JP2005066618A - Molten metal conveying vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molten metal conveying vessel capable of releasing inner pressure caused by steam and preventing a leakage of the molten metal from a pressurized pipe. <P>SOLUTION: The molten metal conveying vessel comprises a vessel body having a charging vent of molten metal and an inlet vent of compressed air, a pouring pipe connected to the charging vent of molten metal, and the pressurized pipe connected to the inlet vent. The molten metal conveying vessel is arranged to discharge the molten metal from a pouring vent located at the tip of the pouring pipe by pressurizing the molten metal in the vessel body with compressed air. A sintering vent having numerous air holes capable of interconnect between inside the vessel body and the open air and not incapable of passing molten metal is detachably mounted on an end portion of the pressurized pipe. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a molten metal transporting container used for distributing hot water to a holding furnace at a casting site, distributing hot water to a customer of a molten aluminum melted by a melting manufacturer, and the like.

When performing aluminum casting, etc., it is inefficient to solidify the molten aluminum from the melting manufacturer into an ingot and then melt it again at the casting site, so the molten metal produced at the refining site is left in the casting site as it is. A molten metal transporting container is used. In some cases, the molten metal is outsourced without installing a melting furnace in the factory, and the molten metal is supplied from the outside to be cast. This is because the combined use of a central melting furnace and a small melting furnace increases the burden of equipment costs and labor costs, and it is advantageous to outsource the molten metal.

  As a molten metal transporting container, there is a container for preventing leakage of molten metal and cooling of molten metal by sealing a pouring port with a pouring stopper during transportation.

  The pouring work with the molten metal carrying ladle is carried by inserting the fork of the forklift into the fork insertion member provided at the bottom of the ladle, transporting the ladle to the pouring position, tilting the ladle after lifting it high The molten metal is dropped into a furnace or the like, and the hot water is circulated to several holding furnaces or the like with one ladle.

  However, in this pouring work, it is necessary to raise the molten metal transport container (heavy material) containing the molten metal and drop it precisely at the pouring destination, and it is necessary to pour the molten metal while adjusting the pouring speed. Therefore, high skill is required for the operation of tilting the ladle. In addition, since the pouring work must be circulated to several holding furnaces, etc., the ladle must be moved and moved up and down and tilted many times, increasing the work load. .

  Therefore, a container main body having a pouring inlet, a pouring pipe connected to the pouring inlet, and a compressed air introduction part for introducing compressed air into the container main body, A molten metal transport container has been proposed in which compressed air is introduced into the container body from a pressurization pipe provided on the lid and the molten metal is taken out from a pouring port at the tip of the pouring pipe.

In such a molten metal transport container, the pressurizing pipe is closed with a complete closing tool (plug) in order to prevent the molten metal from leaking out of the pressurizing pipe due to overturning or the like during transport.
However, if there is water in the container, the internal pressure is generated by the molten metal as a vapor, and when the internal pressure is excessive, the molten metal overflows from the pouring port, which is very dangerous.

In order to solve these problems, an object of the present invention is to provide a molten metal transporting container that can release the internal pressure due to water vapor and that does not leak molten metal from the pressurizing pipe.

  The molten metal transport container of the present invention includes a container body having a pouring inlet and a compressed air inlet, a pouring pipe connected to the pouring inlet, and a pressure pipe connected to the inlet. In the molten metal transport container configured to pressurize the molten metal in the container body with the compressed air and take out from the molten metal inlet at the tip of the molten metal pipe, the molten metal in the container body communicates with the outside air and the molten metal passes therethrough. It is characterized in that a sintered vent in which a large number of fine ventilation holes that cannot be attached is formed is detachably attached to the end portion of the pressure pipe.

  Also, an internal pressure release pipe for releasing the internal pressure of the container body is branched from the pressurization pipe, a valve for opening and closing the internal pressure release pipe is provided, and a cover that prevents the sintering vent from being removed from the pressurization pipe is formed. Linkable means for opening and closing the valve in conjunction with the raising / lowering operation of the cover is provided, and the cover is obstructed by tilting the cover, making it impossible to remove the sintered vent from the pressure tube In addition, the internal pressure release pipe is closed by the valve so that the sintered vent can be removed from the pressurization pipe by raising the cover, and the internal pressure release pipe is opened by the valve. Also good.

