RU102936U1 - ELECTROMAGNETIC LIFTING DEVICE - Google Patents

Abstract

 An electromagnetic lifting device containing a beam, which is a spatial structure with a group of beams, carrying a group of electromagnets suspended from them on chains, damping elements, each of which is connected to a corresponding electromagnet and having a damping value setting, characterized in that each beam is connected to the beam through a movable rod passing through its center and the yoke, on which it is spring loaded with a damping element having a damping value setting, and on b Alke is equipped with a regulator of its position on the rod, moreover, said beam has a regulator of the angle of inclination of the electromagnet and a limiter for moving the electromagnet relative to the beam in a vertical plane, with each electromagnet made in the form of a rectangular parallelepiped and suspended on two chains.

Description

This utility model relates to lifting and handling equipment used for lifting and transporting ferromagnetic materials, such as metal sheets or plates, having a wide range of geometric dimensions (length, width, thickness) in the steel processing industry, namely, metallurgical plants, shipbuilding factories. Under their conditions, it is extremely important to have an electromagnetic lifting device adapted to use the safe transportation of ferromagnetic materials having a wavy or irregular surface or subject to bending. The latter is most often observed when the steel rolling mill is removed from the rolling table when its temperature reaches + 650 degrees, which significantly increases its plastic properties and promotes deformation under its own weight, leading to significant deviations from the horizontal plane of the transported material.

It is well known that for this purpose groups of electromagnets of round or rectangular shape of a large size were usually used in comparison with the size of the ferromagnetic material being lifted, when the contact area of the load with the electromagnets is much smaller than the area of the sheets of large sizes. However, this was unsuccessful, since it was not possible to achieve effective contact between the flat surface of a single electromagnet and the wavy surface of the steel sheet, and this contact was also unsuccessful when the cantilever part of the sheet was bent.

An attempt was made to rectify the situation. For this (Japanese Patent No. 80052/1973 and No. 16363/1972), a device equipped with magnets that could be located on a wave-like surface of a metal rolling sheet was proposed. Such a magnet or magnets were made with the possibility of fitting the wavy surface of the sheet, which was achieved thanks to deformable chambers, since they were made of elastic material and filled with ferromagnetic powder and attached to an electromagnet to increase its contact with a metal surface. But there were problems - a short service life, a decrease in magnetic force.

From US Pat. No. 3,773,185 of 11/20/1973, a flexible magnetic beam for a crane is known. In essence, it is an electromagnetic lifting device. It contains a bridge on which two trolleys moving along it are located. From each trolley, a rod passes through the bridge, having the ability to rise and fall due to the mechanism on the trolley and to the lower part having a beam beam, at the ends of which electromagnets are hinged,

This device allows due to the mobility of bogies and swaying rockers on the rods, as well as by moving the rods up and down, to position the surface of the electromagnets along the bends of the surface of the transported steel sheet. However, such a device is not able to reliably select all the waveforms of the rolled sheet, especially when the sheet after rolling has a temperature of the order of +650 degrees.

Known used by the company "SKANVEIR" (see the annex to the application or website http://www.skanveir.com/). This electromagnetic lifting device contains a traverse, which is a spatial structure with a group of beams connected rigidly to it, with electromagnets suspended from the beams on the chains, damping elements, each of which is connected to the corresponding chain and has a damping value setting, while the electromagnets are round in shape , and each of them is suspended on its beam on three chains.

This well-known technical solution is selected as a prototype, since it has the largest number of essential features that coincide with the essential features of the claimed utility model. In addition, the aforementioned known electromagnetic lifting device is one of the last mastered developments on this topic.

However, the prototype has significant disadvantages, which are as follows:

- the difficulty of aligning the supporting surface of all electromagnets horizontally, since it is necessary to adjust the tension of each circuit, i.e. at three points;

- when exhibiting electromagnets on the surface of sheet-rolled material, they are subjected to strong shock loads, which can lead to disruption of electrical contacts with electromagnets;

- under the action of heat from the sheet metal, the horizontal magnets are disrupted, since each damping element behaves differently, as do the corresponding damping controls.

From the analysis of analogues and prototype it follows that for moving metal products of various thicknesses and areas where only minimal deflection or deviation from the plane is allowed, it is rational to use a large number of small electromagnets distributed over the entire area of the transported material. In this case, the sag, skew and deformation are practically eliminated by the correct distribution of magnets on the surface of the plate or sheet, which makes it possible to move sheets of large sizes. However, a large number of rigidly mounted magnets leads to an inefficient use of the carrying capacity of the magnets, as well as to possible deformation under its own weight between the metal and the magnet, due to the wave-like nature of the surface of the metal sheet. This complicates the provision of safe transportation of rolled metal, especially from ferromagnetic materials having a heating temperature of over 650 degrees.

