A double-layer revolving frame installation method

Abstract

The present invention relates to a method for installing a double-layer revolving frame. The double-layer revolving frame to be installed includes a plurality of fan-shaped upper frame segments and lower frame segments, and includes the following steps: installation preparation, assembly of the lower frame segments, installation of the centering guide rail plate and the pin gear frame, hoisting of the upper frame segments, assembly of the upper frame segments, and circumferential and radial constraints of the upper frame segments. The present invention adjusts the gap between the frames by setting a step gasket group between the frames to control the angle deviation value during the overall installation to meet the requirements; the upper frame segment load is effectively transferred to the lower frame segment by staggered placement of the upper frame segment and the lower frame segment; the radial positioning accuracy of the upper frame segment is adjusted by installing a radial adjustment device; and the adjusted upper frame segment is circumferentially and radially constrained by positioning blocks and stoppers. The present invention focuses on the circumferential and radial positioning of the double-layer revolving frame and the adjustment of the gap between the frames during the installation process, ensuring the circumferential and radial positioning accuracy of the double-layer revolving frame, and can effectively ensure the smooth operation of each component.

Description

Technical Field

[0001] The invention belongs to the technical field of annular furnace equipment, and in particular relates to a method for installing a double-layer revolving frame. Background Art

[0002] The ring furnace is used for sintering and cooling of ore materials. The revolving frame is the core revolving motion component of the ring furnace, which includes several fan-shaped upper frame segments and lower frame segments. The double-layer frame is supported on a ring track and revolves around a fixed revolving center in a horizontal plane. The revolving frame is difficult to form in one piece due to its large size. Therefore, it is usually necessary to split a complete circle into several fan-shaped frames with equal angles during design. There are holes on the upper and lower surfaces of the fan-shaped frame for installing support rails, side rails, drive units and other components.

[0003] From the above, it can be seen that the existing double-layer revolving frames are all decomposed into fan-shaped frames with equal angles for manufacturing and installation. However, during the on-site installation process, the fan-shaped frame has high circumferential positioning accuracy and small angle deviation, resulting in a large range of gap variations between adjacent segments. However, the current gasket specifications are single and the thickness is thin, which will cause the filling between the segments to be loose during installation, which can easily cause frame deformation. The upper frame in the revolving frame is a heat-bearing component, and the amount of heat deformation is large, so it has higher requirements for installation accuracy. In particular, if reliable fixed constraints are not taken after the radial and circumferential positioning adjustments are completed, the upper frame segments will deform disorderly when they expand due to heat, affecting the normal operation of the frame. The existing installation technology cannot solve the technical problems in the installation of double-layer frames. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a double-layer revolving frame installation method, which meets the gap adjustment requirements between the fan-shaped frames in the revolving frame and ensures the accuracy requirements of the revolving frame in the circumferential and radial positioning installation.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide a double-layer revolving frame installation method, the double-layer revolving frame to be installed includes a plurality of fan-shaped upper frame segments and lower frame segments, the cross-section of the lower frame segment is a trapezoid, including lower frame outer radial beams located on both sides, two lower frame middle radial beams located in the center, lower frame end beams located at both ends of the bottom side of the trapezoid, and lower frame inner ring beams and lower frame outer ring beams located at both ends of the top side of the trapezoid; the end face of the upper frame segment is a rectangle, including upper frame outer radial beams located on both sides, upper frame middle radial beams located in the center, and upper frame inner ring beams and upper frame outer ring beams located at both ends, characterized in that it includes the following steps:

[0006] S1. Preparation for installation: making several U-shaped step gasket sets, wherein the step gasket sets are composed of two U-shaped gaskets of the same thickness and several thin U-shaped gaskets sandwiched between the U-shaped gaskets. At least four levels of step gasket sets are prepared, and the number of thin U-shaped gaskets in each level of step gasket set increases successively;

[0007] S2. Assemble the lower frame segments, hoist the lower frame segments to the site, pre-tighten the webs of the lower frame outer radial beams of the adjacent lower frame segments through bolts, arrange the step gasket groups in sequence from thin to thick and from inner ring to outer ring to the bolted connections of the lower frame outer radial beams, increase or decrease the step gasket groups according to the gaps between the lower frame outer radial beams to adjust the angular deviation of each lower frame segment relative to the rotation center and make it less than 0.3°, and then tighten the bolts.

