JPS6362308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding gate valve for injecting molten metal from the bottom of a receiving vessel, such as a ladle or tundish, into a mold or the like. The valve of the invention has a sliding plate housed within a movable frame and having at least one outlet hole. This sliding plate is pressed upward by a spring against a top plate placed above the sliding plate.
The top plate communicates with the interior of the vessel and has an opening through which molten metal from the receiving vessel passes when the sliding plate opening is vertically aligned. The top plate is held by a mounting plate connected to the bottom of the basin, and the sliding gate frame is held by a support device provided with a tensioning device which pulls the frame and the sliding plate therein against the top plate. It is pressing against.

In known gate valves of the type mentioned above, the frame slides inside a housing forming part of the support device. Usually the housing is hinged to the mounting plate and
and is adapted to be pressed against the mounting plate by means of a suitable tensioning device, which tensioning device applies a spring which is compressed between the frame and the slide plate and presses the slide plate against the top plate. have A pressure cylinder operative to move the frame and sliding plate relative to the top plate extends laterally through the housing for connection with the frame.

Using a substantially closed housing as a support device has several disadvantages. A significant drawback is that even small amounts of escaped molten metal or other contaminants, such as tar or sand, can interfere with the free movement of the moving parts, so that the frame and the sliding plates it accommodates are not sufficiently It is the inability to move. The resulting operational breakdown has far-reaching consequences. Moreover, the housing and the sliding member therein,
and the assembly and installation of pressure cylinders requires considerable effort and expense.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to improve and simplify the device for moving the frame by omitting a housing that is difficult to assemble and has a complex structure.

To achieve this objective, the invention proposes a modification of the sliding gate valve of the above-mentioned type, whereby the support of the sliding plate is used to move the sliding plate relative to the top plate. This will be done by a drive device. Preferably, two drives are placed on either side of the frame containing the sliding plate and parallel to its longitudinal direction, and at the same time the components of these drives, which are movable in the longitudinal direction of the frame with respect to the bath, are located on the frame. Preferably combined.

In the sliding gate valve of the invention, the support housing and the sliding device therein are replaced by drives placed on both sides of the frame, these drives serving both as a support member and in addition to the movement. It also works as a driving force for the frame. By omitting the housing, the structure is open on all sides, so it will not get stuck with molten metal or other contaminants, and will therefore operate without failure. Moreover, manufacturing difficulties and costs are obviously considerably reduced. The drive proposed by the invention also assumes the function of a housing and a slidable support for the frame and the function of driving the frame.

A further particularly advantageous development of the sliding gate valve according to the invention is to provide the support device with a further drive for imparting a lateral movement to the frame. These further drives are preferably placed on either side of the frame parallel to its lateral dimension. The stationary components of the drive are rigidly coupled with respect to the bath, and the laterally movable components of the frame support the stationary components of the drive used for longitudinal movement of the frame, whereby the frame It can be selectively moved not only in its longitudinal direction but also in its lateral direction. This arrangement means that the inlet is e.g.
It is particularly advantageous that a plurality of inlets can be provided in the sliding plate, arranged alternately in rows.

The benefits of such an arrangement are obvious. By forming injection ports of various diameters on the sliding plate, the metal injection speed can be changed without changing the sliding plate. Also, increasing the number of inlets increases the expected service life of each sliding plate accordingly. Furthermore, the frame can be moved laterally, allowing adjustment of the position of the inlet relative to the inlet flow.
Thus, the highly abrasive areas at the edges of the inlets can be evenly distributed over the circumference of each inlet. A lateral movement of the frame while maintaining precise guidance in the longitudinal and lateral directions is not possible with closed housings constructed according to the known state of the art. Only the open structure proposed by the invention, which uses the drive as a drive to provide support, guidance and movement, achieves this effect.

In order to achieve favorable load relationships and compact construction, in a preferred embodiment of the invention each drive used to impart longitudinal movement to the frame includes a centrally located pressure actuated cylinder and a a connecting rod attached to the piston and extending from its ends, each cylinder being connected to the frame, and the free end of the connecting rod being a movable component relative to the mounting plate of the tank or laterally of the frame. In this case, these movable components are part of a piston-cylinder arrangement supported by a mounting plate and are for lateral movement of the frame.

