JP7411857B1 - Jig for installing molten metal filtration unit - Google Patents

Abstract

A molten metal filtration unit installation jig for moving and pressing the molten metal filtration unit on the hearth of the filtration chamber to a predetermined position along the inner wall surface of the filtration chamber, wherein the molten metal filtration unit is installed at at least one end. the jig includes a casing, a pair of strip-shaped down plates, and a hydraulic jack; A portion of the end surface in contact with the periphery in the lateral direction; and a portion of each surface in contact with the periphery in the longitudinal direction of the upper surface of the side plate, so that these parts of the side plate can be continuously covered; 2) The hydraulic jack includes one hydraulic pump and a pair of pressing parts connected via two hydraulic pipes extending and branching from the hydraulic pump, and in the installed state, the pair of pressing parts each have a pair of down A molten metal filtration unit installation jig is disclosed that is configured to be able to be placed below the surface of the plate that does not come into contact with each side plate.

Description

The present invention provides a jig for installing a molten metal filtration unit in a filtration chamber, more specifically, a jig for installing a molten metal filtration unit in a filtration chamber, and more specifically, a molten metal filtration unit placed on a hearth of a filtration chamber. This invention relates to a jig for installing a molten metal filtration unit for moving and pressing it into a predetermined position.

Molten metal such as aluminum used for manufacturing castings usually contains nonmetallic inclusions such as hydrogen and oxides as impurities. For example, dissolved hydrogen in molten metal can form cavities called porosity in castings, and oxides and the like can become inclusions in castings. These cavities and inclusions are undesirable because they can become starting points for fracture of the casting. Therefore, filtration devices have been developed for filtering molten metal and removing inclusions and the like contained in the molten metal.

To achieve this objective, a molten metal filtration unit having a plurality of ceramic filtration tubes for filtering impurities from the molten metal is typically installed in a filtration chamber provided with an inlet and an outlet. A molten metal filtration device has been used (for example, see Patent Document 1). Such a molten metal filtration unit is generally composed of a plurality of ceramic filtration tubes and a pair of side plates arranged substantially parallel to each other at both ends of the plurality of filtration tubes in the longitudinal direction. . The molten metal introduced into the filtration chamber from the inlet of the filtration chamber enters from the peripheral wall of the filtration tube provided with one side plate, impurities are filtered there, and then the molten metal enters the filtration tube from the opposite side of the filtration tube provided with the other side plate. The hot water is discharged from the end of the filtration chamber, and then flows out from the outlet of the filtration chamber.

In preparation for performing filtration work on molten metal using such a molten metal filtration device, first, the molten metal filtration unit is moved and installed from outside the filtration chamber to the hearth inside the filtration chamber using a hanging jig or the like. Next, the molten metal filtration unit is placed at the outlet of the filtration chamber so that mixing of the filtered molten metal and unfiltered molten metal (leakage of the filtered molten metal from the molten metal filtration unit) can be reliably prevented. It is required to move to a predetermined position along the communicating inner wall surface, press it, and bring it into close contact. For example, in a molten metal filtration device disclosed in Patent Document 1, in which a molten metal filtration unit composed of a plurality of ceramic filtration tubes and a pair of side plates is installed in a filtration chamber, the molten metal filtration unit is installed in the exit direction of the molten metal filtration unit. It is desirable that the side plate is firmly pressed to a predetermined position on the inner wall surface communicating with the tap outlet of the filtration chamber, for example via a packing, without any gaps.

As a structure for moving the molten metal filtration unit to a predetermined position along the inner wall surface communicating with the tap outlet of the filtration chamber, for example, the upper surface of the side plate of the molten metal filtration unit in the hot water input direction (the opposite side to the hot water tap direction) and Molten metal filtration comprising a casing that partially covers the end face on the inlet side, and a hydraulic jack or a pandagraph type jack that applies pressure to move the molten metal filtration unit partially covered by the casing to a predetermined position. An installation device for the unit is proposed.

Japanese Patent Application Publication No. 7-4868

Using the installation device for the molten metal filtration unit as proposed above, the side plate of the molten metal filtration unit in the pouring direction and the inner wall surface communicating with the tap outlet of the filtration chamber are brought into close contact with each other without any gaps via the packing. In order to move the filtration unit while maintaining its orientation, it is necessary to install hydraulic cylinders, which are the pressing parts of hydraulic jacks, at at least two positions on the casing that partially covers the side plate facing the hot water supply direction. It is desirable to do so.

However, when there are a plurality of pressure points, for example two pressure points, by a hydraulic jack on the casing covering the side plate in the pouring direction of the molten metal filtration unit as described above, it is usually necessary to pressurize these two pressure points. It would be necessary to provide two separate hydraulic pumps. In this case, two separate pressure force control systems also exist. Due to these two separate hydraulic pumps and pressurizing force control systems, an imbalance in pressurizing force and/or a difference in pressurizing timing at the two pressurizing points is likely to occur. Become. Therefore, it is possible to move the entire molten metal filtration unit toward a predetermined position within the filtration chamber while maintaining a state in which the end surface of the side plate in the direction of hot water exit and the inner wall surface communicating with the tap outlet of the filtration chamber are substantially parallel. often difficult. As a result, the end surface of the side plate of the molten metal filtration unit in the tapping direction and the inner wall surface communicating with the tap outlet of the filtration chamber are fixed in a state where pressure is not uniformly applied across the surface through the packing, and as a result, the filtered molten metal There was a risk that the airtightness during tapping from the molten metal filtration unit would be impaired, the filtered molten metal would leak, and the efficiency of filtration would decrease.

