Lifting appliance for flying saucer type large forgings

Abstract

The utility model provides a lifting appliance for a flying saucer type large forge piece, and belongs to the technical field of forge piece lifting appliances. In order to solve the problem that an existing lifting appliance is not enough to lift the flying saucer type large forgings, the lifting appliance for the flying saucer type large forgings comprises a cross beam and two lifting arms, lifting feet are arranged at the ends, away from the cross beam, of the lifting arms, and each lifting foot comprises a connecting section, an external expansion limiting section and a bearing section which are connected in sequence; the connecting section and the suspension arm are connected and located on the same straight line; the external expansion limiting section comprises a top limiting surface and a side limiting surface, the top limiting surface is used for limiting the flying saucer type large forge piece to move in the direction away from the bearing section, the side limiting surface is used for limiting the flying saucer type large forge piece to move in the radial direction, and the side limiting surface and the connecting section are spaced by a first distance in the horizontal direction; the bearing section is perpendicular to the connecting section, and the end, away from the limiting section, of the bearing section is flush with the connecting section. The flying saucer type large forge piece is lifted through the external expansion limiting sections of the lifting feet, and the lifting safety is improved.

Description

Technical Field

[0001] This application relates to the field of forging lifting tools, and more particularly to lifting tools for large forgings in the shape of flying saucers. Background Technology

[0002] With the country's continuous investment in clean energy and its strong emphasis on wind power and nuclear power construction, the manufacturing of large forgings is essential to align with national strategies. However, there have been difficulties and shortcomings in the lifting methods for some ultra-large diameter, irregularly shaped hot forgings, especially saucer-shaped forgings. Existing lifting tools are too small and have low safety. Therefore, this invention improves upon existing lifting tools to provide a feasible solution for lifting ultra-wide, irregularly shaped forgings using short-sized lifting tools. Utility Model Content

[0003] The purpose of this application is to address the problem that existing lifting devices are insufficient for lifting large saucer-shaped forgings. Therefore, this application provides a lifting device for large saucer-shaped forgings. By extending the limiting section of the lifting feet, the lifting diameter is increased compared to existing lifting devices, and the movement of the large saucer-shaped forging away from the bearing section is restricted, thereby achieving the lifting of the large saucer-shaped forging and improving lifting safety.

[0004] This application provides a lifting device for a large saucer-shaped forging, including a crossbeam and two booms symmetrically arranged at both ends of the crossbeam. The ends of the booms away from the crossbeam are provided with lifting feet, and the lifting feet include a connecting section, an outwardly expanding limiting section and a bearing section connected in sequence.

[0005] The connecting section is connected to the boom and is located on the same straight line;

[0006] The outwardly expanding limiting section includes a top limiting surface and a side limiting surface. The top limiting surface is used to restrict the large saucer-shaped forging from moving away from the bearing section. The side limiting surface is used to restrict the large saucer-shaped forging from moving radially. The side limiting surface is separated from the connecting section by a first distance in the horizontal direction.

[0007] The bearing section is arranged perpendicular to the connecting section, and the end of the bearing section away from the limiting section is flush with the connecting section.

[0008] By adopting the above technical solution, the lifting diameter can be increased based on the existing lifting tool by expanding the limiting section of the lifting feet. Specifically, the lifting diameter is increased by a first distance in the horizontal direction between the side limiting surface and the connecting section, thus adapting to the diameter of the large saucer-shaped forging and enabling its lifting. Furthermore, the top limiting surface of the expanding limiting section limits the top surface of the large saucer-shaped forging, thereby restricting its movement away from the bearing section and improving the stability and safety of lifting the large saucer-shaped forging. At the same time, this lifting tool can use the existing lifting beam and boom, only replacing the lifting feet, thus controlling costs.

[0009] In some embodiments, the first distance is 200-250 mm.

[0010] By adopting the above technical solution, the first distance can take into account the lifting size of the large saucer-shaped forging, as well as the performance requirements of the existing crane, beam and boom, and avoid overloading of the lifting feet, which would affect the lifting safety.

[0011] In some embodiments, the outwardly expanding limiting segment is L-shaped, and the two surfaces of the outwardly expanding limiting segment that are connected and perpendicular are the top limiting surface and the side limiting surface, respectively.

[0012] In some embodiments, the bearing section is provided with an anti-slip plate for bearing the circumferential edge of the saucer-shaped large forging. The anti-slip plate includes multiple parallel protrusions, and the protrusions are parallel to the side limiting surface.

