An oxygen blowing pipe lifting device

Abstract

This utility model discloses an oxygen lance lifting device, which mainly includes a sprocket assembly, a planetary reducer, a servo motor with a brake, a disc brake, an oxygen lance loading trolley, a guide rail, a counterweight assembly, and two sleeve roller chains. The technical solution of this utility model uses sleeve roller chains as the transmission mechanism to achieve the lifting and lowering movement of the oxygen lance. The counterweight end is lightweight and the structure is compact. The use of two chains to jointly pull the lifting and lowering movement of the oxygen lance and an automatic force adjustment mechanism improves the reliability of the lifting and lowering movement and ensures uniform force distribution on the two chains. The double-insurance braking arrangement combining a servo motor with a brake and a disc brake occupies little space and has high braking reliability.

Description

Technical Field

[0001] This utility model relates to steelmaking equipment in the field of metallurgical machinery, and particularly to an oxygen blowing pipe lifting device. Background Technology

[0002] In metallurgical steelmaking equipment, the oxygen blowing unit is a crucial piece of equipment in top-blown oxygen converter steelmaking. It blows high-pressure oxygen into the furnace through lifting oxygen blowing pipes, stirring the molten iron and completing the decarburization and dephosphorization reactions to achieve the steelmaking process. During steelmaking, the oxygen blowing pipes of the oxygen blowing unit need to be raised and lowered multiple times according to process requirements, and this raising and lowering movement is achieved through an oxygen blowing lifting device. Currently, single-winch and double-winch oxygen blowing lifting mechanisms are commonly used in China. Both of these types of oxygen blowing units employ winch lifting mechanisms and are equipped with complex balancing counterweight devices, resulting in problems such as complex structure, large space occupation, and high equipment investment.

