JP4392552B2 - Molten metal container - Google Patents

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 body having a pouring inlet, a pouring pipe connected to the pouring inlet, and a compressed air introduction portion for introducing compressed air into the container body, the container body A molten metal transport container configured to pressurize the molten metal with the compressed air and take it out from the pouring port at the tip of the pouring pipe has been proposed.

  Although the refractory material layer is provided in the pouring pipe and the container main body of the molten metal carrying container, since the refractory material layer is formed of a single layer, if a crack occurs in the refractory material layer, from the crack portion There was a problem that air pressure leaked out and the air pressure pushing out the molten metal was insufficient.

In order to solve these problems, it is an object of the present invention to provide a molten metal transport container that can prevent leakage of pressurized air even when a crack occurs in a refractory material layer.

The molten metal transport container of the present invention includes a container main body having a pouring inlet, a pouring pipe connected to the pouring inlet, and a compressed air introduction section for introducing compressed air into the container main body. A molten metal transport container configured to pressurize the molten metal in the container body with the compressed air and take it out from a pouring port at a tip of the pouring pipe, wherein the pouring pipe includes an outer pipe and a ceramic raw material. A refractory tube obtained by forming a refractory material into a cylindrical shape and firing the refractory material, and a refractory material layer formed by pouring a castable refractory material between the outer tube and the refractory tube. Is arranged so as to extend from the base end of the pouring inlet of the container body to the tip of the pouring inlet of the pouring pipe.

According to the molten metal carrying container of the present invention, the pouring pipe includes an outer pipe, a refractory tube formed by firing a refractory material made of a ceramic raw material into a cylindrical shape, the outer pipe, and the refractory tube. A refractory material layer formed by pouring a castable refractory material between the refractory tube and the refractory tube from the base end of the pouring inlet of the container body to the tip of the pouring spout of the pouring pipe. Therefore, even if a crack occurs in the refractory material layer, the crack can be kept in front of the refractory tube, and leakage of pressurized air due to the crack can be prevented.

  The molten metal transporting container A includes a container main body 1 that stores the molten metal, a pouring pipe 2 that has a pouring port 2 a at the tip, and an extending pouring pipe 3 that is connected to the pouring port 2 a and protrudes outward of the container main body 1. A compressed air introduction part 4 for introducing compressed air into the container body 1, a fastening means 5 for fastening the extended pouring pipe 3 to the pouring pipe 2, and the extending pouring pipe 3 to the pouring port 2a. Pipe operating means 6 to be connected and separated from the pouring pipe 2, pulling means 7 for pulling the drawn pouring pipe 3 toward the container body 1 when the molten metal carrying container A is carried, and the molten metal carrying container A And a pouring port opening / closing means 8 having a pouring stopper C35 that closes the pouring port 2a at the time of transport of the gas.

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

  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.

  The refractory tube 2c is obtained by press-molding a ceramic raw material into a cylindrical shape and firing it, and is a dense and high-strength tube with less distortion and deformation. The material of the refractory tube is carbon-silicon carbide, silicon carbide, silicon nitride, silicon nitride bonded silicon carbide, alumina, mullite or the like.

  If such a refractory tube 2c is used for the pouring pipe 2, the corrosion resistance of the pouring pipe 2 is improved, and the lining construction is facilitated. Moreover, the wettability with respect to a molten metal becomes low by the said material, and since it is dense, there is almost no penetration of a molten metal, there is little adhesion of a molten metal, and even if it adheres, it is very easy to peel and cleaning becomes easy. .

In addition, when the pouring pipe 2 is formed by lining only the refractory material layer on the outer pipe 2b, when the refractory material is poured into the refractory material layer to form the refractory material layer, a dent due to bubbles can be formed on the inner peripheral surface of the pipe. Cause the molten metal to adhere, and if you try to remove the molten metal adhering to the dent, the refractory material will also be peeled off. Since the diameter is small, there is a problem that reworking is difficult. In this regard, such a problem does not occur when the refractory tube 2c is used.
The fireproof tube 2 c is disposed over the entire length between the pouring inlet 1 a of the container body 1 and the pouring inlet 2 a of the pouring pipe 2. Therefore, even if a crack B occurs in the refractory material layer 1b, the pressurized air can be prevented from leaking through the crack B, and the heat insulating material layer 1d, the heat insulating material layer 1d and the iron case 1a can be prevented. It is possible to prevent the pressurized air from leaking through the boundary.