Similarly, a piston-cylinder arrangement for lateral movement of a frame has a centrally located cylinder and a connecting rod extending from each end of the cylinder, the cylinder being attached to a mounting plate and the free end of the connecting rod being attached to the frame. are connected to longitudinally movable components of the frame, in which case these components are part of a piston-cylinder arrangement for longitudinal movement of the frame.

Various types of clamping devices can be used to operate the sliding gate valve of the present invention. One type of tightening device can be placed between the longitudinal motion cylinder and the frame in a manner well known in the art. This type of device has a tightenable hinged joint on one side and a tightenable releasable latch joint on the other side. Manual tightening rods commonly used in sliding gate valves having housings can also be used in the sliding gate valves of the present invention.

In other embodiments, the tightening device is placed between the drive for longitudinal movement of the frame and the mounting plate or between the drive for lateral movement of the frame.
The clamping device has an eccentric bush which is rotated by a suitable lever arrangement to increase or decrease the clamping force. The lever device can be moved in one direction or the other depending on the longitudinal movement of the frame.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, the bottom of the receiving vessel, such as a ladle, is designated by the reference numeral 11. A mounting plate 12 is attached to the bottom 11 of the receiving tank. Fireproof top plate 13 below the mounting plate
is attached with bolts 14 to prevent horizontal movement. Tank bottom 11, mounting plate 12 and top plate 13
is pierced by an inlet 15, which is lined on the inside with a suitable insert 16. A sliding plate 17 is placed near the underside of the top plate 13 and is also made of refractory material.

The sliding plate 17 has several openings 18 which extend downwards with tubes 19. The sliding plate 17 is pressed upward against the top plate 13 by a spring 20. The spring 20 is supported by a frame 21, which can move horizontally together with the sliding plate 17 contained therein.

The frame 21 is supported by a support device 22. The support device 22 serves to move the frame 21 horizontally. FIG. 3 shows the structure of the support device 22 and how it is attached to the mounting plate 12. In FIG. 3, the mounting plate 12 is shown removed from the tank bottom 11.

The support device 22 comprises two piston-cylinder devices 2 placed parallel to each other on either side of the length of the frame 21.
3, only one of which is visible in FIG. Each of the piston-cylinder devices 23 for longitudinal movement of the frame 21 is connected to the frame 21 and has a central cylinder 24 as shown in FIG.
have. A connecting rod 25 extends from each end of a piston 25' (FIG. 4) within the cylinder and is operatively connected to the mounting plate 12. Connected to the free ends of the connecting rods 25 are the free ends of two connecting rods 26 of a further piston-cylinder arrangement 27 placed parallel to the lateral dimension of the frame 21 and connecting the four corners of the support device 22. A coupling block 28 located in the section operates to move the frame 21 laterally as described below. The transverse piston-cylinder arrangement 27 of the frame 21 is constructed similarly to the longitudinal piston-cylinder arrangement of the frame 21, but its cylinder 29 is fixedly connected to the mounting plate 12 by an upright support 30. The piston-cylinder arrangement 23 and the piston-cylinder arrangement 27 thus jointly serve to support the frame 21. The piston-cylinder arrangement 23, 27 is supplied with a pressure body in a known manner so that the frame 21 can be moved longitudinally or transversely as described below.

In order to move the frame 21 in the direction of the top plate 13 and compress the spring 20 to press the frame 21 against the top plate 13, the embodiment according to FIG. 3 is provided with a tightening device between the cylinder 23 and the frame 21. , the entire device is designated by the reference numeral 31. This tightening device 31 is constructed like the known latching joint described in detail in U.S. Patent Application No. 609,344, filed September 2, 1975.
As shown in FIGS. 3, 5 and 6, it has an articulating lever, one part 32a of which is connected to the cylinder 24 and a cutout 3 in the other part 32b.
2b' engages horizontal bar 33, thereby allowing articulation joint 32c to move beyond its dead center as indicated by arrow 34 in FIG. The articulating joint 32c connects to the socket opening 3 in the boss 35 on the lever member 32b.
It is moved by a fixing rod (not shown) inserted in 5'. Similarly, the hinges placed on both sides of the frame 21 between the frame 21 and the cylinder 24 can also be tightened. This hinged connection on both sides of the frame 21 is of identical construction except that the lever member 32b is permanently pivoted to the frame by a pin 32d. In principle, this device is of the same construction as the hinge joint used with sliding gate housings. This construction allows the housing to be pivoted away from the bottom of the ladle, as shown in FIG. 6, after unlatching, for example to insert a new sliding plate 17.

