A roll changing method and device for a guide roller of a straightening machine

Abstract

The present invention provides a method and a device for replacing guide rollers of a straightening machine. The roller replacement device includes a hydraulic cylinder; a roller replacement cart, which is arranged on one side of the hydraulic cylinder and fixedly connected to the output end of the hydraulic cylinder; two fixed roller groups, which are arranged on the top side of the roller replacement cart and on both sides of the roller replacement cart, and are fixedly connected to the roller replacement cart. Any one of the fixed roller groups is arranged perpendicular to the telescopic direction of the hydraulic cylinder and is used for transporting guide rollers; two adjusting roller groups are respectively arranged on both sides of any one of the fixed roller groups and are hinged to the end of the fixed roller group, and the included angle between the two adjusting roller groups and the fixed roller group ranges from 90° to 180°. The roller replacement device of the present application is simple and reliable. Since it was put into use on site, the replacement time of guide rollers has been greatly reduced, the economic benefits have been improved, and at the same time, the labor intensity of workers has been reduced, achieving very good actual results.

Description

Technical Field

[0001] The present invention relates to the field of roll changing devices, and particularly to a method and device for changing the guide rolls of a straightening machine. Background Art

[0002] The 3000 straightening machine in Sanming, Fujian is located behind the steel plate rapid cooling device and in front of the cooling bed; its main function is to straighten the hot-rolled finished steel plate rolled out by the main rolling mill in a hot state. The horizontal guide roll is composed of a guide roll and a guide roll seat, etc., which is used to fill the gap between the straightening roll and the roller table, smoothly guide the steel plate, prevent the steel plate from drilling into the trench, and avoid sliding friction between the steel plate and the guide plate.

[0003] In the prior art, the horizontal guide roll is fixed in the chute of the straightening machine frame through the boss of the bearing seats at both ends. Before disassembly and assembly, it is necessary to lift a certain height to disengage from the chute. However, there is an interference from the movable beam and the straightening machine platform above the horizontal guide roll. Therefore, the traveling crane can only lift it but cannot move horizontally, making the disassembly and assembly of the horizontal guide roll extremely difficult. Summary of the Invention

[0004] In view of the above problems, the present invention aims to solve the problems described above. An object of the present invention is to provide a method and device for changing the guide rolls of a straightening machine to solve the influence of the movable beam and the straightening machine platform on the disassembly and assembly of the guide rolls.

[0005] A method for changing the guide rolls of a straightening machine includes:

[0006] S1 Place the roll changing device on the roll changing track;

[0007] S2 Push the roll changing cart 11 into the inside of the straightening machine through the hydraulic cylinder 10;

[0008] S3 Loosen the fastening bolts of the guide roll to be replaced and lift the guide roll to be replaced by 80 mm;

[0009] S4 Expand the adjusting roll group 21 until the adjusting roll group 21 is parallel to the fixed roll group 20;

[0010] S5 Lower the guide roll to be replaced onto the adjusting roll group 21 and move the guide roll to be replaced onto the fixed roll group 20;

[0011] S6 Retract the adjusting roll group 21 until the adjusting roll group 21 is perpendicular to the fixed roll group 20;

[0012] S7 Retract the hydraulic cylinder 10 and the guide roll to be replaced through the hydraulic cylinder 10.

[0013] Preferably,

[0014] A method for changing the guide rolls of a straightening machine further includes:

[0015] S8 Place the new guide roller on the fixed roller set 20 and fix it;

[0016] S9 Push the roll changing cart 11 into the inside of the straightening machine through the hydraulic cylinder 10;

[0017] S10 Expand the adjusting roller set 21 until the adjusting roller set 21 is parallel to the fixed roller set 20;

[0018] S11 Move the new guide roller to the adjusting roller set 21;

[0019] S12 Lift the new guide roller;

[0020] S13 Retract the adjusting roller set 21 and withdraw the roll changing cart 11;

[0021] S14 Install the new guide roller on the straightening machine.

[0022] A roll changing device for the guide roller of a straightening machine, comprising:

[0023] A hydraulic cylinder 10; a roll changing cart 11, arranged on one side of the hydraulic cylinder 10 and fixedly connected to the output end of the hydraulic cylinder 10; two fixed roller sets 20, arranged on the top side of the roll changing cart 11 and on both sides of the roll changing cart 11, fixedly connected to the roll changing cart 11, and any one of the fixed roller sets 20 is arranged perpendicular to the telescopic direction of the hydraulic cylinder 10 for transporting the guide roller; two adjusting roller sets 21, respectively arranged on both sides of any one of the fixed roller sets 20, hinged to the end of the fixed roller set 20, and the included angle between the adjusting roller set 21 and the fixed roller set 20 ranges from 90° to 180°.

