JPH0775771B2 - Sliding gate for molten metal flow control valve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding gate for a melt flow rate control valve.

[0002]

2. Description of the Related Art There are two types of sliding gate valves attached to a molten metal container such as a tundish, one of which is a sequentially moving type and the other of which is a reciprocating type. As shown in, for example, Japanese Patent Publication No. 52-18137, the sequential movement type has a plurality of sliding gates sequentially moved along a guide path with respect to a pouring opening of a molten metal container such as a tundish, and sliding with an orifice. When the gate overlaps with the pouring opening, the molten metal is caused to flow, and when the sliding gate without holes overlaps with the pouring opening, the flow of the molten metal is stopped. The reciprocating type is, for example, Japanese Patent Publication No. 58- As shown in Japanese Patent No. 41142, one sliding gate having an orifice is placed on a support frame and reciprocally moved to flow molten metal when the orifice coincides with the pouring opening, and stop flow when the orifice comes out of the pouring opening. It is configured as follows.

The former has the advantage that it can be quickly replaced when the sliding gate is worn, but the flow rate is changed by replacing the sliding gate with one having a different orifice diameter, so that continuous flow rate control is not possible. However, there is a problem in that a large number of sliding gates with different orifice diameters must be prepared, and in the latter case, by moving the sliding gate and changing the overlap between the orifice and the pouring opening of the container, the flow of molten metal is restricted. Since the flow rate is adjusted, continuous flow rate control is possible, but when the sliding gate becomes worn, it must be replaced by replacing it with a new one by opening the well mechanism and removing it from the support frame. There is a drawback that the operation must be stopped for a long time during this period.

For this reason, the sliding gate has the advantage that it can be quickly replaced when it wears, and the sliding gate valve is given the ability to adjust the flow rate indefinitely from fully open to fully closed by the throttling action. Thus, a sliding gate valve which has solved the conventional drawback of having to prepare a large number of sliding gates has been proposed in Japanese Patent Publication No. 1-59071. This sliding gate valve basically belongs to the progressive movement type sliding gate valve, but is equipped with two independently actuable driving devices, one of which is supported on a guide structure, that is, a support rail. A series of slidable gates, which are operated to send the sliding gates sequentially to the operating position along the support rail, and the other one is connected to the support rail to move the support rail laterally independently of the first drive device. With this structure, the valve can be closed immediately when a danger occurs and the flow rate of the molten metal can be immediately returned to the adjusted flow when the danger disappears and the flow of molten metal is desired to be restored. Have the ability.

[0005]

However, in the valve described in Japanese Patent Publication No. 1-59071, the pouring orifice of the sliding gate is provided at the center of the sliding gate, and the support rail is slid laterally. Even when the moving gate is fully moved in the closing direction, the pouring orifice of the sliding gate partially communicates with the pouring opening of the container, and the molten metal flow cannot be completely closed. Therefore, in order to completely shut off the flow of molten metal when replacing the pouring tube assembly, the sliding gate with an orifice must be replaced with a sliding gate without holes. This results in extra operation and wasted use of the sliding gate.

One solution to this problem is to lengthen the stroke of the drive that moves the support rail laterally so that the sliding gate's pouring orifice is not in complete communication with the container's pouring opening. The solution is to be able to move the moving gate, but this solution has to enlarge the space to give lateral movement to the support rail in response to the extension of the stroke. This solution therefore leads to an increase in the size, weight and production costs of the valve device.

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems without extending the stroke of a support rail drive device. To achieve this object, the present invention provides: Sliding gate with holes makes molten metal pouring
Brought to a position where molten metal can flow out of the pouring opening of the tank
Move the sliding gate so that
A slender guide structure for dynamic guidance and restricting the flow of the molten metal
Adjust the position of the sliding gate with respect to the pouring opening for the purpose.
The guide structure on which the sliding gate is mounted for knotting
In the direction in which the sliding gate moves along the guide structure.
On the other hand, a molten metal pouring valve device having a device for moving laterally
In a substantially rectangular refractory body having a pouring orifice and a shoulder extending parallel to the longitudinal axis of the refractory body and engaging the guide structure. And a pouring orifice arranged on the lateral axis of the refractory body with a deviation from the radius of the pouring orifice with respect to the longitudinal axis. And a sliding gate is provided.

