Ladle long nozzle replacing device of continuous casting machine

Abstract

The invention discloses a continuous casting machine steel ladle long nozzle replacement device, and relates to the technical field of continuous casting machine long nozzle replacement. The device comprises a stand column, the bottom end of the stand column is rotatably installed on a bag watching platform through a rotary supporting mechanism, and a supporting arm is arranged at the top end. And a lifting driving mechanism is arranged on the upright post and is connected with a hoisting frame below through guide wheels at two ends of a supporting arm by a steel wire rope. The lifting driving mechanism drives the lifting frame to ascend and descend, the stand column rotates to drive the lifting frame to horizontally rotate, and therefore mechanical transfer of the long nozzle between the material taking position and the mounting position is achieved. The rotary supporting mechanism adopts a double-deep groove ball bearing structure, so that stable rotation is ensured; the lifting frame is provided with a clamping ring mechanism, so that the long nozzle can be quickly and reliably fixed. Manual carrying is effectively replaced, the labor intensity and the safety risk of high-temperature operation are remarkably reduced, and the replacement efficiency and the operation safety are improved.

Description

Technical Field

[0001] This invention relates to the field of long nozzle replacement technology for continuous casting machines, specifically a long nozzle replacement device for a continuous casting machine ladle. Background Technology

[0002] In continuous casting production, the long nozzle of the ladle is a key component for protective casting. Due to its constant exposure to the high-temperature impact of flowing steel, the long nozzle has a short service life and requires frequent replacement. Currently, replacement is typically done manually. However, the long nozzle is heavy, usually weighing around 80 kg, and its installation location is cramped and close to the high-temperature tundish, making operation extremely inconvenient. Manual handling is not only labor-intensive but also poses safety hazards such as slipping and burns. Furthermore, after being hoisted to the ladle monitoring platform by an overhead crane, the long nozzle still needs to be manually lifted to the top of the long nozzle robotic arm support and then vertically placed into the support. This process is time-consuming, labor-intensive, and inefficient. Therefore, there is an urgent need to develop a specialized device that can replace manual handling and achieve safe and efficient replacement of the long nozzle. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned problems, thereby providing a continuous casting machine ladle long nozzle replacement device that effectively reduces the labor intensity of workers and eliminates safety hazards.

[0004] The technical solution adopted by the present invention to solve the aforementioned problem is as follows: A long nozzle replacement device for a continuous casting machine ladle includes a column. A rotating support mechanism is provided at the bottom of the column, and the column is rotatably mounted on the top surface of a ladle viewing platform via the rotating support mechanism. A horizontal support arm is provided at the top of the column, and a lifting drive mechanism is provided on the column. The lifting drive mechanism is connected to a wire rope, and the other end of the wire rope extends downwards after passing through guide wheels at both ends of the support arm. A hoisting frame for supporting and fixing the long nozzle is connected below the end of the support arm. The lifting drive mechanism drives the hoisting frame to move up and down via the wire rope and guide wheels. The column rotates around its own axis to drive the hoisting frame to rotate horizontally, realizing the transfer of the long nozzle between the material handling position and the installation position.

[0005] Furthermore, the rotating support mechanism includes a bearing housing, a connecting shaft, and at least one set of rolling bearings; one end of the connecting shaft is fixedly connected to the column, and the other end is installed in the bearing housing through the rolling bearing; the bearing housing is fixedly connected to the bag-viewing platform; providing stable support for the rotational movement of the column, which helps to ensure the smoothness and structural reliability of the column during rotation.

[0006] Furthermore, the rolling bearing is a deep groove ball bearing, and there are two sets of them, which are arranged at intervals along the axial direction of the connecting shaft; a spacer sleeve is provided between the two sets of deep groove ball bearings; the end of the connecting shaft is also provided with a lock nut for fixing the bearing; this improves the stress condition of the connecting shaft, distributes the radial load, and enhances the service life of the bearing and the stability of the entire rotating mechanism.

