Carrying device and method for frontal removal of a roll body from a roll frame, and roll frame having a roll body which can be removed frontally

Abstract

A carrying device (1) for the frontal removal of a roll body from a roll frame, comprising a main frame (2) and a receiving section (3) for the roll body. The receiving section (3) can be transferred from an introduction position (E) into a supporting position (S). The receiving section (3) has a profile which at least partially encloses the roll body in the supporting position (S), and the carrying device (1) can be pushed in below the roll body with the receiving section (3) in the introduction position (E), and the roll body is carried with the receiving section (3) in the supporting position (S).

Claims

1. A roller body carrying device that is configured for use in frontal removal of a roller body from a roller mill, the roller body carrying device comprising: a main frame comprising first and second spaced apart legs which each have a substantially L-shaped form, and a receiving section configured to receive the roller body, the receiving section is configured to be movable, relative to both the main frame and the roller body, between an introduction position and a supporting position, a first end of the receiving section being pivot-mounted, about a horizontal axis, to a first end region of the first and second spaced apart legs while an opposed second end of the receiving section being movable, relative to both the first and the second spaced apart legs, by actuating means for actuating the carrying device to facilitate moving the second end of the receiving section between the introduction position and the supporting position, and vice versa, the receiving section has a profile which, in the supporting position, at least partly encloses the roller body, with the receiving section moved into its introduction position by the actuating means for actuating the carrying device, the roller body carrying device is thereby configured to be capable of being inserted underneath the roller body and braced against a frame of the roller mill by guiding means which are removably arranged on the roller mill within a product space of the roller mill, which product space extends between a product pull-in area and a product exit area, and with the roller body carrying device positioned underneath the roller body and braced against the frame of the roller mill by the guiding means which are arranged on the roller mill within the product space of the roller mill and with the receiving section moved into its supporting position by the actuating means for actuating the roller body carrying device, the roller body is supported by the roller body carrying device.

2. The roller body carrying device according to claim 1, wherein one leg has additional guiding means.

3. The roller body carrying device according to claim 1 wherein the actuating means comprises a threaded rod.

4. The roller body carrying device according to claim 3, wherein the threaded rod is mounted in a threaded bushing, and the threaded bushing is mounted in a same leg of a substantially L-shaped main frame with two legs standing at an angle to each other as the receiving section.

5. The roller body carrying device according to claim 4, wherein the threaded rod is connected at one end to an expanding joint in a way that is rotatable, yet firm against pushing and pulling, the expanding joint is expandable by rotating of the threaded rod, and the receiving section can be moved from the introduction position into the supporting position.

6. The roller body carrying device according to claim 5, wherein the receiving section can be moved from the introduction position into the supporting position by increasing a distance between the threaded bushing and the end of the threaded rod which is connected to the expanding joint.

7. The roller body carrying device according to claim 3, wherein the threaded rod is provided with means for accommodating a drive unit that communicates with and rotationally drives the threaded rod.

8. The roller body carrying device according to claim 1, wherein means for limiting the movement of the receiving section are provided.

9. A roller mill with a plurality of rolls, wherein at least one roller comprises a roller body with two roll stubs, the roller body is releasable from the roller mill by moving the two roll stubs away from each other, wherein the guiding means for a roller body carrying device in accordance with claim 1 are removably arranged beneath the at least one roller within the product space of the roller mill such that the roller body carrying device can be braced against the frame of the roller mill by the guiding means such that the roller body can be removed frontally, and wherein the roller body carrying device is movable in a direction perpendicular to the roller axis.

10. The roller mill according to claim 9, wherein the guiding means enables a guiding of the roller body carrying device perpendicular to a plumb-line.

11. The roller mill according to claim 9, wherein the guiding means comprise at least one guide rail.

12. A method for a frontal removal of a roller body from a roller mill with a plurality of rollers, wherein at least one roller comprises a roller body with two roll stubs and the roller body is releasable by moving the two roll stubs away from each other, the method comprising: introducing at least one roller body carrying device in accordance with claim 1; lifting of the receiving section of the at least one roller body carrying device such that the roller body is in an operative connection with the roller body carrying device; releasing of the roller body by moving the two roll stubs away from each other, so that the roller body is resting on the at least one roller body carrying device; and moving the at least one roller body carrying device perpendicularly to the roll axis.

