Centering device for replacing piston rod of lower roll bending cylinder of rolling mill

Abstract

The utility model relates to the field of rolling mills, and discloses a rolling mill lower roll bending cylinder piston rod replacing and centering device which comprises a guide rail linearly extending to the position below a cylinder body, a movable bottom plate arranged on the guide rail, a support fixedly installed on the movable bottom plate and a centering supporting plate located on the top of the support. A piston rod which is vertically arranged is inserted into the vertical inserting hole, the moving route of the circle center of the vertical inserting hole coincides with the circle center of the piston rod mounting hole, a vertical positioning rod is arranged on the side portion of the centering supporting plate, a horizontal positioning rod is arranged on the outer side of the cylinder body, the vertical positioning rod corresponds to the horizontal positioning rod, and when the movable bottom plate moves to the position below the cylinder body, the piston rod is inserted into the vertical positioning rod. After the vertical positioning rod is in butt joint with the horizontal positioning rod, the circle center of the vertical inserting hole coincides with the circle center of the piston rod mounting hole, the piston rod is axially aligned with the piston rod mounting hole, and the positioning device has the advantages of being rapid in positioning and easy to operate.

Description

Technical Field

[0001] The utility model relates to the field of rolling mills, in particular to a device for replacing and centering a piston rod of a lower bending roll cylinder of a rolling mill. Background Art

[0002] The bending roll cylinder is an important part of the rolling mill. There are 56 bending roll cylinders in the finishing mill. The working principle is that the bending roll force acts on the bearing seat of the working roll, and through the contact fulcrum between the working roll and the support roll shoulder, according to the lever principle, a force is generated to bend the working roll upward. The bending of the working roll can significantly improve the shape of the rolled steel plate. When replacing the piston rod in the bending roll cylinder, the piston rod needs to be aligned with the inlet of the bending roll cylinder and smoothly sent into the cylinder body. However, due to the narrow space below the bending roll cylinder, the installation direction needs to be from bottom to top, and the piston rod and the bending roll cylinder are heavy, which causes inconvenience to the replacement work and low work efficiency.

[0003] In the prior art, for example, application number: 202211209776.5 discloses a method for improving the replacement speed of the piston components of the bending roll cylinder of a plate and strip rolling mill. The patent discloses that a replacement mechanism for installing the piston rod is arranged directly below the cylinder mounting hole, but due to the small installation space, the arrangement of the installation mechanism is also not convenient for assembly, so the replacement efficiency of the above device does not achieve the ideal effect. Summary of the invention

[0004] In order to further improve the efficiency of replacing the piston rod, the present invention provides a device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill. The specific scheme is as follows:

[0005] A device for replacing and centering a piston rod of a rolling mill lower bending roll cylinder, used to align the piston rod with a piston rod mounting hole at the bottom of a cylinder body, comprising:

[0006] A guide rail extending straight to the bottom of the cylinder;

[0007] A movable base plate disposed on the guide rail;

[0008] A bracket, which is fixedly mounted on the mobile base plate;

[0009] A centering support plate, which is located at the top of the bracket, is provided with a vertical plug hole, a vertically arranged piston rod is inserted into the vertical plug hole, and the moving path of the center of the vertical plug hole coincides with the center of the piston rod mounting hole;

[0010] A vertical positioning rod, which is located on the side of the centering support plate;

[0011] A horizontal positioning rod, which is located outside the cylinder body;

[0012] The vertical positioning rod corresponds to the horizontal positioning rod, and when the movable base plate moves to the bottom of the cylinder body and the vertical positioning rod is docked with the horizontal positioning rod, the center of the vertical plug hole coincides with the center of the piston rod mounting hole, and the piston rod is axially aligned with the piston rod mounting hole.

[0013] Furthermore, there are two vertical positioning rods, which are symmetrically arranged on both sides of the vertical plug hole and are both located on the horizontal axis of the vertical plug hole.

[0014] Furthermore, there are two horizontal positioning rods, which are symmetrically arranged on both sides of the cylinder body and are parallel to the horizontal axis of the piston rod mounting hole.

[0015] Furthermore, a scissor jack is provided directly below the vertical insertion hole to push the piston rod into the cylinder body.

