High-precision control device for continuous casting powder

Abstract

The utility model discloses a high-precision control device for continuous casting powder, which comprises a hopper and a vehicle body, a spiral auger is rotatably connected in the hopper, and the bottom end of the spiral auger extends to the outer side of the hopper from an output port of the hopper. Continuous casting covering slag in the hopper is evenly conveyed through the spiral auger, so that the discharging amount is accurately controlled, and under the actual working condition, according to the particle size of the continuous casting covering slag and the working efficiency requirement, the first adjusting mechanism is adjusted, the inclination of the channel steel is changed, and the channel steel is vibrated in cooperation with the vibration motor and the elastic piece; the casting powder is vibrated and slowly falls on the horizontally-arranged weighing plate in a high-frequency small-amplitude vibration mode, the weight value of the continuous casting powder on the weighing plate can be obtained by sensing the mass variation of the weighing plate through the weight sensor, when the weight value reaches a set value, the gradient of the channel steel is reduced, meanwhile, a vibration motor switch is turned off, and blanking is stopped; accurately measured materials are obtained, and the material taking precision is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical continuous casting, in particular to a high-precision control device for continuous casting powder. Background Technique

[0002] At present, the continuous casting process in the metallurgical industry basically adopts the protected casting mode. In the process of pouring the powder, the powder is a crucial link. The physical and chemical properties, addition amount, etc. of the powder are closely related to the quality of the continuous casting billet of its products. If the addition amount of the powder is too large, the phenomenon of too thick sintered layer will occur on the molten steel surface. If the addition amount of the powder is too small, the thickness of the molten slag layer on the molten steel surface will be insufficient, and defects such as slag entrainment are likely to occur.

[0003] After years of development and continuous improvement by scientific and technological personnel in the metallurgical industry, the addition of the powder has changed from the most primitive manual addition to the current common continuous control (motor rotation) method. With the progress of science and technology and the increasing requirements for product quality, this method has gradually been unable to meet the requirements of further high-quality development at present.

[0004] Therefore, it is necessary to develop a high-precision control device for continuous casting powder. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a high-precision control device for continuous casting powder aiming at the deficiencies of the above-mentioned prior art. According to the particle size of the continuous casting powder and the requirements of working efficiency, the first adjustment mechanism is adjusted to change the inclination of the channel steel, and the channel steel is vibrated by cooperating with the vibration motor and the elastic member, and the powder is slowly vibrated and dropped on the horizontally arranged weighing plate in the way of high-frequency and small-amplitude vibration. By using the weight sensor to sense the mass change of the weighing plate, the weight value of the continuous casting powder on the weighing plate can be obtained, so as to solve the technical problems proposed in the background technique.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0007] A high-precision control device for continuous casting powder, comprising a hopper and a vehicle body. A spiral auger is rotatably connected inside the hopper, and the bottom end of the spiral auger extends from the output port of the hopper to the outside thereof. A driving motor is fixedly connected to the outer wall of the hopper, and the output shaft of the driving motor drives the spiral auger through a steering gear;

[0008] A channel steel for installing an elastic member is arranged above the vehicle body. A vibration motor is installed on the channel steel, and a first adjustment mechanism is installed between the elastic member of the vehicle body and the channel steel for adjusting the inclination of the channel steel;

[0009] A mounting frame is towed at the front end of the vehicle body. A weighing mechanism is hingedly arranged at the top of the mounting frame. A second adjusting mechanism is arranged between the mounting frame and the weighing mechanism for adjusting the inclination of the weighing mechanism;

[0010] A hopper plate is arranged on one side of the weighing mechanism. A material pushing component is arranged on one side of the hopper plate for pushing down the accurately weighed material.

[0011] Preferably, the channel steel is arranged in a pocket-like structure, and a V-shaped material trough is opened at the top of the channel steel. One end of the V-shaped material trough penetrates through the side wall of the channel steel, and the end of the V-shaped material trough penetrating through the side wall of the channel steel is arranged as a reduced opening structure. A fence plate is arranged at the top of the channel steel and outside the V-shaped material trough.

