JPS637413Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a support for an air seal pipe for continuous casting that allows the air seal pipe for continuous casting to be extremely efficiently and reliably attached to and removed from the collector nozzle attached to the rotary nozzle at the bottom of the ladle. It is related to the device.

Usually, molten metal such as molten steel taken out from a ladle into a tundish during continuous casting is taken out through an air seal pipe to prevent oxidation and to prevent slag on the surface of the tundish from getting mixed in with the hot water flowing from the tundish to the mold.

Air seal pipes used for this purpose have conventionally been supported by a support device using a lever 1 and a counterweight 2, as schematically shown in FIG.

In this conventional device, the air seal pipe 3 is
It is swingably supported at the tip of a lever 1 which moves up and down around a trunnion 4 serving as a fulcrum, and is brought into close contact with a collector nozzle attached to a rotary nozzle 6 at the bottom of a ladle 5 by means of a counterweight 2.

With such a structure, it is necessary to make the counterweight 2 significantly large in order to balance the dynamic pressure of the molten metal at the start of pouring, which poses a problem in operability and safety.

Also, rotary nozzle 6 and air seal pipe 3
It was difficult to align the two and required a lot of effort.

Furthermore, although the frictional force due to the viscosity of the molten metal is applied as a load during pouring, this load is extremely small, and the counterweight 2, which has a size that balances the molten steel dynamic pressure, is not only unnecessary, but conversely, the collector nozzle , there was a risk of damage to the rotary nozzle and air seal pipe.

Therefore, based on the above-mentioned viewpoints, the applicant of the present application has developed a system that eliminates the need for heavy counterweights that may damage the collector nozzle, rotary nozzle, and air seal pipe, and supports the air seal pipe safely at all times, as shown below. We proposed a support device for air seal pipes for continuous casting that is easy to operate and has good operability (Utility Application No. 100611/1983). That is, FIG. 2 is a side view of this device, and FIG. 3 is a plan view thereof.
As shown in the drawing, the main pillar 8 is erected at a fixed position on the lifting deck 7 of the ladle car (not shown).
Attach the base 9A of the first arm 9 to the
The arm 9 can be rotated horizontally.

A support 10 is provided above the tip 9B of the first arm 9.
is installed so that it can rotate horizontally.

On the other hand, the base 11A of the second arm 11 is attached to the lower side of the tip 9B of the first arm 9, so that the second arm 11 can be rotated horizontally.

Base 11A of the support column 10 and second arm 11
The center of rotation is on a common vertical axis, and brackets 12, 12 are erected on the upper surface of the column 10 at positions equidistant to the left and right with the center of rotation in between.

The brackets 12, 12 are provided with shaft holes 13, respectively, at equal height positions in a vertical plane that includes the axis line that is the center of rotation of the support column 10, and in a vertical plane that is perpendicular to the horizontal center line between both brackets. Trunnions 15, 15 projecting from symmetrical positions on both sides of the middle portion of the beam 14 are inserted into these shaft holes.

The beam 14 is a beam that can rotate in the horizontal direction around the support column 10 and can also rotate in the vertical direction around the trunnions 15, and as shown in FIG. lower, rear 14
B is made high and the intermediate portion 14C is inclined.

26 is provided at the upper part of the air seal pipe 3,
A pair of trunnions 1 that hold the air seal pipe 3 and face each other through the center are provided on the outer periphery of the air seal pipe 3.
It is a ring-shaped metal holder with 6 and 16 parts. beam 1
A trunnion receiver 27 having a recess for engaging and supporting the trunnion 16 is formed at the tip of the trunnion 4 . By mounting and engaging the trunnions 16, 16 with the trunnion receivers 27 at the tips of the beams 14, the air seal pipe 3 is supported at the tips of the beams 14 so as to be able to swing around the trunnions 16, 16. ing.

On the other hand, the second arm 11 is bent into an L shape, and a cylinder 17 is attached to the upwardly facing tip 11B.

The cylinder 17 is an air cylinder whose axial direction is vertical, and the tip of the rod 18 is inserted into the vertically penetrating hole 19 in the rear part 14B of the beam 14, and the trunnion 21 is attached to the brackets 20, 20 on the beam. 21. In addition,
The cylinder 17 is an air cylinder with an intermediate stop (a commercially available product, for example, a product name: CELLOCK CYLINDER), and is capable of freely stopping and holding the rod 18 at any position.

The beam 14 also has an operating handle 22 at its rear end, and an operating device 23 for controlling the cylinder 17 is attached near this operating handle.

It should be noted that the tundish shown by imaginary lines in the figure and designated by the reference numeral 24 is a conventional tundish placed on the tundish car 25.

