CN112975835B - Slab continuous casting machine sector section opening device and method for dismantling pin shaft - Google Patents
Slab continuous casting machine sector section opening device and method for dismantling pin shaft Download PDFInfo
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- CN112975835B CN112975835B CN202110154653.5A CN202110154653A CN112975835B CN 112975835 B CN112975835 B CN 112975835B CN 202110154653 A CN202110154653 A CN 202110154653A CN 112975835 B CN112975835 B CN 112975835B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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Abstract
The invention discloses a fan-shaped section opening device of a slab continuous casting machine and a method for dismantling a pin shaft, belonging to the field of maintenance of spare parts of continuous casting machines and aiming at improving maintenance efficiency. Comprises a screw rod, a jack for erecting a jack and a connecting nut fixed on a pin shaft; the connecting nut is coaxially welded to the outer end face of the pin shaft; the jacking tool is provided with a through hole; the inner end of the screw rod is in threaded fit connection with the connecting nut, and the outer end of the screw rod penetrates through a through hole in the ejector tool and is movably connected with the ejector tool along the axial direction of the ejector tool; a limiting device is arranged between the screw rod and the ejector, and the ejector is detachably connected to the screw rod through the limiting device. According to the invention, the connection between the connecting nut and the pin shaft is more reliable. The connecting nut is not required to be removed after maintenance, and the damage risk caused by repeated welding of the pin shaft is reduced. The screw rod is connected with the ejector and the connecting nut, so that the assembly and disassembly are quick, and the ejector can be repeatedly used. When the pin shaft is removed, the removal qualification rate reaches 99 percent, and the removal of one pin shaft is within 30-40 minutes, so that the maintenance efficiency is improved.
Description
Technical Field
The invention belongs to the field of maintenance of spare parts of continuous casting machines, and particularly relates to a fan-shaped section opening device of a slab continuous casting machine and a method for dismantling a pin shaft.
Background
The inner and outer arcs of the spare parts of the slab sector section are disassembled, and the spare parts are called sector section opening for short. The conventional method for dismantling the pin shaft in the open section comprises the following steps: and after the welding is finished, the distance between the T-shaped steel plate support and the slab caster fan-shaped section shell forms a jack installation area, a jack is respectively erected in the jack installation areas on two sides of the T-shaped steel plate support, one end of the jack is abutted against the slab caster fan-shaped section shell, the other end is abutted against the T-shaped steel plate support, and the slab caster fan-shaped section shell is taken as a force application fulcrum to eject the pin shaft. This approach has the following problems:
the method comprises the following steps: and steel plates are required to be used for blanking before the pin shaft is removed, T-shaped steel plates are welded on the pin shaft, the T-shaped steel plates are required to be cut off after the pin shaft is ejected out, and the workload is high. And (3) a series of processes from the beginning of blanking to the completion of cutting off the T-shaped steel plate are completed, and the dismantling of one pin roll is about 4 hours.
And two,: the steps are repeated during the next maintenance, the pin shaft is required to be welded repeatedly, the pin shaft is damaged, spare parts of the pin shaft are required to be reprocessed, and the maintenance cost is increased.
And thirdly,: in the actual pin shaft dismantling construction process, part of the fan-shaped section pin shaft is tightly matched with the pin hole, so that the welding seam of the T-shaped steel plate and the pin shaft is broken. The pin shaft cannot be taken out and needs to be reworked.
Disclosure of Invention
The invention aims to solve the problem of low efficiency when the existing segment opening device is used for maintaining the slab caster sector segment, and provides the slab caster sector segment opening device and the method for dismantling the pin shaft, which are rapid in disassembly and assembly and high in maintenance efficiency.
The technical scheme adopted by the invention is as follows: the slab caster sector section opening device comprises a bracket forming a jack installation area with a slab caster sector section shell, wherein the bracket comprises a screw rod, a jack for erecting a jack and a connecting nut fixed on a pin shaft; the connecting nut is coaxially welded to the outer end face of the pin shaft; the jacking tool is provided with a through hole; the inner end of the screw rod is in threaded fit connection with the connecting nut, and the outer end of the screw rod penetrates through a through hole in the ejector tool and is movably connected with the ejector tool along the axial direction of the ejector tool; a limiting device is arranged between the screw rod and the ejector, and the ejector is detachably connected to the screw rod through the limiting device.
Further, the top tool comprises a top plate and side plates on two sides of the top plate, the top plate and the side plates are surrounded to form a groove structure with an opening facing outwards, and the through holes are formed in the top plate.