[0012] Preferably, the elastic member is arranged as a spring, and cylinder sleeves are fixedly sleeved at both end parts of the spring;

[0013] The number of the springs is three. One spring is located directly below the reduced opening structure, and the other two springs are symmetrically distributed on both sides of the bottom wall of the channel steel.

[0014] Preferably, the first adjusting mechanism includes a first hydraulic cylinder and two second hydraulic cylinders. The first hydraulic cylinder and the second hydraulic cylinders are both powered by a hydraulic mechanism. The output end of the first hydraulic cylinder is hinged to the bottom cylinder sleeve of the spring located directly below the reduced opening structure, and the other end is fixed on the vehicle body. The output end of the second hydraulic cylinder is hinged to the bottom cylinder sleeves of the other two springs, and the other end is hingedly arranged on the vehicle body through a hinge.

[0015] Preferably, the weighing mechanism includes a bearing plate and a weighing plate. The bearing plate and the mounting frame are hinged through a hinge, and the bearing plate is placed flat on the top of the mounting frame in the initial state. The weighing plate is arranged parallel to the upper part of the bearing plate, and a weight sensor is arranged between the weighing plate and the bearing plate for sensing the change amount of the mass of the weighing plate.

[0016] Preferably, the second adjusting mechanism includes a first electric push rod. The output end and the bottom end of the first electric push rod are respectively hinged to the bearing plate and the mounting frame;

[0017] Sliding rails are fixedly connected to both side walls of the bearing plate, and sliders are slidably connected to the sliding rails. An arc-shaped chute piece is integrally arranged at the bottom end of the slider. Limit pins are threadedly connected to the top parts of both sides of the mounting frame, and the limit pins are slidably matched with the arc-shaped chute piece.

[0018] Preferably, the material pushing assembly includes a second electric push rod, which is fixed to one side of the bearing plate through a ferrule, and the output end of the second electric push rod is drivingly connected with a scraper. The hopper plate is installed on the bearing plate and extends to the top of the weighing plate, and the side wall of the hopper plate is slidably connected with the side wall of the weighing plate. The two side walls of the scraper are respectively slidably matched with the hopper plate and the bearing plate, and in the initial state, the scraper is not in contact with the hopper plate and the weighing plate.

[0019] Preferably, the continuous casting mold powder high-precision control device further includes a touch display screen. The connection end of the touch display screen is electrically connected with a single-chip microcomputer. The input end and the output end of the single-chip microcomputer are respectively electrically connected with an A / D converter and a D / A converter, and the weight sensor is electrically connected with the A / D converter. The drive motor, the vibration motor, the hydraulic mechanism, the first electric push rod and the second electric push rod are all electrically connected with the D / A converter.

[0020] Preferably, a plurality of struts distributed in a ring are installed inside the hopper, and a sealing box is jointly connected between the plurality of struts for storing and protecting the steering gear, and the top end of the spiral auger penetrates through the sealing box and is rotatably connected with the through hole.

[0021] Preferably, a cover plate is hinged to the top of the hopper, a sealing gasket is arranged at the contact part between the cover plate and the hopper, and a feed inlet is communicated with the cover plate.

[0022] The utility model has the following beneficial effects:

[0023] 1. The continuous casting mold powder in the hopper is evenly conveyed by the spiral auger to facilitate accurate control of the feeding amount. Under actual working conditions, according to the particle size of the continuous casting mold powder and the working efficiency requirements, the first adjusting mechanism is adjusted to change the inclination of the channel steel. As a transmission channel, the vibration motor and the elastic member are cooperated to vibrate the channel steel, and the mold powder is slowly vibrated and dropped on the horizontally arranged weighing plate in a high-frequency and small-amplitude vibration manner. By using the weight sensor to sense the mass change of the weighing plate, the weight value of the continuous casting mold powder on the weighing plate can be obtained. When the weight value reaches the set value, the inclination of the channel steel is reduced, and at the same time, the vibration motor switch is turned off to stop the feeding, and the accurately measured material is obtained, and the feeding accuracy is significantly improved;

[0024] 2. The single-chip microcomputer, the touch display screen, the weight sensor, the drive motor, the vibration motor, the hydraulic mechanism, the first electric push rod and the second electric push rod and other structures are electrically connected to realize the high-precision control of the continuous casting mold powder under automatic working conditions, without manual operation, reducing the labor intensity and the measurement error in manual operation, with a high degree of intelligence and significantly improved work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall structural schematic diagram provided by the utility model;

