CN115657741A

CN115657741A - Liquid level control system, gas atomization powder making equipment and control method

Info

Publication number: CN115657741A
Application number: CN202211304108.0A
Authority: CN
Inventors: 于菁
Original assignee: Shenzhen Shenshan Special Cooperation Zone Wanze Precision Technology Co ltd
Current assignee: Shenzhen Shenshan Special Cooperation Zone Wanze Precision Technology Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-01-31

Abstract

The application relates to a liquid level control system, gas atomization powder making equipment and a control method, wherein the liquid level control system comprises a first weight sensing unit connected with a tundish component; an adjusting unit connected to the crucible assembly; the first laser sensing unit is arranged above the tundish component and is in contactless contact with the molten steel, the first laser sensing unit is used for sensing the molten steel injected into the tundish component to a preset liquid level height, and in the process of injecting the molten steel into the tundish component by the crucible component, after the first laser sensing unit senses the molten steel to reach the preset liquid level height, the adjusting unit can be controlled to change the injection rate according to the weight change of the tundish component detected by the first weight sensing unit, so that the molten steel of the tundish component is maintained at the preset liquid level height. The liquid level control system, the gas atomization powder preparation equipment and the control method can avoid introducing impurities to ensure the quality of prepared powder and avoid the phenomenon of bag blockage.

Description

Liquid level control system, gas atomization powder making equipment and control method

Technical Field

The application relates to the technical field of gas atomization powder making, in particular to a liquid level control system, gas atomization powder making equipment and a control method.

Background

The gas atomization powder making technology is that liquid metal flow is smashed into small liquid drops by utilizing high-speed airflow, and then the small liquid drops are quickly condensed to obtain formed powder. Gas atomization has become the most important method for producing fine spherical metal and alloy powders. In the process of gas atomization powder preparation, the quality of the prepared powder is influenced by various factors, such as gas pressure, superheat degree, tundish liquid level height, heating process and the like, wherein the tundish liquid level height has obvious influence on the quality of the prepared powder, the powder coarsening is caused by overhigh liquid level to influence the powder rate, and the liquid level is too low to easily cause the phenomenon of bag blockage to influence production. In the prior art, the liquid level is generally controlled manually and visually through an observation window to adjust the liquid level height, so that the control of the liquid level is very unstable, and the quality and the production progress of prepared powder are influenced.

Disclosure of Invention

The application aims to provide a liquid level control system, gas atomization powder preparation equipment and a control method, which are efficient and environment-friendly, and can avoid the phenomenon of bag blockage when impurities are introduced to ensure the quality of the prepared powder.

To this end, in a first aspect, the embodiments of the present application provide a liquid level control system, which is used for a gas atomization powder making apparatus, a melting chamber of the gas atomization powder making apparatus includes a tundish component and a crucible component, and is characterized in that the liquid level control system includes:

the first weight sensing unit is connected with the tundish component and used for detecting the weight of the tundish component;

the adjusting unit is connected with the crucible assembly and is used for adjusting the speed of injecting the molten steel into the tundish assembly by the crucible assembly;

a first laser sensing unit disposed above the tundish component, the laser sensing unit being in non-contact with the molten steel, the first laser sensing unit being configured to sense a height of the molten steel poured into the tundish component to a predetermined liquid level,

in the process that the crucible assembly injects the molten steel into the tundish assembly, after the first laser sensing unit senses that the molten steel reaches the preset liquid level height, the adjusting unit can be controlled according to the weight change of the tundish assembly detected by the first weight sensing unit to change the injection rate, so that the molten steel of the tundish assembly is maintained at the preset liquid level height.

In a possible implementation manner, when the molten steel in the tundish component reaches the preset liquid level height, the weight measured by the first weight sensing unit is a first preset weight,

the first weight sensing unit measures the weight of the tundish component once every first preset time, compares the measured weight with the first preset weight, and enables the adjusting unit to increase or decrease the speed of injecting the molten steel into the tundish component according to the comparison result.

In a possible implementation manner, the adjusting unit adjusts the crucible assembly to inject the molten steel into the tundish assembly at a first speed, the molten steel is stopped until the first laser sensing unit detects that the molten steel reaches the preset liquid level height, the adjusting unit adjusts the crucible assembly to inject the molten steel into the tundish assembly at a second speed after a second preset time, the second speed is adjustable, and the second speed is smaller than the first speed,

the first weight sensing unit measures the weight of the tundish component once every a first preset time interval, compares the measured weight with the first preset weight, increases a preset rate on the basis of the second rate of the time interval as the second rate of the next time interval if the measured weight is smaller than the first preset weight, and decreases the preset rate on the basis of the second rate of the time interval as the second rate of the next time interval if the measured weight is larger than the first preset weight.

