FR2765843A1 - Vehicle-mounted handling device for heavy slag or liquid metal containers - Google Patents

Abstract

The handling device is for lifting, tipping, depositing of a container with lifting journals. The device has tipper arms with lifter parts (13) to engage with the journals. The lifters are freely turnable and are held in a defined relative position to the journals by a locking device (17), for lifting or after lifting of the container (1). The lifters are formed by crane- type hooks, or by rings. The inner parts of the rings in contact with the journals are born in outer parts via slide or roller bearings.

Description

DEVICE FOR MOVING A TANK, PARTICULARLY A

  CONTAINER FOR HEAVY METALLURGY

  The present invention relates to a device for moving a tank, in particular a container intended for heavy metallurgy and a vehicle for moving containers intended for heavy metallurgy. The German utility model document DE 297 10 956 discloses a vehicle intended for moving containers for heavy metallurgy. The vehicle has a tilting arm which allows the container to be lifted off the ground, placed on a platform of the vehicle and pivoted into a tilted position and an inverted position. This container intended for metallurgy, for example, a slag container must firstly be gripped in the most vertical position possible and after gripping, must be lifted on the vehicle without the contents of the container, the liquid slag, does not partially overflow the container in an amount, for example, of 100 t at a temperature of 1000 C or more and does not damage the vehicle. To this end, the tilting arm is provided at its movable end with a fork which allows to partially surround the pins applied on both sides of the container and thus to move the container. Using hydraulic cylinders, this tilting arm is pivoted in the position shown after gripping the container and it can also empty the container in a tilted position at 130 or more and place it in a 180 position with its opening facing towards floor. In the latter position, the slag container can be completely emptied; on this occasion, the slag already cooling and adhering to the container also falls. The tilting arm itself is mounted in a pivoting support at the end of the vehicle. During loading and unloading, the

  vehicle is supported by a rear stand.

  A similar vehicle is known from patent DE 36 05 665 C2. The tilting device also includes a locking and support device for the edge of the slag container. This support device can be activated after gripping the slag container and positioning it on the vehicle and thus allows the container to tilt by keeping it in a determined position relative to the

tilting device.

  Both devices and vehicles have a common problem. After the container has been gripped on the ground behind the vehicle and while the container is swiveling on the vehicle, the journal must rotate in the tilting device so that the container is oriented in the direction

  vertical and horizontal so that the slag does not overflow.

  The container pins are located in an opening of the tilting device and form there with the fork a rubbing torque. This friction must be overcome by the container when stopping the oscillation while gripping the container. This is all the more successful when the center of gravity of the filled container is low. The frictional forces generate, at a distance from the radius of the trunnion, a pair of forces which generates an opposing torque by the weight of the container at a distance from the axis of the trunnion. If the torque produced on the basis of the friction forces is greater than the opposing torque, the container does not succeed in stopping to oscillate and it has an oblique position which can lead to the overflow of slag which has been

mentionned.

  The state of the art according to patent DE 36 05 665 C2 does not prevent the slag from overflowing since during the gripping movement, the container is not held on the vehicle in the desired vertical or horizontal position, by the device additional support. The state of the art cited at the beginning according to the German document of the public utility model does not have a device which makes it possible to correct the position of the container. Attempts to reduce friction with hand applied lubricants have not been successful. In practice, there is also known a tilting and pivoting device for heavy containers which has a support similar to that of the cited German patent. In this case, the gripping element of the rocking arm is made like a crane hook and is hung on a lever mechanism supported by a hydraulic cylinder. However, this device is not suitable for emptying the container or depositing it in the inverted position and the support only discharges the hydraulic cylinder during

horizontal transport of the container.

  From patent DE 44 03 350 A 1, a vehicle is known with a tilting device which makes it possible to grasp a slag container and tilt it at an inclination of approximately 130. At the same time, the gripping element of the tilting device or the tilting arm is equipped with a closing element or a closing stirrup which is made like a crane hook, however in principle only has a closing function and a locking function for the journal on the tilting device. During tilting, the closing bracket only takes part of the weight of the container but

not while gripping it.

  This is why the object of the present invention is to create a possibility for the vertical oscillation of a container, in particular of a container intended for heavy metallurgy, the gripping, lifting, emptying and of deposit with reverse position of the container being guaranteed. In companies, in particular metallurgical companies such as steelworks, containers intended for metallurgy are often used for example for the transport of slag or liquid metal. These containers have a very long lifespan and have been partly acquired over decades. Depending on the transport device, if applicable, the center of gravity or the position of the axis passing through the center of gravity played no role in relation to the transport pins placed on the containers. In the past, in particular, such containers were often placed on a railway wagon using a crane. Currently, more and more heavy weights are used which are common on the roads for the transport of such containers intended for heavy metallurgy. In this case, regardless of the position of the axis passing through the center of gravity of the containers, it must be ensured that these containers can

  also be seized, emptied and re-deposited without damage.

