JPH11320078A - Ladle with cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize heat dispersion quantity from the upper surface of molten metal in a ladle by providing a cover member automatically opened/closed, according to the operations, such as receiving of the molten metal, transporting, waiting, treating of the molten metal, discharging of the molten metal. SOLUTION: At the time of receiving the molten metal, the ladle body B is put on a floor surface, and since the weight of a heavy member 11 is supported by the floor surface, an automatic opening/closing mechanism 8 holds the cover member C to the opening state and the molten metal can be supplied into the ladle body B. After receiving the molten metal, at the time of hanging a hangar A for transporting to the following work with a crane, etc., the opening/closing lever 9 is swung to the closing position with the weight of the heavy member 11 separated from the floor surface, and the cover body C is shifted from the opening position to the closing position by working the automatic opening/closing mechanism 8 and then, the ladle body is made to the closing state. Since the ladle body B is transported and waited in the covered state, the heat dispersion from the upper surface of the molten metal can be prevented. Since the cover member C is automatically opened at the time of putting the ladle body to the floor surface after transporting, the removal of slag, etc., is executed. In order to discharge the molten metal, the ladle body B is hung up and the cover member C is made to the closing state and the molten metal discharging hole is formed with a stopper mechanism 15 by tilting the ladle body with a handle and the molten metal can be discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladle with a lid used for holding, transporting, tapping, and the like of molten metal such as metal, glass, and slag.

[0002]

2. Description of the Related Art Molten metal, glass, slag and the like melted in a melting furnace are transferred to a ladle via a gutter and a forehearth. The ladle is moved to a predetermined location by a crane or forklift or other transporting means, and after adjusting the components such as slag removal and desulfurization as necessary or waiting for the required time, moves to the casting site, and then to the mold Either tap water directly or transferred to a dedicated ladle installed in the casting line. During this time, the molten metal is usually kept in the ladle for about 5 to 15 minutes.

[0003]

The ladle has a refractory material lined in a steel plate cylindrical casing, and generally has no lid.

On the other hand, assuming that the molten metal is cast iron, the molten metal received by the ladle takes about 10 minutes to discharge.
A temperature drop of as much as 0 ° C. occurs. The pouring temperature to the mold is 1,
In the case of 370 ° C. to 1,400 ° C., the temperature of the hot water to the ladle must be at least 1,500 ° C. or higher. This has many problems, including forcing severe high-temperature operations in the melting furnace and forehearth.

Therefore, from the viewpoint of energy saving, attempts have been made to enhance the heat insulation of the lining of the ladle to cope with the drop in the temperature of the molten metal. However, the biggest factor that lowers the temperature of the molten metal is the amount of heat dissipated from the upper surface of the molten metal.
This is about 50-60% of the total heat loss of the molten metal
Therefore, it is not enough to enhance the heat insulation alone, and it is absolutely necessary to equip a lid with heat insulation. However, because the lid with heat insulation is structurally quite heavy, opening and closing the lid takes a lot of time and manpower, the ladle is actually used without the insulation lid. It is in the current situation.

An object of the present invention is to provide a ladle with a lid provided with a mechanism capable of automatically opening and closing a required amount of a lid in each operation step.

[0007]

SUMMARY OF THE INVENTION The present invention provides a method for receiving molten metal,
The present invention relates to a ladle with a lid, which is provided with a lid member that can be automatically opened and closed according to operations such as conveyance, standby, molten metal processing, and tapping.

According to a preferred embodiment of the present invention, a ladle with a lid is provided with a hanging frame, a ladle main body which can be conveyed while being lifted through the hanging frame so as to be capable of tilting and rotating, and a ladle. A lid member for opening and closing the upper end opening of the main body, and an automatic opening and closing mechanism for the lid member, the automatic opening and closing mechanism includes an opening and closing lever for the lid member,
A pivot for pivotally connecting the lever to the ladle main body and a weight for turning the lever are provided. When the ladle main body lands on the floor, its weight does not apply to the lever side. On the other hand, when the ladle body is lifted, it is linked to the lever so that its weight is applied to the lever side. When the lever does not receive the weight of the weight, the lever holds the lid member in an open state, and the weight of the weight is When it is received, it turns and moves the lid member from the open position to the closed position.