[0026] Figure 2 It is a cross-sectional view of the hopper in the present utility model;

[0027] Figure 3 It is a first perspective stereogram of the channel steel and its connection structure in the present utility model;

[0028] Figure 4 It is a second perspective stereogram of the channel steel and its connection structure in the present utility model;

[0029] Figure 5 It is a right view of the channel steel and its connection structure in the present utility model;

[0030] Figure 6 It is a first perspective stereogram of the combined structure of the weighing mechanism, the second adjusting mechanism and the material pushing assembly in the present utility model;

[0031] Figure 7 It is a second perspective stereogram of the combined structure of the weighing mechanism, the second adjusting mechanism and the material pushing assembly in the present utility model;

[0032] Figure 8 It is the system control flow chart of the intelligent control system provided by the present utility model.

[0033] Among them are:

[0034] Hopper - 1; vehicle body - 2; spiral auger - 3; drive motor - 4; steering gear - 5; channel steel - 6; vibration motor - 7; first adjusting mechanism - 8; mounting bracket - 9; weighing mechanism - 10; second adjusting mechanism - 11; hopper plate - 12; material pushing assembly - 13; V-shaped trough - 14; fence plate - 15; spring - 16; barrel sleeve - 17; touch display screen - 18; single-chip microcomputer - 19; support rod - 20; sealed box - 21; cover plate - 22; feed inlet - 23;

[0035] First hydraulic cylinder - 801; second hydraulic cylinder - 802; hydraulic mechanism - 803;

[0036] Carrying plate - 101; weighing plate - 102; weight sensor - 103;

[0037] First electric push rod - 111; slide rail - 112; slider - 113; arc-shaped chute piece - 114; limit pin - 115;

[0038] Second electric push rod - 131; ferrule - 132; scraper - 133. Specific embodiments

[0039] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present utility model. The specific dimensions adopted in this embodiment are only for illustrating the technical solution by way of example and do not limit the protection scope of the present utility model.

[0041] As Figure 1-8 shown, a high-precision control device for continuous casting powder includes a hopper 1 and a vehicle body 2. A spiral auger 3 is rotatably connected inside the hopper 1, and the bottom end of the spiral auger 3 extends from the output port of the hopper 1 to the outside thereof. A driving motor 4 is fixedly connected to the outer wall of the hopper 1, and the output shaft of the driving motor 4 drives the spiral auger 3 through a steering gear 5. The continuous casting powder is agitated by the spiral auger 3 to uniformly convey the material, facilitating the precise control of the feeding amount.

[0042] Above the vehicle body 2, there is a channel steel 6 for installing elastic members. Specifically, the channel steel 6 is arranged in a pocket-like structure, and a V-shaped material groove 14 is opened at the top of the channel steel 6. One end of the V-shaped material groove 14 penetrates the side wall of the channel steel 6, and the end of the V-shaped material groove 14 penetrating the side wall of the channel steel 6 is arranged in a reduced opening structure. A fence plate 15 is arranged at the top of the channel steel 6 and outside the V-shaped material groove 14. When the material in the V-shaped material groove 14 opened on the pocket-like channel steel 6 falls, it has the functions of aggregating the material and reducing the speed, and cooperating with the fence plate 15 to prevent the material from spilling, which can improve the weighing accuracy of the material. A vibration motor 7 is installed on the channel steel 6, and the vibration motor 7 cooperates with the elastic members to enable the channel steel 6 to vibrate, and the vibration amplitude and frequency of the vibration motor 7 can be adjusted to be applicable to powders and steel grades with different physical and chemical properties, so as to be able to slowly shake off the material in the V-shaped material groove 14. Moreover, a first adjustment mechanism 8 is installed between the vehicle body 2 and the elastic members of the channel steel 6 for adjusting the inclination of the channel steel 6. According to the particle size of the continuous casting powder and the working efficiency requirements, the inclination of the channel steel 6 is adjusted, thereby realizing the control of the feeding speed of the continuous casting powder.

