CN115921845A - Ladle down nozzle with opening and closing functions and using method thereof - Google Patents

Abstract

The invention relates to a ladle down nozzle with a switching function and a using method thereof, and the ladle down nozzle comprises a down nozzle body, a down nozzle rotor and a rotor wrench, wherein the middle part of the down nozzle body is provided with a steel pouring hole, the down nozzle rotor is arranged in the down nozzle body and can axially rotate in the down nozzle body, a through hole is arranged in the down nozzle rotor, the inner diameter of the through hole is the same as the inner diameter of the steel pouring hole, one side of the down nozzle rotor is exposed out of the down nozzle body and is provided with a hole which is matched and spliced with the rotor wrench, and the rotor wrench can drive the down nozzle rotor to rotate after being inserted into the down nozzle rotor. In order to prevent the steel leakage accident of the ladle, a layer of insurance is additionally arranged, and a double insurance pattern is formed together with the sliding plate mechanism.

Description

Ladle down nozzle with opening and closing functions and using method thereof

Technical Field

The invention relates to the technical field of a steel ladle refractory material drainage port, in particular to a steel ladle drainage port with a switching function and a using method thereof.

Background

The ladle sliding gate mechanism (as shown in figure 1 and figure 2) is an important system for controlling the flow of molten steel in a ladle, and is important equipment for safely, stably and reliably injecting high-temperature molten steel in the ladle into a tundish. The operation quality of the system is directly related to the smooth operation of continuous casting steel, the service life of the system is long, the use effect is good, the system has important influence on continuous casting production, if steel penetrating accidents occur in the use process of the system, the system can cause serious production accidents such as casting machine breaking, burning of continuous casting equipment and the like, the stable operation of production is restricted, and the safety of human bodies and equipment is seriously threatened. The sliding plate used for executing the opening and closing functions in the steel ladle sliding water gap mechanism system is divided into an upper sliding plate and a lower sliding plate, the upper sliding plate is a fixed sliding plate, the lower sliding plate is a sliding plate, the opening and closing of the steel flow are realized through the sliding of the sliding plate mechanism, the adjustment effect of the size of the steel flow is realized, if the sliding plate fails during use, serious consequences can be caused, the service life of the sliding plate is influenced by multiple factors, such as unreasonable installation, unreasonable pouring and flow control in production, unreasonable oxygen burning operation, different steel erosion, fluctuation of the sliding plate quality in production and the like, the same sliding plate is caused, the service life is uneven, and due to the fact that only one device for controlling the steel flow is arranged, the risk in the continuous casting steel pouring process is high, the safety factor is low, and in order to solve the problem, a device for controlling the steel flow must be added, double insurance can be formed, and the risk is reduced. If a set of sliding plate mechanism is added, the effect can be achieved, but the investment is large, the cost of a steel mill is increased greatly, the implementation effect is not good, the effect of double insurance can be achieved without greatly increasing the cost, and the problem needs to be solved by technical personnel in the field.

In summary, the present invention is to solve the problem of how to realize continuous casting production without increasing the cost greatly on the premise of reducing the production safety risk, and to improve the economic benefit.

Disclosure of Invention

Compared with the traditional ladle down nozzle, the ladle down nozzle provided by the invention has the advantages that the function of opening and closing the molten steel flow is added, a double-insurance pattern is formed together with a sliding plate mechanism, the occurrence of steel leakage accidents is avoided, and the safe production level is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a mouth of a river under ladle with switch function, includes mouth of a river body down, the intermediate part of mouth of a river body is equipped with down the steel hole of watering, still includes mouth of a river rotor, rotor spanner down, down mouth of a river rotor sets up this internal and can be at this internal axial rotation of mouth of a river down, be equipped with the through-hole in the rotor of the mouth of a river down, the through-hole internal diameter is the same with the steel hole internal diameter of watering, one side of mouth of a river rotor exposes outside mouth of a river body down to be equipped with the hole of pegging graft with rotor spanner cooperatees in this side, rotor spanner can drive down mouth of a river rotor rotation after inserting down mouth of a river rotor.