Further, a reinforcing rib is arranged between the top plate and the side plate, and the reinforcing rib is positioned in a groove-shaped area formed by surrounding the top plate and the side plate.
Further, the limiting device comprises a backing plate and a lock nut; the backing plate is abutted against the ejector through the screw rod by the outer end of the screw rod, the locking nut is in threaded fit connection with the screw rod, and the backing plate is positioned between the ejector and the locking nut.
Further, the top tool comprises a top plate and side plates at two sides of the top plate, a groove structure with an outward opening is formed by surrounding the top plate and the side plates, and the through hole is formed in the top plate;
the backing plate comprises a square backing plate and a round backing plate, the square backing plate is located between the round backing plate and the top plate, and the square backing plate passes through the screw rod to abut against the side plate.
A method for dismantling a pin shaft from a fan-shaped section of a slab caster,
welding a connecting nut on the outer end face of a pin shaft, wherein the connecting nut is coaxial with the pin shaft and has an outer diameter smaller than that of the pin shaft; the inner end of the screw rod is in threaded connection with the connecting nut, and the outer end sequentially penetrates through the through hole of the ejector, the backing plate and the locking nut to be in threaded connection;
adjusting the position of the lock nut on the screw rod to enable the space between the inner side surface of the jacking tool and the shell of the fan-shaped section of the slab caster to be matched with the installation size of the jack;
step three, a jack is arranged between the inner side surface of the jacking tool and the shell of the fan-shaped section of the slab caster, and the jack is erected on the jacking tool after the jack is adjusted to be in place;
step four, the jack stretches, and the pin shaft is ejected out;
and fifthly, removing the jack and the screw rod, and retaining the connecting nut on the pin shaft.
In the second step, the distance between the inner side surface of the ejector and the slab caster sector is D, and the height of the jack is H; D-H is less than or equal to 30mm and less than or equal to 50mm.
The beneficial effects of the invention are as follows: according to the invention, the connecting nut is welded on the pin shaft as the connecting piece, the welding seam between the connecting nut and the pin shaft is in a closed ring shape, the welding seam strength is higher, the connection between the connecting nut and the pin shaft is more reliable, the risk of reworking caused by the breakage of the welding seam is reduced, and the overhaul efficiency is improved. After the pin shaft is ejected, only the ejector is required to be removed, the connecting nut is not required to be removed, and the connecting nut can be continuously put into use when overhauling next time, so that the number of times of repeated welding operation on the pin shaft is reduced, and the damage risk of the pin shaft is reduced. Meanwhile, the disassembly and repeated welding procedures of the connecting nut are saved, the overhaul time is shortened, and the overhaul efficiency is improved. The jacking tool is connected with the connecting nut by adopting the screw rod, so that the assembly and disassembly are quick and convenient, the damage of welding to the jacking tool is avoided, and the repeated use of the jacking tool is facilitated. The screw rod passes through the through hole on the jack, and the position of the jack along the axial direction of the screw rod is limited through the limiting device, so that the position of the jack along the axial direction of the screw rod can be adjusted, the jack can be suitable for jacks with various specifications, and the jack is more convenient to install.
When the slab continuous casting machine fan-shaped section opening device is used for dismantling the pin shafts, the qualification rate of the dismantling of the pin shafts is over 99 percent, the time for dismantling one pin shaft is within 30-40 minutes, and the overhaul efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of a slab caster segment opening apparatus using the disclosed invention;
fig. 2 is a schematic diagram of the structure of the jack.
In the figure, a pin shaft 1, a connecting nut 2, a jacking tool 3, a top plate 3A, a side plate 3B, a reinforcing rib 3C, a through hole 3D, a screw rod 4, a base plate 5, a square base plate 5A, a round base plate 5B, a locking nut 6 and a jack 7.
Detailed Description
The invention is further illustrated in the following figures and examples, in which:
the slab caster sector section opening device comprises a bracket forming a jack installation area with a slab caster sector section shell, as shown in fig. 1, wherein the bracket comprises a screw rod 4, a jack 3 for erecting a jack 7 and a connecting nut 2 fixed on a pin shaft 1; the connecting nut 2 is coaxially welded to the outer end face of the pin shaft 1; the jacking tool 3 is provided with a through hole 3D; the inner end of the screw rod 4 is in threaded fit connection with the connecting nut 2, and the outer end of the screw rod passes through a through hole 3D on the jacking tool 3 and is movably connected with the jacking tool 3 along the axial direction of the jacking tool; a limiting device is arranged between the screw rod 4 and the jacking device 3, and the jacking device 3 is detachably connected to the screw rod 4 through the limiting device.
