EP2085165B1

EP2085165B1 - A slide gate for a molten-steel vessel and assembling method thereof

Info

Publication number: EP2085165B1
Application number: EP06805070.7A
Authority: EP
Inventors: Yueqin Liu
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2016-06-01
Anticipated expiration: 2026-10-26
Also published as: CN101405100A; KR20090089248A; CN101405100B; KR101241490B1; ES2590353T3; WO2008049279A1; EP2085165A4; JP5064509B2; JP2010507484A; EP2085165A1

Description

Field of the Invention

The present invention relates to a ladle flow control system installed on the outer side of base plate at the liquid steel outlet of ladle and its assembly method, which belong to the technical field of machine manufacturing. In particular, the present invention relates to a ladle flow control system according to the preamble of claim 1, such as it is for example known from EP 1 029 618 A1 and its assembly method.

Description of the Prior art

According to the mode of motion between the slider and carrier frame and the process of building up slide plate interface pressure, the ladle flow control systems of prior art mainly include two types of devices: The mode of motion for device 1 is the relative motion between rails, which is used to achieve the open and close of ladle sliding nozzle, the mode for building slide plate interface pressure is manual impaction; The mode of motion for device 2 is the relative motion between rail wheel and rail, which is used to achieve the open and close of ladle sliding nozzle, and the mode for building slide plate interface pressure is automatic impaction. In the operation process of device 1, the surface contact between rails has high safety but may not automatically build slide plate interface pressure, thus leading to complicated operations and high labor intensity; In the process of building slide plate interface pressure, the device 2 pulls the rail wheel on the rail. At this time, the interface pressure on the mechanism slide plate is automatically built. However, in the operation process, the rail wheel and the rail need making relative motion, so that the contact between rail wheel and rail is line contact, and the pressure of the entire mechanism is transmitted through the contact line, causing serious abrasion on the roller and rail. Such operation has relatively high requirement for the rail wheel and rail, thus affecting the safety operation of the entire mechanism; At the same time, the hold-down force of the elastic is generated after the rail wheel of slider has been transmitted to the rail on carrier frame. In the entire operation process, the transmission points for slide plate interface pressure varies along with the movement of slider. Therefore, the slide plate interface pressure is not stable. In addition, since the fixing mechanisms for the bottom plate and slide plate of said two types of devices have unreasonable structures, these fixing mechanisms have short service life and involve complicated operations and high labor intensity.

Summary of the Invention

The first technical object of the present invention is to provide a ladle flow control system aiming at overcoming the deficiency of prior art. This device adopts the relative motion between rails, controls the open and close of ladle sliding nozzle in the mode of surface contact, and achieves the automatic impaction of device by means of the rolling on carrier frame and the guide rail on housing. In the relative motion between the slider and carrier frame, the fluctuation in the slide plate interfacial pressure is obviously reduced, so that the overall stability of system is improved.
The second technical object of the present invention is to provide a ladle flow control system aiming at overcoming the deficiency of prior art. The extrusion devices for the bottom plate and slide plate are provided, which are featured by reasonable structure, simple operation and high safety and reliability.
The third technical object of the present invention is to provide an assembly method for ladle flow control system aiming at overcoming the deficiency of prior art. In the process of installation and disassembly of this device, this method achieves the compression or release of elastic, forms the dynamic process for the building and unloading the slide plate interface pressure. The hold-down force of elastic is generated by sliding the rail wheel on the carrier frame to the rail of housing part. After the generation of pressure, there is no fluctuation in the pressure with the movement of slider, so that the stability of pressure is obviously improved. Furthermore, the fixing mechanism for the bottom plate and slide plate is featured by reasonable structure, convenient and practical operations and high safety and reliability.
Said technical objects of the present invention are achieved by a ladle control system according to independent claim 1. Furthermore, an assembly method of a ladle control system according to independent claim 12 is provided. The dependent claims relate to advantageous embodiments. In particular the above objects are achieved by means of the technical solutions described as follows:

