JP2525271B2 - Molding core with detachment mechanism in lining construction equipment for ladle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a core for building an inner peripheral wall of a molten metal pot, which is filled with an irregular shaped refractory material when a molten metal pot such as a hot metal ladle and a steel ladle is constructed. The present invention relates to a molding core with a separation mechanism, which can be easily separated when the core is pulled out after molding, and which is capable of filling and molding an unshaped refractory material in the bottom of a molten metal ladle.

<Conventional Technology> When a casting pot, a hot metal ladle, etc. is conventionally constructed, when the core that should be the inner peripheral wall of the building machine is pulled out after molding, the core is stuck to the outer periphery of the structure. It is extremely difficult to remove it, and it takes a lot of time and labor and the core is easily damaged. Therefore, the applicant of the present application filed Japanese Patent Publication No. 51-944 (molding core with a detachment mechanism in a lining construction device such as a cylinder) as a core that solves the above-mentioned drawbacks. The present invention relates to a molding core with a detachment mechanism, which is formed by longitudinally cutting one portion of a core, has both free ends thereof in a butt shape, and interposing an advancing / retreating device for generating an attractive force between the both free ends. Is.

As shown in FIG. 13, this molding core with a detachment mechanism has a refractory brick c preliminarily laid on the bottom of an outer peripheral wall b of a steel pot a, and the refractory brick c is provided with the detachment mechanism. The molding core c is placed, and the space d between the inner peripheral wall of the pan a and the outer peripheral wall of the molding core c with the detachment mechanism is filled with an indeterminate refractory material.

<Problems to be solved by the invention> However, in order to install the refractory brick c on the bottom of the pot a,
In addition to requiring advanced construction technology, it requires time and labor, and in recent years, it has been attempted to fill the bottom of the pan a with an irregular-shaped refractory material. In this case, the bottom of the pot a is filled with an amorphous refractory material in advance, and the core is placed after sufficient curing. However, in this case, there is a problem that it takes more days than necessary depending on the curing period. Therefore, it has been attempted to fill the amorphous fireproof material to the bottom with a core.
The particles of the amorphous refractory material are large, and it is impossible to fill the bottom portion sufficiently tightly.

In the present invention, in order to solve the above problems, in the inner bottom of the core, the bottom plate opening and closing device and the centering device, the floating prevention locking device, the bottom pressing device, for automatically filling the irregular refractory material and for pressing the vibration device, An object of the present invention is to provide a molding core with a detachment mechanism equipped with a swinging machine-like vibrating device and the like.

<Means for Solving the Problems> The above object of the present invention can be achieved by the following configurations. That is, the gist of the invention is that at least one part of the outer peripheral wall of the cylindrical core body having a bottom portion made of heat-resistant flexible material is vertically cut, and both free ends thereof are butt-shaped, and between the free ends. In addition to interposing an advancing / retreating device for generating an attractive force, a plurality of centering devices for adjusting the spatial distance between the core body and the pot container are provided around the inside of the core body, and further on the outer peripheral edge of the lower end of the core body. , A bottom portion that can be freely connected by an appropriate means is provided, and a bottom opening / closing device that freely closes the indefinite refractory inlet is further provided in the center of the bottom portion, and a plurality of bottom pressing devices that detach the bottom portion upward are provided. In order to bridge the core body into the pot container, a core support portion that locks at the opening end of the pot container is projected horizontally at the opening edge of the core body, and the core support portion is provided. Equipped with a level adjuster,
Further, at the tip of the core support portion located in the trunnion of the pot container, there is provided an anti-floating lock device which is freely moored to the trunnion. In the core body, at least one revolving arm that revolves on the space between the pot container and the outer peripheral wall of the core body, and a bar-shaped vibrator that can be moved up and down by the revolving arm. 1 is a molding core with a detachment mechanism in a lining construction apparatus for a molten metal ladle, which is constructed by constructing an automatic swiveling rod-shaped vibrating device.

<Example> A molding core with a release mechanism according to the present invention will be described below in detail with reference to the drawings showing an example.

FIG. 1 is a front sectional explanatory view showing an outline of a molding core with a detachment mechanism of the present invention, and FIG. 2 is a plan explanatory view of the same.

In the figure, (1) is a core body having a bottom part (2) connected and integrated, and the outer peripheral wall of the core body (1) is made of a heat-resistant flexible material and is shown in FIG. As described above, one portion of the outer peripheral wall (3) of the core body (1) is longitudinally cut so that both free end portions (4), (4) of the core body (1) are butt-shaped, and both free end portions (4), An advancing / retreating device (5) for generating an attractive force is interposed between (4), and the advancing / retreating device (5) is
Intervening piece (6) arranged between both free ends (4), (4)
And a movable device (7) composed of a hydraulic cylinder that moves the intervening piece (6).

