical standard material in a furnace body for melting and / or refining metal using a crane, and comprises a rod portion having a first hook mounting portion that can be attached and detached to the crane hook of the crane, a first support portion and a second support portion positioned on either side of the first hook mounting portion on the rod portion, a sleeve lifting device supported on the first support portion and that can be attached and detached to the sleeve, and a weight supported on the second support portion, and the weight can be adjusted so that the rod portion is approximately horizontal when the rod portion is lifted by the crane, and when the first support portion is adjusted to the position of the furnace body and the crane suspends the rod portion, the sleeve can be inserted into the furnace body.

[0008] According to this, the sleeve construction device can insert the sleeve into the furnace body when the position of the crane and the position of the furnace body are separated. In the sleeve construction device, the rod portion supports the sleeve lifting device at the first support portion and supports the weight at the second support portion. When the rod portion is lifted by the crane, the position and mass of the weight can be adjusted so that the rod portion is approximately horizontal, so the sleeve can be lifted while balancing the first support portion and the second support portion. Therefore, when the first support portion is adjusted to the position of the furnace body and the crane suspends the rod portion, the sleeve can be inserted into the furnace body.

[0009] The distance between the first support portion and the second support portion of the sleeve construction device and the first hook mounting portion may be changeable. In this case, the position of the first support portion and / or the second support portion relative to the first hook portion can be adjusted according to the mass of the sleeve to balance the sleeve and the weight.

[0010] Furthermore, the sleeve construction device has an axis extending through the cylindrical center of the sleeve as the sleeve center axis, and a radial direction perpendicular to the sleeve center axis, and the sleeve lifting device has a fixing portion that can be attached and detached to the sleeve, a support portion hook mounting portion that can be attached to the first support portion, a connecting portion that connects the fixing portion and the support portion hook mounting portion, and a protruding portion that protrudes radially outward from the outer periphery of the sleeve, and the protruding portions and fixing portions may be three or more in number and arranged separately in the circumferential direction relative to the sleeve center axis.

[0011] In this case, the protrusions are fixed to the sleeve in a state where they are separated in the circumferential direction and include three or more protrusions and a fixing portion, so that they are fixed to the sleeve without being misaligned. When the sleeve is inserted into the furnace body, the protrusions dispersed in the circumferential direction are guided by the inner peripheral wall of the furnace body. Therefore, when the sleeve is inserted into the furnace body, direct contact between the sleeve and the furnace body and damage to the sleeve and / or the furnace body are suppressed. The sleeve can be inserted into the furnace body with the radial center of the furnace body and the radial center of the sleeve close to each other. Furthermore, when the sleeve is inserted into the furnace body, a radial gap can be formed between the inner peripheral wall of the furnace body and the outer peripheral wall of the sleeve.

[0012] Further, the sleeve construction device includes a clamp portion which is the fixed portion, and at least a portion of the protrusion is formed in the clamp portion, and the clamp portion includes a clamp body, an operating plate which is guided by the clamp body and clamps the end of the sleeve between the clamp body and the protrusion, and a pressing member which presses and holds the operating plate from the clamp body, and when the clamp portion is attached to the sleeve, the protrusion and the operating plate clamp and fix the end of the sleeve by the pressing member, and the protrusion directly or indirectly contacts the outer periphery of the sleeve, and a protrusion amount which is the distance between the outermost periphery and the outer periphery of the sleeve is formed.

[0013] In this case, since the protrusion is formed on the clamping portion, which is the fixing portion, the protrusion is more securely held to the sleeve. Therefore, when the sleeve is attached to the furnace body and inserted into the furnace body, the protrusion is prevented from shifting when it comes into contact with the inner peripheral wall of the furnace body, and can be guided stably. Furthermore, since the protrusion on the clamping portion is attached by directly or indirectly contacting the outer periphery of the sleeve, the protrusion protrusion amount is formed stably.

[0014] The sleeve construction device also has a holding portion that holds the protrusion toward the outer periphery of the sleeve, the direction in which the sleeve's central axis extends is the up-down direction, the protrusion is formed like a vertical stripe that extends in the up-down direction from above the upper end of the sleeve toward the lower end of the sleeve, and when attached to the sleeve, has a length that is at least half of the up-down dimension of the sleeve and extends to the lower end of the sleeve, and the holding portion may be a band-shaped or annular support band that covers the protrusion from the outside in the radial direction.

[0015] In this case, since the protrusion is at least half the vertical dimension of the sleeve and has a length extending to the lower end of the sleeve, the protrusion can be guided to the inner peripheral wall of the furnace body from an early stage when the sleeve is inserted into the furnace body. Furthermore, since the support band covers the protrusion from the outside in the radial direction, it is possible to prevent the protrusion from slipping when it comes into contact with the inner peripheral wall of the furnace body.

[0016] In addition, a support band groove is formed on the radially outer side of the protruding portion of the sleeve construction device when attached to the sleeve, and the support band may protrude radially by the same amount as the protruding portion when attached to the support band groove, or may be recessed more than the protruding portion.

[0017] In this case, if the support band is attached to the support band groove, it is possible to prevent the sleeve from slipping when being inserted into the furnace body. Furthermore, when attached to the support band groove, the support band protrudes the same amount as the protrusion in the radial direction or is recessed more than the protrusion, so that when the sleeve is inserted into the furnace body, the support band does not come into contact with the inner peripheral wall of the furnace body and cause resistance during insertion.

[0018] A sleeve construction method according to a second aspect of the present invention is a method for constructing a sleeve in a furnace body for melting and / or refining metals, and includes the steps of measuring the distance between the first hook mounting portion and the central axis of the furnace body, adjusting a first distance between the first hook mounting portion and the first support portion, and fixing the first support portion to the rod portion; measuring a first mass of the sleeve; setting a second distance between the first hook mounting portion and the second support portion, and setting a second mass of the weight to be attached to the second support portion so that the rod portion lifted by the crane is approximately horizontal; lifting the sleeve construction device with the crane, moving the first support portion onto the central axis of the furnace body, and inserting the sleeve into the furnace body; and removing the sleeve lifting device from the sleeve.