[0003] Therefore, this utility model discloses an oxygen blowing pipe lifting device, which has a compact structure, low equipment investment, high reliability, and reduces actual production costs. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model discloses an oxygen blowing pipe lifting device; The oxygen lance lifting device includes: a sprocket assembly, a planetary reducer, a servo motor with a brake, a disc brake, an oxygen lance loading trolley, a guide rail, a counterweight assembly, a sleeve roller chain, and an oxygen lance. The sprocket assembly includes a bearing, a base frame, double-row sprockets, a sprocket mounting shaft, and a rotary encoder. A rectangular plate is mounted on the base frame, and a bearing mounting seat and a brake mounting seat are provided on the rectangular plate. The double-row sprockets are mounted on the sprocket mounting shaft, which is supported by bearings on the bearing mounting seats. A brake disc is provided in the middle of the double-row sprockets. The rotary encoder is driven by the sprocket mounting shaft to detect the rotation state. The servo motor with brake is connected to the planetary reducer, and the planetary reducer is connected to the sprocket mounting shaft to drive its rotation. The disc brake is mounted on the brake mounting seat of the base frame, and the disc brake is provided with a flat-jaw clamp to connect the brake disc of the double-row sprocket to achieve braking. The oxygen lance loading trolley is equipped with eight rollers and sixteen screw bearing pulleys, which together with the first rectangular guide rail form a moving pair. The oxygen lance is mounted on the oxygen lance loading trolley with a snap-fit ​​structure. The oxygen lance loading trolley is equipped with a weighing sensor. The counterweight assembly and the second rectangular guide rail of the guide rail form a sliding pair; The sleeve roller chain passes around the double row of sprockets, and its two ends are respectively hinged to the oxygen lance loading trolley and the counterweight assembly to form a chain drive to realize the linkage lifting of the two. Furthermore, the sprocket device comprises a first through cover, bearings, a base frame, a separable fixing clamp, double-row sprockets, a sprocket mounting shaft, a flat key, a second through cover, a small shaft, a bracket, and a rotary encoder; the base frame includes a rectangular plate; a rectangular hole is provided at the center of the rectangular plate; an ear plate is fixedly welded to the top surface of the rectangular plate on both sides of the long side of the rectangular hole; two bearing mounting seats are respectively provided on the outer vertical surfaces of the two ear plates; a brake mounting seat is fixedly welded to the top surface of the rectangular plate on one side of the short side of the rectangular hole; The double-row sprocket has a rotating body structure, with a sprocket at each end and a keyed through hole at the axis of the double-row sprocket; a brake disc is located between the two sprockets. The sprocket mounting shaft has a first journal section and a second journal section at both ends; the first journal section is connected to the wheel seat shaft section, and a blind hole with a keyway is provided at the center of the outer end face of the first journal section; a keyway is provided on the wheel seat shaft section. The flat key is mounted on the keyway of the sprocket mounting shaft; the wheel seat section of the sprocket mounting shaft is mounted in the keyway through hole of the double-row sprocket to form a key connection; The separate fixing clamp is placed on the wheel seat shaft section of the sprocket mounting shaft and axially fixes the double-row sprockets; The inner rings of the two bearings are respectively mounted on the first journal section and the second journal section of the sprocket mounting shaft, and the outer rings of the two bearings are respectively mounted in a bearing mounting seat of the base frame; The first transparent cover is fixed to the end face of a bearing mounting seat of the base frame and axially fixes the bearing placed on the first journal section of the sprocket mounting shaft. The second transparent cover is fixed to the end face of a bearing mounting seat of the base frame and axially fixes the bearing placed on the second journal section of the sprocket mounting shaft. The small shaft passes through the second through cover and is fixedly connected to the center position of the outer end face of the second journal section of the sprocket mounting shaft. The bracket is fixedly connected to the outer end face of the second transparent cover; The rotary encoder is fixed to the bracket; the extended shaft of the rotary encoder is coaxial with the small shaft and circumferentially fixed together. Furthermore, the extended shaft of the planetary reducer is fitted with a keyed blind hole to form a key connection, and the output end of the planetary reducer is fixed to the outer end face of the first transparent cover. Furthermore, the servo motor with brake is fixedly connected to the input end of the planetary reducer and the movement of both is connected; Furthermore, the disc brake mainly includes a hydraulic cylinder, several butterfly springs, two flat-jaw clamps, a base, two transmission arms, two first round pins, two second round pins, and two clamping nuts. The transmission arms are hinged to the base via the first round pins, and the flat-jaw clamps are hinged to the transmission arms via the second round pins. The piston rod of the hydraulic cylinder has a threaded end section at its front end, which passes through the two transmission arms and several butterfly springs. Two clamping nuts are placed on the threaded end section and clamp the two transmission arms and several butterfly springs. The disc brake is fixed to the brake mounting base, and the two flat-jaw clamps are respectively placed on both ends of the brake disc of the double-row sprocket of the sprocket assembly. Furthermore, the oxygen lance loading trolley is composed of a trolley frame, a cross double hinge, an adjusting seat, two externally threaded fisheye rod end joint bearings, two weighing sensors, two first chain joints, eight rollers, eight pins, and sixteen screw bearing pulleys; the main body of the trolley frame is a cuboid structure with a first and second parallel elevation on it, and a single lug plate on the top surface of the trolley frame; four right-angled trapezoidal blocks arranged in a rectangular shape are fixedly welded to the first elevation, and a rectangular groove is provided on each of the four right-angled trapezoidal blocks; two parallel... For the arranged rectangular bars, four sets of threaded through holes are provided on each of the two rectangular bars, with two threaded through holes in each set, for a total of eight threaded through holes; a rectangular through hole is provided near each threaded through hole on each rectangular bar, and four round pin holes are provided on each rectangular bar, with each round pin hole communicating with a rectangular through hole; the eight rollers are respectively installed in the rectangular through holes; the eight pins pass through the round pin holes and one roller respectively and are fixedly connected to the carriage frame, with the rollers and pins forming a rotating pair; the sixteen screw bearing pulleys are respectively fixedly connected to one threaded through hole in the carriage frame; A rectangular plate is provided on the adjusting seat; a single ear plate is fixedly welded to the bottom surface of the rectangular plate, and two double ear plates are fixedly welded to the top surface of the rectangular plate. The cross double hinge is mounted on the single lug plate of the trolley frame and the single lug plate of the adjustment seat and forms a pin connection between them. The two external threaded fisheye rod end joint bearings are respectively mounted on a double ear plate of the adjusting seat to form a pin connection; The first chain connector has an external threaded shaft section and a double ear plate at each end; The two ends of the weighing sensor are respectively installed together with the external threaded fisheye rod end spherical bearing and the external threaded shaft section of the first chain joint to form a threaded connection; Furthermore, the guide rail is provided with a first rectangular guide rail and a second rectangular guide rail; the guide rail is fixed to the rectangular plate of the base frame of the sprocket device, the oxygen lance loading trolley is placed on the guide rail, and the eight rollers and sixteen screw bearing pulleys of the oxygen lance loading trolley wrap around the first rectangular guide rail of the guide rail to form a sliding pair; Furthermore, the counterweight assembly consists of a counterweight block, two pressure plates, and a second chain connector; the counterweight block is a rectangular block structure with a rectangular through groove on one side and two threaded holes on the top surface; the two pressure plates are fixedly connected to the end face of the rectangular through groove of the counterweight block and form a T-slot structure with the rectangular through groove. The second chain connector has an external threaded shaft section and a double ear plate at each end; the external threaded shaft section of the second chain connector is placed in the threaded hole of the counterweight block to form a threaded connection; the rectangular through groove of the counterweight block of the counterweight assembly is placed on the second rectangular guide rail of the guide rail to form a sliding pair; The two sleeve roller chains respectively bypass one sprocket of the double-row sprocket mounted on the sprocket assembly and mesh together to form a chain drive. The two ends of the sleeve roller chains are respectively hinged to the double ear plate one of the first chain joint of the oxygen lance loading trolley and the double ear plate two of the second chain joint of the counterweight assembly. The oxygen lance has an oxygen nozzle at its lower part and two supports welded to its upper part. The supports have two V-shaped slots. The four V-shaped slots of the oxygen lance are respectively placed in a rectangular slot in the trolley frame of the oxygen lance loading trolley to form a snap-fit ​​structure.

