A lifting device used during roll change of a rolling mill

Abstract

The utility model belongs to rolling mill roll changing technical field especially uses elevating gear when rolling mill roll changes, including base, support plate and lifting plate, the base is fixed with fixed base on, both sides on the fixed base all movably install support plate, the support plate is equipped with the mounting block of sleeve, the mounting block is installed in the rolling mill roll of correspondence, the telescopic end of elevating hydraulic cylinder is fixed lifting plate, both sides of lifting plate all movably connect telescopic plate, the complicated roll changing process is decomposed for vertical lifting positioning in this application, the standardization flow of upper roll preferential clamping fixed, horizontal closing installation, lower roll same installation, automatic reset, the automatic vertical lifting of roll body is realized by elevating hydraulic cylinder, the automatic horizontal movement of support plate, mounting block is realized by driving motor cooperation transmission screw rod, nut block, significantly reduces manual intervention and headstock dependence, provides solid datum for subsequent horizontal alignment through hydraulic push rod drive positioning plate clamping roll body.

Description

Technical Field

[0001] This utility model belongs to the field of rolling mill roll changing technology, specifically relating to a lifting device used during rolling mill roll changing. Background Technology

[0002] Roll changing in a rolling mill is a process operation in metallurgical production to replace worn or adjusted rolling mill rolls. It mainly involves the installation and maintenance of the roll changing device. In steel enterprises with large universal rolling mills, the hydraulic trolley for rolling mill roll changing consists of a hydraulic cylinder, a rotating arm, and a lifting pin. When changing rolls, the hydraulic cylinder raises the lifting pin to complete the push-pull action of the roll.

[0003] Traditional rolling mill roll changing generally requires multiple people to work together. The whole process is complicated, time-consuming and labor-intensive, and requires high skills and experience from the operators. It is extremely labor-intensive, and the roll body is prone to shaking or shifting during installation, resulting in misalignment or jamming. Utility Model Content

[0004] To address the issues raised in the background section regarding traditional rolling mill roll changing, which typically requires multiple operators, involves cumbersome steps, is time-consuming and labor-intensive, demands high levels of skill and experience from operators, and results in significant physical exertion, and where the rolls are prone to wobbling or shifting during installation, leading to misalignment or jamming, this invention provides a lifting device for rolling mill roll changing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting device used for changing rolls in a rolling mill, comprising a base, a support plate and a lifting plate, wherein a fixed seat is fixed on the base, and a support plate is movably installed on both sides of the fixed seat, and an installation block is sleeved on the support plate, and a rolling mill roll is correspondingly installed in the installation block;

[0006] A lifting hydraulic cylinder is installed above the base. A lifting plate is fixed to the telescopic end of the lifting hydraulic cylinder. Telescopic plates are movably connected to both sides of the lifting plate. A hydraulic push rod is installed in the middle of the support plate. A positioning plate is fixed to the driving end of the hydraulic push rod.

[0007] As a preferred embodiment of the lifting device used in the rolling mill roll changing according to this utility model, the cylinder body of the lifting hydraulic cylinder is fixedly installed in the base, its piston rod is set vertically upward, and the lifting plate is used to support the rolling mill roll.

[0008] As a preferred embodiment of the lifting device used in the rolling mill roll changing according to this utility model, the fixed end of the telescopic plate is fixedly connected to the support plate, and the telescopic plate slides with the lifting plate through the movable end.

[0009] As a preferred lifting device for changing rolls in a rolling mill according to this utility model, a positioning stake is fixed on the inner side of the mounting block, and a connecting end is provided on the inner side of the positioning stake.

[0010] As a preferred embodiment of the lifting device used in the rolling mill roll changing according to the present invention, a nut block is fixed at the lower end of the support plate, a conveying screw is inserted inside the nut block, and a drive motor is fixed at one end of the conveying screw.