[0019] According to this, when the crane and the furnace body are separated from each other, the position of the sleeve lifting device can be adjusted to the position of the furnace body and the sleeve can be inserted into the furnace body. The second mass of the weight and the second distance are set to balance the first mass of the sleeve at the first support part, so that the sleeve can be inserted into the furnace body with the rod part in a substantially horizontal position.

[0020] In addition, the sleeve construction method may include a step of setting the vertical positions of the weight and the sleeve lifting device so that, when the rod portion is lifted upward by the crane, the vertical dimension between the weight installation position and the lower end of the weight is less than the vertical dimension between the lower end of the sleeve and the sleeve installation position.

[0021] In this case, when the crane descends, the weight is installed at the weight installation position, and at the same time, or afterwards, the sleeve is installed at the sleeve installation position. Therefore, when the sleeve lifting device is removed from the sleeve, the load on the support hook is released, and the rod portion can be prevented from bouncing up. This makes it easy to remove the sleeve lifting device from the sleeve, and improves safety. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a diagram showing the entire sleeve construction device 1 of the present invention. [Figure 2] 1A shows a plan view seen from above, in which (a) shows a state in which the position of the first support part 53 is different from the position of the furnace body 34, and (b) shows a state in which the bearing 73 of the first hook mounting part is rotated to align the position of the first support part 53 with the position of the furnace body 34. [Figure 3] 2A and 2B are cross-sectional views showing the cross section S1-S1 in FIG. 1, where (a) is a first configuration example and (b) is a second configuration example. [Figure 4] 1 is a cross-sectional view showing a sleeve lifting device 50a of a first embodiment of the sleeve lifting device 50, showing a state in which the sleeve lifting device 50a is attached to the sleeve 30. FIG. [Figure 5] FIG. 5 is a plan view seen from above in relation to FIG. 4. [Figure 6] 5 is a detailed view of part A in FIG. 4, showing the relationship between the clamp part 7 and the connecting part 4, and (a) to (e) show the process of attaching the connecting part 4 to the clamp part 7. FIG. [Figure 7]6(d) is a view seen from the direction B, and is a detailed view showing the relationship between the clamp portion 7 and the connecting portion 4, and FIG. 6(b) is a cross-sectional view showing the cross section S2-S2 in FIG. 6(d). [Figure 8] 1 is a perspective view showing a sleeve lifting device 50a, illustrating a state in which the sleeve lifting device 50a is attached to the sleeve 30. FIG. [Figure 9] 10A and 10B are oblique views showing the procedure for attaching and detaching the sleeve lifting device 50a to the sleeve 30, where (a) shows the procedure for attaching the clamp section 7 to the sleeve 30, (b) shows the procedure for attaching the support band 62, (c) shows the state in which the sleeve lifting device 50a has been attached to the sleeve 30, and (d) shows the procedure for removing the sleeve lifting device 50a together with the support band 62 from the sleeve 30. [Figure 10] 10 is a cross-sectional view showing a sleeve lifting device 50b of a second embodiment of the sleeve lifting device 50. FIG. [Figure 11] 10 is a cross-sectional view showing a sleeve lifting device 50c according to a third embodiment of the sleeve lifting device 50. FIG. [Figure 12] A desirable example of the procedure for installing a cylindrical sleeve 30 in the furnace body 34 of an induction furnace using the sleeve installation device 1 is shown, where (a) shows the state in which the sleeve lifting device 50a attached to the sleeve 30 placed on the sleeve stand 79 is attached to the first support part 53 and the weight 55 is attached to the second support part 54, and (b) shows the state in which the sleeve installation device 1 is lifted by the crane 70. [Figure 13] 12(a) shows a desirable example of the procedure for installing a cylindrical sleeve 30 in the furnace body 34 of an induction furnace using the sleeve installation device 1, where (a) shows the process of lowering the crane 70 from the state shown in FIG. 12(b) and inserting the sleeve 30 into the furnace body 34, and (b) shows the state in which the weight 55 is installed at the weight installation position 56, and (b) shows the state in which the sleeve 30 has been inserted into the furnace body 34. [Figure 14]The figures show undesirable examples of the procedure for installing a cylindrical sleeve 30 in the furnace body 34 of an induction furnace using a sleeve installation device 1, where (a) shows the state in which the sleeve 30 and weight 55 are placed on a support surface at the same height, the sleeve lifting device 50a attached to the sleeve 30 is attached to the first support part 53, and the weight 55 is attached to the second support part 54, and (b) shows the state in which the sleeve installation device 1 is lifted by a crane 70. [Figure 15] 14(b) shows an undesirable example of the procedure for installing a cylindrical sleeve 30 in the furnace body 34 of an induction furnace using the sleeve installation device 1, where (a) shows the process of lowering the crane 70 from the state shown in FIG. 14(b) and inserting the sleeve 30 into the furnace body 34, and shows the state in which the sleeve 30 is installed at the sleeve installation position 35, and (b) shows the state of the rod portion 51 when the sleeve lifting device 50a is removed from the state in which the sleeve 30 has been inserted into the furnace body 34. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, a sleeve construction device 1 and a sleeve construction method embodying the present invention will be described with reference to the drawings. Note that the description of the embodiment of the invention and the drawings referred to are used to explain the technical features that can be adopted by the present invention. The present invention is not limited to these. The configurations shown in the drawings are merely illustrative examples and are not intended to limit the present invention.