[0005] The beneficial effects of this invention are: 1. A sleeve roller chain is used as the transmission mechanism to realize the lifting and lowering movement of the oxygen blowing pipe. The counterweight end is lightweight and the structure is compact.

[0006] 2. The oxygen blowing pipe is lifted and lowered by a double chain and an automatic force adjustment mechanism, which improves the reliability of the lifting and lowering movement and ensures that the two chains are evenly stressed.

[0007] 3. The dual-insurance braking arrangement, which combines a servo motor with a holding brake and a disc brake, occupies little space and has high braking reliability. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0009] Figure 2 This is a three-dimensional exploded view of the sprocket device of this utility model.

[0010] Figure 3 This is a three-dimensional schematic diagram of the disc brake of this utility model.

[0011] Figure 4 This is a three-dimensional schematic diagram of the oxygen lance loading trolley of this utility model.

[0012] Figure 5 This is a three-dimensional exploded view of the oxygen lance loading trolley of this utility model.

[0013] Figure 6 This is a three-dimensional exploded view of the counterweight block of this utility model.

[0014] Figure 7 This is a schematic diagram of the structure of the oxygen lance of this utility model; In the attached diagram, the components represented by each number are as follows: 1. Sprocket assembly; 11. First through cover; 12. Two bearings; 13. Base frame; 131. Rectangular plate; 132. Rectangular hole; 133. Ear plate; 134. Bearing mounting seat; 135. Brake mounting seat; 14. Separable fixing clamp; 15. Double row sprocket; 15. Sprocket; 151. Brake disc; 152. Keyway through hole; 153. Sprocket mounting shaft; 16. First journal section; 161. Second journal section; 162. Wheel seat shaft section; 163. Keyway blind hole. 64. Keyway 165. Flat Key 17. Second Through Cover 18. Small Shaft 19. Bracket 110. Rotary Encoder 111. Planetary Reducer 2. Servo Motor with Brake 3. Disc Brake 4. Hydraulic Cylinder 41. Piston Rod 411. Threaded End Section 412. Butterfly Spring 42. Flat Jaw Clamp 43. Base 44. Force Transmission Arm 45. First Round Pin 46. Second Round Pin 47. Compression Nut 48. Oxygen Lance Loading Trolley 5. Trolley Frame 5 1. First elevation 511, Second elevation 512, Right-angled trapezoidal block 513, Rectangular groove 514, Rectangular bar 515, Threaded through hole 516, Rectangular through hole 517, Round pin hole 518, Single ear plate 519, Cross double hinge 52, Adjusting seat 53, Rectangular plate 531, Single ear plate 532, Double ear plate 533, External threaded fisheye rod end joint bearing 54, Weighing sensor 55, First chain joint 56, External threaded shaft segment 5 61. Double ear plate 1; 562. Roller; 57. Pin; 58. Screw bearing pulley; 59. Guide rail; 6. First rectangular guide rail; 61. Second rectangular guide rail; 62. Counterweight assembly; 7. Counterweight block; 71. Rectangular through groove; 711. Threaded hole; 712. Pressure plate; 72. Second chain joint; 73. External threaded shaft section 2; 731. Double ear plate 2; 732. Two sleeve roller chains; 8. Oxygen lance; 9. Oxygen nozzle; 91. Support; 92. V-groove; 921. Detailed Implementation