13. The roller body carrying device according to claim 1, wherein joint segments couple the main frame, the receiving section and the actuating means to one another to facilitate moving the second end of the receiving section between the introduction position and the supporting position, and vice versa.

14. The roller body carrying device according to claim 13, wherein the joint segments and the actuating means are located between the main frame and the receiving section.

15. The roller body carrying device according to claim 13, wherein a first joint segment is connected to the actuating means, a second joint segment is connected to the main frame and a third joint segment is connected to the receiving section.

16. The roller body carrying device according to claim 1, wherein the actuating means is located vertically underneath the receiving section.

17. A roller body carrying device that is configured for use in frontal removal of a roller body from a roller mill, the roller body carrying device comprising: a main frame comprising first and second spaced apart legs which each have a substantially L-shaped form, and a receiving section configured to receive the roller body, the receiving section is configured to be vertically movable, relative to both the main frame and the roller body, between an introduction position and a supporting position, a first end of the receiving section being pivot-mounted, about a horizontal axis, to a first end region of the first and second spaced apart legs while an opposed second end of the receiving section being movable, relative to both the first and the second spaced apart legs, by actuating means for actuating the carrying device to facilitate moving the second end of the receiving section between the introduction position and the supporting position, and vice versa, the roller body carrying device being laterally movable toward and away from a pair of rolling stubs which support the roller body, and the roller body carrying device, when in its supporting position supporting the roller body, facilitates laterally moving the roller body to a service position away from the pair of rolling stubs, the receiving section has a profile which, in the supporting position, at least partly encloses the roller body, with the receiving section moved into its introduction position by the actuating means for actuating the carrying device, the roller body carrying device is thereby configured to be capable of being inserted underneath the roller body and braced against a frame of the roller mill by guiding means which are removably arranged on the roller mill within a product space of the roller mill, which product space extends between a product pull-in area and a product exit area, and with the roller body carrying device positioned underneath the roller body and braced against the frame of the roller mill by the guiding means which are arranged on the roller mill within the product space of the roller mill and with the receiving section moved into its supporting position by the actuating means for actuating the roller body carrying device, the roller body is supported by the roller body carrying device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention shall be better described with the aid of a preferred sample embodiment in conjunction with the drawing. There are shown:

(2) FIG. 1 a preferred embodiment of the roll carrying device according to the invention in an introduction position;

(3) FIG. 2 the roll carrying device of FIG. 1 in the supporting position;

(4) FIG. 3 a perspective view of the roll carrying device of FIG. 2;

(5) FIG. 4 a perspective view of a roller mill;

(6) FIG. 5 a perspective view of the roller mill of FIG. 4 with visible rails for the roll carrying device and roll carrying devices; and

(7) FIG. 6 a schematic, cross sectional side view of the roller mill of FIG. 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(8) FIGS. 1 and 2 show a roll carrying device, respectively in an introduction position E and a supporting position S, from the side. The roll carrying device of FIG. 2 is shown in perspective in FIG. 3.

(9) The carrying device 1 is assembled from a main frame 2 and a receiving section 3 for the roll.

(10) The main frame 2, looking from the side, has an L-shaped profile with a long leg 21 extending substantially horizontally and a shorter leg 22 extending substantially vertically. A reinforcing strut 23 joins the two legs 21 and 22 and confers stability on the structure. Rollers 4 are arranged at both ends of the leg 21 and thus allow the displacement of the carrying device 1. The roller 4 situated in the area of the connection of the two legs 21 and 22 is supported by the axle 41. The other roller 4, situated at the end of the long leg 21, is supported by an axle 42.