[0024] <Overall configuration of sleeve construction device 1> A sleeve construction apparatus 1 according to a first aspect of the present invention will be described. First, the overall configuration of the sleeve construction apparatus 1 will be described. As shown in FIG. 1 and other figures, the sleeve construction apparatus 1 is an apparatus that uses a crane 70 to construct a sleeve 30 made of a bottomed crucible-shaped or cylindrical shaped material in a furnace body 34 for melting and / or refining metal. The sleeve construction apparatus 1 comprises a rod portion 51 having a first hook mounting portion 52 that is detachable from a crane hook 72 of the crane 70, and a first support portion 53 and a second support portion 54 that are positioned on either side of the first hook mounting portion 52 on the rod portion 51. Furthermore, the sleeve construction apparatus 1 comprises a sleeve lifting device 50 that is supported by the first support portion 53 and detachable from the sleeve 30, and a weight 55 that is supported by the second support portion 54. When the rod portion 51 is lifted by the crane 70, the weight 55 can be adjusted so that the rod portion 51 is approximately horizontal, and when the first support portion 53 is adjusted to the position of the furnace body 34 and the crane 70 suspends the rod portion 51, the sleeve 30 can be inserted into the furnace body 34.

[0025] As shown in FIG. 1, the distance between the first support portion 53 and the second support portion 54 and the first hook mounting portion 52 is adjustable. The first support portion 53 is adjustable within a distance 53LM, and the second support portion 54 is adjustable within a distance 54LM. As shown in FIG. 1, an axis connecting the first hook mounting portion 52 and the crane 70 is defined as a first central axis C1, and the rod portion 51 is rotatable around the first central axis C1. As shown in FIGS. 1 and 2, the rod portion 51 and the first hook mounting portion 52 may be connected via a bearing 73, or the wire of the crane 70 may be rotatable by twisting or the like without the bearing 73. The radial direction about the first central axis C1 is defined as a first radial direction.

[0026] The configurations of the rod portion 51, the first support portion 53, and the second support portion 54 will be described. As shown in FIG. 1, the rod portion 51 has multiple support portion holes 74 on each of the right and left sides of the first hook mounting portion 52. The first support portion 53 and the second support portion 54 are fixed to one of the support portion holes 74. FIG. 3 is a cross-sectional view of the second support portion 54, but the first support portion 53 has a similar configuration. As shown in a first configuration example in FIG. 3(a), separate upper and lower support members 77 and 78 surround the rod member 59 and are fixed to the support portion holes 74 with bolts 75 and nuts 76. A support portion hook 71 is fixed to the lower support member 78. Alternatively, as shown in a second configuration example in FIG. 3(b), the lower support member 78 and the upper support member 77 are welded to each other, and the support portion hook 71 is fixed to the lower support member 78 so that the support portion hook 71 can withstand a high load. The rod member 59 passes through between the lower support member 78 and the upper support member 77 and is fixed to the support hole 74 by a bolt 75 and a nut 76 .

[0027] As shown in Fig. 3, the rod member 59 has a structure in which a U-shaped member and a flat plate are welded together. The rod member 59, upper support member 77, and lower support member 78 are formed of steel. In the example shown in Figs. 1 and 2, the rod portion 51 is connected to the first hook mounting portion 52 via a bearing 73, but if the bearing 73 is not used, the rod portion 51 and the first hook mounting portion 52 are welded together. The distance between the first support portion 53 and the first hook mounting portion 52 is a first distance L1, and the distance between the second support portion 54 and the first hook mounting portion 52 is a second distance L2. The procedure for setting the first distance L1 and the second distance L2 will be described later.

[0028] 1, the mass of the weight 55 can be adjusted by increasing or decreasing the cylindrical adjustment weight 57 relative to the central axis 58a of the weight base 58. The central axis 58a of the weight base 58 engages with the support portion hook 71 of the second support portion 54.

[0029] The following configuration may also be provided. As described below, the second distance L2 between the second support portion 54 and the first hook mounting portion 52 and the second mass M2 of the weight 55 are adjusted relative to the first mass M1 of the sleeve 30 supported by the first support portion 53 so that the rod portion 51 is horizontal. At this time, it may be difficult to fine-tune the mass of the adjustment weight 57 of the weight 55. In response to this, as shown in FIG. 1 , the sleeve construction device 1 may be configured to include an auxiliary support portion 54s on the same side of the first hook mounting portion 52 as the second support portion 54, and to use the auxiliary weight 55s to adjust the rod portion 51 so that it is horizontal. The auxiliary support portion 54s is fixed to a support portion hole 74 at an appropriate position. In this case, the auxiliary weight 55s allows for finer mass adjustment than the adjustment weight 57 of the weight 55. The configuration of the auxiliary support portion 54s is the same as that of the first support portion 53 and the second support portion 54 described with reference to FIG. 3.

[0030] <Effects of the overall configuration of the sleeve construction device 1> The overall configuration of the sleeve construction device 1 described above provides the following advantages. The sleeve construction device 1 can insert the sleeve 30 into the furnace body 34 when the position of the crane 70 and the position of the furnace body 34 are separated. In the sleeve construction device 1, the rod 51 supports the sleeve lifting device 50 at the first support 53 and supports the weight 55 at the second support 54. When the rod 51 is lifted by the crane 70, the position and mass of the weight 55 can be adjusted so that the rod 51 is approximately horizontal. This allows the sleeve 30 to be lifted while balancing the first support 53 and the second support 54. Therefore, when the first support 53 is adjusted to the position of the furnace body 34 and the crane 70 suspends the rod 51, the sleeve 30 can be inserted into the furnace body 34.

[0031] Furthermore, the sleeve construction device 1 can adjust the position of the first support portion 53 and / or the second support portion 54 relative to the first hook mounting portion 52 according to the mass of the sleeve 30, thereby adjusting the balance between the sleeve 30 and the weight 55. Therefore, even if the sleeve 30 changes, it can be inserted into the furnace body 34 by adjusting the necessary locations. Furthermore, since the rod portion 51 can rotate around the first central axis C1, the sleeve 30 can be moved to the position of the furnace body 34.

