Installation and construction method for rolling ring of large rotary calcining furnace

Abstract

The invention discloses an installation and construction method for a rolling ring of a large rotary calcining furnace, and belongs to the technical field of chemical equipment installation. The method mainly comprises the following steps: connecting a rolling ring mounting special board card tool with a rolling ring, connecting the rolling ring mounting special board card tool with a main hoisting steel wire rope, connecting a main hoisting point with a tail-slipping hoisting point, hoisting the rolling ring, sleeving the rolling ring on a furnace body, temporarily fixing a hoisting frame body on the furnace body, and connecting a base plate special clamp with the hoisting frame body. The mounting position of the base plate is adjusted; the height of the base plate is adjusted; the direction of the base plate is adjusted; the base plate is plugged; according to the construction method, in the installation process of the rolling ring and the base plate, the process is stable, alignment is easy, the installation difficulty of workers is reduced, the construction safety is guaranteed, the investment of hoisting machinery is reduced, a scaffold does not need to be erected, the construction occupied area is reduced, the construction period is shortened, and installation is faster, more convenient, safer and more economical.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical equipment installation, and in particular relates to a method for installing a roller ring of a large rotary calcining furnace. Background Art

[0002] The calcining furnace is the core equipment in the soda ash industrial production. The furnace body is supported on a roller support roller assembly via rollers, and the furnace body rotates under the action of the drive mechanism. Rollers are crucial components of large rotary calcining furnaces, playing an important role in ensuring smooth operation between the furnace body and the roller support roller assembly. Currently, solid rectangular rollers are primarily used. The main process flow for roller installation includes: inspecting and cleaning the furnace roller seat and rollers → positioning and laying out → roller assembly → gasket installation → gap adjustment and bolt tightening → testing and calibration → trial operation and acceptance. The roller assembly and gasket installation processes are the key and most difficult parts of calcining furnace installation.

[0003] After the furnace body and rollers arrive at the site, the furnace body is first unloaded onto a temporary arc-shaped support and placed for inspection, cleaning, positioning, and laying out. The roller surface and ovality are inspected, and then the roller assembly process begins. To ensure the roller precision and smooth installation, the lifting rigging used must be suitable for installation and easy to install and disassemble. After the rollers are assembled, in order to achieve close contact between the rollers and the calcining furnace body and form a tire ring with a uniform load along the circumference to ensure stable operation of the equipment, a pad is required to tighten the wedge-shaped rollers and the roller support. The current loose sleeve installation method, after years of practical summary, mainly adopts a single wedge plate and single-side bolt fastening installation method. This method has a simple structure and is easy to adjust. It can solve the problem of the roller moving along the axis of the furnace body. At the same time, it can ensure that the rollers are in full contact with the pads to provide sufficient friction, which is suitable for roller support of large-diameter rotary equipment. In order to ensure that the roller is installed smoothly and the wedge pad is tightened smoothly, the roller and the roller support are closely matched, the roller and the roller support roller device are closely matched, and the assembly is precise, it is necessary to use a suitable installation method to install the roller.

[0004] The current roller assembly process involves hoisting and fitting the roller onto the furnace roller support. The roller has a large diameter, is heavy, and has a wedge-shaped inner surface. During assembly, attention must be paid to roller deformation, the precision of the fit between the roller and the roller support, and an adjustable margin for smooth alignment. Existing roller assembly methods primarily utilize soft slings for lifting. While these slings allow for stable lifting without affecting the roller or its support, the wedge-shaped shape between the roller's inner surface and the furnace roller support makes it impossible to remove the slings after alignment, forcing them to be destroyed, increasing construction costs.

[0005] The current pad installation process involves adjusting the gap between the furnace body roller ring support and the roller ring after the roller ring is installed, and tightening the roller ring. Due to the wedge-shaped pad and the heavy weight of a single wedge-shaped pad, manual adjustment along the entire roller ring is difficult. Existing pad installation methods primarily rely on manual installation using scaffolding. During manual installation, two people lift the pad to the installation location, insert it into the groove, and then tighten it with a single bolt that combines a fastening bolt and a positioning bolt. However, the pad is smooth and has no force points during installation. If the pad is not properly fitted, it can easily slip and cause injury, and the gap is difficult to control. Furthermore, scaffolding erection and dismantling takes a long time, is expensive, and occupies a long construction site. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a method for installing and constructing a roller ring of a large rotary calcining furnace.

