A ladle wall coating tool for repairing working linings.

Abstract

This utility model relates to the field of metallurgical equipment maintenance technology, and in particular to a ladle lining repair tool, comprising: a rotary motor, four retractable connecting brackets, an arc-shaped applicator, and an electronic ruler. The output shaft of the rotary motor is vertically downward. The four retractable connecting brackets are fixed around the housing of the rotary motor in a 90° annular arrangement. The arc-shaped applicator is hinged to the end of each connecting bracket via universal joints. The electronic ruler is integrated into the surface of the telescopic mechanism of the connecting bracket. The rotary motor is a four-channel split drive structure, with each channel independently controlling the swing motion of the corresponding connecting bracket. The four channels of the motor independently adjust the telescopic amount of the brackets in each direction (e.g., 20mm to the east / 30mm to the south) to achieve differentiated repair of different areas of the ladle lining. The rotary motor drives the applicator to move in a uniform circular motion, eliminating the wavy lines caused by manual application.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment maintenance technology, and in particular to a ladle wall coating tool for repairing the working lining of a steel ladle. Background Technology

[0002] As a core thermal equipment in metallurgical production, the working lining of the ladle directly withstands the erosion of molten steel at temperatures exceeding 1600℃, chemical corrosion from slag, and periodic thermal stress impacts. Statistics show that working lining maintenance costs account for 60%-75% of the total operating expenses of the ladle, and the quality of repairs directly determines the lifespan of the ladle and the cleanliness of the molten steel.

[0003] Traditional steel ladle repair methods mainly rely on manual application of refractory mortar using a scraper, which has the following drawbacks:

[0004] Imbalance in thickness control: Workers' reliance on experience led to thickness deviations of ±8mm in different areas of the bale wall. Premature erosion in thin areas caused bale penetration accidents, while thick areas developed cracks due to sintering shrinkage.

[0005] The work is extremely risky: workers need to enter the steel ladle where the temperature is ≥65℃ to work. In the past three years, the industry has recorded a heatstroke accident rate of up to 1.7 cases per 10,000 tons of steel.

[0006] Although semi-automated equipment such as rotary coating machines has emerged, fundamental defects remain. Existing rotary coating machines mainly fall into three categories: single-arm rotary, hydraulic pusher, and robotic arm. Single-arm rotary machines offer uniform thickness in the circumferential direction but cannot achieve axial segmentation, leading to premature failure in the slag line area and reduced lifespan. Hydraulic pusher machines lack real-time thickness feedback mechanisms, resulting in significant deviations between actual and set thicknesses. Robotic arm machines are expensive. Therefore, this application provides a ladle wall coating tool for repairing ladle working linings. Utility Model Content

[0007] To overcome the shortcomings of the existing technology, this utility model provides a ladle wall coating tool for repairing steel ladle working lining. The tool uses a four-channel motor to independently adjust the extension and retraction of the support in each direction (e.g., 20mm to the east / 30mm to the south) to achieve differentiated repair of different areas of the ladle wall. The rotary motor drives the coating plate to move in a uniform circular motion, eliminating the wavy lines caused by manual coating.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a ladle wall coating tool for repairing steel ladle working lining, comprising: a rotary motor, four retractable connecting brackets, an arc-shaped coating plate, and an electronic ruler. The output shaft of the rotary motor is vertically downward. The four retractable connecting brackets are fixed around the housing of the rotary motor in a 90° annular distribution. The arc-shaped coating plate is hinged to the end of each connecting bracket via a universal joint. The electronic ruler is integrated into the surface of the telescopic mechanism of the connecting bracket. The rotary motor is a four-channel split drive structure, and each channel independently controls the swinging motion of the corresponding connecting bracket.

[0009] Furthermore, the link bracket includes a servo hydraulic cylinder and a stainless steel sleeve fitted over it, with a telescopic stroke range of 800-1500mm.

[0010] Furthermore, the electronic ruler has a measurement accuracy of ±0.1mm and establishes a communication connection with an external PLC controller via a wireless transmission module.

[0011] Furthermore, the radius of curvature of the arc-shaped coating plate is 1800-2500mm, and its working surface is provided with tungsten carbide wear-resistant blocks arranged in a matrix.

[0012] Furthermore, the thickness of the tungsten carbide wear-resistant block is 15-25mm, and the spacing between adjacent wear-resistant blocks is 10-15mm.

