Device for replacing structural elements of rolling mill

Abstract

The utility model discloses a structural element replacing device of a rolling mill, and belongs to the technical field of rolling mill equipment maintenance, the structural element replacing device comprises a main body frame used for being placed below a mounting position of a structural element, and the main body frame can be clamped into a to-be-replaced part; the supporting platform is used for providing support at the bottom of the structural element, and the supporting platform is located outside the main body frame; the driving assembly is installed in the main body frame, the output end of the driving assembly is connected with the supporting platform, and the driving assembly drives the supporting platform to ascend and descend in the vertical direction relative to the main body frame; the device can be matched with a mounting position of a structural element, replacement of the rolling mill structural element is directly and effectively assisted below the structural element, the replacement efficiency is remarkably improved, and the device can be used for replacing a hydraulic cylinder and can also be used for a structural unit which is replaced from the bottom.

Description

Technical Field

[0001] The present application belongs to the technical field of rolling mill equipment maintenance, and in particular relates to a structural element replacement device for a rolling mill. Background Art

[0002] The HGC hydraulic cylinder of the hot rolling mill is located at the top of the inner side of the rolling mill arch window, installed between the upper support roller and the pressing screw. Each hot rolling mill is equipped with a total of 2 HGC hydraulic cylinders, which are installed on the top of the operating side (OS) and the transmission side (DS) of the rolling mill arch. The HGC hydraulic cylinder is the core equipment of the hot rolling mill. It has the advantages of fast response speed, high control accuracy and small inertia. During the steel rolling process, the HGC hydraulic cylinder plays a role in accurately adjusting the roll gap, and can also intelligently and accurately set the roll gap. It can also perform thickness self-control, pressure control, multiple overload protection and over-travel protection.

[0003] The HGC hydraulic cylinder of the hot rolling mill acts on the upper support roller together with the pressing screw to provide rolling force for the rolling of the strip, and controls the roll gap according to the thickness of the strip, which plays a role in controlling the strip shape. For rolling strips with high specifications and high plate shape requirements, the equipment status of the HGC hydraulic cylinder is extremely important. The HGC hydraulic cylinder of the hot rolling mill is subjected to the reaction force of the rolling force and the internal vibration of the rolling mill for a long time, and the working environment of the HGC hydraulic cylinder is very harsh, with water, steam and a small amount of iron oxide scale, and is in a state of high temperature for a long time and the temperature is very easy to change suddenly. Therefore, the HGC hydraulic cylinder of the hot rolling mill needs to be replaced regularly, and the lower HGC hydraulic cylinder needs to be regularly inspected and maintained.

[0004] The replacement device in the prior art can also assist in replacing the hydraulic cylinder, but the replacement efficiency is poor, which restricts the improvement of production efficiency. Utility Model Content

[0005] The present application aims to solve the technical problem of replacement efficiency at least to a certain extent. To this end, the present application provides a structural element replacement device for a rolling mill, which can match the installation position of the structural element, directly and effectively assist the replacement of the structural elements of the rolling mill under the structural element, and significantly improve the replacement efficiency. It can be used not only to replace hydraulic cylinders, but also to replace structural units from the bottom.

[0006] The embodiment of the present application provides a structural element replacement device for a rolling mill, wherein the part to be replaced includes a structural element, which includes:

[0007] A main frame, which is used to be placed under the installation position of the structural element, and the main frame can be snapped into the part to be replaced;

[0008] a support platform for providing support at the bottom of the structural element, the support platform being located outside the main frame;

[0009] A driving assembly is installed in the main frame, an output end of the driving assembly is connected to the supporting platform, and the driving assembly drives the supporting platform to be lifted and lowered vertically relative to the main frame.

[0010] In an optional embodiment, the drive assembly includes a fluid-driven cylinder and a pressure source mechanism, the pressure source mechanism is fixed to the main frame, the fluid-driven cylinder is installed on the main frame, the output end of the fluid-driven cylinder is connected to the support platform, and the pressure source mechanism is connected to the fluid-driven cylinder.

[0011] In an optional embodiment, the supporting platform includes a platform plate, which is horizontally arranged, the bottom of the platform plate is connected to the output end of the fluid-driven cylinder, and the top of the platform plate faces upward. When the fluid-driven cylinder runs to the maximum stroke, the top of the platform plate abuts against the structural element.

