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CN-121974229-A - Electric permanent magnet lifting appliance for preventing hot rolling plate opening lifting damage and use method

CN121974229ACN 121974229 ACN121974229 ACN 121974229ACN-121974229-A

Abstract

The invention belongs to the technical field of lifting of steel plates of pressure vessels, and particularly relates to an electro-permanent magnet lifting appliance for preventing hot rolling plate lifting damage and a use method thereof. The electric permanent magnet lifting appliance comprises a main beam and at least one electric permanent magnet which is lifted on the main beam through an iron chain, wherein the electric permanent magnet is of a cuboid structure, a set of lifting assembly is respectively arranged on two long side surfaces, a set of driving mechanism is respectively arranged on two short side surfaces, the driving mechanism is connected with a cross rod, two ends of the cross rod are respectively connected with a set of moving branched chains, the moving branched chains are connected with the lifting assembly, the lifting assembly comprises a lifting beam, a copper plate and a lifting guide rod, the copper plate is fixed on the lower side of the lifting beam, the lifting guide rod is arranged on the upper side of the lifting beam, the lifting guide rod and the electric permanent magnet form a lifting kinematic pair, and the driving mechanism is linked with the moving branched chains to realize the upper position and lower position switching of the lifting assembly. The invention uses the low-hardness copper plate to contact the steel plate to avoid scratch, has no magnetic path gap, ensures magnetic force, realizes stable operation through the reinforcement and buffer structure, and has simple structure and low cost.

Inventors

  • WANG MEIQIAN

Assignees

  • 湖南千豪机电技术开发有限公司

Dates

Publication Date
20260505
Application Date
20260316

Claims (9)

