Long bar quenching lifting appliance

Abstract

The utility model relates to a long bar quenching lifting appliance and belongs to the field of heat treatment equipment. According to the technical scheme, the long bar quenching lifting appliance comprises a lifting beam, a main lifting lug assembly is arranged at the midpoint position of the lifting beam and located on the top face of the lifting beam, at least one pair of auxiliary lifting lugs is arranged on the top face of the lifting beam, and the auxiliary lifting lugs are symmetrically arranged with the main lifting lug assembly as the midpoint; a first cable-stayed beam is arranged between the main lifting lug assembly and the lifting beam, and a second cable-stayed beam is arranged between the auxiliary lifting lug and the lifting beam. According to the quenching lifting appliance designed in the scheme, on the basis of the main lifting lug assembly in the middle, the auxiliary lifting lugs are arranged on the two sides of the quenching lifting appliance in pairs, in the lifting process, the auxiliary lifting lugs are matched with the main lifting lug assembly to form a multi-point suspension structure, swing and rotation of the lifting beam are reduced, and the stability of the lifting appliance in the using process is improved; and on the other hand, the cable-stayed beams are arranged among the main lifting lug assembly, the auxiliary lifting lugs and the lifting beam, so that the bending strength of the lifting beam is improved, and the applicability to the long-rod-shaped forgings is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment equipment, and in particular to a long bar quenching hanger. Background Technology

[0002] Quenching and tempering is one of the core processes in the heat treatment of metallic materials. It improves the overall mechanical properties of materials through a combination of quenching (rapid cooling) and high-temperature tempering (500-650℃). Its core objective is to balance the strength, toughness, and fatigue resistance of the material, and it is suitable for materials such as medium carbon steel and alloy steel. Quenched and tempered parts possess excellent comprehensive mechanical properties, including high tensile strength, yield strength, and impact toughness, meeting the requirements of various complex working conditions. For example, in the manufacture of large components in heavy machinery, quenching and tempering allows them to maintain good mechanical properties even under large-size, high-stress conditions.

[0003] For the quenching process of long bar-shaped forgings such as crankshafts and connecting rods, to ensure that the forgings can be uniformly immersed in the quenching medium (water or quenching oil), a lifting device is usually used to hold the forging in a horizontal position before lowering it into the quenching medium. A common lifting device is a horizontal lifting beam structure, with lifting points at both ends below the beam and another lifting point above it. In use, the forging is suspended from the lower lifting point by a chain, and then a crane or other lifting device is used to connect to the upper lifting point to place the forging into the quenching medium.

[0004] The existing lifting devices have the following shortcomings when dealing with forgings with large lengths: When the forging is long, the required lifting beam is also long. When the lifting device is suspended, it is easy to swing, tilt and rotate around the lifting point, causing one end of the forging to enter the quenching medium before the other end, resulting in uneven cooling rates along the length of the forging and uneven internal stress after quenching. In addition, as the length of the forging increases, the weight also increases, causing the lifting beam to be subjected to downward tension on both sides and upward tension in the middle when suspending the forging. Furthermore, the lifting device is prone to bending and deformation when it is close to the high-temperature forging for a long time. Summary of the Invention

[0005] This invention addresses the problem that current beam-type quenching hangers are unstable and prone to bending when used for long bar forgings, and provides a new quenching hanger for long bars.

[0006] To address the aforementioned problems, the present invention provides a long bar quenching lifting fixture, comprising a lifting beam. A main lifting lug assembly is located at the midpoint of the lifting beam, situated on the top surface of the beam. At least one pair of auxiliary lifting lugs are provided on the top surface of the lifting beam, symmetrically arranged with the main lifting lug assembly as the midpoint. A first diagonal brace is positioned between the main lifting lug assembly and the lifting beam, and a second diagonal brace is positioned between the auxiliary lifting lugs and the lifting beam. This quenching lifting fixture, based on the central main lifting lug assembly, incorporates pairs of auxiliary lifting lugs on both sides. During lifting, the auxiliary lifting lugs, in conjunction with the main lifting lug assembly, form a multi-point suspension structure, reducing the swaying and rotation of the lifting beam and increasing the stability of the lifting fixture during use. Furthermore, the diagonal brace positioned between the main lifting lug assembly, auxiliary lifting lugs, and the lifting beam improves the bending strength of the lifting beam, increasing its applicability to long bar forgings.

