RU2165569C2 - Device for blank loading in and unloading from heating furnace - Google Patents

Abstract

FIELD: equipment for heating furnaces, in particular, devices for loading and unloading of heating furnaces. SUBSTANCE: the device has driving carriage 2 moving on trestle 1 and carrying yoke 3 with tongs 4 and power cylinder 5 for lifting the yoke and suspended front the front and rear supports. The front and rear supports of yoke 3 are made in the form of >-shaped levers 6 hinge-joined to carriage 2, the upper arms of the levers are interconnected by hinged tie 9, and the lower arms are hinge-joined to yoke 3. Rod 12 of vertically installed power cylinder 5 is hinge-joined to yoke 3. The device provides for gripping the blank on the furnace hearth from any row, provides for minimum dimensions of the cylinder. EFFECT: enhanced compactness of the device and its durability. 3 dwg

Description

 The invention relates to equipment for heating furnaces, and more specifically to devices for loading and unloading heating furnaces.

 A device is known for loading and unloading billets from ring furnaces, comprising a drive trolley and a trunk connected to the trolley by means of a front support in the rear, connected to a pneumatic cylinder (see ed. Certificate of the USSR N 1236290, class F 27 D 3/00, . 08.05.84, publ. 07.06.86).

 The front support is made in the form of earrings connecting the trolley to the trunk. The rear support is made in the form of rollers mounted in rails mounted on a trolley and whose axis is rigidly fixed to the trunk and pivotally connected to the hydraulic cylinder rod located along the axis of the trunk.

 This design provides the principle of combining the translational movement of the trolley and the lifting and swiveling trunk, which increases productivity.

 However, when the trunk moves up and down, the workpiece is transported in an inclined state, while the rear end of the workpiece is located below the surfaces of the jaws of the gripping pliers. This position of the workpiece does not exclude the possibility of its fall when laying on the bottom of the furnace.

 In addition, the specified design of the device for loading and unloading does not provide the ability to take blanks from any row in a multi-row layout of blanks.

 Of the known devices for loading and unloading billets from a heating furnace, the closest in technical essence is the device described in ed. testimonial. USSR N 1355850, class F 27 D 3/00, declared 10.11.85, publ. 11/30/87.

 This device for loading and unloading billets from a heating furnace contains a drive trolley moving along an overpass, carrying a trunk with a tick-shaped gripper suspended on the front and rear supports and a lifting cylinder for raising the trunk.

 The front support is made in the form of an earring connecting the trunk with the trolley, and the rear one - in the form of rollers mounted on the trunk and installed in guides mounted on the overpass.

 The trunk lift cylinder is mounted horizontally and pivotally mounted on the frame of the trolley, while its rod is pivotally connected to the earring in its middle part. When the rod of the power cylinder and the trolley moves, the earring rotates and the trunk with the tick-shaped gripper makes a lifting-turning movement relative to the rear support.

 A disadvantage of the known design of the device for loading and unloading billets from a heating furnace is that the billet rises and falls obliquely relative to the hearth of the heating furnace, because the trunk and the tick grip make a lifting and pivoting movement relative to the rear support, and this greatly complicates the loading and unloading of workpieces during their multi-row laying.

 The objective of the present invention is to provide a device that allows for plane-parallel movement of the trunk with a tick grip to enable capture of the workpiece from any row during multi-row stacking of workpieces in a heating furnace.

образных рычагов, плечи которых параллельны, верхние плечи связаны между собой шарнирно установленной горизонтальной тягой, а нижние плечи шарнирно связаны с хоботом, при этом шток силового цилиндра, установленного вертикально, шарнирно связан с хоботом.This object is achieved in that in a device for loading and unloading billets from a heating furnace containing a drive trolley moving along an overpass carrying a trunk with a tongs gripper and a trunk lifting cylinder suspended on front and rear supports, according to the invention, the front and rear supports of the trunk are made pair articulated on a trolley

shaped levers, the shoulders of which are parallel, the upper shoulders are connected together by a pivotally mounted horizontal thrust, and the lower shoulders are pivotally connected to the trunk, while the rod of the power cylinder mounted vertically is pivotally connected to the trunk.

