Overall disassembly and assembly transfer method of powerful mixer

Abstract

The invention belongs to the technical field of mechanical and electrical installation and dismantling, and provides an integral dismantling and transferring method of a powerful mixer, which comprises the following steps: firstly, prefabricating a transferring platform of a steel structure, dismantling a wall body, an electric control system and the like of a building part, manufacturing an installation equipment translation track by using H-shaped steel, and dismantling accessories according to the structure of each component; a straight carrying tank is arranged on a strong mixing machine base in a lining mode, lifting lugs are welded to the ends of H-shaped steel on the two sides of the strong mixing machine base, an equipment body is horizontally moved to an external transfer platform through a chain block, the equipment body is lifted away through a crane, and meanwhile reverse-sequence installation can be carried out; the main structure of a building does not need to be damaged, a feed port and a lower discharge door device of the powerful mixer do not need to be disassembled, and an effective space is quickly and efficiently utilized to complete overall disassembly, assembly and transfer of large heavy equipment.

Description

Technical Field

[0001] This invention belongs to the field of electromechanical installation and dismantling technology, and relates to the overall installation and dismantling of a high-power mixer, specifically a method for the overall dismantling, assembly, and transportation of a high-power mixer. Background Technology

[0002] The high-intensity mixer is a key piece of equipment in the pelletizing department's mixing process. It is installed on the building platform of the blending room in the blending system, connecting to the conveyor belt discharge port at the top and the conveyor belt feed port at the bottom. The main unit weighs over 10 tons and is quite large in size. Accessories include a hydraulic station, two sets of electrical control cabinets, and a field control box. Due to the relatively large size and weight of the equipment, and the fact that the installation reference surface is approximately 4.3 meters above the outdoor ground level, the disassembly, assembly, and transportation of the equipment are classified as Level 3 high-risk operations. Furthermore, as the high-intensity mixer is an imported piece of equipment with a high degree of automation, the disassembly and assembly processes must be carried out safely and under controlled conditions without damaging the equipment's structure or the main building structure. Summary of the Invention

[0003] The purpose of this invention is to provide a method for the overall disassembly, assembly, and transportation of a high-power mixer, which can quickly and efficiently complete the disassembly and assembly of the equipment while ensuring safety and controllability during the disassembly and assembly process.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows: A method for disassembling, assembling, and transporting a high-power mixer includes the following steps: S1. Prepare the transfer platform: Construct a steel structure transfer platform using steel plates and H-beams on the outside of the building wall where the high-power mixer is installed, ensuring that the surface of the steel structure platform is level with the ground where the equipment is placed. S2. Weld two long H-beams horizontally between the steel structure platform and the equipment base; weld two short H-beams inside the equipment base, with the upper surface of the long H-beams flush with the upper surface of the equipment base and on the same axis. S3. Clean and remove parts, empty all residual material from the feeding belt and the inside of the strong mixer, and inspect and clean the residual material on the machine wall; first remove the precision instruments, then remove other accessories; S4. Use jacks to lift the main equipment until the unloading box is completely exposed above the ground, remove the soft connection at the bottom of the unloading box, and insert four steel wheels into the base of the high-strength mixer to move the tank vehicle in a straight direction. S5. Weld lifting lugs to the ends of the H-beams on both sides of the high-strength mixer base, and with the help of four 5-ton chain hoists, move the equipment body to the external steel structure transfer platform step by step along the two long H-beams. S6. Using a crane in conjunction with the four lifting points on the upper part of the main equipment, the high-power mixer is lifted onto the transport vehicle for transfer. S7. Next, the electrical control cabinet is placed into four steel wheels and moved straight to the external steel structure platform. A crane is then used to lift the complete set of electrical control cabinets onto the transport vehicle for transfer. S8. Replace the upgraded high-power mixer, and use a steel structure platform, transport tank and chain hoist to transfer the upgraded electrical control cabinet and main equipment to the preset position in the building. Then install dust removal pipes, feeding boxes, hydraulic connection pipes, electrical control cabinet and terminal box electrical lines, feeding chute and other accessories. Finally install precision instruments such as weighing sensors.

[0005] Furthermore, when using a chain hoist, it is essential to ensure synchronization: loosen the chain hoist on one side while tightening it on the other side, moving gradually and slowly.

[0006] Furthermore, when installing the upgraded high-powered mixer, four steel wheels are inserted under the high-powered mixer beforehand to align it directly under the transfer track and transport the tank vehicle. After reaching the installation position, jacks are used to remove the transport tank vehicle.

[0007] The beneficial effects of this invention are: The method of this invention decomposes the entire disassembly, assembly, and transfer operation of the high-power mixer into reasonable steps, ensuring maintenance quality and realizing the disassembly, assembly, and transfer of large heavy equipment in a simple and efficient manner. It is suitable for the transformation of the pellet mixing process in metallurgical mines, facilitates the optimization of maintenance procedures, and reduces the disassembly, assembly, and transfer operation period by more than 40% after implementation, with considerable social and economic benefits. Attached Figure Description

[0008] Figure 1 This is a front view of the transfer platform in the method of the present invention; Figure 2 This is a side view of the transfer platform in the method of the present invention; Figure 3 This is a top view of the transfer platform in the method of the present invention; Figure 4 This is a schematic diagram of the transfer process in the method of the present invention; Figure 5 This is a schematic diagram of the hoisting process in the method of the present invention.