In addition, when pressing the side plate on the outlet side of the molten metal filtration unit and the inner wall surface communicating with the outlet of the filtration chamber through the packing, the distance between the end surface of the side plate and the inner wall surface of the filtration chamber is measured and monitored. A method has been proposed in which the molten metal filtration unit is installed at an appropriate position by providing a means to do so. However, depending on such a method, it is disadvantageous that it is difficult to press the molten metal filtration unit sufficiently evenly, and the risk of failure due to the complexity of the device configuration may also increase.

Therefore, the problem to be solved by the present invention is to solve the above-mentioned disadvantages, that is, to move the entire molten metal filtration unit installed on the hearth of the filtration chamber toward a predetermined position along the inner wall surface of the filtration chamber. , a state in which the end surface of the side plate in the hot water exit direction and the inner wall surface communicating with the tap outlet of the filtration chamber are approximately parallel without causing an imbalance in pressurizing force at a plurality of pressing points and/or a shift in pressurizing timing. To provide a molten metal filtration unit installation jig that can be moved while holding the molten metal filtration unit and has a simple device configuration.

As a result of extensive research, the present inventors have discovered a molten metal filtration unit (hereinafter simply referred to as a "filtration unit" throughout this specification) that includes a flat, substantially rectangular parallelepiped-shaped side plate on at least one end. When designing a jig to move and press the casing to a predetermined position along the inner wall surface of the filtration chamber after placing it on the hearth of the filtration chamber, we decided to remove the casing from both ends of the casing in the longitudinal direction. A pair of strip-shaped down plates extending substantially vertically downward at two positions separated by a distance, connected via one hydraulic pump and two hydraulic pipes extending and branching from there. The jig is configured to include a hydraulic jack that includes a pair of pressing parts, and when this jig is attached to the molten metal filtration unit, (1) the top surface of the side plate and the vicinity of the longitudinal periphery of the top surface are continuously (2) The casing is formed to have a shape that matches the upper structure of the side plate, and (2) the down plate is formed so that it can come into contact with the end surface of the filtration unit (the surface on the hot water input side) of the side plate. and (3) forming the hydraulic jack so that each of the pair of branched pressing parts branched from one hydraulic pump can be disposed below the surface of the pair of down plates that does not come into contact with the side plates. The inventors have discovered that the above-mentioned problems can be solved, and have completed the present invention.

A typical embodiment of the present invention is as follows.
A molten metal filtration unit installation jig for moving and pressing the molten metal filtration unit installed on the hearth of the filtration chamber to a predetermined position along the inner wall surface of the filtration chamber,
The molten metal filtration unit is configured to include a flat, substantially rectangular parallelepiped-shaped side plate at at least one end,
The jig includes a casing, a pair of strip-shaped down plates, and a hydraulic jack,
i) When the jig is attached to the molten metal filtration unit, the casing includes at least the upper surface of the side plate; a part of the end surface in contact with the lateral edge of the upper surface of the side plate; A part of each surface in contact with the longitudinal periphery of the upper surface of the side plate is formed so that these parts of the side plate can be continuously covered,
ii) The pair of down plates extend approximately vertically downward at two positions spaced approximately equidistant from both ends of the casing in the longitudinal direction, and the jig is connected to the molten metal filtration unit. In the installed state, each down plate is formed so as to be able to come into contact with the end surface of the side plate,
iii) The hydraulic jack includes one hydraulic pump and a pair of pressing parts connected via two hydraulic pipes extending and branching from the one hydraulic pump, and the jig is connected to the molten metal filtration unit. In the state where the pair of pressing portions are mounted on the device, each of the pair of pressing portions is configured to be able to be placed below a surface that does not come into contact with each of the side plates of the pair of down plates.
Jig for installing molten metal filtration unit.

According to the molten metal filtration unit installation jig of the present invention, the entire molten metal filtration unit installed on the hearth of the filtration chamber is filtered by applying even pressure from the pair of pressing parts of the hydraulic jack. Towards a predetermined position along the inner wall surface of the room, the distal end face of the side plate in the hot water exit direction and the tap water outlet of the filtration chamber are It becomes possible to move in a well-balanced manner while maintaining a state in which the inner wall surface communicating with the inner wall surface is substantially parallel. As a result, the molten metal filtration unit can be fixed in a state in which the end surface of the side plate in the direction of hot water tap and the inner wall surface communicating with the tap hole of the filtration chamber are uniformly pressurized across the surface through the packing, and the molten metal filtration unit can be fixed. Airtightness is reliably maintained when the molten metal is discharged from the molten metal filtration unit, leakage of the filtered molten metal is effectively prevented, and the efficiency of filtration is increased.
Furthermore, since the molten metal filtration unit installation jig of the present invention has a simple configuration, the risk of failure is low, and fluctuations and defects from worker to worker or task to task are less likely to occur, allowing for reliable and efficient operation. becomes possible.

In addition, the casing of the molten metal filtration unit installation jig of the present invention has a top surface of the side plate and an end surface in contact with the lateral edge of the top surface of the side plate when the jig is attached to the molten metal filtration unit. It is possible to cover not only a part of the side plate but also a part of each surface in contact with the longitudinal periphery of the upper surface of the side plate (in other words, approximately vertically downward at both ends of the casing in the longitudinal direction). By being bent in this way, it is possible to reliably prevent the casing from shifting laterally when a pressing force is applied to the down plate and the side plate by the pair of pressing parts. Furthermore, by preventing the casing from shifting sideways once the jig is attached to the molten metal filtration unit, the molten metal filtration unit can be attached to the inner wall of the filtration chamber without the need for an operator to enter the filtration chamber. It can be firmly installed by pressing it into a predetermined position along the line, which further improves work efficiency.