  According to the molten metal transporting container of the present invention, the sintered vent formed with a large number of fine ventilation holes through which the molten metal cannot pass is detachably attached to the terminal portion of the pressurizing pipe. Moreover, since the molten metal can be cooled and solidified without passing through the vent hole, leakage of the molten metal from the pressure tube can be prevented.

  As shown in FIG. 1, the molten metal transporting container A has a sealed structure, a container main body 1 that accommodates the molten metal, a pouring pipe 2 that has a pouring port 2a at the tip, and a pouring port 2a that is connected to the pouring port 2a. An extending pouring pipe 3 protruding outward, a pressurizing pipe 4 for introducing compressed air into the container body 1, a tightening means 5 for tightening the extending pouring pipe 3 to the pouring pipe 2, and an extending pouring pipe A pipe operating means 6 for connecting the hot water pipe 3 to the pouring pipe 2a and separating it from the pouring pipe 2 and for drawing the extended hot water pouring pipe 3 toward the container body 1 when the molten metal transporting container A is transported. The drawing means 7 and the pouring port opening / closing means 8 having a pouring stopper C35 that closes the pouring port 2a when the molten metal carrying container A is conveyed are provided.

  As shown in FIG. 2, the container body 1 is formed by lining a heat insulating material 1 d and a fire-resistant layer 1 b of a castable refractory material on a steel case 1 a, and a molten metal inlet 1 c is formed on the bottom side of the container body 1. The pouring pipe 2 is connected to the molten metal inlet 1c, and the pouring pipe 2 protrudes obliquely upward at an angle of about 70 degrees with respect to the horizontal line.

  The upper surface of the container body 1 is provided with an opening 1e for containing molten metal produced at a refining site. A lid 1f is attached to the opening 1e, and an inlet 1g for compressed air is provided in the lid 1f. A pressurization pipe 4 is attached to the inlet 1g, and a compressed air supply pipe (not shown) is connected to the pressurization pipe 4 so that the compressed air is introduced into the molten metal transporting container A.

  A sintered vent D is detachably connected to the end of the pressure tube 4 by a coupler connection type. The sintered vent D is a porous metal body obtained by molding and sintering metal powder, and is formed through a large number of fine vent holes D1 as shown in FIG. The hole diameter of D1 is 0.5 mm or less. Then, although the above-mentioned water vapor can pass through the vent hole D1 of the sintered vent D, the molten metal clogs in the vent hole D1, cools and solidifies to block the vent hole D1. As described above, the sintered bend D has both functions of preventing the molten metal from leaking and releasing the internal pressure.

  As shown in FIGS. 3A and 3B, an internal pressure release pipe 41 for releasing the internal pressure of the container body 1 is connected to the pressurization pipe 4. The internal pressure release pipe 41 branches off from the pressurization pipe 4 between the inlet 1g of the lid 1f and the sintered vent D, and a valve (three-way valve ball valve) 42 for opening the internal pressure release pipe 41 is provided. Yes. When the valve 42 is opened, the molten metal transporting container A and the outside air communicate with each other through the internal pressure release pipe 41, and water vapor in the molten metal transporting container A is released to release the internal pressure of the container.

  A cover 43 that prevents the sintered vent D from being removed from the pressurizing pipe 4 is attached to the pressurizing pipe 4 so that it can be tilted up and down, and a linking means 44 for switching the valve 42 in conjunction with the tilting operation of the cover 43 is provided. It has been.

  Then, when the cover 43 is tilted, the cover 43 becomes in the way and it becomes impossible to remove the sintered vent D from the pressure tube 4, and the internal pressure release tube 41 is closed by the valve 42. By raising the cover 43, the sintered vent D can be removed from the pressurizing pipe 4, and the internal pressure releasing pipe 41 is opened by the valve.

