A kind of arc starting structure of dummy rod and its working method

Abstract

The present invention relates to the field of continuous casting technology, and in particular to an arc-starting structure of an ingot-starting rod and a working method thereof. The ingot-starting rod is formed by connecting a plurality of groups of arc-starting structural units, and the arc-starting structural unit includes a rod body and a transition section. The rod body includes two identical plates, which are overlapped and aligned, and are fixedly connected in the center by a connecting column, and two fixing holes are respectively provided on both sides of the plate; the transition section is a transition plate, and the transition plate has a fixing hole and an arc-starting hole respectively provided from the middle to both ends; the aperture of the arc-starting hole is larger than the fixing hole, and the aperture of the fixing holes on the rod body and the transition section is the same; the fixing hole in the middle of the rod body is connected to the fixing hole on the transition section through a fixed shaft; the fixing holes at both ends of the rod body are connected to the arc-starting hole on the transition section through an arc-starting shaft; a plurality of groups of arc-starting structural units are connected according to the above-mentioned connection method, and one end thereof is connected to the ingot-starting head shaft. The present invention uses a fixed shaft to limit and prevent lateral bending, and the arc-starting shaft is used to start the arc without bending downward.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting, and in particular to an arc starting structure of a dummy rod and a working method thereof. Background Art

[0002] In the traditional chain dummy rod, the rod body of the traditional chain dummy rod is composed of dozens of chain links, and the connection between the dummy head and the chain links, and between the chain links are all connected by pins or bolts. In use, the main working direction is to bend upward as a whole, and finally form a 1 / 4 arc to reach the working state. However, this structure needs to play the role of arc starting in a certain operating section due to the machine model, and the total length needs to be within 30 meters due to the machine model. During work, due to the change of arc and the influence of length, bending and deflection, left and right side bending often occur, which will seriously affect the online use and the forming quality of the billet. Summary of the invention

[0003] In order to solve the above technical problems, the present invention discloses and a working method thereof.

[0004] The specific technical solutions are as follows:

[0005] A dummy rod arc-starting structure, the dummy rod is formed by connecting multiple groups of arc-starting structural units, the arc-starting structural units include a rod body and a transition section, the rod body includes two identical plates, the two plates are overlapped and aligned, and are fixedly connected in the center by a connecting column, and two fixing holes are respectively provided on both sides of the plates; the transition section is a transition plate, and the transition plate is respectively provided with a fixing hole and an arc-starting hole from the middle to both ends; the aperture of the arc-starting hole is larger than the fixing hole, and the aperture of the fixing holes on the rod body and the transition section is the same; the fixing hole in the middle of the rod body is connected to the arc-starting hole on the transition section through an arc-starting shaft; the fixing holes at both ends of the rod body are connected to the fixing holes on the transition section through a fixing shaft; multiple groups of arc-starting structural units are connected according to the above connection method, and one end of each end is connected to the dummy head shaft.

[0006] The plate is in a rectangular shape as a whole, and the bottom edge at the bottom is processed into a slightly arc shape.

[0007] The diameter of the arc starting hole is 5 / 3 times the diameter of the fixed hole.

[0008] The arc starting hole 6 is an elliptical hole, the axis of which is eccentrically arranged with respect to the center of the fixing hole 5 of the transition plate, and the long axis direction is arranged along the longitudinal direction of the transition plate.

[0009] The fixed shaft and the arc-starting shaft can be fixedly installed by riveting, or can be detachably installed by screws and bolts.

[0010] The longitudinal downward eccentricity of the axial transition plate of the arc starting hole is 3.5-4.5 mm.