[0008] S3, install the centering guide plate and the pin gear frame, vertically install the centering guide plate on the web of the inner ring lower frame end beam, and vertically install the pin gear frame on the web of the outer ring lower frame end beam, adjust the out-of-roundness error of the centering guide plate and the pin gear frame to less than 3mm, and tighten the connection after the adjustment is completed;

[0009] S4, hoisting the upper frame segment, hoisting the upper frame segment above the lower frame segment, and placing the upper frame segment and the lower frame segment in an offset manner to ensure that the upper frame outer radial beam of the upper frame segment overlaps with the lower frame middle radial beam of the lower frame segment;

[0010] S5, radial adjustment of the upper frame segments, installing radial adjustment devices under the radial beam in the middle of the upper frame of the upper frame segments, so that they are respectively located on the radial inner side of the inner ring beam of the lower frame close to the rotation center and the radial outer side of the outer ring beam of the lower frame away from the rotation center, and adjusting the radial adjustment devices so that the out-of-roundness error of the upper frame segments is less than 3mm;

[0011] S6, assemble the upper frame segments for circumferential adjustment, pre-tighten the upper frame outer radial beams of adjacent upper frame segments by bolts, arrange the step gasket groups in order from thin to thick and from inner ring to outer ring to the bolt connection of the upper frame outer radial beams, increase or decrease the step gasket groups according to the gap between the upper frame outer radial beams to adjust the angular deviation of each upper frame segment relative to the rotation center and make it less than 0.3°;

[0012] S7. Circumferential and radial constraints on the upper frame segments. The upper frame segments are radially constrained by welding stops and radial positioning blocks between the upper frame segments and the lower frame segments. The upper frame segments are circumferentially constrained by welding circumferential positioning blocks between the upper frame segments and the lower frame segments. After the circumferential and radial constraints are completed, the step gasket set between the outer radial beams of the upper frame is removed.

[0013] The U-shaped pad has the same size as the thin U-shaped pad, the slot width of the U-shaped pad matches the frame connecting bolt, and the length matches the thickness of the corresponding longitudinal beam. The thickness of the thin U-shaped pad in the step gasket group is 1mm, 2mm, 3mm, and 4mm respectively.

[0014] The radial adjustment device consists of a bolt adjustment seat and an adjustment bolt. The bolt adjustment seat is fixed below the radial beam in the middle of the upper frame. The adjustment bolts are respectively tightened against the radial inner side of the inner ring beam of the lower frame and the radial outer side of the outer ring beam of the lower frame. Turning the adjustment bolts can cause radial displacement of the upper frame segments.

[0015] The stopper is a right-angled triangle stopper, which is welded at the junction of the middle radial beam of the lower frame and the outer side of the outer ring beam of the lower frame. The hypotenuse of the right-angled triangle matches the hypotenuse of one side of the trapezoidal middle radial beam of the lower frame in the lower frame segment. The radial positioning block is a rectangular block, which is welded to the lower end of the outer radial beam of the upper frame, and its position matches the position of the right-angled triangle stopper.

[0016] The circumferential positioning block is a rectangular block, welded to the upper surface of the outer ring beam of the lower frame and the inner ring beam of the lower frame, close to the two sides of the lower flange of the middle radial beam of the upper frame, and clamps the middle radial beam of the upper frame.