[0015] Please see Figure 1 As shown, this utility model consists of a sprocket device 1, a planetary reducer 2, a servo motor with a holding brake 3, a disc brake 4, an oxygen lance loading trolley 5, a guide rail 6, a counterweight assembly 7, two sleeve roller chains 8, and an oxygen lance 9. Please see Figure 1 , Figure 2As shown, the sprocket device 1 consists of a first through cover 11, two bearings 12, a base frame 13, a separable fixing clamp 14, a double-row sprocket 15, a sprocket mounting shaft 16, a flat key 17, a second through cover 18, a small shaft 19, a bracket 110, and a rotary encoder 111. The base frame 13 has a rectangular plate 131 with a rectangular hole 132 at its center. An ear plate 133 is welded to the top surface of the rectangular plate 131 on both sides of the long side of the rectangular hole 132. Two bearing mounting seats 134 are respectively provided on the outer sides of the two ear plates 133. A brake mounting seat 135 is welded to the top surface of the rectangular plate 131 on one side of the short side of the rectangular hole 132. The double-row sprocket 15 has a rotating structure, with a sprocket 151 at each end and a brake disc 152 located between the two sprockets 151. A keyed through hole 153 is located at the center of the double-row sprocket 15. The sprocket mounting shaft 16 has a first journal section 161 and a second journal section 162 at each end. A wheel seat shaft section 163 connects to the first journal section 161. A keyed blind hole 164 is located at the center of the outer end face of the first journal section 161, and a keyway 165 is provided on the wheel seat shaft section 163. A flat key 17 is mounted on the keyway 165 of the sprocket mounting shaft 16, and the wheel seat shaft section 163 of the sprocket mounting shaft 16 is mounted on the double-row sprocket 15. A keyed connection is formed within the keyway through-hole 153. A separable retaining ring 14 is mounted on the wheel seat section 163 of the sprocket mounting shaft 16 and axially fixes the double-row sprockets 15. The inner rings of two bearings 12 are respectively mounted on the first journal section 161 and the second journal section 162 of the sprocket mounting shaft 16. The outer rings of two bearings 12 are respectively mounted in a bearing mounting seat 134 of the base frame 13. A first through cover 11 is fixed to the end face of a bearing mounting seat 134 of the base frame 13 and axially fixes the bearing 12 mounted on the first journal section 161 of the sprocket mounting shaft 16. A second through cover 18 is fixed to the end face of a bearing mounting seat 134 of the base frame 13 and axially fixes the bearing 12 mounted on the first journal section 161 of the sprocket mounting shaft 16. The bearing 12 on the second journal section 162 of shaft 16 is axially fixed; the small shaft 19 passes through the second cover 18 and is fixed to the center of the outer end face of the second journal section 162 of the sprocket mounting shaft 16; the bracket 110 is fixed to the outer end face of the second cover 18; the rotary encoder 111 is fixed to the bracket 110; the extension shaft of the rotary encoder 111 is coaxial with the small shaft 19 and circumferentially fixed together; the extension shaft of the planetary reducer 2 is placed in the keyway blind hole 164 of the sprocket mounting shaft 16 of the sprocket device 1 to form a key connection; the output end of the planetary reducer 2 is fixed to the outer end face of the first cover 11; the servo motor 3 with brake is fixed to the input end of the planetary reducer 2 and connects the movement of the two. Please see Figures 1 to 3As shown, the disc brake 4 mainly includes a hydraulic cylinder 41, several disc springs 42, two flat-jaw clamps 43, a base 44, two transmission arms 45, two first round pins 46, two second round pins 47, and two clamping nuts 48. The transmission arms 45 are hinged to the base 44 via the first round pins 46, and the flat-jaw clamps 43 are hinged to the transmission arms 45 via the second round pins 47. The piston rod 411 of the hydraulic cylinder 41 has a threaded end section 412 at its front end, and the piston rod 411 passes through the two transmission arms 45 and several disc springs. Spring 42 and two locking nuts 48 are placed on the end thread section 412 and press the two transmission arms 45 and several butterfly springs 42; the several butterfly springs 42 provide power for the two flat jaw clamps 43 to clamp inward, and the hydraulic cylinder 41 pulls back and can open the two flat jaw clamps 43 outward through the transmission arms; the disc brake 4 is fixed to the brake mounting seat 135 of the base frame 13 of the sprocket device 1, and the two flat jaw clamps 43 of the disc brake 4 are respectively placed on the two ends of the brake disc 152 of the double row sprocket 15 of the sprocket device 1; The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention; obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] Example 1 Please see Figure 1 , Figure 3 , Figure 4As shown, the oxygen lance loading trolley 5 consists of a trolley frame 51, a cross double hinge 52, an adjusting seat 53, two externally threaded fisheye rod end joint bearings 54, two weighing sensors 55, two first chain joints 56, eight rollers 57, eight pins 58, and sixteen screw bearing pulleys 59. The main body of the trolley frame 51 is a cuboid structure with a first vertical surface 511 and a second vertical surface 512 that are parallel to each other. Four right-angled trapezoidal blocks 513 distributed in a rectangular shape are fixedly welded on the first vertical surface 511. Each of the four right-angled trapezoidal blocks 513 is provided with a rectangular groove 514. The second vertical surface 512 is fixedly welded with... Two rectangular bars 515 are arranged opposite each other. Each rectangular bar 515 has four sets of two threaded through holes 516, totaling eight. Near each threaded through hole 516, a rectangular through hole 517 is provided on each rectangular bar 515. Four round pin holes 518 are provided on each rectangular bar 515, each round pin hole 518 communicating with a rectangular through hole 517. A single lug plate 519 is provided on the top surface of the trolley frame 51. Eight rollers 57 are respectively installed in one of the rectangular through holes 517 of the trolley frame 51. Eight pins 58 pass through one round pin hole 518 and one roller 57 of the trolley frame 51 and are fixedly connected. On the trolley frame 51, rollers 57 and pins 58 form a rotating pair; sixteen screw bearing pulleys 59 are respectively fixedly connected to a threaded through hole 516 in the trolley frame 51; a rectangular plate 531 is provided on the adjusting seat 53, a single ear plate 532 is fixedly welded on the bottom surface of the rectangular plate 531, and two double ear plates 533 are fixedly welded on the top surface of the rectangular plate 531; a cross double hinge 52 is placed on the single ear plate 519 of the trolley frame 51 and the single ear plate 532 of the adjusting seat 53 and forms a pin connection between them; two external threaded fisheye rod end spherical bearings 54 are respectively placed on a double ear plate 533 of the adjusting seat 53 to form a pin connection; The first chain joint 56 has an external threaded shaft section 561 and a double ear plate 562 at both ends; the two ends of the weighing sensor 55 are respectively installed together with the external threaded fisheye rod end joint bearing 54 and the external threaded shaft section 561 of the first chain joint 56 to form a threaded connection; the guide rail 6 is provided with a first rectangular guide rail 61 and a second rectangular guide rail 62. The guide rail 6 is fixed to the rectangular plate 131 of the base frame 13 of the sprocket device 1. The oxygen lance loading trolley 5 is placed on the guide rail 6. The eight rollers 57 and sixteen screw bearing pulleys 59 of the oxygen lance loading trolley 5 wrap around the first rectangular guide rail 61 of the guide rail 6 to form a sliding pair.