FIG. 1(a) is a schematic diagram of a typical molten metal filtration unit to be installed by a molten metal filtration unit installation jig according to an embodiment of the present invention. FIG. 1(b) is a schematic cross-sectional view showing a state in which the molten metal filtration unit illustrated in FIG. 1(a) is placed on the hearth of the filtration chamber. Fig. 1(c) shows that the molten metal filtration unit illustrated in Figs. FIG. 3 is a schematic cross-sectional view showing a mechanism in which molten metal is subjected to a filtering operation while being moved and pressed to a predetermined position. FIG. 2(a) is a schematic front view showing a molten metal filtration unit installation jig according to an embodiment of the present invention. FIG. 2(b) is a schematic side view of the molten metal filtration unit installation jig according to the embodiment of the present invention shown in FIG. 2(a). FIG. 3(a) shows a molten metal filtration unit installation jig according to an embodiment of the present invention, and a molten metal filtration unit to which this jig is installed, which is installed on the hearth of a filtration chamber. FIG. 3 is a schematic diagram showing a state before attachment of the tool. FIG. 3(b) is a schematic diagram of a state in which the molten metal filtration unit installation jig according to the embodiment of the present invention shown in FIG. 3(a) is attached to the molten metal filtration unit in the filtration chamber. be. FIG. 4 shows a molten metal filtration unit installation jig according to an embodiment of the present invention after a wedge is provided to hold the molten metal filtration unit at a predetermined position along the inner wall surface of the filtration chamber. Shows the removed state. FIG. 5(a) shows the shape of the casing in the vicinity of the portion in contact with the longitudinal edge of the upper surface of the side plate of the molten metal filtration unit when installing the molten metal filtration unit installation jig according to an embodiment of the present invention. It is a cross-sectional schematic diagram showing an example. FIG. 5(b) is a schematic cross-sectional view showing another example of the shape of the casing in the vicinity of the portion that contacts the longitudinal edge of the upper surface of the side plate of the molten metal filtration unit when the casing is installed. FIG. 6 shows the distance relationship from the position where one of the pair of down plates extends on the casing to the other location on the casing in the molten metal filtration unit installation jig according to an embodiment of the present invention. It is a schematic diagram illustrating.

A molten metal filtration unit installation jig according to an embodiment of the present invention is for moving and pressing a molten metal filtration unit installed on the hearth of a filtration chamber to a predetermined position along the inner wall surface of the filtration chamber. It is used. The molten metal filtration unit to be installed by the molten metal filtration unit installation jig is not particularly limited as long as it includes a flat, substantially rectangular parallelepiped side plate at at least one end.

In order to facilitate understanding of the structure and function of a molten metal filtration unit installation jig, which will be described in detail later, a typical example of such a molten metal filtration unit will first be outlined with reference to FIG. 1.
In FIGS. 1(a) to (c), 1 is a molten metal filtration unit, 2A and 2B are a pair of side plates disposed at both ends of the filtration unit, and 3 is a plurality of ceramics for filtering impurities from the molten metal. A filtration tube, 3E is an opening on the outlet side of the filtration tube, 4 is a packing, 5 is a filtration chamber in which a molten metal filtration unit is arranged, 5B is a hearth of the filtration chamber, and 5E is a hole for discharging molten metal from the filtration chamber. The hot water outlet of the filtration chamber, 5W, is the inner wall surface of the hot water outlet side of the filtration chamber. The side plate 2B of the molten metal filtration unit 1 is a side plate disposed in the direction in which the molten metal comes out, and the side plate 2A is a side plate disposed in the opposite direction. Although not particularly limited, the packing 4 may be a substantially rectangular annular body as shown in the figure, and may be formed so as to surround the entire hot water outlet side opening 3E of the filtration tube. Hereinafter, the distal side surface of the side plate 2A of the filtration unit (the surface opposite to the paper surface of FIG. 1(a)) and the distal side surface of the side plate 2B of the filtration unit (the surface of the paper surface of FIG. 1(a)) The surfaces) may be referred to as the "distal surfaces" of the side plates, respectively, and the opposite surfaces of the side plates may be referred to as the "non-distal surfaces."

In order to prepare for the filtration work of molten metal, first, as shown in FIG. 1(b), the molten metal filtration unit 1 is moved from the outside of the filtration chamber 5 to the hearth 5B of the filtration chamber using a hanging jig or the like. can be installed. Next, as shown in FIG. 1(c), the molten metal filtration unit 1 is moved to a predetermined position along the inner wall surface 5W communicating with the tap outlet 5E of the filtration chamber, and is pressed and brought into close contact with the packing 4. can. The packing 4 is not particularly limited, but may be made of, for example, alumina fibers or ceramics that have excellent heat resistance (resistance to the heat of high-temperature molten metal) and pressure resistance (durability to continuous pressure during and after installation of the filtration unit). It may be made of fiber or the like. A non-limiting specific example of the material of the packing 4 includes a reaction product of basic aluminum chloride and silica. The filtration tube 3 is generally made of a porous ceramic material, and as the molten metal flows between the inner and outer surfaces of the filtration tube 3, as shown by the arrow in FIG. Foreign substances contained in the can be filtered and removed. Such movement and pressing/adhering of the molten metal filtration unit 1 to a predetermined position involves mixing of the molten metal that has been filtered by the filtration tube 3 of the molten metal filtration unit 1 with unfiltered molten metal, and mixing of the molten metal that has been filtered by the filtration tube 3 of the molten metal filtration unit 1 with the molten metal that has not been filtered. This is done in order to reliably prevent the filtered molten metal from leaking from the outlet side opening 3E of the filtration tube. That is, the end surface of the side plate 2B (side plate disposed in the direction of molten metal discharge) of the molten metal filtration unit 1 and the inner wall surface 5W communicating with the molten metal outlet 5E of the filtration chamber are uniformly disposed within the surface via the packing 4. It is desirable that the molten metal filtration unit 1 be fixed in a pressurized state. Such a desired fixed state can be obtained by the molten metal filtration unit installation jig according to one embodiment of the present invention described in the following paragraph.