  Then, the above-described water vapor is released from the pressurizing pipe 4 to the outside through the vent hole D1 of the sintered vent D by tilting the cover 43 during the transport of the molten metal transport container A. Further, even if the molten metal carrying container A falls over during conveyance and the molten metal in the molten metal carrying container A reaches the pressure tube 4, the molten metal leakage can be prevented by the sintering vent D.

  In addition, when the vent hole D1 of the sintered vent D is closed with the molten metal during conveyance or the like, the escape space for the water vapor disappears and the internal pressure of the molten metal conveying container A increases. However, since the condensing vent D must be removed from the pressurizing pipe 4 and connected to the compressed air supply pipe after raising the cover 43 when pouring hot water, the internal pressure is released by raising the cover 43 before removing the condensing vent D. The internal pressure of the container can be released through the pipe 41. Therefore, when the condensation vent D is removed from the pressurization pipe 4, it is possible to prevent the worker connecting the compressed air supply pipe from being exposed to the water vapor ejected from the pressurization pipe 4.

  The pouring pipe 2 includes a metal outer pipe 2b, a fireproof tube 2c formed of a fireproof material, and a fireproof material layer 1b formed between the outer pipe 2b and the fireproof tube 2c. A heat insulating material layer 1d is formed between the outer tube 2b and the refractory material layer 1b.

  A casting pipe nozzle 9 made of cast iron is provided at the pouring port 2 a of the pouring pipe 2, a flange 10 is fixed to the pouring pipe nozzle 9, and an interval of 180 degrees is provided at two locations on the outer peripheral edge of the flange 10. Thus, a groove 10a is formed. The inner peripheral surface of the pouring pipe nozzle 9 is formed in a mortar shape so as to coincide with the pouring stopper C35 of the pouring port opening / closing means 8, whereby the pouring stopper C35 is fitted into the pouring pipe nozzle 9 and poured into the pouring port. The sealing property of 2a is improved and leakage of the molten metal during transportation is prevented. Moreover, the pipe axis of the pouring pipe 2 is formed in a straight line, so that the entire inside of the pouring pipe 2 can be visually confirmed from the pouring port 2a, the adhesion state of the aluminum metal in the pouring pipe 2 and the refractory layer You can easily check the damage status.

  The drawn pouring pipe 3 is formed by lining a metal pipe 3b with a refractory layer 3c made of a refractory material such as calcium silicate. The refractory layer 3c improves heat insulation and wear resistance against molten metal fluid. Yes. A flange 11 is attached to the base end side of the extending pouring pipe 3, and grooves 11a are formed at two positions on the outer peripheral edge of the flange 11 at intervals of 180 degrees. Further, in order to prevent the end of the drawn pouring pipe 3 from coming into contact with the molten metal and causing melt damage, it is preferable to cover the end with a refractory material such as silicon nitride.

  The extending pouring pipe 3 is bent at two locations, and the extending pouring port 3a at the tip of the extending pouring pipe 3 can face the molten metal in the holding furnace 100 as a pouring destination without tilting the molten metal transporting container A. (FIG. 12). Therefore, the molten metal taken out from the pouring port 2a of the molten metal carrying container A by the pressurized pouring flows to the outside of the container body 1 through the drawn pouring pipe 3, and then flows downward and is poured into the holding furnace 100. As shown in FIG. 12A, the pouring work can be performed in a state where the extending pouring port 3 a is positioned below the molten metal surface 101 of the holding furnace 100. As a result, it falls from the pouring port 2a of the pouring pipe 2 onto the molten metal surface 101 in the holding furnace 100 as in the conventional tilted molten metal transporting container A1 having no extending pouring pipe shown in FIG. Compared with the case, the air contact time of the molten metal taken out from the molten metal carrying container A can be shortened, the air oxidation of the molten metal is suppressed, the molten metal surface becomes quiet, and the generation of oxide can be reduced. Moreover, by immersing the drawn pouring port 3a in the molten metal of the holding furnace 100, air oxidation of the molten metal can be further reduced. In addition, even if the extending | stretching pouring pipe 3 is formed so that the extending | stretching pouring port 3a may be located on the molten metal surface 101, the air oxidation of a molten metal can be reduced.