A ladle flow control system including a base plate fixed on the ladle, wherein a housing is fixed on this base plate; The top of the housing is connected with the driving mechanism of sliding nozzle; A carrier frame is provided on this housing, an elastic used for generating pressure is set on the carrier frame, and a slider is provided on the carrier frame. Notches are set on the corresponding surfaces of housing and slider. The bottom plate and the slide plate are respectively embedded in the notch. A long groove is set on the housing, and a blocking part is set at one end of the long groove along the inner wall in the direction towards the carrier frame; On the carrier frame, a rolling mechanism is set corresponding to this long groove. This rolling mechanism is embedded in the long groove, a guide rail is set on the inner side of blocking part; the rolling mechanism on the carrier frame moves toward the inside of long groove along the guide rail and is oriented at the blocking part.

Mutually jointed rails are correspondingly set on the carrier frame and the slider. Furthermore, the carrier frame and the slider make relative motion through the surface contact of the rails respectively set. To facilitate the rolling mechanism to enter the long groove, the guide rail forms an inclined plane along the direction of motion of the rolling mechanism, and the range of included angle between this inclined plane and horizontal plane is 15°- 45°. The blocking part may be the side wall at one end of long groove that extends towards the carrier frame along its inner side, and this extended side wall is bending relatively at its top. Or, said blocking part is the side wall at one end of long groove relative extends at its top. The rolling mechanism may be composed of rollers symmetrically set on the carrier frame. According to different requirements for space structure, these rollers may be set as holoaxial rollers or half-axle rollers. For the convenience of fixing slide plate in the notch of slider and fixing bottom plate in the notch of housing, an extrusion device is respectively set at one end of notch of slider and at one end of notch of housing. Such extrusion device mainly includes support frame, and the support frame is composed of the upper carrier frame and lower underframe. The upper and lower cover boards are respectively fixed on
the surfaces on both sides of carrier frame and fix the centrifugal wheel on the inside of carrier frame through a mandrel. The both ends of underframe are respectively fixed with extrusion poles, and the shapes and positions of the extrusion poles correspond to the edge shapes of the bottom plate and slide plate.
An assembly method for Ladle flow control system, which includes the following steps:

Step 1: Fix the housing on the ladle base plate, joint one side of carrier frame to one side of housing through pivot, install the slider on the carrier frame, fix the well block and nozzle, connect the driving mechanism of sliding nozzle with the top end of housing; Respectively fix the bottom plate and the slide plate on the housing and the slider, turn the carrier frame so that it is buckled with the housing and the rolling mechanism on the carrier frame is embedded in the groove on the housing.
Step 2_The driving mechanism of sliding nozzle drives the carrier frame with slider to make motion, so that the rolling mechanism on carrier frame moves into the long groove along the guide rail and is oriented at the blocking part. At this time, the elastic that is set on the carrier frame and is connected with the rolling mechanism is deformed under pressure, thus generating pre-tightening force. The carrier frame is oriented on the housing, and the driving mechanism may independently drive the slider to make reciprocating motion on the carrier frame so as to control the open or close of the ladle sliding nozzle.

To sum up, the ladle flow control system provided by present invention adopts the relative motion between rails to control the open and close of ladle sliding nozzle in the mode of surface contact and achieves the automatic impaction of device through the rolling mechanism on the carrier frame and the guide rail on the housing. In the process of relative motion between the slider and carrier frame, the fluctuation in the slide plate interface pressure is obviously reduced, so that the overall stability of system is improved. Provided with extrusion devices for the bottom plate and slide plate, this ladle flow control system is featured by reasonable structure, convenient and practical operation and high safety and reliability.
In the process of installation and disassembly of this device, the assembly method for ladle flow control system provided by the present invention achieves the compression or release of elastic, forms the dynamic process for the building and unloading the slide plate interface pressure. The hold-down force of elastic is generated by sliding the rail wheel on the carrier frame to the rail of housing part. After the generation of pressure, there is no fluctuation in the pressure with the movement of slider, so that the stability of slide plate interface pressure is obviously improved. Furthermore, the fixing mechanism for the bottom plate and slide plate is featured by reasonable structure, convenient and practical operations and high safety and reliability.
The technical proposal of the present invention is elaborated below in combination with the attached figures and the embodiments.

