CN216540757U - Improved dummy bar head for continuous casting of square billet - Google Patents
Improved dummy bar head for continuous casting of square billet Download PDFInfo
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- CN216540757U CN216540757U CN202122503181.8U CN202122503181U CN216540757U CN 216540757 U CN216540757 U CN 216540757U CN 202122503181 U CN202122503181 U CN 202122503181U CN 216540757 U CN216540757 U CN 216540757U
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Abstract
The utility model relates to an improved square billet continuous casting dummy bar head, which comprises a dummy bar head body, wherein the tail part of the dummy bar head body is provided with a through dovetail groove from the bottom surface to the top surface, and the improvement is as follows: the bottom surface of the dummy bar head body is provided with a groove which is communicated with the width of the dummy bar head body towards the top surface, the front end surface of the dummy bar head body is provided with a baffle plate, a screw hole is formed backwards along the front end surface of the dummy bar head body and communicated with the groove, and a screw rod penetrates through the baffle plate and the screw hole and is fixed in the groove. The utility model can effectively prevent the casting blank from being separated from the dummy bar head in advance before entering the withdrawal and straightening machine during production, thereby avoiding the serious production accident of horizontal blank or steel leakage and avoiding the burning loss of high-temperature molten steel to the dummy bar head body.
Description
Technical Field
The utility model relates to an improved square billet continuous casting dummy bar head, belonging to the technical field of continuous casting equipment in the metallurgical industry.
Background
In the steelmaking production of metallurgical enterprises, a dummy bar head at the upper end of a dummy bar rod is extended into 1/4 parts in a crystallizer before casting in the continuous casting of square billets, and the dummy bar head is used as a 'movable bottom' of the crystallizer to block the lower opening of the crystallizer; after casting, the end part of the casting blank and the dummy bar head are condensed into a whole along with the solidification of the molten steel injected into the crystallizer, and the casting blank is continuously pulled out from the lower opening of the crystallizer along with the dummy bar and the dummy bar head through the traction of the dummy bar and the dummy bar head until the casting blank passes through a withdrawal and straightening machine and is unhooked from the dummy bar and the dummy bar head. The currently used dummy bar head is of a wedge-shaped structure, and the head and the bottom of the dovetail groove are arc surfaces, so that although the blank is convenient to strip, when the blank is shaken due to resistance or other factors in actual production, the blank is easily separated from the dummy bar head in advance in a secondary cooling chamber before entering a withdrawal and straightening machine, and a malignant shutdown production accident that the blank lies in a crystallizer or leaks steel is caused, wherein the accident occurs during production, and the normal production of a continuous casting machine is seriously influenced; and secondly, the contact and solidification of the dummy bar head and high-temperature molten steel can burn the dummy bar head. After the blank is taken off, the dummy bar head is cooled to normal temperature, the dummy bar head works in an environment with large temperature difference, the dummy bar head can generate cracks, and the service life is only about 6 months.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an improved dummy bar head for continuous casting of square billets, which can effectively prevent a casting blank from being separated from the dummy bar head before entering a withdrawal and straightening machine and greatly prolong the service life of the dummy bar head.
The technical scheme for solving the technical problems is as follows:
the utility model provides an improved square billet continuous casting dummy bar head, includes the dummy bar head body, and the dummy bar head body afterbody is opened from the bottom surface to the top surface has the dovetail that link up, and its improvement is: the bottom surface of the dummy bar head body is provided with a groove which is communicated with the width of the dummy bar head body towards the top surface, the front end surface of the dummy bar head body is provided with a baffle plate, a screw hole is formed backwards along the front end surface of the dummy bar head body and communicated with the groove, and a screw rod penetrates through the baffle plate and the screw hole and is fixed in the groove.
In the improved square billet continuous casting dummy bar head, the groove is formed in the front half part of the dummy bar head body, and the front end of the screw rod is bent upwards to form an L shape.
The improved continuous casting dummy bar head for the square billet comprises a dummy bar head body, wherein the front end of the dummy bar head body inclines towards the lower right to form an inclined plane, the front end of the groove inclines towards the lower left to form an inclined plane, the inclined plane at the front end of the dummy bar head body and the inclined plane at the front end of the groove enable the front part of the dummy bar head body to form a reverse cone with a wide top and a narrow bottom, the reverse cone is provided with a pin hole penetrating through the width of the dummy bar head body, and a pin shaft is installed and located below a screw rod.
The improved square billet continuous casting dummy bar head also comprises an asbestos pad, wherein the asbestos pad is arranged between the baffle plate and the inclined plane at the front end of the dummy bar head body; the outer side surface of the baffle is fixed through a nut arranged on the screw rod, and the tail part of the screw rod is fixed in the groove through the nut.
The improved continuous casting dummy bar head for the square billets is characterized in that the included angles between the inclined plane at the front end of the dummy bar head body and the inclined plane at the front end of the groove and the vertical line are acute angles, the pin shaft is of a hollow structure, and the pin shaft is perpendicular to the screw rod and is infinitely close to the screw rod.