The objective of this utility model is to create a lifting electromagnetic device that can be used in metallurgical plants and shipyards to achieve the following technical results:

- increase the safe transportation of metal from ferromagnetic materials having a wide range of geometric dimensions and a wavy surface or surface of irregular shape or prone to bending,

- simplification of the alignment of the supporting surface of all electromagnets;

- prevention of disturbance of electrical contacts with electromagnets during their installation on the transported sheet.

The problem is solved as follows. In a known electromagnetic lifting device comprising a crosshead, which is a spatial structure with a group of beams carrying a group of electromagnets suspended from them on chains, damping elements, each of which is connected to a corresponding electromagnet and having a damping value setting, according to the present utility model, each beam is connected with a traverse through a movable rod passing through its center and a traverse on which the rod is spring-loaded with a damping element having a setting damping values, and on the beam it is equipped with a regulator of its position on the rod, and the beam has a regulator of the angle of inclination of the electromagnet and a limiter for moving the electromagnet relative to the beam in the vertical plane, each electromagnet is made in the form of a rectangular parallelepiped and suspended on two chains.

Such a new technical solution, with its entire set of essential features, can improve the safety and reliability of transporting rolled metal from ferromagnetic materials, especially those having a heating temperature of over 650 degrees and a wide range of geometric dimensions and wave-like or irregularly shaped or prone to bending surfaces.

This is achieved by the fact that, in order to ensure that all magnets are superimposed on the surface of the captured sheet metal having a wavy, irregular surface, in the proposed device, each rectangular hoisting electromagnet is suspended on two chains, which makes it possible to weaken the chains when the magnets come into contact with the load by lowering the lifting device some and thereby ensure the self-installation of all magnets on the captured load (sheet, plate). To simplify the setup, a damping element located on the rod is used, the damping value of which can be adjusted, as well as the possibility of vertically adjustable beam movement along the rod, and adjusting the angle of inclination of each electromagnet. Thus, the alignment of the position of the group of electromagnets relative to the horizon occurs at two points, while in the prototype all this happens at three points. Moreover, the high temperature of the transported steel sheet does not have a thermal effect on the quality of the preliminary setting of the position of the electromagnets.

The applicant conducted a patent information search on this topic, as a result of which the claimed combination of essential features was not identified. Therefore, the proposed utility model can be recognized as new.

The essence of the claimed utility model and the possibility of its practical implementation is illustrated by the following description and drawings, which depict schemes of the operating positions of the proposed device (Figs. 1, 2, 3) and the installation unit of the electromagnet on the traverse (Fig. 4).

Figure 1 - the device in its original position.

Position 1 - Electromagnet

Position 2 - Damper (spring)

Position 3 - chains (slings)

Position 4 - Traverse

Position 5 - wave-shaped steel-rolling sheet (cargo)

Position 6 - Stem

Position 11 - Beam

Figure 2 - position of the device on the capture sheet.

Position 1 - Electromagnet

Position 2 - Damper (spring)

Position 3 - chains (slings)

Position 4 - Traverse

Position 5 - wave-shaped steel-rolling sheet (cargo)

Position 6 - Stem

Position 11 - Beam

Figure 3 - the lifting position of the steel sheet using the device

Position 5 - wave-shaped steel-rolling sheet (cargo)

Position 6 - Stem

Position 7 - shoulder on the rod 6, in the presence of gaps a, b, c

Figure 4 - site installation of an electromagnet on the traverse

Position 1 - Electromagnet

Position 2 - damping element (spring)

Position 3 - chains (slings)

Position 4 - Traverse

Position 5 - wave-shaped steel-rolling sheet (cargo)

Position 7 - shoulder on the rod 6, in the presence of gaps a, b, c

Position 8 - Nut and Lock Nut

Position 9 - Nut

Position 10 - Lock Nut

Position 11 - Beam

Position 12 - Lever

Position 13 - Bolts

Position 14 - Locknut for Bolts

Position 15 - Limiters

Position 16 - Terminal Box

Position 17 - guide element

Position 18 - beam rotation limiter

The inventive electromagnetic lifting device consists of: a beam 4, which is a spatial structure with a group of beams 11, bearing a group of electromagnets suspended from them on chains 3 of each electromagnet 1. Each beam 11 is suspended on a rod 6 with nuts 9 and locknuts 10. The rod 6 passes through the beam 4, and has a damping element 2 on top, each of which is connected to a corresponding electromagnet 1 and having a damping value in the form of nuts 8 and a guide element 17 and a shoulder 7. The beam 11 is equipped with a regulator of its position on the rod ke 6, in the form of nuts 9 and locknuts 10, located under the beam 11 on the rod 6. In addition, on one of the edges of the beam 11 in the area of fastening of one of the chains 3 there is an angle adjuster for the electromagnet 1 assembled from the lever 12 and bolts 13 and locknuts 14, which fix the position of the lever 12 depending on the angle of inclination of the electromagnet 1. Moreover, each electromagnet 1 has the shape of a rectangle and is suspended from the beam 11 using two chains 3.