FIGS. 2(a) and 2(b) schematically show a molten metal filtration unit installation jig according to an embodiment of the present invention. It should be understood that the molten metal filtration unit installation jig is not limited to the structure shown in this figure, and this figure is an example of the jig.
2(a) and (b), 10 is a molten metal filtration unit installation jig, 11 is a casing, 12a and 12b are a pair of strip-shaped down plates, and 13a and 13b are a pair of pressing parts of a hydraulic jack. , 14 is the operating section of the hydraulic jack, 14R is the manual operating lever of the hydraulic jack, 14P is the hydraulic pump of the hydraulic jack (the operating section 14 is composed of the manual operating lever 14R and the hydraulic pump 14P), 15 is the oil pressure gauge, 16a and 16b are a pair of hydraulic pipes (hydraulic hoses), and 17 is a gripping portion of the casing.

When the molten metal filtration unit installation jig 10 is used, the molten metal filtration unit installation jig 10 is installed on the upper part of the flat, substantially rectangular parallelepiped-shaped side plate at one end of the molten metal filtration unit as illustrated in FIGS. 1(a) to 1(c). will be installed on the At the time of this installation, the casing 11 includes at least the upper surface of the side plate at one end of the molten metal filtration unit; a portion of the end surface in contact with the lateral edge of the upper surface of this side plate; and the longitudinal direction of the upper surface of this side plate. It is formed so that these parts of the side plate can be continuously covered with respect to a part of each surface in contact with the peripheral edge of the direction. That is, the casing 11 is a plate-shaped body processed to match the shape of the molten metal filtration unit so that it can cover the upper part of the side plate at one end of the molten metal filtration unit. The plate-like body of the casing 11 may be formed from a single plate-like body, or may be a combination of a plurality of plate-like bodies joined together. Note that the term "continuous" regarding the coating mentioned here refers to a state in which the casing 11, which is the coating, is connected at any point without being physically separated into multiple members during the coating. This does not mean that there are no local voids.

The material of the casing 11 is not particularly limited, but may be made of metal such as steel or an alloy such as stainless steel. The thickness of the casing may be substantially uniform throughout or may vary from part to part, and may be, for example, from 3.0 mm to 40 mm, or from 5.0 mm to 30 mm. The casing 11 is usually formed from a single member, but may be formed from a plurality of members that can be combined. In the casing 11, a portion that covers a part of the end surface that is in contact with the lateral edge of the upper surface of the side plate at one end of the molten metal filtration unit, and each surface that is in contact with the longitudinal edge of the upper surface of this side plate. The portion covering a portion of the side plate may be bent approximately perpendicularly to the portion covering the upper surface of the side plate, that is, approximately vertically downward. In the casing 11, a portion that covers a part of the end surface that is in contact with the lateral edge of the upper surface of the side plate at one end of the molten metal filtration unit, and each surface that is in contact with the longitudinal edge of the upper surface of this side plate. The bending length of the part covering a part of the side plate extending substantially vertically downward from the part covering the upper surface of the side plate is not particularly limited, but from the viewpoint of stability during mounting and operability of mounting, for example, 1.0 cm. 20 cm, preferably 2.0 cm to 10 cm.

The casing 11 has a grip part 17 at its upper part, as shown in FIGS. It is also preferable to have the following. The shape, dimensions, arrangement, etc. of the grip portion 17 are not particularly limited as long as the grip portion 17 can be reliably gripped by the operator. The shape of the grip portion 17 may be bent into an inverted U shape, for example, as shown in FIG. 2(a). The lengthwise (horizontal) dimension of the gripping portion 17 may be, for example, about 10% to 40% of the maximum length of the casing 11 in the longitudinal direction. The grip part 17 can be arranged such that the center point of the longitudinal direction of the grip part 17 generally coincides with the center point of the casing 11 in the longitudinal direction, but the grip part 17 is not limited thereto. The gripping portion 17 may be disposed at the top of the casing 11, that is, on the top surface or near the end of the top surface. There is usually one gripping part 17, but a plurality of gripping parts 17 may be provided at substantially symmetrical positions with respect to the longitudinal center point of the casing 11.
As shown in FIG. 2(b), the grip portion 17 is preferably disposed at the upper portion of the casing 11 on the opposite side to the direction in which the down plates 12a and 12b are formed. It is more preferable that the grip portion 17 is disposed near the end of the casing 11 on the opposite side to the direction in which the down plates 12a and 12b are formed. By arranging the grip portion 17 at such a position, the efficiency of the work of attaching the jig 10 to the side plate 2A of the molten metal filtration unit 1 can be further improved, and the safety of the operator can also be improved.

A pair of band-like down plates 12a and 12b extend substantially vertically downward at two positions spaced apart from each other by a substantially equal distance from both ends of the casing 11 in the longitudinal direction. When the molten metal filtration unit installation jig 10 is mounted on the upper part of the flat, substantially rectangular parallelepiped-shaped side plate at one end of the molten metal filtration unit, the down plates 12a and 12b are mounted on the end surface of this side plate, respectively. It is formed so that it can come into contact with. The material of the down plates 12a and 12b is not particularly limited, but like the casing 11, it may be made of metal such as steel or an alloy such as stainless steel. Down plates 12a and 12b may have substantially the same shape. The shape of the down plates 12a and 12b is not particularly limited as long as they are band-like, but usually, their planar (vertical and horizontal) shapes are generally elongated rectangles, and their thicknesses may be approximately uniform. For example, in each of the down plates 12a and 12b, the length in the transverse direction may be 2.0 cm to 20 cm, and the length in the longitudinal direction may be 30 cm to 200 cm (or When the planar shape of the side plate of the molten metal filtration unit is approximately rectangular parallelepiped, 50% or more and less than 100% of the vertical dimension/substantially vertical dimension of the end face, or 60% or more and less than 100% of the said dimension, 70% of the said dimension % or more and 95% or less), and the thickness may be 3.0 mm to 40 mm. In particular, the thickness of each of the down plates 12a and 12b is preferably 4.0 mm to 20 mm, more preferably 5.0 mm to 10 mm. By setting the thickness of each of the down plates 12a and 12b within this range, it is possible to achieve a high level of both strength and efficiency of the attachment work to the side plate 2A.