According to the invention, the connecting nut 2 is welded on the outer end face of the pin shaft 1 as a connecting piece, and firstly, the welding seam between the connecting nut 2 and the pin shaft 1 is in a closed ring shape, so that compared with the traditional welding seam formed by welding a T-shaped ejector on the pin shaft 1, the welding seam strength is higher, the connection between the connecting nut 2 and the pin shaft 1 is more reliable, the risk of reworking caused by the breakage of the welding seam is reduced, and the overhaul efficiency is improved. The connecting nut 2 is welded to the outer end face of the pin shaft 1, not welded to the outer circumferential face of the pin shaft 1, and the assembly face of the pin shaft 1 is not damaged.
The connecting nut 2 is coaxially welded on the outer end face of the pin shaft 1, and the central axis of the connecting nut 2 is coincident with the central axis of the pin shaft 1, so that the stress balance can be ensured, and the pin shaft 1 can be conveniently and smoothly ejected under the action of the jacking forces of the two jacks 7 at two sides.
The outer end face of the pin shaft 1 refers to an end face which is exposed out of the pin hole and perpendicular to the axis after the pin shaft 1 is assembled to the pin hole.
Secondly, the connecting nut 2 only plays a role in assembling the ejector 3 and the pin shaft 1 together, after the pin shaft 1 is ejected, the ejector 3 is only required to be removed, the connecting nut 2 is not required to be removed, and when overhauling next time, the connecting nut 2 can be continuously put into use, so that the number of times of repeated welding operation on the pin shaft 1 is reduced, and the damage risk of the pin shaft 1 is reduced. Meanwhile, the disassembly and repeated welding procedures of the connecting nut 2 are saved, the overhaul time is shortened, and the overhaul efficiency is improved.
Thirdly, the jacking tool 3 is connected with the connecting nut 2 by adopting the screw rod 4, so that the assembly and disassembly are quick and convenient, the damage of welding to the jacking tool 3 is avoided, and the repeated use of the jacking tool 3 is facilitated.
Fourth, once the conventional T-shaped jack is installed on the pin 1, the distance between the jack and the shell of the fan-shaped section of the slab caster is determined, that is, the size of the installation area of the jack is determined, so that the T-shaped jack with one specification can only be suitable for the jack with the corresponding specification. Therefore, it is necessary to manufacture a T-shaped jack according to the specifications of the jack to be used, and there is a possibility that the jack may be not adapted to different specifications. According to the invention, the screw rod 4 passes through the through hole 3D on the jacking tool 3 and is movably connected with the jacking tool 3 along the axial direction thereof, namely, the jacking tool 3 can axially move along the screw rod 4 to adjust the position of the jacking tool 3 in the axial direction of the screw rod 4, so that the distance between the jacking tool 3 and the fan-shaped section shell of the slab caster is adjustable, namely, the size of a jack installation area is adjustable, and therefore, the invention is applicable to jacks with various specifications and the installation of the jack is more convenient. The limiting device is arranged, so that the jacking device 3 is connected to the screw rod 4, the jacking device 3 is prevented from sliding off from the outer end of the screw rod 4, and meanwhile, the spacing between the jacking device 3 and the fan-shaped section shell of the slab caster is limited and adjusted.
The inner end of the screw rod 4 described in the specification refers to the end of the screw rod 4 connected with the connecting nut 2, and the corresponding outer end of the screw rod 4 is the inner end.
In the present invention, in order to facilitate screwing of the lock nut 6, as shown in fig. 2, the top tool 3 includes a top plate 3A and side plates 3B on both sides of the top plate 3A, and a groove structure with an outward opening is formed by surrounding the top plate 3A and the side plates 3B, and the through hole 3D is disposed on the top plate 3A. Compared with a single thick steel plate, the groove-shaped jacking tool 3 has higher strength; compared with a rectangular structure, the novel steel plate has the advantages that the strength requirement is met, the investment of manufacturing materials is less, the cost is saved, the weight is smaller, and the novel steel plate is easy to disassemble and assemble quickly.
In the present invention, the jack 3 may be formed by welding a top plate 3A and a side plate 3B, and both the top plate 3A and the side plate 3B are steel plates 30mm thick.
