An intelligent sand adding system for ladle hot repair

Abstract

The present invention provides an intelligent sand adding system for hot repair of ladles, comprising: a fixed storage device for drainage sand, including a fixed platform and a sand storage component; a mobile sand adding device, including a mobile trolley, a sand adding component, a sand adding bucket and a lifting mechanism, wherein the mobile trolley can move between a sand receiving position and a sand adding position; the sand adding component is arranged on the mobile trolley and is used for adding sand into the sand adding bucket; the lifting mechanism is arranged on the mobile trolley and is used for driving the sand adding bucket to lift and lower, so that the sand adding bucket can discharge the drainage sand to the water inlet at the bottom of the ladle; a control device, configured to control the mobile trolley to move from the sand receiving position to the sand adding position according to an instruction. When it is determined that the mobile trolley reaches the sand adding position, the control device controls the sand adding component to feed a fixed amount of drainage sand into the sand adding bucket, and controls the lifting mechanism to drive the sand adding bucket to descend to a low position, so as to discharge the drainage sand in the sand adding bucket to the water inlet of the ladle. The present invention can automatically add drainage sand, realize full-automatic operation, and reduce the workload of personnel.

Description

Technical Field

[0001] The present invention relates to an intelligent sand adding system for ladle hot repair, belonging to the technical field of the metallurgical industry. Background Art

[0002] Putting drainage sand to protect the nozzle is an indispensable step in the current continuous casting production process of steelmaking. After the ladle completes the pouring task, the sliding nozzle mechanism at the bottom needs to be maintained: checking the nozzle mechanism, replacing the slide bricks, replacing the nozzle mechanism, and then adding drainage sand to the maintained nozzle for anti-oxidation protection of the nozzle to prepare for continuous casting or pouring of the next ladle of molten steel. At present, most of the addition of drainage sand is manual. The drainage sand adding device is arranged on a mobile trolley or a platform at a certain height on the ground. When drainage sand needs to be added, the operator manually operates the mobile trolley to travel to the working position, so that the platform where the sand adding device is placed is above the ladle, or the ladle car travels to the position below the sand adding device platform, so that the ladle is below the sand adding device. Then the operator walks to the sand adding platform and manually operates the sand adding device to make the lower part of the sand adding pipe reach the ladle nozzle, and then manually pours drainage sand into the sand adding pipe to make the drainage sand cover the maintained nozzle to prevent oxidation and slagging. Summary of the Invention

[0003] In view of the above problems existing in the prior art, the purpose of the embodiments of the present invention is to provide an intelligent sand adding system for ladle hot repair that can automatically add drainage sand, reduce the workload of personnel, and realize full-automatic operation.

[0004] The technical solution adopted in the embodiments of the present invention is an intelligent sand adding system for ladle hot repair, including:

[0005] A drainage sand fixed storage device, including a fixed platform and a sand storage component arranged on the fixed platform;

[0006] A mobile sand adding device, including a mobile trolley, a sand adding component, a sand adding bucket, and a lifting mechanism. The mobile trolley has a sand receiving position below the sand storage component and a sand adding position above the ladle, and the mobile trolley can move between the sand receiving position and the sand adding position; the sand adding component is arranged on the mobile trolley and is used to receive the drainage sand released from the sand storage component and send the drainage sand therein into the sand adding bucket; the lifting mechanism is arranged on the mobile trolley and is connected to the sand adding bucket, and is used to drive the sand adding bucket to lift and lower, so that the sand adding bucket can receive the drainage sand released from the sand adding component at a high position and can enter the position near the bottom of the ladle at a low position to release the drainage sand to the nozzle at the bottom of the ladle;

[0007] The control device is configured to control the fixed storage device for the drainage sand and the mobile sand adding device, and includes: controlling the movement of the mobile trolley from the sand receiving position to the sand adding position according to an instruction; when it is determined that the mobile trolley reaches the sand adding position, controlling the sand adding component to feed a fixed amount of drainage sand into the sand adding bucket, and controlling the lifting mechanism to drive the sand adding bucket to descend to a low position to discharge the drainage sand in the sand adding bucket to the nozzle of the ladle.

[0008] In some embodiments, the sand storage component includes a fixed hopper, a first weighing device, and a first electric valve; the fixed hopper is arranged on the first weighing device, the first weighing device is arranged on the fixed platform and is used for weighing the weight of the drainage sand in the fixed hopper; the discharge port of the fixed hopper passes through the fixed platform and is connected to a first discharge pipe; the first electric valve is arranged on the first discharge pipe; the first weighing device and the first electric valve are respectively electrically connected to the control device.

[0009] In some embodiments, the sand adding component includes a vehicle-mounted hopper, a second weighing device, and a second electric valve; the vehicle-mounted hopper is arranged on the second weighing device, the second weighing device is arranged on the upper platform of the mobile trolley and is used for weighing the weight of the drainage sand in the vehicle-mounted hopper; the discharge port of the vehicle-mounted hopper passes through the upper platform and is connected to a second discharge pipe, and the second discharge pipe is used for adding drainage sand to the sand adding bucket; the second electric valve is arranged on the second discharge pipe; the second weighing device and the second electric valve are respectively electrically connected to the control device.

[0010] In some embodiments, the sand adding component further includes a transition funnel, the transition funnel is located obliquely below the vehicle-mounted hopper, the lower end outlet of the second discharge pipe is directly opposite to the upper port of the transition funnel, and the lower end outlet of the transition funnel is directly opposite to the sand adding bucket in the high position.