According to still another preferred embodiment, a stopper mechanism is provided between the suspension frame and the lid member, and the stopper mechanism is used when the ladle body is tilted and rotated in the suspended state. It does not function during the initial tilting movement from the normal position and allows the ladle body and the lid member to tilt and rotate integrally. , The tilting operation of the lid member is stopped at least temporarily, causing a difference in the tilting amount with the ladle body, and the lid member is automatically opened by the tilting amount difference. It is configured to form a tap hole with the ladle body.

According to still another preferred embodiment, the front edge of the stop plate is constituted by an upper straight front edge and an arc-shaped front edge lower than the straight front edge, and the stopper is formed along the straight front edge. While moving the ladle body, the tilting and rotating operation of the lid member is stopped and the tilting and rotating operation of the ladle body is continued, and while moving along the arc-shaped front edge, the ladle body and the The lid member and the lid member are tilted and rotated substantially integrally.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. As is apparent from the side view shown in FIG. 1, the ladle with the lid according to the present invention includes a hanging frame A, a ladle body B that can be transported in a state of being lifted through the hanging frame A, and an upper end of the ladle body B. Lid member C for opening and closing the opening
And

As shown in FIG. 3, the hanging frame A is a front gate type and has a ladle body B at the lower ends of the hanging rods 1, 1 on both sides.
Are supported so as to be able to be lifted, and the upper ends of the hanging rods 1, 1 are integrally connected by a connecting rod 2 extending laterally.

The ladle main body B is lifted by locking a hook of a crane or the like to a suspension ring 3 formed on the connecting rod 2 or inserting and locking a lifter of a forklift under the connecting rod 2. Can be moved and transported.

The ladle body B pivots on bearings 5, 5 at the lower end of the suspension rods 1, 1 at the shafts 4, 4 integrally formed slightly above the center of the left and right sides. When the handle 7 is freely supported and provided on the shaft portion 4 via the speed reduction device 6, the hot water receiving state (normally placed state) shown in FIG. 1 is obtained.
5 to 6 in a tapping state (tilting state). The configuration of the above ladle is already well known.

The present invention is characterized in that the ladle having the above structure is provided with a lid member C which can be automatically opened and closed. The lid member C is openable and closable in the front-rear direction. By applying the automatic opening / closing mechanism 8, the ladle body B is automatically opened when the ladle main body B is landed on the floor surface, and automatically when the ladle body B is lifted. It becomes a closed state.

As shown in FIGS. 1 and 4, the automatic opening / closing mechanism 8 includes an opening / closing lever 9 for the cover member C and a pivot 10 for pivotally connecting the lever 9 to the lower end of the rear wall of the ladle body B. When,
And a weight 11 for turning a lever. When the ladle body B lands on the floor, the weight 11 is supported by the floor surface and does not cover the laver 9 side. However, when the ladle body B is lifted, the weight 11 separates from the floor surface. It is linked to the lever 9 so that the weight is applied to the lever 9. Thus,
When the ladle body B lands on the floor, the lever 9
When the weight 1 is not received, the lid member C is kept open as shown in FIG. 1, but when the ladle main body B is lifted and the weight 11 is received as a result, the lid member C turns about the pivot 10 as a fulcrum. Then, the lid member C is turned from the open position shown in FIG. 1 to the closed position shown in FIG.

In the illustrated embodiment, the opening / closing lever 9 includes a lid lever 9a which is placed at the upper end and integrally supports the lid member C;
A weight lever 9b integrally connected to the lower end of the lid lever 9a via a pivot 10;
When the cover member C is at the open position shown in FIG. 1, the cover member C abuts on the lower side of the bearing portion 5 at the lower end of the hanging rod 1, The rotation of the lid member B described above is prevented.

The weight 11 has a horizontally long shape, and is supported at the base end side by a pivot 12 at the lower end of both sides of the ladle body B from the front end side so as to be pivotable in the vertical direction. And
The distal end is connected to the weight lever 9b via a connecting means including a pin 13 and a pin hole 14. In order to enable the pivoting operation of the weight 11 and the weight lever 9b about the pivots 10 and 12 as fulcrums, the pin 13 is freely moved in the pin hole 14 in the direction of eliminating the mutual interference between the weight 11 and the weight lever 9b. It can be moved.