The hydraulic system used to move frame 21 relative to mounting plate 12 is as shown in FIG. The part of the hydraulic system operating in conjunction with the piston-cylinder arrangement 23 for moving the frame 21 in the longitudinal direction of the mounting plate 12, shown in phantom in the drawing, is connected to a hydraulic pressure source (not shown) and the interior of the cylinder 24. It has forward and reverse action conduits 50a, 50b and 51a, 51b which are arranged in parallel and are connected to each other in pairs. As shown in the figure, these conduits are connected to connecting rod 2.
5, 26 and the connecting block 28. Conduits 50a, 50b communicate with fluid port 52 at one end and each extend to and communicate with a respective cylinder 24 in the vicinity of a respective piston 25'. Similarly,
Conduits 51a, 51b similarly extend between fluid port 53 and cylinder 24 and communicate with the cylinder in the vicinity of piston 25'. A piston 25' is fixed with respect to the mounting plate 12 and the frame 21 is fixed with respect to the mounting plate as shown in the drawings.
In order to move the working fluid upwardly, the working fluid is passed through the fluid port 52.
and the respective pistons 2 via pipes 50a and 50b.
It is necessary to enter the upper cylinder 24 of 5' with a suitable valve arrangement (not shown). At the same time, the fluid under the piston 25' returns from the cylinder 24 to the fluid source via the tubes 51a, 51b and the fluid port 53. As a result, cylinder 24
and moves longitudinally (upwardly as viewed in FIG. 4) with respect to the frame 21 and mounting plate 12 attached thereto. When it is desired to move the frame 21 in the opposite direction, the flow of the fluid is reversed to that described above.

The part of the fluid system that operates to move the frame 21 laterally with respect to the mounting plate 12 is provided by a reciprocating conduit 5 formed in the thickness of the mounting plate 12.
It has 6,57. Each of the conduits 56 and 57 has a fluid port 5 attached to the mounting plate 12 at one end thereof.
8, 59 and in communication with another source of working fluid independent of the aforementioned fluid sources. Conduit 5
6, 57 are branch pipes 56a separated from these,
56b, 57a, 57b, which communicate with opposed spaced cylinders 29 of piston-cylinder arrangement 27. Structurally, these branch lines extend inside the upright support 30 that attaches the cylinder 29 to the mounting plate 12. The branch pipes 56a, 56b connect to the cylinder 29 on the corresponding side of the piston 26' (in this case, the left side of the piston).
The branch pipes 57a and 57b communicate with the cylinder 29 on the opposite side (right side) of each piston. Since the cylinder 29 is practically fixed with respect to the mounting plate 12, in order to move the frame 21 from the left to the right as seen in the drawings, working fluid is admitted into the line 56 via the fluid port 58 and is thus The fluid then enters the interior of the respective cylinder 29 on the left side of the piston 26' via branch lines 56a, 56b. At the same time, fluid on the opposite side of piston 26' exits cylinder 29 via branch lines 57a, 57b and fluid inlet 59, thereby moving piston 26' to the left. Since the entire support device 22, and therefore the frame 21, is operatively fixed to the piston 26', movement of the piston 26' to the left causes an identical movement of the frame 21. If you want to move the frame 21 in the opposite direction,
The flow of fluid is reversed.

The embodiment of the support device 22' shown in FIG. 7 does not allow the frame 21 to move laterally. In this embodiment of the invention, the connecting rod 25 of the piston-cylinder arrangement 23
The free end of is firmly connected to the top plate 12 by a post 36. In other respects, the structure of FIG. 7 is the same as that of FIGS. 1 and 3, and corresponding components are designated with the same reference numerals.

The embodiment shown in FIG. 8 also does not allow lateral movement of the frame 21, and in this respect is the same as the embodiment shown in FIG. 7, but differs from the embodiment in FIG. It's on. The clamping device 31' shown in FIG. 8 has four eccentric bushes 37, which can rotate in bearings 38 placed on the underside of the clamping plate 12. Support rod 3
9 extends through each pair of eccentric bushes 37 and the free end of the support rod is connected via a coupling 40 to the free end of the connecting rod 25 of the piston-cylinder arrangement 23 for longitudinal movement of the frame 21. has been done. The cylinder 24 of the piston-cylinder arrangement 23 is fixed to the frame 21. By turning the eccentric bush 37 in the bearing 38, the support rod 39, the piston-cylinder arrangement 23 and the frame 21 are raised and tightened (see FIGS. 9 and 10). Eccentric bush 3
7 is provided with an upward lever 41. The upper ends of the two levers 41 on the same side of the frame are connected by a connecting rod 42, which can be moved by the frame 21 in one direction or the other as required.
For this purpose, the connecting rod 42 has a projection 4 on its underside.
3, this projection can be connected to the frame 21 or separated therefrom. In this way, the frame 21, the connecting rod 42, the lever 41 and the eccentric bush 37 can be moved in the direction of increasing or decreasing the tightening force. The tensioning device of this embodiment of the invention is disclosed in U.S. patent application Ser.
It is similar to what is described in detail in No. 763186.