In one possible implementation mode, the first laser sensing unit is rotatably connected to the outside of the smelting chamber and is positioned above the tundish component,

the first laser induction unit is used for emitting laser to the preset liquid level height and the axis of the tundish component, and a first preset included angle is formed and is adjustable.

In a possible implementation manner, when the crucible assembly injects the molten steel into the tundish assembly, the molten steel and an axis of the tundish assembly have a second preset included angle, the second preset included angle is larger than the first preset included angle, and the molten steel has no interference with the laser emitted by the first laser sensing unit.

In one possible implementation, the tundish component includes:

the bottom of the mounting rack is provided with an opening,

the tundish body is positioned on one side of the mounting rack, the accommodating cavity of the tundish body is used for accommodating the molten steel, and the bottom of the tundish body is provided with a nozzle;

the spraying plate is located on one side, opposite to the tundish body, of the mounting frame, the tundish body is connected with the spraying plate, the nozzle is communicated with a jet orifice of the spraying plate, and the first weight sensing unit is arranged on the spraying plate.

In a possible implementation manner, the first weight sensing unit is disposed on a side of the spray plate away from the tundish body, and the first weight sensing unit includes:

a first weight sensor for detecting the weight of the tundish body containing the molten steel,

the heat insulation layer is arranged between the spray disc and the first weight sensor;

and the water cooling layer is arranged between the heat insulation layer and the first weight sensor.

In one possible implementation, the crucible assembly includes:

the crucible body is used for containing molten steel;

the rotating mechanism is used for rotatably connecting the crucible body to the smelting chamber, and the adjusting unit is arranged on the rotating mechanism;

a second weight sensing unit provided to the rotation mechanism for detecting a weight of the crucible body, the second weight sensing unit being electrically connected to the adjusting unit,

the crucible body is provided with a preset weight, and when the second weight sensing unit detects that the weight of the crucible body is reduced to the preset weight, the adjusting unit adjusts the crucible assembly to stop injecting the molten steel into the tundish assembly.

In a possible implementation mode, the system further comprises a second laser sensing unit arranged above the tundish component, wherein the second laser sensing unit is used for sensing the height from the molten steel to the early warning liquid level injected into the tundish component, and the early warning liquid level is located above the preset liquid level.

In a possible implementation manner, the laser processing device further includes a control unit electrically connected to the first weight sensing unit, the adjusting unit and the first laser sensing unit, respectively.

In a second aspect, embodiments of the present application provide an atomized powder making apparatus including the liquid level control system as described above.

In a third aspect, an embodiment of the present application provides a liquid level control method, which is used for a liquid level control system of a gas atomization pulverizing apparatus, where the liquid level control system includes:

the first laser sensing unit is arranged above the tundish component, is not in contact with the molten steel and is used for sensing the molten steel injected into the tundish component to reach a preset liquid level height;

the control method comprises the following steps:

after the first laser sensing unit senses that the molten steel reaches the preset liquid level height, the adjusting unit is controlled according to the weight change of the tundish component detected by the first weight sensing unit to change the injection rate, so that the molten steel in the tundish component is maintained at the preset liquid level height.

In one possible implementation, the tundish component has a first predetermined weight when the molten steel in the tundish component reaches the predetermined liquid level height,

after the first laser sensing unit senses that the molten steel reaches the preset liquid level height, the control method comprises the following steps:

and controlling the first weight sensing unit to measure the weight of the tundish component once every first preset time, comparing the measured weight with the first preset weight, and controlling the adjusting unit according to a comparison result to increase or decrease the speed of injecting the molten steel into the tundish component.

In a possible implementation manner, the method specifically includes:

controlling the regulating unit to enable the crucible assembly to inject the molten steel into the tundish assembly at a first speed;

controlling the first laser sensing unit to sense the molten steel of the tundish component to reach the preset liquid level height, and stopping injecting the molten steel into the tundish component;

controlling the weight of the tundish component measured by the first weight sensing unit to be a first preset weight;

controlling an adjusting unit after a second preset time to enable the crucible assembly to inject the molten steel into the tundish assembly at a second speed, wherein the second speed is adjustable and is smaller than the first speed,

controlling the first weight sensing unit to measure the weight of the tundish component once every first preset time interval, comparing the measured weight with the first preset weight, if the measured weight is smaller than the first preset weight, increasing a preset rate on the basis of the second rate of the time interval to be used as the second rate of the next time interval, and if the measured weight is larger than the first preset weight, decreasing the preset rate on the basis of the second rate of the time interval to be used as the second rate of the next time interval.