[0017] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, the counterweight assembly 7 consists of a counterweight block 71, two pressure plates 72, and a second chain connector 73. The counterweight block 71 has a rectangular block structure, with a rectangular through groove 711 on one side and two threaded holes 712 on the top surface. The two pressure plates 72 are fixed to the end faces of the rectangular through groove 711 of the counterweight block 71, forming a T-slot structure with the rectangular through groove 711. The second chain connector 73 has an external threaded shaft section 731 and a double ear plate 732 at each end. Section 731 is installed in the threaded hole 712 of the counterweight 71 to form a threaded connection; the rectangular through groove 711 of the counterweight 71 of the counterweight assembly 7 is installed on the second rectangular guide rail 62 of the guide rail 6 to form a sliding pair; two sleeve roller chains 8 respectively pass around one sprocket 151 of the double row sprockets 15 installed on the sprocket device 1 and mesh together to form a chain drive; the two ends of the sleeve roller chains 8 are respectively hinged to the double ear plate 562 of the first chain joint 56 of the oxygen lance loading trolley 5 and the double ear plate 732 of the second chain joint 73 of the counterweight assembly 7. Please see Figure 1 , Figure 3 , Figure 6 As shown, the oxygen lance 9 has an oxygen nozzle 91 at its lower part and two supports 92 welded to its upper part. The supports 92 have two V-shaped slots 921. The four V-shaped slots 921 of the oxygen lance 9 are respectively placed in a rectangular slot 514 of the trolley frame 51 of the oxygen lance loading trolley 5 to form a snap-fit ​​structure.