The hydraulic jack includes a pair of pressing parts 13a and 13b, an operating part 14 comprising a manual operation lever 14R and a hydraulic pump 14P, and a pair of hydraulic pipes 16a and 16b connecting the pair of pressing parts 13a and 13b and the operating part 14. It is a member containing. The pair of pressing parts 13a and 13b are connected via a pair of hydraulic pipes 16a and 16b extending and branching from one hydraulic pump 14P, that is, two hydraulic pipes 16a and 16b. Near the branch point where one hydraulic pipe extending from one hydraulic pump 14P branches into two hydraulic pipes 16a and 16b, there is optionally a hydraulic pressure gauge 15 for monitoring the hydraulic pressure, as shown in the figure. can be provided. The type, structure, and material of the pressing parts 13a and 13b of each member of the hydraulic jack, the operating part 14 composed of the manual operating lever 14R and the hydraulic pump 14P, and the oil pressure gauge 15 are those commonly used in the industry. may be selected as appropriate.

When the molten metal filtration unit installation jig 10 is mounted on the upper part of the flat, substantially rectangular parallelepiped side plate at one end of the molten metal filtration unit, the pair of pressing parts 13a and 13b are respectively connected to the pair of down plates. It is configured so that it can be placed below the surface of each of 12a and 12b that is not in contact with the side plate (the surface in the opposite direction from the surface in contact with the side plate). It is preferable that the two pressing points (center points of the pressing parts) of the pair of pressing parts 13a and 13b coincide in the horizontal direction. From the viewpoint of pressing efficiency, the pressing point of each of the pair of pressing parts 13a and 13b is determined by its length in the longitudinal direction (vertical direction) with reference to the lowest point of the non-contact surface with the side plate of each of the down plates 12a and 12b. 50% or less, preferably 40% or less, 30% or less, 20% or less, or 10% or less, and may be located at a position exceeding 0%.

A pair of pressing parts 13a and 13b configured to be able to be placed below the surfaces of the pair of down plates 12a and 12b that do not come in contact with the respective side plates are each comprised of a manual operation lever 14R and a hydraulic pump 14P. It is connected to the operating section 14 via a pair of hydraulic pipes 16a and 16b. Since the pair of pressing parts 13a and 13b have a structure extending and branching from one hydraulic pump 14P, the hydraulic pressure (pressing force) applied from the pressing parts 13a and 13b to each of the pair of down plates 12a and 12b is usually become equal values. The material of the hydraulic pipes (hydraulic hoses) 16a and 16b is not particularly limited, but may be made of, for example, synthetic rubber that has excellent oil resistance and flexibility, and preferably has excellent abrasion resistance and weather resistance. The lengths of the hydraulic pipes (hydraulic hoses) 16a and 16b are determined by attaching the jig 10 to the upper part of the side plate of the molten metal filtration unit, and attaching the pair of pressing parts 13a and 13b to the side plate of each of the pair of down plates 12a and 12b, respectively. It is preferable that the length is such that when the hydraulic jack is disposed below the non-contact surface, the operating part 14 of the hydraulic jack can be placed outside the filtration chamber and operated.

In the hydraulic jack, by operating the manual operation lever 14R in the operating section 14, the hydraulic pressure equally applied to the pressing sections 13a and 13b from one hydraulic pump 14P can be adjusted as appropriate. In this figure, a manual operation lever 14R is used to adjust the oil pressure of the hydraulic jack, but the invention is not limited to this, and an automatic control system by setting the oil pressure to a predetermined oil pressure may also be used. By providing the oil pressure gauge 15 near the branch point of one hydraulic pipe from the hydraulic pump 14P to the hydraulic pipes 16a and 16b, the oil pressure applied to the pressing parts 13a and 13b can be accurately monitored. It's advantageous.

The casing 11 of the molten metal filtration unit installation jig 10 according to the embodiment of the present invention illustrated in FIGS. It can be attached to one side plate 2A of the molten metal filtration unit 1 installed in the molten metal filtration unit 1. At the time of this installation, the side plate 2A of the molten metal filtration unit 1, that is, the upper surface of the side plate in the opposite direction of the side plate 2B disposed in the direction of molten metal discharge; A portion of the surface; and a portion of each surface in contact with the longitudinal periphery of the upper surface of the side plate 2A are continuously covered by the casing 11. In addition, from the viewpoint of more secure attachment, in addition to these parts of the side plate 2A, as shown in the figure, a part of the non-terminal surface in contact with the lateral edge of the upper surface of the side plate 2A is also continuous with the casing 11. It is also preferable that the material be coated. Thereby, the casing 11 is configured to be able to continuously cover a portion of the upper surface of the side plate 2A and all surfaces in contact with the periphery thereof. By installing the casing 11 so as to completely cover the upper part of the side plate 2A in this way, a more stable pressing operation becomes possible, thereby moving the molten metal filtration unit 1 to the intended position more accurately. It becomes possible to do so.