In order to further enhance the strength of the jack 3, a reinforcing rib 3C is provided between the top plate 3A and the side plate 3B, and the reinforcing rib 3C is located in a groove-shaped region formed by surrounding the top plate 3A and the side plate 3B.
The limiting device can be a bolt and the like, and the limiting device can realize the limiting of the jacking device 3 on the screw rod 4 by arranging a pin hole along the radial direction of the screw rod 4 and abutting against the jacking device 3 after the bolt is inserted into the pin hole. In the invention, the limiting device comprises a base plate 5 and a locking nut 6; the backing plate 5 passes through the screw rod 4 from the outer end of the screw rod 4 to abut against the ejector 3, the locking nut 6 is in threaded fit connection with the screw rod 4, and the backing plate 5 is positioned between the ejector 3 and the locking nut 6. The structure is connected reliably.
The base plate 5 comprises a square base plate 5A and a round base plate 5B, the square base plate 5A is positioned between the round base plate 5B and the top plate 3A, and the square base plate 5A abuts against the side plate 3B through the screw rod 4. Because the top tool 3 is of a groove structure with an outward opening, the square base plate 5A is matched with the groove structure of the top tool 3, and the contact surface of the square base plate and the top tool 3 is larger. The diameter of the outer circular base plate 5B is smaller than the diameter of the inscribed circle of the square base plate 5A, and the distance between the square base plate 5A and the lock nut 6 is increased by the circular base plate 5B, so that the assembly of the lock nut 6 is facilitated.
A method for dismantling a pin shaft from a fan-shaped section of a slab caster,
step one, welding a connecting nut 2 on the outer end face of a pin shaft 1, wherein the connecting nut 2 is coaxial with the pin shaft 1 and has an outer diameter smaller than the outer diameter of the pin shaft 1; the inner end of a screw rod 4 is in threaded connection with a connecting nut 2, and the outer end sequentially passes through a through hole 3D of a jacking tool 3, a backing plate 5 and is in threaded connection with a locking nut 6;
step two, adjusting the position of the lock nut 6 on the screw rod 4 to enable the space between the inner side surface of the jacking tool 3 and the shell of the fan-shaped section of the slab caster to be matched with the installation size of the jack 7;
step three, placing the jack 7 between the inner side surface of the jacking tool 3 and the fan-shaped section shell of the slab caster, and erecting the jack 7 on the jacking tool 3 after adjusting the jack 7 in place;
step four, the jack 7 is extended, and the pin shaft 1 is ejected out;
and fifthly, removing the jack 7 and the screw rod 4 of the jack 3, and retaining the connecting nut 2 on the pin shaft 1.
The invention discloses a method for dismantling a pin shaft in a fan-shaped section of a slab caster, which is characterized in that a connecting nut 2 is welded on the outer end surface of a pin shaft 1, and the connection is reliable; the screw rod 4 passes through the through hole 3D of the jack 3 and is in threaded connection with the connecting nut 2, so that the connection is convenient and quick, the quick assembly and disassembly of the jack 3 are realized, and the quick installation of the jack 7 is realized.
The outer diameter of the connecting nut 2 is smaller than that of the pin shaft 1, so that the position of the outer end surface of the pin shaft 1 is ensured to be enough for welding the connecting nut 2, and the difficulty of welding operation is reduced; and ensures that the welding position is on the outer end surface of the pin shaft 1, and does not affect the outer circumferential surface of the pin shaft, namely, the assembly matching surface of the pin shaft is not damaged.
The connecting nut 2 and the pin shaft 1 are coaxial, so that the stress balance can be ensured, and the pin shaft can be conveniently and smoothly ejected under the action of the jacking forces of the two jacks 7 at the two sides.
In addition, after the pin shaft 1 is ejected, the connecting nut 2 does not need to be cut off, the pin shaft 1 with the connecting nut 2 is assembled back to the pin hole after maintenance is completed, qualified spare parts are assembled on line for a certain period and then are disassembled for maintenance, the connecting nut 2 can be reused, and the procedures of cutting off and re-welding by people are reduced.
According to the invention, when the slab caster fan-shaped section opening device is used for dismantling the pin shafts, the qualification rate of dismantling the pin shafts reaches more than 99%, the time for dismantling one pin shaft is within 30-40 minutes, and the overhaul efficiency is greatly improved.
The inner side surface of the jack 3 refers to the side surface of the jack 3 opposite to the pin shaft 1. When the top 3 has a groove-shaped structure with an outward opening surrounded by the top plate 3A and the side plate 3B, the inner side surface of the top 3 is the opposite side surface of the top plate 3A from the side plate 3B.