[0018] The working principle of this embodiment: This embodiment consists of a sprocket assembly, a planetary reducer, a servo motor with a brake, a disc brake, an oxygen lance loading trolley, a guide rail, a counterweight assembly, two sleeve roller chains, and an oxygen lance. The sprocket assembly mainly includes double-row sprockets, a sprocket mounting shaft, and a base frame. Each end of the double-row sprockets has a sprocket, and a brake disc is positioned between the two sprockets. The double-row sprockets are mounted on the sprocket mounting shaft, which is supported on the base frame of the sprocket assembly. The extended shaft of the planetary reducer is keyed to the sprocket mounting shaft. The servo motor with brake is mounted together with the planetary reducer and is connected to it for mutual motion. The servo motor with brake provides the power source for this embodiment. The planetary reducer functions as a speed changer and transmits motion and power. The two sleeve roller chains each pass around one sprocket of the double-row sprocket assembly and mesh together to form a chain drive. The two ends of the sleeve roller chains are connected to the oxygen lance. The first chain joint of the loading trolley and the second chain joint of the counterweight assembly are hinged together. The oxygen lance loading trolley is mainly equipped with a cross double hinge, an adjusting seat, two external threaded spherical rod end joint bearings, two load cells, eight rollers, and sixteen screw bearing pulleys. The cross double hinge, adjusting seat, and two external threaded spherical rod end joint bearings form an automatic force adjustment mechanism, which can balance the tension on the two sleeve roller chains. The two load cells can monitor the magnitude of the tension on the two sleeve roller chains, thereby detecting whether the two sleeve roller chains are in failure. The two external threaded spherical rod end joint bearings can prevent additional bending of the load cells. The torque is used to protect the weighing sensor; the oxygen lance is mounted on the oxygen lance loading trolley; the disc brake mainly consists of a hydraulic cylinder, several butterfly springs, and two flat-jaw clamps. The disc brake is mounted on the sprocket assembly, and the two flat-jaw clamps of the disc brake are respectively mounted on both ends of the brake disc of the double-row sprocket of the sprocket assembly. The disc brake is normally closed. When the hydraulic cylinder is pulled back, the power provided by the hydraulic cylinder compresses the butterfly springs, causing the two flat-jaw clamps of the disc brake to open, and the double-row sprocket of the sprocket assembly can rotate. When the hydraulic cylinder is unloaded, under the elastic force of the butterfly springs, the two flat-jaw clamps of the disc brake clamp inward to the two ends of the brake disc of the double-row sprocket, thus achieving the desired rotation. The braking effect of the double-row sprockets is as follows: When the servo motor with the brake is activated, it drives the double-row sprockets of the sprocket device to rotate through the planetary reducer. Then, through the chain drive, it drives the oxygen lance loading trolley and the oxygen lance mounted on it to achieve up and down movement. The main function of the counterweight component is to apply appropriate preload to the chain drive to prevent tooth skipping during chain drive, while also serving as a counterweight. The guide rail is provided with a first rectangular guide rail and a second rectangular guide rail. The eight rollers and sixteen screw bearing pulleys on the oxygen lance loading trolley wrap around the first rectangular guide rail of the guide rail to form a sliding pair. Since this sliding pair is rolling friction, it helps to reduce friction and improve the smoothness of the lifting and lowering movement of the oxygen lance loading trolley.A rectangular through slot is provided on the counterweight block of the counterweight assembly. This rectangular through slot is placed on the second rectangular guide rail of the guide rail to form a sliding pair. This sliding pair is used to constrain the trajectory of the counterweight assembly's vertical lifting movement. In this embodiment, the servo motor with its own brake and the disc brake provide dual braking, ensuring reliable braking of the sprocket. A rotary encoder is connected to the sprocket mounting shaft to monitor the lifting position of the oxygen lance loading trolley in real time. Under the control system, the oxygen lance loading trolley can accurately stop at each working point. This embodiment uses a sleeve roller chain as the transmission mechanism to achieve the lifting movement of the oxygen lance. The counterweight end is lightweight and the structure is compact. The dual chains jointly pull the lifting movement of the oxygen lance, and the automatic force adjustment mechanism improves the reliability of the lifting movement and ensures uniform force distribution on both chains. The dual-insurance braking arrangement, combining a servo motor with a brake and a disc brake, occupies little space and has high braking reliability.