3(a) and (b) show that a molten metal filtration unit installation jig 10 according to an embodiment of the present invention is attached to a molten metal filtration unit 1 placed on the hearth of a filtration chamber 5. The outline of the state before and after is shown. Therefore, in each of FIGS. 3(a) and 3(b), the position of the molten metal filtration unit 1 placed on the hearth of the filtration chamber 5 remains unchanged, and this It may be considered that the position is substantially the same as that of the molten metal filtration unit 1.
As shown in FIG. 1(b), from above to below the side plate 2A, which is a side plate in the opposite direction to the side plate 2B disposed in the molten metal tapping direction of the molten metal filtration unit 1 installed on the hearth of the filtration chamber 5. As shown in FIGS. 3(a) and 3(b), the molten metal filtration unit installation jig 10 according to an embodiment of the present invention can be mounted so as to cover the unit (FIG. 3(a) (see arrow inside). By using the grip portion 17, the mounting operation can be performed more efficiently and safely. When the jig 10 is attached to the side plate 2A of the molten metal filtration unit 1, a pair of strip-shaped down plates 12a and 12b extending substantially vertically downward from the casing 11 are attached to the ends of the side plate, respectively. It may be in contact with the surface. In FIG. 3(b), the down plates 12a and 12b are not shown because they are located on the back side of the page. 3(a) and (b) show a configuration in which a part of the non-terminal surface (the surface opposite to the terminal surface) in contact with the lateral edge of the upper surface of the side plate 2A is also continuously covered by the casing 11. is shown as an example, but is not limited to this.

As shown in FIG. 3(b), when the jig 10 is attached to the side plate 2A of the molten metal filtration unit 1, a pair of pressing portions 13a and 13b having a structure extending and branching from one hydraulic pump 14P, Equal oil pressure (pressing force) may be applied to each of the pair of down plates 12a and 12b. Further, the hydraulic pressure (pressing force) applied by the pressing parts 13a and 13b is more than 0 MPa (for example, 0.5 MPa or more), and the molten metal filtration unit 1 can be moved reliably and safely to the desired position. From the viewpoint of performance, it may be set as appropriate to a predetermined upper limit or less, for example, 4 MPa or less or 3 MPa or less. As a result, the molten metal filtration unit 1 is moved from the position shown in FIGS. 3(a) and 3(b) (substantially the same as the position shown in FIG. 1(b)) to the position shown in FIG. 1(c) in the filtration chamber. In other words, it can be moved to a predetermined position along the inner wall surface 5W communicating with the tap water outlet 5E of the filtration chamber, and pressed and brought into close contact with the packing 4. From the viewpoint of achieving sufficient adhesion between the molten metal filtration unit 1 and the inner wall surface 5W, for example, the thickness of the packing 4 is reduced to approximately 30 to 90% (that is, to the extent that the difference in thickness is reduced by approximately 10 to 70%). ) It is preferable to apply a pressing force until it is compressed.

By using the molten metal filtration unit installation jig 10 in this manner, as shown in FIG. The molten metal filtration unit 1 can be fixed at an intended position in a state where the inner wall surface 5W communicating with the tap outlet 5E of the chamber is uniformly pressurized through the packing 4. Furthermore, since the molten metal filtration unit installation jig 10 has the above-described configuration, the molten metal that has been filtered by the filtration tube 3 of the molten metal filtration unit 1 and the unfiltered molten metal can be mixed together, and the molten metal that has not been filtered can be mixed with the molten metal from the filtration tube 3. Leakage of the filtered molten metal from the outlet side opening 3E of the filter tube can be effectively suppressed.
Furthermore, in addition to the above-mentioned specific structure of the casing 11 and down plates 12a and 12b, the molten metal filtration unit installation jig 10 includes a pair of hydraulic pipes connected via two hydraulic pipes extending from one hydraulic pump and branching out. Because it has a simple configuration including a pressing part, there is less risk of failure in the operation and control system, etc., and it is less prone to fluctuations and malfunctions from worker to worker or task to task, allowing for reliable and efficient operation. become.

In addition, the casing 11 of the molten metal filtration unit installation jig 10 is mounted on the upper surface of the side plate 2A and the side plate in a state where the jig 10 is attached to the side plate 2A of the molten metal filtration unit 1 as shown in FIG. 3(b). It is possible to continuously coat not only a part of the end surface in contact with the lateral edge of the upper surface of the side plate 2A, but also a part of each surface in contact with the longitudinal edge of the upper surface of the side plate 2A. (that is, bent substantially vertically downward at both longitudinal ends of the casing 11). Such a structure reliably prevents the casing 11 from shifting laterally when the pair of pressing parts 13a and 13b applies pressing force to the down plates 12a and 12b and the side plate 2A, and furthermore, after installing the jig 10, the operator There is no need for the person to enter the filtration chamber, and the molten metal filtration unit 1 can be pressed and securely installed at a predetermined position along the inner wall surface 5W of the filtration chamber, which further improves work efficiency. can get.

In one embodiment, the molten metal filtration unit 1 is disposed between a pair of strip-shaped down plates 12a and 12b extending substantially vertically downward from the casing 11 of the molten metal filtration unit installation jig 10. It is a fixture that maintains the pressed state when pressed by the tool 10 via the packing 4 at a predetermined position along the inner wall surface 5W of the filtration chamber and prevents the filtration unit 1 from moving from the predetermined position. A space may be provided so that the wedge 18 can be inserted. Although the shape of the wedge 18 is not particularly limited, it is typically formed into a roughly rectangular shape. The thickness of the wedge 18 may be adjusted as appropriate so that it can sufficiently perform the function of preventing movement and fixing. The wedge 18 may be made of metal such as steel or an alloy such as stainless steel, or may be made of ceramic such as alumina, as described above for the casing 11 and the down plates 12a and 12b. The down plates 12a and 12b may have a spacing greater than or equal to the dimension (ie, width) in the direction perpendicular to the insertion direction of the wedge 18, at least partially, preferably substantially entirely.