[0008]

Since the sliding gate of the present invention is provided with the pouring orifice laterally offset to the extent of exceeding its radius, it increases the stroke of the drive mechanism for laterally moving the guide structure, that is, the support rail. Alternatively, when the sliding gate is moved fully in the closing direction, the pouring orifice of the sliding gate can be moved to a position completely out of the pouring opening of the container.

[0009]

【Example】

1 and 2, a slide adapted to be operatively installed at a spout 12 in a lining 14 of a pouring tank 16 such as a tundish for pouring molten metal into a mold of a continuous casting apparatus (not shown). A dynamic gate valve structure 10 is shown. For pouring, operate a perforated refractory sliding gate as shown by 17 in FIGS. 2, 6 and 7 or a non-perforated refractory sliding gate as shown by 17 'in FIG. 1 with respect to the refractory top plate 18. Controlled by. Sliding gate valve structure 10 also includes a replaceable spout tube assembly 19 that forms an extension of the valve to direct the flow of spouted melt to the casting machine mold. The sliding gate valve structure 10 is adapted to be attached to the tank 16 by a threaded connection 20 extending through a hole 21 in the frame 22. That is, the screw coupling body 20 attaches the frame 22 to the mounting plate 2
3 and further the mounting plate 23 is attached to the vat with bolts (not shown) that connect to nut plates 24 below the vat lining 14. It is preferable to insert the heat insulating pad 26 formed of asbestos or the like between the mounting plate 23 and the tank 16.

As shown in FIG. 4, the mounting plate 23 is a generally flat metal plate having a central opening 28 for receiving the lower end 30 of the refractory material forming the bath spout 12. The upper surface of the mounting plate 23 has a recess 31 along its side edge, which recess communicates with a bolt hole 32 for receiving a nut 34 cooperating with the threaded connection 20.

The mounting plate 23 is provided with a plurality of internal fluid passages for guiding the cooling air and the inert gas when the valve is operated. A first passage 36 concentric with the central opening 28 is defined by a recess formed in the wall of the opening and covered by a ring 38,
The ring is welded to the mounting plate to seal the passage. Further, the mounting plate is formed with a pair of oppositely extending elongate passages 40, 42 which extend around the three sides of the mounting plate and terminate in a downwardly directed outlet 44 which, as will be described in more detail below, in a valve spring. Supply cooling air. An air inlet 46 is provided on one side of the mounting plate for delivering cooling air to the fluid passages 36, 40, 42, which passages are connected in series as shown by arrow 48, whereby the cooling air is first of all annular passage 36.
And then in both directions via passages 40, 42 before being discharged via outlet 44.

Also provided in the mounting plate 23 is an elongated passage 50, which communicates with an inert gas source at one end and communicates with an opening 52 on one side of the mounting plate and at the other end a valve which will be described later. To a downwardly directed discharge opening 54 adapted to communicate with a gas supply in the top plate 18 of the.