In this device constructed as described above, an operator climbs onto the lifting deck 7 of the ladle car, grasps the operating handle 22, and freely displaces the beam 14, thereby moving the air seal pipe 3 to the rotary shaft at the bottom of the ladle 5. Operate so as to tightly connect it to the collector nozzle attached to the nozzle 6. That is, beam 1
4 is the movement of the first arm 9 which horizontally rotates around the support 8 when the operating handle 22 is held and moved;
The movement of the column 10 that is located on the tip 9B of the first arm 9 and rotates horizontally, and the column 1 caused by the cylinder 17
The second arm 11, which supports the cylinder 17, rotates horizontally following the beam 14. Therefore, the air seal pipe 3 can be connected to the collector nozzle. Furthermore, by sending a predetermined air pressure to the cylinder 17, the air seal pipe 3 can withstand the dynamic pressure of molten steel and support the air seal pipe 3. When the load is light due to the viscosity of the molten steel, it is sufficient to send low pressure to the cylinder 17. Since the beam 14 of the pipe 3 is restrained by the locking action of the cylinder 17, there is no risk of it coming off during work, and even if the air pressure that becomes the operating pressure disappears, the cylinder 17 will not move. Safety is maintained.

However, such an air seal pipe support device has the following problems. That is, the trunnion 16 of the ring-shaped metal holder 26 holding the air seal pipe 3 is merely placed on the trunnion receiver 27, and the air seal pipe 3 can be tilted around the trunnion 16. Only. On the other hand, Tandaitsuyu 24
The gap between the ladle 5 and the air seal pipe 3 is shorter than the length of the air seal pipe 3. Therefore, when installing the air seal pipe 3 to the collector nozzle, the ladle 5 is lifted above the ladle car with a crane.
In this state, the air seal pipe 3 must be attached to the collector nozzle using an air seal pipe support device. In addition, when replacing the air seal pipe in so-called continuous casting, a ladle containing molten steel is prepared separately and hoisted by a crane. Lift the ladle 5 above the ladle car with a crane,
In that state, remove the air seal pipe 3 from the collector nozzle using the air seal pipe support device, then replace the empty ladle 5 with a new ladle containing molten steel using a crane, and place the new ladle above the ladle car. The air seal pipe 3 removed from the empty ladle 5 must be immediately attached to the new ladle using the air seal pipe support device while the ladle remains lifted. Therefore, in the above case, a crane must be used to install and replace the air seal pipe 3, which increases the time required to install and replace the air seal pipe 3. In addition, the air seal pipe 3 must be installed and removed while the ladle is lifted by a crane. Therefore, it is difficult to reliably attach and detach the attachment and detachment in a short time. In addition to the above cases, ladle 5
It is also possible to create and use a ladle car with a long lifting stroke so that the gap between the air seal pipe 3 and the tundish 24 can be made longer than the length of the air seal pipe 3. In this case,
To avoid lifting the ladle 5 with a crane, prepare two ladle cars and two ladles, and attach a new air seal pipe to the new ladle containing molten steel on the ladle car, which is sufficiently horizontally away from the tandem dumpster 24. Put it on,
This and the empty ladle 5 can be replaced by moving the ladle car. However, since the ladle (ladle car) is moved with the air seal pipe attached, the equipment around the tandem tray 24 must be made sufficiently low so as not to interfere with the movement of the air seal pipe, resulting in very high equipment costs. However, modifying existing existing equipment will also result in extremely high equipment costs.

Therefore, this invention was devised to solve the above-mentioned problems, and consists of a pillar, a beam rotatably and tiltably supported by the pillar, a trunnion receiver provided at one end of the beam, and a beam supported by the pillar in a rotatable and tiltable manner. An air seal pipe for continuous casting, which has a driving means connected to the other end portion for tilting one end of the beam, and a ring-shaped support having a trunnion and holding the air seal pipe at the upper part of the air seal pipe. In the support device of
a rotating member for tilting the air seal pipe around the trunnion, the base end of which is pivotally supported on the trunnion receiver, and the rotating tip portion of which has a length such that it comes into contact with the outer circumferential surface of the air seal pipe; a link mechanism configured to include a movable member and having the beam as a fixed node; and a rotation drive means attached to the beam that is coupled to the link mechanism and rotates the rotation member. It is characterized by the provision of .

This invention will be described below with reference to embodiments and drawings.

FIG. 4 is a side view showing one aspect of the air seal pipe support device according to the invention, FIG. 5 is a plan view of the device, and FIG. 6 is a front view of the center of rotation of the device (in the figure, The same parts as in FIGS. 2 and 3 are designated by the same reference numerals). As shown in the figure, the air seal pipe 3 is connected to the trunnion 16 by having its base end pivotally supported on the trunnion receiver 27 at the tip of the beam 14 and having a length such that the rotating tip portion comes into contact with the outer peripheral surface of the air seal pipe 3. The rotating member 29 for tilting around the center is a link mechanism configured to include the rotating member 28 and having the beam 14 as a fixed node.
30 is connected to the link mechanism 29 and rotates the rotating member 28
This is a cylinder mechanism as a rotation driving means attached to the beam 14 for rotating the beam.

31 is a first arm 9 attached to the upper end of the main column 8;
17' is a hydraulic cylinder mounted on the tip 11B of the second arm 11, 22' is an operation frame provided at the rear end of the beam 14, and 23' is an operation frame for operating the beam 14. This is an operating device for operating the hydraulic cylinder 17', the cylinder mechanism 30, and the hydraulic motor 31, which is mounted near the frame 22'.

