Quick change roll shifting cylinder device and method

Abstract

The application discloses a kind of fast replacement roll shift cylinder device and method, device includes the support platform being arranged above work roll slide way beam, and mobile trolley being arranged on support platform;Wherein, mobile trolley includes trolley platform, the CVC block support device being arranged above trolley platform, mobile device below trolley;The support device can adjust height.Application this device and method, it is convenient to remove and reload roll shift cylinder, need not install original upper beam and chain block, and the jack supported below, save process, increase safety.Application this device, it is convenient to reload lower CVC block, benefit observation less workload, reduce construction intensity.

Description

Technical Field

[0001] This invention relates to the field of CVC maintenance technology in finishing mills, specifically to a device and method for quickly replacing skewed roll cylinders. Background Technology

[0002] The 2250mm rolling line uses seven CVC four-high mills for continuous slab rolling in continuous production. A roll-shifting mechanical system circulates the work rolls to ensure uniform wear on the rolls in the steel edge area. However, during long-term rolling, due to axial force, mill vibration, and temperature, the roll-shifting hydraulic cylinders may experience oil leakage after prolonged operation. This leads to increased workload and lower efficiency due to the confined working environment and difficulty in observation during reloading, resulting in a more labor-intensive process.

[0003] The original replacement method involved lifting the upper support roller and then using a suspended chain hoist for dismantling. It also required placing a 10t mechanical jack under the CVC block to prevent the lower CVC block from falling off the back plate step when the roller cylinder was being removed. Therefore, the original replacement method was time-consuming and inconvenient. Summary of the Invention

[0004] In view of the above-mentioned defects in the prior art, the present invention provides a device and method for quickly replacing the roller cylinder, so as to solve the problems of long replacement time and inconvenience in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The quick-change roller cylinder device includes a support platform mounted above the work roll slide beam and a moving trolley mounted on the support platform; wherein the moving trolley includes a trolley platform, a CVC block support device mounted above the trolley platform, and a moving device below the trolley; the support device is height-adjustable.

[0007] The support device includes two pairs of adjusting bolts set on the upper surface of the trolley platform. The spacing between the two pairs of adjusting bolts corresponds to the spacing between the two sets of CVC blocks. The spacing between the two bolts in the same pair of adjusting bolts is determined according to the length of the CVC block.

[0008] Based on the size and spacing of the CVC blocks, a corresponding number of through holes are made on the trolley platform. The nuts of the adjusting bolts are welded above the through holes, and the support screws and nuts are matched and connected. The support screws have a certain adjustment margin.

[0009] The moving device includes two pairs of bearings or rollers disposed on both sides of the trolley platform.

[0010] The method for quickly replacing the roller cylinder includes the following steps:

[0011] Step 1: Fabricate a quick-change roller cylinder device according to the site conditions;

[0012] Step 2: Fix the support platform above the work roller slide beam, and place the moving trolley on the support platform;

[0013] Step 3: Based on the position of the CVC block, push the moving trolley under the CVC block and adjust the relative position of the bolt and the CVC block.

[0014] Step 4: Adjust the height of the support screw until the lower CVC block is lifted up;

[0015] Step 5: Remove the pressure plate and related accessories of the lower CVC block, push the lower CVC block out, and ensure space for replacing the roller cylinder;

[0016] Step 6: After the roller cylinder is replaced, push the lower CVC block back to its original position for installation.

[0017] The manufacturing method of the quick-change roller cylinder device is as follows:

[0018] First, prepare a steel plate of a certain thickness as the base plate for the mobile trolley; second, determine the bolt hole positions according to the actual dimensions on site and open through holes; then, weld the nuts of the adjusting bolts above the through holes and match and connect the support screws to the through holes; finally, weld ball bearings on both sides of the base plate as the walking structure of the mobile trolley.

[0019] The following process is included before step 2:

[0020] Place an I-beam above the upper CVC block and fix a 1t hand chain hoist on the I-beam to hold the lower CVC block in place.

[0021] The specific process for replacing the roller cylinder is as follows:

[0022] First, after removing the lower CVC block pressure plate, remove the position sensor and cylinder head bolts in sequence, then remove the roller cylinder, check the seals and oil retainer rings on the cylinder head and cylinder rod, and replace them; second, reinstall the new roller cylinder and reinstall the lower CVC block in its original position; then, reinstall the cylinder head bolts, pull out the cylinder rod and reinstall the nut; finally, reinstall the position sensor and CVC pressure plate.

[0023] The support platform in step 2 is prefabricated using 30mm thick steel plates, based on the structure of the slide beam.

[0024] Selection of the specifications of the adjusting bolt

[0025] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0026] 1. The application of this device and method facilitates the disassembly and reassembly of the roller cylinder, eliminating the need to install the original upper beam, hand-operated hoist, and supporting jacks below, thus saving procedures and increasing safety.