The screw rod of the utility model is combined with the dummy bar head body into a whole, and the working process is as follows: after molten steel is poured, the molten steel poured into the crystallizer and the L-shaped screw at the front end of the dummy bar head body are solidified into a whole, the baffle and the asbestos pad at the front end of the dummy bar head body can separate the high-temperature molten steel from the dummy bar head body, the burning loss of the high-temperature molten steel to the dummy bar head body can be avoided, the service condition of the dummy bar head is improved, and the service life can reach more than 12 months; when the casting blank is pulled out of the withdrawal and straightening machine, the casting blank is pressed by the knockout roll to move downwards, and the casting blank and the dummy bar head can be smoothly separated by the inverted cone at the front part of the dummy bar head body; the added disposable anti-falling pin shaft can prevent the L-shaped screw from sliding downwards, and can prevent the situation that a casting blank is separated from the dummy bar head before entering the withdrawal and straightening machine due to the shaking of the casting blank, so that the serious shutdown accident of horizontal blank or steel leakage is avoided; the problems existing in the background technology are solved, and the smooth production of the continuous casting machine is ensured.
The utility model has the beneficial effects that:
the utility model can effectively prevent the casting blank from being separated from the dummy bar head in advance before entering the tension leveler during production, avoid the malignant production accident of horizontal blank or steel leakage, avoid the burning loss of high-temperature molten steel to the dummy bar head body and prolong the service life of the dummy bar head to more than 12 months; the device is convenient to install and use, and ensures the normal production of the billet continuous casting machine.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
labeled as: dovetail 1, recess 2, baffle 3, screw rod 4, back taper 5, pinhole 6, asbestos pad 7.
Detailed Description
The utility model is further illustrated by way of example in the following with reference to the accompanying drawings.
Referring to fig. 1-2, the utility model relates to an improved square billet continuous casting dummy bar head, which comprises a dummy bar head body; FIG. 1 shows that the whole dummy bar head body is of an approximate cuboid structure, and a through dovetail groove 1 is formed in the tail part of the dummy bar head body from the bottom surface to the top surface, and the dovetail groove structure is of an existing structure; fig. 1 and 2 show that a groove 2 penetrating the width of the dummy bar head body is formed along the bottom surface to the top surface of the dummy bar head body in the front half part of the dummy bar head body, and fig. 2 shows that the depth of the groove 2 exceeds 1/2 of the height of the dummy bar head body;
FIG. 2 shows that the front end face of the dummy bar head body is an inclined plane, the inclined plane is inclined from the top of the dummy bar head body to the lower right, and the included angle between the inclined plane and the vertical line is an acute angle after the inclined plane is inclined; the front end surface of the groove 2 is also an inclined surface, the inclined surface inclines from the top of the groove 2 to the lower left, and the included angle between the inclined surface and the vertical line is also an acute angle after the inclined surface is inclined; the front part of the dummy bar head body forms an inverted cone 5 with a wide upper part and a narrow lower part by the inclined plane at the front end of the dummy bar head body and the inclined plane at the front end of the groove;
fig. 1 and 2 show that a baffle plate 3 and an asbestos pad 7 are arranged on the front end inclined plane of the dummy bar head body, and holes are formed in the baffle plate 3 and the asbestos pad 7; a screw hole is formed backwards along the inclined plane of the front end of the dummy bar head body and is communicated with the groove 2, the screw rod 4 penetrates through the baffle plate 3, the asbestos pad 7 and the screw hole, the outer side surface of the baffle plate 3 is fixed through a nut arranged on the screw rod 4, and the tail part of the screw rod 4 is fixed in the groove 2 through the nut; the inverted cone 5 at the front part of the dummy bar head body is provided with a pin hole 6 penetrating through the width of the dummy bar head body, a pin shaft is arranged in the pin hole, the pin shaft is vertical to the screw rod 4, and the pin shaft is positioned below the screw rod 4 and is infinitely close to the screw rod 4.
Fig. 1 and 2 show that the front end of the screw rod 4 is bent upwards into an L shape, and the bending angle is 90 degrees, so that the blank drawing is facilitated.
In this embodiment, the pin shaft is a hollow structure, and the purpose is to facilitate the knockout.
The specific production process comprises the following steps:
after a dummy bar and a dummy bar head body pass through a withdrawal and straightening machine during production preparation, firstly, an L-shaped screw rod 4, a baffle plate 3 and an asbestos pad 7 are fixedly arranged on the dummy bar head body, then a disposable pin shaft made of a thin steel pipe is arranged in a pin hole 6 to prevent the L-shaped screw rod 4 from sliding downwards, and finally, the dummy bar head body at the upper end of the dummy bar is stretched into a position 1/4 in a crystallizer to be used as a crystallizer 'movable bottom' to block a lower opening of the crystallizer;
during production, along with solidification of molten steel injected into the crystallizer and the L-shaped screw rod 4 on the dummy bar head body, through traction of the dummy bar and the dummy bar head body, a casting blank is continuously pulled out from a lower opening of the crystallizer along with the dummy bar and the dummy bar head body until the casting blank passes through a withdrawal and straightening machine and is unhooked from the dummy bar and the dummy bar head body; the front end of the L-shaped screw rod 4 is bent to form a 90-degree hook, so that the reliability of connection between the dummy bar head body and the casting blank is guaranteed, and production accidents caused by the fact that the casting blank is separated from the front of the tension leveler are avoided.