One side of the lower nozzle body is provided with an assembly opening of a lower nozzle rotor, a rotor groove is formed in the inner wall of the side, opposite to the assembly opening, of the lower nozzle rotor, the lower nozzle rotor is rotatably connected with the rotor groove, a rotor cover plate is arranged at the assembly opening, the lower nozzle rotor is rotatably connected with the rotor cover plate, a steel shell wraps the outer portion of the lower nozzle body, and the rotor cover plate is wrapped by the steel shell.

Graphite powder is filled between the lower nozzle rotor and the rotor groove, and graphite powder is filled between the nozzle rotor and the rotor cover plate.

And a metal embedded part is fixed in a hole where the lower nozzle rotor is matched and spliced with the rotor wrench.

The positioning fixing rod is fixedly connected with a lower sliding plate of the sliding plate mechanism, a through hole is formed in the positioning fixing rod, and the positioning fixing pin penetrates through the through hole in the positioning fixing rod and is fixedly connected with the rotor wrench in an inserting mode.

A use method of a ladle down nozzle with a switch function comprises the following steps:

installing the lower nozzle body on the sliding plate mechanism, inserting a rotor wrench onto the lower nozzle rotor, adjusting the lower nozzle rotor to be in a closed state, and then positioning and connecting the rotor wrench with a positioning fixing rod by using a positioning fixing pin;

when pouring is needed, after a ladle is connected with a long nozzle on a ladle turret, the positioning fixing pin bolt is firstly detached, then the rotor wrench is rotated to enable the inner hole of the lower nozzle rotor to coincide with a pouring steel hole, the lower nozzle is in an open state, then the positioning fixing pin bolt is used for positioning and connecting the rotor wrench and the positioning fixing rod, then the sliding plate is opened for molten steel pouring, after the molten steel pouring is completed, the sliding plate is firstly closed, then the rotor wrench is rotated, the lower nozzle is closed, and the rotor wrench is fixed.

Compared with the prior art, the invention has the beneficial effects that:

1) In order to avoid the occurrence of steel leakage accidents of the steel ladle, a layer of insurance is additionally arranged, a double insurance pattern is formed together with the sliding plate mechanism, if the sliding plate has the steel leakage accidents, the down nozzle is usually in a closed state, and is only in an open state when steel is poured, so that the molten steel can be sealed in the down nozzle, the steel leakage accidents are avoided, and the safety production level is improved.

2) In the actual work of a steel mill, in order to ensure safe production, a high safety factor of use is generally reserved for the sliding plate by reducing the use times of the sliding plate, for example: the service life given by a manufacturer is 10 times, and a user unit is off-line only by using 8 times; due to the design of the invention, the limit times that the actual service life of the sliding plate can reach can be exerted, so that the waste of the service life of the sliding plate can be reduced, and the economic benefit is improved.

Drawings

Fig. 1 is a schematic sectional view showing a state where a ladle slide gate valve is closed;

FIG. 2 is a schematic sectional view showing a state where a ladle slide gate nozzle is opened;

in fig. 1 and 2: 2-nozzle brick cup, 3-upper nozzle, 13-upper sliding plate, 14-lower sliding plate and 15-traditional lower nozzle;

FIG. 3 is a sectional view of the combination position of the bottom of the ladle, an upper nozzle, a sliding plate mechanism and a lower nozzle with a switch function of the invention:

in fig. 3: 1-ladle iron shell, 2-nozzle brick cup, 3-upper nozzle, 4-sliding plate mechanism, 5-lower nozzle body, 11-positioning fixed rod and 12-positioning fixed pin;