In one possible implementation, the liquid level control system further includes a second weight sensing unit disposed on the crucible assembly, and the control method further includes:

and when the second weight sensing unit detects that the weight of the crucible assembly is reduced to the preset weight, the adjusting unit is controlled to adjust the crucible assembly to stop injecting the molten steel into the tundish assembly.

According to the liquid level control system, the gas atomization powder making equipment and the control method, the liquid level control system is used for the gas atomization powder making equipment, in the process of injecting molten steel into a tundish component by using a crucible component, after a first laser sensing unit senses that the molten steel reaches a preset liquid level height, an adjusting unit can be controlled according to the weight change of the tundish component detected by a first weight sensing unit so as to change the injection rate, and the molten steel of the tundish component is maintained at the preset liquid level height. In the smelting chamber, a liquid level control system is arranged to control whether the crucible assembly injects the molten steel into the tundish assembly and the rate of injecting the molten steel into the tundish assembly according to the state of the tundish assembly. Through the liquid level control system who sets up promptly, utilize the first laser induction unit that sets up in the tundish subassembly top, to the liquid level height detection of molten steel in the tundish subassembly, utilize laser irradiation to predetermine the position of liquid level height at the tundish subassembly, when waiting that the liquid level height in the tundish subassembly reaches and predetermines liquid level height, can be detected by the laser that first laser induction unit jetted out. And after the weight of the tundish component detected by the first weight sensing unit reaches the preset liquid level height, the speed of injecting the molten steel into the tundish component is adjusted by utilizing the adjusting unit connected with the crucible component through the weight change of the tundish component detected by the first weight sensing unit, so that the molten steel in the tundish component can be maintained at the preset liquid level height. Through the external first laser induction unit and with the cooperation of first weight induction unit and regulating unit, when can avoid introducing impurity, through measurement and the cooperation of higher precision for the molten steel in the tundish subassembly remains throughout at preset liquid level height, and control accuracy is higher, with better improvement powder quality, avoids stifled package.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts. In addition, in the drawings, like parts are denoted by like reference numerals, and the drawings are not drawn to actual scale.

FIG. 1 is a schematic diagram of a simple structure of a liquid level control system of an atomized gas pulverizing apparatus according to an embodiment of the present disclosure;

FIG. 2 shows an enlarged partial view of a portion of the tundish component of FIG. 1;

FIG. 3 shows a partial enlarged view of FIG. 2;

FIG. 4 shows a schematic diagram of a simple construction of a portion of the crucible assembly of FIG. 1;

FIG. 5 is a schematic diagram showing a simple structure of the laser sensing unit of FIG. 1;

fig. 6 shows a flowchart of a control method of a liquid level control system according to an embodiment of the present application.

Description of the reference numerals:

100. a smelting chamber; 1. a tundish component; 11. a mounting frame; 111. an opening; 12. a tundish body; 121-a nozzle; 122-preset liquid level height; 13. spraying a disc; 131. an ejection port; 2. a crucible assembly; 21. a crucible body; 22-a regulating unit; 23. a connecting rod; 3. a first laser sensing unit; 31. a heat exchanger; 32. a second heater; 4. a control unit; 41-laser induction module; 5. a first weight sensing unit; 51. a first weight sensor; 52. a water-cooling layer; 53. a thermal insulation layer; 54. a fourth port; 6. a second weight sensing unit; 7. a second laser sensing unit; 8. a mounting base; 9-rotating shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

FIG. 1 is a schematic diagram showing a simple structure of a liquid level control system of a powder preparing apparatus for gas atomization provided by an embodiment of the present application. FIG. 2 shows an enlarged view of a portion of the tundish component of FIG. 1. Fig. 3 shows a partial enlarged view of fig. 2. Fig. 4 shows a schematic view of a simple structure of a portion of the crucible assembly of fig. 1.