(11) The receiving section 3 has a bent profile and is mounted at the free end of the short leg 22 on a pivot axis 24 and can thus be moved from an introduction position E, in which the free end of the receiving section 3 lies lower than the lowest point of the roll being removed, into a supporting position S in which the roll being removed is supported on both sides against rolling off.

(12) As can be seen in FIG. 3, the main frame 2 consists of two mirror-symmetrical parts which are held at a spacing by spacing sleeves, which are respectively placed on the axles 41 and 42. Between the two parts is arranged the receiving section 3, which likewise serves as a spacer.

(13) Means 5 are provided for actuating the carrying device 1, ensuring the secure supporting and displacement of the roll. The means 5 in this preferred sample embodiment comprise a threaded rod 6, which is pivot-mounted in a threaded bushing 7. The threaded bushing 7 is arranged in one cutout 13 of the short leg 22. The cutout 13 enables an axial transmission of forces—with respect to the threaded rod 6—yet it is profiled such that the threaded rod 6 can swivel about an axis perpendicular to the threaded rod axis in order to follow a change in the height position of one end 8 of the threaded rod 6. The other end of the threaded rod 6 is provided with a T-shaped handle 14.

(14) In order to allow the swiveling of the receiving section 3, the end 8 of the threaded rod 6 interacts with an expanding joint 9. The expanding joint 9 in this sample embodiment comprises three joint segments 91, 92 and 93, which are mounted to swivel about a common axle 10. The joint segment 91 is provided with a rotary joint 81, which receives the end 8 of the threaded rod 6, making possible a rotation of the threaded rod 6 and likewise making possible the axial transmission of forces—with respect to the threaded rod axis. The other joint segments 92 and 93 are in operative connection with the support frame 2 and the receiving section 3, respectively. The joint segment 92 is able to swivel about the axle 42. The joint segment 93 is likewise pivot-mounted with the receiving section 3 by the axle 31.

(15) The joint segment 92 also plays the part of a spacer for the main frame 2.

(16) By turning the threaded rod in the corresponding direction of rotation, the spacing between the end 8 of the threaded rod 6 and the threaded bushing 7 can be increased or decreased, after which the receiving section 3 can be raised or lowered. In the area of the axle 31 the receiving section 3 has a projecting lug 11, which together with the receiving section 3 in the supporting position experiences an end stop against a bolt 12 of the joint segment 93 and limits the movement of the receiving section 3.

(17) FIG. 4 shows schematically a roller mill 50. A roll 51 is indicated by an arrow. The roll 51 (and a roll 51′ not visible in FIG. 4) comprises a roll body 52, which is carried by two roll stubs. The roll stubs are configured such that they can be moved apart axially with respect to the roll 51 or 51′, so that the roll body 52 is released.

(18) Beneath the rolls 51 and 51′, guide rails 53 can be arranged in a product space 55. This can be seen in FIGS. 5 and 6, while FIG. 6 also shows the second roll 51′ schematically.

(19) Beneath a respective end region of the roll body is situated a guide rail 53, which is designed to receive and guide a carrying device 1. In FIGS. 5 and 6, one carrying device 1 is arranged respectively on the guide rail 53.

(20) The guide rail 53 and the carrying device 1 are coordinated with each other such that the carrying device 1 can only move along the guide rail in the direction perpendicular to the roll axis, apart from a tolerable sideways play. Moreover, the guide rails 53 are situated vertically to the rolls 51 and 51′, so that upon releasing the roll body 52 it cannot roll out uncontrollably from the roller mill 50.

(21) In order to remove the roll body 52 of the roll 51, a carrying device 1 is inserted into the corresponding guide rail 53 and situated underneath the roll body 52 in the product space 55. Of course, the receiving section 3 should be located in the introduction position E, or else the positioning of the carrying device 1 would not be possible. After the carrying device 1 has been arranged underneath the roll body 2, the receiving section 3 is raised into the supporting position S and then the roll body 52 is released by moving apart the roll stubs 51a, 52a. The roll body 52 can then be removed from the roller mill 50.

(22) After the removal of the roll body 52 of the roll 51, the same can be done for the roll 51′.