[0043] As a preferred embodiment of the elastic member in the present utility model:

[0044] The elastic member is set as a spring 16, and barrel sleeves 17 are fixedly sleeved on both ends of the spring 16. Specifically, the number of springs 16 is set to three, one of the springs 16 is located directly below the reduced opening structure, and the other two springs 16 are symmetrically distributed on both sides of the bottom wall of the channel steel 6.

[0045] At the front end of the vehicle body 2, there is a mounting bracket 9 being towed. At the top of the mounting bracket 9, a weighing mechanism 10 is hingedly arranged. Between the mounting bracket 9 and the weighing mechanism 10, a second adjusting mechanism 11 is provided for adjusting the inclination of the weighing mechanism 10; when the weighing mechanism 10 receives the material, it remains in a horizontal state, and real-time weighing is carried out at this time. After the weighing is completed, the second adjusting mechanism 11 is controlled to make the weighing mechanism 10 inclined to gather the material, and then the material is taken off;

[0046] On one side of the weighing mechanism 10, there is a scoop plate 12. On one side of the scoop plate 12, a material pushing component 13 is provided for pushing down the accurately weighed material;

[0047] As a preferred embodiment of the first adjusting mechanism 8 in the present utility model:

[0048] The first adjusting mechanism 8 includes a first hydraulic cylinder 801 and two second hydraulic cylinders 802. Both the first hydraulic cylinder 801 and the second hydraulic cylinder 802 are powered by a hydraulic mechanism 803. The output end of the first hydraulic cylinder 801 is hinged to the bottom cylinder sleeve 17 of the spring 16 directly below the necking structure, and the other end is fixed on the vehicle body 2. The output end of the second hydraulic cylinder 802 is hinged to the bottom cylinder sleeves 17 of the other two springs 16, and the other end is hingedly arranged on the vehicle body 2 through a hinge;

[0049] As a preferred embodiment of the weighing mechanism 10 in the present utility model:

[0050] The weighing mechanism 10 includes a bearing plate 101 and a weighing plate 102. The bearing plate 101 is hingedly connected to the mounting bracket 9 through a hinge, and the bearing plate 101 lies flat on the top of the mounting bracket 9 in the initial state. The weighing plate 102 is arranged parallel to the upper side of the bearing plate 101, and a weight sensor 103 is arranged between the weighing plate 102 and the bearing plate 101 for sensing the mass change of the weighing plate 102;

[0051] As a preferred embodiment of the second adjusting mechanism 11 in the present utility model:

[0052] The second adjusting mechanism 11 includes a first electric push rod 111. The output end and the bottom end of the first electric push rod 111 are respectively hinged to the bearing plate 101 and the mounting bracket 9;

[0053] On both side walls of the bearing plate 101, slide rails 112 are fixedly connected, and sliders 113 are slidably connected to the slide rails 112. An arc-shaped chute piece 114 is integrally arranged at the bottom end of the slider 113. Limit pins 115 are threadedly connected to the top of both sides of the mounting bracket 9, and the limit pins 115 are slidably matched with the arc-shaped chute piece 114;

[0054] As a preferred embodiment of the material pushing component 13 in the present utility model:

[0055] The pusher assembly 13 includes a second electric push rod 131. The second electric push rod 131 is fixed to one side of the bearing plate 101 through a ferrule 132. The output end of the second electric push rod 131 is drivingly connected with a scraper 133. The hopper plate 12 is installed on the bearing plate 101 and extends to the top of the weighing plate 102. The side wall of the hopper plate 12 is slidably connected to the side wall of the weighing plate 102. The two side walls of the scraper 133 are respectively in sliding fit with the hopper plate 12 and the bearing plate 101. In the initial state, the scraper 133 does not contact the hopper plate 12 and the weighing plate 102. During weighing, the hopper plate 12 and the scraper 133 will not affect the accurate measurement of the weight sensor 103.

[0056] As Figure 8 shown, the continuous casting mold powder high-precision control device further includes a touch display screen 18. The connection end of the touch display screen 18 is electrically connected to a single-chip microcomputer 19. The input end and the output end of the single-chip microcomputer 19 are respectively electrically connected to an A / D converter and a D / A converter. The weight sensor 103 is electrically connected to the A / D converter. The drive motor 4, the vibration motor 7, the hydraulic mechanism 803, the first electric push rod 111 and the second electric push rod 131 are all electrically connected to the D / A converter.