[0032] <Common configuration of the sleeve lifting device 50> Next, a configuration common to each embodiment of the sleeve lifting device 50 will be described. As shown in FIGS. 4 to 11, the sleeve lifting device 50 includes a fixed portion 2 detachably attached to the sleeve 30, a support hook attachment portion 3 to which a support hook 71 of a crane 70 can be attached, and a connecting portion 4 connecting the fixed portion 2 and the support hook attachment portion 3. The sleeve lifting device 50 further includes a protrusion 11 that protrudes radially outward from the outer periphery of the sleeve 30. Three or more protrusions 11 and fixed portions 2 are provided, and are arranged separately in the circumferential direction about the sleeve central axis C2. Examples of furnaces include an induction furnace and a crucible furnace. The sleeve lifting device 50 can be used with any of these furnaces. As shown in FIG. 4 and other figures, the radial direction centered on the sleeve central axis C2 is defined as the second radial direction.

[0033] As shown in FIGS. 4 to 9 and 11, the clamping portion 7 and the connecting portion 4 may be separate members, or may be an integrated member as shown in FIG.

[0034] 5, there are three or more protrusions 11 and fixing parts 2, which are spaced apart in the circumferential direction about the sleeve central axis C2. When the fixing parts 2 are attached to the sleeve 30, the support part hook attachment parts 3 are positioned closely on the sleeve central axis C2.

[0035] In the example shown in FIG. 5, there are four protrusions 11 and four fixing portions 2, which are formed at the vertices of a rectangle centered around the sleeve central axis C2. The protrusions 11 and four fixing portions 2 are evenly spaced in the circumferential direction and spaced apart at an angle θ1. Alternatively, there may be three protrusions 11 and four fixing portions 2, which are formed at the vertices of a triangle centered around the sleeve central axis C2, or there may be five protrusions 11 and four fixing portions 2, which are formed at the vertices of a pentagon centered around the sleeve central axis C2. Furthermore, there may be six or more protrusions 11 and four fixing portions 2.

[0036] The fixing portion 2 may be a clamp portion 7 that is detachably attached to the end of the sleeve 30 as shown in Fig. 6 etc., or may be detachably attached to the inner peripheral wall 32 of the sleeve 30 (not shown). The holding portion 5, which will be described later, may be a clamp portion 7 that also functions to hold the protrusion 11 as shown in Fig. 6 etc., or may be a support band 62 that covers the protrusion 11 from the outside in the radial direction and holds it toward the outer periphery of the sleeve 30 as shown in Fig. 9 etc.

[0037] <Effects of the common configuration of the sleeve lifting device 50> As described above, the common configuration of the sleeve lifting device 50 provides the following advantages. As shown in FIG. 12 and other figures, the sleeve lifting device 50 includes the protrusion 11, which is guided by the inner peripheral wall 44 of the furnace body 34 when the sleeve 30 is inserted into the furnace body 34. Therefore, the sleeve lifting device 50 can insert the sleeve 30 into the furnace body 34 while aligning the sleeve central axis C2 and the furnace body central axis C2 closely. Furthermore, when the sleeve 30 is inserted into the furnace body 34, mutual interference and damage to each other can be suppressed.

[0038] <Configuration of clamp unit 7> Next, the configuration of the clamp unit 7 will be described. As shown in FIG. 6 , sleeve lifting devices 50a to 50c include clamp units 7, which are fixed units 2, and at least a portion of protrusion 11 is formed on the clamp units 7. Specifically, when the clamp units 7 are attached to the sleeve 30, the radially outer periphery corresponds to protrusion 11. The clamp units 7 include a clamp body 8, an actuating plate 15 that is guided by the clamp body 8 and sandwiches the end of the sleeve 30 between itself and protrusion 11, and a pressing member 13 that presses and holds the actuating plate 15 from the clamp body 8. As a function of the fixed unit 2, the clamp units 7 fix the end of the sleeve 30 by sandwiching it between the protrusion 11 and the actuating plate 15 via the pressing member 13. The protrusion 11 directly or indirectly contacts the outer periphery of the sleeve 30, forming a protrusion amount 21, which is the distance between the outermost periphery 20 and the outer periphery of the sleeve 30. The clamping portion 7 functions as a holding portion 5 (described later) by pressing the operating plate 15 against the inner peripheral wall 32 of the sleeve 30, thereby holding the protrusion 11 toward the outer periphery of the sleeve 30.

[0039] 6 and 7, the structure in which the clamp portion 7 is attached to the upper end portion 33 of the sleeve 30 will be described in detail. As shown in FIG. 6(a), the clamp portion 7 includes a clamp body 8, a protruding portion 11, a support bridge portion 18, and an inner hanging portion 10. The inner hanging portion 10 is formed with a guide hole 17, two bolts serving as pressing members 13 that press and hold the operating plate 15, and a female thread portion 14 into which the pressing member 13 screws. The operating plate 15 is formed with a guide pin 16 that is guided by the guide hole 17 in the inner hanging portion 10 and can move radially. Rubber sheets serving as elastic members 12 are attached to the inside of the protruding portion 11 and the outside of the operating plate 15.

[0040] 6(a), when the clamp part 7 is attached to the upper end part 33 of the sleeve 30, the end part of the sleeve 30 is sandwiched between the protrusion part 11 and the operating plate 15, and the installation part 26 of the clamp body 8 is placed on the upper end part 33 of the sleeve 30. Next, when the bolt which is the pressing member 13 is rotated in the tightening direction, the operating plate 15 moves radially outward, and the protrusion part 11 and the operating plate 15 are fixed to the end part of the sleeve 30 via the elastic material 12, respectively.