[0007] As a preferred embodiment of a lifting device for quenching long bars, the lifting beam has a square groove in the center of its top surface. The main lifting lug assembly includes a main lifting lug body and a connecting block. The connecting block is fixedly connected to the bottom of the main lifting lug body, and its lower part is embedded in the square groove and fixedly connected to the lifting beam. The main lifting lug assembly is embedded, which allows for precise positioning of the main lifting lug assembly, ensuring its coaxiality and perpendicularity with the lifting beam, and enabling the lifting force to be evenly transmitted to the lifting beam. Simultaneously, the embedded connection increases the contact area and connection strength, reducing the risk of loosening or falling off the main lifting lug assembly during frequent lifting operations, further improving the overall stability and reliability of the lifting device.

[0008] As a preferred embodiment of a lifting device for quenching long bars, one end of the first inclined tie beam is fixedly connected to the side of the connecting block, and the other end of the first inclined tie beam is fixedly connected to the lifting beam. The first inclined tie beam, together with the main lifting lug assembly and the lifting beam, forms a stable triangular structure, which efficiently disperses the concentrated tensile force at the main lifting lug. When lifting heavy long bars, this effectively suppresses bending deformation of the lifting beam and significantly extends the service life of the lifting device. At the same time, this structure enhances the overall rigidity of the lifting device, greatly improving its anti-sway capability in complex lifting environments and ensuring a stable and safe lifting process.

[0009] As a preferred implementation of a lifting device for quenching long bars, the connection point between the first inclined tie beam and the lifting beam is abutted against the auxiliary lifting lug. This close fit between the first inclined tie beam and the auxiliary lifting lug forms a highly efficient force transmission system, optimizes the force transmission path, makes the entire lifting device structure more evenly stressed, effectively reduces structural fatigue damage, improves the adaptability and reliability of the lifting device under harsh working conditions, and ensures safe and efficient lifting operations.

[0010] As a preferred embodiment of a lifting device for quenching long bars, the auxiliary lifting lug includes a first U-shaped seat. The base plate of the first U-shaped seat is fixedly connected to the lifting beam. A sleeve is provided between the two side plates of the first U-shaped seat, and both ends of the sleeve are fixedly connected to the two side plates of the first U-shaped seat, respectively. The sleeve is through-hole. The side plates of the first U-shaped seat have holes corresponding to the inner hole positions of the sleeve. One end of the second inclined beam is fixedly connected to the outer wall of the sleeve, and the other end of the second inclined beam is fixedly connected to the lifting beam. The sleeve provides a low-friction passage for the lifting rope, effectively extending the rope's service life and reducing the frequency of replacement. The connection between the second inclined beam and the sleeve enhances the overall structural strength of the auxiliary lifting lug, minimizing deformation under heavy loads. The multi-point suspended auxiliary lifting lug, in conjunction with the main lifting lug assembly, can evenly distribute the weight of the long bar to various parts of the lifting beam, significantly improving lifting stability and safety, and is especially suitable for lifting heavy, long bars.

[0011] As a preferred embodiment of a lifting device for quenching long bars, the lifting beam is an I-beam structure. Multiple hook assemblies are provided at the bottom of the lifting beam. Each hook assembly includes a second U-shaped seat. Rollers are mounted on the opposite surfaces of the two side plates of the second U-shaped seat. The rollers on both sides are located in grooves on both sides of the lifting beam and roll in contact with the lower flange of the lifting beam. The bottom surface of the second U-shaped seat has the hook body. Multiple flexibly movable hook assemblies can precisely adjust the bearing point position according to the length and center of gravity distribution of the long bar, enhancing the applicability of the lifting device to long bars of different specifications and meeting diverse lifting needs.