The rotating member 28 is attached to the trunnion at the tip of the beam 14 at two locations across the ring-shaped bracket 26 so that it is coaxial with the pair of trunnions 16 of the ring-shaped bracket 26 holding the air seal pipe 3. The base end is rotatably supported on the outside of the receiver 27. As shown in FIGS. 5 and 7, the rotating tip of the rotating member 28 is curved so that a portion thereof has the same diameter as the outer circumference of the air seal pipe 3. A contact member 28a that contacts the surface is attached. beam 1
4, on both sides in the longitudinal direction,
Rods 32 are arranged respectively. As shown in FIGS. 5 and 7, the front portion 14A of the beam 14
has a beam 14 in a direction perpendicular to its length.
A support shaft 33 is attached to pass through the support shaft 33, and one end of a first lever 34 is attached to both ends of the support shaft 33. One end of the rod 32 is connected to the rotating member 2.
The other end of the lever 8 is connected to the other end of the first lever 34 . Thus, the front part 1 of the beam 14
4A is a fixed joint, and a (parallel) link mechanism 29 is formed by this front portion 14A, the rotating member 28, the rod 32, and the first lever 34.

As shown in FIG. 7 etc., one end of the second lever 35 is attached to the middle part of the support shaft 33.
The tip of a rod of a cylinder mechanism 30 attached to an intermediate portion within the beam 14 is connected to the other end of the second lever. Thus, the operation of the cylinder mechanism 30 causes the support shaft 33 to rotate (move), thereby driving the link mechanism 29 and rotating the rotating member 2.
8 rotates, and its rotating tip presses the outer peripheral surface of the air seal pipe 3 to tilt it. The operating range of the link mechanism 29 is, as shown in FIG. 8, a free rotation range a until the rotation tip of the rotation member 28 comes into contact with the outer peripheral surface of the air seal pipe, and a rotation tip of the rotation member 28. The air seal pipe 3 (ring-shaped metal holder 26)
can be easily set in the trunnion receiver 27, and can be provided with a degree of freedom that increases followability when it is attached to the collector nozzle of the rotary nozzle 6.

As shown in FIG. 9, for example, a hydraulic cylinder 1
By operating 7' and the cylinder mechanism 30, the beam 14 and the air seal pipe 3 can be tilted. Note that, as shown in FIG. 5, the beam 14 is rotated by the operation of the hydraulic motor 31. Therefore, hydraulic cylinder 1
7', cylinder mechanism 30, and hydraulic motor 31
By operating the operation device 23', the beam 14 and the rotating member 28 can be moved extremely efficiently.

With the above configuration, the gap between the ladle 5 placed on the ladle car and above the tundish dish 24 and the tundish dish 24 is
Even if it is shorter than the length of the air seal pipe 3, by tilting the beam 14 and tilting the air seal pipe 3, the vertical height of the air seal pipe 3 can be substantially made shorter than its actual length. Therefore, without lifting the ladle 5 above the ladle car by a crane, the ladle 5 and the tundish 24 that remain on the ladle car can be removed by turning and tilting the beam 14 and tilting the air seal pipe 3. The air seal pipe 3 can be brought into the narrow space between the two from the outside, and vice versa, making it possible to easily and quickly attach and detach the air seal pipe 3 (even in the case of continuous casting). can be done.

As explained above, with this invention, it is possible to attach and detach the air seal pipe to and from the collector nozzle of the rotary nozzle of the ladle extremely efficiently, quickly and reliably, and (1) when the ladle is placed on the ladle car. Since the air seal pipe can be attached and detached, there is no need to use a crane, increasing safety. (2) The ladle lifting stroke of the ladle car is short, reducing equipment costs. (3) Efficiency of continuous casting can be increased with slight modification of existing equipment. Effects such as these are brought about.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an example of a conventional device;
The figure is a side view of a previous design related to this design, No. 3
The figure is a plan view of the same, FIG. 4 is a side view showing one aspect of the main part of the air seal pipe support device according to the invention, FIG. 5 is a plan view of the main part of the device, and FIG. 6 is a side view of the main part of the device. FIG. 7 is an enlarged plan view of the front part of the beam, FIG. 8 is an enlarged side view of a part of the beam, and FIG. 9 shows the operating state of the beam and rotating member. It is a figure showing an example. 10... Strut, 14... Beam, 17'... Hydraulic cylinder, 26... Ring shaped bracket, 27...
Trunnion receiver, 28... Rotating member, 29... Link mechanism, 30... Cylinder mechanism.

Claims (1)

[Claims for Utility Model Registration] A column, a beam rotatably and tiltably supported by the column, a trunnion receiver provided at one end of the beam, and a beam connected to the other end of the beam. A supporting device for an air seal pipe for continuous casting, comprising a driving means for tilting one end, and a ring-shaped metal fitting that holds the air seal pipe and has a trunnion at the upper part of the air seal pipe, a rotating member for tilting the air seal pipe about the trunnion, the rotating member having a length such that a rotating tip portion contacts an outer circumferential surface of the air seal pipe; a link mechanism configured with the beam as a fixed node; and a rotation drive means attached to the beam and coupled to the link mechanism to rotate the rotation member. A support device for air seal pipes for continuous casting.