[0017] Beneficial Effects

[0018] The present invention provides a method for installing a double-layer revolving frame, which adjusts the gap between the frames by setting a stepped gasket group between the frames to control the angle deviation value during the overall installation to meet the requirements; controls the out-of-roundness of the inner centering guide plate and the outer pin gear frame to meet the requirements; effectively transfers the load of the upper frame segment to the lower frame segment by staggered placement of the upper frame segment and the lower frame segment, avoiding the influence of the center of gravity deviation on the accuracy; adjusts the radial positioning accuracy of the upper frame segment by installing a radial adjustment device, and adjusts the angle deviation value of each upper frame segment to meet the requirements; and performs circumferential and radial constraints on the adjusted upper frame segment by positioning blocks and stop blocks. The present invention focuses on the circumferential and radial positioning of the double-layer revolving frame and the gap adjustment between the frames during the installation process, ensuring the circumferential and radial positioning accuracy of the double-layer revolving frame, and can effectively ensure the smooth operation of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a double-layer revolving frame.

[0020] Figure 2 Schematic diagram of the circumferential clearance adjustment of the lower frame segments.

[0021] Figure 3Schematic diagram of radial adjustment of upper frame sections.

[0022] Figure 4 This is an enlarged schematic diagram of the radial and circumferential fixation of the upper frame segments.

[0023] Among them, 1-lower frame segment; 2-lower frame middle radial beam; 3-lower frame outer radial beam; 4-lower frame inner ring beam; 5-lower frame outer ring beam; 6-lower frame end beam; 7-step gasket group; 8-upper frame segment; 9-upper frame middle radial beam; 10-upper frame outer radial beam; 11-upper frame inner ring beam; 12-upper frame outer ring beam; 13-radial adjustment device; 14-circumferential positioning block; 15-stop block; 16-radial positioning block.

[0024] The same reference numerals in the various drawings represent the same components. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0026] The double-layer revolving frame to be installed includes several fan-shaped upper frame segments and lower frame segments. The cross-section of the lower frame segment is trapezoidal, including outer radial beams of the lower frame located on both sides, two middle radial beams of the lower frame located in the center, lower frame end beams located at both ends of the bottom edge of the trapezoid, and lower frame inner ring beams and lower frame outer ring beams located at both ends of the top edge of the trapezoid; the end face of the upper frame segment is rectangular, including outer radial beams of the upper frame located on both sides, middle radial beams of the upper frame located in the center, and inner ring beams of the upper frame and outer ring beams of the upper frame located at both ends.

[0027] In order to ensure that the double-layer revolving frame is installed in place with high circumferential and radial accuracy, the present invention provides a double-layer revolving frame installation method, comprising the following steps:

[0028] S1. Preparation for installation: making several U-shaped step gasket sets, wherein the step gasket sets are composed of two U-shaped gaskets of the same thickness and several thin U-shaped gaskets sandwiched between the U-shaped gaskets. At least four levels of step gasket sets are prepared, and the number of thin U-shaped gaskets in each level of step gasket set increases successively;

[0029] S2. Assemble the lower frame segments, hoist the lower frame segments to the site, pre-tighten the webs of the lower frame outer radial beams of the adjacent lower frame segments through bolts, arrange the step gasket groups in sequence from thin to thick and from inner ring to outer ring to the bolted connections of the lower frame outer radial beams, increase or decrease the step gasket groups according to the gaps between the lower frame outer radial beams to adjust the angular deviation of each lower frame segment relative to the rotation center and make it less than 0.3°, and then tighten the bolts.

[0030] S3, install the centering guide plate and the pin gear frame, vertically install the centering guide plate on the web of the inner ring lower frame end beam, and vertically install the pin gear frame on the web of the outer ring lower frame end beam, adjust the out-of-roundness error of the centering guide plate and the pin gear frame to less than 3mm, and tighten the connection after the adjustment is completed;

[0031] S4, hoisting the upper frame segment, hoisting the upper frame segment above the lower frame segment, and placing the upper frame segment and the lower frame segment in an offset manner to ensure that the upper frame outer radial beam of the upper frame segment overlaps with the lower frame middle radial beam of the lower frame segment;

[0032] S5, radial adjustment of the upper frame segments, installing radial adjustment devices under the radial beam in the middle of the upper frame of the upper frame segments, so that they are respectively located on the radial inner side of the inner ring beam of the lower frame close to the rotation center and the radial outer side of the outer ring beam of the lower frame away from the rotation center, and adjusting the radial adjustment devices so that the out-of-roundness error of the upper frame segments is less than 3mm;