[0012] As a preferred solution for a long bar quenching lifting device, triangular or wavy protrusions are evenly distributed on the upper surface of the lower flange along the length of the lifting beam. After lifting the forging, the rollers engage with the grooves formed between adjacent protrusions to position the hook assembly and improve the stability of the suspension; when the forging is not suspended, it is convenient to adjust the position of the hook assembly.

[0013] As a preferred embodiment of a long bar quenching lifting tool, the hook body includes two connecting plates and a hook plate. The two connecting plates are fixed parallel to each other on the bottom surface of the second U-shaped seat, and the hook plate is hinged between the two connecting plates.

[0014] As can be seen from the above technical solutions, the advantages of this utility model are as follows: the multi-point suspension structure formed by the main lifting lug assembly and the auxiliary lifting lug significantly reduces the swaying and rotation of the lifting beam, and the design of the inclined tie beam effectively improves the bending strength of the lifting beam; the embedded installation of the main lifting lug assembly ensures the uniform transmission of lifting force and enhances connection stability; the triangular structure constructed by the first inclined tie beam disperses the tension of the main lifting lug, suppresses the deformation of the lifting beam, and improves rigidity; the close cooperation between the first inclined tie beam and the auxiliary lifting lug optimizes force transmission and reduces structural fatigue; the sleeve design in the auxiliary lifting lug extends the life of the lifting rope, and the second inclined tie beam enhances the structural strength, achieving uniform weight distribution of the long bar; the I-beam structure lifting beam, combined with the movable hook assembly, can flexibly adjust the bearing point to adapt to long bars of different specifications; the protrusion of the lower flange of the lifting beam assists in the positioning of the hook assembly and improves suspension stability; the hinged design of the hook body improves the versatility of the lifting device for long bars of different shapes, ensuring safe and efficient lifting operations in all aspects. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 This is a schematic diagram of the auxiliary lifting lug in a specific embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the hook assembly in a specific embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the cross-section of the hanging beam in a specific embodiment of this utility model.

[0021] Explanation of main figure symbols

[0022] 1. Lifting beam, 11. Upper flange, 12. Lower flange, 13. Waist plate, 2. Main lifting lug assembly, 21. Main lifting lug body, 22. Connecting block, 3. Auxiliary lifting lug, 31. First U-shaped seat, 32. Sleeve, 4. First diagonal tie beam, 5. Second diagonal tie beam, 6. Square groove, 7. Hook assembly, 71. Second U-shaped seat, 72. Roller, 73. Connecting plate, 74. Hook plate. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] like Figure 1 As shown, a long bar quenching lifting device includes a lifting beam 1. Multiple hook assemblies 7 are provided at the bottom of the lifting beam 1. A main lifting lug assembly 2 is located at the midpoint of the lifting beam 1 along its length. The main lifting lug assembly 2 is located on the top surface of the lifting beam 1, preferably at the geometric center of the top surface. The main lifting lug assembly 2 includes a main lifting lug body 21 and a connecting block 22. The connecting block 22 is fixedly connected to the bottom of the main lifting lug body 21. A square groove 6 is provided in the middle of the top surface of the lifting beam 1. The lower part of the connecting block 22 is embedded in the square groove 6 and fixedly connected to the lifting beam 1. A pair of auxiliary lifting lugs 3 are provided on the top surface of the lifting beam 1. The two auxiliary lifting lugs 3 are symmetrically arranged with the main lifting lug assembly 2 as the midpoint (in other embodiments, more pairs of auxiliary lifting lugs 3 can be provided according to the length of the lifting beam 1). Based on this, a first diagonal beam 4 is provided between the main lifting lug assembly 2 and the lifting beam 1, and a second diagonal beam 5 is provided between the auxiliary lifting lugs 3 and the lifting beam 1.

[0025] One end of the first inclined tie beam 4 is fixedly connected to the side of the connecting block 22, and the other end of the first inclined tie beam 4 is fixedly connected to the lifting beam 1. The connection point between the first inclined tie beam 4 and the lifting beam 1 is abutted against the auxiliary lifting lug 3.