[0019] In summary, this utility model discloses an oxygen lance lifting device, which mainly comprises a sprocket assembly, a planetary reducer, a servo motor with a brake, a disc brake, an oxygen lance loading trolley, a guide rail, a counterweight assembly, and two sleeve roller chains. The technical solution of this utility model uses sleeve roller chains as the transmission mechanism to achieve the lifting and lowering movement of the oxygen lance. The counterweight end is lightweight and the structure is compact. The two chains jointly pull the lifting and lowering movement of the oxygen lance, and an automatic force adjustment mechanism automatically adjusts the force on the two chains, ensuring uniform force distribution and good safety. The double-insurance braking arrangement combining a servo motor with a brake and a disc brake occupies little space and has high braking reliability.

[0020] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific implementation methods described.

Claims

1. A lifting device for an oxygen blowing pipe, characterized in that, include: Sprocket assembly, planetary reducer, servo motor with brake, disc brake, oxygen lance loading trolley, guide rail, counterweight assembly, sleeve roller chain and oxygen lance; The sprocket assembly includes a bearing, a base frame, double-row sprockets, a sprocket mounting shaft, and a rotary encoder. A rectangular plate is mounted on the base frame, and a bearing mounting seat and a brake mounting seat are provided on the rectangular plate. The double-row sprockets are mounted on the sprocket mounting shaft, which is supported by bearings on the bearing mounting seats. A brake disc is provided in the middle of the double-row sprockets. The rotary encoder is driven by the sprocket mounting shaft to detect the rotation state. The servo motor with brake is connected to the planetary reducer, and the planetary reducer is connected to the sprocket mounting shaft to drive its rotation. The disc brake is mounted on the brake mounting seat of the base frame, and the disc brake is provided with a flat-jaw clamp to connect the brake disc of the double-row sprocket to achieve braking. The oxygen lance loading trolley is equipped with eight rollers and sixteen screw bearing pulleys, which together with the first rectangular guide rail form a moving pair. The oxygen lance is mounted on the oxygen lance loading trolley with a snap-fit ​​structure. The oxygen lance loading trolley is equipped with a weighing sensor. The counterweight assembly and the second rectangular guide rail of the guide rail form a sliding pair; The sleeve roller chain passes around the double-row sprockets, and its two ends are respectively hinged to the oxygen lance loading trolley and the counterweight assembly to form a chain drive to achieve linkage lifting between the two.

2. The oxygen blowing pipe lifting device according to claim 1, characterized in that, The sprocket assembly comprises a first through cover, bearings, a base frame, a separable fixing clamp, double-row sprockets, a sprocket mounting shaft, a flat key, a second through cover, a small shaft, a bracket, and a rotary encoder. The base frame includes a rectangular plate with a rectangular hole at its center. An ear plate is welded to the top surface of the rectangular plate on each side of the long side of the rectangular hole. Two bearing mounting seats are respectively provided on the outer sides of the two ear plates. A brake mounting seat is welded to the top surface of the rectangular plate on the short side of the rectangular hole. The double-row sprocket has a rotating body structure, with a sprocket at each end and a keyed through hole at the axis of the double-row sprocket; a brake disc is located between the two sprockets. The sprocket mounting shaft has a first journal section and a second journal section at both ends; the first journal section is connected to the wheel seat shaft section, and a blind hole with a keyway is provided at the center of the outer end face of the first journal section; a keyway is provided on the wheel seat shaft section. The flat key is mounted on the keyway of the sprocket mounting shaft; the wheel seat section of the sprocket mounting shaft is mounted in the keyway through hole of the double-row sprocket to form a key connection; The separate fixing clamp is placed on the wheel seat shaft section of the sprocket mounting shaft and axially fixes the double-row sprockets; The inner rings of the two bearings are respectively mounted on the first journal section and the second journal section of the sprocket mounting shaft, and the outer rings of the two bearings are respectively mounted in a bearing mounting seat of the base frame; The first transparent cover is fixed to the end face of a bearing mounting seat of the base frame and axially fixes the bearing placed on the first journal section of the sprocket mounting shaft. The second transparent cover is fixed to the end face of a bearing mounting seat of the base frame and axially fixes the bearing placed on the second journal section of the sprocket mounting shaft. The small shaft passes through the second through cover and is fixedly connected to the center position of the outer end face of the second journal section of the sprocket mounting shaft. The bracket is fixedly connected to the outer end face of the second transparent cover; The rotary encoder is fixed to the bracket; the extended shaft of the rotary encoder is coaxial with the small shaft and circumferentially fixed together.

3. The oxygen blowing pipe lifting device according to claim 1, characterized in that: Place The extended shaft of the planetary reducer is installed in a keyed blind hole to form a key connection, and the output end of the planetary reducer is fixed to the outer end face of the first transparent cover.