Brief Description of the Drawings

Figure 1 is the overall structure scheme of present invention;
Figure 2 is the structure scheme of the housing of present invention;
Figure 3 is the structure scheme of the carrier frame of present invention;
Figure 4 is the structure scheme of the extrusion device in the notch of slider of present invention;
Figure 5 is the overall structure scheme of the extrusion device of present invention;
Figure 6 is the decomposed structure scheme of various parts of extrusion device of present invention;
Figures 7-9 are the assembly schemes of the ladle flow control system of present invention;
Figure 10 is the structure scheme for the pressure generation process of the elastic of present invention.

Detailed Description of the Preferred Embodiments

Figure 1 is the overall structure scheme of present invention. As may be known from Figure 1, the present invention provides a ladle flow control system, which includes the base plate 100 fixed on the ladle; A housing 1 is fixed on this base plate 100, the top of housing 1 is connected with the driving mechanism 2 of sliding nozzle; A carrier frame 3 is set on the housing 1, an elastic 4 used for pressure generation is set on the carrier frame 3, a slider 5 is set on the carrier frame 3; The notches 11 and 51(Not shown in the Figure) are set on the corresponding surfaces of the housing 1 and the slider 5, and the bottom plate 111 and slide plate 511 are respectively embedded in the notch 11 and notch 51. Figure 2 is the structure scheme of the housing of present invention. As can be known from Figure 1 in combination with Figure 2, a long groove 12 is set on the housing 1, and a blocking part 13 is set on one end of this long groove 12 along the inner wall in the direction towards the
carrier frame 3. Figure 3 is the structure scheme of the carrier frame of present invention. As can be known from Figures 1-3, on the carrier frame3, a rolling mechanism 31 is set corresponding to this long groove 12, and this rolling mechanism 31 is embedded in the long groove 12; A guide rail 14 is set on the inner side of blocking part 13, and the rolling mechanism 31 on the carrier frame 3 moves toward the inside of long groove 12 along the guide rail 14 and is oriented at the blocking part 13. To facilitate the rolling mechanism 31 to move toward the inside of blocking part 13, the guide rail 14 forms an inclined plane 141 along the direction of motion of the rolling mechanism 31, and the range of the included angle between this inclined plane and the horizontal plane is 15° - 45°. The specific structure of the blocking part 13 may be designed in multiple forms. As shown in Figure 2, this structure may be the side wall at one end of the long groove 12 that extends towards the carrier frame 3 along its inner side, and this extended side wall is bending relatively at its top, thus forming the blocking part 13. Or, the structure is the side wall at one end of long groove 12 extends relatively at its top (Not shown in the Figure). The rolling mechanism 31 is composed of rollers symmetrically set on the carrier frame 3. These rollers are holoaxial rollers.
As shown in Figures 3 and 4, a rail 33 is set on the carrier frame 3, and rail 52 is correspondingly set on the slider 5; Furthermore, after the slider 5 has been installed on the carrier frame 3, the rail 33 and the rail 52 are mutually jointed, and the carrier frame 3 and the slider 5 make relative motion through the surface contact of the rails respectively set.
Figure 4 is the structure scheme of the extrusion device in the notch of slider of present invention; As can be known from Figure 2 in combination with Figure 4, an extrusion device 6 is set on one end of notch 51 that is set on the slider 5, the extrusion device 6 is used to fix the slide plate 511 in the notch 51 of slider 5; An extrusion device 6 is set at one end of the notch 11 that is set on the housing 1, and the extrusion device 6 is used to fix the bottom plate 111 in the notch 11 of housing 1. The structures and positions of the bottom plate 111 and slide plate 511 are shown in Figure 1. Figure 5 is the overall structure scheme of the extrusion device of present invention and Figure 6 is the
decomposed structure scheme of various parts of extrusion device of present invention. As may be known from Figures 5 and 6, the extrusion device 6 mainly includes the support frame 61, which is composed of the upper carrier frame 611 and the lower underframe 612. The upper cover board 62 and the lower cover board 63 are respectively fixed on the surfaces on both sides of upper carrier frame 611 and can fix the centrifugal wheel 65 in the upper carrier frame 611 through a mandrel 64. The extrusion poles 66 are respectively fixed on both ends of lower underframe 612; The shapes and positions of the extrusion poles 66 correspond to the edge shapes of the bottom plate 111 and the slide plate 511, so that it is possible to effectively make extrusion orientation of the bottom plate 111 and slide plate 511.
Figures 7-9 are the assembly schemes of the ladle flow control system of present invention. As may be known from the Figures, the present invention provides an assembly method for ladle flow control system, which includes the following steps:

As shown in Figure 7, the step 1 in the assembly process includes: Fix the housing 1 on the ladle base plate 100, joint one side of carrier frame 3 to one side of housing 1 through pivot, install the slider 5 on the carrier frame 3, connect the driving mechanism 2 of sliding nozzle with the top of housing 1; Respectively fix the bottom plate 111 and the slide plate 511 on the housing 1 and slider 5, turn the carrier frame 3 so that it is buckled with the housing 1 and the rolling mechanism 31 on the carrier frame 3 is embedded in the long groove 12 on the housing 1.

Step 1 also includes a specific step 11, in which the bottom plate 111 and the slide plate 511 are respectively fixed on the housing 1 and the slider 5 through extrusion devices 6. As shown in Figure 5 and Figure 6, in the process of fixing, firstly rotate the mandrel 64 through the turnbuckle 641 set on the external; This mandrel 64 drives the centrifugal wheel 65 inside the upper carrier frame 611 to rotate, the wheel rim of the centrifugal wheel 65 extrudes the lower underframe 612, the lower underframe 612 drives the extrusion pole 66, the extrusion poles 66 extrude the edges of bottom plate 111 and slide plate511, so as to fix them.
As shown in Figure 1, in the installation process, according to different requirements, after having installed the slider on the carrier frame, it is also necessary to fix the well block and nozzle on the housing before the driving mechanism of sliding nozzle is connected with the top of housing. Furthermore, it is also necessary to fix the well block exchangeable collector nozzle on the slider in the ladle lining process, after the entire mechanism has been installed on the ladle. The ladle lining mentioned herein refers to the process of setting refractory materials on the inner wall of ladle.
As shown in Figure 8, step 2 in the assembly process includes: the driving mechanism 2 of sliding nozzle drives the carrier frame 3 with slider 5 (not shown in the figure), so that the rolling mechanism 31 on the carrier frame 3 moves in the long groove 12 along the guide rail 14 (not shown in the figure) and is oriented at the blocking part 13. At this time, the elastic 4 set on carrier frame 3 (not shown in the figure) is deformed under pressure and thus generates pre-tightening force, the carrier frame 3 is oriented on the housing 1. By then, the driving mechanism 2 can independently drives the slider 5 to make reciprocating motion on the carrier frame 3, so as to control the open or close of the ladle sliding nozzle.
Step 2 also includes a specific step 22: An orientation device is set on the corresponding position of the carrier frame 3 and housing 1, which is used for the orientation of carrier frame 3 on the housing 1. To be specific, as shown in Figure 8 and Figure 9, this orientation device may be composed of a projecting orientation hole 32 set on the top of carrier frame 3 and the orientation peg 15 correspondingly set on the top of housing 1. According to different requirement for structure, this orientation device may also be composed of the orientation peg set at the end of carrier frame 3 and the orientation hole correspondingly set on the end of housing 1.
In said ladle flow control system, the elastic 4 that is set on the carrier frame 3 to generate pressure is spring nest 41 in general. As shown in Figure 1, a room used to accommodate the spring nest 41 is generally set on the edges on both sides of carrier frame 3. This room may be the groove for the spring nest, and the spring nest 41 is set inside the groove for the spring nest. Figure 10 is the structure scheme for the pressure generation process of the elastic of present invention. As can be known from Figure 10 in combination with Figure 3, the elastic 4 and rolling mechanism 31 are respectively set on the two sides of carrier frame 3. As shown in Figure 1, the rolling mechanism 31 adopts holoaxial rollers, and these rollers are located on both sides of a holoaxial 311; A support pole 411 is set in the middle of this holoaxial 311, and this support pole 411 and the holoaxial 311 constitute "T" shape and fix the cover board 42 and the spring nest 41 in the groove for the spring nest of the carrier frame 3 by means of the cover board 42 and the nut 43.
In the process of assembling ladle flow control system, firstly the rolling mechanism 31 enters the long groove 12; with the driving mechanism 2 of sliding nozzle driving the motion of carrier frame 3, the rolling mechanism 31 moves toward the blocking part along the long groove 12, and the rolling mechanism 31 enters the blocking part 13 along the guide rail 14 set below the blocking part 13. The inclined plane set on the end of guide rail 14 plays the role of guiding in this motion. Since the guide rail 14 has certain thickness, a longitudinal altitude difference is generated after and before the mechanism 31 has entered the blocking part 13. The positions of the rolling mechanism 31 before and after it has entered the blocking part 13 are respectively shown in the broken line and real line parts in Figure 10. The holoaxial 311 drives the support pole 411 to make downward motion; The nut 43 drives the cover board 42 to make downward motion, which in turn enables the spring nest 41 to have elastic deformation and generate a pretightening force. This pretightening force is the operating pressure of the flow control system. In such condition, this flow control system may achieve the normal open and close of ladle sliding nozzle under the driving force of the driving mechanism 2 of ladle sliding nozzle.
Since the bottom plate 111 and slide plate 511 rub against each other in the open and close actions of ladle sliding nozzle, they belong to vulnerable parts in need of regular replacement. In the process of hot repair, the process of their disassembly and the decompression process of spring nest 41 in the entire system are contrary to the assembly process, so that unnecessary details will not be given herein.