[0057] Specifically, a plurality of support rods 20 are installed inside the hopper 1 in a circumferential distribution. A sealing box 21 is connected among the plurality of support rods 20 for storing and protecting the steering gear 5. The top end of the spiral auger 3 penetrates through the sealing box 21 and is rotationally connected with the through hole, avoiding the influence of the transmission structure of the spiral auger 3 by the material, improving the working stability of the device and prolonging the service life of the device.

[0058] Specifically, a cover plate 22 is hinged to the top of the hopper 1. A sealing gasket is arranged at the contact part between the cover plate 22 and the hopper 1. A feed inlet 23 is communicated with the cover plate 22, which is convenient for replenishing materials and can prevent material leakage and dust problems.

[0059] When the control device provided by the present utility model is in use, continuous casting mold powder is injected into the hopper 1; the drive motor 4 is controlled to work. Its output shaft drives the spiral auger 3 through the steering gear 5 to convey the continuous casting mold powder out of the hopper 1 and accurately fall into the V-shaped trough 14 on the channel steel 6. According to the particle size of the continuous casting mold powder and the working efficiency requirements, the heights of the first hydraulic cylinder 801 and the two second hydraulic cylinders 802 are adjusted to change the inclination of the channel steel 6. The vibration motor 7 and the elastic member are cooperated to make the channel steel 6 vibrate, so as to slowly shake off the material. The mold powder is vibrated onto the horizontally arranged weighing plate 102 by means of high-frequency small-amplitude vibration. The weight sensor 103 is used to sense the mass change of the weighing plate 102, and the weight value of the continuous casting mold powder on the weighing plate 102 can be obtained. When the weight value reaches the set value, the inclination of the channel steel 6 is reduced, and at the same time, the switch of the vibration motor 7 is turned off to stop the feeding; the accurately measured material is collected.

[0060] This device is tested on the continuous caster in the second electric furnace workshop. It can clearly understand the consumption of the mold powder under different continuous casting states and different steel grades. Combining with the changes in on-site quality, it can give the control indexes for the addition of the mold powder applicable to different steel grades and different continuous casting states.

[0061] The above has made a detailed description of the implementation mode of the present utility model in conjunction with the attached drawings. However, the present utility model is not limited to the described implementation mode. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these implementation modes still fall within the protection scope of the present utility model.

Claims

1. A high-precision control device for continuous casting powder, comprising a hopper (1) and a vehicle body (2), characterized in that: A spiral auger (3) is rotatably connected inside the hopper (1), and the bottom end of the spiral auger (3) extends from the output port of the hopper (1) to the outside thereof. A driving motor (4) is fixedly connected to the outer wall of the hopper (1), and the output shaft of the driving motor (4) drives the spiral auger (3) through a steering gear (5); Above the vehicle body (2), there is a channel steel (6) for installing elastic members. A vibration motor (7) is installed on the channel steel (6), and a first adjusting mechanism (8) is installed between the elastic members of the vehicle body (2) and the channel steel (6) for adjusting the inclination of the channel steel (6); The front end of the vehicle body (2) is towed with a mounting bracket (9). The top end of the mounting bracket (9) is hingedly provided with a weighing mechanism (10). A second adjusting mechanism (11) is arranged between the mounting bracket (9) and the weighing mechanism (10) for adjusting the inclination of the weighing mechanism (10); On one side of the weighing mechanism (10), there is a hopper plate (12). On one side of the hopper plate (12), there is a material pushing assembly (13) for pushing down the accurately weighed materials.