[0007] The present invention is achieved through the following technical solutions: A method for installing a roller ring of a large rotary calcining furnace comprises the following steps: The first step is to connect the rolling ring with the special board tool for installing the rolling ring: The special board tool for installing the rolling ring includes two brackets. Place the rolling ring horizontally on the work surface, and clamp the two brackets on both sides of a certain part of the rolling ring. Then connect and fix the two brackets with fastening bolts, and install a clamping ring at the butt joint of the two brackets.

[0008] Step 2: Connect the special plate and clamp tool for installing the rolling ring with the main hoisting wire rope: Connect the main hoisting wire rope with the clamp installed on the special plate and clamp tool for installing the rolling ring.

[0009] Step 3: Connect the main lifting point and the tail crane lifting point: Tie a sling at the other end of the roller ring, use two cranes to lift the roller ring, hang the hook of the main crane on the main lifting wire rope, and hang the hook of the tail crane on the sling.

[0010] Step 4: Hoisting the rolling ring: The main crane and the tail crane slowly lift the rolling ring horizontally to leave the ground. After that, the main crane slowly rises, and the tail crane maintains the height and slowly delivers it until the rolling ring is completely upright, and the hook and sling at the tail are removed.

[0011] Step 5. Fit the roller ring onto the furnace body: Use the main crane and the special plate and card tool for installing the roller ring to fit the roller ring onto the specified position of the furnace body, adjust and align it so that the deviation is less than 1mm, and then remove the special plate and card tool for installing the roller ring.

[0012] Step 6. Temporarily fix the lifting frame on the furnace body: The lifting frame includes columns, beams and electric hoists. The bottom end of the column is fixedly installed on the plane next to the roller installation position on the top surface of the furnace body. The beam is rotatably installed on the top of the column, and the electric hoist is slidably installed on the beam.

[0013] Step 7. Connect the special fixture for the pad and the lifting frame: The special fixture for the pad includes a vertical plate, with clamps installed on the upper and lower ends of the vertical plate respectively. A horizontal plate is vertically fixed on one side of the vertical plate, and a positioning plate is vertically fixed on the end of the horizontal plate. A fastening screw is threaded on the positioning plate. The electric hoist releases the lifting wire rope and connects it to one of the clamps.

[0014] Step 8. Connect the special fixture for the pad and the pad: make the vertical plate and the horizontal plate in the special fixture for the pad fit on the outer plate surface of the pad, fit the positioning plate on the side of the pad, screw the fastening screw into the positioning hole on the side of the positioning plate, and finally clamp the pad through the joint action of the vertical plate, horizontal plate, positioning plate and fastening screw.

[0015] Step 9. Adjust the installation position of the pad: By rotating the beam in the lifting frame and adjusting the sliding position of the electric hoist on the beam, move the pad to the installation position on both sides of the furnace body rolling ring.

[0016] Step 10. Adjust the height of the pad: By retracting and extending the lifting wire rope on the electric hoist, move the pad to any position from the top to the bottom of the roller installation.

[0017] Step 11. Adjust the position of the pad: The lifting wire rope on the electric hoist is connected to the clamps at different positions at the upper and lower ends of the pad special clamp, and the pad is installed on the positive and negative sides of the rolling ring groove respectively.

[0018] Step 12. Install the gasket: Use a special fixture for the gasket to install the gasket to the groove position of the rolling ring. The worker will insert the gasket into the groove along the rolling ring. After the gasket is installed, unscrew the fastening screw and remove the special fixture for the gasket. Use the same method to install all the gaskets one by one in a clockwise direction.

[0019] Step 13. Install the outer retaining ring and positioning bolts of the pad: After all the pads are installed, install the outer retaining ring and positioning bolts of the pad. Use the single wedge plate and single-side bolt fastening installation method to tighten the pads one by one. Use a dial indicator to check the circumference and radial and axial runout of the roller ring to ensure that the roller ring is in close contact with the roller ring seat of the furnace body.