[0024] This application mainly solves the problem that the hoisting, disassembly and replacement of the existing horizontal guide roller are inconvenient.

[0025] Preferably, specifically, the fixed roller set 20 or the adjusting roller set 21 both includes: two partition plates 30; a roller 31, fixed between the two partition plates 30 through a rotor 32.

[0026] Preferably, the length of the adjusting roller set 21 does not exceed 1 / 2 of the length of the fixed roller set 20.

[0027] Preferably, the length of the adjusting roller set 21 is at least greater than 1 / 4 of the length of the fixed roller set 20.

[0028] Preferably, the two adjusting roller sets 21 on the same side of the fixed roller set 20 are coaxially arranged, and the sum of the lengths of the two adjusting roller sets 21 is not less than the length of the roll changing cart 11.

[0029] Preferably, the two adjusting roller sets 21 are symmetrically arranged on both sides of the fixed roller set 20.

[0030] The roll changing method and roll changing device for the guide roller of the straightening machine of the present invention have the following technical effects:

[0031] The roll changing method and device for the guard rolls of the straightening machine in this application are simple and reliable. Since they were put into use on-site, the roll changing time of the guard rolls has been significantly reduced, the economic benefits have been improved, and at the same time, the labor intensity of workers has been alleviated, achieving very good practical results.

[0032] Read the following description of the exemplary embodiments with reference to the accompanying drawings, and other characteristics, features, and advantages of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. In these drawings, like reference numerals are used to represent like elements. The drawings in the following description are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 Structural diagram of the roll changing device for the guard rolls of the straightening machine of the present invention;

[0035] Figure 2 State diagram of the adjusting roll group when retracted in the present invention;

[0036] Figure 3 State diagram of the adjusting roll group when expanded in the present invention;

[0037] Figure 4 Structural diagram of the adjusting roll group of the present invention;

[0038] Figure 5 State diagram of the roll changing device during the first stage of use in the present invention;

[0039] Figure 6 State diagram of the roll changing device during the second stage of use in the present invention;

[0040] Figure 7 State diagram of the roll changing device during the third stage of use in the present invention.

[0041] In the figures: 10, hydraulic cylinder; 11, roll changing cart; 20, fixed roll group; 21, adjusting roll group; 30, partition; 31, roller; 32, rotor; 100, straightening machine column; 101, movable beam of the straightening machine; 102, guard roll. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined arbitrarily with each other.

[0043] The following will, with reference to the accompanying drawings and embodiments, elaborate in detail on the roll-changing method and roll-changing device for the guard rolls of the straightening machine.

[0044] Embodiment 1

[0045] A roll-changing method for the guard rolls of a straightening machine includes:

[0046] S1 Place the roll-changing device on the replacement roll track;

[0047] S2 Push the roll-changing cart 11 into the inside of the straightening machine through the hydraulic cylinder 10;

[0048] S3 Loosen the fastening bolts of the guard roll and lift the guard roll to be replaced by 80 mm;

[0049] S4 Expand the adjusting roll set 21 until the adjusting roll set 21 is parallel to the fixed roll set 20;

[0050] S5 Lower the guard roll to be replaced onto the adjusting roll set 21 and move the guard roll to be replaced onto the fixed roll set 20;

[0051] S6 Retract the adjusting roll set 21 until the adjusting roll set 21 is perpendicular to the fixed roll set 20;

[0052] S7 Retract the hydraulic cylinder 10 and the guard roll to be replaced through the hydraulic cylinder 10.

[0053] Embodiment 2

[0054] A roll-changing method for the guard rolls of a straightening machine further includes:

[0055] S8 Place the new guard roll on the fixed roll set 20;

[0056] S9 Push the roll-changing cart 11 into the inside of the straightening machine through the hydraulic cylinder 10;

[0057] S10 Expand the adjusting roll set 21 until the adjusting roll set 21 is parallel to the fixed roll set 20;

[0058] S11 Move the new guard roll to the adjusting roll set 21;

[0059] S12 Lift the new guard roll;

[0060] S13 Retract the adjusting roller set 21 and withdraw the roll changing cart 11;

[0061] S14 Install the new guide roller on the straightening machine.