  To achieve this object according to the present invention, it is provided in a first embodiment to design the tilting device disposed on the vehicle and at the same time suitable for gripping, lifting, tilting and depositing the container, also in inverted position, so that the containers are produced using a gripping element arranged on the rocking arm and intended for the pins arranged on both sides above the center of gravity of the container; said gripping elements are mounted in movable rotation and are additionally held tightly with the trunnion by means of a locking device

  taking place after gripping the container.

  By the mobile rotation of the gripping element, for example by making the latter in a sliding bearing or a rolling bearing, it is guaranteed that the container always stops oscillating after lifting by means of the element gripping so that the content of the

  container does not go overboard.

  The gripping element can be designed as a crane hook which, as such, is mounted in the tilting device

  above the hook element, for example, in sliding bearings.

  The opposing torque of the container is much stronger than in traditional devices by the fact that the distance from the axis passing through the center of gravity of the container is increased using the

hook.

  In another embodiment of the gripping element, the latter is produced as a ring or part of the ring, the internal elements of the ring making contact with the pins being mounted in an external element of the 'ring by means of a sliding bearing or a rolling bearing. In this case, an extended lever arm is not necessary because the friction can be overcome more easily by the bearing. In general, a sliding bearing or a rolling bearing specially designed to withstand the heat emitted by the

container.

  In another embodiment of the present invention, the inner member or the inner members of the gripping member are equipped with movable rotation rollers so that the pin is in these rollers and has only rolling friction , what

  makes it easier for the container to stop oscillating.

  The gripping elements, in particular in the form of a ring, can also be mounted on the tilting arms so that they are moved one on the other laterally, therefore from the front side of the

  pin, towards the center of the container and at the same time, are put

above the pin.

  The locking of the gripping element is also fixed on the rocking arm at a constant distance from the device element intended for the housing of the trunnion, this locking being designed as a movable spindle, movable for example by means of a hydraulic cylinder and in working order, grasping the gripping element from behind so that the gripping element cannot move away from the container pin and the hook remains in the

desired position.

  Furthermore, the present invention relates to a vehicle for moving such a container intended for heavy metallurgy which is

  equipped with a device according to the present invention.

  In a second embodiment, the journal itself is provided with a sliding bearing or a rolling bearing whose outer ring

  is surrounded by the gripping element when moving the container.

  This bearing can be designed as a separate element or be placed on the trunnion by the gripping element or be fixed on the trunnion. The friction of the journal is thus minimized in an intermediate member, the bearing. When the bearing is fixed, the journal can be fitted with a bearing lubricator which can be used from the front side of the bearing.

  pin and passes through the pin to go to the landing.

  The present invention should be explained more precisely with the aid of the figures. The figures show in the form of diagrams: Figure 1: a tilting device which can be mounted on a vehicle for gripping and moving a slag container; Figure 2: a vehicle with a tilting device according to Figure 1 with two container loading positions; Figure 3 a first tilting position of the container and the device; Figure 4 a second tilting position of the container and the device Figure 5 a reverse gripping position of the device and the container;

  Figure 6 a section X-X, according to Figure 1, of a part of the device.

  According to Figure 1, a tilting device for gripping and moving a slag container (1) is disposed on a corresponding carrier vehicle (6) and essentially comprises respectively two tilting arms (7) mounted on both sides of the carrier vehicle, assembled with each other rigidly in torsion and actuated by hydraulic tilting cylinders (8), the supports (9) for the arms

  tilting being arranged at the end of the vehicle frame.

  An additional tilting device (10) is mounted on the tilting arms for the complete dumping of the container (1). It is also moved by two hydraulic actuating cylinders (11) which are mounted on the rocking arm (7). At the same time, the additional tilting device (10) has a locking mechanism in the form of two hydraulic locking cylinders (12) which can engage tightly in the pockets (16) placed on the container. A gripping element, produced as a crane hook (13) is mounted for mobile rotation on the tilting arm (7). The massive hook is mounted cantilevered on the tilting arms, towards the center of the vehicle and assembled with the support (14) by the latter. By the rotational mobility of the hook (13), the container (1) oscillates even if the position of its center of gravity (2) (Figure 6) is located just below the axis of the journal (3) of the container (1). The hook (13) and the container (1) practically form a unit due to the frictional forces between the trunnion and the gripping element (13). The common point of rotation for the hook and the container is now the support (14) in the rocking arm (7). As a result, the distance between the axis passing through the center of gravity and the effective support of the container increases accordingly and the opposing torque increases correspondingly due to the center of gravity of the bucket so that the container with the hook remains constantly vertical during the movement until the deposit on the vehicle. The function of the device and of the vehicle is illustrated using the various functions of the device and of the vehicle, with reference to FIGS. 2 to 5. For gripping the container on the vehicle according to FIG. 2 (position A), the latter s approach to a container - for example a slag bucket (1) - backing up, placed on the ground or a landing. The tilting device is released by the two lateral tilting cylinders (8). The hook (13) then descends behind the grab pin of the bucket (3). The vehicle advances until the hook (13) surrounds the journal (3) as shown and the support (14) of the hook is located approximately in the middle above the journal (3). The vehicle now comes out of its rear support (15) to avoid tilting at the rear wheels of the vehicle when the bucket is raised in the loaded state. The tilting cylinders (8) move the tilting device with the bucket which is attached to it into the position (position B) in which the bucket is shown on the vehicle. While moving from the ground position of the bucket to the position on the vehicle, the bucket stops oscillating

  constantly so that the slag cannot go overboard.