[0011] In some embodiments, the lifting mechanism includes a hoisting device, and the hoisting device includes a power mechanism, a fixed pulley set, a drum, and a bracket; the power mechanism and the fixed pulley set are both arranged on the bracket; a first chain is wound around the drum, and the free end of the first chain bypasses the fixed pulley set and is connected to the sand adding bucket; the power mechanism is connected to the drum and is used for driving the drum to rotate to release or wind the first chain so that the sand adding bucket descends or ascends.

[0012] In some embodiments, a sand outlet is provided at the bottom of the sand-adding bucket. A plug is provided inside the sand-adding bucket. The plug is connected to the bracket of the hoisting device through a second chain and forms a connection point. When the sand-adding bucket rises under the drive of the hoisting device to a distance less than or equal to the length of the second chain from the connection point, the second chain is in a slack state, and the plug blocks the sand outlet under the action of gravity. When the sand-adding bucket descends under the drive of the hoisting device to a distance greater than the length of the second chain from the connection point, the second chain is in a tensioned state and drives the plug to disengage from the sand outlet, opening the sand outlet.

[0013] In some embodiments, the mobile trolley includes a trolley platform and a plurality of columns provided below the trolley platform. Travel wheel sets are installed at the bottommost part of the columns. Driving mechanisms are provided on the travel wheels of the travel wheel sets. The driving mechanisms are electrically connected to the control device. The control device controls the driving mechanisms to start according to the received sand-adding instruction.

[0014] In some embodiments, the control device is further configured to, when receiving a first instruction to add sand to the vehicle-mounted hopper, control the mobile trolley to be in the sand-receiving position according to the first instruction, control the first electric valve to open, and add the guiding sand in the fixed hopper to the vehicle-mounted hopper;

[0015] The control device is further configured to receive the weight information of the guiding sand in the fixed hopper weighed by the first weighing device and / or the weight information of the guiding sand in the vehicle-mounted hopper weighed by the second weighing device. When it is determined that the weight of the guiding sand in the fixed hopper decreases to a first set value and / or the weight of the guiding sand in the vehicle-mounted hopper reaches a second set value, the control device controls the first electric valve to close.

[0016] In some embodiments, a feeding device for adding guiding sand to the fixed hopper is further included. The feeding device is electrically connected to the control device;

[0017] The control device is further configured to receive the first weight of the guiding sand in the fixed hopper weighed by the first weighing device. When it is determined according to the first weight that the weight of the guiding sand in the fixed hopper is less than a third set value, the control device controls the feeding device to add guiding sand to the fixed hopper; when it is determined according to the first weight that the weight of the guiding sand in the fixed hopper reaches the third set value, the control device controls the feeding device to stop adding guiding sand to the fixed hopper.

[0018] In some embodiments, the control device is configured to control the opening of the second electric valve when it is determined that the mobile trolley is in the sand-adding position, so that the guiding sand in the on-vehicle hopper is added to the transition funnel and sent into the sand-adding lifting bucket by the transition funnel;

[0019] The control device is further configured to control the closing of the second electric valve and control the start of the lifting mechanism to drive the sand-adding lifting bucket to descend to a position close to the ladle nozzle when receiving the second weight information sent by the second weighing device, where the second weight information is the information generated when the second weighing device weighs that the weight of the guiding sand in the on-vehicle hopper has decreased to the fourth set value.

[0020] Compared with the prior art, the beneficial effects of the intelligent sand-adding system for ladle hot repair in the embodiments of the present invention are as follows: 1. Automatic addition and automatic feeding of guiding sand; 2. Using a mechanical structure, the sand bucket is lowered to the bottom of the ladle for automatic opening and closing, solving the problem of ultra-high temperature control that cannot be achieved by electrical components; operators do not need to go up to the operation console for operation, and can start with one key on the ground, and can achieve safety interlock control.

[0021] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present invention.

[0022] An overview of various implementations or examples of the technology described in the present invention is not a full disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetical suffixes or different alphabetical suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and are used together with the description and the claims to illustrate the embodiments of the invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended as an exhaustive or exclusive embodiment of the device or method.

[0024] Figure 1 It is a schematic structural diagram of a mobile sand-adding device in the intelligent sand-adding system for ladle hot repair in the embodiments of the present invention.

[0025] Figure 2 is Figure 1 the A-direction view of

[0026] Figure 3 is Figure 2 the enlarged view of part B in

[0027] Figure 4 This is a schematic structural view of the mobile sand adding device according to an embodiment of the present invention in the sand receiving position (standby position).

[0028] Figure 5 It is Figure 4 the view from direction C of

[0029] Figure 6 It is Figure 4 the top view of

[0030] Figure 7 This is a schematic structural view of the mobile sand adding device according to an embodiment of the present invention in the sand adding position (working position).

[0031] Figure 8 It is Figure 7 the view from direction D of

[0032] Reference numerals:

[0033] 11 - Fixed platform; 12 - Fixed hopper; 13 - First weighing device; 14 - First electric valve; 15 - First discharge pipe;

[0034] 21 - Mobile trolley; 22 - Trolley platform; 23 - Column; 24 - Traveling wheel set; 25 - Upper platform; 26 - Lower platform; 27 - Reduction motor;

[0035] 31 - Sand adding lifting bucket; 32 - Plug; 33 - Second chain; 34 - Installation short chain;

[0036] 41 - Vehicle-mounted hopper; 42 - Second discharge pipe; 43 - Second weighing device; 44 - Second electric valve;

[0037] 51 - Transition funnel; 52 - Third discharge pipe;

[0038] 6 - Hoisting device; 61 - Power mechanism; 62 - Fixed pulley set; 63 - Drum; 64 - Bracket; 65 - Drum support; 66 - First chain;

[0039] 7 - Control device;

[0040] 8 - Ladle. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or items appearing before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted in the present invention.