The proposed device operates as follows. To ensure that all magnets are superimposed on the surface of the captured sheet metal having a wave-like, irregular surface, in the proposed device, each hoisting electromagnet 1 of a rectangular shape is suspended on two chains 3. This makes it possible to weaken the chains 3 by contacting the magnets 1 with load 5 by lowering the lifting device some and thereby provide for the self-installation of all electromagnets 1 on the trapped load 5 (sheet, plate). After the self-installation of electromagnets 1, only those magnets that are in contact with the transported cargo 5 are turned on. The lifting mechanism is then turned on and the lifting device (not shown in the drawing) starts to move upward, choosing the slack of chains 3 of each electromagnet 1. As the degree of tension of chains 3 is selected, until the load 5 is lifted, individual deformation of the damping element 2 (springs) of each electromagnet 1 will occur. Moreover, the springs 2 are pre-compressed with a force slightly exceeding the weight lektromagnita 1 and the rod 6 mounted on springs 2 (Figure 4). Adjusting the location of the working planes of the electromagnets 1 in one horizontal plane is carried out using nuts 9, 10 (figure 4) and bolts 13, 14 (figure 4). That is, the electromagnets 1 are installed horizontally by changing the angle of their inclination, and their synchronous movement in a vertical position is performed using beams 11.

When the electromagnets are located on a gripping steel sheet 5, all electromagnets have a weakened circuit 3 (FIG. 2). The springs 2 are compressed by a preliminary tightening force of the nuts 8. The stops 7 of the rods 6 are in contact with the supporting surfaces of the crosshead 4 (figure 2). Next, the power supply of the magnets 1 located on the load 5 (figure 3). The beam 11 with the help of a crane (not shown in the drawing) moves up. Chain 3 of each electromagnet 1 selects slack and pulls. Then, each spring 2 is individually deformed until the load 5 comes off the base. In this case, gaps a, b, c arise between the shoulders 7 of the rods 6 and the supporting surfaces of the crosshead 4, the values of which correspond to the individual deformation (settlement) of the springs 2 of each electromagnet 1.

Thus, the proposed device is a constructive set of the following elements, in which the beam 11 has a hole in the central part, through which the rod 6 passes, which also passes through the hole in the beam 4. The position of the beam 11 on the rod 6 is adjusted using nuts and locknuts 8, 9, 10. In addition, to compensate for inaccuracies and deviations along the length of the chains 3 at one end of the beam 11 there is a pivotally mounted regulator 12, the position of which can be changed using bolts 13 and fixed locknuts 14. To protect the electrical terminal box 16 from being struck while the lifting device 4 is being applied to the load 5, the loosening of the chains 3 is limited by the clearance, the size of which is obviously greater than the unevenness of the load surface 5. A guide member 18 is mounted on the beam 11, which interacts with the hole in the crosshead 4, and preventing the beam 11 from turning relative to the sheet 6. The rod 6 through the guide element 17 is supported by a spring 2 and is fastened with nuts 8, due to which the spring is pre-tensioned by Well h, corresponding force somewhat greater than the total weight of all the elements of the suspension of the electromagnet, the rod 7 bead 6 is a guaranteed contact with the support surface

Thus, the technical result of the inventive lifting electromagnetic device is achieved, which consists in increasing the safety and reliability of transporting metal from ferromagnetic materials having a wide range of geometric dimensions and a wavy or irregular surface or subject to bending, simplifying the alignment process of the supporting surface of all electromagnets, preventing violation electrical contacts with electromagnets, exclusion of dependence egulirovaniya settings electromagnets from captured cargo temperature.

Claims (1)

An electromagnetic lifting device containing a beam, which is a spatial structure with a group of beams carrying a group of electromagnets suspended from them on chains, damping elements, each of which is connected to a corresponding electromagnet and having a damping value setting, characterized in that each beam is connected to the beam through a movable rod passing through its center and the yoke, on which it is spring loaded with a damping element having a damping value setting, and on b Alke is equipped with a regulator of its position on the rod, moreover, said beam has a regulator of the angle of inclination of the electromagnet and a limiter for moving the electromagnet relative to the beam in a vertical plane, with each electromagnet made in the form of a rectangular parallelepiped and suspended on two chains.