Quick replacement method for water beam assembly of super-large sintering mixer

Abstract

The present application belongs to the technical field of sinter production, and particularly relates to a quick replacement method of a water beam assembly of a super-large sintering mixer. At least three lining plates are evenly taken off from the bottom of the inner surface of a mixer cylinder, and are evenly distributed in the axial direction of the inner surface of the mixer cylinder. At least three lifting points are welded at the center of the lower lining plates, and are numbered as lifting point one, lifting point two and lifting point three from left to right. Meanwhile, three hanging points are welded at positions corresponding to the three lifting points above the water beam, and are numbered as hanging point one, hanging point two and hanging point three. The problems of water beam dragging and instability of steel wire rope caused by the downward bending of the steel wire rope in the original water beam installation method are solved. The whole installation process of the water beam is safe and reliable, and damage to the inner cylinder of the mixer during the installation process of the water beam is effectively prevented. The construction method effectively saves the construction time, and the construction time is sufficient and controllable by utilizing the overhaul time of the sintering machine.

Description

Technical Field

[0001] This invention belongs to the field of sinter production technology, specifically relating to a method for rapid replacement of water beam components in an extra-large sintering mixer. Background Technology

[0002] In sinter production, the sintering mixer is a key piece of equipment that receives materials from the previous batching process and effectively mixes and granulates them. It is one of the main production line equipment in sinter production. The water beam, serving as the skeleton support for the nozzles in the sintering mixer, provides stable and reliable support for the water spray. Due to the high temperature, high humidity, high corrosion, and high wear conditions the water beam operates under, its current service life is 3-5 years. During regular maintenance of the sintering process line, a static inspection of the water beam is required. If irreversible corrosion cracks appear in the water beam, it must be replaced quickly during the annual maintenance period.

[0003] Currently, the method for replacing the water beam in the mixer involves a combination of crane and wire rope suspension and pulling. Because the water beam is nearly 30m long, the mixer cylinder diameter is only 5m, and the mixer has an inclined structure with a 1.7m height difference between the center of the beginning and end, and a confined internal space, the existing method involves using a single wire rope running through the cylinder, secured on both sides by supports. Multiple pulleys and lifting rings are evenly fitted onto the wire rope, and the mixer is gradually moved from one end to the other by connecting the pulleys and lifting rings to the top lifting point of the water beam. This method inevitably leads to wire rope deflection, which can cause the water beam to drag at the bottom of the cylinder, resulting in wire rope instability and even collapse of the water beam. This severely damages the strength of the mixer cylinder and its internal lining, significantly hinders the annual maintenance schedule of the entire sintering production line, and affects the stable production of sintered ore.

[0004] Therefore, it is urgent to research and implement a rapid installation method for the water beam assembly of an ultra-large sintering mixer. Summary of the Invention

[0005] The purpose of this invention is to provide a method for quickly replacing the water beam assembly of an extra-large sintering mixer.

[0006] The technical solution adopted by this invention to solve its technical problem is: a method for rapid replacement of the water beam assembly of an extra-large sintering mixer, comprising the following steps:

[0007] 1) Remove at least three liner plates evenly from the bottom of the inner surface of the mixer cylinder and distribute them evenly in the axial direction of the inner surface of the mixer cylinder. Weld at least three lifting points at the center of the lower liner plates, numbered from left to right as Lifting Point 1, Lifting Point 2, and Lifting Point 3. At the same time, weld three hanging points above the water beam at positions corresponding to the three lifting points, numbered as Hanging Point 1, Hanging Point 2, and Hanging Point 3.

[0008] 2) Connect the crane hook to hanging point two, and connect hanging point one to hanging point three through the first chain hoist. Make timely fine adjustments to the direction of the water beam using the direction rope to ensure that the water beam is along the axis of the cylinder. By pulling the first chain hoist and cooperating with the crane, slowly lift the water beam and gradually enter the inside of the mixer cylinder from left to right.

[0009] 3) When the third hanging point of the water beam reaches the vicinity of the first hanging point of the mixer body, connect the second hanging point of the mixer body and the third hanging point of the water beam through the second chain hoist, disconnect the first hanging point from the third hanging point, and at the same time use the second crane to connect the first hanging point of the mixer water beam.

[0010] 4) With the cooperation of the second chain hoist and the second crane, the water beam continues to move along the axis of the mixer. When the third hanging point of the water beam reaches near the lower part of the second hanging point of the mixer cylinder, the third chain hoist reliably connects the third hanging point of the mixer cylinder and the third hanging point of the water beam. Then, the connection between the second hanging point and the third hanging point is released.

[0011] 5) With the cooperation of the third chain hoist and the second crane, the water beam continues to move along the axis of the mixer. When the first hanging point of the water beam is about to enter the cylinder, the first chain hoist connects the first hanging point of the mixer to the first hanging point. Then, the crane hook is disconnected from the first hanging point of the water beam and connected to the hook at the tail of the water beam.