[0044] An embodiment of the present invention provides an intelligent sand adding system for hot repair of ladles, which is used to automatically add drainage sand to the nozzle inside the bottom of the ladle 8 (see Figure 7 and Figure 8 ) to carry out oxidation protection for nozzle discharging.

[0045] As Figures 1 to 8As described above, the intelligent sand adding system includes a fixed drainage sand storage device, a mobile sand adding device, and a control device 7. The fixed drainage sand storage device includes a fixed platform 11 and a sand storage assembly provided on the fixed platform 11. The sand storage assembly stores drainage sand and is used to provide drainage sand for the mobile sand adding device as needed. The mobile sand adding device includes a mobile trolley 21, a sand adding assembly, a sand adding bucket 31, and a lifting mechanism. The mobile trolley 21 has a standby position and a working position; in the standby position, the mobile trolley 21 is located below the sand storage assembly and can receive the drainage sand provided by the sand storage assembly. Therefore, the standby position can also be called the sand receiving position; in the working position, the mobile trolley 21 is located above the ladle 8, and the sand adding assembly on the mobile trolley 21 can send the drainage sand into the ladle 8. Therefore, the working position can also be called the sand adding position. The mobile trolley 21 can move between the standby position and the working position to achieve sand receiving and sand adding. The sand adding assembly is provided on the mobile trolley 21 and moves together with the mobile trolley 21. When the mobile trolley 21 is in the standby position, the sand adding assembly can receive the drainage sand released from the sand storage assembly; when the mobile trolley 21 is in the working position, the sand adding assembly can send the drainage sand in it into the sand adding bucket 31. The lifting mechanism is provided on the mobile trolley 21 and is connected to the sand adding bucket 31, and is used to drive the sand adding bucket 31 to lift and lower, so that the sand adding bucket 31 has a high position and a low position. When the sand adding bucket 31 is in the high position, it can receive the drainage sand released from the sand adding assembly; when the sand adding bucket 31 is in the low position, it is located inside the ladle 8 and close to the bottom of the ladle 8, and can release the drainage sand to the nozzle at the bottom of the ladle 8. The control device 7 is configured to control the fixed drainage sand storage device and the mobile sand adding device, including: controlling the mobile trolley 21 to move from the standby position to the working position according to an instruction, and when it is determined that the mobile trolley 21 reaches the working position, controlling the sand adding assembly to send a fixed amount of drainage sand into the sand adding bucket 31, and controlling the lifting mechanism to drive the sand adding bucket 31 to descend to the low position, and releasing the drainage sand in the sand adding bucket 31 to the nozzle of the ladle 8.

[0046] The intelligent sand adding system according to the embodiment of the present invention does not require manual operation by an operator, automatically adds drainage sand at the working position, reduces the workload of personnel, and realizes full-automatic operation while providing equipment support for the intelligent hot repair and maintenance of the ladle.

[0047] In some embodiments, such as Figure 4 and Figure 5As shown in the figure, the sand storage assembly includes a fixed hopper 12, a first weighing device 13, and a first electric valve 14. The fixed hopper 12 is filled with diversion sand. The fixed hopper 12 is arranged on the first weighing device 13, and the first weighing device 13 is arranged on the fixed platform 11. The first weighing device 13 is used to weigh the weight of the diversion sand in the fixed hopper 12. The discharge port of the fixed hopper 12 passes through the fixed platform 11 and is connected to the first discharge pipe 15. The first electric valve 14 is arranged on the first discharge pipe 15. When the first electric valve 14 is opened, the diversion sand in the fixed hopper 12 can be discharged through the first discharge pipe 15. The first weighing device 13 and the first electric valve 14 are respectively electrically connected to the control device 7. The control device 7 can obtain the weight information of the diversion sand in the fixed hopper 12 through the first weighing device 13. At the same time, the control device 7 is also used to control the opening and closing of the first electric valve 14 to control whether to discharge the diversion sand in the fixed hopper 12 to the sand adding assembly and control the discharge amount of the diversion sand. For example, the discharge amount of the diversion sand in the fixed hopper 12 can be achieved by controlling the opening time of the first electric valve 14, or by judging the obtained weight information of the diversion sand in the fixed hopper 12.

[0048] In some embodiments, as Figure 1 and Figure 2 shown, the sand adding assembly includes a vehicle-mounted hopper 41, a second weighing device 43, and a second electric valve 44. The vehicle-mounted hopper 41 is arranged on the second weighing device 43. The vehicle-mounted hopper 41 is used to receive the diversion sand discharged from the fixed hopper 12. Therefore, when the mobile trolley 21 is in the sand receiving position, the vehicle-mounted hopper 41 is directly opposite to the lower outlet of the first discharge pipe 15. The second weighing device 43 is arranged on the upper platform 25 of the mobile trolley 21. The second weighing device 43 is used to weigh the weight of the diversion sand in the vehicle-mounted hopper 41. The discharge port of the vehicle-mounted hopper 41 passes through the upper platform 25 and is connected to the second discharge pipe 42. The diversion sand in the vehicle-mounted hopper 41 is added to the sand adding bucket 31 through the second discharge pipe 42. The second electric valve 44 is arranged on the second discharge pipe 42. The second weighing device 43 and the second electric valve 44 are respectively electrically connected to the control device 7. The control device 7 can obtain the weight information of the diversion sand in the vehicle-mounted hopper 41 through the second weighing device 43. At the same time, the control device 7 is also used to control the opening and closing of the second electric valve 44 to make the second discharge pipe 42 conduct or cut off, so as to realize whether to add the diversion sand in the vehicle-mounted hopper 41 to the sand adding bucket 31 and control the addition amount of the diversion sand. The addition amount of the diversion sand in the sand adding bucket 31 can be achieved by controlling the opening time of the second electric valve 44, or by judging the obtained weight information of the diversion sand in the vehicle-mounted hopper 41.