[0026] like Figure 4 As shown, the auxiliary lifting lug 3 includes a first U-shaped seat 31, the bottom plate of the first U-shaped seat 31 is fixedly connected to the lifting beam 1, a sleeve 32 is provided between the two side plates of the first U-shaped seat 31, the two ends of the sleeve 32 are respectively fixedly connected to the two side plates of the first U-shaped seat 31, the sleeve 32 is through, the side plate of the first U-shaped seat 31 is provided with holes corresponding to the inner hole position of the sleeve 32, one end of the second inclined beam 5 is fixedly connected to the outer wall of the sleeve 32, and the other end of the second inclined beam 5 is fixedly connected to the lifting beam 1.

[0027] During installation, the lower part of the connecting block 22 of the main lifting lug assembly 2 is embedded into the square groove 6 in the middle of the top surface of the lifting beam 1 and fixedly connected. Then, one end of the first diagonal tie beam 4 is welded and fixed to the side of the connecting block 22, and the other end is welded and fixed to the lifting beam 1, with the connection point close to the auxiliary lifting lug 3. At the same time, the bottom plate of the first U-shaped seat 31 of the auxiliary lifting lug 3 is welded and fixed to the lifting beam 1. The sleeve 32 is installed between the side plates of the first U-shaped seat 31 and welded and fixed. Then, one end of the second diagonal tie beam 5 is welded and fixed to the outer wall of the sleeve 32, and the other end is welded and fixed to the lifting beam 1.

[0028] In this embodiment, the hook assembly 7 is position-adjustable, specifically, as shown below. Figure 3 , 5 As shown, the lifting beam adopts an I-beam structure. The I-beam (i.e., the lifting beam) includes an upper flange 11 and a lower flange 12 that are parallel to each other, and a waist plate 13 that connects the upper flange 11 and the lower flange 12. On both sides of the lifting beam, the upper flange 11, the lower flange 12, and the waist plate 13 together form a groove structure. The hook assembly 7 includes a second U-shaped seat 71. Rollers 72 are respectively installed on the opposite surfaces of the two side plates of the second U-shaped seat 71. The rollers 72 on both sides are respectively located in the grooves on both sides of the lifting beam 1 and roll in contact with the lower flange 12 of the lifting beam 1. The bottom surface of the second U-shaped seat 71 is provided with a hook body. The hook body includes two connecting plates 73 and a hook plate 74. The two connecting plates 73 are fixed parallel to each other on the bottom surface of the second U-shaped seat 71. The hook plate 74 is hinged between the two connecting plates 73.

[0029] Furthermore, in order to fix the position of the hook assembly during hoisting and prevent it from moving along the lifting beam 1, in this embodiment, as follows: Figure 2 As shown, along the length of the lifting beam 1, the upper surface of the lower flange 12 of the lifting beam 1 is uniformly provided with triangular or wavy protrusions. Before lifting, the position of the hook assembly 7 can be adjusted according to the length of the forging. Before the forging is hung, the lifting device is lowered to the height of a person. The worker pushes the hook assembly 7 to a suitable position. Under the action of gravity, the roller 72 is located in the groove between adjacent triangular protrusions or in the trough of the wave. During lifting, the forging is hung on the hook assembly 7 by the iron chain. Under the action of the weight of the forging, the roller is more tightly stuck in the groove and can no longer move easily along the lifting beam. Then, the crane hook is hooked into the main lifting lug body 21. The main lifting lug assembly 2 and the auxiliary lifting lugs 3 on both sides cooperate to form a multi-point suspension. The first inclined beam 4 and the second inclined beam 5 disperse the tension to ensure the stability of the lifting beam 1 and realize the safe lifting of long bars.