[0012] 6) With the cooperation of the first chain hoist, the third chain hoist and the second crane, the water beam is moved further along the axis of the mixer. Through fine adjustment, the lower plane of the left and right bases of the water beam is aligned with the bolt holes on the upper surface of support one and the upper surface of support two, respectively.

[0013] Specifically, step 1) also includes starting the mixer with micro-drive, rotating the three welded hanging points to be directly above the central axis of the mixer cylinder; then stopping the machine, welding two hanging points at the front and back of the upper middle part of the outer surface of the mixer cylinder, and locking the mixer at four points with a chain hoist to ensure that the mixer cylinder does not rotate during construction.

[0014] Specifically, step 6) also includes installing the mixer water beam protective cover, installing the mixer nozzle assembly, cutting off the mixer cylinder hanging points, resetting the liner, cleaning the site, testing the machine, and ending the installation of the water beam assembly.

[0015] The present invention has the following beneficial effects:

[0016] 1) Solved the problems of water beam dragging to the bottom and steel wire rope instability caused by the downward deflection of steel wire rope in the original water beam installation method;

[0017] 2) The entire installation process of the water beam is safe and reliable, effectively preventing damage to the inner cylinder of the mixer during the installation process;

[0018] 3) This construction method effectively saves construction time, making full and controllable construction time by utilizing the overhaul time of the sintering machine. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the cylinder structure.

[0021] Figure 3 This is a schematic diagram of the water beam structure.

[0022] Figure 4 A schematic diagram of the structure for fixing the mixer cylinder.

[0023] Figure 5 A schematic diagram of the structure for installing the water beam (I).

[0024] Figure 6 Schematic diagram of the structure for water beam installation (II).

[0025] Figure 7 Schematic diagram of the structure for water beam installation (III).

[0026] Figure 8 Schematic diagram of the structure for water beam installation (IV).

[0027] Figure 9 Schematic diagram of the structure for water beam installation (V).

[0028] Figure 10 This is a schematic diagram of the existing technology.

[0029] In the diagram: 1-Water beam, 101-Hanging point one, 102-Hanging point two, 103-Hanging point three, 104-Tail hook; 2-Cylinder, 201-Hanging point one, 202-Hanging point two, 203-Hanging point three; 3-Support one; 4-Support two; 5-Water beam protective cover; 6-Nozzle assembly; 7-First crane; 8-Direction rope; 9-Second crane. Detailed Implementation

[0030] The invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figure 1-5 A method for quick replacement of the water beam assembly of an extra-large sintering mixer includes the following steps:

[0032] S1: Coordinate maintenance time and prepare spare parts and tools for the water beam.

[0033] S2: Power outage sign posted, mixer shut down, construction personnel and spare parts / tools enter the mixer drum.

[0034] S3: Remove three (or more, not limited to three) liner plates evenly from the bottom inner surface of the mixer cylinder 2, and distribute them evenly along the axial direction of the inner surface of the mixer cylinder 2. Weld three (not limited to three) secure hanging points to the center of each lower liner plate. Figure 2 As shown, the lifting points are numbered from left to right as Lifting Point 1 201, Lifting Point 2 202, and Lifting Point 3 203; simultaneously, three hanging points are welded above the water beam 1 at the same intervals as the three lifting points, as shown. Figure 3 As shown, the attachment points are numbered 101, 102, and 103.

[0035] S4: Maintenance personnel and spare parts tools are removed, and the mixer is started with micro-drive; rotate the three welded hanging points to be directly above the central axis of the mixer cylinder 2.

[0036] S5: As Figure 4 As shown, stop the machine, weld two hanging points at the front and back of the upper middle part of the outer surface of the mixer cylinder 2, and use a chain hoist to lock the mixer at four points to ensure that the mixer cylinder does not rotate during construction.

[0037] S6: As Figure 5 As shown, the construction workers enter the mixing drum 2 and reliably connect the crane hook to the second hanging point 102. The first hanging point 201 and the third hanging point 103 are connected by the first chain hoist. With the help of two people working from the front and back, the two direction ropes 8 at the end of the water beam are used to make timely fine adjustments to the direction of the water beam to ensure that the water beam 1 is along the axis of the drum 2. By pulling the first chain hoist and cooperating with the first crane 7, the water beam 1 is slowly lifted and gradually enters the mixing drum 2 from left to right.

[0038] S7: As shown in Figure 6, when the third hanging point 103 of the water beam 1 reaches the vicinity of the lower position of the first hanging point 201 of the mixer cylinder 2, the second chain hoist connects the second hanging point 202 of the mixer cylinder and the third hanging point 103 of the water beam. Then, the connection between the first hanging point 201 and the third hanging point 103 is released, and the second crane 9 is used to connect the first hanging point 101 of the mixer water beam. Then, the first crane 7 is removed from the site.