Referring to fig. 1 to 4, a liquid level control system is provided in an embodiment of the present application, and is used for a gas atomization powder making apparatus, a melting chamber 100 of the gas atomization powder making apparatus includes a tundish component 1 and a crucible component 2, the liquid level control system includes a first weight sensing unit 5 connected to the tundish component 1 and used for detecting the weight of the tundish component 1, and an adjusting unit 22 connected to the crucible component 2 and used for adjusting the rate of molten steel injection from the crucible component 2 to the tundish component 1; the first laser sensing unit 3 is arranged above the tundish component 1, the first laser sensing unit 3 is not in contact with the molten steel, and the first laser sensing unit 3 is used for sensing the molten steel injected into the tundish component 1 to a preset liquid level height 122.

It can be understood that the gas atomization powder making device also comprises an atomizing chamber connected with the smelting chamber 100, the tundish component 1 is communicated with the atomizing chamber, and the liquid metal flow flowing out of the tundish component 1 enters the atomizing chamber to be smashed into small liquid drops and is rapidly condensed to obtain metal powder. The liquid level control system in this application realizes the molten steel liquid level height in the automatically regulated tundish subassembly 1 among the smelting chamber 100 mainly used, makes the molten steel that crucible subassembly 2 poured into to tundish subassembly 1 maintain at preset liquid level height 122. The specific structure of other parts not related to and not related to the liquid level control system will not be described in detail.

Optionally, in the melting chamber 100, the crucible assembly 2 needs to be heated at a first position, so that after the crucible assembly 2 is heated to a set temperature to form the required molten steel, the crucible assembly 2 moves to a second position carrying the molten steel, and the molten steel is injected into the tundish assembly 1 at the second position. The second position is provided obliquely above the tundish assembly 1 so that the rate of molten steel injection into the tundish assembly 1 is controlled by the regulating unit 22. Referring to fig. 1, the crucible assembly 2 is disposed at the upper right of the tundish assembly 1, and it should be understood that the specific position of the crucible assembly 2 relative to the tundish assembly 1 may be different according to the reference object, the direction may also be different according to the manner of injecting molten steel into the tundish assembly 1 by the crucible assembly 2, or other factors may also cause different situations, so the second position may be adaptively adjusted according to specific situations, and is not limited thereto. For ease of description, the fluid level control system will be described in detail with this relative position in the following.

In the process of injecting the molten steel into the tundish assembly 1 by using the crucible assembly 2, after the first laser sensing unit 3 senses that the molten steel reaches the preset liquid level height 122, the adjusting unit 22 can be controlled to change the injection rate according to the weight change of the tundish assembly 1 detected by the first weight sensing unit 5, so that the molten steel of the tundish assembly 1 is maintained at the preset liquid level height 122. In the melting chamber 100, a liquid level control system is provided which is capable of controlling whether or not the crucible assembly 2 is to be filled with the molten steel into the tundish assembly 1, and controlling the rate at which the crucible assembly 2 is to be filled with the molten steel into the tundish assembly 1, in accordance with the state of the tundish assembly 1.

Namely, through the liquid level control system, the first laser sensing unit 3 arranged above the tundish component 1 is utilized to detect the liquid level height of the molten steel in the tundish component 1, laser is utilized to irradiate the position of the preset liquid level height 122 of the tundish component 1, and when the liquid level height in the tundish component 1 reaches the preset liquid level height 122, the laser emitted by the first laser sensing unit 3 can be detected. And after detecting that the preset liquid level height 122 is reached, the weight change of the tundish assembly 1 detected by the first weight sensing unit 5 is used for adjusting the speed of injecting the molten steel into the tundish assembly 1 by the adjusting unit 22 connected to the crucible assembly 2, so that the molten steel in the tundish assembly 1 can be maintained at the preset liquid level height 122. Through the external first laser induction unit 3 and with the cooperation of first weight induction unit 5 and regulating unit 22, when can avoid introducing impurity, through measurement and the cooperation of higher accuracy for molten steel in the tundish component 1 is maintained throughout and is predetermineeing liquid level height 122, and control accuracy is higher, with better improvement powder quality, avoids stifled package.

It is understood that the first laser sensing unit 3 may be, for example, a laser pointer, or may also be other detection devices capable of emitting laser for detection, and is not limited in particular herein.

In an alternative embodiment, when the molten steel in the tundish component 1 reaches the predetermined liquid level height 122, the weight measured by the first weight sensing unit 5 is a first predetermined weight, the first weight sensing unit 5 measures the weight of the tundish component 1 every first predetermined time interval, compares the measured weight with the first predetermined weight, and increases or decreases the speed of injecting the molten steel into the tundish component 1 according to the comparison result, wherein the first predetermined weight is the weight of the tundish component 1. The first preset weight measured by the first weight sensing unit when the acquired preset liquid level height 122 is reached is compared with the dynamic weight in the tundish component 1 in different time periods, so that the molten steel in the tundish component 1 can reach dynamic balance, and the liquid level height 122 can be maintained all the time, so that the powder quality is ensured while no inclusion is introduced.