[0012] In an optional embodiment, the supporting platform further comprises a lifting column, the length of which can be adjusted, one end of the lifting column is connected to the platform plate, and the other end of the lifting column is connected to the main frame.

[0013] In an optional embodiment, the lifting column includes a shaft column and a sleeve column, the shaft column and the sleeve column are matched with each other, the shaft column is connected to the platform plate, and the sleeve column is connected to the main frame.

[0014] In an optional embodiment, a plurality of groups of shaft columns and sleeve columns are provided, and each group of shaft columns and sleeve columns are respectively connected to the edge of the platform plate at intervals.

[0015] In an optional embodiment, the main frame includes a first end, a second end and a cross section, and two ends of the cross section are respectively connected to the first end and the second end.

[0016] In an optional embodiment, driving components are respectively installed at both ends of the span section, and the support platform is located outside the span section.

[0017] In an optional embodiment, a base is further included, which is arranged at the bottom of the first end and the second end, and the bottom of the base has a notch, and the notch is used to be clamped with the part to be replaced.

[0018] In an optional embodiment, the main frame is provided with a plurality of grid frames, and the plurality of grid frames are spread over the main frame.

[0019] It can be seen from the above technical solution that the beneficial effects of this application are:

[0020] The main frame of the present application can be inserted into the parts to be replaced, is suitable for narrow spaces, and can match the installation positions of structural elements. By arranging the drive assembly inside the main frame, some space is further saved, and the support platform is located outside the main frame, separating the support platform from the main frame. The drive assembly drives the support platform to rise and fall, and rises until the support platform supports the structural elements. Since the structural elements are heavy, this can provide stable support, directly and effectively assisting the replacement of the rolling mill structural elements under the structural elements. The lifting and lowering process can be completed quickly by directly driving the drive assembly, thereby significantly improving the replacement efficiency of the structural elements, reducing the duration of high-altitude operations, and greatly improving the safety of the replacement process. In addition, the replacement device can not only be used to replace hydraulic cylinders, but also for structural units that are replaced from the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other embodiments and drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of an embodiment of a part to be replaced is shown;

[0023] Figure 2 A schematic diagram of an embodiment of a part to be replaced before replacing a structural element is shown;

[0024] Figure 3 A schematic diagram of an embodiment of a structural element replacement device for a rolling mill according to the utility model is shown;

[0025] Figure 4 A schematic diagram of an embodiment of a structural element replacement device for a rolling mill according to the utility model is shown;

[0026] Figure 5 A schematic diagram showing the use of an embodiment of the structural element replacement device for a rolling mill according to the utility model;

[0027] Figure 6 A schematic diagram showing the use of an embodiment of the structural element replacement device for a rolling mill according to the utility model;

[0028] : 100, replacement device; 110, main frame; 110a, grid frame; 111, first end; 112, second end; 113, cross section; 120, drive assembly; 121, fluid drive cylinder; 122, pressure source mechanism; 130, support platform; 131, platform plate; 132, lifting column; 132a, shaft column; 132b, sleeve column; 140, base; 200, part to be replaced; 210, structural element; 220, pressing screw; 230, working roller; 240, upper support roller; 250, lower support roller; 300, archway; 400, roller changing track. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0034] Please refer to Figure 1 and Figure 2 In an embodiment of the present application, a structural element replacement device of a rolling mill is provided, which is suitable for assisting the replacement of a structural element 210 of a part to be replaced 200. The part to be replaced 200 includes a structural element 210, such as a hydraulic cylinder. The part to be replaced 200 is an integral structure, and the hydraulic cylinder is a component on the part to be replaced 200. Here, the replacement of the HGC hydraulic cylinder is taken as an example. The part to be replaced 200 is a rolling mill, and the rolling mill also includes: a pressing screw rod 220, a working roll 230, an upper support roll 240 and a lower support roll 250. The hydraulic cylinder is connected to the bottom end of the pressing screw rod 220, and the upper support roll 240 is located below the hydraulic cylinder. The upper support roll 240 and the lower support roll 250 are separately arranged up and down, and the two There are two working rolls 230 in a group between them. The part 200 to be replaced is fixed on the arch 300. The bottom of the part 200 to be replaced is provided with a roll changing track 400. A roll changing device for supporting rolls is placed on the roll changing track 400. The roll changing device is movable along the roll changing track 400. During operation, the working rolls 230 and the upper supporting roll 240 are first pulled out of the rolling mill, and then the replacement device 100 is placed on the roll changing device, and the roll changing device is pushed into the rolling mill. The height of the roll changing device is exactly consistent with the height of the lower supporting roll 250, and then the replacement device 100 is placed on the top of the lower supporting roll 250, such as being fixed to both ends of the lower supporting roll 250 in a frame manner to keep it stable, and then the operation of replacing the hydraulic cylinder is performed.