[0041] As shown in FIG. 6(a), the connecting portion 4a is inserted between the support bridge portion 18 and the installation portion 26 of the clamp body 8. When the connecting portion 4a is moved upward as shown in FIG. 6(b) or 6(c), the engaging portion 19 of the connecting portion 4a engages with the support bridge portion 18. Alternatively, the clamp unit 7a may be attached to the end of the sleeve 30 with the connecting portion 4a temporarily inserted between the support bridge portion 18 and the installation portion 26 of the clamp body 8. FIGS. 6(d) and 6(e) show a state in which the connecting portion 4 is attached to the clamp unit 7, and the sleeve lifting device 50 can lift the sleeve 30 using the crane 70. When the clamp unit 7 and the connecting portion 4 are attached to the sleeve 30, the radial end 28 of the connecting portion 4 is positioned radially inward of the outermost peripheral portion 20 of the protrusion 11, which protrudes most radially.

[0042] 7(a) and 7(b), the connecting portion 4a is inserted into a groove portion 25 formed in the clamp body 8. The connecting portion support portion 24 of the connecting portion 4a is formed with a thickness that allows it to be inserted into the groove portion 25. In other words, the connecting portion 4a is guided by the groove portion 25 and is movable in the up and down direction.

[0043] <Effects of the configuration of the clamping section 7> As described above, the configuration of the clamp unit 7 of the sleeve lifting device 50 provides the following effects. As shown in FIG. 6 , in the sleeve lifting device 50, the protrusion 11 of the clamp unit 7 is inserted into and directly or indirectly contacts the outer periphery of the sleeve 30. The clamp unit 7 is configured so that the protrusion 11 is fixed to the end of the sleeve 30, and the operating plate 15 is actuated in the radial direction to clamp the sleeve 30. Unlike the operating plate 15, whose position fluctuates when pressed by the pressing member 13, the protrusion 11 is fixed to the outer periphery wall 31 of the sleeve 30, and therefore fluctuations in the protrusion amount 21 are small. Therefore, the protrusion amount 21 of the protrusion 11 is stably formed.

[0044] <Configuration of sleeve lifting device 50a> Next, the configuration and effects unique to the sleeve lifting device 50a of the first embodiment of the sleeve lifting device 50 will be described. Descriptions of configurations common to the other embodiments already described will be omitted. As shown in Figures 4 to 7, in the sleeve lifting device 50a, the clamp portion 7a doubles as the fixing portion 2 and the holding portion 5. Furthermore, the protrusion 11 is formed on the clamp portion 7a. The support portion hook mounting portion 3 is formed integrally with the connecting portion 4a. As an example, the clamp portion 7a and the connecting portion 4a are both members formed from steel.

[0045] 4 and 6, the connecting portion 4a includes a connecting portion support portion 24 that extends horizontally and supports the clamp portion 7, a connecting portion arm portion 23 that is connected to the connecting portion support portion 24 and extends diagonally downward, and a connecting portion bottom portion 22 that is connected to the connecting portion arm portion 23 and extends horizontally. The support portion hook mounting portion 3 is formed on the connecting portion bottom portion 22. The position at which the support portion hook 71 and the support portion hook mounting portion 3 engage is located below the upper end portion 9 of the clamp portion 7a when the connecting portion 4a supports the clamp portion 7a. The support portion hook mounting portion 3 is formed at a position a distance F below the upper end portion 9 of the clamp portion 7a.

[0046] The connecting portion 4a in the example shown in Fig. 5 is formed symmetrically with respect to the sleeve central axis C2 as shown in Fig. 1. That is, it is formed symmetrically with respect to the support portion hook attachment portion 3, and is formed so as to extend continuously in the radial direction as shown in Fig. 5.

[0047] Next, the protrusion 11 will be described with reference to FIG. 4 and other figures. The sleeve construction device 1 includes a holding unit 5 that holds the protrusion 11 toward the outer periphery of the sleeve 30. The direction in which the sleeve central axis C2 extends is defined as the vertical direction. The protrusion 11 is formed as a vertical stripe extending from above the upper end 33 of the sleeve 30 toward the lower end of the sleeve 30. When attached to the sleeve 30, the protrusion 11 has a length that is at least half the vertical dimension of the sleeve 30 and extends to the lower end of the sleeve 30. The holding unit 5 is a band-like or annular support band 62 that covers the protrusion 11 from the radially outer side. The support band 62 is preferably an elastic member. The support band 62 may be formed in a ring shape, or may be formed in a band shape and maintain the protrusion 11 covered by a hook-and-loop fastener or a fastener. An inclined portion 64 is formed at the lower end of the protrusion 11. Although it is desirable for the protrusion 11 to extend to a position adjacent to the lower end of the sleeve 30, it may be formed only in the range near the upper end of the sleeve 30.

[0048] In addition, a support band groove 63 is formed on the radial outside of the protrusion 11 when attached to the sleeve 30, and the support band 62, when attached to the support band groove 63, has the same protrusion amount 21 as the protrusion 11 in the radial direction, or is recessed more than the protrusion 11.

[0049] The sleeve lifting device 50a has a protrusion 11 formed on the clamp portion 7a, which is the fixed portion 2, and is formed so that when attached to the sleeve 30, the lower end of the protrusion 11 extends to a position adjacent to the lower end of the sleeve 30.

[0050] As shown in Fig. 4, support band grooves 63 are formed in two locations on the protruding portion 11, and support bands 62 are attached so as to fit into the support band grooves 63. An elastic material 12 is attached to the protruding portion 11 at a position corresponding to the support band grooves 63 between the protruding portion 11 and the outer peripheral wall 31 of the sleeve 30. The support band grooves 63 are formed near the lower end of the protruding portion 11 and at a position approximately midway between the protruding portion 11 and the sleeve 30 in the up-down direction.

[0051] The procedure for attaching the sleeve lifting device 50a to the sleeve 30 will be described with reference to Figure 9. As shown in Figure 9(a), first, the clamp part 7a is attached to the sleeve 30. Next, as shown in Figure 9(b), the support band 62 is attached to the support band groove 63. The support band 62 is preferably made of an elastic material, and by attaching it to the protrusion 11, it functions as the holding part 5 that holds the protrusion 11 toward the outer periphery of the sleeve 30.