[0049] In some embodiments, the sand adding assembly further includes a transition funnel 51. The transition funnel 51 is located obliquely below the vehicle-mounted hopper 41. The lower end outlet of the second discharge pipe 42 is directly opposite to the upper port of the transition funnel 51, and the lower end outlet of the transition funnel 51 is directly opposite to the sand adding bucket 31 at a high position. The guiding sand in the vehicle-mounted hopper 41 first enters the transition funnel 51, and then the guiding sand is added to the sand adding bucket 31 through the transition funnel 51. In this way, when a failure occurs in the vehicle-mounted hopper 41 or the second electric valve 44 has a problem and cannot discharge materials, workers can manually add materials (the materials here refer to guiding sand) to the sand adding bucket 31 through the transition funnel 51.

[0050] The transition funnel 51 can be a square funnel. By using a square funnel, the material receiving area can be increased and the usability can be improved. Of course, the transition funnel 51 can also be a circular funnel.

[0051] Both the first electric valve 14 and the second electric valve 44 can be electric butterfly valves, which have a simple structure and are convenient to control.

[0052] As Figure 1 shown, when the sand adding bucket 31 is at a high position, the sand adding bucket 31 is located obliquely below the transition funnel 51. The lower part of the transition funnel 51 has a slender third discharge pipe 52, and the third discharge pipe 52 is inclined so that the lower end of the third discharge pipe 52 can extend to the upper port of the sand adding bucket 31. In this way, the installation height of the transition funnel 51 can be reduced.

[0053] In some embodiments, the lifting mechanism can adopt a hoisting device 6. As Figure 1 and Figure 2 shown, the hoisting device 6 includes a power mechanism 61, a fixed pulley set 62, a drum 63 and a bracket 64. The power mechanism 61, the fixed pulley set 62 and the drum 63 are all arranged on the bracket 64. A first chain 66 is wound around the drum 63, and the free end of the first chain 66 bypasses the fixed pulley set 62 and is connected to the sand adding bucket 31. The power mechanism 61 is connected to the drum 63 and is used to drive the drum 63 to rotate so as to release or wind the first chain 66, causing the sand adding bucket 31 to descend or ascend. Through the hoisting mechanism, the sand adding bucket 31 can be driven to lift and lower to switch between a high position and a low position. As Figure 1 、 Figure 2 、 Figure 4 and Figure 5 shown, the sand adding bucket 31 is at a high position, and the upper bucket opening of the sand adding bucket 31 is opposite to the lower end outlet of the transition funnel 51 so that the guiding sand in the transition funnel 51 can be added to the sand adding bucket 31. As Figure 7 and Figure 8 shown, the sand adding bucket 31 is at a low position, the sand adding bucket 31 is located in the ladle 8 and is close to the bottom of the ladle 8, and the guiding sand in the sand adding bucket 31 can be directly discharged and fall onto the nozzle at the bottom of the ladle 8.

[0054] The power mechanism 61 can be a reduction motor 27. As the power source, the output shaft of the reduction motor 27 is connected to the shaft of the drum 63. The drum 63 can be fixed on the drum support 65 through two bearing seats, and the drum support 65 is arranged on the bracket 64. Grooves for winding the first chain 66 can be provided on the drum 63. The fixed pulley set 62 is arranged at a position close to the position where the sand-adding lifting bucket 31 is at a high position. One end of the first chain 66 is fixed to the drum 63. After winding around the drum 63 for a certain number of turns, the other end bypasses the fixed pulley set 62 and is then connected to the sand-adding lifting bucket 31. In this way, the sand-adding lifting bucket 31 is connected to the hoisting device 6. When the reduction motor 27 works, the first chain 66 is wound in and out by the drum 63 to realize the lifting of the sand-adding lifting bucket 31; the reduction motor 27 is equipped with an encoder, and the rotation speed is controlled by the encoder to control the lifting stroke of the sand-adding lifting bucket 31.

[0055] As Figure 3 shown, three chain hanging points can be provided at the upper end of the sand-adding lifting bucket 31. One end of each installation short chain 34 is respectively connected to each chain hanging point. The other ends of the three installation short chains 34 converge to the same link, and the link is fixed to the free end of the first chain 66 of the hoisting device 6. In this way, the connection between the sand-adding lifting bucket 31 and the first chain 66 is realized, and the connection is stable, which can ensure the balance of the sand-adding lifting bucket 31 and prevent it from deflecting.