[0016] Furthermore, the bracket includes two support columns, which are symmetrically arranged on both sides of the bottom of the centering support plate and are both located on the horizontal axis of the vertical plug hole. The two support columns are located on the outside of the two vertical positioning rods.

[0017] Further, the height L of the top of the piston rod inserted into the vertical socket 1， ≤Cylinder bottom height L 3 .

[0018] Furthermore, magnetic blocks are provided on adjacent surfaces of the horizontal positioning rod and the vertical positioning rod, and both the horizontal positioning rod and the vertical positioning rod are made of steel.

[0019] Furthermore, the vertical positioning rod is provided with a notch which fits with the horizontal positioning rod. When the vertical positioning rod is connected with the horizontal positioning rod, the horizontal positioning rod is inserted into the notch. The vertical positioning rod is located on the horizontal axis of the piston rod mounting hole.

[0020] Compared with the prior art, the advantages of the utility model are as follows:

[0021] 1. In the utility model, the movable bottom plate is moved to the bottom of the cylinder body, and after the vertical positioning rod is connected with the horizontal positioning rod, the center of the vertical insertion hole coincides with the center of the piston rod mounting hole, and the piston rod is axially aligned with the piston rod mounting hole, which has the advantages of fast positioning and simple operation.

[0022] 2. The utility model arranges a magnetic block on the plate surface facing the driving direction of the horizontal positioning rod, and the horizontal positioning rod and the vertical positioning rod are magnetically connected through the magnetic block. When the driving vehicle moves into position, the horizontal positioning rod and the vertical positioning rod are quickly positioned and fixed, avoiding the movement of the driving vehicle.

[0023] 3. The utility model can prevent the vertical positioning rod from being separated from the horizontal positioning rod due to the shaking of the vehicle body when the lifting device lifts the piston rod by arranging a notch that fits with the horizontal positioning rod on the vertical positioning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is a positional relationship diagram of the centering support plate and the piston rod mounting hole;

[0026] Figure 3 for Figure 1 Side view of

[0027] Reference numerals:

[0028] 1. Cylinder body; 2. Vertical positioning rod; 3. Centering support plate; 3-1 vertical socket; 4. Support column; 5. Scissor jack; 6. Moving base plate; 8. Horizontal positioning rod; 9. Notch; 10. Magnetic block; 11. Piston rod mounting hole. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments.

[0030] Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the utility model.

[0031] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances. Example

[0033] like Figure 1As shown, a device for replacing and centering the piston rod of a rolling mill lower bending roll cylinder is used to align the piston rod with the piston rod mounting hole at the bottom of the cylinder body, comprising:

[0034] A guide rail extending straight to the bottom of the cylinder;

[0035] A movable base plate disposed on the guide rail;

[0036] A bracket, which is fixedly mounted on the moving base plate;

[0037] like Figure 2 As shown, the centering support plate is located at the top of the bracket, and a vertical plug hole is provided in the centering support plate. A vertically arranged piston rod is inserted into the vertical plug hole, and the moving path of the center of the vertical plug hole coincides with the center of the piston rod mounting hole; the top height L of the piston rod inserted in the vertical plug hole 1， ≤ Cylinder bottom height L 3 .

[0038] A scissor jack for pushing the piston rod into the cylinder body is arranged just below the vertical insertion hole.

[0039] like Figure 2 As shown, the vertical positioning rod is located on the side of the centering support plate; there are two vertical positioning rods, which are symmetrically arranged on both sides of the vertical socket and are both located on the horizontal axis of the vertical socket.

[0040] A horizontal positioning rod is located outside the cylinder body; there are two horizontal positioning rods, which are symmetrically arranged on both sides of the cylinder body and are parallel to the horizontal axis of the piston rod mounting hole.

[0041] like Figure 1 , Figure 2 As shown, the bracket includes two support columns, which are symmetrically arranged on both sides of the bottom of the centering support plate and are both located on the horizontal axis of the vertical plug hole. The two support columns are located on the outside of the two vertical positioning rods.