[0062] Embodiment 3

[0063] A roll changing device for a guide roller of a straightening machine, comprising:

[0064] A hydraulic cylinder 10; a roll changing cart 11, arranged on one side of the hydraulic cylinder 10 and fixedly connected to the output end of the hydraulic cylinder 10; two fixed roller sets 20, arranged on the top side of the roll changing cart 11 and on both sides of the roll changing cart 11, fixedly connected to the roll changing cart 11, and any one of the fixed roller sets 20 is arranged perpendicular to the telescopic direction of the hydraulic cylinder 10 for transporting the guide roller; two adjusting roller sets 21, respectively arranged on both sides of any one of the fixed roller sets 20, hinged to the end of the fixed roller set 20, and the included angle between the adjusting roller set 21 and the fixed roller set 20 ranges from 90° to 180°.

[0065] The main problem solved by this application is the inconvenience of hoisting, disassembling and replacing the existing horizontal guide rollers. The specific process includes:

[0066] S1 Place the roll changing device on the roll changing track;

[0067] S2 Push the roll changing cart 11 into the inside of the straightening machine through the hydraulic cylinder 10;

[0068] S3 Loosen the fastening bolts of the guide roller and lift the guide roller to be replaced by 80 mm;

[0069] S4 Expand the adjusting roller set 21 until the adjusting roller set 21 is perpendicular to the fixed roller set 20;

[0070] S5 Lower the guide roller to be replaced onto the adjusting roller set 21, and push the guide roller into the center of the fixed roller set 20 by means of tools such as a crowbar;

[0071] S6 Retract the adjusting roller set 21;

[0072] S7 Retract the hydraulic cylinder 10 and the guide roller to be replaced through the hydraulic cylinder 10;

[0073] S8 Place the new guide roller on the fixed roller set 20;

[0074] S9 Push the roll changing cart 11 into the space between the two columns of the straightening machine through the hydraulic cylinder 10;

[0075] S10 Expand the adjusting roller set 21 until the adjusting roller set 21 is perpendicular to the fixed roller set 20;

[0076] S11 Move the new guide roller to the adjusting roller set 21;

[0077] S12 Lift the new guide roller;

[0078] S13 Retract the adjusting roll group 21 and withdraw the roll changing cart 11;

[0079] S14 Install the new guide roller on the straightening machine.

[0080] During actual use, in order to prevent the deployed adjusting roll group 21 from deviating from its position, a limiting strip is hingedly arranged on the adjusting roll group 21, and a limiting block is arranged on the roll changing cart 11. The limiting strip can be clamped on the limiting block.

[0081] Among them, the contact surfaces of the limiting strip and the limiting block are both arc-shaped. Such a setting can facilitate clamping the limiting strip on the limiting block.

[0082] Among them, the 4 adjusting roll groups 21 are fixed on both side surfaces of the fixed roll group 20 with pin shafts. The adjusting roll group 21 swings with the fixed pin shaft as the center line and can be parallel or perpendicular to the side surface of the fixed roll group 20.

[0083] Through the above operation method, interference of the movable beam and the straightening machine platform on the disassembly of the guide roller can be avoided, and the disassembly and assembly of the horizontal guide roller are facilitated.

[0084] Embodiment 4

[0085] Specifically, the fixed roll group 20 or the adjusting roll group 21 both include: two partition plates 30; rollers 31, which are fixed between the two partition plates 30 through rotors 32.

[0086] Among them, the rollers 31 are fixed on the fixed roll group 20 or the adjusting roll group 21 with pin shafts, so that the guide roller can roll and move horizontally on the roll changing device.

[0087] Embodiment 5

[0088] The length of the adjusting roll group 21 does not exceed 1 / 2 of the length of the fixed roll group 20.

[0089] Among them, such a setting can prevent the adjusting roll group 21 from interfering with the straightening machine column and, at the same time, prevent the adjusting roll group 21 from tilting up.

[0090] Embodiment 6

[0091] The length of the adjusting roll group 21 is at least greater than 1 / 4 of the length of the fixed roll group 20.

[0092] Among them, it can ensure a large enough contact surface for placing the guide roller.

[0093] Embodiment 7

[0094] The two adjusting roll groups 21 on the same side of the fixed roll group 20 are coaxially arranged, and the sum of the lengths of the two adjusting roll groups 21 is not less than the length of the roll changing cart 11.

[0095] Among them, such a setting can facilitate the movement of the guiding roller from the adjusting roller group 21 to the fixed roller group 20.