Claims

A ladle flow control system including the base plate (100) fixed on the ladle; a housing (1) is fixed on this base plate (100), and the top of housing (1) is connected with the driving mechanism (2) of sliding nozzle; a carrier frame (3) is set on this housing (1), an elastic (4) used for pressure generation is set on the carrier frame (3); a slider (5) is set on the carrier frame (3), and notches (11,51) are set on the corresponding surfaces of the housing (1) and slider (5), and the bottom plate (111) and the slide plate (511) are respectively embedded in the notches (11,15); further comprising a rolling mechanism (31) and at least one groove (12), characterized in that a long groove (12) is set on said housing (1), and a blocking part (13) is set on one end of long groove (12) along the inner wall in the direction towards the carrier frame (3); on the carrier frame (3), a rolling mechanism (31) is set corresponding to the long groove (12), and this rolling mechanism (31) is embedded in the long groove (12); a guide rail (14) is set on the inner side of blocking part (13), and the rolling mechanism (31) on the carrier frame (3) moves toward the inside of long groove (12) along the guide rail (14) and is oriented at the blocking part (13).
The ladle flow control system of Claim 1, characterized in that mutually jointed rails (33,52) are correspondingly set on the carrier frame (3) and the slider (5), and the carrier frame (3) and the slider (5) make relative motion through the surface contract of the rails (33,52).
The ladle flow control system of claim 1, characterized in that said guide rail (14) forms an inclined plane (141) along the direction of motion of the rolling mechanism (31).
The ladle flow control system of Claim 3, characterized in that the range of the included angle between said inclined plane (141) and the horizontal plane is 15°-45°.
The ladle flow control system of claim 1 or 2 or 3 or 4, characterized in that said blocking part (13) is the side wall at one end of long groove (12) that extends toward the carrier frame (3) along its inner side, and this extended side wall is bending relatively at its top.
The ladle flow control system of claim 1 or 2 or 3 or 4, characterized in that said blocking part (13) is the side wall at one end of long groove (12) extends relatively at its top.
The ladle flow control system of Claim 1 or 2 or 3 or 4, characterized in that said rolling mechanism (31) is composed of the rollers symmetrically set on the carrier frame (3).
The ladle flow control system of Claim 7, characterized in that said rollers are holoaxial rollers.
The ladle flow control system of Claim 1, characterized in that an extrusion device (6) is set on one end of the notch (51) of said slider (5), which is used to fix the slide plate (511) in the notch (51) of slider (5).
The ladle flow control system of Claim 1, characterized in that an extrusion device (6) is set at one end of notch (11) of said housing (1), which is used to fix the bottom plate (111) in the notch (11) of housing (1).