[0042] The vertical positioning rod corresponds to the horizontal positioning rod, and when the movable base plate moves to the bottom of the cylinder body and the vertical positioning rod is docked with the horizontal positioning rod, the center of the vertical plug hole coincides with the center of the piston rod mounting hole, and the piston rod is axially aligned with the piston rod mounting hole.

[0043] The support column height is L 1 The height of the piston rod above the centering support plate is L 2 , the height of the vehicle from the bottom of the cylinder is L 3 , the L 1 +L 2 ≤L 3 .

[0044] In the present application, the movable base plate is moved to the bottom of the cylinder body, the horizontal positioning rod is connected to the vertical positioning rod, so that the piston rod is aligned with the piston rod mounting hole, and the jacking device sends the piston rod into the cylinder body, which has the advantages of high assembly efficiency and simple operation. Example

[0045] like Figure 3 As shown, magnetic blocks are provided on the adjacent surfaces of the horizontal positioning rod and the vertical positioning rod. Both the horizontal positioning rod and the vertical positioning rod are made of steel. The horizontal positioning rod and the vertical positioning rod can be magnetically connected through the magnetic blocks. When the crane moves into position, the horizontal positioning rod and the vertical positioning rod are quickly positioned and fixed, thereby avoiding movement of the crane.

[0046] The vertical positioning rod is provided with a notch that fits with the horizontal positioning rod. When the vertical positioning rod is connected to the horizontal positioning rod, the horizontal positioning rod is stuck in the notch. The vertical positioning rod is located on the horizontal axis of the piston rod mounting hole, which can prevent the vertical positioning rod from being separated from the horizontal positioning rod due to the shaking of the vehicle body when the lifting device lifts the piston rod.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the utility model.

Claims

1. A device for replacing and centering the piston rod of a rolling mill lower bending roll cylinder, used to align the piston rod with the piston rod mounting hole at the bottom of the cylinder body, characterized in that: include: A guide rail extending straight to the bottom of the cylinder; A movable base plate disposed on the guide rail; A bracket, which is fixedly mounted on the mobile base plate; A centering support plate, which is located at the top of the bracket, is provided with a vertical plug hole, a vertically arranged piston rod is inserted into the vertical plug hole, and the moving path of the center of the vertical plug hole coincides with the center of the piston rod mounting hole; A vertical positioning rod, which is located on the side of the centering support plate; A horizontal positioning rod, which is located outside the cylinder body; The vertical positioning rod corresponds to the horizontal positioning rod, and when the movable base plate moves to the bottom of the cylinder body and the vertical positioning rod is docked with the horizontal positioning rod, the center of the vertical plug hole coincides with the center of the piston rod mounting hole, and the piston rod is axially aligned with the piston rod mounting hole.

2. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 1 is characterized in that: There are two vertical positioning rods, which are symmetrically arranged on both sides of the vertical plug hole and are both located on the horizontal axis of the vertical plug hole.

3. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 2 is characterized in that: There are two horizontal positioning rods, which are symmetrically arranged on both sides of the cylinder body and are parallel to the horizontal axis of the piston rod mounting hole.

4. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 1, characterized in that: A scissor jack for pushing the piston rod into the cylinder body is arranged just below the vertical insertion hole.

5. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 2, characterized in that: The bracket includes two support columns, which are symmetrically arranged on both sides of the bottom of the centering support plate and are both located on the horizontal axis of the vertical plug hole. The two support columns are located on the outside of the two vertical positioning rods.

6. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 5, characterized in that: Height L of the top of the piston rod inserted into the vertical socket 1， ≤ Cylinder bottom height L3.

7. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 6, characterized in that: A magnetic block is arranged on the adjacent surface of the horizontal positioning rod and the vertical positioning rod, and both the horizontal positioning rod and the vertical positioning rod are made of steel.

8. The device for replacing and centering the piston rod of the lower bending roll cylinder of a rolling mill according to claim 7, characterized in that: The vertical positioning rod is provided with a notch which fits with the horizontal positioning rod. When the vertical positioning rod is connected with the horizontal positioning rod, the horizontal positioning rod is inserted into the notch. The vertical positioning rod is located on the horizontal axis of the piston rod mounting hole.

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