The wedge 18 communicates with the side plate 2A, which is a side plate in the opposite direction to the side plate 2B arranged in the molten metal outlet direction of the molten metal filtration unit 1, and the inner wall surface of the filtration chamber facing it (i.e., the outlet 5E of the filtration chamber). The inner wall surface 5W may be disposed between and in contact with the inner wall surface 5W and the inner wall surface in the opposite direction. After moving the molten metal filtration unit 1 to the predetermined position shown in FIG. The wedge 18 can be inserted from above into the space between the down plates 12a and 12b while being uniformly pressurized across the plane. The wedge 18 may be inserted using its own weight and/or by applying an external force, for example with a tool such as a hammer. The degree of insertion of the wedge 18 is not particularly limited as long as the pressed state of the molten metal filtration unit 1 can be stably maintained; It is preferable that In other words, in the space between the down plates 12a and 12b, preferably a majority of the vertical length of the side plate 2A, more preferably substantially the entire vertical length of the side plate 2A, is formed by the wedge 18 having a predetermined shape. The wedge 18 may be large enough to be inserted until it comes into contact with the wedge 18.

After the wedge 18 is inserted and arranged, as shown in FIG. 4, the molten metal filtration unit installation jig 10 can be removed from the side plate 2A. As a result, the molten metal filtration unit 1 can be stably fixed at the intended position in a state where the end surface of the side plate 2B and the inner wall surface 5W of the filtration chamber are uniformly pressurized through the packing.

When installing the molten metal filtration unit installation jig 10 according to an embodiment of the present invention, the shape 11s of the casing 11 in the vicinity of the portion that contacts the longitudinal edge of the upper surface of the side plate 2A of the molten metal filtration unit 1 is as follows: As shown in the cross section of FIG. 5(a), it may be bent approximately vertically.
As another preferable example, the shape 11r of the casing 11 in the vicinity of the portion in contact with the longitudinal edge of the upper surface of the side plate 2A of the molten metal filtration unit 1 when installing the molten metal filtration unit installation jig 10 is as shown in FIG. As shown in cross section in (b), at least a portion of the side plate 2A may have a curved surface when viewed horizontally from the upper surface of the side plate 2A. In this way, by having the curved surface near the point where the casing 11 touches the longitudinal edge of the upper surface of the side plate 2A, operator safety and jig operability are greatly improved, and the side plate 2A is Even if the end of the casing 11 accidentally collides with the inner wall of the filtration chamber during the covering operation, scratches and damage to the inner wall can be effectively prevented.

FIG. 6 shows a diagram on the casing 11 from a position where one of the pair of down plates 12a extends on the casing 11 in the casing 11 of the molten metal filtration unit installation jig 10 according to an embodiment of the present invention. The relationship between distances to other locations is illustrated.
Here, the distance _n1 from the position where the down plate 12a extends on the casing 11 to the nearer end of the casing 11 in the longitudinal direction is the center point of the down plate 12a on the casing 11 in the width direction. This is the vertical distance between the vertical line B passing through and the vertical line _A1 passing through the end of the casing 11 on the down plate 12a side. Further, the distance m from the position where the down plate 12a extends on the casing 11 to the center point of the casing 11 is the distance m between the vertical direction line B passing through the center point in the width direction of the down plate 12a on the casing 11 and the casing. This is the vertical distance from the vertical line C passing through the center point of No. 11. Further, the distance _n2 from the position where the down plate 12a extends on the casing 11 to the other longitudinal end of the casing 11 passes through the center point of the down plate 12a on the casing 11 in the width direction. This is the vertical distance between the vertical line B and the vertical line _A2 passing through the end of the casing 11 on the down plate 12b side.

At this time, the ratio n ₁ /m of n ₁ to m may be generally in the range of 0.1 or more and 8 or less, preferably in the range of 0.2 or more and 6 or less, and more preferably 0.2 It may be in a range of 5 or more. Furthermore, since the relationship 2m+n ₁ ≈n ₂ holds true, (n ₂ -2m)/m may be generally in the range of 0.1 or more and 8 or less, preferably 0.2 or more and 6 or less, as above. It may be within a range, and more preferably within a range of 0.2 or more and 5 or less. The pair of down plates 12a and 12b extend substantially vertically downward at two positions spaced apart from each other by a substantially equal distance from both longitudinal ends of the casing 11, so the positional relationship regarding the down plates 12a will be described here. The normal and preferred numerical ranges described may similarly apply to the down plate 12b.
When the distance relationship from the position where each of the pair of down plates 12a and 12b extends on the casing 11 to other locations on the casing 11 satisfies such numerical range, the pair of pressing parts 13a and 13b It is possible to apply a more even pressure load. As a result, the entire molten metal filtration unit installed on the hearth of the filtration chamber is directed toward a predetermined position along the inner wall surface of the filtration chamber, and is communicated with the end surface of the side plate in the direction of hot water exit and the tap outlet of the filtration chamber. It becomes possible to move with better balance while reliably maintaining the state in which the inner wall surface is substantially parallel.

Up to this point, the molten metal filtration unit installation jig according to the present invention has been described using specific embodiments, but it is not intended to be limited to these embodiments. In particular, the molten metal filtration unit installation jig according to the present invention can be applied to any molten metal filtration unit as long as it is configured to include a flat, substantially rectangular parallelepiped side plate at at least one end. Note that it may also be applied. A molten metal filtration unit to which the molten metal filtration unit installation jig according to the present invention can be applied includes a pair of side plates disposed at both ends of the filtration unit illustrated in the above-described specific embodiment, and a plurality of ceramic It is not limited to those equipped with a manufactured filtration tube. The scope of subject matter that may be encompassed by the invention is to be determined by the appended claims.