[0020] Step 14: Install the entire furnace body: Remove the lifting frame from the furnace body, use a large crane to lift the furnace body and the roller ring to the grouted platform support device, use a caliper to check the position of the roller ring and the support device, and rotate and debug.

[0021] Furthermore, a special plate clamping tool for installing the rolling ring includes two clamping frames, two fastening bolts and two clamping rings, the clamping frame includes a vertically arranged fitting plate, and connecting holes are opened on both sides of the upper and lower sides of the fitting plate, and a horizontal connecting plate extending horizontally outward is fixed at the bottom end plate edge of the fitting plate, a vertical connecting plate extending vertically downward is fixed at the outer end plate edge of the horizontal connecting plate, and a clamping plate extending horizontally inward is fixed at the bottom end plate edge of the vertical connecting plate; the two clamping frames are respectively placed on both sides of the rolling ring, the fitting plates of the two clamping frames are facing and fitting, the horizontal connecting plate abuts the outer surface of the rolling ring, the vertical connecting plate abuts the side of the rolling ring, and the clamping plate abuts the inner surface of the rolling ring, the two fastening bolts are connected and fixed in the connecting holes on both sides of the lower part of the fitting plate, and the two clamping rings are connected in the connecting holes on both sides of the upper part of the fitting plate.

[0022] Furthermore, in the hoisting frame, a base is fixed to the bottom end of the column, and the base is fixed to the furnace body by bolts; an axle tube is fixed to the top end of the column, and a shaft sleeve is fixed to the middle position of the beam, and the shaft sleeve is rotatably mounted on the axle tube; the beam is an I-beam, and a pulley is installed on the upper part of the electric hoist, and the pulley is slidably installed in the slots on both sides of the beam.

[0023] Furthermore, in the special fixture for the pad, nuts are fixed on the upper and lower ends of the outer plate surface of the vertical plate, two retaining rings are connected to the two nuts respectively, the horizontal plate is vertically fixed in the middle position of one side of the vertical plate, the positioning plate is fixed on one side of the inner plate surface of the horizontal plate, and a screw barrel is fixed on the outer plate surface of the positioning plate, and the fastening screw is threadedly connected in the screw barrel and passes through the positioning plate.

[0024] Furthermore, in the fourth step, the main crane and the tail crane lift the roller ring horizontally to 200 mm from the ground.

[0025] Furthermore, in the thirteenth step, when the roller and the roller seat of the furnace body are in close contact, the contact area is greater than or equal to 80%, and the local gap is less than or equal to 0.1 mm.

[0026] Furthermore, a vertical plate is vertically fixed on the outer plate surface of the horizontal plate along the center line of the length direction of the horizontal plate, and a hanging hole is opened on the side of the vertical plate away from the horizontal plate.

[0027] The present invention is a safe, stable and economical large-scale rotary calcining furnace roller installation construction method specially designed for the installation of large-diameter and heavy rollers and large-weight, large-volume pads distributed along the roller circumference and with a wedge-shaped cross-section.

[0028] Currently, when installing the roller ring, due to its large diameter and weight, the traditional set method takes a long time to complete, and the rocking back and forth during the alignment and adjustment process creates significant installation difficulties and safety hazards. When installing the pad, due to the large weight of each pad, the large number of pads, and their distribution along the circumference of the roller ring, installation and removal are inconvenient. The pad is smooth during installation, and there are no stress points during installation. Installation by workers or with the assistance of a crane presents significant installation difficulties and safety hazards. Therefore, the present invention analyzes the structural characteristics of the roller ring installation and simulates the installation process to design the above-mentioned construction method, including the use of a special plate clamp tool for roller ring installation and a special clamp for the pad. Two special tools are used to install the roller ring and the pad, and a single wedge plate and single-sided bolt fastening method is used to adjust the pad, so that the roller ring and the pad, and the pad and the roller ring support perfectly match and do not loosen.

[0029] The construction method of the present invention is smooth and easy to align during the installation of the roller ring and the pad, which reduces the installation difficulty for workers, ensures the safety of construction, reduces the investment in lifting machinery and does not require the construction of scaffolding, reduces the construction area, shortens the construction period, and makes the installation faster, more convenient, safer and more economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings herein are used to provide further illustration of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0031] Figure 1 This is a front view of a special board tool for installing a roller ring in the present invention.