[0007] Furthermore, a pressure cap is provided above the bearing housing, and the pressure cap is fixed to the end of the bearing housing by bolts, pressing the rolling bearing into the bearing housing; a sealing felt strip is provided between the pressure cap and the connecting shaft; the rolling bearing is pressed and limited in the housing, and the sealing felt strip provided between the pressure cap and the connecting shaft can block external impurities from entering the bearing to a certain extent, which helps to maintain the cleanliness of the bearing.

[0008] Furthermore, the bearing housing is provided with a lubricating oil nozzle that communicates with the interior of the bearing housing; this facilitates the replenishment of lubricating grease to the bearing and helps reduce bearing wear.

[0009] Furthermore, the lifting drive mechanism is a hand-cranked self-locking winch with a two-way self-locking function; the self-locking feature helps to prevent the wire rope from accidentally retracting or loosening during lifting or stopping, thereby providing a certain degree of safety for hoisting long water inlets and making the operation process more controllable.

[0010] Furthermore, the hoisting frame includes a frame body and a retaining ring mechanism located at the lower part of the frame body; the frame body has an internal accommodating space for accommodating the head of the long nozzle; the retaining ring mechanism has an annular space for accommodating the neck of the long nozzle, and the inner diameter of the annular space is larger than the outer diameter of the body of the long nozzle and smaller than the outer diameter of the head of the long nozzle; during hoisting, the long nozzle is effectively axially limited to prevent it from falling out from below, thereby improving the stability of hoisting.

[0011] Furthermore, the retaining ring mechanism includes a fixed retaining ring and a movable retaining ring; the fixed retaining ring is fixedly connected to the frame body; one end of the movable retaining ring is hinged to the fixed retaining ring, and the other end is detachably connected to the fixed retaining ring via a pin; this facilitates the quick mounting and dismounting of the long nozzle and improves operational convenience.

[0012] Furthermore, an oblique support is provided between the support arm and the column; this enhances the rigidity of the connection area between the support arm and the column, helps resist the bending moment generated by the load, and ensures the overall structural stability.

[0013] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: This invention achieves mechanized transfer of long sprues between the material handling position and the installation position by setting up a column that can rotate around its own axis and a hoisting frame that is driven by a lifting mechanism through steel wire ropes and guide wheels. It replaces manual handling and positioning, and operators can remotely control the hoisting and positioning of long sprues from a relatively safe and convenient position. This helps to reduce the labor intensity of workers and reduce the safety risks of slipping and burning caused by direct contact with heavy objects and proximity to high temperature sources, while improving the efficiency of replacement operations. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the bearing housing structure in an embodiment of the present invention; Figure 3 This is a top view of the bearing housing in an embodiment of the present invention; Figure 4 This is a schematic diagram of the main structure of the pressure cap in an embodiment of the present invention; Figure 5 This is a top view of the pressure cap structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the main structure of the hoisting frame according to an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 Schematic diagram of the cross-sectional structure of AA; The components in the diagram are labeled as follows: 1. Viewing platform; 2. Rotary support mechanism; 3. Column; 4. Support arm; 5. Lifting drive mechanism; 6. Operating lever; 7. Guide wheel; 8. Wire rope; 9. Lifting frame; 10. Long sprue; 11. Long sprue manipulator; 21. Bearing housing; 25. Pressure cap; 91. Frame body; 92. Clamping ring mechanism; 921. Fixed clamping ring; 922. Movable clamping ring. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments, which are intended only to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0016] See Figures 1-6A long nozzle replacement device for a continuous casting machine ladle includes a column 3. A rotating support mechanism 2 is provided at the bottom of the column 3, and the column 3 is rotatably mounted on the top surface of a ladle viewing platform 1 via the rotating support mechanism 2. A horizontal support arm 4 is provided at the top of the column 3. A lifting drive mechanism 5 is provided on the column 3, and a wire rope 8 is connected to the lifting drive mechanism 5. The other end of the wire rope 8 extends downwards after passing through guide wheels 7 at both ends of the support arm 4, and a hoisting frame 9 for supporting and fixing the long nozzle 10 is connected below the end of the support arm 4. A detachable anti-detachment baffle is provided on the mounting seat of the guide wheel 7. An operating rod 6 for controlling the rotation of the column 3 is also provided on the column 3, and the operating rod 6 is vertically fixed to the column 3. The lifting drive mechanism 5 drives the hoisting frame 9 to move up and down via the wire rope 8 and the guide wheels 7. The column 3 rotates around its own axis to drive the hoisting frame 9 to rotate horizontally, realizing the transfer of the long nozzle 10 between the material handling position and the installation position.