Optionally, the first preset time may be set according to a requirement, for example, the first preset time may be 1s, 2s, 3s.

In an alternative embodiment, the adjusting unit 22 adjusts the crucible assembly 2 to inject the molten steel into the tundish assembly 1 at a first rate until the first laser sensing unit 3 detects that the molten steel is stopped at the preset liquid level 122, the adjusting unit 22 adjusts the crucible assembly 2 to inject the molten steel into the tundish assembly 1 at a second rate after a second preset time, the second rate is adjustable, the second rate is smaller than the first rate, the first weight sensing unit 5 compares the detected weight with the first preset weight when the weight of the tundish assembly 1 is measured every first preset time interval, if the detected weight is smaller than the first preset weight, the preset rate is increased on the basis of the second rate of the time interval as the second rate of the next time interval, and if the detected weight is larger than the first preset weight, the preset rate is decreased on the basis of the second rate of the time interval as the second rate of the next time interval. By using the adjusting unit 22, the crucible assembly 2 is controlled to inject the molten steel into the tundish assembly 1 at a first speed, so that the molten steel stops reaching the preset liquid level height 122 for the first time, and the adjusting unit 22 is restarted after a second preset time, so that the molten steel in the crucible assembly 2 is injected into the tundish assembly 1 at a second speed. Through this kind of setting to improve the stability and the controllability of annotating liquid, the first speed of pouring into for the first time can be relatively very fast, in order to avoid molten steel cooling, and the adjustable second speed of pouring into for the second time is used for the fine setting, and speed is relatively slow, in order to improve liquid level control precision and stability.

Optionally, the preset rate that is increased or decreased according to the result of comparing the measured weight with the first preset weight on the basis of the first rate may be set as a uniform fixed value, or may be set as a variable value, for example, the preset rate may be set as V1, and if the result of comparing the measured first time is smaller than the first preset weight, on the basis of the second rate of the time, the rate is increased by V1 to serve as the second rate of the second time; and if the comparison result of the second time is measured to be larger than the first preset weight, reducing the speed by V1 on the basis of the second speed of the time, taking the speed as the second speed of the third time, and so on. The preset rate V1 may be a range of values, or may also be a specific value, and may be adaptively adjusted according to an actual situation, which is not specifically limited herein.

It can be understood that the set first speed and second speed may be limited according to actual situations, and the first speed and second speed should be considered that the injected molten steel does not block the laser emitted by the first laser sensing unit 3 to the position corresponding to the preset liquid level height 122 in the moving process, and the specific speed is not specifically limited herein.

The following describes in detail a specific structure of a liquid level control system provided in an embodiment of the present application with reference to the accompanying drawings.

Referring to fig. 1 and 5, in the liquid level control system provided in the embodiment of the present application, the first laser sensing unit 3 is rotatably connected to the outside of the melting chamber 100, the first laser sensing unit 3 is located above the tundish component 1, a first preset included angle θ 2 is formed between the laser emitted by the first laser sensing unit 3 to the preset liquid level height 122 and the axis of the tundish component 1, and the first preset included angle θ 2 is adjustable. The first laser sensing unit 3 is disposed outside the melting chamber 100 to prevent damage to components, and can detect the height of molten steel inside by injecting laser into the tundish assembly 1 from above to a position corresponding to a predetermined liquid level height 122. And, set up first preset contained angle theta 2 between the laser that will first laser induction unit 3 launches and the axis of tundish subassembly 1 to in the laser can be established and corresponding the scale position of predetermineeing liquid level height 122 in tundish subassembly 1, and avoid crucible subassembly 2 at the in-process of pouring into the molten steel into with different rates to tundish subassembly 1, the easy condition that is sheltered from laser ray by the molten steel that appears, thereby guarantee that first laser induction unit 3 can maintain operating condition all the time, guarantee liquid level control system's stability.

First laser induction unit 3 sets up to adjustable to when predetermineeing liquid level height 122 that sets up in tundish subassembly 1 when different positions, can carry out the adaptability adjustment, when set up in tundish subassembly 1 to predetermine liquid level height 122 when first scale position promptly, need adjust first laser induction unit 3 first contained angle theta 2 of predetermineeing, so that the laser that makes its ejection can shine at first scale position, make the molten steel when reaching first scale, first laser induction unit 3 can sense through laser. The first scale may be specifically defined according to actual conditions, and may be, for example, a two-thirds position or a three-quarters position of the volume of the tundish component 1, which will not be described in detail herein.