[0032] Figure 2 Front view of the card holder in the special card tool for installing the roller ring.

[0033] Figure 3 Right side view of the card holder in the special card tool for installing the roller ring.

[0034] Figure 4 The main view of the hoisting roller using the special plate card tool for roller installation.

[0035] Figure 5 Side view of the hoisting roller using the special plate card tool for roller installation.

[0036] Figure 6 This is a front view of the special clamp for the pad in the present invention.

[0037] Figure 7 It is a top view of the special clamp for the pad in the present invention.

[0038] Figure 8 This is the main view of the pad being clamped by a special clamp for the pad.

[0039] Figure 9This is a top view of the pad being clamped by a special clamp for the pad.

[0040] Figure 10 This is a schematic diagram of hoisting the pad using a hoisting frame and a special clamp for the pad.

[0041] Figure 11 It is a structural diagram of the positioning bolt fastening pad.

[0042] In the figure: 1 - special clamping tool for roller ring installation, 2 - clamping frame, 3 - fastening bolt, 4 - clamping ring, 5 - column, 6 - crossbeam, 7 - electric hoist, 8 - pulley, 9 - special clamp for pad, 10 - pad outer retaining ring, 11 - positioning bolt, 12 - roller, 13 - pad, 14 - furnace roller support, 15 - roller support roller device; 2-1- laminating plate, 2-2- connecting through hole, 2-3- horizontal connecting plate, 2-4- vertical connecting plate, 2-5- clamping plate; 9-1-vertical plate, 9-2-horizontal plate, 9-3-positioning plate, 9-4-fastening screw, 9-5-screw barrel, 9-6-vertical plate, 9-7-hanging hole, 9-8-nut. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the present invention, the present invention will be further clearly and completely described below in conjunction with the accompanying drawings and in conjunction with the examples. It should be noted that, unless there is a conflict, the features in the embodiments and examples in this application can be combined with each other. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0044] This embodiment takes the modular hoisting construction project of a boiler device as an example. There are a total of eight calcining furnaces, each of which is installed with two rollers 12. The outer diameter of the furnace body roller 12 is 5340 mm and weighs 25.2 tons. The inner diameter of the roller 12 is 4540-4560 mm and is wedge-shaped. The diameter of the furnace body roller support 14 is 4530 mm. The gap between the furnace body roller support 14 and the roller 12 is fastened with a pad 13. Each pad 13 is 400 mm long, 300 mm wide, 20-30 mm thick, wedge-shaped, and weighs 46.5 kg.

[0045] Regarding the installation of the above-mentioned roller ring 12 and the backing plate 13, this embodiment provides a large rotary calcining furnace roller ring installation construction method, such as Figures 1 to 10 As shown, the specific steps include: The first step is to connect the special plate clamp tool 1 for installing the rolling ring and the rolling ring 12: the special plate clamp tool 1 for installing the rolling ring includes two clamping frames 2. The rolling ring 12 is placed horizontally on the work surface, and the two clamping frames 2 are respectively clamped on both sides of a certain part of the rolling ring 12. Then the two clamping frames 2 are connected and fixed by fastening bolts 3, and a clamping ring 4 is installed at the joint of the two clamping frames 2.

[0046] Specifically, the special plate clamping tool 1 for installing the rolling ring includes two clamping frames 2, two fastening bolts 3 and two clamping rings 4. The clamping frame 2 includes a vertically arranged fitting plate 2-1. The upper and lower sides of the fitting plate 2-1 are both provided with connecting through holes 2-2. A horizontal connecting plate 2-3 extending horizontally outward is fixed at the bottom end plate edge of the fitting plate 2-1. A vertical connecting plate 2-4 extending vertically downward is fixed at the outer end plate edge of the horizontal connecting plate 2-3. The bottom end plate edge of the vertical connecting plate 2-4 is fixed with a A card plate 2-5 is extended horizontally inward; the two card frames 2 are respectively placed on both sides of the rolling ring 12, the fitting plates 2-1 of the two card frames 2 are facing and fittingly arranged, the horizontal connecting plate 2-3 abuts against the outer surface of the rolling ring 12, the vertical connecting plate 2-4 abuts against the side of the rolling ring 12, and the card plate 2-5 abuts against the inner surface of the rolling ring 12, two fastening bolts 3 are connected and fixed in the connecting through holes 2-2 on both sides of the lower part of the fitting plate 2-1, and two retaining rings 4 are connected in the connecting through holes 2-2 on both sides of the upper part of the fitting plate 2-1.