[0030] As can be seen from the above technical solutions, the beneficial effects of this utility model are as follows: the multi-point suspension structure formed by the main lifting lug assembly and the auxiliary lifting lug significantly reduces the swaying and rotation of the lifting beam, and the design of the inclined tie beam effectively improves the bending strength of the lifting beam; the embedded installation of the main lifting lug assembly ensures the uniform transmission of lifting force and enhances connection stability; the triangular structure constructed by the first inclined tie beam disperses the tension of the main lifting lug, suppresses the deformation of the lifting beam, and improves rigidity; the close cooperation between the first inclined tie beam and the auxiliary lifting lug optimizes force transmission and reduces structural fatigue; the sleeve design in the auxiliary lifting lug extends the life of the lifting rope, and the second inclined tie beam enhances the structural strength, achieving uniform weight distribution of the long bar; the I-beam structure lifting beam, combined with the movable hook assembly, can flexibly adjust the bearing point to adapt to long bars of different specifications; the protrusion of the lower flange of the lifting beam assists in the positioning of the hook assembly and improves suspension stability; the hinged design of the hook body improves the versatility of the lifting device for long bars of different shapes, ensuring safe and efficient lifting operations in all aspects.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting device for quenching long bars, comprising a lifting beam (1), characterized in that, The main lifting lug assembly (2) is provided at the midpoint of the lifting beam (1). The lifting lug assembly is located on the top surface of the lifting beam (1). The top surface of the lifting beam (1) is also provided with at least one pair of auxiliary lifting lugs (3). The auxiliary lifting lugs (3) are symmetrically arranged with the main lifting lug assembly (2) as the midpoint. A first diagonal brace (4) is provided between the main lifting lug assembly (2) and the lifting beam (1), and a second diagonal brace (5) is provided between the auxiliary lifting lug (3) and the lifting beam (1).

2. The long bar quenching lifting fixture according to claim 1, characterized in that, The top surface of the lifting beam (1) is provided with a square groove (6). The main lifting lug assembly (2) includes a main lifting lug body (21) and a connecting block (22). The connecting block (22) is fixedly connected to the bottom of the main lifting lug body (21). The lower part of the connecting block (22) is embedded in the square groove (6) and fixedly connected to the lifting beam (1).

3. The long bar quenching lifting fixture according to claim 2, characterized in that, One end of the first inclined beam (4) is fixedly connected to the side of the connecting block (22), and the other end of the first inclined beam (4) is fixedly connected to the hanging beam (1).

4. The long bar quenching lifting fixture according to claim 3, characterized in that, The connection point between the first inclined tie beam (4) and the lifting beam (1) is abutted against the auxiliary lifting lug (3).

5. The long bar quenching lifting fixture according to claim 1, characterized in that, The auxiliary lifting lug (3) includes a first U-shaped seat (31), the bottom plate of the first U-shaped seat (31) is fixedly connected to the lifting beam (1), a sleeve (32) is provided between the two side plates of the first U-shaped seat (31), the two ends of the sleeve (32) are fixedly connected to the two side plates of the first U-shaped seat (31) respectively, the sleeve (32) is through, the side plate of the first U-shaped seat (31) is provided with a hole corresponding to the inner hole position of the sleeve (32), one end of the second inclined beam (5) is fixedly connected to the outer wall of the sleeve (32), and the other end of the second inclined beam (5) is fixedly connected to the lifting beam (1).

6. The long bar quenching lifting tool according to claim 1, characterized in that, The lifting beam (1) is an I-beam structure. The bottom of the lifting beam (1) is provided with multiple hook assemblies (7). The hook assembly (7) includes a second U-shaped seat (71). Rollers (72) are respectively installed on the opposite surfaces of the two side plates of the second U-shaped seat (71). The rollers (72) on both sides are respectively located in the grooves on both sides of the lifting beam (1) and roll in contact with the lower wing plate (12) of the lifting beam (1). The bottom surface of the second U-shaped seat (71) is provided with a hook body.

7. The long bar quenching lifting fixture according to claim 6, characterized in that, Along the length of the lifting beam (1), the upper surface of the lower wing plate (12) is uniformly provided with triangular or wavy protrusions.

8. The long bar quenching lifting fixture according to claim 6, characterized in that, The hook body includes two connecting plates (73) and a hook plate (74). The two connecting plates (73) are fixed parallel to each other on the bottom surface of the second U-shaped seat (71), and the hook plate (74) is hinged between the two connecting plates (73).

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