11 and 13 show another type of piston-cylinder arrangement for a sliding gate valve. In the embodiment of FIG. 11, the sliding gate valve and support structure have substantially the same effect as shown in and described with reference to FIG. 7. However, in this embodiment, the piston-cylinder device 2 of FIG.
3 is an electric linear induction motor 60
It has been replaced by Each of the linear induction motors 60 on either side of the frame 21 has a movable dielectric member 61 rigidly mounted on a sleeve 62 which is attached to one end of the frame 21 and which is connected to the motor's second or It surrounds an elongated rod 63 that forms the reaction axis. As shown, the rods 63 extend between and are rigidly attached to opposing spaced posts 64, which are located at the four corners of the mounting plate 12. In this embodiment of the invention, movement of frame 12 is caused by applying an electric current to its coils to cause dielectric member 61 to move axially along rod 63, thereby moving frame 21 in the longitudinal direction of mounting plate 12. .

In the embodiment of FIG. 13, the frame 21 is driven by a reversible electric motor 70 with a suitable worm gear and drive screw. As shown, the frame 21 is attached to movable nut portions 71 at both ends thereof. Nut member 71 is actuated by a drive screw 72 which extends between posts 73, 74 along both sides of mounting plate 12. Post 73 contains a suitable bearing to allow the husband drive screw to rotate, while post 74 contains, in addition to the bearing, a worm gear arrangement for rotating the drive screw as is well known in the art. There is. The worm gears are in turn driven by a reversible electric motor 75 suspended from the mounting plate 12. The motors 75 are coupled to respective worm gear devices by drive shafts 76 extending in both directions, each of the drive shafts 76 being connected to a clutch device 7.
It accommodates 7.

Although motor 75 has been described as a reversible electric motor, this motor may in some cases
A pressure-operated motor, such as a pressurized air motor, may be preferred.

[Brief explanation of drawings]

1 is a vertical sectional view taken along the line 1--1 in FIG. 3 showing the first embodiment of the sliding gate valve of the present invention;
The figure is a schematic plan view of a sliding plate used in the sliding gate valve shown in Figure 1, Figure 3 is a perspective view of the sliding gate valve shown in Figure 1, and Figure 4 is a schematic plan view of the sliding plate used in the sliding gate valve shown in Figure 3. A schematic plan view of the hydraulic device used to drive the gate valve; Figure 5 is a vertical sectional view taken along line 5--5 in Figure 3; Figure 6 is a sectional view of the sliding gate valve when the latch is removed. , 7th
8 shows a perspective view of a simplified embodiment of a sliding gate valve, i.e. an embodiment in which the lateral movement of the frame is omitted; FIG. 8 shows a sliding gate valve with another type of tightening device; A perspective view similar to FIG. 7, FIGS. 9 and 10 showing the operation of the eccentric bush used in the embodiment of FIG. 8, and FIG. 11 a sliding gate with a different type of drive. 7 is a perspective view of the valve, FIG. 12 is a partial sectional view of the drive of FIG. 11, and FIG. 13 is a perspective view of a sliding gate valve with a further type of drive; be. DESCRIPTION OF SYMBOLS 11... Bottom of receiver tank, 12... Mounting plate, 13... Top plate, 14... Bolt, 15... Inlet, 16... Insert, 17... Sliding plate, 18... Opening, 19... Tube, 20... Spring, 21... Frame , 22, 22'
...support device, 23...piston-cylinder device,
24...Cylinder, 25...Connecting rod, 25'...Piston, 26...Connecting rod, 26'...Piston, 27...
Piston-cylinder device, 28...Connection block, 29...Cylinder, 30...Support, 31,3
1'...Tension device, 32...Lever, 32a, 32b
...Member, 32b'...Notch, 32c...Joint, 32d
...Pin, 33...Bar, 34...Arrow, 35...Boss, 3
5'...Opening, 36...Column, 37...Eccentric bush, 3
8... Bearing, 39... Rod, 40... Combined body, 41
...Lever, 42...Bar, 43...Protrusion, 50a, 50
b, 51a, 51b... Pipe line, 52, 53... Fluid port, 56... Pipe line, 56a, 56b... Branch pipe line, 5
7... Pipe line, 57a, 57b... Branch pipe line, 58, 5
9...Fluid port, 60...Motor, 61...Dielectric member,
62... Sleeve, 63... Rod, 64... Pillar, 70... Motor, 71... Movable nut member, 72... Screw, 7
3, 74...Column, 75...Motor, 76...Axis, 77
...Clutch device.