The valve frame 22 formed of a metal casting that is reinforced with a member 56 is shown in particular in FIGS. The frame 22 accommodates the operating parts of the valve structure, and is attached to the mounting plate 23 or removed from the mounting plate 23 as a unit assembled by the screw coupling body 20. The frame 22 has three main parts, namely the plate mounting part 58, the actuating part 60 and the plate ejecting part 62 shown in FIG. Near the plate mounting portion 58, the frame 22 includes a bracket device 66 for mounting the feed drive 68 and a threaded hole 64 (FIG. 8).
It is attached by a coupling body (not shown) that can be engaged with. The feed drive 68 comprises a fluid actuated cylinder 70 having a reciprocable piston which mounts a pusher 74 with a piston rod 72. A second set of drivers, called "iris drivers," is mounted to the frame 22 near its working portion 60. These drivers 76 work in opposition,
It then operates separately from the supply driver 68. Each of these has an actuating cylinder 78 mounted to the frame by a bracket 80, which is attached to the frame side wall with a coupling engageable with a hole 82 (FIG. 9). Each of the cylinders 78 houses a reciprocable piston, a rod 83 of the piston mounts a laterally long coupling clasp 86 which couples a sliding pin 88, the sliding pin 88 opening 90 in the frame side wall.
(FIG. 9) Mount throttle rails 84, 84 'received and guided within and operative to operate a sliding gate located within the working portion 60 of the frame. Rail 84 '
Is shorter than the rail 84 to allow the gate to pass through the mounting portion 58 of the frame.

The interior of the frame 22 is shaped to define a passage through which the sliding gate 17 or 17 'and the spout tube assembly 19 can move between a mounting portion 58, an actuating portion 60 and a discharge portion 62 of the frame, respectively. Has been. The mounting portions 58 of the frame 22 described here are the sliding gates 17,
17 'and the spout tube assembly 19 are defined by laterally extending guideways 92 and 94 (FIG. 9). The guideway 92 is vertically spaced from the guideway 94 by oppositely extending slide rails 96, which serve to support a sliding gate mounted in the valve. Guideway 9
The bottom of 4 is defined by a set of similar sliding rails 98 that support the spout tube 19 to be mounted. The contact rails 99 along the roof of this part of the frame serve to vertically position the sliding gate 17 as it moves from the valve mounting portion 58 to its working portion 60.

As shown in FIGS. 8 and 9, the frame 22 is provided with the same guide paths 92 'and 94' on opposite sides of the frame, so that a sliding gate or a pouring tube can be inserted from the right side or the left side. Is being done. When guideways 92, 94 are selected for use, 9 on the other side of the frame
These guideways, shown as 2 ', 94', are plug members 10.
0 (FIG. 3), this member is vertically spaced apart from the back plate 102 which is screwed to the frame 22 at the hole 104 (FIG. 8) and which is filled vertically with stop plates 106, 94 '.
108 to effectively prevent the spout tube from moving past a desired position near pusher 74. Obviously, mounting from the opposite side of the frame simply moves the padding member 100 from the guideways 92 ', 94' to the opposite guideways 92, 94 '.
It is easily done by shifting to fill.

The working portion 60 of the frame 22 includes a square opening 110 in its top surface for receiving the stationary refractory top plate 18, the central opening 112 of the refractory top plate being aligned with the spout 12 from the vat to the gate valve structure 10. Define an entrance. Opening 1
Frames 22 are provided vertically below and spaced apart from one another, and frame 22 is provided with oppositely spaced bases 114 which cooperate with the upper wall of the frame to define a cavity 115.
The base 114 is laterally spaced with threaded holes 116 which operate to hold the spout tube assembly 19, the sliding gate 17 or 17 ', and the top plate 18 in a face-to-face sealing relationship. It receives a combination 118 that mounts a series of spring bias levers 120. The lever 120 swings on a rocker 122 held by a combination 118 and is spring biased by a headed push pin 124 movably mounted in a hole 126 in the frame. The hole 126 is countersunk at its upper end to provide a push pin head 128 and a seat for the spring 130, the spring being inserted between the push pin head and the opposing surface of the mounting plate 23.

As shown in FIG. 2, the holes 12 in the frame 22 are shown.
6 communicates with the outlet 44 of the mounting plate 23, whereby cooling air is supplied so as to prevent overheating of the spring 130. The outlet 44 preferably has an outlet 132 for effectively distributing the cooling air to the respective spring assembly.