Optionally, the direction in which the first laser sensing unit 3 is offset from the tundish assembly 1 by the first preset included angle θ 2 is the same as the direction in which the crucible assembly 2 is arranged, and the adjustable first preset included angle θ 2 is greater than 0 °, and the adjusted maximum included angle is related to the maximum rate of molten steel poured into the tundish assembly 1 from the crucible assembly 2, and can be adaptively adjusted according to actual conditions, and generally set to be not greater than 20 ° for the first preset included angle θ 2, which is not specifically limited herein.

It can be understood that when the crucible assembly 2 injects the molten steel into the tundish assembly 1, the molten steel and the axis of the tundish assembly 1 form a second preset included angle θ 3, the second preset included angle θ 3 is larger than the first preset included angle θ 2, and the molten steel does not interfere with the laser emitted by the first laser sensing unit 2. The second preset included angle θ 3 has a certain range according to different molten steel injection rates, the range can be 0 to 100 degrees, and in the specific case, an appropriate included angle is selected according to the relative position of the crucible assembly 2 and the tundish assembly 1, so long as the molten steel and the laser are ensured not to intersect, and no specific limitation is made herein.

Optionally, the first laser sensing unit 3 is rotatably connected to the top of the melting chamber 100 through a connecting member, the connecting member includes a mounting seat 8 and a rotating shaft 9 arranged on the mounting seat 8 and rotatably connected to the first laser sensing unit 3, a laser sensing module 41 is further arranged on the mounting seat 8, the laser sensing module 41 is electrically connected to the first laser sensing unit 3, and the laser sensing module 41 is electrically connected to the control unit 4, which is not described in detail herein.

In an alternative embodiment, the tundish assembly 1 comprises a mounting frame 11, an opening 111 is formed in the bottom of the mounting frame 11, a tundish body 12 is located on one side of the mounting frame 11, a containing cavity of the tundish body 12 is used for containing molten steel, and a nozzle 121 is formed in the bottom of the tundish body 12; the spraying plate 13 is located on one side, opposite to the tundish body 12, of the mounting frame 11, the tundish body 12 is connected with the spraying plate 13, the nozzle 121 is communicated with the spraying port 131 of the spraying plate 13, and the first weight sensing unit 5 is arranged on the spraying plate 13. Set up first weight induction unit 13 in the outside of spouting dish 13 for first weight induction unit 5 avoids introducing impurity with the molten steel contact when can measuring tundish component 1 weight, thereby guarantees the powder quality when guaranteeing higher weighing accuracy.

Optionally, the first weight sensing unit 5 is disposed on one side of the spraying plate 13 far away from the tundish body 12, and the first weight sensing unit 5 includes: a first weight sensor 51 for detecting the weight of the tundish body 12 containing molten steel, and a heat insulating layer 53 disposed between the spray tray 13 and the first weight sensor 51; and a water-cooling layer 52 provided between the heat insulating layer 53 and the first weight sensor 51. The arrangement of the heat insulation layer 53 and the water cooling layer 52 avoids the first weight sensor 51 from being damaged easily by heat, and the service life is prolonged.

In an alternative embodiment, the crucible assembly 2 comprises a crucible body 21 for containing molten steel; the crucible assembly comprises a rotating mechanism, a crucible body 21 is rotatably connected to the smelting chamber 100, an adjusting unit 22 is arranged on the rotating mechanism, a second weight sensing unit 6 is arranged on the rotating mechanism and used for detecting the weight of the crucible body 21, the second weight sensing unit 6 is electrically connected with the adjusting unit 22, the crucible body 21 has a preset weight, and when the second weight sensing unit 6 detects that the weight of the crucible body 21 is reduced to the preset weight, the adjusting unit 22 adjusts the crucible assembly 2 to stop injecting the molten steel into the tundish assembly 1. The second weight sensing unit 6 is used for detecting the weight of the molten steel in the crucible assembly 2, and when the weight of the crucible assembly 2 is detected to be reduced to be larger than 3KG of the weight of the crucible assembly 2 (a preferable scheme of the preset weight, for example, the weight of the crucible assembly can be larger than 4KG, 5KG and the like, which is not specifically limited), the pouring of the molten steel into the tundish assembly 1 is controlled to stop, and the liquid level control system is closed. So as to avoid the influence on the powder quality caused by the mixing of the molten steel containing more oxide films.