[0052] Figure 9(c) shows the state in which the sleeve lifting device 50a is attached to the sleeve 30. In this state, the sleeve 30 is lifted by the crane 70 and inserted into the furnace body 34. After the sleeve 30 is inserted into the furnace body 34, the clamp part 7a is removed from the sleeve 30 as shown in Figure 9(d), and the sleeve lifting device 50a is lifted by the crane 70. At this time, the support band 62 holds the protrusion 11 toward the outer periphery of the sleeve 30 and further engages with the support band groove 63, so that the protrusion 11 is lifted together with the sleeve 30.

[0053] <Effects of the configuration of the sleeve lifting device 50a> The configuration of the sleeve lifting device 50a, which is the first embodiment of the sleeve lifting device 50 described above, provides the following advantages. As shown in FIG. 8 and other figures, the protrusion 11 is at least half the vertical dimension of the sleeve 30 and extends to the lower end of the sleeve 30. This allows the protrusion 11 to be guided to the inner circumferential wall 44 of the furnace body 34 from an earlier stage when inserting the sleeve 30 into the furnace body 34. Furthermore, the sleeve lifting device 50 includes a retaining portion 5 that holds the protrusion 11 toward the outer periphery of the sleeve 30. The support band 62 of an elastic member that constitutes the retaining portion 5 covers the protrusion 11 from the radial outside, thereby preventing the protrusion 11 from slipping off when it comes into contact with the inner circumferential wall 44 of the furnace body 34. Furthermore, if the protrusion 11 extends to a position adjacent to the lower end of the sleeve 30, the protrusion 11 can be guided to the inner circumferential wall 44 of the furnace body 34 from an earlier stage. Therefore, when the sleeve 30 is inserted into the furnace body 34, the sleeve 30 is guided by the protrusion 11 to the inner peripheral wall 44 of the furnace body 34 from the initial stage. This prevents the lower end of the sleeve 30 from coming into direct contact with the furnace body 34 and being damaged.

[0054] The sleeve construction device 1 involves a process of aligning the first support portion 53 with the position of the furnace body central axis of the furnace body 34, and therefore it is difficult to achieve precise alignment. The sleeve 30 is guided to the inner peripheral wall 44 of the furnace body 34 by the protrusions 11 from the initial stage, so that even if there is a misalignment between the first support portion 53 and the furnace body central axis of the furnace body 34, the misalignment can be corrected by the protrusions 11 while the sleeve 30 is inserted into the furnace body 34.

[0055] 4, when the support bands 62 are fitted into the support band grooves 63, they are prevented from slipping out of place when the sleeve 30 is inserted into the furnace body 34. Furthermore, when fitted into the support band grooves 63, the support bands 62 have the same radial protrusion amount 21 as the protrusions 11 or are recessed more than the protrusions 11, preventing the support bands 62 from coming into contact with the inner peripheral wall 44 of the furnace body 34 and causing resistance during insertion when the sleeve 30 is inserted into the furnace body 34. Furthermore, when the sleeve lifting device 50 is removed from the sleeve 30 and lifted, the support bands 62 are lifted together with the protrusions 11 while engaged with the support band grooves 63.

[0056] Furthermore, since the protrusion 11 is formed integrally with the clamp portion 7a, the time required for attachment and detachment to the sleeve 30 is shortened. Furthermore, since the support band groove 63 is formed near the lower end of the protrusion 11 and at a position approximately midway between the top and bottom of the sleeve 30, the support band 62 stably holds the protrusion 11 on the outer periphery of the sleeve 30. This prevents problems such as the protrusion 11 shifting or rolling up during the process of inserting the sleeve 30 into the furnace body 34. Furthermore, the sleeve lifting device 50a can be easily removed from the sleeve 30 after the sleeve 30 has been inserted into the furnace body 34.

[0057] <Configuration of sleeve lifting device 50b> Next, with reference to FIG. 10, a sleeve lifting device 50b, which is a second embodiment of the sleeve lifting device 50, will be described. The sleeve lifting device 50b differs from the sleeve lifting device 50a in that the clamp portion 7b and the connecting portion 4b are integrally formed. Here, "integrally" includes cases where the clamp portion 7b and the connecting portion 4b are integrally molded or processed, and cases where they are integrally assembled. For example, the clamp portion 7b and the connecting portion 4b are formed from steel. As shown in FIG. 10, the clamp portion 7b has the same configuration as that described with reference to FIGS. 6 and 7, except that it is integrally formed with the connecting portion 4b. Furthermore, similar to the sleeve lifting device 50a, the support portion hook mounting portion 3 is integrally formed with the connecting portion 4b.

[0058] <Effects of sleeve lifting device 50b> The configuration of the sleeve lifting device 50b described above provides the following advantages in addition to the advantages of the common configuration already described. As shown in Fig. 10, the sleeve lifting device 50b has the clamping portion 7b and the connecting portion 4b formed integrally. This reduces the number of work steps at the construction site.

[0059] <Configuration of sleeve lifting device 50c> Next, a sleeve lifting device 50c according to a third embodiment will be described with reference to FIG. 11. The sleeve lifting device 50c differs from the other embodiments in the configuration of the connecting portion 4c. As shown in FIG. 11, the connecting portion 4c is formed of a wire or rope, etc., and is passed through a support hole 27 in the clamp portion 7c. The support portion hook mounting portion 3 has the connecting portion 4c, such as a wire, fastened to the support portion hook 71 at a position corresponding to the sleeve central axis C2. The configuration in which the clamp portion 7c is mounted to the end of the sleeve 30 is similar to that of the clamp portion 7a, etc., as shown in FIG. 11.