[0096] Embodiment 8

[0097] The two adjusting roller groups 21 are symmetrically arranged on both sides of the fixed roller group 20.

[0098] The working principle of the roll changing method and roll changing device for the guiding roller of the straightening machine in this application:

[0099] During operation, the roll changing device is placed on the roll changing track; the roll changing cart 11 is pushed into the inside of the straightening machine through the hydraulic cylinder 10; the guiding roller to be replaced is lifted; the adjusting roller group 21 is unfolded until the adjusting roller group 21 is perpendicular to the fixed roller group 20; the guiding roller to be replaced is lowered onto the adjusting roller group 21, and the guiding roller to be replaced is moved to the fixed roller group 20; the adjusting roller group 21 is retracted; the hydraulic cylinder 10 and the guiding roller to be replaced are retracted through the hydraulic cylinder 10; the new guiding roller is placed on the fixed roller group 20; the roll changing cart 11 is pushed between the two columns of the straightening machine through the hydraulic cylinder 10; the adjusting roller group 21 is unfolded until the adjusting roller group 21 is perpendicular to the fixed roller group 20; the new guiding roller is moved to the adjusting roller group 21; the new guiding roller is lifted; the adjusting roller group 21 is retracted, and the roll changing cart 11 is withdrawn; the new guiding roller is installed on the straightening machine.

[0100] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the article or device including the elements.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. The present invention has only been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and should all be covered within the scope of the claims of the present invention.

Claims

1. A roll changing device for a straightening machine guard roll, characterized in that, Comprising: A hydraulic cylinder (10); A roll changing cart (11), arranged on one side of the hydraulic cylinder (10) and fixedly connected to the output end of the hydraulic cylinder (10); Two fixed roll groups (20), arranged on the top side of the roll changing cart (11) and on both sides of the roll changing cart (11), fixedly connected to the roll changing cart (11), and the fixed roll groups (20) are arranged perpendicular to the telescopic direction of the hydraulic cylinder (10) for transporting guide rollers; Four adjusting roll groups (21), one adjusting roll group (21) is respectively arranged on both sides of the two fixed roll groups (20), the adjusting roll group (21) is hinged to the end of the fixed roll group (20), and the included angle between the adjusting roll group (21) and the fixed roll group (20) ranges from 90° to 180°.

2. The roll changing device of the leveling guide roller according to claim 1, characterized in that, Each of the fixed roll group (20) or the adjusting roll group (21) includes: Two partition plates (30); Rollers (31), fixed between the two partition plates (30) through a rotor (32).

3. The roll changing device for the guide roller of the straightening machine according to claim 1, characterized in that The length of the adjusting roll group (21) does not exceed 1 / 2 of the length of the fixed roll group (20).

4. The roll changing device for the guide roller of the straightening machine according to claim 1, characterized in that The length of the adjusting roll group (21) is greater than 1 / 4 of the length of the fixed roll group (20).

5. The roll changing device for the guide roller of the straightening machine according to claim 1, characterized in that The two adjusting roll groups (21) are symmetrically arranged on both sides of the fixed roll group (20).

6. A method for replacing the guide roller of a straightening machine, which uses the roller replacement device according to any one of claims 1-5, characterized in that, Comprising: S1 Place the roll changing device on the roll changing track; S2 Push the roll changing cart (11) into the inside of the straightening machine through the hydraulic cylinder (10); S3 Lift the guide roller to be replaced; S4 Expand the adjusting roll group (21) until the adjusting roll group (21) is parallel to the fixed roll group (20); S5 Lower the guide roller to be replaced onto the adjusting roll group (21) and move the guide roller to be replaced onto the fixed roll group (20); S6 Retract the adjusting roll group (21) until the adjusting roll group (21) is perpendicular to the fixed roll group (20); S7 Retract the guide roller to be replaced through the hydraulic cylinder (10); The roll changing method for the guide roller of the straightening machine further includes: S8 Place the new guide roller on the fixed roll group (20); S9 Push the roll changing cart (11) into the inside of the straightening machine through the hydraulic cylinder (10); S10 Expand the adjusting roll group (21) until the adjusting roll group (21) is parallel to the fixed roll group (20); S11 Move the new guide roller onto the adjusting roll group (21); S12 Lift the new guide roller; S13 Retract the adjusting roll group (21) and withdraw the roll changing cart (11); S14 Install the new guide roller on the straightening machine.

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