[0013] By adopting the above technical solution, by setting an anti-slip plate in the load-bearing section, a certain friction force can be ensured between the load-bearing surface of the lifting foot and the forging, preventing the forging from slipping during transportation; in addition, long-term anti-slip can be ensured by replacing the anti-slip plate, reducing maintenance costs; at the same time, the anti-slip plate adopts multiple convex ridges parallel to the side limiting surface, which can further improve the anti-slip effect.

[0014] In some embodiments, the suspension foot includes two overlapping molded plates, each molded plate including a connecting section, an outwardly expanding limiting section, and a load-bearing section that are sequentially connected and integrally formed;

[0015] The two molded plates are connected by multiple reinforcing ribs, which are arranged horizontally from high to low.

[0016] By adopting the above technical solution, the connecting section, the outward expansion limiting section and the load-bearing section are integrally formed, which can further ensure its strength. In addition, the setting of two forming plates clamping multiple reinforcing ribs can control the weight of the lifting foot while ensuring the overall strength of the lifting foot.

[0017] In some embodiments, the plurality of reinforcing ribs include a first rib plate and a second rib plate, the first rib plate covering the top of the two outwardly expanding limiting sections of the two molded plates, and the second rib plate covering the end faces of the two bearing sections of the two molded plates opposite to the outwardly expanding limiting sections.

[0018] By adopting the above technical solution, the first and second stiffening plates respectively cover the two exposed horizontal surfaces of the suspension foot, which can enhance the strength, reduce the risk of external debris falling or embedding in the suspension foot, and extend the service life of the suspension foot.

[0019] In some embodiments, the connecting section is connected to the boom by a load-bearing pin and welded together.

[0020] By adopting the above technical solution, the crane feet and boom are connected by load-bearing pins, which is convenient to operate. Welding after connection can prevent displacement of the load-bearing pins and improve the stability of the connection between the crane feet and boom as well as the strength of the connection.

[0021] In some embodiments, the boom is rotatably connected to the crossbeam, and the connecting section of the foot is connected to a chain for connecting to the trolley hook, so that the boom and the foot rotate synchronously under the control of the trolley.

[0022] By adopting the above technical solution, the synchronous rotation of the boom and the lifting feet facilitates the loading and unloading of forgings, and the connection between the transmission chain and the lifting feet makes the rotation operation more convenient and stable, further improving the lifting safety.

[0023] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description

[0024] Figure 1 This is a structural diagram of an existing lifting device;

[0025] Figure 2 This is a schematic diagram illustrating the usage status of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the suspension foot in this application;

[0027] Figure 4 This is a front view schematic diagram of the stilt of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Crossbeam;

[0030] 2. Crane boom;

[0031] 3. Hanging foot; 30. Forming plate; 31. Connecting section; 32. Outward expansion limiting section; 321. Top limiting surface; 322. Side limiting surface; 33. Bearing section; 40. Reinforcing rib; 41. First reinforcing plate; 42. Second reinforcing plate; 50. Anti-slip plate; 51. Protruding ridge; 60. Chain;

[0032] 4. Large forgings in the shape of flying saucers. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0034] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] Please see Figure 1 , Figure 1 This is a structural diagram of an existing lifting device.

[0037] The existing lifting equipment, as described in this application, mainly refers to a two-point lifting equipment, which primarily includes a crossbeam 1, two booms 2, and lifting feet 3 located at the ends of the booms 2 via load-bearing pins. The existing lifting feet 3 are straight plates, comprising a connecting section 31 and a load-bearing section 33. Their lifting diameter is the same as the distance between the two booms 2, i.e., the size of the crossbeam 1. The existing lifting equipment has a two-point lifting capacity of 320t and a maximum lifting diameter of 6820mm.

[0038] However, there is a type of large forging in the shape of a flying saucer, with a maximum diameter of 7140mm and a tonnage of 285t. The existing lifting equipment meets the load requirements, but the lifting diameter is not sufficient, so it cannot be lifted.

[0039] Please see Figure 2-4 , Figure 2 This is a schematic diagram illustrating the usage status of this application; Figure 3 This is a schematic diagram of the structure of the hanging leg 3 in this application; Figure 4 This is a front view schematic diagram of the stilt 3 of this application.

[0040] This application provides a lifting device for a large saucer-shaped forging 4, including a crossbeam 1 and two booms 2 symmetrically arranged at both ends of the crossbeam 1, with lifting feet 3 provided at the ends of the booms 2 away from the crossbeam 1.