[0060] <Effects of sleeve lifting device 50c> The configuration of the sleeve lifting device 50c described above provides the following advantages in addition to the advantages of the common configuration already described. As shown in FIG. 11, the configuration is simple because the connecting portion 4c is formed of a wire, rope, or the like. Therefore, the sleeve lifting device 50c can be made compact when transported. Furthermore, it can be manufactured inexpensively.

[0061] <Explanation of sleeve installation method> Next, a sleeve construction method will be described with reference to FIG. 1 and FIGS. 12 to 15. The sleeve construction method is a method of constructing a sleeve 30 in a furnace body 34 for melting and / or refining metals using the sleeve construction apparatus 1 already described. The sleeve construction method includes the steps of measuring the distance between the first hook mounting portion 52 and the central axis of the furnace body 34, and adjusting a first distance L1 between the first hook mounting portion 52 and the first support portion 53 to secure the first support portion 53 to the rod portion 51, as shown in FIG. 1. Next, the method includes the steps of measuring a first mass M1 of the sleeve 30. Next, the method includes the steps of setting a second distance L2 between the first hook mounting portion 52 and the second support portion 54, and setting a second mass M2 of the weight 55 attached to the second support portion 54 so that the rod portion 51 lifted by the crane 70 is approximately horizontal. Next, the method includes the steps of lifting the sleeve construction apparatus 1 using the crane 70, moving the first support portion 53 onto the central axis of the furnace body, and inserting the sleeve 30 into the furnace body 34. Next, the method includes a step of removing the sleeve lifting device 50 from the sleeve 30.

[0062] 1, a step of supporting auxiliary weight 55s on auxiliary support part 54s to finely adjust rod part 51 so that it is horizontal may be included. Fine adjustment using auxiliary support part 54s includes adjusting the position of support part hole 74 that fixes auxiliary support part 54s and adjusting the mass of auxiliary weight 55s. This allows fine adjustment and makes it possible to adjust rod part 51 to be horizontal even when it is not possible to adjust rod part 51 to be horizontal using second support part 54 and weight 55 alone.

[0063] 1, the second distance L2 is often set to be greater than the first distance L1 so that the second mass M2 of the weight 55 is smaller than the first mass M1 of the sleeve 30. In this case, if the sleeve construction device 1 is lifted by the crane 70 without any load being applied to the first support portion 53 and the second support portion 54, the rod portion 51 may tilt due to its own weight, posing a safety risk. To address this, although not shown, the rod portion 51 may be provided with an auxiliary support portion 54s on the first support portion 53 side relative to the first hook mounting portion 52, and an auxiliary weight 55s may be supported on the auxiliary support portion 54s so that the rod portion 51 is approximately horizontal. Note that the auxiliary weight 55s on the first support portion 53 side may be removed when the sleeve 30 is supported on the first support portion 53.

[0064] Also, as shown in Figure 12, the method includes a step of setting the vertical positions of the weight 55 and the sleeve lifting device 50 so that, when the rod portion 51 is lifted upward by the crane 70, the vertical dimension h1 between the weight installation position 56 and the weight lower end 55a is equal to or less than the vertical dimension h2 between the sleeve lower end 80 and the sleeve installation position 35.

[0065] 12 and 13 are diagrams showing a preferred example of a sleeve construction method. As shown in FIG. 12(a), the sleeve 30 is attached to the rod portion 51 with the sleeve lower end 80 placed on the sleeve base 79 and the weight lower end 55a placed on the weight base 65. As shown in FIG. 1, the first distance L1, the second distance L2, and the second mass M2 are set so that (first distance L1 × gravity due to first mass M1) = (second distance L2 × gravity due to second mass M2). Strictly speaking, the first distance L1, the second distance L2, and the second mass M2 are set taking into account the gravity acting on the rod portion 51 so that the rod portion 51 is approximately horizontal when the sleeve construction device 1 is lifted by the crane 70.

[0066] 12(b), when the sleeve construction device 1 is lifted by the crane 70 with the sleeve 30 and weight 55 supported, the vertical dimension h1 between the weight installation position 56 and the weight lower end 55a is equal to or less than the vertical dimension h2 between the sleeve lower end 80 and the sleeve installation position 35. The weight installation position 56 may be the upper end surface of the weight platform 65 or another member.

[0067] As shown in Figure 13(a), the crane 70 descends, and the sleeve 30 is inserted into the furnace body 34 by the sleeve construction device 1. At this time, the weight lower end 55a is placed at the weight installation position 56 before the sleeve lower end 80 is placed at the sleeve installation position 35.

[0068] 13(b), when the crane 70 further descends, the sleeve lower end 80 is installed at the sleeve installation position 35. At this time, the rod portion 51 is tilted downward and to the right by an angle rθ with respect to the first hook mounting portion 52.

[0069] Next, an undesirable example of the sleeve construction method will be described with reference to Figures 14 and 15. As shown in Figure 14(a), the sleeve 30 is placed directly on the installation surface, and the weight 55 is placed on a weight platform 65 and supported by the first support portion 53 and the second support portion 54, respectively. As shown in Figure 14(b), in the sleeve construction device 1 that is lifted by the crane 70 with the sleeve 30 and weight 55 supported, the vertical dimension h1 between the weight installation position 56 and the weight lower end 55a is larger than the vertical dimension h2 between the sleeve lower end 80 and the sleeve installation position 35.

[0070] As shown in Figure 15(a), the crane 70 descends, and the sleeve 30 is inserted into the furnace body 34 by the sleeve construction device 1. At this time, when the sleeve lower end 80 is placed at the sleeve installation position 35, the weight 55 is not placed at the weight installation position 56.

[0071] 15(b), if an attempt is made to remove the first support portion 53 from the sleeve 30 in this state, the rod portion 51 will rotate counterclockwise as shown in the figure due to the gravity of the weight 55. At this time, there is a risk of it hitting the operator.