[0035] Please refer to Figure 3 and Figure 4The replacement device 100 includes a main frame 110, a support platform 130 and a drive assembly 120. The main frame 110 is the main structure of the replacement device 100 and provides an installation foundation. A cavity is provided inside the main frame 110. The main frame 110 is used to be placed below the installation position of the structural element 210. The main frame 110 can be inserted into the part to be replaced 200. After the replacement device 100 is inserted into the part to be replaced 200, the main frame 110 corresponds to the position of the structural element 210; the support platform 130 is used to provide support at the bottom of the structural element 210. The support platform 130 is driven by the drive assembly 120 and can be lifted and lowered in the vertical direction. The support platform 130 is located outside the main frame 110. Specifically, the support platform 130 is located at the top of the main frame 110, relative to the main frame 110 can be raised and lowered; the driving component 120 is installed in the main frame 110 and fixed by bolts. A through hole is opened on the top of the main frame 110. The output end of the driving component 120 passes through the through hole to connect to the bottom of the supporting platform 130, and is fixed by screw connection. The driving component 120 drives the supporting platform 130 to be raised and lowered vertically relative to the main frame 110. According to the height of the hydraulic cylinder, only the height of the supporting platform is adjusted. When the driving component 120 drives the supporting platform 130 to rise to a certain height, the top surface of the supporting platform 130 contacts the bottom of the structural element 210. At this time, the supporting platform 130 supports the structural element 210. Here, the driving component 120 is a conventional driving mechanism, such as a cylinder, a hydraulic cylinder, or an electric cylinder. Other driving structures can also be used.

[0036] The replacement device 100 of the prior art can replace the hydraulic cylinder, but during operation, due to the small space, the existing replacement device 100 is provided with a transmission component for assistance, which requires the cooperation of the transmission component, rather than direct drive, and its efficiency is not good. For example, the existing HGC hydraulic cylinder is located at a high position inside the rolling mill, the space is small, and there is no working space. On the other hand, replacing the hydraulic cylinder is an aerial operation, and the HGC hydraulic cylinder replacement process is extremely complicated, and the replacement time is long, and the risk factor is high. However, the main frame 110 of the present application can be inserted into the part to be replaced 200, which is suitable for a small space and can match the installation position of the structural element 210. By setting the drive assembly 120 inside the main frame 110, part of the space is further saved, and the support platform 130 is located outside the main frame 110, and the support platform 130 is separated from the main frame 110. The drive assembly 120 drives the support platform 130 to rise and fall, and rises until the support platform 130 supports the structural element 210. Since the structural element 210 is heavy, this can provide stable support. When the structural element 210 is 0 directly and effectively assists the replacement of the rolling mill structural element 210 below, and is directly driven by the drive assembly 120, so that the lifting process can be completed quickly, thereby significantly improving the replacement efficiency of the structural element 210, reducing the duration of high-altitude operations, and thus greatly improving the safety of the replacement process; the replacement device 100 makes full use of the construction conditions around the rolling mill, creating good conditions for the replacement of the HGC hydraulic cylinder of the rolling mill. According to the current 18 HGC hydraulic cylinders of the hot rolling production line of a steel plant, they are replaced every 5 years, and the replacement time is shortened by 10 hours each time, saving 36 hours of time for replacing HGC hydraulic cylinders each year. In addition, the replacement device 100 can be used not only to replace hydraulic cylinders, but also to replace structural units from the bottom.

[0037] In an optional embodiment, the drive assembly 120 includes a fluid-driven cylinder 121 and a pressure source mechanism 122. The pressure source mechanism 122 provides power for the fluid-driven cylinder 121. The pressure source mechanism 122 is fixed to the main frame 110 by welding or bolting. The fluid-driven cylinder 121 is installed on the main frame 110 by bolting. The output end of the fluid-driven cylinder 121 is connected to the support platform 130. The output end is the drive shaft of the fluid-driven cylinder 121. If the fluid-driven cylinder 121 adopts a hydraulic cylinder, its output end is a hydraulic drive shaft. The pressure source mechanism 122 is connected to the fluid-driven cylinder 121. The pressure source mechanism 122 is a hydraulic station, which is an existing mechanism. The hydraulic station provides continuous hydraulic output to the hydraulic cylinder.