In an optional embodiment, the liquid level control system further comprises a second laser sensing unit 7, which is arranged above the tundish component 1, wherein the second laser sensing unit 7 is used for sensing the molten steel injected into the tundish component 1 to an early warning liquid level height, and the early warning liquid level height is located above the preset liquid level height 122. The molten steel liquid level in the tundish component 1 is too high under the condition of failure detection and the like, so that the first laser sensing unit 3 is prevented from alarming or forcibly stopping, the molten steel is prevented from overflowing, and the safety performance is ensured. The second laser sensing unit 7 can be rotatably connected to the mounting seat 8, so that the laser emitted by the second laser sensing unit 7 into the tundish component 1 can be adjusted relative to a third preset included angle theta 1 of the tundish component 1, the third preset included angle theta 1 is smaller than the first preset included angle theta 2, and the laser can be adaptively adjusted according to the specific setting height of the corresponding first scale without specific limitation.

In an optional embodiment, the liquid level control system further comprises a control unit 4 electrically connected to the first weight sensing unit 5, the second weight sensing unit 6, the adjusting unit 22, the rotating mechanism, and the first laser sensing unit 3 and the second laser sensing unit 7, respectively. The control unit 4 is used for acquiring relevant detection information and sending an instruction to a corresponding component according to the acquired information so as to control the molten steel in the tundish component 1 to be always maintained at a preset liquid level height.

Optionally, the control unit 4 is provided with a database module, which can automatically adjust the relevant settings according to the history record, so as to ensure that the liquid level control system can be in the optimal operating state. Moreover, the corresponding weight sensing units are provided with protection measures free from electromagnetic interference, which are not described in detail herein.

The present application further provides a gas atomization powder-making device, which comprises the liquid level control system described in the above, and detailed description is omitted here.

For the liquid level control system and the gas atomization powder making device described above, the present application also provides a control method of the liquid level control system, referring to fig. 6, the control method specifically includes:

after the first laser sensing unit 3 senses that the molten steel reaches the preset liquid level height 122, the adjusting unit 22 is controlled to change the injection rate according to the weight change of the tundish component 1 detected by the first weight sensing unit 5, so that the molten steel in the tundish component 1 is maintained at the preset liquid level height 122.

Whether the molten steel of the tundish component 1 reaches the preset liquid level height 122 or not is detected through the arranged laser by the external first laser sensing unit 3, after the molten steel reaches the preset liquid level height 122, the weight change of the tundish component 1 is detected through the first weight sensing unit 5, the speed of injecting the molten steel into the tundish component 1 is adjusted by the adjusting unit 22 connected to the crucible component 2, and the molten steel in the tundish component 1 can be maintained at the preset liquid level height 122. Through external first laser induction unit 3 and with first weight induction unit 5 and the cooperation of regulating unit 22, when can avoid introducing impurity, through measurement and the cooperation of higher accuracy for molten steel in the tundish component 1 maintains throughout and predetermines liquid level height 122, and control accuracy is higher, with better improvement powder quality, avoids stifled package.

In an optional embodiment, after the first laser sensing unit 3 senses that the molten steel reaches the preset liquid level height 122, the control method further includes:

the first weight sensing unit 5 is controlled to measure the weight of the tundish component 1 once every first preset time, the measured weight is compared with the first preset weight, and the adjusting unit 22 is controlled to increase or decrease the rate of injecting the molten steel into the tundish component 1 according to the comparison result.

The method specifically comprises the following steps:

s101, controlling the adjusting unit 22 to enable the crucible assembly 2 to inject molten steel into the tundish assembly 1 at a first speed.

S102, controlling the first laser sensing unit 3 to sense the molten steel of the tundish component 1 to reach the preset liquid level height 122, and stopping injecting the molten steel into the tundish component 1.

And S103, controlling the weight of the tundish component 1 measured by the first weight sensing unit 5 to be a first preset weight.

S104, after a second preset time, controlling the adjusting unit 22 to enable the crucible assembly 2 to inject molten steel into the tundish assembly 1 at a second speed, wherein the second speed is adjustable and is smaller than the first speed,

controlling the first weight sensing unit 5 to measure the weight of the tundish component 1 every first preset time interval, comparing the measured weight with the first preset weight, if the measured weight is smaller than the first preset weight, increasing the preset rate on the basis of the second rate of the time interval as the second rate of the next time interval, and if the measured weight is larger than the first preset weight, decreasing the preset rate on the basis of the second rate of the time interval as the second rate of the next time interval.