образных рычагов, горизонтальную тягу, образующих с хоботом параллелограмм, вызывает также вертикальное перемещение задней опоры хобота.Such a constructive implementation of the device for loading and unloading billets from a heating furnace will ensure plane-parallel movement of the trunk with the tongs due to the fact that when the rod of the power cylinder lifts the trunk, mounted vertically and acting on the front support of the trunk, lowering or rising, the front support of the trunk through the system

shaped levers, horizontal traction, forming a parallelogram with the trunk, also causes vertical movement of the rear support of the trunk.

 This allows the device to capture the workpiece on the hearth of the furnace from any row.

 In addition, the proposed embodiment of the device is optimal in terms of force, since the force of the trunk lifting cylinder without taking into account friction forces is exactly equal to the weight of the trunk plus the weight of the trunk regardless of the deduction of the trunk, i.e., the distance from the front axle of the suspension of the trunk to castor oil with load .

образный рычаг через верхнюю тягу поворачивает передний

образный рычаг, разгружая цилиндр подъема заготовки.This is achieved by the fact that the force on the rear articulated support is directed vertically upward and, turning, the rear

shaped lever through the upper link rotates the front

shaped lever, unloading the cylinder lifting the workpiece.

 This ensures the minimum dimensions of the cylinder lifting the trunk and the compactness of the machine and its increased durability.

To explain the invention, a specific embodiment of the invention is provided below with reference to the accompanying drawings, in which:
in FIG. 1 shows a device for loading and unloading workpieces from a heating furnace; general form;
in FIG. 2 - the same view in plan (trunk not shown conventionally);
in FIG. 3 is a view A in FIG. 2.

 A device for loading and unloading billets from a heating furnace contains a drive trolley 2 moving along an overpass 1, carrying a trunk 3 with a tongs grab 4 suspended on a front and rear support, and a power cylinder 5 for raising the trunk 3.

образных рычагов 6, причем плечи передних рычагов параллельны плечам задних рычагов. Рычаги 6 закреплены на раме тележки 2: передние рычаги шарнирно установлены на оси 7, а задние рычаги на оси 8.The front and rear supports of the trunk 3 are made in the form of a pair

shaped levers 6, and the shoulders of the front levers are parallel to the shoulders of the rear levers. The levers 6 are mounted on the frame of the trolley 2: the front levers are pivotally mounted on the axis 7, and the rear levers on the axis 8.

 The upper shoulders of the levers 6 are interconnected by a pivotally mounted horizontal rod 9. The lower shoulders of the levers 6 of the front support are pivotally mounted on the axle frame 3 of the trunk 3 mounted on the brackets 10, to which the rod 12 of the cylinder 5 for lifting the trunk 3 mounted vertically on the drive carriage is pivotally connected 2. The lower shoulders of the levers of the rear support are pivotally connected with the trunk 3.

 The device operates as follows.

 In the initial position, the carriage 2 is stationary, the rod 12 of the power cylinder 5 is installed in the middle position.

 To capture the workpiece from the hearth of the furnace, a power cylinder 5 is turned on, the rod 12 of which presses on the axis 11, moving the front of the trunk down. The front levers 6 are rotated relative to the axis 7 and, through the rod 9, rotate the rear levers 6, the lower shoulders of which by turning lower the rear of the trunk. As a result, the trunk moves vertically and at the same time its horizontal position is maintained.

 The lifting of the workpiece is carried out with the reverse movement of the rod 12.

 The proposed device for loading and unloading billets from a heating furnace in comparison with the known ones allows to expand the technological capabilities of the device due to plane-parallel movement of the trunk, ensuring the capture of any workpiece during multi-row laying of billets in the furnace. The possibility of multi-row stacking of billets will increase the productivity of the furnace.

 The device also allows to increase the reliability of operation, since it excludes the possibility of catching the transported workpiece on the workpiece lying on the bottom or on the threshold of the furnace.

Claims (1)

A device for loading and unloading billets from a heating furnace, comprising a drive trolley moving along an overpass, carrying a trunk suspended from the front and rear supports with a tongs and a lifting cylinder for the trunk, characterized in that the front and rear supports of the trunk are made in the form of a hinge mounted on the trolley couples

shaped levers, the shoulders of which are parallel, the upper shoulders are connected together by a pivotally mounted horizontal thrust, and the lower shoulders are pivotally connected to the trunk, while the rod of the power cylinder mounted vertically is pivotally connected to the trunk.

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