  The drawing means 7 is provided with a rotating shaft 7a. The rotating shaft 7a is suspended from the flange 11 of the drawn pouring pipe 3, and the through hole 10b is provided in the flange 10 of the pouring pipe 2, and communicates with the through hole 10b. A shaft guide cylinder 12 is suspended from the flange 10. Then, by inserting the rotating shaft 7a into the through hole 10b and the shaft guide cylinder 12, the drawn pouring pipe 3 can swing horizontally around the rotating shaft 7a as shown by the arrow in FIG. It is possible to draw the extended pouring pipe 3 projecting outward in the outer side of the container body 1 toward the container main body 1, and it is possible to project the drawn hot pouring pipe 3 drawn toward the outer side of the container main body 1.

  FIG. 13 shows a means B for positioning the extended pouring pipe 3 at a position pulled toward the container body 1, and the means B includes an attachment piece B 2 having a pin hole B 1 fixed to the extending pouring pipe 3. And a mounting piece B4 having a pin hole B3 fixed to the container body 1, a fixing pin B6 having a retaining hole B5, and a retaining body B7 for the fixing pin B6, and the extended pouring pipe 3 is connected to the container body. Pulled to the 1 side to match the pin holes B1 and B3 of the mounting pieces B2 and B4, and after inserting the fixing pin B6 into the pin holes B1 and B3, insert the retaining body B6 into the retaining hole B5 of the fixing pin B6 Then, the extending pouring pipe 3 is positioned.

  As shown in FIGS. 4 to 6, the pipe operating means 6 of the extending pouring pipe 3 includes a push-type toggle clamp C 1, and the push-type toggle clamp C 1 is connected to a rod C 11 and a shaft that move the rotating shaft 7 a of the extending pouring pipe 3 up and down. And a support frame C12 formed on the guide tube 12. The rod C11 is slidably supported by the shaft guide cylinder and is driven by the toggle mechanism C13. This toggle mechanism C13 includes a pair of links C13 and C14 pivotally connected to each other by a pin P. One first link C13 is pivotally attached to the support frame C12 and the other second link C14 is pivotally attached to the rod C11. Then, the rod C11 is moved up and down by applying a swinging force to the links C13 and C14 by a handle C15 that can be manually swinged. Note that the handle C15 is formed integrally with the first link C13.

  Then, by rotating the handle C15 upward as shown in FIG. 5, the first link C13 swings upward, all the pins P are aligned on the same straight line, and the rod C11 is in the highest position. The handle C15 is pivoted upward from the raised position and pushed in slightly. When the pin P located in the middle stage is slightly pivoted around the pin P located in the lowest stage, the links C13 and C14 hit the support frame 7. The rotation of both links C13 and C14 is restricted. Thereby, the rotating shaft 7a of the extending | stretching pouring pipe 3 is pushed up by the rod C11, and the extending | stretching pouring pipe 3 leaves | separates from the pouring port 2a, and raises to the lift height A. As a result, the aluminum ingot that adheres to the inside of the extending pouring pipe 3 and prevents the swinging of the extending pouring pipe 3 can be peeled off from the extending pouring pipe 3.

  On the other hand, by rotating the handle C15 downward as shown in FIG. 4, the first link C13 is swung downward to lower the rod C11, and the extended pouring pipe 3 is connected to the pouring port 2a of the pouring pipe 2. At the same time, the flange 11 of the drawn pouring pipe 3 is overlapped with the flange 10 of the pouring pipe 2.

  As shown in FIG. 7, the tightening means 5 of the extending pouring pipe 3 includes a pulling type toggle clamp C <b> 2, and the pulling type toggle clamp C <b> 2 is attached to a bracket 6 a formed outside the pouring pipe 2. The pull-type toggle clamp C2 includes a handle C21. A base end portion of the handle C21 is pivotally attached to the bracket 6a by a pin P, and a base end portion of the connection link C22 is pivotally attached to an intermediate portion of the handle C21 by a pin P. A hook portion C23 is provided at the front end of the connection link C22.