[0072] <Effects of sleeve installation method> The sleeve construction method described above has the following advantages. When the crane 70 and the furnace body 34 are separated from each other, the sleeve construction method allows the sleeve lifting device 50 to be positioned at the furnace body 34 and the sleeve 30 to be inserted into the furnace body 34. The second mass M2 of the weight 55 is set to balance the first mass M1 of the sleeve 30 at the first support portion 53, so the sleeve 30 can be inserted into the furnace body 34 with the rod portion 51 in a substantially horizontal position.

[0073] Furthermore, in the sleeve installation method, when the crane 70 is lowered, the weight 55 is installed at the weight installation position 56, and simultaneously thereafter, the sleeve 30 is installed at the sleeve installation position 35. The first support portion 53 and the second support portion 54 are released from the loads of the sleeve 30 and the weight 55, respectively. Therefore, when the sleeve lifting device 50 is removed from the sleeve 30, the rod portion 51 is released from the load on the support portion hook 71, and the rod portion 51 can be prevented from bouncing up. This allows the sleeve lifting device 50 to be easily removed from the sleeve 30, and improves safety. In other words, it is possible to prevent the rod portion 51 from bouncing up at the same time as the support portion hook 71 is removed from the first support portion 53. [Explanation of symbols]

[0074] 1. Sleeve construction device 2 Fixed part 4, 4a, 4b, 4c connection part 5 Holding part 7, 7a, 7b, 7c Clamp section 8 Clamp body 9 Upper end 11 Protrusion 13 Pressing member 15 Actuation plate 20 outermost part 21 Overhang amount 30 sleeves 32 Inner wall 33 Upper end 34 Furnace body 35 Sleeve installation position 44 Inner wall 50, 50a, 50b, 50c Sleeve lifting device 51 Shaft 52 First hook attachment part 53 First support part 53LM distance 54 Second support part 54LM distance 55 weight 55a Lower end of weight 56 Weight installation position 62 Support Belt 63 Support groove 70 Crane 72 Crane Hook 80 Lower end of sleeve C1 First central axis C2 Sleeve central axis L1 first distance L2 second distance h1 vertical dimension h2 vertical dimension

Claims

1. An apparatus for installing a sleeve made of a bottomed crucible or cylindrical shaped material on a furnace body for melting and / or refining metals using a crane, a rod portion having a first hook attachment portion detachable from a crane hook of the crane; In the rod portion, a first support portion and a second support portion are positioned on either side of the first hook attachment portion; a sleeve lifting device supported by the first support portion and detachable from the sleeve; a weight supported by the second support portion; The weight can be adjusted so that the rod is approximately horizontal when the rod is lifted by the crane, A sleeve construction device that can insert the sleeve into the furnace body when the first support part is adjusted to the position of the furnace body and the crane suspends the rod part.

2. The sleeve construction device according to claim 1 , wherein the distance between the first support portion and the second support portion and the first hook mounting portion is changeable.

3. an axis extending through the cylindrical center of the sleeve is defined as a sleeve central axis, and a direction perpendicular to the sleeve central axis is defined as a radial direction; The sleeve lifting device is a fixing portion detachably attached to the sleeve; a support hook attachment portion attachable to the first support portion; a connecting portion that connects the fixing portion and the support portion hook attachment portion; a protruding portion that protrudes radially outward beyond an outer periphery of the sleeve, The sleeve construction device according to claim 1 , wherein the protruding portions and the fixing portions are three or more in number and are arranged separately in the circumferential direction relative to the central axis of the sleeve.

4. a clamp portion serving as the fixing portion, At least a portion of the protrusion is formed on the clamping portion, The clamp portion is A clamp body; an actuation plate that is guided by the clamp body and that sandwiches the end of the sleeve between the actuation plate and the protrusion; a pressing member that presses and holds the operating plate against the clamp body, When the clamping portion is attached to the sleeve, The protrusion and the actuation plate clamp and fix the end of the sleeve by the pressing member, The sleeve construction device according to claim 3 , wherein the protrusion is in direct or indirect contact with the outer periphery of the sleeve, and a protrusion amount is formed which is the distance between the outermost periphery and the outer periphery of the sleeve.

5. a holding portion that holds the protrusion toward the outer periphery of the sleeve, The direction in which the sleeve central axis extends is defined as the up-down direction, The protrusion is The sleeve is formed in a vertical stripe shape extending in the up-down direction from above the upper end of the sleeve toward the lower end of the sleeve, When attached to the sleeve, the length is at least half of the vertical dimension of the sleeve and extends to the lower end of the sleeve, The sleeve construction device according to claim 3 , wherein the holding portion is a band-shaped or annular support band that covers the protrusion from the outside in the radial direction.

6. The protrusion has a support band groove formed on an outer side in the radial direction when the protrusion is attached to the sleeve, A sleeve construction device as described in claim 5, wherein when the support band is attached to the support band groove, the support band protrudes by the same amount as the protrusion in the radial direction, or is recessed more than the protrusion.

7. A method for installing a sleeve in a furnace body for melting and / or refining metals using the sleeve installation device according to any one of claims 1 to 6, a step of measuring a distance between the first hook mounting portion and a furnace body central axis of the furnace body, adjusting a first distance between the first hook mounting portion and the first support portion, and fixing the first support portion to the rod portion; measuring a first mass of the sleeve; setting a second distance between the first hook attachment portion and the second support portion, and setting a second mass of the weight attached to the second support portion so that the rod portion hoisted by the crane is approximately horizontal; Lifting the sleeve construction device by the crane, moving the first support part onto the furnace body central axis, and inserting the sleeve into the furnace body; A sleeve installation method comprising a step of removing the sleeve lifting device from the sleeve.

8. In a state where the rod portion is lifted upward by the crane, A sleeve installation method as described in claim 7, which includes a step of setting the vertical positions of the weight and the sleeve lifting device so that the vertical dimension between the weight installation position and the lower end of the weight is less than the vertical dimension between the lower end of the sleeve and the sleeve installation position.

Images