[0011] A working method of an arc-starting structure of a dummy rod, wherein a fixed shaft connects fixed holes at both ends of a rod body and fixed holes on a transition section, an arc-starting shaft connects fixed holes in the middle of the rod body and an arc-starting hole on the transition section, the aperture of the arc-starting hole is larger than the fixed hole, and arc-starting is completed when the arc-starting shaft abuts against the bottom of the larger arc-starting hole; multiple groups of arc-starting structural units are accumulated together to form a dummy rod that is bent upward into a 1 / 4 arc as a whole, thus reaching a working state.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] (1) The arc-starting structural unit of the present invention includes a rod body and a transition section. The rod body includes two identical plates, which are overlapped and aligned and fixedly connected in the center by a connecting column. Two fixing holes are provided on both sides of the plates. The transition section is a transition plate, which has a fixing hole and an arc-starting hole respectively from the middle to both ends. The aperture of the arc-starting hole is larger than the fixing hole, and the aperture of the fixing holes on the rod body and the transition section is the same. The fixing hole in the middle of the rod body is connected to the fixing hole on the transition section through a fixing shaft. The fixing holes at both ends of the rod body are connected to the arc-starting hole on the transition section through an arc-starting shaft. The arc-starting purpose is achieved by two shafts with different functions, wherein the fixing shaft is used to limit and prevent lateral bending. The arc-starting hole is an elliptical hole, the axis is eccentrically arranged with the center of the fixing hole of the transition plate, and the long axis is arranged along the longitudinal direction of the transition plate. The arc-starting shaft is used to start the arc and prevent deflection.

[0014] (2) The plate of the rod body of the present invention is in the shape of a rectangle as a whole, and the bottom edge near the lower part is processed into a slightly arc-shaped shape, which can ensure that when the dummy rod bends upward at the start of the arc, the whole is rounded without any overly protruding structure, so as to prevent the smoothness of the arc from being affected.

[0015] (3) The fixed shaft and the arc-starting shaft of the present invention can be riveted and fixed, or can be removably installed with screws and bolts. Riveted fixed installation has a stable overall connection, and screw-bolt removable installation is convenient for maintenance and replacement, which can be selected according to actual needs on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a traditional chain dummy bar;

[0017] Figure 2 It is an overall schematic diagram of the arc starting structure of the dummy bar of the present invention;

[0018] Figure 3 It is a partially enlarged schematic diagram of the arc starting structure unit of the present invention;

[0019] Figure 4 It is a partially enlarged three-dimensional structural schematic diagram of the arc starting structural unit of the present invention;

[0020] Figure 5 It is a partially enlarged top view of the arc starting structure unit of the present invention;

[0021] Figure 6 It is a schematic diagram of the connection between the arc starting structure unit shaft and the transition section of the present invention;

[0022] Figure 7 Schematic diagram of arc starting of the arc starting structural unit of the present invention;

[0023] Figure 8 This is the overall effect diagram of the arc starting structure of the dummy bar after use.

[0024] In the figure, 1 is the rod body; 2 is the transition section; 3 is the fixed shaft; 4 is the arc starting shaft; 5 is the fixed hole; 6 is the arc starting hole; 7 is the straightening roller; 8 is the stripping roller; 9 is the ingot starter; 10 is the crystallizer; 11 is the ladle; 12 is the chain link; 13 is the pin shaft; 14 is the connecting column. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the accompanying drawings.

[0026] Figure 1 The schematic diagram of the structure of the conventional chain dummy bar is shown in the figure. As shown in the figure, the rod body of the conventional chain dummy bar is composed of dozens of chain links 12. The connection between the dummy head and the chain links, and between the chain links, are all hinged or bolted by pins 13.

[0027] Figure 2 This is an overall schematic diagram of the arc starting structure of the dummy bar of the present invention. Figure 3 It is a partial enlarged schematic diagram of the arc starting structure unit of the present invention, Figure 4 It is a partially enlarged three-dimensional structural schematic diagram of the arc starting structure unit of the present invention, Figure 5 It is a partially enlarged top view of the arc starting structure unit of the present invention. Figure 6 This is a schematic diagram of the connection between the arc starting structure unit shaft and the transition section of the present invention, as shown in the figure:

[0028] A dummy rod arc-starting structure, the dummy rod is formed by connecting multiple groups of arc-starting structural units, the arc-starting structural units include a rod body 1 and a transition section 2, the rod body includes two identical plates, the two plates are overlapped and aligned, and are fixedly connected in the center by a connecting column 14, and two fixing holes 5 are respectively provided on both sides of the plates; the transition section 2 is a transition plate, and the transition plate is respectively provided with a fixing hole 5 and an arc-starting hole 6 from the middle to both ends; the aperture of the arc-starting hole 6 is larger than the fixing hole 5, and the aperture of the fixing holes 5 on the rod body 1 and the transition section 2 is the same; the fixing hole in the middle of the rod body 1 is connected to the arc-starting hole 6 on the transition section 2 through an arc-starting shaft 4; the fixing holes at both ends of the rod body 1 are connected to the fixing holes on the transition section 2 through a fixing shaft; multiple groups of arc-starting structural units are connected according to the above connection method, and one end of each of them is connected to the dummy head 9 axis.