When the ladle body B is landing on the floor, the weight 11 is grounded on the floor surface as shown in FIG. 1 and the entire weight is supported by the floor surface. When B is lifted, it separates from the floor and tends to pivot downward on the pivot 12 as a fulcrum, so that the entire weight is applied to the weight lever 9b. When the weight lever 9b receives the weight of the weight 11,
As shown in FIG. 4, the pivot 10 pivots from the open position to the closed position with the pivot 10 as a fulcrum, and accordingly, the lid lever 9 a and the lid member C also pivot from the open position to the closed position. When the abutment comes into contact with the upper end of the ladle body B, the turning operation is automatically stopped, and thereafter, the lid member C is restrained in the closed state by the action of the weight 11.

With reference to the open state shown in FIG.
Is the weight lever 9b and the lid lever 9 with the pivot 12 as a fulcrum.
a and the cover member C need to be able to pivot over the angular range necessary to pivotally move from the open position to the closed position.
The moving distance and the like of the pin 13 within 4 are appropriately selected and determined based on the amount of turning to be obtained.

A stopper mechanism 15 is provided between the hanging rod 1 and the lid member C to automatically open and close the lid member C when the ladle body B is tilted and rotated in the lifting state.

The stopper mechanism 15 includes a stopper 16 provided on each of the suspension rods 1, 1 and a stop plate 17 provided on both left and right sides of the lid member C along the lid lever 9b. As shown in FIG. 2, when the ladle main body B is in the normal position, a gap 18 is formed between the front edge 17 a of the stop plate 17 and the stopper 16.

When the ladle body B is in the suspended state, the lid member C is kept closed by the operation of the automatic opening / closing mechanism 8, so that when the ladle body B is tilted and rotated by operating the handle 7, The lid member C basically performs a tilting and rotating operation integrally with the ladle main body B. Thus, the initial stage of the tilting operation in which the front edge 17a of the stop plate 17 passes through the interval 18, for example, 10 to 10
At the time of the tilting operation of about 20 °, the ladle main body B and the lid member C take an integral tilting rotation operation. However, when the ladle main body exceeds the initial tilting rotation position, the front edge 17 a of the stop plate 17 abuts on the stopper 16. Then, after the stop, the tilting / rotating operation of the ladle main body B proceeds while the lid member C is left, and a difference occurs in the tilting / rotating amount with the going lid member C. The lid member C is substantially opened as shown in FIG. 4, and the tap hole 19 is automatically formed between the ladle body B and the lid member C.

If the opening degree of the tap hole 19 is too large, the heat dissipation from the molten metal will increase. Therefore, as shown in FIG. Is preferably formed so that the lid member C and the ladle body B can be tilted and rotated again.

In the illustrated embodiment, for this purpose, the top of the front edge 17a of the stop plate 17 is formed by a straight front edge 17a.
₁ ungated, downward from the straight line front edge 17a _1, based on the傾回dynamic direction, arcuate leading edge 17a ₂ ungated to recessed rearward,
Although while the stopper 16 moves along a linear front edge 17a ₁ of the upper傾回dynamic behavior of the cover member C stops. While moving along the circular arc-shaped front edge 17a ₂ moves in an arc front edge 17a ₂ is the most like is prevented from occurring difference in傾回rotation amount formed between the lid member C and the ladle body B ing. In order to carry out the movement along the arc-shaped front edge 17a ₂ of the stopper 16 smoothly, the stopper 16 as shown in FIG. 2, it can be constructed from the roller 16a. In order to adjust the degree of opening of the tap hole 19, the fixing position of the stopper 16 to the hanging rod 1 can be freely selected.

FIG. 1 shows a situation at the time of receiving hot water. At the time of receiving hot water, the ladle body B lands on the floor surface, and thus the weight of the weight 11 is supported on the floor surface. Therefore, the automatic opening / closing mechanism 8 holds the lid member C in the open state, and the ladle body B The supply of the molten metal into the inside becomes possible.

After the hot water has been received, the ladle body B is lifted up by applying a mobile transfer device such as a crane or a forklift via the suspension frame A in order to transfer it to the next work position. When the ladle body B is lifted, the weight 11
Is separated from the floor surface, and the lid opening / closing lever 9 is turned from the open position shown in FIG. 1 to the closed position shown in FIG. 2 by the weight of the weight 11. Therefore, the lid member C is automatically pivoted from the open position to the closed position by the operation of the automatic opening / closing mechanism 8 having such a mechanism, and is restrained in the closed state.

Thus, the ladle body B can be transported to the next work position with the lid covered, or made to stand by for tapping, and the like. Heat dissipation can be prevented.

When the sheet is transported to the next work position and lands, the lid member C is automatically opened again, so that the work for removing the residue can be performed without any trouble.