That is, the interposition piece (6) is rotatably supported at its one end by the pivot portion (9) on the reinforcing frame (8) provided on the inner periphery of the core body (1) at the center of the circle. , Intervening piece (6)
The other end thereof is pivotally supported by the tip of the L-shaped lever (10). The turning point (11) of the L-shaped lever (10) is pivotally supported by the reinforcing frame (8) so as to face the pivotal shaft portion (9), and the other end of the L-shaped lever (10) is at the other end. It is connected to the movable device (7). Therefore, the intervening piece (6) can be freely inserted into or removed from both free ends (4) and (4) by expansion and contraction of the movable device (7) composed of a hydraulic cylinder with the pivot portion (9) as a fulcrum. It is a mechanism that can be performed. Next, (12) in FIG. 1 is a hook connecting portion at the time of pulling out work by a crane, and (13) shows a centering device. In the centering device (13), the centering rod portion (14) is provided in a centering hole (15) penetrating the outer peripheral wall (3) of the core body (1) so as to freely penetrate therethrough. The centering rod portion (14) is connected to the hydraulic cylinder (17) via the push-out lever (16), and the extension length of the hydraulic cylinder (17) adjusts the protruding length to the outside of the core body (1). However, as shown in FIG. 2, the centering devices (13) are installed in the core body (1), four by 90 ° each.

In addition, three bottom holding devices (18) are installed on the bottom (2) of the core body (1), each 120 °, and the bottom holding hole (19) penetrates the bottom (2). The bottom holding bar (20) is provided so as to freely project downward into the bottom holding hole (19). The bottom holding bar (20) is provided with a bottom (2) as shown in FIG. It is supported by a gate-shaped support portion (21) installed on the bridge, and can be projected downward by expansion and contraction of a hydraulic cylinder (17) mounted on the gate-shaped support portion (21).

The bottom presser bar (20) projects downward, and the tip of the bottom presser bar (20) seals the bottom presser hole (19) as shown in the figure when the irregular refractory material is put in. It is a mechanism that closes like a lid.

Next, as shown in FIG. 4, the bottom part (2) of the core body (1) is provided with a bottom opening / closing device (22) which can be opened and closed by a hydraulic cylinder (17) at the center thereof.
The bottom opening / closing device (22) has a bottom (2) as shown in FIG.
The mechanism is such that an irregularly shaped refractory material inlet (23) penetrating in the center can be closed or opened in a hermetically sealed manner by an opening / closing lid (24). Further, a plurality of windows (25), (25) ... Are pierced through the periphery of the bottom (2), and the windows (25), (25)
... are fitted with lids (26), (26), which are closed in a hermetic manner.

The lids (26), (26) ... Have a mechanism that can be manually opened or closed by a tool or the like.

Further, as shown in FIGS. 7 and 8, the bottom portion (2) serves as a connecting mechanism between the bottom portion (2) and the outer peripheral wall of the core body (1).
Flange portions (27) and (27 ') are provided inwardly around the upper end peripheral portion and the lower peripheral edge portion of the outer peripheral wall of the core body (1).
The flange portion (27 ') on the core body (1) side is provided with elongated holes (28), (28) ... at regular intervals, and as shown in FIG. This is a mechanism for connecting the bottom portion (2) and the outer peripheral wall of the core body (1) from the flange portion (27) by means of connecting and fastening members (29) such as bolts and nuts.

Reference numeral (30) indicates a packing member for maintaining airtightness between the flange portions (27) and (27 '). In addition to the mechanism described in detail above, various mechanisms are conceivable as a mechanism for connecting the bottom portion (2) and the outer peripheral wall of the core body (1), and the most suitable mechanism depending on the situation. It is desirable to adopt.

Next, the core body (1) is supported on the outer peripheral edge portion B of the pan container A by the core body supporting portions (31) projecting from the upper end of the core body (1) in four directions. A core level adjusting device (32) is installed in each core supporting part (31), (31) .... As shown in FIG. 9, this core level adjusting device (32) has a level adjusting plate part (33) connected to the tip of a hydraulic cylinder (17) built in the core supporting part (31). The level adjusting plate portion (33) is placed on the reinforcing strip C provided around the outer peripheral wall of the pan container A, and the upper end surface of the reinforcing strip C is pressed by the expansion and contraction of the hydraulic cylinder (17). Accordingly, the core support portion (31) is moved in the vertical direction to freely adjust the level of the core body (1). Furthermore, at the tips of the core support parts (31), (31) located in the trunnion D direction projectingly provided on the outer peripheral wall of the pan container A, the floating prevention lock device (3
4) is provided. As shown in FIG. 10, this floating prevention lock device (34) has a hydraulic cylinder (1
7) Locking part (36) with pivot (35) as fulcrum
Is rotated by 90 ° and is anchored to a locking portion E formed at the tip of the trunnion D of the pot container A to firmly prevent the core body (1) from floating.