[0009] In the diagram: 1. Transfer platform; 101. Foundation surface; 102. Lower frame; 103. Column; 104. Upper frame; 105. Upper surface steel plate; 106. Track; 107. Frame tie rod; 108. Tie rod steel plate; 2. High-strength mixer; 3. Steel structure base; 4. Crane. Detailed Implementation

[0010] The present invention will be further described below with reference to the embodiments and accompanying drawings: Example

[0011] Taking the disassembly, assembly, and transportation of the company's DW29 / 4C Ericsson high-power mixer as an example: The main equipment weighs 15.6 tons and has external dimensions of 5.55*3.3*3.6 meters (length*width*height). The net height excluding the feed inlet and the lower discharge door device is 2.8 meters. Accessories include a hydraulic station, two sets of power distribution cabinets, and an on-site control box. The equipment installation reference surface is about 4.3 meters above the outdoor ground level, and the upper space of the strong mixer is 1.5 meters.

[0012] First, prepare the transfer platform: use stone powder to level the external soil on the west side of the mixing room building, and compact it with heavy transport equipment. The leveling height is level with the drainage surface at the base of the wall. A steel structure transfer platform is constructed outside the building wall where the high-power mixer is installed, using steel plates and H-beams. Figure 1-3 As shown, the surface of the control steel structure transfer platform 1 is level with the ground where the equipment is placed; The process is as follows: ① Lay two 20mm steel plates (2.2*10m in size) along the north-south direction of the outer wall base of the west wall of the mixing room to form a 4.4*10m base surface 101; ② The lower frame is made of 102 steel, which uses H-beams (specifications HW250*250*9*14mm), with 2 beams of 7 meters each, 3 beams of 3.24 meters each, and 2 beams of 3.36 meters each, for a total of 30.44 meters, forming a grid-like structure. ③ Columns are made of 103 welded H-beams (specifications HW200*200*8*12mm), 6 columns of 3.82 meters each, totaling 22.92 meters; ④ The upper frame is made of 104 stainless steel, using H-beams (specifications HW200*200*8*12mm), with 2 beams of 7 meters each, 3 beams of 3.24 meters each, and 2 beams of 3.36 meters each, totaling 30.44 meters, forming a grid-like structure; ⑤ The upper surface is covered with 105 steel plate (10mm specification), 3.5*7m laid flat; ⑥ Track 106 uses H-beams (specifications HW300*300*10*15mm), 2 pieces of 6.5 meters each; 2 pieces of 1.2 meters each, totaling 15.4 meters; ⑦ The frame tie rods 107 use angle steel (specification 100*100*6), 4.788 meters 4 rods; 2.337 meters 4 rods; 2.279 meters 4 rods; 4.708 meters 2 rods; 2.293 meters 2 rods; 2.238 meters 2 rods, totaling 56.094 meters; ⑧ Tie steel plates 108 (16mm specification), 24 pieces of 0.32*0.32m; 6 pieces of 0.65*0.75m; The above process is completed through material preparation, cutting, assembly and welding. Next, the upper frame is hoisted and installed, the corner steel plates of the facade frame and connecting ties are welded, the upper steel plate is installed and temporary railings are made. The key control dimension is the height of the steel structure platform, and finally, it is ensured that the upper surface of its 10 mm steel plate is level with the ground after the tiles are removed.

[0013] like Figure 4 As shown, track 106 consists of two 6.5-meter-long 300*300 H-shaped steel sections, one end of which is welded to the steel structure transfer platform 1, and the other end is connected to the outside of the steel structure base 3 of the high-strength mixer 2; two 1.2-meter-long 300*300 H-shaped steel sections are welded to the inside of the steel structure base of the high-strength mixer; and the upper surface of the 6.5-meter 300*300 H-shaped steel section is flush with the upper surface of the base and on the same axis; Next, clean and dismantle the accessories, empty the feeding belt and the internal residual material of the strong mixer, and inspect and clean the residual material on the machine wall; first remove the precision instruments such as the weighing sensor, and then remove other accessories, including dust removal pipes, feeding box, hydraulic connection pipes, electrical control cabinet and terminal box electrical wiring, feeding chute, etc. Then, use jacks to lift the main equipment until the unloading box is completely exposed above the ground, remove the soft connection at the bottom of the unloading box, and insert four 0.06-meter-high 10t steel wheels into the base of the high-strength mixer to move the tank vehicle straight. Afterwards, lifting lugs are welded to the ends of the 250*250HH-shaped steel sections on both sides of the high-power mixer base. With the help of four 5-ton chain hoists, the equipment body is gradually moved to the external steel structure transfer platform along two 6.5-meter-long H-shaped steel sections. When using chain hoists, it is necessary to ensure synchronization. While loosening the chain hoist on one side, the chain hoist on the other side is tightened, and the movement is gradual and slow.