[0047] Step 2: Connect the special plate and card tool 1 for installing the rolling ring to the main hoisting wire rope: Connect the main hoisting wire rope to the clamping ring 4 installed on the special plate and card tool 1 for installing the rolling ring.

[0048] Step 3: Connect the main lifting point and the tail crane lifting point: Tie a sling at the other end of the roller ring 12, use two cranes to lift the roller ring 12, the hook of the main crane is hung on the main lifting wire rope 5, and the hook of the tail crane is hung on the sling.

[0049] Step 4: Lifting the rolling ring 12: The main crane and the tail crane slowly lift the rolling ring 12 horizontally to 200 mm from the ground. After that, the main crane slowly rises, and the tail crane maintains the height and slowly delivers it until the rolling ring 12 is completely upright, and the hook and sling at the tail are removed.

[0050] Step 5. Fit the roller ring 12 onto the furnace body: Use the main crane and the special plate and card tool 1 for installing the roller ring to fit the roller ring 12 onto the specified position of the furnace body, adjust and align it so that the deviation is less than 1mm, and then remove the special plate and card tool 1 for installing the roller ring.

[0051] Step 6. Temporarily fix the lifting frame on the furnace body: the lifting frame includes a column 5, a beam 6 and an electric hoist 7. The bottom end of the column 5 is temporarily fixed on the plane next to the installation position of the roller 12 on the top surface of the furnace body. The beam 6 is rotatably installed on the top of the column 5, and the electric hoist 7 is slidably installed on the beam 6.

[0052] Specifically, a base is fixed to the bottom end of the column 5, and bolt holes are respectively provided at the four corners of the base; four connecting seats are temporarily fixed on the furnace body, and bolt holes are provided on each connecting seat; the base is supported on the four connecting seats, and the base is connected and fixed to the four connecting seats by bolts, thereby realizing the temporary fixed installation of the column 5 and the furnace body; an axis tube is fixed to the top end of the column 5, and a shaft sleeve is fixed to the middle position of the crossbeam 6, and the shaft sleeve is rotatably sleeved on the axis tube; the crossbeam 6 adopts an I-beam, and a pulley 8 is installed on the upper part of the electric hoist. The pulley 8 is divided into two groups on the left and right, and the two groups of pulleys 8 are respectively slidably installed in the slots on both sides of the crossbeam 6.

[0053] Step 7. Connect the special fixture of the pad 13 and the lifting frame: The special fixture 9 for the pad includes a vertical plate 9-1, and the upper and lower ends of the vertical plate 9-1 are respectively installed with clamping rings 4. A horizontal plate 9-2 is vertically fixed to one side of the vertical plate 9-1, and a positioning plate 9-3 is vertically fixed to the end of the horizontal plate 9-2. A fastening screw 9-4 is threadedly connected to the positioning plate 9-3. The electric hoist 7 releases the lifting wire rope and connects it to one of the clamping rings 4.