[0056] The upper end of the sand-adding lifting bucket 31 can be open, which is convenient for the transition funnel 51 to add sand into the sand-adding lifting bucket 31. The bottom of the sand-adding lifting bucket 31 can be provided with a sand outlet, and the guiding sand in the sand-adding lifting bucket 31 is unloaded through the sand outlet to the water outlet at the bottom of the ladle 8. Specifically, as Figure 2 and Figure 3 shown, a plug 32 is provided in the sand-adding lifting bucket 31 for guiding sand. The plug 32 is connected to the bracket 64 of the hoisting device 6 through the second chain 33 and forms a connection point. That is, the upper end of the second chain 33 is fixed to the bracket 64, and the lower end of the second chain 33 is fixed to the plug 32. When the sand-adding lifting bucket 31 rises under the drive of the hoisting device 6 to a distance less than or equal to the length of the second chain 33 from the connection point, the second chain 33 is in a slack state, and the plug 32 blocks the sand outlet under the action of gravity. Refer to Figures 1 to 3 , the slack chain piles up at the bottom of the sand-adding lifting bucket 31, and the plug 32 blocks the sand outlet, and the guiding sand cannot flow out. When the sand-adding lifting bucket 31 descends under the drive of the hoisting device 6 to a distance greater than the length of the second chain 33 from the connection point, the second chain 33 is in a tension state and drives the plug 32 to disengage from the sand outlet. Refer to Figure 7 and Figure 8 , so that the sand outlet is opened, and the guiding sand in the sand-adding lifting bucket 31 flows out and falls to the water outlet at the bottom of the ladle 8. By using a mechanical structure, the sand-adding lifting bucket 31 is lowered to the bottom of the ladle 8 to automatically open the sand outlet, solving the problem of ultra-high temperature control that cannot be achieved by using electrical components.

[0057] The length of the second chain 33 is determined according to the distance between the support 64 and the nozzle at the bottom of the ladle 8. It should neither be too long nor too short. If the second chain 33 is too long, it will cause the problem that the sand-adding bucket 31 has reached the bottom of the ladle 8 but the sand outlet cannot be opened, thus affecting sand addition. If the second chain 33 is too short, it will cause the problem that the sand-adding bucket 31 has not reached the bottom of the ladle 8 and the sand outlet is opened in advance, resulting in the falling sand not accurately falling onto the nozzle. To ensure that the flow guiding sand flowing out of the sand-adding bucket 31 accurately falls onto the nozzle, the position of the sand-adding bucket 31 when the sand outlet is opened should neither be too high nor too low. For example, when the sand-adding bucket 31 is about 300 - 400 mm away from the bottom of the ladle 8, the second chain 33 is just straightened and reaches the limit, the plug 32 no longer moves down, and the sand-adding bucket 31 can still move down under the action of the hoisting device 6. At this time, the sand outlet at the bottom of the sand-adding bucket 31 is opened.

[0058] In some embodiments, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 shown, the mobile trolley 21 includes a trolley platform 22 and a plurality of columns 23 arranged below the trolley platform 22. The bottommost part of the columns 23 is equipped with a traveling wheel set 24. The traveling wheels of the traveling wheel set are provided with a driving mechanism to realize the movement of the mobile trolley 21. The driving mechanism can be a reduction motor 27. The driving mechanism is electrically connected to the control device 7. The control device 7 controls the driving mechanism to start according to the received sand-adding instruction, so that the mobile trolley 21 switches between the standby position and the sand-adding position.

[0059] It can be understood that the standby position of the mobile trolley 21 is far from the sand-adding working position of the ladle 8, and there is a certain distance from the standby position to the working position. The movement during this period is realized by the traveling driving device arranged on the column 23. In addition, the trolley platform 22 has a certain height, which can meet the free passage of the mobile trolley 21 without rubbing against the ladle 8 when the ladle 8 is in an upright state. When the mobile trolley 21 is in the working position, it is located above the ladle 8, which means that the trolley platform 22 is located above the ladle 8.

[0060] such as Figure 2As shown in the figure, an upper platform 25 and an intermediate platform are provided on the upper surface of the trolley platform 22. The upper platform 25 is located obliquely above the intermediate platform. The second weighing device 43 and the vehicle-mounted hopper 41 are both provided on the upper platform 25. The intermediate platform is used to support the transition funnel 51. The third discharge pipe 52 of the transition funnel 51 passes through the intermediate platform and corresponds to the sand-adding bucket 31. In this way, the vehicle-mounted hopper 41 and the transition funnel 51 are arranged in a staggered manner to avoid excessive overall height and cause restrictions on the movement of the mobile trolley 21. Specifically, the transition funnel 51 is located obliquely below the vehicle-mounted hopper 41, and the second discharge pipe 42 of the vehicle-mounted hopper 41 is inclined so that the lower end of the second discharge pipe 42 extends to the upper port of the transition funnel 51. In this way, on the one hand, the diversion sand in the vehicle-mounted hopper 41 can fall into the transition funnel 51 by gravity, and on the other hand, the overall height of the mobile trolley 21 is prevented from being too high. A passage allowing the sand-adding bucket 31 to pass through is provided on the trolley platform 22. When the sand-adding bucket 31 is in the high position, at least the top of the sand-adding bucket 31 extends out of the trolley platform 22 through the passage to correspond to the lower discharge end of the third discharge pipe 52.

[0061] As Figure 5 shown, when the mobile trolley 21 is in the standby position, the fixed hopper 12 is located obliquely above the mobile trolley 21, without hindering the movement of the mobile trolley 21. The first discharge pipe 15 of the fixed hopper 12 is inclined so that the lower end of the first discharge pipe 15 extends to the upper port of the vehicle-mounted hopper 41. That is, when the mobile trolley 21 is in the standby position, in the vertical direction, the fixed hopper 12 and the vehicle-mounted hopper 41 are arranged in a staggered manner, avoiding the need to set the fixed hopper 12 at too high a position, which brings difficulties to the operation.