[0041] The lifting leg 3 includes a connecting section 31, an outward expansion limiting section 32, and a bearing section 33 connected in sequence, which is approximately "bow" shaped. Compared with the existing lifting leg 3, the outward expansion limiting section 32 is added, which increases the lifting diameter based on the existing lifting tool, that is, without changing the working principle and main structure of the original lifting tool, and restricts the movement of the saucer-shaped large forging 4 in the direction away from the bearing section 33, that is, axial displacement, thereby realizing the lifting of the saucer-shaped large forging 4 and improving the lifting safety.

[0042] Specifically, the connecting section 31 is connected to the boom 2 and is located on the same straight line, thereby ensuring the stability of the connection between the foot 3 and the boom 2.

[0043] The outwardly expanding limiting section 32 includes a top limiting surface 321 and a side limiting surface 322. The top limiting surface 321 restricts the movement of the saucer-shaped large forging 4 away from the bearing section 33, while the side limiting surface 322 restricts the radial movement of the saucer-shaped large forging 4, thus improving the hoisting stability and safety of the saucer-shaped large forging 4. In particular, the top limiting surface 321 of the outwardly expanding limiting section 32 cooperates with the bearing surface of the bearing section 33 to lock the saucer-shaped large forging 4, preventing it from tipping over during hoisting and transportation.

[0044] Furthermore, the side limiting surface 322 and the connecting section 31 are separated by a first distance in the horizontal direction, thereby increasing the lifting diameter by a first distance to accommodate the diameter of the large saucer-shaped forging 4 and enabling the lifting of the large saucer-shaped forging 4. Preferably, the first distance is 200-250mm. This first distance can take into account the lifting dimensions of the large saucer-shaped forging 4, as well as the performance requirements of the existing crane, crossbeam 1 and boom 2, and avoid overloading the lifting feet 3, which would affect the lifting safety.

[0045] The load-bearing section 33 is vertically connected to the connecting section 31, and the end of the load-bearing section 33 away from the limiting section is flush with the connecting section 31. This not only controls costs but also further ensures lifting stability and safety.

[0046] It should be noted that the lifting diameter is usually ultimately limited by the size of the crossbeam 1, and changing the crossbeam 1 requires a complete change to the lifting device, which is costly. This lifting device can use the existing crossbeam 1 and boom 2, only replacing the lifting feet 3, thereby further controlling costs.

[0047] It should also be noted that the design of the lifting leg 3 mainly considers the actual size and load of the forging. This lifting leg 3 preferably uses structural alloy steel with high strength, good toughness and plasticity, and excellent high-temperature performance. At the same time, the entire steel plate is gas-cut into an "arch" shape. The cross pin hole size of the original lifting arm 2 is then used for metalworking drilling.

[0048] In one embodiment, the outwardly expanding limiting segment 32 is L-shaped, and the two adjacent and perpendicular surfaces of the outwardly expanding limiting segment 32 are the top limiting surface 321 and the side limiting surface 322, respectively.

[0049] In one embodiment, the bearing section 33 is provided with an anti-slip plate 50 for supporting the circumferential edge of the large saucer-shaped forging 4, which ensures a certain friction between the bearing surface of the lifting foot 3 and the forging, preventing the forging from slipping during transportation. Furthermore, long-term anti-slip properties can be ensured by replacing the anti-slip plate 50, reducing maintenance costs.

[0050] In one specific embodiment, the anti-slip plate 50 includes a plurality of parallel protrusions 51, and the protrusions 51 are parallel to the side limiting surface 322.

[0051] In other alternative implementations, the anti-slip plate 50 includes a plurality of protrusions.

[0052] In one embodiment, the support foot 3 includes two overlapping molded plates 30. Each molded plate 30 includes a connecting section 31, an outwardly expanding limiting section 32, and a load-bearing section 33 that are sequentially connected and integrally formed. The two molded plates 30 are connected by a plurality of reinforcing ribs 40, which are arranged horizontally from high to low.

[0053] In this method, the connecting section 31, the outward expansion limiting section 32, and the bearing section 33 are integrally formed, which can further ensure their strength. Furthermore, the arrangement of two forming plates 30 clamping multiple reinforcing ribs 40 can control the weight of the hanging foot 3 while ensuring the overall strength of the hanging foot 3.