[0013] Furthermore, the four output shafts of the rotary motor are respectively connected to harmonic reducers, and the output end of the reducers drives the corresponding linked brackets to swing through a crank-connecting rod mechanism.

[0014] Furthermore, the swing amplitude of the crank-connecting rod mechanism is adjustable within a range of ±30°, and the swing frequency is 5-20 times / minute.

[0015] Furthermore, it also includes a material level sensor, which is set on the upper surface of the arc-shaped coating plate to monitor the remaining amount of refractory material in real time.

[0016] Furthermore, a safety limit switch is provided at the base of the connecting bracket, which automatically cuts off the motor power when the bracket's extension or retraction exceeds a set threshold.

[0017] Furthermore, the overall height of the application tool is 2500-3500mm, and the maximum working diameter is φ3000-φ4000mm.

[0018] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0019] 1. The extension and retraction of the brackets in each direction can be independently adjusted by a four-channel motor (e.g., 20mm to the east / 30mm to the south) to achieve differentiated repair of different areas of the wall.

[0020] 2. A rotating motor drives the coating plate to move in a uniform circular motion, eliminating the wavy lines caused by manual coating. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the ladle wall coating tool for repairing the working lining of a steel ladle according to this utility model.

[0022] Figure 2 This is a schematic diagram of the working state structure of the ladle wall coating tool for repairing the working lining of a steel ladle according to this utility model.

[0023] Among them: 1. Rotary motor; 2. Link bracket; 3. Arc-shaped coating plate; 4. Electronic ruler. Detailed Implementation

[0024] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0025] Example:

[0026] Combination Figure 1 and Figure 2As shown, this utility model provides a ladle wall coating tool for repairing steel ladle working linings, including: a rotary motor 1, four telescopic connecting brackets 2, an arc-shaped coating plate 3, and an electronic ruler 4. The output shaft of the rotary motor 1 is vertically downward; the four telescopic connecting brackets 2 are fixed around the housing of the rotary motor 1 in a 90° annular arrangement, and the arc-shaped coating plate 3 is hinged to the end of each connecting bracket 2 via universal joints. The electronic ruler 4 is integrated into the telescopic mechanism surface of the connecting bracket 2; wherein, the rotary motor 1 is a four-channel split drive structure, and each channel independently controls the swinging motion of the corresponding connecting bracket 2. The rotary motor 1 is a four-channel servo motor (model: SGM7G-4). 4A, rated torque 120N·m), each channel is independently connected to a harmonic reducer (reduction ratio 1:50), the telescopic mechanism of the connecting bracket 2 adopts a three-stage hydraulic cylinder (stroke 800-1500mm, thrust 12 tons), the cylinder body is covered with a heat-resistant stainless steel sleeve (material: S31008, thickness 8mm), the radius of curvature of the arc-shaped coating plate 3 is R=2200mm (suitable for 200-ton steel ladle), 96 tungsten carbide wear-resistant blocks are welded on the working surface (size: 20mm×20mm×20mm, spacing 12mm), the electronic ruler 4 adopts a magnetic grating displacement sensor (accuracy ±0.05mm), and transmits wirelessly to the HMI control terminal via ZigBee.

[0027] The connecting bracket 2 includes a servo hydraulic cylinder and a stainless steel sleeve fitted over it, with a telescopic stroke range of 800-1500mm.

[0028] The electronic ruler 4 has a measurement accuracy of ±0.1mm and establishes a communication connection with an external PLC controller through a wireless transmission module.

[0029] The radius of curvature of the arc-shaped coating plate 3 is 1800-2500mm, and its working surface is provided with tungsten carbide wear-resistant blocks arranged in a matrix.

[0030] The thickness of the tungsten carbide wear-resistant blocks is 15-25mm, and the spacing between adjacent wear-resistant blocks is 10-15mm.

[0031] The four output shafts of the rotary motor 1 are connected to the harmonic reducer, and the output end of the reducer drives the corresponding connecting bracket 2 to swing through the crank-connecting rod mechanism.

[0032] The swing amplitude of the crank-connecting rod mechanism is adjustable within a range of ±30°, and the swing frequency is 5-20 times / minute.

[0033] It also includes a material level sensor, which is set on the upper surface of the arc-shaped coating plate 3, for real-time monitoring of the remaining amount of refractory material.

[0034] A safety limit switch is provided at the base of the connecting bracket 2. When the extension or retraction of the bracket exceeds the set threshold, the motor power is automatically cut off.

[0035] The application tool has a height of 2500-3500mm and a maximum working diameter of φ3000-φ4000mm.