In order to facilitate the installation of the jack 7, in the second step, the distance between the inner side surface of the jack 3 and the slab caster sector is D, and the height of the jack is H; D-H is less than or equal to 30mm and less than or equal to 50mm.
Claims (5)
1. The utility model provides a slab caster fan-shaped section opening device, includes the support that forms jack installation zone with between slab caster fan-shaped section casing, its characterized in that: the bracket comprises a screw rod (4), a jacking tool (3) for erecting a jack (7) and a connecting nut (2) fixed on the pin shaft (1); the connecting nut (2) is coaxially welded to the outer end face of the pin shaft (1); a through hole (3D) is formed in the jacking tool (3); the inner end of the screw rod (4) is in threaded fit connection with the connecting nut (2), and the outer end of the screw rod passes through a through hole (3D) on the jacking tool (3) and is movably connected with the jacking tool (3) along the axial direction of the jacking tool; a limiting device is arranged between the screw rod (4) and the jacking tool (3), and the jacking tool (3) is detachably connected to the screw rod (4) through the limiting device;
the limiting device comprises a base plate (5) and a locking nut (6); the backing plate (5) passes through the screw rod (4) from the outer end of the screw rod (4) to abut against the jacking tool (3), the locking nut (6) is in threaded fit connection with the screw rod (4), and the backing plate (5) is positioned between the jacking tool (3) and the locking nut (6);
the top tool (3) comprises a top plate (3A) and side plates (3B) on two sides of the top plate (3A), a groove-shaped structure with an outward opening is formed by surrounding the top plate (3A) and the side plates (3B), and the through hole (3D) is formed in the top plate (3A);
the base plate (5) comprises a square base plate (5A) and a round base plate (5B), the square base plate (5A) is located between the round base plate (5B) and the top plate (3A), and the square base plate (5A) passes through the screw rod (4) to abut against the side plate (3B).
2. The slab caster segment opening device of claim 1, wherein: the top tool (3) comprises a top plate (3A) and side plates (3B) on two sides of the top plate (3A), the top plate (3A) and the side plates (3B) are surrounded to form a groove-shaped structure with an outward opening, and the through holes (3D) are formed in the top plate (3A).
3. The slab caster segment opening device of claim 2, wherein: a reinforcing rib (3C) is arranged between the top plate (3A) and the side plate (3B), and the reinforcing rib (3C) is positioned in a groove-shaped area formed by surrounding the top plate (3A) and the side plate (3B).
4. A method for disassembling a pin shaft of a slab caster fan-shaped section by adopting the slab caster fan-shaped section disassembling device as claimed in claim 1, which is characterized in that:
welding a connecting nut (2) on the outer end face of a pin shaft (1), wherein the connecting nut (2) is coaxial with the pin shaft (1) and has an outer diameter smaller than the outer diameter of the pin shaft (1); the inner end of the screw rod (4) is in threaded connection with the connecting nut (2), and the outer end sequentially penetrates through a through hole (3D) of the ejector (3), the base plate (5) and is in threaded connection with the locking nut (6);
step two, adjusting the position of the lock nut (6) on the screw rod (4) to enable the space between the inner side surface of the jacking tool (3) and the shell of the fan-shaped section of the slab caster to be matched with the installation size of the jack (7);
step three, arranging a jack (7) between the inner side surface of the jack (3) and the shell of the fan-shaped section of the slab caster, and erecting the jack (7) on the jack (3) after adjusting the jack (7) in place;
step four, the jack (7) stretches, and the pin shaft (1) is ejected out;
and fifthly, removing the jack (7) and the screw rod (4) of the jack (3), and retaining the connecting nut (2) on the pin shaft (1).
5. The method for disassembling the pin shaft of the fan-shaped section of the slab caster according to claim 4, wherein: in the second step, the space between the inner side surface of the jacking tool (3) and the slab caster sector is D, and the height of the jack (7) is H; D-H is less than or equal to 30mm and less than or equal to 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154653.5A CN112975835B (en) | 2021-02-04 | 2021-02-04 | Slab continuous casting machine sector section opening device and method for dismantling pin shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154653.5A CN112975835B (en) | 2021-02-04 | 2021-02-04 | Slab continuous casting machine sector section opening device and method for dismantling pin shaft |
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| Publication Number | Publication Date |
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| CN112975835A CN112975835A (en) | 2021-06-18 |
| CN112975835B true CN112975835B (en) | 2023-04-21 |
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