EP1754556B1 - Apparatus for a quick connecting or a quick dismantling of two big and heavy parts for a metallurgical plan, particularly for a continuous casting apparatus for steel - Google Patents

Abstract

The apparatus has a hydraulically steered clamping unit (1) having a hydraulic plunger (10) and which a clamping piston (14) forms with a centric diaphragm spring column (13). The housing (9) of the clamping unit is connected to a construction unit (2), and which clamping pistons penetrates two construction unit. The clamping piston has a clamping head (17) which is provided in opposite direction to the first construction unit against the second construction unit (4).

Description

The invention relates to a device for a quick connection or a quick release of two large, heavy components for the metallurgical plant operation, in particular for a steel continuous casting machine.

Such components are used in steelworks, rolling mill and especially in steel continuous casting. To carry out repairs or maintenance, disassembly takes place at the place of use. The release of piston-cylinder drives, for example. In support roller segments of the continuous casting, is time consuming and material and usually takes place in the workshop using additional tools and means of transport. Such a support roller segment is from the EP 1 232 813 A1 known. For connection, simple nut-nut pairings are used, which are used between a segmental frame and an exchangeable cassette.

The US-A-5915460 discloses a resilient device between the support frame and the lower segment of a guide element. The spring-elastic mechanism consists of one or more preloaded disc springs, which are preloaded by means of a hydraulic nut.

The invention has for its object to improve the known hydraulic clamping units to the effect that occurring during connection or loosening difficulties are avoided.

The stated object is achieved in that a hydraulically controlled clamping unit is provided, wherein the clamping force by means of a Hydraulikplungers, which forms a clamping piston with a central disc spring column, can be generated and adjusted, the housing of the clamping unit is connected to the first component and the clamping piston penetrates the first and the second component and carries a detachable with the clamping piston clamping head, which is stretched in the connection state in the opposite direction to the first component against the second component. A significant advantage of this clamping unit is the fast locking and unlocking of the clamping when connecting or when releasing piston-cylinder actuators, which serve for the employment of a Losrollensegments against a Festrollensegment. In this case, a reduction of the change times of the support roller segments is achieved. The connection-related design allows the separate removal of roller segments and piston-cylinder drives from a continuous casting apparatus and also provides overload protection of the assemblies in the event of a failure in the casting process.

A time saving when connecting or disconnecting is u.a. achieved in that on the end of the tensioning piston a star head with detent recesses or tooth gaps rotatably disposed and inserted into a ring member of the clamping head, which is arranged axially fixed in the clamping head and secures the clamping position of the clamping head to the second component.

In this case, an embodiment is that the ring element of the clamping head slides in a circumferential groove of the star head and by means of an externally arranged pivot unit in the circumferential angle to correspondingly arranged locking recesses or tooth gaps of the star head is rotatable. A rotation of the ring element by, for example, 30 ° (or a multiple of 30 °) prepares the positive connection of the clutch for transmitting the clamping force. The swivel unit is easily accessible and can be operated by hand.

When hydraulic relief of the hydraulic plunger, the prestressed diaphragm spring column takes over the clamping force of the two components in that the clamping force of the diaphragm spring column can be transmitted via the star head on the ring member and the clamping head to the second component.

An improvement is also that a rotation of the clamping piston in the housing is prevented together with the star head in the clamping head by means of a rotation.

In the drawing, an embodiment of the invention is shown, which will be explained in more detail below.

Fig. 1

einen Anwendungsfall innerhalb eines Stützwalzengerüsts für eine Stahl-Stranggießmaschine in Seitenansicht,

Fig. 2

einen axialen Schnitt durch die erfindungsgemäße Spanneinheit und

Fig. 2A

einen radialen Schnitt gemäß Schnittebene B-B in Fig. 2 des verriegelten Zustandes.

Show it:

Fig. 1

an application within a support roll stand for a steel continuous casting machine in side view,

Fig. 2

an axial section through the clamping unit according to the invention and

Fig. 2A

a radial section according to sectional plane BB in Fig. 2 of the locked state.

In Fig. 1 an application example of the clamping unit 1 is shown, which is located on a straight or curved portion of a strand guide for casting strands of metal, in particular steel. A support frame 2 accommodates piston-cylinder drives 3 and is connected by means of four clamping units 1 with a fixed side frame 4, on which an adjustable by means of the piston-cylinder actuators 3 Losseitenrahmen 5 in a guide. On the fixed side frame 4 are fixed side rollers 4a and rotatably mounted on the lot side frame 5 Losseitenrollen 5a and arranged in segmental design. After releasing the clamping units 1, the support frame 2 can remain in its drawn position and the fixed side frame 4 is moved away in the direction of arrow 6 in a guide 7 and fed to a maintenance. After releasing the clamping units 1 also clutches 8 are opened, which connect in the operating position respectively piston rods 3a of the piston-cylinder drives 3 via this clutch 8 with a piston rod extension 3b, which is articulated in a joint bearing 5b. In Fig. 1 Both the clamping units 1 and the clutches 8 are closed.

