JPH0123226B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in dummy bars for continuous casting equipment.

The dummy bar, which is necessary for the initial operation of continuous casting equipment, connects the mold to the drawing roll device.
This dummy bar is a rod-shaped body with a link structure connected with pins so that it can be bent freely, and after the start of casting, this dummy bar has the role of pulling out and guiding the slab formed in the mold to the drawing roll device, and after separating it from the slab, It is designed to be stored as a single connected body in a storage device installed on the side or above the slab/dummy bar conveying device.

Naturally, the length of this dummy bar becomes longer as the continuous casting equipment becomes larger, but as a result, the storage device for the dummy bar becomes longer, and therefore the slab-cum-dummy bar conveying device has to be made longer than necessary.
A problem arises in that the construction costs of the building and transport equipment inevitably increase.

Figures 1a and 1b are schematic explanatory diagrams of conventional general continuous casting equipment, in which M is a mold, R is a drawing roll device, C is a cutting machine, and H is a slab and dummy bar conveyor. The device, D indicates a dummy bar, and S indicates a slab. Fig. 1a shows the state in which the dummy bar D is supported by the drawing roll device R and the tip is inserted into the bottom opening of the mold M, and Fig. 1b shows the state in which the dummy bar D is separated from the slab S. The state in which they are stored above the transport device H is shown.

The present invention was proposed for the purpose of solving the above-mentioned conventional problems.In a split-type dummy bar for continuous casting equipment constituted by a plurality of connectable dummy bars, the central part of the end face of one dummy bar is A chevron-shaped protrusion is provided protrudingly on the dummy bar, engagement step portions are formed on both sides of the chevron-shaped protrusion, a link is pivotally attached to the center of the end face of the other dummy bar, and the center portion of the pair of lock levers is connected to the link. is pivotally supported on both sides of the distal ends of the pair of lock levers, a stepped portion is formed inside the distal end portions of the pair of lock levers to engage with the stepped portion of the chevron-shaped protrusion, and a compression spring is provided between the rear end portions of the pair of lock levers. This relates to a split-type dummy bar for continuous casting equipment, characterized in that it is loaded with bullets.

The present invention will be specifically explained below with reference to FIGS. 2 to 7, and although the illustrated example shows a case where the dummy bar is divided into two parts,
Needless to say, it may be divided into three or more parts as necessary.

In FIG. 2, 1 is a well-known drawing roll device in continuous casting equipment, 2 is a conveying device (driven roller table) for conveying slabs and dummy bars, and 3
Reference numeral 4 indicates a dummy bar automatic separating device disposed between the drawing roll device 1 and the conveying device 2 as shown in the figure, 4 indicates a dummy bar storage device disposed above the above-mentioned conveying device 2, and 5 and 5' indicate the dummy bar storage device. Two dummy bars stored in upper and lower stages in the device 4 are shown. The dummy bar 5 divided into two pieces,
As shown in FIG. 3, a chevron-shaped protrusion f having an engagement step f' is provided on the rear end surface of the rear end a of the dummy bar 5'. On the other hand, the rear end of a link d is attached to the tip of the dummy bar 5' as shown in the figure, and a pair of bearings e and e' are integrally formed above and below the tip of the link d. b, b' are a pair of lock levers whose center portions are rotatably supported by the bearings e, e' through pins c, c'; A compression spring g is interposed between the parts as shown in the figure, and the elasticity of the compression spring g causes the tips of the lock levers b and b' to always rotate inward around pins c and c'. energized. When the front end of the dummy bar 5' abuts against the rear end a of the dummy bar 5, the pair of lock levers b and b' at the front end of the dummy bar 5' is locked by the chevron-shaped protrusion f on the rear end a of the dummy bar 5. , is pushed open with the pins c and c' as axes against the compression spring g, and the chevron-shaped protrusion f enters between the lock levers b and b'. The inner engaging portion and the stepped portion f' of the chevron-shaped projection f engage with each other, so that the two dummy bars 5 and 5' are integrally connected.
and a mountain-shaped protrusion f on the rear end a of the dummy bar 5.
and a lock lever b at the front end of the dummy bar 5'.
b', link d, bearings e, e', pins c, c', compression spring g, etc., form a means for connecting the two dummy bars 5, 5'.