Next, FIG. 11 and FIG. 12 are a plan explanatory view and an internal mechanism explanatory view when the automatic swiveling rod-shaped vibrating device (37) is installed in the core body (1).

As shown in the figure, a swivel post (39) is rotatably supported by a central column (38) having a hook connecting part (12) attached to its tip, and the swivel post (39) has three pivot posts. The swivel arms (40), (40), (40) are arranged, and three beams (41) supporting the central column (38) are installed under the swivel arms (1) around the core body (1), It is something that is fixed.

The three swivel arms (40) attached to the swivel post (39) support holding guides (42) for holding the three bar-shaped vibrators (41), respectively. 41) is the drive source motor (43), which is the source of vibration,
It is composed of a vibrating body (44) that causes vibration and a power transmission shaft (45) having flexibility. The vibrating body (44) is hung from the swing arm (40) in a suspended state, and is lifted (46).
It can be moved up and down by.

The structure of this elevator (46) is, for example, provided with a pinch roller (not shown) at substantially the center of the holding guide (42), and a resistance when the rod-shaped vibrator (41) moves up and down in the middle of the holding guide (42). Several rollers (47) are provided to reduce
One end of the holding guide (42) is supported by a pin (48) at the tip of the swing arm (40), and the other points are held by the holding guide (42).
Is held by a slide plate (49) so that it can slide slightly. The pinch roller (not shown) is driven by the drive motor (50), and therefore the drive moves the vibrating body (44) and the drive source motor (43) up and down.
Further, a guide rod (51) for guiding the drive source motor (43) to eliminate the vibration of the drive source motor (43) itself and to move up and down smoothly is provided along the side of the central column (38). The guide bar (52) is fixed at the upper and lower ends.

A swivel post (39), which is rotatably supported above the central column (38), swivels by a swivel device (52). The swivel device (52) includes a swivel motor (53) and a gear (54a). ),(Five
4b), (54c) and swivel axis (55) etc., beam (41)
It is fixed to. Bearings (56a) and (56b) are interposed between the beam (41) and the central cylinder (38), and the swivel shaft (55)
The swivel gear (54b) that pivotally supports the gears (54c), (54
Power is transmitted via d) and the turning post (39) is turned. The post (39) is supported by the central column (38) via a bearing.

In this embodiment, since three swivel arms (40) are attached, the swivel arm (40) is swung 120 ° to give vibration.
It is conceivable that the number of swivel arms (40) may be one, or two or more, and in that case, the swivel angle is determined according to the number.

<Operation> The molding core with a disengagement mechanism of the present invention has the above-mentioned structure. Next, the operation will be described in detail. First, as shown in FIG. Core body (1)
The centering device (13) is used to install the centering rod (14).
After adjusting the protruding length, it is held in the pot container A.

That is, the centering rod portion (14) can adjust the spatial distance between the core body (1) and the inner peripheral wall of the pot container A, and after being installed at an arbitrary position, the core level adjusting device (32) is used. The level of the core body (1) is adjusted, and the core body (1) is firmly installed in the pan container A by the lifting prevention lock device (34). Next, the centering rod part (14) is returned into the core body (1), and an irregularly shaped refractory material is put into the space between the pot container A and the core body (1) by a charging chute (not shown). After being put into the section F, three vibrating bodies (44) of each rod-shaped vibrator (41) of the automatic swiveling rod-shaped vibrating device (37) are simultaneously or individually lowered and placed in the already-arranged irregular refractory material. The swivel arm (40) is rotated by submerging and vibrating the vibrating body (44).

On the other hand, in the space E'between the bottom portion (2) of the core body (1) and the bottom portion of the pan container A, the opening / closing lid portion (24) of the bottom opening / closing device (22) of the bottom portion (2) is opened. , Inject the irregular refractory material into the bottom space E'by a charging chute (not shown) from the irregular refractory material inlet (23) and open the lid (26) of each window (25). By observing the filling state and vibrating by a separate vibrating machine (not shown), the irregular space refractory material is filled in the bottom space portion F '. And each part of the sky F,
After the filling into the F'is completed, the opening / closing lid (24) and lid (26) are hermetically sealed, and after curing the irregular-shaped refractory material sufficiently, the lock portion of the floating prevention lock device (30) The lock by (32) is released, and then the connection between the bottom portion (2) and the outer peripheral wall of the core body (1) is fastened to the flange portions (27), (27 '). The fastening is released by loosening, and the intervening piece (6) of the advancing / retreating device (5) is further removed from between the free ends (4) and (4) by the movable device (7), and the core body (1) is removed. By reducing the diameter of the core, and then projecting the bottom pressing rod (20) of each bottom pressing device (18) of the bottom (2) downward so that the core body (1) is disengaged upward and Lifted and the operation was completed.