[0027] 2. Using this device makes it easy to reinstall the CVC block, facilitates observation with less work, and reduces construction intensity. Attached Figure Description

[0028] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their focus is on illustrating the gist of the invention.

[0029] Figure 1 This is a schematic diagram of the replacement method for the roller cylinder in the prior art.

[0030] Figure 2 This is a front view of the structure of the roller cylinder replacement device of the present invention.

[0031] Figure 3 This is a side view of the structure of the roller cylinder replacement device of the present invention.

[0032] Figure 4 This is a top view of the structure of the roller cylinder replacement device of the present invention.

[0033] Figure 5 This is a flowchart of the roller cylinder replacement method of the present invention.

[0034] The markings in the diagram are as follows: 1-Mobile trolley platform; 2-Adjusting bolt; 3-Nut; 4-Screw; 5-Bearing; 6-Lower CVC block; 7-Upper CVC block; 8-Pressure plate; 9-Carrying beam; 10-Hand chain hoist. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0036] This application provides a device for easy extraction and reinstallation. A support platform is pushed into the mill stand before the locking plate is removed. The device is then pushed onto the replacement platform, and the extension / retraction amount is adjusted by adjusting the bolts on the device to ensure that the lower CVC block can be lifted. After removing the locking nut of the roll cylinder, the cylinder rod is pushed into the cylinder barrel to facilitate the translation of the lower CVC block, creating conditions for the extraction of the roll cylinder.

[0037] The quick-change roller cylinder device includes a support platform mounted above the work roll slide beam and a moving trolley mounted on the support platform; wherein the moving trolley includes a trolley platform, a CVC block support device mounted above the trolley platform, and a moving device below the trolley; the support device is height-adjustable.

[0038] The support device includes two pairs of adjusting bolts set on the upper surface of the trolley platform. The spacing between the two pairs of adjusting bolts corresponds to the spacing between the two sets of CVC blocks. The spacing between the two bolts in the same pair of adjusting bolts is determined according to the length of the CVC block.

[0039] Based on the size and spacing of the CVC blocks, a corresponding number of through holes are made on the trolley platform. The nuts of the adjusting bolts are welded above the through holes, and the support screws and nuts are matched and connected. The support screws have a certain adjustment margin.

[0040] Specific embodiments, such as Figures 1 to 4 As shown,

[0041] The quick-change roller cylinder device includes a support platform set above the work roller slide beam and a moving trolley set on the support platform; wherein the moving trolley includes a trolley platform 1, a CVC block support device set above the trolley platform 1, and a moving device below the trolley; the support device is height adjustable.

[0042] The trolley platform is prefabricated using a 20mm thick steel plate as its foundation. Bolt hole positions are selected based on actual site dimensions, and holes are drilled using a horizontal drilling machine. To ensure stable support and adjustable lifting, four 32*50mm adjusting bolts 2 are installed on the trolley platform. Nuts 3 are welded above the holes, and support screws and nuts are matched and connected. The support screws have a certain adjustment margin, and the lifting amount is adjusted by adjusting the support screws 4. Ball bearings 5 ​​are welded to both sides of the trolley platform to facilitate the smooth removal of the lower CVC block 6, creating the necessary position for replacing the roller cylinder. To prevent the CVC block from tipping over during movement, a 200mm I-beam is placed on the upper CVC block 7, and a 1t hand-operated hoist is suspended for fixation.

[0043] The four adjusting bolts form two pairs, and the spacing between the two pairs of adjusting bolts corresponds to the spacing between the two sets of CVC blocks; the spacing between the two bolts in the same pair of adjusting bolts is determined according to the length of the CVC block.

[0044] The device does not require a spreader beam 9 and a hand-operated hoist 10.

[0045] The method for quickly changing the eccentric roller cylinder using this device, such as... Figure 5 As shown, it includes the following steps:

[0046] Step 1: Construction preparation. A quick-change roller cylinder device will be fabricated based on site conditions. The specific process is as follows:

[0047] Step 1.1: Prepare a steel plate of a certain thickness as the base plate of the mobile trolley; measure the bolt hole spacing and position according to the CVC block, and use a horizontal drilling machine to open through holes;

[0048] Step 1.2: Weld the nut of the adjusting bolt to the top of the through hole, and connect the support screw to the through hole;

[0049] Step 1.3, Bolt selection. Bolts are used for jacking and support;

[0050] Step 1.4: Weld ball bearings to both sides of the base plate as the walking structure of the mobile trolley;

[0051] Step 1.5: Platform Selection. A support platform is laid above the working roller slide beam. It is prefabricated using 30mm thick steel plates and a special platform is made according to the slide beam.

[0052] Step 2: Place an I-beam above the upper CVC block and fix a 1t hand chain hoist on the I-beam to hold the lower CVC block in place; fix the support platform above the work roller slide beam and place the moving trolley on the support platform.

[0053] Step 3: Based on the position of the CVC block, push the moving trolley under the CVC block and adjust the relative position of the bolt and the CVC block.