[0054] Specifically, nuts 9-8 are fixed at the upper and lower ends of the outer plate surface of the vertical plate 9-1, and two retaining rings 4 are respectively connected to the two nuts 9-8. The horizontal plate 9-2 is vertically fixed in the middle position of one side of the vertical plate 9-1. The positioning plate 9-3 is fixed on one side of the inner plate surface of the horizontal plate 9-2. A screw barrel 9-5 is fixed on the outer plate surface of the positioning plate 9-3. The fastening screw 9-4 is threadedly connected in the screw barrel 9-5 and passes through the positioning plate 9-3. A vertical plate 9-6 is vertically fixed on the outer plate surface of the horizontal plate 9-2 along its length center line. A hanging hole 9-7 is provided on the side of the vertical plate 9-6 away from the horizontal plate 9-2. When it is necessary to install the pad 13 on one side of the rolling ring 12, the lifting wire of the electric hoist 7 can be connected to the clamping ring 4 at the upper end of the pad special clamp 9. At this time, under the action of the deadweight of the pad special clamp 9, the fastening bolts 3 on it are located on the outside of the side pad 13 and can be connected with the positioning holes on the outside of the pad 13, which is convenient for the installation of the side pad 13. When it is necessary to install the pad 13 on the other side of the rolling ring 12, the lifting wire of the electric hoist 7 can be connected to the clamping ring 4 at the lower end of the pad special clamp 9. At this time, the pad special clamp 9 is at its It will automatically flip 180° under the action of its own weight, and the fastening bolts 3 on it are located on the outside of the side pad 13 and can be connected to the positioning holes on the outside of the pad 13, which is convenient for the installation of the side pad 13; when it is necessary to install the pad 13 on the top or bottom of the rolling ring 12, the lifting wire of the electric hoist 7 can be connected to the lifting hole 9-7 on the vertical plate 9-6 of the special clamp 9 for the pad. At this time, the special clamp 9 for the pad will be basically horizontal, and the clamped pad 13 will also be basically horizontal, which facilitates the installation of the top and bottom pads 13.

[0055] Step 8. Connect the pad plate special fixture 9 and the pad plate 13: make the vertical plate 9-1 and the horizontal plate 9-2 in the pad plate special fixture 9 fit on the outer plate surface of the pad plate 13, the positioning plate 9-3 fit on the side of the pad plate 13, and the fastening screw 9-4 is screwed and inserted into the positioning hole on the side of the positioning plate 9-3. Finally, the pad plate 13 is fit and clamped by the joint action of the vertical plate 9-1, the horizontal plate 9-2, the positioning plate 9-3 and the fastening screw 9-4.

[0056] Step 9. Adjust the installation position of the pad 13: By rotating the crossbeam 6 in the hoisting frame and adjusting the sliding position of the electric hoist 7 on the crossbeam 6, the pad 13 is sent to the installation position on both sides of the furnace body rolling ring 12.

[0057] Step 10. Adjust the height of the pad 13: By retracting and releasing the hoisting wire rope on the electric hoist 7, the pad 13 is sent to any position from the top to the bottom of the roller ring 12 for installation.

[0058] Step 11. Adjust the position of the pad 13: The lifting wire rope on the electric hoist 7 is connected to the clamps 4 at different positions at the upper and lower ends of the pad special fixture 9, and the pad 13 is installed on the positive and negative sides of the groove of the rolling ring 12 respectively.

[0059] Step 12: Install the pad 13: Use the pad-specific clamp 9 to install the pad 13 to the groove position of the rolling ring 12. The worker inserts the pad 13 into the groove along the rolling ring 12. After the pad 13 is installed, unscrew the fastening screw 9-4 and remove the pad-specific clamp 9; use the same method to install all the pads 13 one by one in a clockwise direction.

[0060] Step 13: Install the outer retaining ring 10 and the positioning bolts 11 of the backing plate: After all the backing plates 13 are installed, install the outer retaining ring 10 and the positioning bolts 11 of the backing plate, as shown in the figure. Figure 11 As shown, the backing plates 13 are tightened one by one using a single wedge plate and single-side bolt fastening installation method, and a dial indicator is used to check the circumference and radial and axial runout of the roller 12, so that the roller 12 and the furnace roller support 14 are in close contact, with a contact area greater than or equal to 80% and a local gap less than or equal to 0.1 mm.

[0061] Step 14: Install the furnace as a whole: Remove the hoisting frame from the furnace body, use a large crane to hoist the furnace body together with the roller ring 12 to the grouting platform support device, use a caliper to check the position of the roller ring 12 and the support device, and rotate and debug.