[0062] In some embodiments, the control device 7 is further configured to, when receiving the first instruction to add sand to the vehicle-mounted hopper 41, control the mobile trolley 21 to be in the sand-receiving position according to the first instruction, control the first electric valve 14 to open, and add the diversion sand in the fixed hopper 12 to the vehicle-mounted hopper 41. That is, when the weighing value of the second weighing device 43 is lower than the set value and the amount of diversion sand in the vehicle-mounted hopper 41 is insufficient to meet the amount to be added to the sand-adding bucket 31, the mobile trolley 21 receives the first instruction. If the mobile trolley 21 is not in the standby position, the mobile trolley 21 first moves to the standby position. When it is determined that the mobile trolley 21 is in the standby position, the control device 7 controls the first electric valve 14 to open automatically, and the diversion sand is added from the fixed hopper 12 to the vehicle-mounted hopper 41 on the mobile trolley 21. The added amount can be set in advance through a program. After the sand addition to the vehicle-mounted hopper 41 is completed, the control device 7 controls the first electric valve 14 to close automatically. In this way, the automatic feeding operation is completed when the mobile trolley 21 is in the standby position.

[0063] In some embodiments, the control device 7 is further configured to receive the weight information of the flow guiding sand in the fixed hopper 12 weighed by the first weighing device 13 and / or the weight information of the flow guiding sand in the vehicle-mounted hopper 41 weighed by the second weighing device 43. When it is determined that the weight of the flow guiding sand in the fixed hopper 12 decreases to a first set value and / or the weight of the flow guiding sand in the vehicle-mounted hopper 41 reaches a second set value, the control device controls the first electric valve 14 to close. That is, the weight of the flow guiding sand weighed by the first weighing device 13 and / or the second weighing device 43 is used to determine whether the sand addition to the vehicle-mounted hopper 41 is completed. Of course, the sand addition completion can also be determined by setting the sand addition time, and after a predetermined sand addition time, the sand addition completion can also be judged.

[0064] In some embodiments, the intelligent sand addition system for hot repair of ladles further includes a feeding device (not shown in the figure) for adding flow guiding sand to the fixed hopper 12, and the feeding device is electrically connected to the control device. The control device is further configured to receive the first weight of the flow guiding sand in the fixed hopper 12 weighed by the first weighing device 13. When it is determined according to the first weight that the weight of the flow guiding sand in the fixed hopper 12 is less than a third set value, the control device controls the feeding device to add flow guiding sand to the fixed hopper 12; when it is determined according to the first weight information that the weight of the flow guiding sand in the fixed hopper 12 reaches the third set value, the control device controls the feeding device to stop adding flow guiding sand to the fixed hopper 12. That is, through the first weighing device 13, the inventory of the flow guiding sand in the fixed hopper 12 can be detected. If the inventory of the flow guiding sand in the fixed hopper 12 is less than the third set value, it is determined that the amount of the flow guiding sand therein is insufficient, and a signal is sent to the control device 7 to prompt the feeding operation.

[0065] In some embodiments, the control device 7 is configured to control the second electric valve 44 to open when it is determined that the mobile trolley 21 is in the sand addition position, so that the flow guiding sand in the vehicle-mounted hopper 41 is added to the transition funnel 51 and sent to the sand addition lifting bucket 31 by the transition funnel 51. The opening time of the second electric valve 44 can be set in advance. During the opening time, the flow guiding sand flows out of the vehicle-mounted hopper 41, and the outflow amount meets the required amount for covering the nozzle. The second weighing device 43 can also be used to weigh the discharged amount of the flow guiding sand. When the discharged amount reaches the set amount, the second electric valve 44 is closed, where the set amount is the required addition amount for each nozzle.

[0066] The control device 7 is further configured to control the second electric valve 44 to close and control the lifting mechanism to start to drive the sand addition lifting bucket 31 to descend to a position close to the nozzle of the ladle 8 when it receives the second weight information sent by the second weighing device 43 and determines that the sand addition from the transition funnel 51 to the sand addition lifting bucket 31 is completed, where the second weight information is the information generated when the second weighing device 43 weighs that the weight of the flow guiding sand in the vehicle-mounted hopper 41 decreases to a fourth set value.

[0067] Before the lifting mechanism is started, the sand-adding bucket 31 is in the high position. When the guiding sand is lowered from the vehicle-mounted hopper 41 through the transition funnel 51 into the sand-adding bucket 31, the plug 32 blocks the sand outlet. When the lifting mechanism drives the sand-adding bucket 31 together with the plug 32 to be lowered to about 300 - 400 mm from the bottom of the ladle 8, the length of the second chain 33 connecting the plug 32 reaches the limit, and the plug 32 no longer moves downward. The sand-adding bucket 31 can still move downward under the drive of the lifting mechanism. At this time, the plug 32 disengages from the sand outlet, and the guiding sand flows out from the sand-adding bucket 31 and falls to the water outlet at the bottom of the ladle 8 for the operation of adding the guiding sand. After all the guiding sand is discharged, the lifting mechanism lifts the sand-adding bucket 31 to a certain height, and the plug 32 blocks the sand outlet at the bottom of the sand-adding bucket 31 again. The lifting mechanism lifts the sand-adding bucket 31 to the high position (the position where the upper port of the sand-adding bucket 31 is opposite to the lower outlet of the third discharge pipe 52 of the transition funnel 51), completing a sand-adding working process.

[0068] The first weighing device 13 and the second weighing device 43 may be respectively provided with weighing sensors to weigh the weight of the guiding sand through the weighing sensors.

[0069] The intelligent sand-adding system for ladle hot repair in the embodiment of the present invention can be powered by a cable trolley or a winch drum.