[0017] The rotating support mechanism 2 includes a bearing housing 21, a connecting shaft, and at least one set of rolling bearings; one end of the connecting shaft is fixedly connected to the column 3, and the other end is installed in the bearing housing 21 through the rolling bearing; the bearing housing 21 is fixedly connected to the bag-viewing platform 1; it provides stable support for the rotational movement of the column 3, which helps to ensure the stability and structural reliability of the column 3 when it rotates.

[0018] The rolling bearings are deep groove ball bearings, and there are two sets of them, which are arranged at intervals along the axial direction of the connecting shaft; a spacer sleeve is provided between the two sets of deep groove ball bearings; the end of the connecting shaft is also provided with a lock nut for fixing the bearings; the stress condition of the connecting shaft is improved, the radial load is distributed, and the service life of the bearings and the stability of the entire rotating mechanism are improved.

[0019] A pressure cover 25 is provided on the top of the bearing housing 21. The pressure cover 25 is fixed to the end of the bearing housing 21 by bolts and presses the rolling bearing into the bearing housing 21. A sealing felt strip is provided between the pressure cover 25 and the connecting shaft. The rolling bearing is pressed and limited in the housing. At the same time, the sealing felt strip provided between the pressure cover 25 and the connecting shaft can block external impurities from entering the bearing to a certain extent, which helps to maintain the cleanliness of the bearing.

[0020] The bearing housing 21 is provided with a lubricating oil injection nozzle that communicates with the interior of the bearing housing 21; this facilitates the replenishment of lubricating grease to the bearing and helps reduce bearing wear.

[0021] The lifting drive mechanism 5 is a hand-cranked self-locking winch with a two-way self-locking function; the self-locking feature helps to prevent the wire rope 8 from accidentally retracting or loosening during lifting or stopping, thereby providing a certain degree of safety for hoisting the long water inlet 10 and making the operation process more controllable.

[0022] The hoisting frame 9 includes a frame body 91 and a retaining ring mechanism 92 located at the lower part of the frame body 91. The frame body 91 has an internal accommodating space for accommodating the head of the long sprue 10. The retaining ring mechanism 92 has an annular space for accommodating the neck of the long sprue 10, and the inner diameter of the annular space is larger than the outer diameter of the body of the long sprue 10 and smaller than the outer diameter of the head of the long sprue 10. During hoisting, the long sprue 10 is effectively axially limited to prevent it from coming out from below, thereby improving the stability of hoisting.

[0023] The retaining ring mechanism 92 includes a fixed retaining ring 921 and a movable retaining ring 922; the fixed retaining ring 921 is fixedly connected to the frame body 91; one end of the movable retaining ring 922 is hinged to the fixed retaining ring 921, and the other end is detachably connected to the fixed retaining ring 921 via a pin; this facilitates the quick mounting and dismounting of the long water inlet 10 and improves operational convenience.

[0024] An oblique support is also provided between the support arm 4 and the column 3; this enhances the rigidity of the connection area between the support arm 4 and the column 3, helps to resist the bending moment generated by the load, and ensures the overall structural stability.

[0025] The working process is as follows: First, the operator uses an overhead crane to hoist the long sprue 10 to the material handling position on the bagging platform 1. Then, the operator cranks the lifting drive mechanism 5 (hand-cranked self-locking winch) to release the wire rope 8, causing the hoisting frame 9 to descend to a suitable height. Next, the operator manually opens the movable shackle 922 of the shackle mechanism 92, placing the head of the long sprue 10 into the internal receiving space of the frame body 91, so that its neck is located in the annular space formed by the closed fixed shackle 921 and movable shackle 922, and locks the pin to complete the fixation of the long sprue 10. Subsequently, the operator cranks the lifting drive mechanism 5 to retract the wire rope 8, smoothly lifting the long sprue 10, and pushes the operating lever 6 to make the column 3 rotate. The slewing bearing mechanism 2 (which consists of two sets of deep groove ball bearings and spacer sleeves, providing a stable and low-resistance slewing bearing) rotates smoothly around its own axis, horizontally transferring the long nozzle 10 to above the long nozzle manipulator 11 (installation position). During this process, the operator can stay away from the high-temperature intermediate batch, directly solving the safety hazards of high labor intensity, slipping, and burns caused by manual handling in a narrow and high-temperature environment. Finally, the lifting drive mechanism 5 is operated again to slowly lower the long nozzle 10, making it descend precisely and vertically. With the cooperation of another operator, it is placed into the bracket of the long nozzle manipulator 11 to complete the installation. The entire picking, placing, and transferring process is efficient and labor-saving, significantly improving the safety and efficiency of the replacement operation.