[0011] As a preferred embodiment of the lifting device used in the rolling mill roll changing according to this utility model, the conveying screw is horizontally arranged and threadedly engaged with the nut block, and the output shaft of the drive motor is connected to one end of the conveying screw for driving the conveying screw to rotate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This application decomposes the complex roll changing process into a clear standardized process of "vertical lifting and positioning → upper roll priority clamping and fixing → horizontal approach installation → lower roll similar installation → automatic reset". The lifting hydraulic cylinder realizes the automatic vertical lifting of the roll body, and the drive motor, together with the transmission screw and nut block, realizes the automatic horizontal movement of the support plate and the mounting block. This significantly reduces manual intervention and reliance on overhead cranes. The positioning plate is driven by the hydraulic push rod to clamp the roll body, providing a solid benchmark for subsequent horizontal alignment. This prevents the common problem of multiple people working together to change rolls in rolling mills, which is cumbersome and the roll body is prone to shaking or shifting during installation, leading to inaccurate alignment or jamming. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the external frame structure of this utility model.

[0017] In the diagram: 1. Base; 2. Fixed seat; 3. Support plate; 4. Mounting block; 5. Positioning pile; 6. Connecting end; 7. Roller; 8. Lifting hydraulic cylinder; 9. Lifting plate; 10. Telescopic plate; 11. Nut block; 12. Transmission screw; 13. Drive motor; 14. Positioning plate; 15. Hydraulic push rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Embodiment 1

[0019] like Figures 1-3 As shown;

[0020] A lifting device used for changing rolls in a rolling mill includes a base 1, a support plate 3 and a lifting plate 9. A fixed seat 2 is fixed on the base 1. Support plates 3 are movably installed on both sides of the fixed seat 2. An installation block 4 is sleeved on the support plate 3. A rolling mill roll 7 is installed in the corresponding installation block 4.

[0021] A lifting hydraulic cylinder 8 is installed on the upper part of the base 1. A lifting plate 9 is fixed to the telescopic end of the lifting hydraulic cylinder 8. Telescopic plates 10 are movably connected to both sides of the lifting plate 9. A hydraulic push rod 15 is installed in the middle of the support plate 3. A positioning plate 14 is fixed to the driving end of the hydraulic push rod 15.

[0022] In this implementation plan: This application breaks down the complex roller changing process into a clear, standardized procedure of "vertical lifting and positioning → priority clamping and fixing of the upper roller → horizontal alignment and installation → similar installation of the lower roller → automatic reset". The lifting hydraulic cylinder 8 achieves automatic vertical lifting of the roller body, while the drive motor 13, in conjunction with the transmission screw 12 and nut block 11, achieves automatic horizontal movement of the support plate 3 and mounting block 4. This significantly reduces manual intervention and reliance on overhead cranes. The hydraulic push rod 15 drives the positioning plate 14 to clamp the roller body, providing a solid reference for subsequent horizontal alignment.

[0023] In an optional embodiment, the lifting hydraulic cylinder 8 is fixedly installed in the base 1, with its piston rod vertically upward, and the lifting plate 9 is used to support the mill roll 7.

[0024] In this implementation plan: the piston rod moves strictly vertically upward to ensure that the lifting plate 9 lifts the mill roll 7 along an absolutely vertical trajectory, eliminating the risk of swaying during manual hoisting, and making the roll body connection part and the connection end 6 highly aligned to improve efficiency.

[0025] In an optional embodiment, the fixed end of the telescopic plate 10 is fixedly connected to the support plate 3, and the telescopic plate 10 slides with the lifting plate 9 through the movable end.

[0026] In this implementation scheme: one end of the telescopic plate 10 is rigidly fixed to the support plate 3, and the other end is slidably connected to the lifting plate 9, forming a "single fixed-single free" structure. During horizontal advancement, the displacement caused by the axial movement of the roller is compensated in real time by the telescopic plate 10, completely solving the jamming problem caused by the rigid connection.

[0027] In an optional embodiment, a positioning stake 5 is fixed to the inner side of the mounting block 4, and a connecting end 6 is provided on the inner side of the positioning stake 5.