Claims (1)

Claims: 1. A sliding gate valve device for a metal injection tank, comprising: a top plate having an opening adapted to communicate with the interior of the tank; an injection aperture cooperating with the aperture;
A sliding gate valve having a sliding plate for passing molten metal from inside the vessel when the openings are axially aligned, and a support device for supporting the sliding plate against the top plate, the support device (a) a pair of spaced apart elongate members supported from the reservoir in parallel relationship on opposite sides of the injection opening; (b) a support member supporting the sliding plate in abutting relationship with the top plate; (c) a mounting device for slidably mounting the support member to each of the elongated members, and at least one of the mounting device and the elongated member is configured to open and close the injection opening. A sliding gate valve comprising a drive device for moving the sliding plate. 2. In the sliding gate valve according to claim 1, the sliding plate 17 is mounted in a frame 21 that can move together with the sliding plate, and the frame holds the sliding plate against the top plate. Spring 2 to press
A sliding gate valve characterized in that it has a zero. 3. In the sliding gate valve according to claim 1 or 2, two parallel drive devices 23 are arranged to operate simultaneously and are placed on both sides of the sliding plate 17. A sliding gate valve characterized by: 4. In the sliding gate valve according to claim 3, the sliding plate 17 is mounted in a frame 21 that can move together with the sliding plate, and one side of the frame is connected to the drive device 23. A sliding gate valve, characterized in that it is hinged on one side and the other side of said frame is removably latched to the other side of said drive device 23. 5. A sliding gate valve according to any one of claims 1 to 4, including a mounting plate 12 attached to the top plate 13 for attachment to the tank; Support columns 36, 38, 64 suspended from both ends are provided,
The stationary member is a connecting rod 2 coupled to the support column.
A sliding gate valve comprising: 5, 63, and 72. 6. In the sliding gate valve according to any one of claims 1 to 4, the device for attaching the stationary member to the top plate is a device for attaching the stationary member to the top plate. Sliding gate valve, characterized in that it has a further laterally placed drive device 27,70. 7. A gate valve according to claim 6, in which two parallel lateral drives 27, 70 are arranged to operate simultaneously and the sliding plate 1
A sliding gate valve characterized in that it is placed on both sides of the gate. 8. The sliding gate valve according to claim 6 or 7, further comprising a mounting plate 12 attached to the top plate 13 for attachment to the tank,
Said further drive device is the first described drive device 2.
A sliding gate valve characterized in that it has movable members 26, 76 connected to the stationary members 25, 63, 72 of 3. 9. A sliding gate valve according to any one of claims 1 to 8, characterized in that the drive device consists of a hydraulically actuated piston-cylinder device 24, 29. Sliding gate valve. 10. A sliding gate valve according to claim 9, characterized in that the piston-cylinder arrangement 24 has a piston rod 25 with passages 50, 51 for introducing pressure fluid into the cylinder 24. Sliding gate valve. 11. In the sliding gate valve according to any one of claims 1 to 8, the drive device is a linear induction motor 6.
A sliding gate valve comprising: 1,62. 12. A sliding gate valve according to any one of claims 1 to 8, wherein the drive device comprises a threaded rod 72 operatively connected to a reversible rotary motor 75. A sliding gate valve characterized in that a nut 71 is threadedly engaged with the rod 72. 13. The sliding gate valve according to claim 12, wherein the rotary motor 75 is a fluid pressure operated motor. 14. The sliding gate valve according to claim 12, wherein the rotary motor 75 is an electric motor. 15. The sliding gate valve according to any one of claims 1 to 14,
A gate valve characterized in that the sliding plate 17 has a plurality of injection openings 18 arranged alternately.