When molten steel in a crystallizer is solidified with the dummy bar head body into a whole during production, the baffle 3 and the asbestos pad 7 in front of the dummy bar head body separate the high-temperature molten steel from the dummy bar head body, so that the cracking or burning loss phenomenon of the dummy bar head caused by the direct contact of the dummy bar head body and the high-temperature molten steel is avoided.
In the production process, once the casting blank shakes up and down due to resistance or other factors on the drawing, if the L-shaped screw 4 fixed on the dummy bar body displaces downwards, the pin shaft almost contacted with the lower surface of the L-shaped screw can prevent the screw 4 from moving downwards, so that the casting blank is prevented from being separated from the dummy bar head in advance in a secondary cooling chamber before entering a withdrawal and straightening machine, and the production accident of malignant shutdown that the casting blank lies in a crystallizer or leaks steel is avoided.
The front lower half part of the ingot head body is cut into a reverse cone 5 with a wide upper part and a narrow lower part by the front end inclined plane in the dummy ingot head body and the groove 2, a blank removing roller presses a casting blank to move downwards under the pushing of a hydraulic cylinder when the casting blank is pulled out of a withdrawal and straightening machine in the production process to crush a pin shaft, the casting blank and the dummy ingot head are conveniently and smoothly separated, and after the L-shaped screw rod 4 and the baffle 3 enter a next procedure along with the casting blank, the baffle 3 can be detached and recycled, so that the purchase cost of spare parts is saved.
Claims (5)
1. The utility model provides a modified square billet continuous casting dummy bar head, includes dummy bar head body, and dummy bar head body afterbody is opened by the bottom surface to the top surface has dovetail (1) that link up, its characterized in that: a groove (2) which runs through the width of the dummy bar head body is formed in the bottom surface of the dummy bar head body towards the top surface, a baffle plate (3) is arranged on the front end surface of the dummy bar head body, a screw hole is formed backwards along the front end surface of the dummy bar head body and runs through the groove (2), and a screw rod (4) penetrates through the baffle plate (3) and the screw hole and is fixed in the groove (2).
2. An improved billet continuous casting dummy bar as set forth in claim 1, wherein: the groove (2) is arranged on the front half part of the dummy bar head body, and the front end of the screw rod (4) is bent upwards to form an L shape.
3. An improved billet continuous casting dummy bar as set forth in claim 1, wherein: the front end of the dummy bar head body inclines towards the lower right to form an inclined plane, the front end of the groove (2) inclines towards the lower left to form an inclined plane, the inclined plane at the front end of the dummy bar head body and the inclined plane at the front end of the groove (2) enable the front part of the dummy bar head body to form an inverted cone (5) with a wide top and a narrow bottom, a pin hole (6) penetrating through the width of the dummy bar head body is formed in the inverted cone (5), and a pin shaft is installed and located below the screw (4).
4. An improved billet continuous casting dummy bar as set forth in claim 1, wherein: the flyer frame is characterized by further comprising an asbestos pad (7), wherein the asbestos pad (7) is arranged between the baffle (3) and the inclined plane at the front end of the dummy bar head body; the outer side surface of the baffle (3) is fixed through a nut arranged on the screw rod (4), and the tail part of the screw rod (4) is fixed in the groove (2) through the nut.
5. An improved billet continuous casting dummy bar as set forth in claim 3, wherein: the angle between the inclined plane at the front end of the dummy bar head body and the inclined plane at the front end of the groove (2) and the vertical line is an acute angle, the pin shaft is of a hollow structure, and the pin shaft is perpendicular to the screw rod (4) and is infinitely close to the screw rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122503181.8U CN216540757U (en) | 2021-10-18 | 2021-10-18 | Improved dummy bar head for continuous casting of square billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122503181.8U CN216540757U (en) | 2021-10-18 | 2021-10-18 | Improved dummy bar head for continuous casting of square billet |
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| CN216540757U true CN216540757U (en) | 2022-05-17 |
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| CN202122503181.8U Active CN216540757U (en) | 2021-10-18 | 2021-10-18 | Improved dummy bar head for continuous casting of square billet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117380916A (en) * | 2023-12-08 | 2024-01-12 | 成都利华强磁浮连铸科技有限责任公司 | Magnetic suspension continuous casting system and magnetic suspension continuous casting method |
-
2021
- 2021-10-18 CN CN202122503181.8U patent/CN216540757U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117380916A (en) * | 2023-12-08 | 2024-01-12 | 成都利华强磁浮连铸科技有限责任公司 | Magnetic suspension continuous casting system and magnetic suspension continuous casting method |
| CN117380916B (en) * | 2023-12-08 | 2024-02-23 | 成都利华强磁浮连铸科技有限责任公司 | Magnetic suspension continuous casting system and magnetic suspension continuous casting method |
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