[0062] The method of the present invention mainly includes two parts: the installation of the rolling ring 12 and the installation of the pad 13. When installing the rolling ring 12, a special plate clamping tool 1 for the rolling ring installation is mainly used, which can clamp the rolling ring 12 according to the structural characteristics of the rolling ring 12, facilitate the lifting of the rolling ring 12, and make the installation of the rolling ring 12 quick and accurate. When installing the pad 13, a lifting frame and a special clamp 9 for the pad are mainly used. The lifting frame is mainly composed of a column 5, a beam 6 and an electric hoist 7, which can realize the rotation adjustment and sliding adjustment of the lifting point, so as to meet the all-round and dead angle-free installation of the pad 13; the special clamp 9 for the pad is specially designed according to the structural characteristics of the pad 13, which can firmly clamp the pad 13 without affecting the installation operation of the pad 13. The special clamp 9 for the pad clamp clamps the pad 13 and then cooperates with the lifting frame. The lifting wire of the electric hoist 7 is connected to the special clamp 9 for the pad, which is convenient for installation. The electric hoist 7 is used to lift the pad 13 to the installation height. Not only is it less likely for the installation workers to get injured, but only one person is required to adjust the direction of the pad 13 during the installation process, and the pad 13 can be easily inserted into the groove. During the specific installation process of the pad 13, a plurality of lifting points are set on the pad clamp 9. The lifting wire of the electric hoist 7 is connected to the lifting points at different positions, so that the pad clamp 9 and the pad 13 can be flipped, thereby facilitating the installation of the pad 13 at different positions on the rolling ring 12 (such as the top and bottom positions of the rolling ring 12, and positions on both sides of the rolling ring 12). After the pad 13 is installed, the positioning bolts 11 with tightening and positioning functions are used to tighten the pad 13 and the pad outer retaining ring 10, adjust and align, check the coaxiality, radial runout and axial runout, and finally hoist the furnace body onto the platform support device, so that the rolling ring 12 and the rolling ring support roller device 15 fit perfectly.

[0063] The above-described embodiments merely represent the best modes of carrying out the present invention. While the descriptions thereof are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A method for installing a roller ring of a large rotary calcining furnace, characterized in that: The steps include: Step 1: Connect the roller ring with the special plate clamping tool: The special plate clamping tool for roller ring installation includes two clamping frames. Place the roller ring horizontally on the work surface, clamp the two clamping frames on both sides of a certain part of the roller ring, and then connect and fix the two clamping frames with fastening bolts. At the same time, install a clamping ring at the butt joint of the two clamping frames. Step 2: Connect the special plate and clamp tool for installing the roller ring with the main hoisting wire rope: Connect the main hoisting wire rope with the clamping ring installed on the special plate and clamp tool for installing the roller ring; Step 3: Connect the main lifting point and the tail crane lifting point: Tie a sling at the other end of the roller ring, use two cranes to lift the roller ring, hang the main crane's hook on the main lifting wire rope, and hang the tail crane's hook on the sling; Step 4: Hoisting the Rolling Ring: The main crane and the tail crane slowly lift the rolling ring horizontally until it leaves the ground. After that, the main crane slowly rises, and the tail crane maintains the height and slowly delivers it until the rolling ring is completely upright. The hook and sling at the tail are removed. Step 5. Fit the roller ring onto the furnace body: Use the main crane and the special plate and card tool for installing the roller ring to fit the roller ring onto the designated position of the furnace body, adjust and align it so that the deviation is less than 1mm, and then remove the special plate and card tool for installing the roller ring; Step 6. Temporarily fix the hoisting frame on the furnace body: The hoisting frame includes columns, beams and electric hoists. The bottom end of the column is fixedly installed on the plane next to the roller installation position on the top surface of the furnace body, the beam is rotatably installed on the top of the column, and the electric hoist is slidably installed on the beam; Step 7. Connect the special fixture for the pad and the lifting frame: The special fixture for the pad includes a vertical plate, with clamps installed at the upper and lower ends of the vertical plate. A horizontal plate is vertically fixed to one side of the vertical plate, and a positioning plate is vertically fixed to the end of the horizontal plate. A fastening screw is threaded on the positioning plate. The electric hoist releases the lifting wire rope and connects it to one of the clamps. Step 8. Connect the special fixture for the pad and the pad: fit the vertical plate and the horizontal plate in the special fixture for the pad onto the outer surface of the pad, fit the positioning plate onto the side surface of the pad, screw the fastening screw into the positioning hole on the side surface of the positioning plate, and finally, fit and clamp the pad through the joint action of the vertical plate, the horizontal plate, the positioning plate and the fastening screw; Step 9. Adjust the installation position of the pad: by rotating the crossbeam in the hoisting frame and adjusting the sliding position of the electric hoist on the crossbeam, move the pad to the installation position on both sides of the furnace body rolling ring; Step 10. Adjust the height of the pad: by retracting and extending the lifting wire rope on the electric hoist, move the pad to any position from the top to the bottom of the roller installation; Step 11. Adjust the position of the pad: Connect the lifting wire rope on the electric hoist through the clamps at different positions at the upper and lower ends of the pad special fixture, and install the pad on the positive and negative sides of the rolling ring groove respectively; Step 12: Install the pad: Use a special fixture for the pad to install the pad into the groove of the rolling ring. The worker inserts the pad into the groove along the rolling ring. After the pad is installed, unscrew the fastening screw and remove the special fixture for the pad. Use the same method to install all the pads one by one in a clockwise direction. Step 13. Install the outer retaining ring and positioning bolts of the pads: After all pads are installed, install the outer retaining ring and positioning bolts of the pads. Use the single wedge plate and single-side bolt fastening installation method to tighten the pads one by one. Use a dial indicator to check the circumference and radial and axial runout of the roller ring to ensure that the roller ring is in close contact with the roller ring seat of the furnace body. Step 14: Install the entire furnace body: Remove the lifting frame from the furnace body, use a large crane to lift the furnace body and the roller ring to the grouted platform support device, use a caliper to check the position of the roller ring and the support device, and rotate and debug.