2. The high-precision control device for continuous casting powder according to claim 1, wherein: The channel steel (6) is arranged in a pocket-shaped structure, and a V-shaped material trough (14) is opened at the top of the channel steel (6). One end of the V-shaped material trough (14) penetrates the side wall of the channel steel (6), and the end of the V-shaped material trough (14) penetrating the side wall of the channel steel (6) is arranged in a necking structure. A fence plate (15) is arranged at the top of the channel steel (6) and outside the V-shaped material trough (14); 3. The high-precision control device for continuous casting powder according to claim 2, characterized in that: The elastic member is a spring (16), and both ends of the spring (16) are fixedly sleeved with cylinder sleeves (17); The number of the springs (16) is three. One spring (16) is located directly below the necking structure, and the other two springs (16) are symmetrically distributed on both sides of the bottom wall of the channel steel (6).

4. The high-precision control device for continuous casting mold powder according to claim 1, characterized in that: The first adjusting mechanism (8) includes a first hydraulic cylinder (801) and two second hydraulic cylinders (802). The first hydraulic cylinder (801) and the second hydraulic cylinders (802) are both powered by a hydraulic mechanism (803). The output end of the first hydraulic cylinder (801) is hinged to the bottom cylinder sleeve (17) of the spring (16) located directly below the necking structure, and the other end is fixed on the vehicle body (2). The output end of the second hydraulic cylinder (802) is hinged to the bottom cylinder sleeves (17) of the other two springs (16), and the other end is hingedly arranged on the vehicle body (2) through a hinge.

5. The high-precision control device for continuous casting powder according to claim 4, characterized in that: The weighing mechanism (10) includes a bearing plate (101) and a weighing plate (102). The bearing plate (101) is hingedly connected to the mounting bracket (9) through a hinge, and the bearing plate (101) is initially placed flat on the top end of the mounting bracket (9). The weighing plate (102) is arranged parallel to the upper side of the bearing plate (101), and a weight sensor (103) is arranged between the weighing plate (102) and the bearing plate (101) for sensing the mass change of the weighing plate (102).

6. The high-precision control device for continuous casting mold powder according to claim 5, characterized in that: The second adjusting mechanism (11) includes a first electric push rod (111). The output end and the bottom end of the first electric push rod (111) are respectively hinged to the bearing plate (101) and the mounting bracket (9); On both side walls of the bearing plate (101), slide rails (112) are fixedly connected, and a slider (113) is slidably connected to the slide rails (112). An arc-shaped chute piece (114) is integrally provided at the bottom end of the slider (113). At the top of both sides of the mounting frame (9), limit pins (115) are threadedly connected, and the limit pins (115) are slidably engaged with the arc-shaped chute piece (114).

7. The high-precision control device for continuous casting powder according to claim 6, wherein: The material pushing assembly (13) includes a second electric push rod (131). The second electric push rod (131) is fixed to one side of the bearing plate (101) through a ferrule (132), and the output end of the second electric push rod (131) is drivingly connected to a scraping plate (133). The hopper plate (12) is installed on the bearing plate (101) and extends to the top of the weighing plate (102). A sliding connection is provided between the side wall of the hopper plate (12) and the side wall of the weighing plate (102). The two side walls of the scraping plate (133) are respectively slidably engaged with the hopper plate (12) and the bearing plate (101). And in the initial state, the scraping plate (133) is not in contact with the hopper plate (12) and the weighing plate (102).

8. The high-precision control device for continuous casting powder according to claim 7, wherein: It further includes a touch display screen (18). The connection end of the touch display screen (18) is electrically connected to a single-chip microcomputer (19). The input end and the output end of the single-chip microcomputer (19) are respectively electrically connected to an A / D converter and a D / A converter. And the weight sensor (103) is electrically connected to the A / D converter. The drive motor (4), the vibration motor (7), the hydraulic mechanism (803), the first electric push rod (111) and the second electric push rod (131) are all electrically connected to the D / A converter.

9. The high-precision control device for continuous casting powder according to claim 1, wherein: A plurality of support rods (20) distributed in a surrounding manner are installed inside the hopper (1), and a sealing box (21) is commonly connected between the plurality of support rods (20) for receiving and protecting the steering gear (5). And the top end of the spiral auger (3) penetrates through the sealing box (21) and is rotationally connected to the through hole.

10. A high-precision control device for continuous casting powder, characterized in that: A cover plate (22) is hinged to the top of the hopper (1). A sealing gasket is provided at the contact part between the cover plate (22) and the hopper (1). An inlet (23) is communicated with the cover plate (22).

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