<Effects of the Invention> As described above, according to the present invention, it is possible to easily remove the sticking of the core to the molded product without difficulty, and to reliably and easily perform the molded product on the bottom of the pan container. , Work efficiency is improved much more than before. Further, as compared with the conventional case, it is not necessary to lay a refractory brick on the bottom of the pot container, and it is possible to obtain various effects such as extra labor and a drastic reduction in the number of manufacturing days.

[Brief description of drawings]

FIG. 1 is a front cross-sectional explanatory view showing the outline of a molding core with a release mechanism according to the present invention, FIG. 2 is an explanatory plan view of the same, FIG. 3 is an explanatory view of a release mechanism according to the present invention, and FIG. FIG. 5 is an explanatory view showing the bottom of the core body of the invention, FIG. 5 is an enlarged explanatory view of the bottom pressing device of the present invention, FIG. 6 is an explanatory view showing the bottom opening / closing device of the present invention, and FIGS. 7 and 8 are FIG. 9 is an explanatory view showing an embodiment of a connecting mechanism between the bottom portion and the core body of the present invention, FIG. 9 is an enlarged explanatory view of the core level adjusting device of the present invention, and FIG. 10 is a floating prevention lock of the present invention. FIG. 11 is an explanatory view showing the device, FIG. 11 and FIG. 12 are plan explanatory views and internal mechanism explanatory views when an automatic turning rod-shaped vibrating device is provided in the core body, and FIG. 13 is an explanatory view showing a conventional example. . A: Pot container (1): Core body (2): Bottom part (4), (4): Free end part (5): Advance device (6): Intervening piece (13): Centering device (18) ): Bottom pressing device (22): Bottom opening / closing device (32): Core level adjusting device (34): Lifting prevention lock device (37): Automatic swiveling rod vibration device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Taijiro Matsui, No. 1-1 Tobata-cho, Tobata-ku, Kitakyushu, Kitakyushu, Fukuoka (72) Inside the Yawata Works, Nippon Steel Co., Ltd. (72) Sumio Sakaki, Hitaba-ku, Kitakyushu, Kitakyushu, Fukuoka No. 1 in Machi No. 1 Nippon Steel Co., Ltd. Yawata Works (56) Reference JP 58-95185 (JP, A) JP 53-15814 (JP, Y2) JP 61-42673 JP , Y2)

Claims (3)

(57) [Claims] 1. A cylindrical core body made of a heat-resistant flexible material is longitudinally cut at least at one location on an outer peripheral wall of the core body, and both free ends thereof are abutted with each other and drawn between the free ends. In addition to interposing an advancing / retreating device for generating force, a plurality of centering devices for adjusting the spatial distance between the core body and the pot container are provided around the inside of the core body, while the core body is placed in the pot container. In order to erect, the core support part that is locked to the opening end of the pot container is projected horizontally to the opening edge of the core body, and the core support part is provided with a core level adjusting device. At the tip of the core support located in the trunnion of the pot container,
A molding core with a disengagement mechanism in a lining construction apparatus for a molten metal ladle, which is provided with a lifting prevention lock device that is freely moored to the trunnion. 2. A cylindrical core body made of a heat-resistant flexible material is longitudinally cut at least at one location on an outer peripheral wall thereof, and both free ends thereof are abutted with each other, and the free ends are drawn to each other. In addition to interposing an advancing / retreating device for generating force, a plurality of centering devices for adjusting the spatial distance between the core body and the pan container are provided around the inside of the core body, and further on the outer peripheral edge of the lower end of the core body. , A bottom portion that can be freely connected by an appropriate means is provided, and a bottom opening / closing device that freely closes the indefinite refractory inlet is further provided in the center of the bottom portion, and a plurality of bottom pressing devices that detach the bottom portion upward are provided. In order to bridge the core body into the pot container, a core support portion that locks at the opening end of the pot container is projected horizontally at the opening edge of the core body, and the core support portion is provided. A level adjuster is provided to the trunnion of the pot container. The core support tip for location, the trunnion to freely mooring core molding with the releasing mechanism in the melt pot lining construction apparatus characterized in that a uplift prevention locking apparatus. 3. The core body, wherein at least one swivel arm swivels on a space between a pot container and an outer peripheral wall of the core body, and a bar-shaped vibrator which can be moved up and down by the swivel arm. A molding core with a detachment mechanism in a lining construction device for a molten metal ladle according to any one of claims 1 and 2, wherein an automatic swiveling rod-shaped vibrating device constituted by the above is installed.