[0014] Then, as Figure 5 As shown, the heavy-duty mixer is lifted onto a transport vehicle for transfer using crane 4 in conjunction with the four lifting points on the upper part of the main equipment 2.

[0015] Next, the electrical control cabinet was placed inside four 0.06-meter-high 10-ton steel wheels and moved vertically to the external steel structure platform by a transport tank. A crane was then used to lift the complete set of electrical control cabinets onto a transport vehicle for transfer.

[0016] When installing the upgraded high-power mixer: First, a crane is used to lift the upgraded complete set of electrical control cabinets onto a steel structure transfer platform. The electrical control cabinets are then placed under four 0.06-meter-high 10-ton steel wheels and moved vertically to the power distribution room, where they are installed and fixed in place. Here, the appearance of the hydraulic station and electrical control cabinets, which are accessories of the high-power mixer, has changed. The civil engineering foundations of the hydraulic station and electrical control cabinets need to be demolished and reinstalled and fixed.

[0017] Then, using the four lifting points on the upper part of the main equipment, a crane is used to lift the new high-strength mixer onto the steel structure platform; Next, using four 0.06-meter-high 10-ton steel wheels to move the tank in a straight direction and four 5-ton chain hoists to move the new high-strength mixer to the installation position, use jacks to lift the high-strength mixer, remove the tank, connect the soft connection at the bottom of the unloading box, remove the jacks, and the equipment is in place. Afterwards, install the dust removal pipes, feeding box, hydraulic connection pipes, electrical wiring of the electrical control cabinet and terminal box, feeding chute, and other accessories (the weighing sensor, being a precision instrument, is installed last). The internal structure and layout of the hydraulic station, electrical control cabinet, and terminal box of the high-power mixer have undergone significant changes. Additionally, a frequency converter and other equipment have been added to the electrical control cabinet. Two new temperature measurement points have been added to the high-power mixer's stirring motors. The cable routing and cable markings need to be verified against the changes in the old and new drawings. The labeling machine reprints the cable numbers and fixes them to the cable terminals. The cable routing is adjusted according to the changes, and the wires at the cable terminals are wired according to the newly marked terminal numbers.

[0018] Finally, the site was cleared, the steel structure was restored, the west wall and ground pipe manhole covers were restored, the lawn platform and unused chain hoists were restored, and the civil engineering restored the walls, ground pipe manhole covers, and lawn, etc.

[0019] This method utilizes 0.06-meter-high tank wheels in conjunction with 300H H-beams to move the mixer to the installation point, reducing its height so that it fits perfectly between the upper feed port connecting flange and the lower discharge gate device flexible connection. This solves the problem of insufficient overall height for disassembly and installation of the mixer, which prevents indoor hoisting. It also saves construction time and avoids the disassembly of components, thus completing the disassembly, assembly, and transportation of large heavy equipment quickly and efficiently.

Claims

1. A method for disassembling, transporting and reassembling a high-speed mixer, characterized in that: It comprises the following steps: S1, preparing a transfer platform: a steel structure transfer platform is built outside the building wall where the intensive mixer is installed, using steel plates and H-shaped steel, to control the surface of the steel structure platform to be level with the ground where the equipment is placed; S2, two long H-shaped steel are horizontally welded between the steel structure platform and the equipment base; two short H-shaped steel are welded inside the equipment base, the upper surface of the long H-shaped steel is level with the upper surface of the equipment base and on the same axis; S3, clean up and remove accessories, empty all the remaining materials in the feeding belt and the intensive mixer, and check and clean the remaining materials in the wall; first remove the precision instruments, then remove other accessories; S4, use a jack to lift the main equipment to completely expose the ground, remove the lower soft connection of the discharge box, and insert four steel wheel straight transport tanks on the intensive mixer base; S5, weld lifting lugs at the ends of the H-shaped steel on both sides of the intensive mixer base, cooperate with four 5-ton inverted chains, and gradually move the equipment body along the two long H-shaped steel to the external steel structure transfer platform; S6, use a crane to cooperate with the four lifting points on the main equipment to lift the intensive mixer onto the transport vehicle for transfer; S7, then insert the electric control cabinet into the four steel wheel straight transport tanks and move it to the external steel structure platform, use a crane to lift the complete electric control cabinet onto the transport vehicle for transfer; S8, after upgrading the intensive mixer, use the steel structure platform, transport tanks and inverted chains to transfer the upgraded electric control cabinet and equipment body to the preset position inside the building, then install the dust removal pipeline, discharge box, hydraulic connection pipe, electric control cabinet and terminal box electrical circuit, discharge chute and other accessories, and finally install the precision instruments.

2. The method of claim 1, wherein: Using inverted chains requires synchronization, one side loosens the inverted chain while the other side tightens the inverted chain, and moves slowly step by step.

3. The method of claim 1, wherein: When installing the upgraded intensive mixer, insert four steel wheel straight transport tanks under the intensive mixer aligned with the tracks of the transfer platform in advance when lifting and lowering the intensive mixer to the transfer platform, and then use a jack to remove the transport tanks after reaching the installation position.

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