[0028] In this implementation plan: the positioning piles 5 are directly fixed to the inner side of the mounting block 4, forming an integrated "installation-positioning" module. After the roller body is placed on the lifting plate 9, its connecting part naturally falls into the guide zone between the two positioning piles 5, eliminating the need for manual adjustment. The two positioning piles 5 are symmetrically distributed on both sides of the mounting block 4, forming a rigid gantry frame to resist asymmetrical forces during the roller installation process.

[0029] In an optional embodiment, a nut block 11 is fixed to the lower end of the support plate 3. A transmission screw 12 is inserted inside the nut block 11. A drive motor 13 is fixed to one end of the transmission screw 12. The transmission screw 12 is horizontally arranged and threadedly engaged with the nut block 11. The output shaft of the drive motor 13 is connected to one end of the transmission screw 12 for driving the transmission screw 12 to rotate.

[0030] In this implementation scheme: the drive motor 13 rotates to transmit the lead screw 12, which drives the nut block 11 to bring the support plate 3 and the mounting block 4 together horizontally. The lead screw is set horizontally and works with the threaded pair to achieve millimeter-level micro-feeding of the support plate 3.

[0031] Working principle: First, place the new mill roll 7 on the lifting plate 9. Start the lifting hydraulic cylinder 8 to push the lifting plate 9 vertically upward. The roll body moves vertically along the positioning pile 5 until its connecting part is aligned with the connecting end 6 of the positioning pile 5. Next, fix the upper roll first. The hydraulic push rod 15 drives the positioning plate 14 to clamp the upper end of the roll body. Then, start the drive motor 13. The drive motor 13 rotates the transmission screw 12, which drives the nut block 11 to make the support plate 3 and the mounting block 4 move horizontally together. The lifting plate 9 and the telescopic plate 10 extend and retract together to compensate for the displacement of the roll body, thus completing the installation of the upper roll. Then, install the lower roll in the same way. Finally, the lower roll connecting part is designed to be 2-3mm shorter to ensure that the lower roll can still be finely adjusted after the upper roll is fixed. After the roll change is completed, the hydraulic cylinder 6 retracts, the lifting plate 9 descends to the initial position, and the telescopic plate 10 retracts synchronously to avoid space, thus completing the automatic reset.

[0032] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lifting device used for changing rolls in a rolling mill, comprising a base (1), a support plate (3), and a lifting plate (9), characterized in that: A fixed seat (2) is fixed on the base (1). Support plates (3) are movably installed on both sides of the fixed seat (2). An installation block (4) is sleeved on the support plate (3). A rolling mill roll (7) is installed in the installation block (4). A lifting hydraulic cylinder (8) is installed above the base (1). A lifting plate (9) is fixed to the telescopic end of the lifting hydraulic cylinder (8). Telescopic plates (10) are movably connected to both sides of the lifting plate (9). A hydraulic push rod (15) is installed in the middle of the support plate (3). A positioning plate (14) is fixed to the driving end of the hydraulic push rod (15).

2. The lifting device used for changing rolls in a rolling mill according to claim 1, characterized in that: The lifting hydraulic cylinder (8) is fixedly installed in the base (1), and its piston rod is set vertically upward. The lifting plate (9) is used to support the rolling mill roll (7).

3. The lifting device used for changing rolls in a rolling mill according to claim 1, characterized in that: The fixed end of the telescopic plate (10) is fixedly connected to the support plate (3), and the telescopic plate (10) slides with the lifting plate (9) through the movable end.

4. The lifting device used for changing rolls in a rolling mill according to claim 1, characterized in that: The mounting block (4) has a positioning stake (5) fixed on its inner side, and the positioning stake (5) has a connecting end (6) on its inner side.

5. The lifting device used for changing rolls in a rolling mill according to claim 1, characterized in that: The lower end of the support plate (3) is fixed with a nut block (11), and a transmission screw (12) is inserted inside the nut block (11). One end of the transmission screw (12) is fixed with a drive motor (13).

6. The lifting device used for changing rolls in a rolling mill according to claim 5, characterized in that: The lead screw (12) is set horizontally and threadedly engaged with the nut block (11). The output shaft of the drive motor (13) is connected to one end of the lead screw (12) for driving the lead screw (12) to rotate.

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