[0054] Step 4: Adjust the height of the support screw until the lower CVC block is lifted up;

[0055] Step 5: Remove the pressure plate 8 of the lower CVC block and related accessories, remove the position sensor and cylinder head bolts in sequence, push out the lower CVC block to ensure space for replacing the roller cylinder, then remove the roller cylinder, check the seals and oil retainer rings on the cylinder head and cylinder rod, and replace them.

[0056] Step 6: Reinstall the new roller cylinder. After the roller cylinder has been replaced, push the lower CVC block back to its original position for installation.

[0057] Step 7: Reinstall the cylinder head bolts, pull out the cylinder rod and reinstall the nuts; then reinstall the position sensor and CVC pressure plate;

[0058] Step 8: Reinstall the CVC pressure plate, then pull out the mobile trolley, start the pressure test, and clean up the site.

[0059] The support platform is prefabricated using 30mm thick steel plates, based on the structure of the slide beam.

[0060] Selection of the specifications of the adjusting bolt

[0061] Before replacing the bending roller cylinder, push this platform under the CVC block, and lift the lower CVC block by adjusting the height of the support screw. After removing the lower CVC baffle, it is easy to push the lower CVC block out, saving time for replacement.

[0062] After the roller cylinder is replaced, the lower CVC block can be easily pushed back onto the boss on the back plate. Since removing the roller cylinder only requires pushing out the front half to create space for replacement, the lower CVC block near the drive side remains on the boss on the back plate and can be pulled back to its original position using a 1t hand chain hoist.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0065] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0066] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0067] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0068] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0069] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A method for quickly replacing a roller cylinder, characterized in that: Includes the following steps: Step 1: Fabricate a quick-change roller cylinder device according to the site conditions. The quick-change roller cylinder device includes a support platform set above the work roller slide beam and a moving trolley set on the support platform. The moving trolley includes a trolley platform, a CVC block support device set above the trolley platform, and a moving device below the trolley. The support device is height-adjustable. First, prepare a steel plate of a certain thickness as the base plate of the moving trolley. Second, determine the bolt hole positions according to the actual dimensions of the site and open through holes. Then, weld the nuts of the adjusting bolts above the through holes and match and connect the support screws and the through holes. Finally, weld ball bearings on both sides of the base plate as the walking structure of the moving trolley. The trolley platform is prefabricated using a 20mm thick steel plate as the base. The bolt hole positions are selected according to the actual dimensions of the site, and holes are opened using a horizontal drilling machine. Step 2: Fix the support platform above the working roller slide beam, and place the moving trolley on the support platform; the support platform is prefabricated using 30mm thick steel plate according to the structure of the slide beam; Step 3: Based on the position of the CVC block, push the moving trolley under the CVC block and adjust the relative position of the bolt and the CVC block. Step 4: Adjust the height of the support screw until the lower CVC block is lifted up; Step 5: Remove the pressure plate and related accessories of the lower CVC block, push the lower CVC block out, and ensure space for replacing the roller cylinder; Step 6: After the roller cylinder is replaced, push the lower CVC block back to its original position for installation.

2. The method for quickly changing the roller cylinder according to claim 1, characterized in that: The support device includes two pairs of adjusting bolts set on the upper surface of the trolley platform. The spacing between the two pairs of adjusting bolts corresponds to the spacing between the two sets of CVC blocks. The spacing between the two bolts in the same pair of adjusting bolts is determined according to the length of the CVC block.

3. The method for quickly changing the roller cylinder according to claim 2, characterized in that: Based on the size and spacing of the CVC blocks, a corresponding number of through holes are made on the trolley platform. The nuts of the adjusting bolts are welded above the through holes, and the support screws and nuts are matched and connected. The support screws have a certain adjustment margin.

4. The method for quickly changing the roller cylinder according to claim 1, characterized in that: The moving device includes two pairs of bearings or rollers disposed on both sides of the trolley platform.

5. The method for quickly changing the roller cylinder according to claim 1, characterized in that: The following process is also included between steps 4 and 5: Place an I-beam above the upper CVC block and fix a 1t hand chain hoist on the I-beam to hold the lower CVC block in place.

6. The method for quickly changing the roller cylinder according to claim 1, characterized in that: The specific process for replacing the roller cylinder is as follows: First, after removing the lower CVC block pressure plate, remove the position sensor and cylinder head bolts in sequence, then remove the roller cylinder, check the seals and oil retainer rings on the cylinder head and cylinder rod, and replace them; second, reinstall the new roller cylinder and reinstall the lower CVC block in its original position; then, reinstall the cylinder head bolts, pull out the cylinder rod and reinstall the nut; finally, reinstall the position sensor and CVC pressure plate.

7. The method for quickly changing the roller cylinder according to claim 1, characterized in that: The adjusting bolt is selected with a specification of Ø32*55mm.

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