A pair of vertically spaced alignment holes, indicated at 196 and 198, are provided on each side wall of the valve frame 22 near the actuating portion 60. Each pair of alignment holes is adapted to receive a selectively positionable stop pin 200 which traverses the respective path of motion of the sliding gate or spout tube assembly and during the gate replacement process. When it is desired to replace 17 or spout tube assembly 19 with another sliding gate or spout tube assembly, it operates to prevent movement of either. Similar holes 196 'have rails 84,8
4 '(FIG. 1) to allow the stop pin 200 to pass through. When it is desired to replace both the sliding gate 17 and the spout tube assembly 19 at the same time, the stop pin 2
00 is completely withdrawn from the frame, freeing it not to block both paths. Stop pin 200 under normal operating conditions
Are retained in the lower pair of holes 198 to free the passage of motion of the sliding gate so that the flow of molten metal can be quickly stopped as described below. The discharge portion 62 of the frame 22 is formed by vertically spaced guideways 134, 136 that open at the ends of the frame (FIG. 9). Guideway 13
4, 136 are formed on the longitudinal extension of the base 114,
A stepped shoulder 138 acting as a rail adapted to slide guide the sliding gate 17 or 17 'and the spout tube assembly 19, respectively, from a position within the operating portion 60 of the valve to a discharge point described below. , 140.

As can be seen in FIG. 3, the diaphragm rail 84,
Reference numeral 84 'is a guide structure for moving and guiding the sliding gates 17, 17'.
It acts as a structure and is placed in the frame 22 at substantially the same height as the sliding gate mounting guide path 92. The rail 84 extends longer than the rail 84 'and extends substantially the entire length inside the frame. On the other hand, the rail 84 'is shorter than the rail 84 so that the sliding gate 17 can be passed from the guide passage 92 to a position related to the pusher 74 when the sliding gate is mounted. Rail 84
Further comprises a plurality of longitudinally spaced magnets 142 along a length facing the guideway 92 (FIG. 1), where the magnets are six 4-pole permanent magnets. ing. Its function is to prevent the sliding gate 17 or 17 ', in the ready-to-install position, from falling out of the rail 84 while the rail is moving to serve the throttling function of the valve, as described below.

As shown in FIG. 1, the sliding gates 17, 17 ', the top plate 18 and the spout tube assembly 19 of the well structure 10 are each substantially made of a refractory material enclosed in a metal frame. The spout tube assembly 19 intended for use in the above valve structure is of conventional construction made up of an elongated cylindrical tube 144 having an axial opening 145. Tube 144 is of a length such that its lower end can extend into a caster mold or the like (not shown). The upper end of the tube 144 is adapted to be received in a recess 146 in the lower surface of a generally flat rectangular refractory plate called the tube holding plate 148. The tube holding plate 148 has a through opening 149 coaxial with the tube opening 145, and is surrounded by a metal casing 150 around the exposed portion at the bottom and the periphery thereof.

As shown, mortar cement is used to seal the seam between the upper end of tube 144 and retaining plate 148 and to mount the retaining plate within the metal casing. The metal casing may be provided with a sagging down skirt 152 to protect the mortar joint and strengthen the casing bottom. A heat resistant material such as asbestos rope (not shown) can be used to fill the gap 153 between the skirt and the tube. Tube 1
The secondary attachment between 44 and the retainer plate is provided with a collar 154 defining a shoulder 156 near the top of the tube.
56 to the metal casing 15 with screw fasteners (not shown)
This is done by engaging a retaining ring 158 that is removably attached to zero. The opening 145 of the pouring tube 144 and the opening 149 of the holding plate 148 are formed to have a diameter slightly larger than the opening of the sliding gate so that metal can be discharged from the passage when the valve is closed to the fully closed state. Is preferred.