FIG. 4 is a cross-sectional view of the drain of the present invention;

in fig. 4: 5-a lower nozzle body, 6-a steel shell, 7-a lower nozzle rotor, 8-a rotor cover plate, 9-a metal embedded part and 10-a rotor wrench;

fig. 5 is a perspective view of the collector nozzle body of the embodiment;

in fig. 5: 16-an assembly port;

FIG. 6 is a perspective view of the collector nozzle rotor;

FIG. 7 is a perspective view of a rotor cover plate;

FIG. 8 is a perspective view of a metal inlay of an embodiment;

FIG. 9 is a perspective view of the steel can;

FIG. 10 is a perspective view of a wrench of the drain nozzle of the embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only illustrative and are not intended to limit the present invention.

As shown in fig. 3-10, a ladle drain with a switching function includes a drain body 5, a steel pouring hole is formed in the middle of the drain body 5, a drain rotor 7 and a rotor wrench 10, the drain rotor 7 is disposed in the drain body 5 and can rotate axially in the drain body 5, a through hole is formed in the drain rotor 5, the inner diameter of the through hole is the same as the inner diameter of the steel pouring hole, one side of the drain rotor 7 is exposed outside the drain body 5, a hole matched and inserted with the rotor wrench 10 is formed in the side, and the rotor wrench 10 can drive the drain rotor 7 to rotate after being inserted into the drain rotor 7. The rotor wrench end may be triangular or polygonal.

One side of the lower nozzle body 5 is provided with an assembly opening 16 of the lower nozzle rotor 7, a rotor groove is formed in the inner wall of the side, opposite to the assembly opening 16, of the lower nozzle rotor 7, the rotor groove is rotatably connected with the lower nozzle rotor 7, a rotor cover plate 8 is arranged at the assembly opening 16, the lower nozzle rotor 7 is rotatably connected with the rotor cover plate 8, the outer portion of the lower nozzle body 5 is wrapped by a steel shell 6, and the rotor cover plate 8 is wrapped by the steel shell 6.

Graphite powder is filled between the lower nozzle rotor 7 and the rotor groove, and graphite powder is filled between the nozzle rotor 7 and the rotor cover plate 8.

And a metal embedded part 9 is fixed in a hole where the lower nozzle rotor 7 and the rotor wrench 10 are matched and inserted.

The positioning fixing rod 10 is fixedly connected with a lower sliding plate of the sliding plate mechanism 4, a through hole is formed in the positioning fixing rod 11, and the positioning fixing pin 12 penetrates through the through hole in the positioning fixing rod 11 to be fixedly connected with the rotor wrench 10 in an inserting mode.

The diameter of the inner hole of the lower nozzle rotor 7 is the same as that of the inner hole of the lower nozzle body 5, the size of each part of the lower nozzle rotor 7 is in clearance fit with the size of the lower nozzle body 5, the clearance is less than 0.9mm, and the gap is filled with graphite powder to play a role in lubrication; the size of each part of the lower nozzle rotor 7 is in clearance fit with the size of the rotor cover plate 8, the clearance is less than 0.9mm, and the gap is filled with graphite powder and plays a role in lubrication; the size of each part of the rotor cover plate 8 is in clearance fit with the size of the lower nozzle body 5, the clearance is less than 1mm, the gap is filled with fire clay to play a role in sealing and bonding, the size of each part of the steel shell 6 is in clearance fit with the sizes of the lower nozzle body 5 and the rotor cover plate 8, the clearance is less than 1.8mm, and the gap is filled with fire clay to play a role in sealing and bonding; the metal embedded part 9 is embedded on the lower nozzle rotor 7, the positioning fixing pin 12 is arranged on the positioning fixing rod 11, and the positioning fixing rod 11 is arranged on the lower sliding plate of the sliding plate mechanism 4.

The lower nozzle body 5, the lower nozzle rotor 7 and the rotor cover plate 8 are made of refractory materials, and the steel shell 6, the metal embedded part 9 and the rotor wrench 10 are made of steel.