[0039] S8: As Figure 7 As shown, with the cooperation of the second chain hoist and the second crane 9, the water beam 1 continues to move along the axis of the mixer. When the hanging point 3 103 of the water beam reaches near the lower part of the hanging point 202 of the mixer body, the hanging point 3 203 of the mixer body and the hanging point 3 103 of the water beam are connected by the third chain hoist, and then the hanging point 202 and the hanging point 3 103 are disconnected.

[0040] S9: As Figure 8As shown, with the cooperation of the third chain hoist and the second crane 9, the water beam 1 continues to move along the axis of the mixer. When the water beam 1 hanging point 101 is about to enter the cylinder 2, the first chain hoist connects the mixer hanging point 201 with the hanging point 101. Then, the crane hook is disconnected from the water beam hanging point 101 and connected to the water beam tail hook 104.

[0041] S10: As Figure 9 As shown, through the cooperation of the first chain hoist, the third chain hoist, and the second crane 9, the water beam 1 continues to be translated along the axis of the mixer. Through fine adjustment, the lower plane of the left and right bases of the water beam 1 is aligned with the bolt holes on the upper surface of support 1 3 and support 2 4, respectively. The second crane 9 is then released, and the water beam 1 is bolted and welded to support 1 3 and support 2 4. The first chain hoist and the second chain hoist are then released.

[0042] S11: Install the water beam protective cover 5 for the mixer and the water beam nozzle assembly 6.

[0043] S12: Cut off the two hanging points of the mixer cylinder and reset the liner.

[0044] S12: Clean up the site and remove the mixer drum 2 from the site.

[0045] S13: Test run, completion of water beam assembly installation.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for rapid replacement of the water beam assembly of an extra-large sintering mixer, characterized in that, Includes the following steps: 1) Remove at least three liner plates evenly from the bottom of the inner surface of the mixer cylinder and distribute them evenly in the axial direction of the inner surface of the mixer cylinder. Weld at least three lifting points at the center of the lower liner plates, numbered from left to right as Lifting Point 1, Lifting Point 2, and Lifting Point 3. At the same time, weld three hanging points above the water beam at positions corresponding to the three lifting points, numbered as Hanging Point 1, Hanging Point 2, and Hanging Point 3. 2) Connect the crane hook to hanging point two, and connect hanging point one to hanging point three through the first chain hoist. Make timely fine adjustments to the direction of the water beam using the direction rope to ensure that the water beam is along the axis of the cylinder. By pulling the first chain hoist and cooperating with the crane, slowly lift the water beam and gradually enter the inside of the mixer cylinder from left to right. 3) When the third hanging point of the water beam reaches the vicinity of the first hanging point of the mixer body, connect the second hanging point of the mixer body and the third hanging point of the water beam through the second chain hoist, disconnect the first hanging point from the third hanging point, and at the same time use the second crane to connect the first hanging point of the mixer water beam. 4) With the cooperation of the second chain hoist and the second crane, the water beam continues to move along the axis of the mixer. When the third hanging point of the water beam reaches near the lower part of the second hanging point of the mixer cylinder, the third chain hoist reliably connects the third hanging point of the mixer cylinder and the third hanging point of the water beam. Then, the connection between the second hanging point and the third hanging point is released. 5) With the cooperation of the third chain hoist and the second crane, the water beam continues to move along the axis of the mixer. When the first hanging point of the water beam is about to enter the cylinder, the first chain hoist connects the first hanging point of the mixer to the first hanging point. Then, the crane hook is disconnected from the first hanging point of the water beam and connected to the hook at the tail of the water beam. 6) With the cooperation of the first chain hoist, the third chain hoist and the second crane, the water beam is moved further along the axis of the mixer. Through fine adjustment, the lower plane of the left and right bases of the water beam is aligned with the bolt holes on the upper surface of support one and the upper surface of support two, respectively.

2. The method for rapid replacement of the water beam assembly of an extra-large sintering mixer according to claim 1, characterized in that, Step 1) further includes starting the mixer with micro-drive, rotating the three welded hanging points to be directly above the central axis of the mixer cylinder; then stopping the machine, welding two hanging points at the front and back of the upper middle part of the outer surface of the mixer cylinder, and using a chain hoist to lock the mixer at four points to ensure that the mixer cylinder does not rotate during construction.

3. The method for rapid replacement of the water beam assembly of an extra-large sintering mixer according to claim 1, characterized in that, Step 6) also includes installing the water beam protective cover for the mixer, installing the mixer nozzles, cutting off the hanging points on the mixer cylinder, resetting the liner, cleaning the site, testing the machine, and ending the installation of the water beam assembly.

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