One of the clamping units 1 is in the Fig. 2 and 2A shown in detail. In a housing 9 which is fixed to the support frame 2, wherein the support frame 2 carries the piston-cylinder actuators 3, a hydraulic plunger 10 is mounted. The hydraulic plunger 10 is equipped with a hydraulic port 11. The hydraulic plunger 10 forms via an annular collar 11 a, an outlet 11 b and takes on a central journal 12, a plate spring column 13 and a clamping piston 14. The single-acting hydraulic plunger 10 presses the disc spring column 13 together and clamps them. While the housing 9 is supported against the support frame 2, the tensioning piston 14 penetrates the support frame 2 and the fixed side frame 4 and is inserted with a star head 15 in a ring member 16 of a clamping head 17, wherein the clamping element 17 surrounding the ring member 16 in tension against the outer Surface of the fixed side frame 4 is pressed. The tensioning piston 14 extends through a sealed opening 18 of the support frame 2 and further through a passage 19 of the fixed side frame 4. On the clamping piston 14 is located in the region of the passage 19 at circumferential intervals latched the star head 15. In addition, marks, tooth spaces, locking recesses o. Like. Provided on a shoulder 14a, in which a detent pin 21 engages. The ring member 16 engages over the projections 16a in the distributed over the circumference of the star head 15 star wells 20. The ring member 16 is cup-shaped and rotatably mounted in a cover 22. The cover 22 with screws 23 forms a conclusion and at the same time an inner pivot bearing 24, the rotary bearing sleeve 24a is held by means of a pin 21 similar to the pin. In Fig. 2A the locked state is shown. In the pivot bearing 24 stores on the one bearing side, a swivel unit 25 rotatably mounted on both sides. The other bearing side lies outside at a fixed point of the hall scaffold. The rotation of the ring element 16 in a circumferential groove 15a of the clamping head 17 by, for example, 30 ° or a multiple of 30 ° prepares the positive connection of the coupling for transmitting the axial clamping force. The rotation of the ring member 16 via the clamping head 17 by means of the pivoting unit 25, if necessary. By hand, if no electrically or hydraulically controllable drive is provided.

In the event that the Hydraulikplunger 10 is relieved, pulls the diaphragm spring column 13 through the clamping piston 14, the star head 15 on the ring member 16 and clamps a head flange of the respective piston-cylinder drive 3 on the fixed side frame 4. A rotation of the clamping piston 14 against the star head 15 in the clamping head 17 is prevented by means of a rotation 26 in the housing 9.

LIST OF REFERENCE NUMBERS

1

terminal unit

2

supporting frame

3

Piston-cylinder drive

3a

piston rod

3b

Rod extension

4

Fixed side frame

4a

Hard side rolls

5

Losseitenrahmen

5a

Losseitenrollen

5b

Spherical plain bearings

6

arrow

7

guide

8th

clutch

9

casing

10

Hydraulikplunger

11

hydraulic connection

11a

Ring collar, clamping surface

11b

vent

12

journal

13

Spring support

14

clamping piston

14a

paragraph

15

star head

15a

circumferential groove

15b

end flange

16

ring element

16a

head Start

17

clamping head

18

opening

19

passage

20

Sternmulde, tooth gap

21

Plunger

22

cover

23

screw

24

pivot bearing

24a

Rotating bearing sleeve

25

swivel unit

26

twist

Claims (5)

1. Device for quick connection or quick release of two large and heavy components (2; 4) for steelworks operation, particularly for a steel continuous casting machine, wherein a hydraulically controlled clamping unit (1) is provided, wherein the clamping force can be generated and set by means of a hydraulic plunger (10) which forms a clamping piston (14) with a central plate spring column (13), wherein the clamping unit (1) comprises a housing (9) connected with the first component (2), characterised in that the clamping piston (14) penetrates the first and second component (2; 4) and carries a clamping head (17) which can be coupled with the clamping piston (14) and which in the connected state is tightened in opposite direction to the first component (2) against the second component (4).
2. Device according to claim 1, characterised in that a star head (15) with detent troughs (20) or tooth gaps (20) is arranged on the end of the clamping piston (14) to be secure against rotation relative thereto and is insertable into an annular element (16) of the clamping head (17), which element is axially fixedly arranged in the clamping head (17) and secures the clamping position of the clamping head (17) relative to the second component (4).
3. Device according to claim 2, characterised in that the annular element (16) of the clamping head (17) slides in a circumferential groove (15a) of the star head (15) and is rotatable by means of an externally arranged pivot unit (25) in circumferential angle relative to correspondingly arranged detent troughs (20) or tooth gaps (20) of the star head (15).
4. Device according to claims 2 and 3, characterised in that the clamping force of the plate spring column (13) is transmissible by way of the star head (15) to the annular element (16) and by way of the clamping head (17) to the second component (4).
5. Device according to claims 2 to 4, characterised in that rotation of the clamping piston (14) in the housing (9) together with the star head (15) in the clamping head (17) is prevented by way of rotational securing means (26).

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