[0070] The control device 7 of the automatic sand-adding system is arranged on the workshop floor or the fixed platform 11 and does not move with the mobile trolley 21. It covers the replenishment alarm and automatic discharging control of the fixed hopper 12 on the workshop fixed platform 11, the control of adding and discharging the guiding sand in the vehicle-mounted hopper 41 on the mobile trolley 21, the traveling control of the mobile trolley 21, the control of discharging the guiding sand in the sand-adding bucket 31, the lifting control of the hoisting device 6, etc. There are interlocks for the traveling of the mobile trolley 21 and the control of adding the guiding sand in the vehicle-mounted hopper 41, and also for adding the guiding sand in the sand-adding bucket 31. During the process of adding the guiding sand, the mobile trolley 21 cannot move, and during the traveling process, the guiding sand cannot be added; there is an interlock between the traveling of the mobile trolley 21 and the drive of the hoisting device 6. When the hoisting device 6 is lifting or lowering, the mobile trolley 21 cannot move, and when the mobile trolley 21 is moving, the hoisting device 6 cannot be started.

[0071] Next, the working process of the automatic sand-adding system in the embodiment of the present invention will be described:

[0072] Standby:

[0073] The starting position of the mobile trolley 21 is the standby position. Refer to Figure 4 and Figure 5, at this time, the position of the mobile trolley 21 just makes the on-vehicle hopper 41 located below the outlet of the first discharge pipe 15 of the fixed hopper 12 of the fixed platform 11. When the system feedbacks that the amount of flow guiding sand in the on-vehicle hopper 41 is insufficient and lower than the set value, the first electric valve 14 at the lower part of the fixed hopper 12 automatically opens, and the flow guiding sand in the fixed hopper 12 automatically flows into the on-vehicle hopper 41. The amount of flow guiding sand put in is set and controlled according to the agreed weight. After the addition of the flow guiding sand is completed, the first electric valve 14 below the fixed hopper 12 closes. During the feeding process, interlocks are controlled. After the feeding is completed, the signal interlock of the mobile trolley 21 is released, and it waits for the sand addition operation command;

[0074] Sand addition:

[0075] When receiving the sand addition instruction, the mobile trolley 21 travels to the working position and stops. See Figure 7 and Figure 8 , at this time, the stop position of the mobile trolley 21 just makes the sand addition lifting bucket 31 directly face the nozzle position of the ladle 8. The second electric valve 44 below the on-vehicle hopper 41 opens, and the flow guiding sand flows from the on-vehicle hopper 41 through the transition funnel 51 into the sand addition lifting bucket 31. After the flow guiding sand flows out to the set amount, the discharging stops, and the second electric valve 44 closes. The amount of flow guiding sand in the sand addition lifting bucket 31 just meets the requirement for full coverage of the nozzle; Subsequently, the hoisting device 6 on the trolley platform 22 receives the start signal, and the hoisting device 6 lowers the sand addition lifting bucket 31. When the hoisting device 6 starts to the set time, it just makes the sand addition lifting bucket 31 lower to a certain height from the bottom of the ladle 8. The stopper 32 is lifted to open the water outlet, and the sand addition lifting bucket 31 continues to be lowered for a fixed time, which meets the time required for all the flow guiding sand in the sand addition lifting bucket 31 to flow out. At this time, the flow guiding sand covers the nozzle mechanism at the bottom of the ladle 8. The hoisting device 6 stops working and delays for a period of time, and then the hoisting device 6 starts to reverse and lifts the sand addition lifting bucket 31. During the lifting process, the stopper 32 seals the sand outlet at the lower part of the sand addition lifting bucket 31. After the sand addition lifting bucket 31 is lifted to the high position (initial position), the hoisting device 6 stops working, and the signal is transmitted to the control device 7. The traveling device of the mobile trolley 21 receives the instruction, and the mobile trolley 21 starts to travel in the reverse direction and returns to the standby position, completing a working cycle.

[0076] The intelligent sand addition system for ladle hot repair in the embodiment of the present invention has the following advantages:

[0077] 1. It solves the problem of automatically replenishing the flow guiding sand from the fixed hopper 12 and the on-vehicle hopper 41 to the sand addition lifting bucket 31;

[0078] 2. Through the mechanical structure design, the flow guiding sand in the sand addition lifting bucket 31 on the mobile trolley 21 can be automatically put. This operation process adapts to the high-temperature conditions in the red-hot ladle and solves the problem of ultra-high temperature control that cannot be achieved by electrical components;

[0079] 3. Achieve safety interlock control through the interlock of control signals of each mechanism: The sand adding operation and the traveling cannot be carried out simultaneously; the feeding operation, the traveling and the sand adding cannot be carried out simultaneously.

[0080] The above description is intended to be illustrative rather than restrictive, and those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more aspects thereof) can be used in combination with each other, and it is contemplated that these embodiments can be combined with each other in various combinations or permutations.