The top plate assembly 18 of this valve structure is shown in FIGS.
It is shown in FIG. The top plate assembly 18 has a rectangular refractory material 160 secured by mortar in a metal casing 162 having a generally L-shaped periphery. The upper surface 164 of the refractory 160 extends above the upper edge of the metal casing and when the top plate assembly is within its operative portion of the valve structure, the mounting plate 2
Polishing is done to provide a smooth face-to-face contact between the bottom surface of 3 and the refractory lining 14 of the tank. Refractory 1
60 is a permeable refractory insert 168 in the form of a porous plug having an axial opening defining a melt flow opening 112 through the refractory.
A stepped through opening 166 is provided in the center for receiving. The insert 168 has a stepped outer surface 172 that complements the refractory opening 166, and the outermost step is cemented with the mating step of the opening. The middle step is significantly smaller in diameter than the middle step of the aperture. In this way, an annular passage 174 is defined around the insert 168 for supplying inert gas through the insert to the melt opening 112. The refractory is provided with a ramped passage 176 which opens at the top of the refractory at 178 and is positioned to communicate with the opening 54 in the underside of the mounting plate 23 when the valve is assembled. Thus, the inclined flow path 176 provides a convenient device for supplying the inert gas into the melt flow path 112 while the valve is closed, thereby agitating the metal in the melt flow path and preventing its solidification. By forming the annulus in this manner, the top plate assembly 18 can be made by conventional refractory forming methods without the need for costly machining with fragile or component-rich work tools.

The sliding gate assembly used in the valve structure is shown in FIG.
17 'without holes or with an opening 180 as shown at 17 in FIGS. 2, 6 and 7. The non-perforated gate 17 'is used to block the flow of molten metal through the valve as shown in FIG. 1, while the perforated gate 17 is used when it is desired to control the passage of molten metal through the valve as described below. Be seen. Both the gates 17 and 17 'are roughly quadrangular in which the supply direction shown in FIGS. 6 and 7 (F), that is, the vertical axis direction is a throttle direction shown in (T), that is , slightly shorter than the horizontal axis direction. Of refractory plate 182 are made in the same manner. The refractory plate 182 is cemented in a metal casing 184 that surrounds the perimeter of the refractory plate. The metal casing 184 has a sliding rail 96 for seating engagement on the throttle rails 84, 84 'and at the valve mounting portion 58.
A shoulder 186 (FIG. 1) is provided on the top, and at its discharge portion 62, midway between its upper and lower edges for sliding engagement on the shoulder 138. The refractory plate 182 is formed with a shoulder 188 (FIG. 2) that complements the shoulder of the metal casing.

The lower portion of the metal casing, indicated at 190, is formed with a large radius of curvature to provide a guide cam surface, so that when the respective sliding gate assembly is moved by pushers 74 into the operative portion of the valve, neither member will move. The sliding gate assembly can be guided above the upper edge of the spout tube retention assembly without damage.

The lower part of the refractory plate 182, which is close to the large curvature lower part 190 of the metal casing, is inclined as shown in the drawing, and an enlarged storage part 192 for mortar is provided between the refractory plate and the metal casing.
Is provided. The large mortar bed in this area of the sliding gate assembly cushions the sliding gate as it moves across the tube holding assembly 19 and when it is manipulated by the moveable rails 84, 84 'during throttling. Work to do so.

The sliding gate assembly 17 includes an assembly 17 ',
The latter is non-perforated, whereas the former has a melt flow opening 180. The position of the opening 180 in the refractory plate is precisely located along the longitudinal center line of the refractory plate, but is an amount equal to 1/2 of the stroke of the sliding pin 88 from the center point of the refractory plate to the left in FIG. 2 so that the refractory plate makes a full stroke to the right as viewed in FIG. 2 and the opening 180 pours vertically aligned with the opening 112 in the top plate when the rail 84 'contacts the wall 194 of the cavity 115. The molten metal passing through the passage can be flowed at the full flow rate. When the gate 17 makes a full stroke to the left and the rail 84 contacts the wall 194, the opening 180 is completely disengaged from the opening 112, thereby stopping the flow of melt through the valve. By operating the diaphragm driver 76, the position of the opening 180 in the gate 17 is adjusted to the top plate opening 112.
Can be adjusted to any desired position midway between these full stroke positions, thereby changing the effective size of the melt flow path through the valve to adjust the melt flow rate therethrough.