[0033] S6, assemble the upper frame segments for circumferential adjustment, pre-tighten the upper frame outer radial beams of adjacent upper frame segments by bolts, arrange the step gasket groups in order from thin to thick and from inner ring to outer ring to the bolt connection of the upper frame outer radial beams, increase or decrease the step gasket groups according to the gap between the upper frame outer radial beams to adjust the angular deviation of each upper frame segment relative to the rotation center and make it less than 0.3°;

[0034] S7. Circumferential and radial constraints on the upper frame segments. The upper frame segments are radially constrained by welding stops and radial positioning blocks between the upper frame segments and the lower frame segments. The upper frame segments are circumferentially constrained by welding circumferential positioning blocks between the upper frame segments and the lower frame segments. After the circumferential and radial constraints are completed, the step gasket set between the outer radial beams of the upper frame is removed.

[0035] The U-shaped pad is the same size as the thin U-shaped pad, the notch width of the U-shaped pad matches the frame connection bolt, the length matches the thickness of the corresponding longitudinal beam, and the thickness of the thin U-shaped pad in the step gasket group is 1mm, 2mm, 3mm, and 4mm respectively. Since the frame gap has the characteristic of gradually increasing in a fan shape, the gap can be effectively filled by the gradually increasing step gasket group.

[0036] The radial adjustment device consists of a bolt adjustment seat and an adjustment bolt. The bolt adjustment seat is fixed below the radial beam in the middle of the upper frame. The adjustment bolts are respectively tightened against the radial inner side of the inner ring beam of the lower frame and the radial outer side of the outer ring beam of the lower frame. Turning the adjustment bolts can cause radial displacement of the upper frame segments.

[0037] The stopper is a right-angled triangle stopper, which is welded at the junction of the middle radial beam of the lower frame and the outer side of the outer ring beam of the lower frame. The hypotenuse of the right-angled triangle matches the hypotenuse of one side of the trapezoidal middle radial beam of the lower frame in the lower frame segment. The radial positioning block is a rectangular block, which is welded to the lower end of the outer radial beam of the upper frame, and its position matches the position of the right-angled triangle stopper.

[0038] The circumferential positioning block is a rectangular block, welded to the upper surface of the outer ring beam of the lower frame and the inner ring beam of the lower frame, and close to both sides of the lower flange of the middle radial beam of the upper frame to clamp and fix the middle radial beam of the upper frame.