[0054] In one embodiment, the plurality of reinforcing ribs 40 include a first rib plate 41 and a second rib plate 42. The first rib plate 41 covers the top of the two outwardly expanding limiting sections 32 of the two molded plates 30, and the second rib plate 42 covers the end faces of the two bearing sections 33 of the two molded plates 30 facing away from the outwardly expanding limiting sections 32. That is, the first rib plate 41 and the second rib plate 42 respectively cover the two exposed horizontal surfaces of the hanging foot 3. While achieving enhanced strength, this can reduce the risk of external debris falling or embedding inside the hanging foot 3 and extend the service life of the hanging foot 3.

[0055] In one embodiment, the connecting section 31 is connected to the boom 2 via a load-bearing pin and then welded. This connection of the foot 3 and boom 2 via the load-bearing pin is convenient, and welding after connection prevents displacement of the load-bearing pin, improving the stability and strength of the connection between the foot 3 and boom 2. For example, the ends of the load-bearing pin can be repaired by welding with φ25mm round steel.

[0056] In one embodiment, the boom 2 is rotatably connected to the crossbeam 1, and the connecting section 31 of the lifting foot 3 is connected to a chain 60. The chain 60 is used to connect to the trolley hook, so that the boom 2 and the lifting foot 3 rotate synchronously under the control of the trolley. The synchronous rotation of the boom 2 and the lifting foot 3 facilitates the loading and unloading of forgings by the lifting device. The connection between the transmission chain 60 and the lifting foot 3 makes the rotation operation more convenient and stable, and further improves the lifting safety.

[0057] In practical use, this lifting device moves horizontally with the help of a crane, bringing the upper and lower surfaces of the opening of the lifting foot 3 into contact with the forging to maximize the contact area. At the same time, the two lifting arms 2 should also be positioned at the maximum diameter of the forging, accurately finding the center point of each position to ensure that the two lifting arms 2 are subjected to uniform force.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lifting device for large forgings in the shape of flying saucers, characterized in that, It includes a crossbeam and two booms symmetrically arranged at both ends of the crossbeam. The ends of the booms away from the crossbeam are provided with lifting feet. The lifting feet include a connecting section, an outwardly expanding limiting section and a bearing section connected in sequence. The connecting section is connected to the boom and is located on the same straight line; The outwardly expanding limiting section includes a top limiting surface and a side limiting surface. The top limiting surface is used to restrict the large saucer-shaped forging from moving away from the bearing section. The side limiting surface is used to restrict the large saucer-shaped forging from moving radially. The side limiting surface is separated from the connecting section by a first distance in the horizontal direction. The bearing section is arranged perpendicular to the connecting section, and the end of the bearing section away from the limiting section is flush with the connecting section.

2. The lifting device for large saucer-shaped forgings according to claim 1, characterized in that, The first distance is 200-250mm.

3. The lifting device for large saucer-shaped forgings according to claim 1, characterized in that, The outwardly expanding limiting segment is L-shaped, and the two surfaces of the outwardly expanding limiting segment that are connected and perpendicular are the top limiting surface and the side limiting surface, respectively.

4. The lifting device for large saucer-shaped forgings according to claim 1, characterized in that, The bearing section is provided with an anti-slip plate for bearing the circumferential edge of the large saucer-shaped forging. The anti-slip plate includes multiple parallel protruding ridges, and the protruding ridges are parallel to the side limiting surface.

5. The lifting device for large saucer-shaped forgings according to claim 1, characterized in that, The suspension foot includes two overlapping molded plates, each molded plate including a connecting section, an outwardly expanding limiting section, and a load-bearing section that are sequentially connected and integrally formed; The two molded plates are connected by multiple reinforcing ribs, which are arranged horizontally from high to low.

6. The lifting device for large saucer-shaped forgings according to claim 5, characterized in that, The plurality of reinforcing ribs include a first rib plate and a second rib plate, the first rib plate covering the top of the two outwardly expanding limiting sections of the two molded plates, and the second rib plate covering the end faces of the two bearing sections of the two molded plates opposite to the outwardly expanding limiting sections.

7. The lifting device for large saucer-shaped forgings according to claim 1, characterized in that, The connecting section is connected to the boom by a load-bearing pin and then welded.

8. The lifting device for large saucer-shaped forgings according to claim 1, characterized in that, The boom is rotatably connected to the crossbeam, and the connecting section of the foot is connected to a chain, which is used to connect to the trolley hook, so that the boom and the foot rotate synchronously under the control of the trolley.

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