A typical commercial embodiment of the sliding gate assembly 17 is approximately 277 mm (10.9 mm) along the feed direction (F).
Inch), 328 mm (12.
The center of an opening 180, which is 9 inches long and has a diameter of 76 mm (3 inches), is approximately 44 mm (1.
75 inches) so that when the gate 17 is in the blocking position, it is approximately 13 mm (1 mm) between openings 112 and 180.
/ 2 inch) refractory material.

The operation of the valve structure 10 described herein is as follows. The valve frame 22 has a top plate 18 as shown in FIG.
The non-perforated sliding gate 17 'and the pouring tube assembly 19 are pre-assembled in the working portion 60 of the valve frame to remove the pouring tank 16'.
Is attached to the mounting plate 23 below. The flow passage opening 112 through the top plate 18 is then the spout 1 through the tank lining 14.
Vertically aligned with 2. The flow of molten metal through the valve does not flow when the molten metal is put into the tank. Non-perforated sliding gate 17 '
It is blocked due to the obstruction of the flow path. During this metal holding period, an inert gas such as argon or nitrogen permeates the porous wall of the insert through the passage 50 of the mounting plate 23 and the passage 176 of the top plate leading to the annular passage 174 around the insert 168. Then, it enters the pouring hole 112 of the top plate. The introduction of the inert gas thus serves to stir the melt in the blocked flow path, thereby preventing it from solidifying therein. Cooling air is also admitted to the valve via the inlet 46 of the mounting plate 23 from which air sequentially flows through the annular passage 36 around the lower region of the tank lining 14 to cool the refractory material in this region and then to the passage. 40, 42 and an outlet 44
Is discharged (FIG. 4) and cools the spring 130 (FIG. 2).

When the diaphragm device places the rails 84, 84 'in the position shown in FIG. 2 where the rail 84 contacts the cavity wall 194,
The perforated sliding gate 17 is manually inserted into the mounting portion 58 of the valve. Sliding gate 17 is inserted into guideway 92 with sliding gate shoulder 186 slidably engaged on sliding rail 96. The sliding gate 17 is moved until its leading edge surface abuts against the rail 84 and is held by the magnet 142 with respect to the rail 84, and thus the sliding gate 17 is supplied to the feed driver 6.
8 in its ready position near pusher 74. The feed drive 68 is then actuated, the pusher 74 moves the sliding gate 17 from its ready position to the actuating portion 60 of the valve frame 22 between the top plate 18 and the spout tube assembly 19, and the imperforate gate 17 ' Discharge part 6 along the shoulder 138
It slides to 2, where it is removed from the frame. The effective face-to-face seal between each fire plate is the spring pressure lever 120.
Given by the lever, the lever pushes the tube holding plate 148 upwards towards the sliding gate 17, and then pushes the sliding gate 17 upwards towards the top plate 18. Sliding gate 1
Due to the large radius lower portion 190 of the metal casing 184 of FIG. 7, the sliding gate is guided across the opposite edges of the spring-loaded spout tube retainer plate 148 without damaging the spout tube retainer plate. The feed drive 68 is then actuated in the opposite direction, retracting the pusher 74 to the position of FIG. 1, at this time, for safety, the imperforate sliding gate 17 ', as shown in FIG. In the mounting portion 58 which is the position,
It is inserted in a manner similar to that described above for inserting the perforated sliding gate 17.