Claims

1. A method for installing a double-layer revolving frame, wherein the double-layer revolving frame to be installed comprises a plurality of fan-shaped upper frame segments (8) and a lower frame segment (1), wherein the cross section of the lower frame segment (1) is a trapezoid, comprising lower frame outer radial beams (3) located on both sides, two lower frame middle radial beams (2) located in the center, lower frame end beams (6) located at both ends of the bottom side of the trapezoid, and lower frame inner ring beams (4) and lower frame outer ring beams (5) located at both ends of the top side of the trapezoid; the end face of the upper frame segment (8) is a rectangle, comprising upper frame outer radial beams (10) located on both sides, an upper frame middle radial beam (9) located in the center, and upper frame inner ring beams (11) and upper frame outer ring beams (12) located at both ends, It is characterized in that The following steps are involved: S1. Preparation for installation, manufacturing a plurality of U-shaped step gasket sets (7), wherein the step gasket sets (7) are composed of two U-shaped gaskets of the same thickness and a plurality of thin U-shaped gaskets sandwiched between the U-shaped gaskets, and at least four levels of step gasket sets (7) are prepared, wherein the number of thin U-shaped gaskets in each level of step gasket set (7) increases in sequence; S2, assembling the lower frame segments, hoisting the lower frame segments (1) to the site, connecting the webs of the lower frame outer radial beams (3) of the adjacent lower frame segments (1) together by bolts, arranging the step gasket groups (7) in order from thin to thick and from inner ring to outer ring at the bolt connection of the lower frame outer radial beams (3), increasing or decreasing the step gasket groups (7) according to the gap between the lower frame outer radial beams (3) to adjust the angular deviation of each lower frame segment (1) relative to the rotation center to be less than 0.3°, and then tightening the bolts; S3, installing the centering guide plate and the pin gear frame, vertically installing the centering guide plate on the web of the inner ring lower frame end beam (6), and vertically installing the pin gear frame on the web of the outer ring lower frame end beam (6), adjusting the out-of-roundness error of the centering guide plate and the pin gear frame to less than 3 mm, and tightening the connection after the adjustment is completed; S4, hoisting the upper frame segment, hoisting the upper frame segment (8) above the lower frame segment (1), and placing the upper frame segment (8) and the lower frame segment (1) in an offset manner, ensuring that the upper frame outer radial beam (10) of the upper frame segment and the lower frame middle radial beam (2) of the lower frame segment (1) overlap; S5, radial adjustment of the upper frame segment (8), installing a radial adjustment device (13) below the upper frame middle radial beam (9) of the upper frame segment (8), so that the radial adjustment device (13) is respectively located on the radial inner side of the lower frame inner ring beam (4) close to the rotation center and on the radial outer side of the lower frame outer ring beam (5) away from the rotation center, and adjusting the radial adjustment device (13) so that the out-of-roundness error of the upper frame segment (8) is less than 3 mm; S6, assembling the upper frame segments for circumferential adjustment, pre-tightening the upper frame outer radial beams (10) of adjacent upper frame segments (8) by bolts, arranging the step gasket groups (7) in order from thin to thick and from inner ring to outer ring to the bolt connection of the upper frame outer radial beams (10), increasing or decreasing the step gasket groups (7) according to the gap between the upper frame outer radial beams (10) to adjust the angular deviation of each upper frame segment (8) relative to the rotation center and make it less than 0.3°; S7, circumferential and radial constraints are imposed on the upper frame segment. The upper frame segment (8) is radially constrained by welding a stopper (15) and a radial positioning block (16) between the upper frame segment (8) and the lower frame segment (1). The upper frame segment (8) is circumferentially constrained by welding a circumferential positioning block (14) between the upper frame segment (8) and the lower frame segment (1). After the circumferential and radial constraints are completed, the step gasket group (7) between the outer radial beams (10) of the upper frame is removed.

2. A double-layer revolving frame installation method according to claim 1, It is characterized in that In S1, the U-shaped pad and the thin U-shaped pad have the same size, the width of the notch of the U-shaped pad matches the frame connection bolt, and the length matches the thickness of the corresponding longitudinal beam, and the thickness of the thin U-shaped pad in the step gasket group (7) is 1 mm, 2 mm, 3 mm, and 4 mm respectively.

3. A double-layer revolving frame installation method according to claim 1, It is characterized in that In S5, the radial adjustment device (13) is composed of a bolt adjustment seat and an adjustment bolt. The bolt adjustment seat is fixed below the radial beam (9) in the middle of the upper frame. The adjustment bolts are respectively pressed against the radial inner side of the inner ring beam (4) of the lower frame and the radial outer side of the outer ring beam (5) of the lower frame. Turning the adjustment bolts can cause the upper frame segment (8) to produce radial displacement.

4. A double-layer revolving frame installation method according to claim 1, It is characterized in that In S7, the stopper (15) is a right-angled triangle stopper, which is welded at the junction of the middle radial beam (2) of the lower frame and the outer side of the lower frame outer ring beam (5), and the hypotenuse of the right-angled triangle matches the hypotenuse of one side of the trapezoidal middle radial beam (2) of the lower frame in the lower frame segment (1), and the radial positioning block (16) is a rectangular block, which is welded to the lower end of the outer radial beam (10) of the upper frame, and the position matches the position of the right-angled triangle stopper.

5. A double-layer revolving frame installation method according to claim 1, It is characterized in that In S7, the circumferential positioning block (14) is a rectangular block, welded to the upper surface of the lower frame outer ring beam (5) and the lower frame inner ring beam (4), and closely attached to both sides of the lower flange of the upper frame middle radial beam (9), thereby clamping and fixing the upper frame middle radial beam (9).

Images