4. The oxygen blowing pipe lifting device according to claim 1, characterized in that: The servo motor with brake is fixed to the input end of the planetary reducer and the movement of the two is connected.

5. The oxygen blowing pipe lifting device according to claim 1, characterized in that: The disc brake mainly includes a hydraulic cylinder, several butterfly springs, two flat-jaw clamps, a base, two transmission arms, two first round pins, two second round pins, and two clamping nuts. The transmission arms are hinged to the base via the first round pins, and the flat-jaw clamps are hinged to the transmission arms via the second round pins. The piston rod of the hydraulic cylinder has a threaded end section at its front end. The piston rod passes through the two transmission arms and several butterfly springs. Two clamping nuts are placed on the threaded end section and clamp the two transmission arms and several butterfly springs. The disc brake is fixed to the brake mounting base, and the two flat-jaw clamps are respectively placed on both ends of the brake disc of the double-row sprocket of the sprocket assembly.

6. The oxygen blowing pipe lifting device according to claim 1, characterized in that: The oxygen lance loading trolley consists of a trolley frame, a cross-shaped double hinge, an adjusting seat, two externally threaded fisheye rod end joint bearings, two weighing sensors, two first chain joints, eight rollers, eight pins, and sixteen screw bearing pulleys. The main body of the trolley frame is a cuboid structure with a first and second parallel elevation. A single lug plate is provided on the top surface of the trolley frame. Four right-angled trapezoidal blocks arranged in a rectangular pattern are fixedly welded to the first elevation, and a rectangular groove is provided on each of the four right-angled trapezoidal blocks. Two oppositely arranged... The device comprises two rectangular bars, each with four sets of threaded through holes, each set containing two threaded through holes, for a total of eight threaded through holes. Near each threaded through hole, a rectangular through hole is provided on each rectangular bar. Four round pin holes are provided on each rectangular bar, each pin hole communicating with a rectangular through hole. Eight rollers are respectively housed within the rectangular through holes. Eight pins pass through each pin hole and one roller, and are fixedly connected to the trolley frame, forming a rotating pair with the rollers and pins. Sixteen screw bearing pulleys are each fixedly connected to a threaded through hole in the trolley frame. A rectangular plate is provided on the adjusting seat; a single ear plate is fixedly welded to the bottom surface of the rectangular plate, and two double ear plates are fixedly welded to the top surface of the rectangular plate. The cross double hinge is mounted on the single lug plate of the trolley frame and the single lug plate of the adjustment seat and forms a pin connection between them. The two external threaded fisheye rod end joint bearings are respectively mounted on a double ear plate of the adjusting seat to form a pin connection; The first chain connector has an external threaded shaft section and a double ear plate at each end; The two ends of the weighing sensor are respectively installed together with the external threaded fisheye rod end spherical bearing and the external threaded shaft section of the first chain joint to form a threaded connection.

7. The oxygen blowing pipe lifting device according to claim 1, characterized in that: The guide rail is provided with a first rectangular guide rail and a second rectangular guide rail; the guide rail is fixed to the rectangular plate of the base frame of the sprocket device, the oxygen lance loading trolley is placed on the guide rail, and the eight rollers and sixteen screw bearing pulleys of the oxygen lance loading trolley wrap around the first rectangular guide rail of the guide rail to form a sliding pair.

8. The oxygen blowing pipe lifting device according to claim 1, characterized in that: The counterweight assembly consists of a counterweight block, two pressure plates, and a second chain connector. The counterweight block has a rectangular block structure with a rectangular through groove on one side and two threaded holes on the top surface. The two pressure plates are fixed to the end face of the rectangular through groove of the counterweight block and form a T-slot structure with the rectangular through groove. The second chain joint has an external threaded shaft section and a double ear plate at each end; the external threaded shaft section of the second chain joint is placed in the threaded hole of the counterweight block to form a threaded connection; the rectangular through groove of the counterweight block of the counterweight assembly is placed on the second rectangular guide rail of the guide rail to form a sliding pair; the two sleeve roller chains respectively pass around one sprocket of the double row sprocket of the sprocket device and mesh together to form a chain drive, and the two ends of the sleeve roller chains are respectively hinged to the double ear plate of the first chain joint of the oxygen lance loading trolley and the double ear plate of the second chain joint of the counterweight assembly; the oxygen lance has an oxygen nozzle at its lower part and two supports are fixedly welded to its upper part, and two V-shaped slots are provided on the supports; the four V-shaped slots of the oxygen lance are respectively placed in a rectangular slot of the trolley frame of the oxygen lance loading trolley to form a snap-fit ​​structure.

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