2. The large rotary calcining furnace roller installation construction method according to claim 1 is characterized in that: The special plate clamping tool for installing the rolling ring includes two clamping frames, two fastening bolts and two clamping rings. The clamping frame includes a vertically arranged fitting plate, and connecting holes are opened on both sides of the upper and lower sides of the fitting plate. A horizontal connecting plate extending horizontally outward is fixed at the bottom end plate edge of the fitting plate, a vertical connecting plate extending vertically downward is fixed at the outer end plate edge of the horizontal connecting plate, and a clamping plate extending horizontally inward is fixed at the bottom end plate edge of the vertical connecting plate; the two clamping frames are respectively placed on both sides of the rolling ring, the fitting plates of the two clamping frames are facing and fitting, the horizontal connecting plate abuts the outer surface of the rolling ring, the vertical connecting plate abuts the side of the rolling ring, and the clamping plate abuts the inner surface of the rolling ring, the two fastening bolts are connected and fixed in the connecting holes on both sides of the lower part of the fitting plate, and the two clamping rings are connected in the connecting holes on both sides of the upper part of the fitting plate.

3. The method for installing and constructing a roller ring of a large rotary calcining furnace according to claim 1, characterized in that: In the lifting frame, a base is fixed to the bottom end of the column, and the base is fixed to the furnace body by bolts; an axle tube is fixed to the top of the column, and a shaft sleeve is fixed to the middle position of the beam, and the shaft sleeve is rotatably mounted on the axle tube; the beam is an I-beam, and a pulley is installed on the upper part of the electric hoist, and the pulley is slidably installed in the slots on both sides of the beam.

4. The method for installing a roller ring of a large rotary calcining furnace according to claim 1, characterized in that: In the special fixture for the pad, nuts are fixed on the upper and lower ends of the outer plate surface of the vertical plate, two retaining rings are connected to the two nuts respectively, the horizontal plate is vertically fixed in the middle position of one side of the vertical plate, the positioning plate is fixed on one side of the inner plate surface of the horizontal plate, and a screw barrel is fixed on the outer plate surface of the positioning plate. The fastening screw is threadedly connected in the screw barrel and passes through the positioning plate.

5. The method for installing a roller ring of a large rotary calcining furnace according to claim 1, characterized in that: In the fourth step, the main crane and the tail crane lift the roller ring horizontally to 200mm above the ground.

6. The method for installing a roller ring of a large rotary calcining furnace according to claim 1, characterized in that: In the thirteenth step, when the roller and the roller seat of the furnace body are in close contact, the contact area is greater than or equal to 80%, and the local gap is less than or equal to 0.1 mm.

7. The method for installing a roller ring of a large rotary calcining furnace according to claim 4, characterized in that: A vertical plate is vertically fixed on the outer plate surface of the horizontal plate along the center line of the length direction of the horizontal plate, and a hanging hole is opened on the side of the vertical plate away from the horizontal plate.

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