[0038] Please refer to Figure 5 and Figure 6In an optional embodiment, the support platform 130 includes a platform plate 131, which is in the shape of a plate. The platform plate 131 is horizontally arranged so that the top of the platform plate 131 can contact the bottom of the structural element 210 in a horizontal state to provide a stable supporting force. The bottom of the platform plate 131 is connected to the output end of the fluid-driven cylinder 121, such as the end of the driving shaft is fixed to the bottom of the platform plate 131 by a screw, and the top of the platform plate 131 faces upward. When the fluid-driven cylinder 121 runs to the maximum stroke, the top of the platform plate 131 abuts against the structural element 210. During operation, the structural element 210 is supported, and the operator directly removes the structural element 210 from the bottom end of the pressing screw 220 to separate the structural element 210 from the part 200 to be replaced, and then drives the support platform 130 to descend through the driving component 120, and the support platform 130 returns to the initial position, and finally the replacement device 100 is pulled out of the rolling mill through the roll changing device; on the contrary, when replacing the upper structural element 210, a reverse lifting operation is performed, and then the structural element 210 is connected with a lifting lock, and finally the structural element 210 is installed.

[0039] In an optional embodiment, the support platform 130 also includes a lifting column 132, which can adjust the length. The lifting column 132 adopts a retractable mechanism, such as an existing telescopic rod. One end of the lifting column 132 is connected to the platform plate 131 and the other end is connected to the main frame 110. The top end of the lifting column 132 is fixed to the bottom of the platform plate 131 by screws, and the bottom end of the lifting column 132 is fixed to the outer side of the main frame 110 by screws. The lifting direction of the support platform 130 can be limited by the lifting column 132, which mainly plays a guiding role to prevent the excessive weight of the structural element 210 from causing the output end of the drive component 120 to deviate in the telescopic direction. In an optional embodiment, the lifting column 132 includes a shaft column 132a and a sleeve column 132b. The shaft column 132a and the sleeve column 132b are matched with each other, and the shaft column 132a is inserted into the sleeve column 132b to form a retractable mechanism. The end of the shaft column 132a is welded to the platform plate 131, and the end of the sleeve column 132b is welded to the main frame 110. There is no mutual driving effect between the shaft column 132a and the sleeve column 132b. The shaft column 132a and the sleeve column 132b can assist in maintaining the output direction of the drive assembly 120. In an optional embodiment, multiple groups of shaft columns 132a and sleeve columns 132b are provided, and each group of shaft columns 132a and sleeve columns 132b are respectively connected to the edge of the platform plate 131 at intervals. For example, a total of 4 groups are provided, and the top ends of the 4 groups of shaft columns 132a are fixed to the edge of the platform plate 131 by screws, and adjacent shaft columns 132a are spaced apart, and the sleeve columns 132b are matched. The bottom ends of the sleeve columns 132b are welded to the outside of the main frame 110.

[0040] In an optional embodiment, the main frame 110 includes a first end 111, a second end 112 and a cross section 113, the two ends of the cross section 113 are respectively connected to the first end 111 and the second end 112, the cross section 113 spans the position of the lower support roller 250, the two ends of the cross section 113 are located above the shaft seats connected to the two ends of the lower support roller 250, and the first end 111 and the second end 112 are respectively seated on the shaft seats at the two ends. In an optional embodiment, the two ends of the cross section 113 are respectively installed with a driving assembly 120, so that two driving assemblies 120 are installed, and two supporting platforms 130 are also provided, so that the two hydraulic cylinders of the rolling mill can be replaced at the same time, the two driving assemblies 120 are independently controlled, and the supporting platform 130 is located outside the cross section 113, specifically, the platform plate 131 is located above the cross section 113, and the lifting column 132 is located on the side of the cross section 113, and the supporting platform 130 can be lifted and lowered outside the main frame 110 and is not affected by the main frame 110. In an optional embodiment, a base 140 is further included, which is arranged at the bottom of the first end 111 and the second end 112. The base 140 is in direct contact with both ends of the lower support roller 250. The bottom of the base 140 has a recess, which is used to clamp with the part to be replaced 200. The main frame 110 can be stably placed on the lower support roller 250 through the base 140.