Claims

1. An intelligent sand adding system for ladle hot repair, characterized in that, Including: A tundish stopper fixing and storing device, including a fixed platform and a sand storage assembly arranged on the fixed platform; A mobile sand adding device, including a mobile trolley, a sand adding assembly, a sand adding bucket and a lifting mechanism. The mobile trolley has a sand receiving position below the sand storage assembly and a sand adding position above the ladle. The mobile trolley can move between the sand receiving position and the sand adding position. The sand adding assembly is arranged on the mobile trolley and is used for receiving the tundish stopper released from the sand storage assembly and feeding the tundish stopper therein into the sand adding bucket. The lifting mechanism is arranged on the mobile trolley and is connected to the sand adding bucket, and is used for driving the sand adding bucket to lift and lower, so that the sand adding bucket can receive the tundish stopper released from the sand adding assembly at a high position and can enter a position near the bottom of the ladle at a low position to release the tundish stopper to the nozzle at the bottom of the ladle; A control device configured to control the tundish stopper fixing and storing device and the mobile sand adding device, including: controlling the mobile trolley to move from the sand receiving position to the sand adding position according to an instruction. When it is determined that the mobile trolley reaches the sand adding position, controlling the sand adding assembly to feed a fixed amount of tundish stopper into the sand adding bucket, and controlling the lifting mechanism to drive the sand adding bucket to descend to a low position to release the tundish stopper in the sand adding bucket to the nozzle of the ladle; The lifting mechanism includes a hoisting device, and the hoisting device includes a power mechanism, a fixed pulley set, a drum and a bracket. The power mechanism and the fixed pulley set are both arranged on the bracket. A first chain is wound around the drum, and the free end of the first chain bypasses the fixed pulley set and is connected to the sand adding bucket. The power mechanism is connected to the drum and is used for driving the drum to rotate to release or wind the first chain, so that the sand adding bucket descends or ascends; The bottom of the sand adding bucket is provided with a sand outlet, and a plug is arranged in the sand adding bucket. The plug is connected to the bracket of the hoisting device through a second chain and forms a connection point. When the sand adding bucket rises to a distance less than or equal to the length of the second chain from the connection point under the drive of the hoisting device, the second chain is in a slack state, and the plug plugs the sand outlet under the action of gravity. When the sand adding bucket descends to a distance greater than the length of the second chain from the connection point under the drive of the hoisting device, the second chain is in a tension state and drives the plug to disengage from the sand outlet, so that the sand outlet is opened.

2. The intelligent sand adding system for ladle hot repair according to claim 1, wherein The sand storage assembly includes a fixed hopper, a first weighing device and a first electric valve. The fixed hopper is arranged on the first weighing device, and the first weighing device is arranged on the fixed platform and is used for weighing the weight of the tundish stopper in the fixed hopper. The discharge port of the fixed hopper passes through the fixed platform and is connected to a first discharge pipe. The first electric valve is arranged on the first discharge pipe. The first weighing device and the first electric valve are respectively electrically connected to the control device.

3. The intelligent sand adding system for ladle hot repair according to claim 2, characterized in that, The sand adding assembly includes a vehicle-mounted hopper, a second weighing device, and a second electric valve; the vehicle-mounted hopper is disposed on the second weighing device, the second weighing device is disposed on the upper platform of the mobile trolley, and the second weighing device is used to weigh the weight of the diversion sand in the vehicle-mounted hopper; the discharge port of the vehicle-mounted hopper passes through the upper platform and is connected to a second discharge pipe, and the second discharge pipe is used to add diversion sand to the sand adding bucket; the second electric valve is disposed on the second discharge pipe; the second weighing device and the second electric valve are respectively electrically connected to the control device.

4. The intelligent sand adding system for ladle hot repair according to claim 3, characterized in that, The sand adding assembly further includes a transition funnel, the transition funnel is located obliquely below the vehicle-mounted hopper, the lower end outlet of the second discharge pipe is directly opposite to the upper port of the transition funnel, and the lower end outlet of the transition funnel is directly opposite to the sand adding bucket at a high position.

5. The intelligent sand adding system for ladle hot repair according to claim 1, characterized in that, The mobile trolley includes a trolley platform and a plurality of columns disposed below the trolley platform. A traveling wheel set is installed at the bottom of the columns, and a driving mechanism is provided on the traveling wheels of the traveling wheel set. The driving mechanism is electrically connected to the control device, and the control device controls the driving mechanism to start according to the received sand adding instruction.

6. The intelligent sand adding system for ladle hot repair according to claim 3, characterized in that, The control device is further configured to, when receiving a first instruction to add sand into the vehicle-mounted hopper, control the mobile trolley to be in the sand receiving position according to the first instruction, control the first electric valve to open, and add the diversion sand in the fixed hopper into the vehicle-mounted hopper; The control device is further configured to receive the weight information of the diversion sand in the fixed hopper weighed by the first weighing device and / or the weight information of the diversion sand in the vehicle-mounted hopper weighed by the second weighing device. When it is determined that the weight of the diversion sand in the fixed hopper is reduced to a first set value and / or the weight of the diversion sand in the vehicle-mounted hopper reaches a second set value, control the first electric valve to close.

7. The intelligent sand adding system for ladle hot repair according to claim 6, characterized in that, It further includes a feeding device for adding diversion sand to the fixed hopper, and the feeding device is electrically connected to the control device; The control device is further configured to receive the first weight of the diversion sand in the fixed hopper weighed by the first weighing device. When it is determined according to the first weight that the weight of the diversion sand in the fixed hopper is less than a third set value, control the feeding device to add diversion sand into the fixed hopper; when it is determined according to the first weight that the weight of the diversion sand in the fixed hopper reaches the third set value, control the feeding device to stop adding diversion sand into the fixed hopper.

8. The intelligent sand adding system for ladle hot repair according to claim 4, wherein The control device is configured to, when it is determined that the mobile trolley is in the sand adding position, control the second electric valve to open, add the diversion sand in the vehicle-mounted hopper into the transition funnel, and feed it into the sand adding bucket by the transition funnel; The control device is further configured to, when receiving the second weight information sent by the second weighing device, control the second electric valve to close and control the lifting mechanism to start, driving the sand-adding lifting bucket to descend to a position close to the ladle nozzle, where the second weight information is information generated when the second weighing device weighs that the weight of the flow guiding sand in the vehicle-mounted hopper has decreased to a fourth set value.

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