After the above steps are performed, the control method further includes: when the second weight sensing unit 6 detects that the weight of the crucible assembly 1 is reduced to a preset weight, the control adjusting unit 22 adjusts the crucible assembly 2 to stop the injection of the molten steel into the tundish assembly 1.

It is understood that, in the above method steps, the specific conditions of the related components, the matching relations, the further definition and the like can be referred to the specific definition in the liquid level control system, and are not described in detail herein.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It should be readily understood that "on 8230" \ 8230on "," on 82303030, and "on 82308230; \ 8230on" \ 8230, and "on 8230;" on 8230, should be interpreted in the broadest sense in this disclosure, such that "on 8230;" on not only means "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above 8230or" above 8230 "\8230"; not only includes the meaning of "above something" or "above" but also includes the meaning of "above something" or "above" with no intervening features or layers therebetween (i.e., directly on something).

Furthermore, spatially relative terms, such as "below," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a liquid level control system for gas atomization powder process equipment, gas atomization powder process equipment's smelting chamber includes tundish subassembly and crucible subassembly, its characterized in that, liquid level control system includes:

a first laser sensing unit disposed above the tundish component, the first laser sensing unit being in non-contact with the molten steel, the first laser sensing unit being configured to sense that the molten steel poured into the tundish component reaches a predetermined liquid level height,

2. The liquid level control system of claim 1, wherein the weight measured by the first weight sensing unit is a first predetermined weight when the molten steel in the tundish component reaches the predetermined liquid level height,

3. The liquid level control system of claim 2, wherein the adjustment unit adjusts the crucible assembly to inject the molten steel into the tundish assembly at a first rate until the first laser sensing unit detects that the molten steel reaches the preset liquid level height, the adjustment unit adjusts the crucible assembly to inject the molten steel into the tundish assembly at a second rate after a second preset time, the second rate is adjustable, and the second rate is less than the first rate,

4. The liquid level control system of any one of claims 1-3, wherein the first laser sensing unit is rotatably connected to an exterior of the melting chamber, the first laser sensing unit is located above the tundish assembly,

5. The liquid level control system of claim 4, wherein when the crucible assembly injects the molten steel into the tundish assembly, a second preset included angle is formed between the molten steel and an axis of the tundish assembly, the second preset included angle is larger than the first preset included angle, and the molten steel does not interfere with laser emitted by the first laser sensing unit.

6. A liquid level control system as claimed in any one of claims 1 to 3, wherein the tundish assembly comprises:

the bottom of the mounting rack is provided with an opening,

7. The fluid level control system of claim 6, wherein the first weight sensing unit is disposed on a side of the spray tray away from the tundish body, the first weight sensing unit comprising:

8. The fluid level control system of any one of claims 1-3, wherein the crucible assembly comprises:

the crucible body is used for containing molten steel;

9. The liquid level control system according to any one of claims 1 to 3, further comprising a second laser sensing unit disposed above the tundish component, the second laser sensing unit being configured to sense the molten steel poured into the tundish component to an early warning liquid level height, the early warning liquid level height being above the preset liquid level height.

10. The fluid level control system according to any one of claims 1-3, further comprising a control unit electrically connected to the first weight sensing unit, the regulating unit and the first laser sensing unit, respectively.

11. A gas-atomised powder-making apparatus comprising a liquid level control system as claimed in any one of claims 1 to 10.

12. A liquid level control method is used for a liquid level control system of a gas atomization powder making device, and is characterized in that the liquid level control system comprises:

the control method comprises the following steps:

13. The method of claim 12, wherein the tundish assembly has a first predetermined weight when the molten steel in the tundish assembly reaches the predetermined liquid level,

14. The control method according to claim 12, characterized by specifically comprising:

controlling the first weight sensing unit to measure the weight of the tundish component to be a first preset weight;

the method comprises the steps of controlling the first weight sensing unit to measure the weight of the tundish component once every a first preset time interval, comparing the measured weight with the first preset weight, if the measured weight is smaller than the first preset weight, increasing a preset rate on the basis of the second rate of the time interval to serve as the second rate of the next time interval, and if the measured weight is larger than the first preset weight, decreasing the preset rate on the basis of the second rate of the time interval to serve as the second rate of the next time interval.

15. The control method of claim 12, wherein the level control system further comprises a second weight sensing unit disposed in the crucible assembly, the control method further comprising: