CN110541599A - Device for lifting inverted chimney steel inner cylinder by using steel twisted rope hydraulic pressure - Google Patents
Device for lifting inverted chimney steel inner cylinder by using steel twisted rope hydraulic pressure Download PDFInfo
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- CN110541599A CN110541599A CN201910813654.9A CN201910813654A CN110541599A CN 110541599 A CN110541599 A CN 110541599A CN 201910813654 A CN201910813654 A CN 201910813654A CN 110541599 A CN110541599 A CN 110541599A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 197
- 239000010959 steel Substances 0.000 title claims abstract description 197
- 230000007246 mechanism Effects 0.000 claims description 23
- 238000003466 welding Methods 0.000 claims description 19
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011473 acid brick Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
- E04H12/344—Arrangements for lifting tower sections for placing additional sections under them
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Abstract
The invention relates to the field of lifting and mounting of chimney steel inner cylinders with self-supporting structures or suspended structures, in particular to a device for hydraulically lifting and inversely mounting chimney steel inner cylinders by using steel stranded ropes. Hydraulic lifting device arranges steel inner tube top position in this construction, and whole promotion process heavy object focus all is less than the hoisting point, and consequently hoist and mount promotion process is steady, can guarantee construction quality again under the circumstances of guaranteeing safety, and the security equipment that has improved the construction can use repeatedly under the circumstances of normal maintenance and maintenance, has reduced engineering operation cost.
Description
Technical Field
The invention relates to the field of lifting and mounting of chimney steel inner cylinders with self-supporting structures or suspension structures, in particular to a device for hydraulically lifting and inversely mounting chimney steel inner cylinders by using steel stranded ropes.
Background
With the continuous development of the thermal power generation technology, the chimney with the acid-resistant brick anti-corrosion structure built on the inner side of the cylinder wall is gradually eliminated due to the complex structure, slow construction, large potential safety hazard and frequent follow-up quality problems, and a steel inner cylinder smoke exhaust channel formed by rolling weather-resistant steel plates is directly installed inside the chimney instead. However, the installed steel inner cylinder is of a vertical long and thin high-rise structure, the vertical height is about 120m to 240m, and the whole weight is often hundreds of tons, so that how to splice and lift the bulk steel winding drums in place becomes a great difficulty in installing the steel inner cylinder.
Disclosure of Invention
The technical scheme adopted by the invention for solving one of the technical problems is as follows: utilize steel strand wires hydraulic lifting face down device of chimney steel inner tube, including a fixed supporting platform who sets up in chimney top supporting platform is last to install the promotion support promote the support last symmetry respectively of promoting the support is equipped with a lifting unit, each the top of promoting the subassembly is fixed promote support upper and bottom with supporting platform relatively fixed connection, each promote the support and be used for driving each steel strand wires that link to each other rather than realize the up-and-down motion, promote the top fixed mounting of support and be used for realizing the guiding mechanism who transports the steel strand wires that come from the promotion subassembly, locking mechanism is used for realizing the locking location to each steel strand wires, and the lower extreme of each steel strand wires is connected with the welding lug on the steel inner tube that corresponds position department.
preferably, a plurality of locking pulling pieces which are arranged at intervals are sleeved outside the outer side of the tail end of the multi-strand steel stranded rope corresponding to each lifting assembly at intervals, and the locking pulling pieces are used for realizing auxiliary lifting and bearing of the whole steel inner cylinder assembly below the welding lifting lugs on the steel inner cylinders arranged at the corresponding positions.
Preferably, a position of the bottom of the supporting platform, which corresponds to a position right below each lifting assembly, is provided with a locking mechanism which works synchronously, and each locking mechanism is used for clamping and positioning each strand of steel stranded rope at the corresponding position.
Preferably, the locking pulling piece comprises two half-cone-shaped clamping pipes symmetrically clasped at the outer sides of the strands of steel strands of the lifting assembly at the corresponding positions, rectangular external threads are arranged on the outer side wall of a conical curved surface of each half-cone-shaped clamping pipe, a plurality of clamping conical blocks used for increasing friction coefficients are arranged on the inner side wall of each half-cone-shaped clamping pipe, and a conical spiral pipe is screwed on the outer side walls of the corresponding two half-cone-shaped clamping pipes through internal threads on an internal conical cavity of the conical spiral pipe to clamp the strands of steel strands at the inner ring of the conical spiral pipe.
Preferably, the locking mechanism comprises two vertical steel seats which are symmetrically arranged at the outer sides of the strands of steel stranded ropes at the corresponding positions respectively, the tops of the vertical steel seats are fixed at the bottom of the supporting platform respectively, two clamping cylinders which are synchronously and oppositely linked are fixedly installed on the inner side walls of the lower ends of the vertical steel seats respectively, and arc-shaped clamping seats with friction blocks on the inner side walls are installed at the end parts of piston rods of the clamping cylinders respectively.
Preferably, the lifting assembly comprises a GYT-200 type cable hydraulic lifting device fixed on the top of the lifting support, each strand of steel twisted rope penetrates through the whole body of the GYT-200 type cable hydraulic lifting device through a penetrating sleeve in the center, and the strand of steel twisted rope is clamped and loosened through a working anchor and a tool anchor at two end parts of the GYT-200 type cable hydraulic lifting device.
Preferably, the guide mechanism comprises a support bracket fixedly mounted on the lifting support, a guide pulley is movably mounted on the support bracket, two ends of the guide pulley are respectively movably inserted into the support bracket at corresponding positions through a central rotating shaft of the guide pulley, and the guide pulley is used for supporting and guiding out the stranded steel stranded rope lifted by the lifting assembly.
The invention has the beneficial effects that: in the construction, the hydraulic lifting device is arranged above the steel inner cylinder, and the gravity center of a heavy object is lower than a hanging point in the whole lifting process, so that the lifting process is stable, and the construction quality can be ensured under the condition of ensuring safety; the mode that each steel inner tube of adoption flip-chip in proper order, and upwards promote, the steel inner tube limit combination is promoted, nevertheless the combination welding work face is located all the time and is close to chimney bottom position, will upwards promote whole steel inner tube subassembly for the equipment of next steel inner tube provides ground space after not assembling and accomplishing a lesson steel inner tube, has reduced a large amount of high altitude construction, has improved the security equipment of construction and can use repeatedly under the circumstances of normal maintenance and maintenance, has reduced engineering operation cost.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.
Fig. 1 is a schematic diagram of the internal structure of the present invention (only the support platform and the chimney are shown in section).
Fig. 2 is a schematic structural diagram of the capture mechanism of the present invention.
Fig. 3 is a schematic cross-sectional view of the locking puller of the present invention.
In the figure, 1, a chimney; 2. A support platform; 3. lifting the support; 4. A steel strand; 5. A steel inner cylinder; 6. welding a lifting lug; 7. locking the lifting piece; 71. a semi-conical clamp pipe; 72. clamping the conical block; 73. a conical coil; 8. a locking mechanism; 81. erecting a steel base; 82. clamping the oil cylinder; 83. a friction block; 84. an arc-shaped clamping seat; 9. GYT-200 type steel cable type hydraulic lifting device; 10. a support bracket; 11. a guide pulley.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-3, the device for lifting and inverting a steel inner cylinder of a chimney by using a steel strand hydraulic lift comprises a supporting platform 2 fixedly arranged above the top of a chimney 1, a lifting support 3 is arranged on the supporting platform 2, lifting assemblies are symmetrically arranged on the lifting supports 3 respectively, the top of each lifting assembly is fixed on the lifting support 3, the bottom of each lifting assembly is fixedly connected with the supporting platform 2 relatively, each lifting support 3 is used for driving each steel strand 4 connected with the lifting support to move up and down, a guide mechanism for transferring the steel strand 4 from the lifting assembly is fixedly arranged on the top of the lifting support 3, a locking mechanism 8 is used for locking and positioning each steel strand 4, and the lower end of each steel strand 4 is connected with a welding lug 6 on the steel inner cylinder 5 at a corresponding position.
in the construction, the hydraulic lifting device is arranged above the steel inner cylinder 5, and the gravity center of a heavy object is lower than a hanging point in the whole lifting process, so that the lifting process is stable, and the construction quality can be ensured under the condition of ensuring safety; the mode that each steel inner cylinder 5 is inverted in sequence and is lifted upwards is adopted, the steel inner cylinders 5 are combined and lifted simultaneously, but the combined welding operation surface is always positioned at the position close to the bottom of the chimney 1, the whole steel inner cylinder 5 assembly is lifted upwards to provide a ground space for the next assembly of the steel inner cylinder 5 after the steel inner cylinder 5 is not assembled, a large amount of high-altitude operations are reduced, the safety equipment for construction can be repeatedly used under the conditions of normal maintenance and repair, and the engineering operation cost is reduced.
In the process of lifting upwards, controlling a hydraulic station arranged at the top of the supporting platform 2 and each oil way pipeline to connect each corresponding oil cylinder respectively; before lifting, controlling each part for clamping and holding tightly to be in a non-clamping state, so that resistance can not be generated to the up-and-down movement of the steel stranded rope, when lifting, controlling corresponding anchors at the end parts of the piston rods of the two GYT-200 type cable type hydraulic lifting devices 9 by an operator to clamp the steel stranded rope, and simultaneously, the piston rods extend upwards and synchronously run, so that the piston rods can be ensured to drive the steel stranded rope to lift upwards, and further, the inner port is driven to lift upwards; when the piston rod extends to the right position, the two clamping oil cylinders 82 of the locking mechanism 8 are controlled to clamp and position each strand of steel twisted rope, at the moment, the lower end of the steel inner cylinder 5 is lifted to a proper height, the steel inner cylinder 5 with the next connecting belt installed and welded is placed at the corresponding lower position through a trolley to implement welding and screwing connection, and after the welding is finished, the piston rods of the two GYT-200 type steel rope type hydraulic lifting devices 9 are controlled to return; and then, the whole steel inner cylinder 5 assembly is lifted and welded by repeating the steps.
Preferably, a plurality of locking pulling pieces 7 arranged at intervals are sleeved outside the outer side of the tail end of the multi-strand steel stranded rope 4 corresponding to each lifting assembly at intervals, and the locking pulling pieces 7 are used for realizing auxiliary lifting and bearing of the whole steel inner cylinder 5 assembly below the welding lifting lugs 6 on the steel inner cylinder 5 arranged at each corresponding position.
Through setting up the terminal clamp of a plurality of locking lifting pieces 7 can be controlled to the steel wire effectively to make a plurality of locking lifting pieces 7 press from both sides tight steel strand jointly, make each locking lifting piece 7 be used for placing the earhole lower part on steel inner tube 5, realize the bearing to whole steel inner tube 5. (ii) a The plurality of locking pulling pieces 7 are arranged, so that under the condition that one or more locking pulling pieces 7 are loosened, the rest locking pulling pieces 7 can still play a supporting role, and the slipping condition is reduced.
Preferably, a locking mechanism 8 which works synchronously is respectively arranged at the bottom of the supporting platform 2 at a position right below each lifting component, and each locking mechanism 8 is used for clamping and positioning each strand of steel stranded rope 4 at the corresponding position.
Preferably, the locking pulling member 7 includes two half-cone-shaped clamping pipes 71 symmetrically clasped at the outer sides of the strands of steel strands 4 of the lifting assembly at the corresponding positions, rectangular external threads are arranged on the outer side walls of the tapered curved surfaces of the half-cone-shaped clamping pipes 71, a plurality of clamping conical blocks 72 for increasing friction coefficients are arranged on the inner side walls of the half-cone-shaped clamping pipes 71, and a conical spiral pipe 73 is screwed on the outer side walls of the corresponding two half-cone-shaped clamping pipes 71 through internal threads on the inner conical cavity thereof to clamp the strands of steel strands 4 at the inner ring thereof.
The locking pulling piece 7 can be detached as required, the locking position of the locking pulling piece on the steel stranded rope can be conveniently adjusted, and the steel stranded rope can be clamped only by screwing the conical screw pipe 73 up and down when the locking pulling piece reaches or is loosened.
Preferably, the locking mechanism 8 includes two upright steel seats 81 symmetrically disposed at the outer sides of the strands of steel stranded ropes 4 at corresponding positions, the top of each upright steel seat 81 is fixed at the bottom of the supporting platform 2, a clamping cylinder 82 synchronously and oppositely linked is fixedly mounted on the inner side wall of the lower end of each upright steel seat 81, and an arc-shaped clamping seat 84 with a friction block 83 is mounted on the end of the piston rod of each clamping cylinder 82.
The arc-shaped clamping seats 84 can be driven by controlling the relative movement or the back-to-back movement of the two clamping oil cylinders 82, so that the steel strand rope is clamped and positioned, and the steel strand rope is effectively positioned by matching with the clamping action of the working anchor on the GYT-200 type steel cable type hydraulic lifting device 9, so that the downward slipping accident is prevented.
Preferably, the lifting assembly comprises a GYT-200 type steel cable hydraulic lifting device 9 fixed on the top of the lifting bracket 3, each strand of steel stranded rope 4 penetrates through the whole body of the GYT-200 type steel cable hydraulic lifting device 9 through a penetrating sleeve in the center, and each strand of steel stranded rope 4 realizes clamping and releasing of the strand of steel stranded rope 4 through a working anchor and a tool anchor at two end parts of the GYT-200 type steel cable hydraulic lifting device 9.
Preferably, the guide mechanism comprises a support bracket 10 fixedly mounted on the lifting bracket 3, a guide pulley 11 is movably mounted on the support bracket 10, two ends of the guide pulley 11 are respectively movably inserted into the support bracket 10 at corresponding positions through a central rotating shaft thereof, and the guide pulley 11 is used for supporting and guiding out the stranded steel stranded rope 4 lifted from the lifting assembly. The steel strand rope lifted up can be led out outwards through the guide pulley 11, and the operation is convenient and fast.
The specific construction process flow is as follows:
1. Construction technology (safety and environment) bottom crossing → 2. mounting and acceptance of a support platform and locking mechanisms → 3. preparation of lifting components → 4. mounting and acceptance of lifting components → 5. mounting and oil circuit connection of a hydraulic control station → hydraulic operation and synchronous control debugging → 6. mounting of steel inner cylinder wall hoisting points → 7. mounting of steel stranded ropes and locking pulling pieces → 8. hoisting and hoisting.
1. Construction (safety, environment) bottom-crossing:
Before construction, all management and operating personnel who participate in construction must be subjected to construction technology (safety and environment) bottom-crossing, the content of the bottom-crossing is comprehensive, the bottom-crossing process must be recorded, and the personnel who participate in the bottom-crossing sign the bottom-crossing record. And (4) the technology (safety and environment) for team personnel before construction.
2. The supporting platform and each locking mechanism are installed and checked:
The structural form of a supporting platform in this application is as follows, but not limited to this structural form:
The supporting platform is formed by connecting and combining a steel platform reinforced at 112.23m and 8 diagonal braces, and the hydraulic GYT-200 type steel cable type hydraulic lifting device is installed on the steel platform of 112.23 m. Because two hydraulic pressure GYT-200 type steel cable type hydraulic lifting devices are adopted for lifting, the load born by each hydraulic pressure GYT-200 type steel cable type hydraulic lifting device is about 70t, in consideration of safety, two supporting beams need to be added to the lower portion of each hydraulic lifting device, the type of each beam is HW400 multiplied by 13 multiplied by 21, 8I-shaped steel is adopted for platform reinforcement and is used as a reinforcement inclined strut of the platform, the type of the I-shaped steel is I25b, the 8 inclined struts are uniformly welded on the platform beam, the upper end is fixed on the top edge wall of the chimney, and the upper end and the lower end of the support must be fixed and firmly and reliably welded. The top of the chimney is made into a # -shaped frame by H steel, and fixed on the top of the chimney, the two ends of the frame are made into F-shaped clamps and clamped on the top edge wall of the chimney, four same H steels are vertically welded on a 112.23m platform stress main beam at the lower part, the # -shaped frame and the welding position of an upright post are found out according to the welding position of the platform welding upright post at the lower part, the upright post of the # -shaped frame adopts HW300 × 300 × 15 × 15 shaped steel, all welding parts must be welded firmly, the welding seam carries out surface quality acceptance and nondestructive detection according to the standard requirement, and the next step of installation can be carried out after the acceptance is.
3. Preparation of each lifting assembly:
The hydraulic lifting device is selected according to the actual weight of the steel inner cylinder, the selected hydraulic lifting device is composed of two hydraulic GYT-200 type cable hydraulic lifting devices, the maximum lifting capacity of each jack is 200t, and the requirements of lifting and related specifications are completely met.
4. Lifting component installation and acceptance inspection:
A lifting steel beam is arranged on a reinforced steel platform steel beam of 112.23m, a hydraulic GYT-200 type cable type hydraulic lifting device is arranged on the lifting steel beam, and a jack is placed stably so as to ensure that the deflection angle of a steel stranded rope is less than 0.5 degrees. In addition, the inverted cable frame is arranged at the top of the reinforced concrete outer cylinder and guides the lifted steel stranded rope to the outer side of the reinforced concrete outer cylinder. After the hydraulic GYT-200 type cable type hydraulic lifting device and the inverted cable frame are installed, professional personnel must check and accept the device to ensure that the device can be put into use after the device is positioned correctly and stably.
5. Installation and oil circuit connection of the hydraulic control station:
A hydraulic pump station is arranged on the 112.23m steel platform, and the lengths of high-pressure oil pipes between the pump station and each group of jacks are the same as much as possible so as to ensure the synchronization of lifting.
5.1 Hydraulic operation and synchronous control commissioning
5.1.1 after the hydraulic pump station and the oil circuit system are installed, the upper end of the steel stranded rope passes through a lifting hydraulic GYT-200 type cable hydraulic lifting device.
5.1.2 tensioning the steel stranded rope penetrating through the lifting jack by using a tensioning jack of 5Mpa to ensure that each steel stranded rope is in the same tensioning state before lifting so as to reduce the stretching deviation after the steel stranded rope bears and ensure that two groups of hydraulic GYT-200 type cable type hydraulic lifting devices are lifted synchronously.
And 5.1.3, opening the upper anchor and the lower anchor when lifting, so that the clamping piece is separated from the steel stranded rope, the steel stranded rope can smoothly pass through the lifting jack to be lifted, and otherwise, the steel stranded rope can be broken.
5.1.4 when the jack is lifted to a height of approximately 200mm, completing a stroke, retracting the jack, locking the upper safety anchor and the lower safety anchor at the moment, opening the lifting anchor, and ensuring that the steel stranded rope is safe and stable when the hydraulic GYT-200 type cable type hydraulic lifting device retracts.
5.1.5 in order to synchronize the two GYT-200 cable hydraulic lifting devices during the lifting process, the diameters of the high-pressure oil pipes are ensured to be the same, the lengths of the high-pressure oil pipes are ensured to be the same as much as possible, and meanwhile, the throttle valve is used for adjusting the oil mass to adjust the lifting speed of the GYT-200 cable hydraulic lifting devices.
5.1.6 when the jacks are not synchronous due to other reasons, the lifting error needs to be corrected by independent lifting of a single group of jacks.
6. Hanging point for installing steel inner cylinder wall
two equipment bracket type lifting lugs are welded on the chimney steel inner cylinder, and the positions of the lifting lugs correspond to the GYT-200 type cable type hydraulic lifting device so as to meet the requirement of a hydraulic lifting jack for fixing an anchor block structure. The selection of the lifting lug form and the rigidity of the steel inner cylinder at the mounting position must be subjected to mechanical accounting, and the mechanical requirements must be met.
7. Installing a steel stranded rope:
7.1 installing steel twisted rope
7.1.1 Steel strand selection calculation
The number of steel strands is calculated by the formula N = P ÷ P1:
In the formula, N is the number of the steel stranded ropes.
P-maximum lifting mass 140 t.
p1 allowable tension of steel twisted rope, kN
The steel strand adopts phi 15.24mm (1860 Mpa or 2000Mpa grade,) computational formula from "handbook for hoisting heavy equipment" (second edition), and each broken load 261kN of the phi 15.24mm steel strand calculates the allowable tension of each steel strand according to 4 times of safety factor as: p1=261 ÷ 4=65.25kN
From the above data, N = P ÷ P1 ═ 1400 ÷ 65.25=21.46 roots are obtained
Taking N =22 (each jack can be threaded with 15 steel twisted ropes, and the actual two jacks are respectively 15 multiplied by 2= 30.)
Actual safety factor: 30 × 261 ÷ 1400 ═ 5.59
Actual bearing of each steel strand: 1400 ÷ 30 ÷ 46.67kN
Therefore, 30 steel stranded ropes are safe to use.
7.1.2 installing steel twisted rope
The steel stranded rope passes through the jack and the lifting point, a shuttle wire coil is used during rope threading, and the left and right sides of the steel stranded rope are symmetrically arranged, so that the steel stranded rope is prevented from being twisted. When threading the steel strand, the front end of the steel strand is firmly clamped by the traction head so as to avoid falling off in the traction process. After the steel stranded rope is threaded, the threaded steel stranded rope on each lifting jack is pre-tightened one by a small jack before formal or each lifting so as to prevent the steel stranded rope from being broken due to uneven stress. The redundant part of the steel stranded rope must be cut off after pre-tightening or lifting to prevent hurting people; after the steel strand rope is installed, the outer sides of the tail ends of the multiple strands of steel strand ropes at the same positions are respectively and sequentially provided with the locking lifting pieces, and the steel strand ropes are tightly held.
8. Lifting hoist
8.1 at first weld two interim hoisting points on first section steel inner tube and send into inside the chimney with the dolly, adopt two hydraulic pressure GYT-200 type steel cable hydraulic lifting device to mention first section inner tube, push the butt joint with it of second section steel inner tube after, mention after the welding is accomplished, push the butt joint of third section again, every section length of steel inner tube is 1.5m, when hoist and mount 5 th section namely 7.5m in succession like this, continue to promote steel inner tube subassembly after and connect the sixth section and accomplish the welding, then carry out the bottom sprag with whole steel inner tube subassembly, dismantle each locking in proper order and carry the pulling piece and draw the steel strand downwards, then change the hoisting point to the sixth section, again the fastening installation locking is carried the pulling piece.
And 8.2 installing two groups of lifting hoisting points on the sixth section of steel inner cylinder, and then connecting the sixth section of steel inner cylinder with two hydraulic lifting jacks to carry out pairing and welding of upper and lower steel inner cylinder wall plates or cylinder sections. And the working steps are circulated in this way until the lifting of the last section of the steel inner cylinder is finished, and the lifting work is finished.
the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the technical solutions are all covered in the scope of the claims and the specification of the present invention; it will be apparent to those skilled in the art that any alternative modifications or variations to the embodiments of the present invention may be made within the scope of the present invention.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (7)
1. Utilize device of steel stranded conductor hydraulic lifting flip-chip chimney steel inner tube, its characterized in that: the chimney lifting device comprises a supporting platform fixedly arranged above the top of a chimney, wherein a lifting support is arranged on the supporting platform, lifting assemblies are symmetrically arranged on the lifting support respectively, the top of each lifting assembly is fixed on the lifting support, the bottom of each lifting assembly is fixedly connected with the supporting platform, each lifting support is used for driving each steel strand rope connected with the lifting support to move up and down, a guide mechanism used for transferring the steel strand ropes from the lifting assemblies is fixedly arranged at the top of the lifting support, a locking mechanism is used for locking and positioning each steel strand rope, and the lower end of each steel strand rope is connected with a welding lug on a steel inner cylinder corresponding to the position.
2. the device for hydraulically lifting and inverting the steel inner cylinder of the chimney by using the steel stranded rope according to claim 1, is characterized in that: and a plurality of locking pulling pieces which are arranged at intervals are sleeved outside the outer side of the tail end of the multi-strand steel stranded rope corresponding to each lifting assembly at intervals respectively, and the locking pulling pieces are used for realizing auxiliary lifting and bearing of the whole steel inner cylinder assembly below the welding lifting lugs on the steel inner cylinders at the corresponding positions.