  According to FIG. 3, at the unloading point, after the new exit

  of the support (14), the container tilting operation can begin.

  For this purpose, the locking cylinders (12) already mentioned of the additional tilting device (10) are introduced into the pockets (16) arranged on the container and therefore the mobility - the pivoting of the container - between the tilting arm ( 7) and the slag container (1) is blocked. In addition, two locking cylinders (17) are released which are additionally placed on the tilting arms, have a spindle actuated by a hydraulic cylinder and block the hook (13) relative to the tilting arm and at the same time, relative to the bucket while, as shown in Figure 6, the pin grips from behind the outer edge of the gripping element (3) or its element (21) and thus limits the mobility of the gripping element (13) by relative to the journal (3). Now, the two tilting cylinders (8) are out and the tilting device pivots the bucket to a position of 130 by the predetermined kinematics - as shown in Figure 3 - and therefore empties the

slag container.

  For full emptying, the container continues to be tilted according to FIG. 4 so that its opening ends up being oriented downwards. To this end, the hydraulic actuating cylinders (11) of the additional tilting device (10) are extended to reach this position. Using these cylinders, the container is pushed into the final position (inverted position) via the point of rotation (18) on the tilting arm. The synchronous movement of the additional tilting device (10) on both sides of the container is ensured

  by a torsion resistant coupling rod (23).

  After emptying the container, it must generally cool, for this purpose the bucket is again pivoted on the vehicle in the position shown in Figure 2, brought to the depot in the position shown in Figure 5 and deposited. For this purpose, the hook (covered by the tilting device) is pushed into the position shown, above the journal (3) while the vehicle moves back and then locks the locking cylinders (12) in the pockets (16) previously mentioned on the container (1). Also in this position, the locking cylinders (17) are of course extended for the hooks since, here too, the hook must be held in position in order to be able to surround the trunnion. The lock (17) does not have the function here of holding the hook on the trunnion since now the slag container is empty. After the trunnion has been surrounded, the tilting device can be moved backwards by means of the tilting cylinder (8) so that the

  container finds its fixed place (position B in Figure 2) on the vehicle.

  Figure 6 shows according to section XX of Figure 1, a detail of the gripping element (13) as it is in operating position with the pin (3) of the container 1. The gripping element (13 ) has inside an element (20) which carries the trunnion as a partial ring

  welded to the gripping element.

  According to an embodiment not shown of the present invention, the element (20) can be mounted in a sliding or rolling bearing in the external element (21) of the gripping element. As shown, this can be done in a similar manner on the support (14) of the pin of the gripping element (13) which is mounted so as to rotate with respect to the tilting arm (7). On this tilting arm (7) are also fixed the trunnion support (18) mentioned above as well as the device

  and the locking pin (17).

  In another embodiment not shown, the pin (3) can be located in the opening (22) of the gripping element (13), also in a roller support which then replaces the internal element (20)

  shown here of the gripping element (13).

Claims (8)

  1. Gripping, lifting, tilting and depositing device for a container which is provided with gripping pins arranged on both sides above its center of gravity, comprising tilting arms having gripping elements which may partially surround the pins, characterized in that the gripping elements (13) are mounted in movable rotation and are held in a relative position defined with respect to the pin, by means of a lock (17) after or for the gripping the container (1).   2. Device according to claim 1, characterized in that the gripping element is produced as a hook (13) similar to a crane hook.   3. Device according to claim 1, characterized in that the gripping element (13) is produced as a ring or part of a ring whose inner elements (20) making contact with the pins (3) are mounted in a external element (21) by means of a   sliding bearing or rolling bearing.   4. Device according to claim 3, characterized in that the interior elements (20) are made as rollers with movable rotation.   5. Device according to any one of the preceding claims,   characterized in that the lock (17) is fixed on the rocking arm (7) and has a movable pin which grasps from behind the gripping element, at a distance from an opening (22) in the gripping element   (13) intended for housing the journal (3).   6. Device according to any one of the preceding claims,   characterized in that the gripping elements are designed as arrangements which can be placed over the pins from the side   front of the pin towards the center of the container.   7. Vehicle for moving a container (1) intended for heavy metallurgy, equipped with a device according to any one of claims 1 to 6.   8. Gripping, lifting, tilting and depositing device for a container which has gripping pins arranged on both sides above its center of gravity, comprising tilting arms having gripping elements which can partially surround the pins , characterized in that the trunnion is provided with a pivoting bearing whose outer ring with movable rotation can be surrounded by the gripping elements.