The manufacturing method of the invention comprises the following steps:

after the size of the lower nozzle is determined, each part of the lower nozzle is manufactured respectively, after the manufacture is finished, the assembly is carried out, firstly, the metal embedded part 9 is stuck at the reserved position of the lower nozzle rotor 7 by refractory mortar, then, the graphite powder is mixed into paste by dextrin and water, then, the paste-like graphite powder is coated on the whole surface of the lower nozzle rotor 7 with the thickness of 2-3 mm, the lower nozzle rotor 7 is arranged in an assembly opening 16 of the lower nozzle body 5, the extruded redundant graphite powder paste is wiped off, then, a layer of refractory mortar is coated on the position, matched with the lower nozzle body 5, of the rotor cover plate 8, the thickness is 2-3 mm, the rotor cover plate 8 is assembled on the lower nozzle rotor 7 and the lower nozzle body 5, redundant fire clay is wiped off, the ladle lower nozzle green brick with the switch function is assembled, after the rotor cover plate 8 is pressed tightly, a layer of fire clay is smeared on the assembled lower nozzle green brick, the thickness is moderate, then the steel shell 6 is slowly sleeved on the lower nozzle green brick from the small end of the lower nozzle green brick, redundant fire clay extruded from the lower nozzle is wiped off, the lower nozzle green brick is placed into a drying kiln at 200-300 ℃ for drying, and when the drying is 24-48 hours, the preparation of the ladle lower nozzle with the switch function is completed.

Taking a 180-ton ladle in a certain steel mill as an example:

according to the size requirements of the sliding plate, the sliding plate mechanism and the long nozzle in the steel plant, the shape and the size of the lower nozzle are designed and determined, and the lower nozzle comprises the following parts (shown in figure 4) according to the embodiment: the nozzle comprises a lower nozzle body 5, a lower nozzle rotor 7, a steel shell 6, a rotor cover plate 8, a metal embedded part 9 and a rotor wrench 10.

The inner hole diameter size of the lower nozzle rotor 7 is the same as the inner hole diameter size of the lower nozzle body 5, the sizes of all parts of the lower nozzle rotor 7 and the size of the lower nozzle body 5 are in clearance fit, the clearance is 0.8mm, the gap is filled with graphite powder and plays a role in lubrication, the sizes of all parts of the lower nozzle rotor 7 and the size of the rotor cover plate 8 are in clearance fit, the clearance is 0.9mm, the gap is filled with refractory clay and plays a role in sealing and bonding, the sizes of all parts of the steel shell 6 and the sizes of the lower nozzle body 5 and the rotor cover plate 8 are in clearance fit, the clearance is 1.5mm, the gap is filled with refractory clay and plays a role in sealing and bonding, the metal embedded part 9 is bonded at the position reserved by the refractory clay, the positioning fixing pin 10 (shown in figure 3) is installed on the positioning fixing rod 11, and the positioning fixing rod 11 is installed on the sliding plate mechanism 4.

Manufacturing and assembling the drain port, and finally drying.

The using method comprises the following steps:

install down mouth of a river body 5 on slide mechanism 4, peg graft rotor spanner 10 to down mouth of a river rotor 7 again, adjust down mouth of a river rotor 7 for closed condition, 7 inner hole central axes of the rotor of the mouth of a river this moment and runner central axis contained angle are 90, and rotor spanner 10 is in the vertical state with ground, then with location fixed pin 12 with rotor spanner 10 with location fixed lever 11 location connection.

In the embodiment, the positioning fixing rod 11 is provided with two positioning holes, which are respectively located at two positions, namely, the position where the rotor wrench 10 is vertical to the ground and the position where the rotor wrench 10 is horizontal.