FIG. 4 shows the detailed structure of the dummy bar automatic disconnection device 3. In the same figure, h is a fluid pressure cylinder fixed to the device frame 3a via a bracket as shown, and i is a fluid pressure cylinder with one end connected to the device frame 3a. a lever fixed to a rotation shaft K which is connected with a pin to the base of the fluid pressure cylinder h and whose other end is rotatably supported by the device frame 3a;
i' has one end connected with a pin to the tip of the rond of the fluid pressure cylinder h, and the other end fixed to a rotating shaft K' rotatably supported on the device frame 3a symmetrically with the rotating shaft K. The levers j, j' are fixed at one end to the rotating shafts K, K', respectively, and have rollers l, j' at the other end.
The levers m and m', which are rotatably supported, have one end fixed to the rotating shafts K and K', and between the other ends, both ends of the connecting rod n are connected with pins. As the rod expands and contracts due to the operation of the cylinder h, the roller l' of the lever j' presses or separates from the lower surface of the dummy bar 5 with a predetermined pressure via the lever i' and the rotating shaft K'. . Also,
As the rotating shaft K' rotates, the rotating shaft K is simultaneously rotated by the same angle in a direction opposite to the rotational direction of the rotating shaft K' through the lever m', the connecting rod n, and the lever m. As the rotation axis K rotates,
Press the roller l against the upper surface of the dummy bar 5 with the same pressure as the roller l' through the levers i and j,
It is also becoming more and more distant from it.

The synchronous pressing of the rollers l and l' against the upper and lower surfaces of the dummy bar is carried out by the extension of the rod of the fluid pressure cylinder h as described above, but in this case, the rolls l and l' are pressed against the upper and lower surfaces of the dummy bar as shown in FIG. The lock levers b and b' at the connecting portion of the two dummy bars 5 and 5' are pressed against the compression spring g to release the engagement relationship between the chevron-shaped protrusion f of the dummy bar 5 and the lock levers b and b'. , a detection signal from an appropriately known detection means (for example, a limit switch) causes the hydraulic cylinder h to
It is now activated. The device frame 3a, the fluid pressure cylinder h, the levers i, i', the rotating shafts K, K', the levers j, j', m, m', the connecting rod n,
The rollers l, l', etc. form an automatic dummy bar separating device 3.

Figures 6 and 7 show the dummy bar storage device 4 installed above the conveyance device (roller table).
The detailed structure of is shown.

In those figures, 6 is a plurality of support legs (two in this example) erected on the foundation, and these support legs 6
A fixed frame z is fixed to each upper end of the frame. w is a rotating shaft rotatably supported by the fixed frame z, one end of a lever v is fixed to the rotating shaft w, and the other end of the lever v is attached to the fixed frame z as shown in FIG. As shown, the tip of the rod of a hydraulic cylinder y whose base is connected with a pin is connected with a pin, and when the rod expands and contracts due to the operation of the hydraulic cylinder y, the lever v rotates about the rotation axis w. It's summery. u is a refraction lever whose refraction part is rotatably pivoted around the rotation axis w, and the tip of one leg _u1 of the refraction lever u is connected to the main beam r. It is connected with a pin on one side, and the tip of the other leg piece _u2 is connected with a pin to the tip of a rod of a hydraulic cylinder x whose base is connected with a pin to the lever v as shown in FIG. s and s are struts that support the main beam r horizontally as shown in FIG. 7 with support members s' interposed between their respective upper ends; , dummy bar support rods t ₁ and t ₂ are respectively provided so as to be located on the same horizontal plane,
Further, a plurality of pairs (5 pairs in this example) of these supports s are provided at regular intervals along the longitudinal direction of the main beam r.