After the slag removing operation, when the ladle body B is lifted for tapping, the lid member C is closed again. When the ladle main body B is tilted and rotated by operating the handle 7 under this lifting state, the amount of rotation between the lid member C and the ladle main body B is controlled by the stopper mechanism 15 as described above. , A tap hole 19 is formed, and a tapping operation is enabled. As described above, according to the ladle with the lid of the present invention, the lid member can be automatically opened and closed according to each work process.

In the present invention, a means for preventing splash accumulation on the joining surface between the ladle body B and the lid member so as to prevent the sealing property of the lid member from being deteriorated due to the splash at the time of receiving hot water or at the time of melting the molten metal. Can be applied. FIG. 7 shows an example of the splash accumulation preventing means, in which the joining of the ladle body B and the cover member C is performed at a portion closer to the outer peripheral side, and the joining surface 20 of both is inclined downward, and along the inclination. An arrangement for sliding down a splash is shown.

In order to prevent the shell steel plate 21 and the like of the cover member B from being unduly heated by the radiant heat of the molten metal, FIG.
As shown in (2), a step 22 can be provided on the joint surface 20 to provide a wall for radiation.

[0033]

According to the present invention, the lid member provided on the ladle main body can be automatically opened and closed according to operations such as hot water reception, transport, standby, molten metal processing, and tapping. The amount of heat dissipation can be reduced as much as possible.

[Brief description of the drawings]

FIG. 1 is a side view of a landing state according to an embodiment of the present invention.

FIG. 2 is a side view of the lifted state.

FIG. 3 is a longitudinal sectional view of the suspended state.

FIG. 4 is an explanatory diagram of an initial stage of a tilting and rotating operation of a ladle main body.

FIG. 5 is an explanatory diagram showing a situation at the end of the tilting / rotating operation.

FIG. 6 is an explanatory diagram of a stopper mechanism.

FIG. 7 is an enlarged sectional view of a joining portion between a ladle main body and a lid member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Suspension frame B Ladle main body C Cover member 1 Hanging rod 2 Connecting rod 3 Hanging ring 4 Shaft 5 Bearing 6 Reduction gear 7 Handle 8 Automatic opening / closing mechanism 9 Opening / closing lever 10 Axis 11 Weight 12 Axis 13 Pin 14 Pin hole 15 Stopper mechanism 16 Stopper 16a Roller 17 Stop plate 17a Front edge 18 Interval 19 Tap hole 20 Joining surface 21 Shell steel plate 22 Step

Claims (4)

[Claims] 1. A ladle with a lid, comprising a lid member which can be automatically opened and closed in accordance with operations such as receiving, transporting, waiting, melting, and tapping of molten metal. 2. A hanging frame, a ladle main body which can be transported in a state of being lifted through the hanging frame so as to be tilted and rotatable, a lid member for opening and closing an upper end opening of the ladle main body, and a An automatic opening / closing mechanism, the automatic opening / closing mechanism includes an opening / closing lever of a lid member, a pivot for pivotally connecting the lever to the ladle main body,
The weight is not applied to the lever side when the ladle body is on the floor, while the weight is adjusted to the lever when the ladle body is lifted. When the lever is not receiving the weight of the weight, the lever holds the lid member in an open state, and when receiving the weight of the weight, the lever pivots to move the lid member from the open position to the closed position. The ladle with a lid according to claim 1, wherein the ladle is configured to be moved. 3. A stopper mechanism is provided between the suspension frame and the lid member, and the stopper mechanism performs an initial tilting operation from the normal position when the tilting operation of the ladle body in the lifting state. During this period, the ladle main body and the lid member are allowed to tilt and rotate integrally, while when the ladle body exceeds the initial tilt rotation position, it functions and the lid member tilts while the tilting and rotating operation of the ladle body continues. The moving operation is stopped at least temporarily, and a difference is generated in the amount of tilt and rotation between the ladle body and the difference between the amount of tilt and rotation. The ladle according to claim 2, wherein the ladle is formed. 4. A stop member, wherein the front edge of the stop plate comprises an upper linear front edge and an arc-shaped front edge below the linear front edge, and the stopper member moves while the stopper moves along the linear front edge. While the tilting / rotating operation of the ladle is stopped, the tilting / rotating operation of the ladle main body is continued, and while moving along the arc-shaped front edge, the ladle main body and the lid member are tilted substantially integrally. The ladle with a lid according to claim 3, wherein the ladle is rotated.