[0041] In an optional embodiment, the main frame 110 is provided with a plurality of grid frames 110a, and the plurality of grid frames 110a are spread throughout the main frame 110. Through the grid frames 110a, the operator can easily climb to the position of the platform plate 131 to perform the disassembly operation of the hydraulic cylinder. At the same time, the grid frames 110a are in the form of through holes, which can also save the material and weight of the main frame 110. In an optional embodiment, before the hydraulic cylinder is disassembled, a hard pad can be placed at the bottom of the support platform 130, and the hard pad is placed on the top of the main frame 110, such as supporting between the platform plate 131 and the main frame 110, which can ensure the safety of the construction process. After the hydraulic cylinder is disassembled, the hard pad is removed before the support platform 130 needs to be lowered.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "optional example" or "optional implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0043] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0044] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A structural element replacement device for a rolling mill, wherein the part to be replaced (200) comprises a structural element (210), characterized in that: include: A main frame (110) is used to be placed below the installation position of the structural element (210), and the main frame (110) can be inserted into the part to be replaced (200); A support platform (130) for providing support at the bottom of the structural element (210), wherein the support platform (130) is located outside the main frame (110); A driving component (120), wherein the driving component (120) is installed in the main frame (110), an output end of the driving component (120) is connected to the supporting platform (130), and the driving component (120) drives the supporting platform (130) to be able to rise and fall in the vertical direction relative to the main frame (110).

2. The structural element replacement device of a rolling mill according to claim 1, characterized in that: The driving assembly (120) comprises a fluid-driven cylinder (121) and a pressure source mechanism (122); the pressure source mechanism (122) is fixed to the main frame (110); the fluid-driven cylinder (121) is installed on the main frame (110); the output end of the fluid-driven cylinder (121) is connected to the supporting platform (130); and the pressure source mechanism (122) is connected to the fluid-driven cylinder (121).

3. The structural element replacement device of a rolling mill according to claim 2, characterized in that: The supporting platform (130) comprises a platform plate (131), wherein the platform plate (131) is arranged horizontally, the bottom of the platform plate (131) is connected to the output end of the fluid-driven cylinder (121), and the top of the platform plate (131) faces upward. When the fluid-driven cylinder (121) runs to a maximum stroke, the top of the platform plate (131) abuts against the structural element (210).

4. The structural element replacement device of a rolling mill according to claim 3, characterized in that: The supporting platform (130) further comprises a lifting column (132), the length of which can be adjusted, one end of the lifting column (132) being connected to the platform plate (131) and the other end being connected to the main frame (110).

5. The structural element replacement device of a rolling mill according to claim 4, characterized in that: The lifting column (132) comprises a shaft column (132a) and a sleeve column (132b), wherein the shaft column (132a) and the sleeve column (132b) are matched with each other, the shaft column (132a) is connected to the platform plate (131), and the sleeve column (132b) is connected to the main frame (110).

6. The structural element replacement device of a rolling mill according to claim 5, characterized in that: The shaft column (132a) and the sleeve column (132b) are provided in a plurality of groups, and each group of the shaft column (132a) and the sleeve column (132b) are respectively connected to the edge of the platform plate (131) at intervals.

7. The structural element replacement device of a rolling mill according to claim 1, characterized in that: The main frame (110) comprises a first end (111), a second end (112) and a cross section (113), and two ends of the cross section (113) are respectively connected to the first end (111) and the second end (112).

8. The structural element replacement device of a rolling mill according to claim 7, characterized in that: The driving components (120) are respectively installed at both ends of the cross section (113), and the supporting platform (130) is located outside the cross section (113).

9. The structural element replacement device of a rolling mill according to claim 7, characterized in that: It also includes a base (140) disposed at the bottom of the first end (111) and the second end (112); the bottom of the base (140) has a notch, and the notch is used to be locked with the part to be replaced (200).

10. The structural element replacement device of a rolling mill according to claim 1, characterized in that: The main frame (110) is provided with a plurality of grid frames (110a), and the plurality of grid frames (110a) are distributed throughout the main frame (110).

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