[0036] The tool is vertically hoisted into the ladle at a temperature ≤80℃ using a bridge crane. The deviation between the axis of the rotary motor 1 and the center axis of the ladle is ≤3mm, calibrated using a laser alignment instrument. The zonal repair parameters are input into the HMI control terminal. The hydraulic system drives four sets of connecting supports 2 to extend and retract synchronously to the target position. The electronic ruler 4 provides real-time data feedback. The crank connecting rod runs unloaded for 2 cycles to verify that the swing angle error is ≤0.5°. The pneumatic conveying system injects refractory mortar into the arc-shaped iron plate 3 at a rate of 15kg / min. The material level sensor maintains the material thickness at 30±2mm. The motor 1 rotates at a uniform speed of 10±0.2r / min. Each revolution of the tool completes: circumferential coverage area: 3.14×D (D=ladle diameter). The axial feed is achieved by the swing mechanism at 8mm / revolution. The supports synchronously retract to the safe position of 800mm. The rotary motor 1 slows down to 3r / min and runs for 30 seconds to eliminate material dripping. After the tool is hoisted out, the ladle wall scanning 3D laser scanner is automatically started to detect the thickness.

[0037] Precise zone control: The extension and retraction of the brackets in each direction can be independently adjusted by a four-channel motor (e.g., 20mm to the east / 30mm to the south) to achieve differentiated repair of different areas of the wall.

[0038] Automated operation: A rotary motor drives the coating plate to move in a uniform circular motion, eliminating the wavy lines caused by manual application.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ladle wall painting tool for repairing a steel ladle working lining, characterized by, include: The rotary motor (1), four retractable connecting brackets (2), an arc-shaped applicator (3), and an electronic ruler (4) are provided. The output shaft of the rotary motor (1) is set vertically downward. The four retractable connecting brackets (2) are fixed around the housing of the rotary motor (1) in a 90° annular distribution. The arc-shaped applicator (3) is hinged to the end of each connecting bracket (2) by a universal joint. The electronic ruler (4) is integrated into the surface of the telescopic mechanism of the connecting bracket (2). The rotary motor (1) is a four-channel split drive structure, and each channel independently controls the swinging action of the corresponding connecting bracket (2).

2. The ladle wall painting tool for repairing a steel ladle working lining according to claim 1, characterized in that: The link bracket (2) includes a servo hydraulic cylinder and a stainless steel sleeve fitted on its outside, with a telescopic stroke range of 800-1500mm.

3. The ladle wall painting tool for repairing a working lining of a ladle according to claim 2, characterized in that: The electronic ruler (4) has a measurement accuracy of ±0.1mm and establishes a communication connection with an external PLC controller through a wireless transmission module.

4. The ladle wall painting tool for repairing a steel ladle working lining according to claim 1, characterized in that: The radius of curvature of the arc-shaped coating plate (3) is 1800-2500mm, and its working surface is provided with tungsten carbide wear-resistant blocks arranged in a matrix.

5. The ladle wall coating tool for repairing the working lining of a steel ladle according to claim 4, characterized in that: The thickness of the tungsten carbide wear-resistant block is 15-25mm, and the spacing between adjacent wear-resistant blocks is 10-15mm.

6. The ladle wall painting tool for repairing a steel ladle working lining according to claim 1, characterized in that: The four output shafts of the rotary motor (1) are respectively connected to the harmonic reducer, and the output end of the reducer drives the corresponding connecting bracket (2) to swing through the crank-connecting rod mechanism.

7. The ladle wall painting tool for repairing a working lining of a ladle according to claim 6, characterized in that: The swing amplitude of the crank-connecting rod mechanism is adjustable within a range of ±30°, and the swing frequency is 5-20 times / minute.

8. The ladle wall painting tool for repairing a steel ladle working lining according to claim 1, characterized in that: It also includes a material level sensor, which is set on the upper surface of the arc-shaped coating plate (3) for real-time monitoring of the remaining amount of refractory material.

9. The ladle wall painting tool for repairing a steel ladle working lining according to claim 1, characterized in that: The root of the connecting bracket (2) is equipped with a safety limit switch, which automatically cuts off the motor power when the bracket's extension exceeds the set threshold.

10. A ladle wall painting tool for patching of steel ladle linings according to any one of claims 1 - 9, characterized in that: The overall height of the applicator is 2500-3500mm, and the maximum working diameter is φ3000-φ4000mm.

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