  1. 1. The electric permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage comprises a main beam (2) and at least one electric permanent magnet (3) which is lifted on the main beam (2) through an iron chain (4), and is characterized in that the electric permanent magnet (3) is of a cuboid structure, two long side surfaces of the electric permanent magnet are respectively provided with a set of lifting components (8), two short side surfaces of the electric permanent magnet are respectively provided with a set of driving mechanism, the output end of the driving mechanism is connected with the middle part of a cross rod (6), and the length direction of the cross rod (6) is consistent with the width direction of the electric permanent magnet (3); The lifting assembly (8) comprises a lifting beam (801), a copper plate (802) and lifting guide rods (803), wherein the copper plate (802) is fixedly installed on the lower side of the lifting beam (801), at least two lifting guide rods (803) are arranged on the upper side of the lifting beam (801), lifting guide rods (803) and the electric permanent magnets (3) form lifting kinematic pairs, the upper position and the lower position of the lifting assembly (8) are switched under the linkage of the driving mechanism and the movement branched chains, when the lifting assembly (8) is in a lower position, the lower surface of the copper plate (802) is lower than the lower surface of the electric permanent magnets (3), the copper plate (802) is firstly contacted with the high-temperature steel plate (1) to play a protective role, and when the lifting assembly (8) is in an upper position, the lower surface of the copper plate (802) is higher than the lower surface of the electric permanent magnets (3) or is flush with the lower surface of the electric permanent magnets (3), so that the electric permanent magnets (3) are attached to the high-temperature steel plate (1) to be adsorbed.
  2. 2. The electro-permanent magnetic lifting appliance for preventing hot rolling flat plate lifting damage according to claim 1, wherein the moving branched chain comprises an inclined push rod (7), an upper connecting rod (9) and a lower connecting rod (10), wherein the upper end of the upper connecting rod (9) is hinged with the electro-permanent magnet (3), the lower end of the upper connecting rod (9) is hinged with the upper end of the lower connecting rod (10), the lower end of the lower connecting rod (10) is hinged with a lifting beam (801) of the lifting assembly (8), the upper end of the inclined push rod (7) is hinged with the end part of the cross rod (6), and the lower end of the inclined push rod (7) is coaxially hinged with the hinge point of the upper connecting rod (9) and the lower connecting rod (10).
  3. 3. The electric permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage according to claim 2, wherein the upper connecting rod (9) is kept in a vertical state and is in contact with the electric permanent magnet (3) at the inner side when the lifting assembly (8) is in a lower position, the lower connecting rod (10) is not in line with the upper connecting rod (9), and the lower end of the lower connecting rod (10) is inclined to the outer side.
  4. 4. An electro-permanent magnet lifting appliance for preventing hot rolling open plate lifting damage according to claim 3, characterized in that the included angle between the lower connecting rod (10) and the upper connecting rod (9) is 2.82 degrees.
  5. 5. An electro-permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage according to claim 3, wherein during lifting operation, an included angle between the lower connecting rod (10) and the upper connecting rod (9) is eliminated through driving force of the driving mechanism, so that the lower connecting rod (10) and the upper connecting rod (9) are collinear, then the electro-permanent magnet lifting appliance is unfolded from a collinear instability point to a large angle, and the electro-permanent magnet (3) forms a load acceleration process by means of self weight, so that the electro-permanent magnet (3) stably falls and is attached to a high-temperature steel plate (1).
  6. 6. The electro-permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage according to claim 1, wherein the driving mechanism comprises a cylinder (5), a cylinder body (501) of the cylinder (5) is installed on the electro-permanent magnet (3) through a cylinder seat, a cylinder rod (502) of the cylinder (5) is connected with the middle part of the cross rod (6), and the falling speed and acceleration of the electro-permanent magnet (3) are controlled through the cylinder (5).
  7. 7. The electro-permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage according to claim 1, wherein five groups of electro-permanent magnets (3) are arranged on the main beam (2), and the length direction of the electro-permanent magnets (3) is orthogonal with the length direction of the main beam (2).
  8. 8. A method of using the electro-permanent magnet hanger for preventing hot rolling slab lifting damage according to claim 4 or 5, comprising the steps of: Step S1, adjusting the lifting assembly (8) to a lower state through a driving mechanism, and controlling the main beam (2) to run to the position right above the high-temperature steel plate (1) at a high speed through a travelling crane; Step S2, maintaining the lower state of the lifting assembly (8), controlling the electric permanent magnet (3) to descend by the crane, and in the shaking process of the electric permanent magnet (3), firstly contacting the lower surface of the copper plate (802) with the high-temperature steel plate (1) and stopping descending, wherein the lifting assemblies (8) at two sides prevent the electric permanent magnet (3) from shaking; Step S3, starting a driving mechanism, driving a lifting assembly (8) to switch states, driving a cross rod (6) to move downwards by the driving mechanism, gradually changing an initial included angle state of an upper connecting rod (9) and a lower connecting rod (10) to be collinear by moving branched chain transmission, and realizing a boosting process, wherein an electro-permanent magnet (3) is lifted by a small section of height relative to a high-temperature steel plate (1); s4, continuously driving by a driving mechanism, converting an upper connecting rod (9) and a lower connecting rod (10) from a collinear instability point to a large angle, forming a load acceleration process by the electro-permanent magnet (3) through dead weight, and lowering the electro-permanent magnet (3) by a large section of height relative to the high-temperature steel plate (1); and S5, after the electro-permanent magnet (3) is attached to the high-temperature steel plate (1), starting the electro-permanent magnet (3) to adsorb the high-temperature steel plate (1) so as to finish lifting preparation.
  9. 9. The method for using the electro-permanent magnetic lifting appliance for preventing the hot rolling flat plate lifting damage according to claim 8, wherein the driving mechanism is a cylinder (5); In the step S4, in the descending process of the electro-permanent magnet (3) relative to the high-temperature steel plate (1), the gas in the air cylinder (5) forms instant vacuum to realize buffering, and the dropping speed and the acceleration of the electro-permanent magnet (3) are controlled through a speed regulating valve of the air cylinder (5).