  FIG. 7 shows a state in which the extending pouring pipe 3 is fastened to the pouring pipe 2 by the pulling type toggle clamp C2, and the extending pouring pipe 3 is connected to the pouring port 2a as described above, and the flanges 10, 11 are connected to each other. In the overlapped state, the flange 11 is hooked and locked by the hook portion C23. As a result, the tightening of the drawn pouring pipe 3 to the pouring pipe 2 is completed. On the other hand, when releasing the lock, the handle C21 is rotated upward as indicated by a two-dot chain line to push the hooking portion C23 upward. When locking again, after the connecting link C22 is positioned in the groove 11a of the flange 11, the handle C21 is rotated downward to lower the hook portion C23.

  As shown in FIGS. 8 to 11, the pouring gate opening / closing means 8 includes a toggle clamp C <b> 3, and the toggle clamp C <b> 3 is attached to a bracket 8 a fixed to the pouring pipe 2. The toggle clamp C3 includes a stopper arm C31, a handle C32, a support plate C33, and a link C34 connecting the handle C32 and the support plate C33. The support plate C33 can be rotated in the horizontal direction by a rotating shaft 8b on the bracket 8a. It is connected to. A pouring stopper C35 for opening and closing the pouring gate 2a is attached to the tip of the stopper arm C31, and the pouring stopper C35 is biased by a spring C36. A base end portion of the stopper arm C31 is pivotally attached to one end of the support plate C33 by a pin P, and a base end portion of a link C34 is pivotally attached to the other end of the support plate C33 by a pin P. The rear end of the stopper arm C31 And the tip of the handle C32 are connected by a pin P. The upper end of the link C34 pivotally supported by the support plate 2 is pivotally attached by a pin P near the tip of the handle C32.

  Then, when the handle C32 is rotated upward as shown in FIG. 10, the link 7 and the stopper arm C31 are swung to raise the stopper arm C31. Conversely, by turning the handle downward as shown in FIG. 11, the stopper arm C31 can be turned down and the pouring port 2a can be closed by the pouring stopper C35. At this time, the adhesiveness of the fitting between the pouring stopper C35 and the pouring pipe nozzle 9 of the pouring port 2a can be enhanced by the elastic force of the spring C36, and the degree of adhesion can also be increased by the vibration received by the molten metal carrying container A during the transportation. There is no need to decrease.

  When the stopper arm C31 is raised, the toggle clamp C3 can be rotated in the horizontal direction around the rotation shaft 8b, and the pouring stopper C35 can be separated from the pouring port 2a.

  A tightening locking member 14 is provided on the side wall of the container body 1 for tightening to the loading platform when transported by a truck, and a fork insertion member 15 is attached to the bottom surface of the container body 1 so that the molten metal transport container A Is transported by inserting a fork of a forklift (not shown) into the fork insertion member 10. Reference numeral 17 in the figure is a lid, and 18 is a small lid.

  In the molten metal transport container A configured as described above, hot water is distributed as follows. When the molten metal transport container A containing the molten metal is transported, the drawn pouring pipe 3 is pulled to the container main body 1 by the pulling means 7 as described above so that it does not interfere with the transport work along the container main body 1. In addition, the pouring port 2a is closed with the pouring stopper C35.

  Next, the following work is performed as preparation work for pouring. First, after the handle is raised by the pouring port opening / closing means 8 and the pouring stopper C35 is separated from the pouring port 2a, the toggle clamp C3 for retracting the pouring stopper C35 from above the pouring port 2a is rotated around the rotation shaft 8b. . Next, the drawn pouring pipe 3 is rotated by the pulling means 7 so that the extending pouring pipe 3 protrudes outward from the container body 1, and then the drawn pouring pipe 3 is lowered by the pipe operating means 6. Connected to the pouring port 2 a of the pouring pipe 2, the extending pouring pipe 3 is fastened to the pouring port 2 a by the tightening means 5.