The ladle flow control system of Claim 9 or 10, characterized in that said extrusion device (6) mainly includes support frame (61), and the support frame (61) is composed of the upper carrier frame (611) and lower underframe (612); the upper cover board (62) and lower cover board (63) are respectively fixed on the surfaces on both sides of upper carrier frame (611) and fix the centrifugal wheel (65) on the inside of carrier frame (611) through a mandrel (64); the both ends of lower underframe (612) are respectively fixed with extrusion poles (66), and the shapes and positions of the extrusion poles (66) correspond to the edge shapes of the bottom plate (111) and slide plate (511).
An assembly method for ladle flow control system, characterized in that this method includes the following steps:
step 1: fix the housing (1) on the ladle base plate (100), joint one side of carrier frame (3) to one side of housing (1) through pivot, install the slider (5) on the carrier frame (3), connect the driving mechanism (2) of sliding nozzle with the top end of housing (1); respectively fix the bottom plate (111) and the slide plate (511) on the housing (1) and the slider (5), turn the carrier frame (3) so that it is buckled with the housing (1) and the rolling mechanism (31) on the carrier frame (3) is embedded in the long groove (12) on the housing (1);

step 2: the driving mechanism (2) of sliding nozzle drives the carrier frame (3) with slider (5) to make motion, so that the rolling mechanism (31) on carrier frame (3) moves in the long groove (12) along the guide rail (14) and is oriented at the blocking part (13); at this time, the elastic (4) that is set on the carrier frame (3) and is connected with the rolling mechanism (31) is deformed under pressure, thus generating pretightening force; the carrier frame (3) is oriented on the housing (1), and the driving mechanism (2) may independently drive the slider (5) to make reciprocating motion on the carrier frame (3) so as to control the open or close of the ladle sliding nozzle.
The assembly method for ladle flow control system of Claim 12, characterized in that said step 1 also includes the step 11: the bottom plate (111) and the slide plate (511) are respectively fixed on the housing (1) and the slider (5) through extrusion devices (6) in the specific steps as follows: rotate the mandrel (64); the mandrel (64) drives the centrifugal wheel (65) inside the carrier frame (611) to rotate; the wheel rim of centrifugal wheel (65) extrudes the lower underframe (612), the lower underframe (612) drives the extrusion poles (66), and the extrusion poles (66) extrude and fix the edges of the bottom plate (111) and slide plate (511).
The assembly method for ladle flow control system of Claim 12, characterized in that said step 2 also includes step 21: a orientation device is also set on the corresponding position of said carrier frame (3) and housing (1), which is used to the orientation of carrier frame (3) on the housing (1).
The assembly method for ladle flow control system of Claim 14, characterized in that said orientation device may be composed of an orientation hole (32) set on the top of carrier frame (3) and the orientation peg (15) set on the top of housing (1), or it is composed of the orientation peg set on the top of carrier frame and the orientation hole correspondingly set at the top of housing.