Then, before starting the casting work of the continuous casting equipment,
The two dummy bars 5 and 5', which have been unified in advance at their joints and whose tips are inserted into the mold, are pulled out at a predetermined speed together with the slab by the pulling device 1 after the start of the casting operation. However, the connecting portion of these two dummy bars 5, 5' approaches the dummy bar automatic disconnection device 3, and the front and rear dummy bars 5, 5' are separated at the connecting portion and transferred to the conveying device (drive roller table). 2, the fluid cylinder x operates,
The rod extends and the dummy bar storage device consisting of the support column s, dummy bar support rods t ₁ and t ₂ and the main beam r is raised to a predetermined height via the bending lever U and is placed on the upper dummy bar support rod t ₂ at the rear. The dummy bar 5' is retracted, and then the hydraulic cylinder y is actuated to extend its rod, and the dummy bar storage device is raised to the highest position via the lever v, the hydraulic cylinder x, and the bending lever u, and the lower support rod is moved. The rear dummy bar 5 is stored on _t1 .

One embodiment of the dummy bar device for continuous casting equipment of the present invention is configured as described above, and after the start of the casting operation of the continuous casting equipment, two dummy bars 5, which are connected at the connecting part and integrated, 5' connection is
When the dummy bar automatic separating device 3 is approached through the drawing roll device 1, the hydraulic cylinder h of the separating device 3 is operated in response to a detection signal from a limit switch (not shown), etc., and the rollers l, l' presses the lock levers b, b' against the compression spring g as shown in FIG.
The dummy bar 5' is automatically disconnected at its connection point, and the dummy bar 5' runs on the roller table 2 and is stored on the upper support rod _t2 of the dummy bar storage device. (In this case, the dummy bar storage device is raised to a predetermined position in advance by the operation of the fluid pressure cylinder x.)
Then, the dummy bar storage device is raised to the maximum height position by the operation of the hydraulic cylinder y, and the dummy bar 5 is stored on the lower support rod _t1 .

In addition, in order to unify the dummy bars 5, 5' stored separately into two dummy bars 5, 5' in the dummy bar storage device as described above and to insert the tip into the mold again, the above-mentioned procedure is required. All you have to do is reverse the procedure.

Since the dummy bar device of the present invention has the above-described configuration and function, the dummy bar storage device of the present invention can be significantly shortened compared to the conventional one, and the length of the conveying device can be greatly reduced. In addition to reducing equipment costs for building and conveying equipment, the dummy bar storage device can be placed between the drawing roll device and the slab cutting machine, which reduces pouring preparation time compared to conventional methods. This has the practical effect of reducing the time required.

[Brief explanation of drawings]

Figures 1a and b are schematic side views of general continuous casting equipment, and Figure 1a is an explanatory diagram at the start of casting;
Fig. 1b is an explanatory diagram when the dummy bar is stored, Figs. 2 to 7 are schematic explanatory diagrams of an embodiment of the present invention, Fig. 2 is a side view of the main part, and Fig. 3 is an explanatory diagram of two dummy bars. FIG. 4 is a schematic side view of the dummy bar automatic disconnection device, FIG. 5 is an explanatory diagram of the disconnection state of the connection portion of two dummy bars by the dummy bar automatic disconnection device, and FIG. The figure is a side view of the dummy bar storage device, and FIG. 7 is a view taken in the direction of arrow A in FIG. 6. In FIGS. 2 to 7, 1: Pulling roll device, 2: Conveying device (roller table), 3: Dummy bar automatic separation device, 4:
Dummy bar storage device, 5, 5': dummy bar,
7: Dummy bar connection means.

Claims (1)

[Claims] 1. In a split-type dummy bar for continuous casting equipment constructed of a plurality of connectable dummy bars, a chevron-shaped protrusion is provided protruding in the axial direction at the center of the end face of one dummy bar, and engagement steps are provided on both sides of the chevron-shaped protrusion. a link is pivotally attached to the center of the end face of the other dummy bar, the center portions of a pair of lock levers are pivotally supported on both sides of the tips of the links, and the mountain is attached inside the tips of the pair of lock levers. A split type dummy bar for continuous casting equipment, characterized in that a stepped portion is formed to engage with the stepped portion of the shaped projection, and a compression spring is elastically mounted between the rear end portions of the pair of lock levers.