After the ladle is completely prepared, molten steel is filled, after molten steel refining treatment is completed, when pouring is needed, after the ladle is connected with a long nozzle on a ladle turret, a positioning fixing pin 12 is firstly detached by a tool, then a rotor wrench 10 is rotated by the tool, the rotor wrench 10 rotates by 90 degrees with the central axis of a nozzle rotor 7 as an axis, the rotor wrench 10 is in a horizontal state, at the moment, the inner hole of the nozzle rotor 7 is superposed with a pouring steel hole, the nozzle is in an open state, then the positioning fixing pin 12 is used for positioning and connecting the rotor wrench 10 with the positioning fixing rod 11, then the sliding plate is opened for molten steel pouring, and after the molten steel pouring is completed, the sliding plate is firstly closed, then the rotor wrench 10 is rotated, the nozzle is closed, and the rotor wrench 10 is fixed. Therefore, in the whole molten steel ladle filling process, if the sliding plate has a steel leakage accident, the water outlet can act to close the steel flow, so that the steel leakage accident can not occur.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.

Claims (6)

1. The utility model provides a mouth of a river under ladle with switch function, includes mouth of a river body down, the intermediate part of mouth of a river body is equipped with down the steel hole of watering, its characterized in that still includes mouth of a river rotor, rotor spanner down, down the mouth of a river rotor sets up this internal and can be in this internal axial rotation of mouth of a river down, be equipped with the through-hole down in the mouth of a river rotor, the through-hole internal diameter is the same with the steel hole internal diameter of watering, one side of mouth of a river rotor is exposed outside this body of mouth of a river down to be equipped with the hole of pegging graft with rotor spanner cooperatees in this side, rotor spanner can drive down mouth of a river rotor after inserting mouth of a river rotor down and rotate.

2. The ladle nozzle with the opening and closing function as claimed in claim 1, wherein a mounting opening of the nozzle rotor is formed on one side of the nozzle body, a rotor groove is formed on an inner wall of the nozzle body on the opposite side of the mounting opening, the nozzle rotor is rotatably connected with the rotor groove, a rotor cover plate is arranged at the mounting opening, the nozzle rotor is rotatably connected with the rotor cover plate, a steel shell is wrapped outside the nozzle body, and the rotor cover plate is wrapped in the steel shell.

3. The ladle drain nozzle with the switch function according to claim 2, wherein graphite powder is filled between the drain nozzle rotor and the rotor groove, and graphite powder is filled between the drain nozzle rotor and the rotor cover plate.

4. The ladle nozzle with the switch function as claimed in claim 1, wherein a metal buried part is fixed in a hole in which the nozzle rotor is matched and inserted with the rotor wrench.

5. The ladle drain with the switching function according to claim 1, further comprising a positioning fixing rod and a positioning fixing pin, wherein the positioning fixing rod is fixedly connected with the lower sliding plate of the sliding plate mechanism, the positioning fixing rod is provided with a through hole, and the positioning fixing pin passes through the through hole of the positioning fixing rod and is fixedly inserted into the rotor wrench.

6. A method for using the ladle nozzle with the opening and closing function according to any one of claims 1 to 5, which comprises the following steps:

installing the lower nozzle body on the sliding plate mechanism, inserting a rotor wrench onto the lower nozzle rotor, adjusting the lower nozzle rotor to be in a closed state, and then positioning and connecting the rotor wrench with a positioning fixing rod by using a positioning fixing pin;

when pouring is needed, after a ladle is connected with a long nozzle on a ladle turret, the positioning fixing pin bolt is firstly detached, then the rotor wrench is rotated to enable the inner hole of the lower nozzle rotor to coincide with a pouring steel hole, the lower nozzle is in an open state, then the positioning fixing pin bolt is used for positioning and connecting the rotor wrench and the positioning fixing rod, then the sliding plate is opened for molten steel pouring, after the molten steel pouring is completed, the sliding plate is firstly closed, then the rotor wrench is rotated, the lower nozzle is closed, and the rotor wrench is fixed.

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