3. The device for hydraulically lifting and inverting the steel inner cylinder of the chimney by using the steel stranded rope according to claim 1, is characterized in that: and the positions of the bottom of the supporting platform, which correspond to the positions right below the lifting assemblies, are respectively provided with a locking mechanism which works synchronously, and each locking mechanism is used for clamping and positioning each strand of steel stranded rope at the corresponding position.
4. The device for hydraulically lifting and inverting the steel inner cylinder of the chimney by using the steel stranded rope according to claim 2, is characterized in that: the locking pulling piece comprises two symmetrical semi-conical clamping pipes which are buckled at the outer sides of the strands of steel strands of the lifting assembly at the corresponding positions, rectangular external threads are arranged on the outer side wall of a conical curved surface of each semi-conical clamping pipe, a plurality of clamping conical blocks used for increasing friction coefficients are arranged on the inner side wall of each semi-conical clamping pipe, and a conical spiral pipe is screwed on the outer side walls of the corresponding two semi-conical clamping pipes through internal threads on an internal conical cavity of the conical spiral pipe to clamp the strands of steel strands at the inner ring of the conical spiral pipe.
5. The device for hydraulically lifting the steel inner cylinder of the inverted chimney by using the steel stranded rope according to claim 3, characterized in that: the locking mechanism comprises two vertical steel seats which are symmetrically arranged at the outer sides of the strands of steel stranded ropes at corresponding positions respectively, the top of each vertical steel seat is fixed at the bottom of the supporting platform respectively, two clamping oil cylinders which are synchronously and oppositely linked are fixedly arranged on the relative inner side walls of the lower ends of the vertical steel seats respectively, and arc-shaped clamping seats with friction blocks on the inner side walls are arranged at the end parts of piston rods of the clamping oil cylinders respectively.
6. The device for hydraulically lifting the steel inner cylinder of the inverted chimney by using the steel stranded rope according to claim 5, wherein the device comprises: the lifting assembly comprises a GYT-200 type steel cable type hydraulic lifting device, the top of the GYT-200 type steel cable type hydraulic lifting device is fixed on the lifting support, each strand of steel stranded rope penetrates through the whole GYT-200 type steel cable type hydraulic lifting device through a penetrating sleeve in the center, and the clamping and loosening of the strands of steel stranded ropes are achieved through working anchors and tool anchors at two end portions of the GYT-200 type steel cable type hydraulic lifting device.
7. the device for hydraulically lifting the steel inner cylinder of the inverted chimney by using the steel stranded rope according to claim 6, wherein the device comprises: the guide mechanism comprises a support bracket fixedly arranged on the lifting support, a guide pulley is movably arranged on the support bracket, two ends of the guide pulley are respectively movably inserted in the support bracket at the corresponding positions through a central rotating shaft, and the guide pulley is used for supporting and guiding out a plurality of strands of steel stranded ropes lifted by the lifting assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813654.9A CN110541599A (en) | 2019-08-30 | 2019-08-30 | Device for lifting inverted chimney steel inner cylinder by using steel twisted rope hydraulic pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813654.9A CN110541599A (en) | 2019-08-30 | 2019-08-30 | Device for lifting inverted chimney steel inner cylinder by using steel twisted rope hydraulic pressure |
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|---|---|
| CN110541599A true CN110541599A (en) | 2019-12-06 |
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|---|---|---|---|
| CN201910813654.9A Pending CN110541599A (en) | 2019-08-30 | 2019-08-30 | Device for lifting inverted chimney steel inner cylinder by using steel twisted rope hydraulic pressure |
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Cited By (2)
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| CN111980367A (en) * | 2020-08-31 | 2020-11-24 | 中国二十二冶集团有限公司 | Inverted construction method for elevator shaft |
| CN113882748A (en) * | 2021-11-22 | 2022-01-04 | 中国十九冶集团有限公司 | Lifting device for manufacturing and installing steel inner cylinder chimney |
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| CN113882748A (en) * | 2021-11-22 | 2022-01-04 | 中国十九冶集团有限公司 | Lifting device for manufacturing and installing steel inner cylinder chimney |
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