[0026] This invention achieves mechanized transfer of long sprues between the material handling position and the installation position by setting up a column that can rotate around its own axis and a hoisting frame that is driven by a lifting mechanism through steel wire ropes and guide wheels. It replaces manual handling and positioning, and operators can remotely control the hoisting and positioning of long sprues from a relatively safe and convenient position. This helps to reduce the labor intensity of workers and reduce the safety risks of slipping and burning caused by direct contact with heavy objects and proximity to high temperature sources, while improving the efficiency of replacement operations.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A continuous caster ladle shroud changing device comprising a column, characterised in that: The bottom end of the column is provided with a rotary supporting mechanism, and the column is rotatably installed on the top surface of the package viewing platform through the rotary supporting mechanism; the top end of the column is provided with a horizontal support arm; a lifting driving mechanism is arranged on the column; a steel wire rope is connected to the lifting driving mechanism; the other end of the steel wire rope extends upwards, is guided by guide wheels arranged at the two ends of the support arm, and then extends downwards; and a lifting frame for carrying and fixing the long nozzle is connected below the ends of the support arm; the lifting driving mechanism drives the lifting frame to move up and down through the steel wire rope and the guide wheels; and the column rotates around its own axis to drive the lifting frame to rotate horizontally, so as to realize the transfer of the long nozzle between the material taking position and the installation position.

2. The apparatus according to claim 1, wherein: The rotary supporting mechanism comprises a bearing seat housing, a connecting shaft and at least one set of rolling bearings; one end of the connecting shaft is fixedly connected to the column, and the other end is installed in the bearing seat housing through the rolling bearings; and the bearing seat housing is fixedly connected to the package viewing platform.

3. The apparatus according to claim 2, wherein: The rolling bearings are deep groove ball bearings, and the number of the deep groove ball bearings is two sets; the two sets of deep groove ball bearings are arranged in an axial direction of the connecting shaft; a spacer sleeve is arranged between the two sets of deep groove ball bearings; and the end of the connecting shaft is further provided with a locking nut for fixing the bearings.

4. The apparatus according to claim 2, wherein: A gland is arranged above the bearing seat housing; the gland is fixed to the end of the bearing seat housing through bolts, and the rolling bearings are pressed in the bearing seat housing; and a sealing felt strip is arranged between the gland and the connecting shaft.

5. The apparatus according to claim 4, wherein: A lubricating oil filler is arranged on the bearing seat housing and communicates with the inside of the bearing seat housing.

6. The apparatus according to claim 1, wherein: The lifting driving mechanism is a hand-operated self-locking winch with a bidirectional self-locking function.

7. The apparatus according to claim 1, wherein: The lifting frame comprises a frame body and a clamping ring mechanism arranged at the lower part of the frame body; the frame body has an internal accommodating space for accommodating the head of the long nozzle; the clamping ring mechanism has an annular space for accommodating the neck of the long nozzle, and the inner diameter of the annular space is greater than the outer diameter of the body of the long nozzle and less than the outer diameter of the head of the long nozzle.

8. The apparatus according to claim 7, wherein: The clamping ring mechanism comprises a fixed clamping ring and a movable clamping ring; the fixed clamping ring is fixedly connected to the frame body; one end of the movable clamping ring is hinged to the fixed clamping ring, and the other end is detachably connected to the fixed clamping ring through a bolt.

9. The apparatus according to claim 1, wherein: An inclined support is further arranged between the support arm and the column.

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