  The pouring of water into the holding furnace 100 is performed as follows. A compressed air supply pipe connected to a compressed air supply means (compressor) is connected to the pressurizing pipe 4 of the molten metal transporting container A, the inside of the container body 1 is pressurized with compressed air, and the molten metal is injected into the molten metal feeding pipe 2 with the compressed air pressure It is sent out from the pouring spout 2a through the extended pouring pipe 3 and poured into a holding furnace or the like. In this way, the molten metal transporting container A can be a pressurized pouring type, and the molten metal transporting container A can be tilted as shown in FIG. Pouring hot water is possible without it.

  After the pouring operation is completed, the tightening of the extending pouring pipe 3 is released, and after the extending pouring pipe 3 is raised to the lift height A by the pipe operating means 6, the extending pouring pipe 3 is placed in the container by the drawing means 7. It draws toward the main body 1 and closes the pouring port 2a with the pouring stopper C35. And in this state, the molten metal conveyance container A is moved to another hot water distribution place.

  In the present embodiment, the tightening means 5, the pipe operating means 6 and the pouring port opening / closing means 8 of the extended pouring pipe 3 are concentrated near the pouring port 2a and the toggle clamp is adopted, so that the work efficiency of the hot water supply work is improved. . In addition, since these means can be made small, even if they exist as protrusions on the outside of the container body 1, no trouble occurs, and when moving in a foundry or transporting with a transport vehicle. Also, hot water and pouring work can be performed smoothly.

It is a perspective view which shows embodiment of the molten metal conveyance container of this invention. It is a front sectional view of the same embodiment. (A) is a top view of the embodiment, (b) is a side view of the embodiment, and (c) is a perspective view of a sintered vent. It is sectional drawing which shows the operation content of the extending | stretching pouring pipe by the push type toggle clamp of the embodiment. It is sectional drawing which shows the operation content of the extending | stretching pouring pipe by the push type toggle clamp of the embodiment. It is sectional drawing which shows the operation content of the extending | stretching pouring pipe by the drawing means of the embodiment. It is sectional drawing which shows operation | movement of the fastening means of the embodiment. It is sectional drawing which shows operation | movement of the pouring gate opening / closing means of the embodiment. It is sectional drawing which shows operation | movement of the pouring gate opening / closing means of the embodiment. It is sectional drawing which shows operation | movement of the pouring gate opening / closing means of the embodiment. It is sectional drawing which shows operation | movement of the pouring gate opening / closing means of the embodiment. (A) is a side view which shows the pouring work by the embodiment, (b) is a side view which shows the pouring work by the conventional molten metal conveyance container. (A) is a perspective view which shows the positioning means of the extending | stretching pouring pipe of the embodiment, (b) is sectional drawing which shows the positioning means.

Explanation of symbols

A Molten metal container 1 Container body 2 Pouring pipe 2a Pouring port D Sintering vent 4 Pressurizing pipe 41 Internal pressure releasing pipe 42 Valve

Claims (2)

A container body having a pouring inlet and a compressed air inlet; a pouring pipe connected to the pouring inlet; and a pressure pipe connected to the inlet; In the molten metal transport container configured to be pressurized with the compressed air and taken out from the pouring port at the tip of the pouring pipe,
A molten metal transporting container, wherein a sintered vent in which a large number of fine ventilation holes that allow the inside of the container main body and the outside air to communicate with each other and cannot pass through the molten metal are formed is detachably attached to the pressurizing pipe. An internal pressure release pipe for releasing the internal pressure of the container body is branched from the pressurization pipe, a valve for opening and closing the internal pressure release pipe is provided, and a cover that prevents the sintering vent from being removed from the pressurization pipe can be tilted up and down. Provided with a link means for opening and closing the valve in conjunction with the raising and lowering operation of the cover,
By tilting the cover, the cover disturbs the removal of the sintered vent from the pressurizing pipe, and the internal pressure release pipe is closed by the valve, and the cover is lifted from the pressurizing pipe. 2. The molten metal carrying container according to claim 1, wherein the sintered vent can be removed and the internal pressure release pipe is opened by the valve.

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