Description

Electric permanent magnet lifting appliance for preventing hot rolling plate opening lifting damage and use method Technical Field The invention belongs to the technical field of lifting of steel plates of pressure vessels, and particularly relates to an electric permanent magnet lifting appliance for preventing lifting damage of hot rolling open plates and a use method thereof Background The steel plate of the pressure vessel has the problems of collision, rubbing, collision and scratch due to the process specificity, the conventional lifting temperature reaches 300 ℃, and meanwhile, the production operation has clear requirements on the lifting beat. The existing pressure vessel steel plate lifting method is characterized in that lifting electromagnets are matched with high-temperature-resistant canvas to wrap magnetic poles, so that steel plate damage is avoided, but the technology has the remarkable defects that on one hand, the high-temperature-resistant canvas is required to ensure wear resistance, the thickness is generally more than 2mm, a gap of 2mm is formed between the electromagnet magnetic poles and the steel plate, the magnetic force of the electromagnets is reduced by about 1/3, lifting performance is seriously affected, lifting safety is lowered, on the other hand, the falling process of the main beam electromagnets is easy to shake, the steel plate is in single-point contact with the electromagnets, and even if the canvas is wrapped, the problems of collision, friction and scratch are still difficult to avoid, and the lifting process requirements of the pressure vessel steel plate cannot be met. Disclosure of Invention Aiming at the problems, the invention aims to provide an electric permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage and a use method thereof, which effectively solve the technical problems that magnetic force is influenced by wrapping magnetic poles with high-temperature resistant canvas, a steel plate is easy to scratch, an electromagnet falls and shakes to cause single-point contact damage and the like, and realize safe and damage-free lifting of the steel plate of the high-temperature pressure container. In order to achieve the above purpose, the present invention adopts the following technical scheme: The invention provides an electric permanent magnet lifting appliance for preventing hot rolling flat plate lifting damage, which comprises a main beam and at least one electric permanent magnet which is lifted on the main beam through an iron chain, wherein the electric permanent magnet is of a cuboid structure, two long side surfaces of the electric permanent magnet are respectively provided with a set of lifting assembly, two short side surfaces of the electric permanent magnet are respectively provided with a set of driving mechanism, the output end of the driving mechanism is connected with the middle part of a transverse rod, the length direction of the transverse rod is consistent with the width direction of the electric permanent magnet, two ends of the transverse rod are respectively connected with a set of symmetrically arranged moving branched chains, the two sets of moving branched chains are respectively connected with two sets of lifting assemblies, each lifting assembly comprises a lifting beam, a copper plate and lifting guide rods, wherein the lower side of the lifting beam is fixedly provided with the copper plate, the upper side of the lifting beam is provided with at least two lifting guide rods, the lifting guide rods and the electric permanent magnet form a lifting motion pair, the upper position and the lower position of the lifting assembly are switched under the linkage of the driving mechanism and the moving branched chains, the lower surface of the copper plate is lower than the lower surface of the electric permanent magnet, the lower surface of the copper plate is firstly contacted with the high-temperature steel plate to play a protection role in the upper position, and the lower surface of the lifting assembly is higher than the lower surface of the electric permanent magnet or is flush with the lower surface of the electric permanent magnet, and the high-temperature permanent magnet is attached to the high-temperature permanent magnet. The motion branched chain comprises an inclined push rod, an upper connecting rod and a lower connecting rod, wherein the upper end of the upper connecting rod is hinged with the electric permanent magnet, the lower end of the upper connecting rod is hinged with the upper end of the lower connecting rod, the lower end of the lower connecting rod is hinged with a lifting beam of the lifting assembly, the upper end of the inclined push rod is hinged with the end part of the cross rod, and the lower end of the inclined push rod is coaxially hinged with a hinge point of the upper connecting rod and the lower connecting rod. When the lifting assembly is in a lower position, the u