  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. In addition, the pipe shaft 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 inlet 2a, and the adhesion state of the aluminum metal in the pouring pipe 2 and the refractory material Easily check the damage status of the layer.

  The drawn pouring pipe 3 is formed by lining a metal pipe 3b with a refractory material layer 3c made of a refractory material such as calcium silicate, and the refractory material layer 3c improves heat insulation and wear resistance against a molten metal fluid. I am letting. 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. 11). 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. 11A, it is possible to perform a pouring operation in a state where the extending pouring port 3a 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. 12 shows a means B for positioning the extended pouring pipe 3 at a position pulled toward the container body 1, which 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. 3 to 5, 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. 4, 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. 3, 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. 6, 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. 6 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. 7 to 10, 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. 9, 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. 10, the stopper arm C31 can be tilted and the pouring stopper 2 can be closed with 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.

As shown in FIGS. 13 and 15, a thermocouple 20 for measuring the temperature of the lining refractory material layer 1 b is provided on the side wall of the molten metal transport container A, and the thermocouple 20 is attached to the molten metal transport container A using a fixture 21. It has been. As shown in FIG. 14, the fixture 21 includes a cylindrical fixture body 22, a sleeve 23 that can be deformed and has an insertion hole 23 a as described later, and a union nut 24. The fixture body 22 includes a front male screw portion 22a and a rear male screw portion 22b, and an outer flange 22c is formed between the front male screw portion 22a and the rear male screw portion 22b.
14B, the thermocouple 20 is inserted into the fixture body 22, the sleeve 23 and the union nut 24. The sleeve 23 is positioned in the union nut 24 as shown in FIG. The fixing tool main body 22 is screwed into the rear male screw portion 22b. As a result, the sleeve 23 is in close contact with the thermocouple 20, and the fixture 21 is fixed to the thermocouple 20.

  Further, as shown in FIG. 15, a protective tube 25 is fitted at the tip of the thermocouple 20 to prevent the molten metal from being melted. The protective tube 25 is made of ceramic and is formed in a tubular shape with a closed end.

  The thermocouple 20 in which the protective tube 25 is fitted as shown in FIG. 15 is pierced into the heat insulating material layer 1d through the screw hole 26 provided in the iron shell case 1a of the container body 1, and the tip thereof is the refractory material layer 1b. The front male screw portion 22 a of the fixture 21 that contacts the back surface and is fixed to the thermocouple 20 is screwed into the screw hole 26 of the container body 1.

  Thus, since the thermocouple 20 is attached to the molten metal transporting container A by the screw type, the replacement of the failed thermocouple 20 is facilitated, and the thermocouple 20 is covered with the protective tube 25, so that the refractory material layer 1b is formed. Even if the molten metal enters the crack, the tip of the thermocouple 20 is not melted by the molten metal and the sensor function is not lost, and the durability can be improved. As shown in FIG. 1, a receiving portion 27 having a U-shaped cross section for receiving the terminal 22 a of the thermocouple 20 is provided on the outer wall of the molten metal transporting container A.

  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 The fork lifter fork (not shown) is inserted into the fork insertion member 15 and transported. 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 rotating 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. The compressed air blowing pipe 9 is connected to compressed air supply means (compressor) (not shown), the inside of the container body 1 is pressurized with compressed air, and the molten metal is drawn from the pouring port 2a of the pouring pipe 2 by the compressed air pressure. 3 is sent out and poured into a holding furnace. 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. 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. It is sectional drawing of the same embodiment which shows the state which attached the thermocouple. (A) is a front view of a thermocouple and its fixture, (b) is sectional drawing which shows the state which penetrated the fixture to the thermocouple. It is sectional drawing which shows the state which attached the thermocouple to the molten metal conveyance container using the fixing tool.

Explanation of symbols

A Molten metal container 1 Container body 2 Pouring pipe 2a Pouring port

Claims (2)

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, and the molten metal in the container main body In a molten metal carrying container configured to be pressurized with the compressed air and taken out from a pouring port at the tip of the pouring pipe,
The pouring pipe is formed by pouring a castable refractory material between an outer pipe, a refractory tube obtained by firing a refractory material made of a ceramic raw material into a cylindrical shape, and firing the refractory material. A refractory material layer formed,
A molten metal transporting container, wherein the fireproof tube is disposed so as to extend from a proximal end portion of a pouring inlet of the container body to a distal end portion of a pouring port of the pouring pipe. The molten metal carrying container according to claim 1, wherein the refractory material layer is formed so as to be in contact with an outer peripheral surface of the refractory tube.

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