[0029] The plate is in a rectangular shape as a whole, and the bottom edge at the bottom is processed into a slightly arc shape.

[0030] The arc starting hole 6 is an elliptical hole, the axis of which is eccentrically arranged with respect to the center of the fixing hole 5 of the transition plate, and the long axis direction is arranged along the longitudinal direction of the transition plate.

[0031] The longitudinal downward eccentricity of the axial transition plate of the arc starting hole is 3.5-4.5 mm.

[0032] The fixed shaft and the arc-starting shaft can be fixedly installed by riveting, or can be detachably installed by screws and bolts. Figure 7 Schematic diagram of arc starting of the arc starting structural unit of the present invention, Figure 8 This is the overall effect diagram of the arc-starting structure of the dart bar of the present invention after use. As shown in the figure, when working, the fixed shaft 3 is used to connect the fixed holes at both ends of the rod body 1 and the fixed holes on the transition section 2. The arc-starting shaft 4 is used to connect the fixed hole in the middle of the rod body 1 and the arc-starting hole 6 on the transition section 2. Since the aperture of the arc-starting hole 6 is larger than the fixed hole 5, when the arc-starting shaft 4 is against the bottom of the larger arc-starting hole 6, the arc can be started. Multiple groups of arc-starting structural units are accumulated together to form the dart bar as a whole, which is bent upward into a 1 / 4 arc and reaches the working state.

Claims

1. A dummy bar arc starting structure, characterized in that: The ingot-starting rod is connected by a plurality of groups of arc-starting structural units, and the arc-starting structural units include a rod body and a transition section, the rod body includes two identical plates, the two plates are overlapped and aligned, and are fixedly connected in the center by a connecting column, and two fixing holes are respectively provided on both sides of the plates; the transition section is a transition plate, and the transition plate respectively has a fixing hole and an arc-starting hole from the middle to both ends; the aperture of the arc-starting hole is larger than the fixing hole, and the aperture of the fixing holes on the rod body and the transition section is the same; the fixing hole in the middle of the rod body is connected to the arc-starting hole on the transition section through an arc-starting shaft; the fixing holes at both ends of the rod body are connected to the fixing holes on the transition section through a fixing shaft; a plurality of groups of arc-starting structural units are connected according to the above-mentioned connection method, and one end thereof is connected to the ingot-starting head shaft.

2. The arc starting structure of the dummy bar according to claim 1, characterized in that: The plate is in a rectangular shape as a whole, and the bottom edge at the bottom is processed into a slightly arc shape.

3. The arc starting structure of the dummy bar according to claim 1, characterized in that: The minor axis length of the arc starting hole is 5 / 3 times the diameter of the fixed hole.

4. The arc starting structure of the dummy bar according to claim 1, characterized in that: The arc starting hole is an elliptical hole, the axis of which is eccentrically arranged with respect to the center of the fixing hole of the transition plate, and the long axis direction is arranged along the longitudinal direction of the transition plate.

5. The arc starting structure of the dummy bar according to claim 1, characterized in that: The fixed shaft and the arc-starting shaft can be fixedly installed by riveting, or can be detachably installed by screws and bolts.

6. The arc starting structure of the dummy bar according to claim 4, characterized in that: The longitudinal downward eccentricity of the axial transition plate of the arc starting hole is 3.5-4.5 mm.

7. A method for operating the dummy bar arc starting structure according to claim 1, characterized in that: The fixed shaft connects the fixed holes at both ends of the rod body and the fixed holes on the transition section, the arc starting shaft connects the fixed hole in the middle of the rod body and the arc starting hole on the transition section, the aperture of the arc starting hole is larger than the fixed hole, and the arc starting is completed when the arc starting shaft rests against the bottom of the larger arc starting hole; multiple groups of arc starting structural units are accumulated together to form the ingot guide rod, which is bent upward into a 1 / 4 arc as a whole to reach a working state.

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