When it is desired to start flowing the molten metal through the valve, the flow of the inert gas to the opening 112 is stopped, and the diaphragm driving member 76 operating integrally therewith slides on the rails 84, 84 'and the rails. The gate 17 is operated to move laterally within the cavity 115. Normally, the diaphragm driver 76 operates to move the rails 84, 84 'to bring the rails 84' into contact with the wall 194 of the cavity 115, thereby opening the opening 180 of the sliding gate 17 to the opening 112 of the top plate 18.
To be aligned in the axial direction. This defines the fully open position of the valve. Alternatively, when it is desired to make the flow rate of the molten metal smaller than the total flow rate, the throttle driving body can be controlled so that the sliding gate 17 is placed at an arbitrary intermediate position between the fully opened and fully closed positions. Can create a flow rate. Further, in the pouring process, the sliding gate 17 with respect to the top plate pouring opening 112.
By controlling the operation of the throttle driver 76 that applies the throttle movement of the opening 180, the position of the sliding gate can be changed to increase or decrease the flow rate of the molten metal through the valve as desired.

[0031]

According to the present invention, since the pouring orifice is provided in the lateral direction of the sliding gate so as to be offset to the extent of exceeding the radius of the pouring orifice, the sliding gate can be poured into the container without increasing the total stroke. It is possible to completely close the exit opening, thus eliminating the waste of using a holeless sliding gate when replacing the support tube assembly.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a molten metal flow rate control valve using a sliding gate of the present invention.

2 is a cross-sectional view taken along line 2-2 of FIG.

FIG. 3 is a horizontal sectional view taken along line 3-3 in FIG.

FIG. 4 is a partially cutaway perspective view of a mounting plate of the control valve of FIG. 1, showing a flow path of cooling air and an inert gas.

5 is a partially cutaway perspective view of a top plate used in the control valve of FIG. 1. FIG.

FIG. 6 is a plan view of a sliding gate of the present invention.

7 is a perspective view of the sliding gate of FIG.

8 is a perspective view from above of the valve frame structure before assembly of the control valve of FIG. 1. FIG.

9 is a perspective view from below of the valve frame structure of FIG. 8. FIG.

[Explanation of symbols]

 10 sliding gate valve structure 12 spout 14 lining 16 pouring tank 17 perforated gate 17 'non-perforated gate 18 top plate 19 pouring tube assembly 22 frame 23 mounting plate 58 mounting part 60 working part 62 discharge part 68 supply drive Body 74 Pusher 76 Throttle driver 84, 84 'Rail 112 Opening 142 Magnet 144 Tube 145 Opening 146 Recess 148 Holding plate 149 Opening 180 Pouring orifice 190 Metal casing 196, 198 Hole 200 pin

Claims (4)

[Claims] 1. A sliding gate having a hole is provided for a molten metal pouring tank.
Brought to a position where molten metal can flow out of the pouring opening
Also, a plan to move the sliding gate so that it comes out of the position
The elongated guide structure inside and the purpose of restricting the flow of the molten metal
To adjust the position of the sliding gate with respect to the pouring opening.
In order to mount the sliding gate on the guide structure,
To the direction in which the sliding gate moves along the guide structure
A sliding gate operated by a molten metal spouting valve device having a device for lateral movement, wherein the sliding gate is a) a substantially rectangular refractory body having a pouring orifice, b) means for forming a shoulder that extends parallel to the longitudinal axis of the refractory body and engages with the guide structure; and c) offset to the longitudinal axis to an extent exceeding the radius of the pouring orifice. And a pouring orifice arranged on the lateral axis of the refractory body. 2. The method according to claim 1, further comprising a metal casing surrounding the refractory body, wherein the shoulder forming means engaging with the guide structure is formed in the casing. Sliding gate. 3. The method of claim 1, wherein the degree of offset of the pouring orifice from the longitudinal axis is equal to about half the distance the gate moves between the fully open and fully closed positions. Sliding gate. 4. The method according to claim 3, further comprising a metal casing surrounding the refractory body, and the shoulder forming means engaging with the guide structure is formed in the casing. Sliding gate.