The molten metal filtration unit installation jig according to the present invention is used to move and press the molten metal filtration unit installed on the hearth of the filtration chamber to a predetermined position along the inner wall surface of the filtration chamber. It will be done.
According to the molten metal filtration unit installation jig of the present invention, the end face of the side plate in the pouring direction of the molten metal filtration unit and the inner wall surface communicating with the tap outlet of the filtration chamber are uniformly pressurized within the plane through the packing. The molten metal filtration unit can be fixed in this state, effectively preventing leakage of the filtered molten metal and increasing the efficiency of filtration. In addition, the casing of the molten metal filtration unit installation jig of the present invention is bent substantially vertically downward at both ends in the longitudinal direction, so that the down plate and the molten metal filtration unit are formed by a pair of pressing parts. Lateral displacement of the casing when pressure is applied to the side plate of the casing can be reliably prevented. Furthermore, the molten metal filtration unit installation jig of the present invention has a simple configuration, so the risk of failure is low, and fluctuations and defects from worker to worker or task to task are less likely to occur, allowing for reliable and efficient operation. It becomes possible. Due to these advantages, the molten metal filtration unit installation jig according to the present invention can be used very suitably and easily for moving and pressing the molten metal filtration unit to a predetermined position within the filtration chamber.

1: Molten metal filtration unit 2A, 2B: A pair of side plates 3: A plurality of ceramic filtration tubes 3E: Outlet side opening of the filtration tube 4: Packing 5: Filtration chamber 5B: Hearth of the filtration chamber 5E: Outlet of the filtration chamber Sprue 5W: Inner wall surface on the outlet side of the filtration chamber 10: Jig for installing the molten metal filtration unit 11: Casing 11s, 11r: Shape of the casing 11 near the point in contact with the longitudinal periphery of the upper surface of the side plate 2A 12a, 12b: Pair Down plate 13a, 13b: Pair of pressing parts 14: Operating part of hydraulic jack 14R: Manual operation lever 14P: Hydraulic pump 15: Oil pressure gauge 16a, 16b: Pair of hydraulic pipes 17: Gripping part of casing 18: Wedge _n1 : Distance from the extended position of the down plate 12a (line B) to the longitudinal end of the casing 11 (line A ₁ ) m: From the extended position of the down plate 12a (line B) to the center point of the casing 11 (line C) Distance n ₂ : Distance from the extended position of the down plate 12a (line B) to the other longitudinal end of the casing 11 (line A ₂ )

Claims (9)

A molten metal filtration unit installation jig for moving and pressing the molten metal filtration unit installed on the hearth of the filtration chamber to a predetermined position along the inner wall surface of the filtration chamber,
The molten metal filtration unit is configured to include a flat, substantially rectangular parallelepiped-shaped side plate at at least one end,
The jig includes a casing, a pair of strip-shaped down plates, and a hydraulic jack,
i) When the jig is attached to the molten metal filtration unit, the casing includes at least the upper surface of the side plate; a part of the end surface in contact with the lateral edge of the upper surface of the side plate; The side plate is formed to be able to continuously cover a portion of each surface in contact with the longitudinal periphery of the upper surface of the side plate, and the short side of the upper surface of the side plate of the casing Both a portion covering a portion of the end surface in contact with the longitudinal periphery of the upper surface of the casing and a portion covering a portion of each surface contacting the longitudinal periphery of the upper surface of the side plate of the casing continuously It is bent approximately vertically downward from the part that covers the top surface of the side plate.
ii) The pair of band-shaped down plates extend substantially vertically downward at two positions spaced apart from each other by a substantially equal distance from both ends of the casing in the longitudinal direction, and the jig extends substantially vertically downward from the metal Each down plate is formed so as to be able to come into contact with the end surface of the side plate when attached to the molten metal filtration unit,
iii) The hydraulic jack includes one hydraulic pump and a pair of pressing parts connected via two hydraulic pipes extending and branching from the one hydraulic pump, and the jig is connected to the molten metal filtration unit. In the state where the pair of pressing parts are mounted on the holder, each of the pair of pressing parts is configured to be able to be placed below the surface of the pair of strip-shaped down plates that does not come into contact with each of the side plates.
Jig for installing molten metal filtration unit. Fixing that maintains the pressed state when the molten metal filtration unit is pressed by the jig at a predetermined position along the inner wall surface of the filtration chamber and prevents the molten metal filtration unit from moving from the predetermined position. 2. The molten metal filtration unit installation jig according to claim 1, wherein a predetermined space is formed between the pair of strip-like down plates so that a wedge can be inserted therein. The molten metal filtration unit installation jig according to claim 1, wherein a hydraulic pressure gauge is installed near a location where a hydraulic pipe extending from the hydraulic pump branches. The casing is formed so that it can also cover a part of the non-end surface that is in contact with the lateral edge of the upper surface of the side plate, so that the casing covers the upper surface of the side plate and its periphery. The molten metal filtration unit installation jig according to claim 1, which is configured to be able to continuously coat a portion of all contacting surfaces. n ₁ is the distance from the position where each of the pair of strip-shaped down plates extends on the casing to each nearer end in the longitudinal direction of the casing, and from this position to the center of the casing. The molten metal filtration unit installation jig according to claim 1, wherein when the distance to the point is m, the ratio of _n1 to m is set to be in a range of 0.2 or more and 6 or less. The molten metal filtration unit installation jig according to claim 1, wherein the casing includes a grip portion at an upper portion. The molten metal filtration unit installation jig according to claim 6, wherein the gripping portion is disposed at an upper portion of the casing on a side opposite to the direction in which the down plate is formed. The molten metal filtration unit installation jig according to claim 1, wherein the casing has a curved surface near a portion where it contacts a longitudinal edge of the upper surface of the side plate. The molten metal filtration unit installation jig according to claim 1, wherein the pressing force by the hydraulic jack is set to be less than or equal to a predetermined upper limit.

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