摘要:
An apparatus is disclosed for use in replacing a worn pouring pipe by moving a pouring pipe from a waiting position to a pouring position beneath a discharge opening of a metallurgical vessel, and for use in adjusting flow of molten metal from the metallurgical vessel through the discharge opening. For this purpose, slide rails are provided beneath the metallurgical vessel for supporting head plates of pouring pipe in the waiting position, the pouring position and a discharge position. Also, a linear actuator is provided for pushing the pouring pipe from the waiting position to the pouring position, and can be detachably coupled to the head plate of the pouring pipe so that it can move the pouring pipe in opposing direction to adjust the flow of molten metal through the discharge opening between zero flow and full flow. A base plate can be optionally provided between the metallurgical vessel and the head plates of the pouring pipe, and a second linear actuator can be provied for sliding the base plate relative to the discharge opening of the metallurgical vessel and/or relative to the head plate of the pouring pipe in the pouring position.
摘要:
A rerouting mechanism is used in an assembly including a driven member movable in a driven direction to operate the movable plate of a slide gate and drive unit for moving the driven member in the driven direction and including a drive member movable in a driving direction out of alignment with the driven direction. The rerouting mechanism transfers movement of the driving member in the driving direction to movement of the driven member in the driven direction. The rerouting mechanism includes a guide member defining a bent guideway aligned with the driving direction and the driven direction. A flexible force transfer element is positioned within the guideway and is movable therealong while flexibly deforming to the configuration thereof. The transfer element has opposite ends connected to the driving member and to the driven member. Upon movement of the driving member in the driving direction, the transfer element forcibly is moved along the guideway while the transfer element flexibly deforms to the configuration of the guideway. At the same time, the driven member is moved in the driven direction.
摘要:
A rotary and/or axial slide plate valve for controlling the discharge of molten metal from a metallurgical vessel includes a refractory fixed valve part and a refractory movable valve part at least partially disposed within the fixed valve part, the valve parts having respective peripheral surfaces which establish a seal therebetween. An electromagnetic drive is provided for moving the movable valve part between open and closed positions of the valve. The electromagnetic drive may facilitate rotary and/or axial movement of the movable valve part.
摘要:
A metallurgical vessel such as a tundish fitted with a slide gate at its underside for discharging its contents has the slide gate controlled by a drive that can be removed to another vessel when required. The drive comprises a hydraulic cylinder with a drive rod projecting from it and carrying a coupling releasably engageable with the slide gate. The cylinder and drive rod are clamped non-rotatably in use but when attaching or removing the drive they can be rotated about a common longitudinal axis to alternative angular positions in which the slide gate is coupled or uncoupled thereto. Changeover of the drive can be made quickly thereby. A double-ended drive constructed in this manner can be used with vessels having two controllable outflow devices and provides for an equally quick changeover.
摘要:
Disclosed is a method and apparatus for indicating the position of a hydraulically actuated device by measuring the volume of hydraulic fluid flow in and out of the hydraulic actuator together with separate measurement corrections to compensate for the hydraulic system elasticity and transient flows and for the mechanical clearance or slop in the linkage between the actuator and the device. In a preferred embodiment of the method, the compensation for hydraulic system elasticity and transient flows is preferably made by measuring the relaxation reverse flow when the actuator is depressurized and using this measurement to offset an equal amount of the measured forward flow when the actuator is repressurized in the same direction. Further, the compensation for mechanical clearance in the linkage between the actuator and the device is applied only when the actuator direction is reversed; the amount of such compensation is empirically determined and may increase with wear and tear on the linkage. This compensated hydraulic fluid flow measurement as a position indicator is especially advantageous in indicating the position of a sliding gate valve used for teeming molten steel. The high temperature and corrosive environment about such a sliding gate valve preclude use of prior-art valve position indicators. However, the present invention permits the entire measurement apparatus to be located at a distance from the sliding gate valve.
摘要:
A slidable gate mechanism for controlling flow of material from an outlet in the bottom wall of a vessel. The gate is mounted in a carrier which is supported for sliding movement under the bottom wall. Springs mounted on a side wall of the vessel act on the carrier to urge the gate upwardly toward the bottom wall. The springs are remote from the outlet and do not require air-cooling.
摘要:
An operating mechanism for a slidable gate used to control flow of material from a bottom pour vessel. The mechanism includes a linear-motion device (for example a fluid-pressure cylinder and piston) pivoted to a side wall of the vessel and extending in a direction approaching the vertical. A linkage and preferably an air-cooled rigging mechanically connect the linear-motion device with the gate. In this location the linearmotion device does not extend out from the bottom of the vessel and is not an obstacle, and it can be installed more conveniently or detached between operations.
摘要:
An operating mechanism for slidable gates used to control flow of material from a bottom-pour vessel. Mechanism includes a cylinder and reciprocable ram for shoving gates into vertical alignment with vessel outlet. Gate may be either a blank for closing the outlet, or provide a nozzle to permit pouring. As each gate is shoved into alignment with the outlet, it shoves the preceding gate on past. Cylinder is supported on pivoted links, whereby it can swing out of the way to facilitate loading a new gate into a ''''ready'''' position.
摘要:
A method is provided, in particular for maintaining a slide gate (10) of a vessel containing metal melts. The slide gate (10) comprises a housing (11), a slide unit guided longitudinally in this, a holding element (15), a linear drive (12) which can be located in this for adjusting the slide unit, at least one electrical line and/or a connection line (16, 17, 18) for a medium, such as gas or air. The connecting of the at least one electrical line and/or the connection line (16, 17, 18) for the medium takes place in this situation by means of a plugging action. This plugging action of the at least one connection line (16, 17, 18) takes place automatically with the moving of the linear drive (12) into the holding element (15), and/or the detachment takes place automatically when it is moved out of the holding element (15). As a result, handling is more easily achieved in particular at the maintaining of the slide gate by means of a robot, and, at the same time, the process stability and the operational safety are increased during the casting.
摘要:
A sliding closure (10) at the outlet of a metallurgic container is provided with a housing (12), at least one closing plate arranged therein, a longitudinally displaceable closing plate and a cover (15), fastened to the housing (12) by means of a bracing mechanism (20). The closing plates can be pressed against one another by the bracing mechanism (20) via the cover (15). The bracing mechanism (20) having at least one spring member (33) is provided with clamping levers (21, 22) pivotably housed on either side at the housing (12) and supports (23, 24) which cooperate with same, with the result that, by pivoting these clamping levers (21, 22), the cover (15) can be fastened to, or released from, the housing. In this way, the closing plates, which often need to be exchanged, can also be braced, always uniformly and optimally, against one another, even after many operational uses.