CN109488103A - Large-scale full steel structure indirect cool tower hydraulic pressure lift construction method - Google Patents

Large-scale full steel structure indirect cool tower hydraulic pressure lift construction method Download PDF

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Publication number
CN109488103A
CN109488103A CN201811323038.7A CN201811323038A CN109488103A CN 109488103 A CN109488103 A CN 109488103A CN 201811323038 A CN201811323038 A CN 201811323038A CN 109488103 A CN109488103 A CN 109488103A
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hydraulic
construction
reinforcing ring
layer
indirect cool
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CN109488103B (en
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王德
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China National Chemical Engineering Third Construction Co Ltd
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China National Chemical Engineering Third Construction Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/34Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • E04G21/16Tools or apparatus
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • E04G21/16Tools or apparatus
    • E04G21/163Jacks specially adapted for working-up building elements

Abstract

Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention, including steel construction cone segments lifting construction and steel-structured circular column body segment lifting construction and reinforcing ring lifting construction, cone segments tripod is installed on ground first, assembly welding completes multilayer reinforcing ring, then fixed hydraulic hoisting mechanism, multilayer reinforcing ring is integrally promoted to cone segments top in place using hydraulic lifting mechanism, direct tube section first layer tripod and cone segments tripod and first layer reinforcing ring are installed using mobile tower crane, it is whole in place to direct tube section first layer top subsequently to promote remaining reinforcing ring, the direct tube section second layer is connect with direct tube section first layer and the reinforcing ring second layer using mobile tower crane, the method is installed to always top layer, the lifting construction of super-high buildings is divided into the construction of multi-step multi-process by the present invention, it can be realized cold between large-scale full steel structure The hydraulic pressure lift of tower is constructed, and lifting process method is advanced feasible, safe and reliable.

Description

Large-scale full steel structure indirect cool tower hydraulic pressure lift construction method
Technical field
The present invention relates to large-scale full steel structure indirect cool tower construction technologies, in particular to be cold between a kind of large-scale full steel structure Tower hydraulic pressure lift construction method.
Background technique
Certain project needs to build the indirect cool tower of two steel structural forms, and the indirect cool tower is by lower part cone segments, upper cylinder section And reinforcing ring composition.Lower part cone segments, upper cylinder section and reinforcing ring are all made of tripod structure, wherein lower part cone segments It further include metal casing with upper cylinder section.Indirect cool tower high 175m, base diameter 150m, upper diameter 102m, separate unit steel knot 8500 tons of the indirect cool tower gross weight of configuration formula.
It is less than the indirect cool tower of 80m for diameter, existing construction method, such as application No. is the China of 201711082436.X Patent of invention is constructed using tower crane, and when construction builds temporary platform, is aerial installation, and risk is high, and existing utilizes tower The construction method hung cannot be applicable in the construction of indirect cool tower that diameter is more than 80m, between the so big steel structural form of diameter Cold tower has no construction precedent at home, therefore the construction method being badly in need of a kind of high reliablity, having a safety feature.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of large-scale full steel structure indirect cool tower hydraulic pressure lift construction method, Suitable for the super-high buildings with super-large diameter, high reliablity is had a safety feature.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention, including the construction of indirect cool tower steel construction cone segments, The construction of indirect cool tower steel construction multilayer reinforcing ring and the construction of indirect cool tower steel-structured circular column body segment, wherein indirect cool tower steel construction cone segments Construction is carried out by hoisting machinery on ground, and the construction of indirect cool tower steel construction reinforcing ring is promoted by hydraulic lifting mechanism to be carried out, Cold tower steel-structured circular column body segment construction is carried out by mobile tower crane lifting, and indirect cool tower steel-structured circular column body segment includes composite steel knot Structure direct tube section, the specific steps are as follows:
1) by hoisting machinery ground carry out indirect cool tower steel construction cone segments installation and multi-storey steel structure direct tube section and Ground assembling, the welding of multilayer reinforcing ring;
2) multiple hydraulic jacks, hydraulic power unit, control are arranged in top layer reinforcing ring bottom according to the needs of lifting weight Cabinet, and arrange corresponding hydraulic oil pipe, in ground configuration control cabinet, commissioning device:
A, hydraulic jack, hydraulic power unit, control cabinet, connection hydraulic oil pipe, controlling cable and sensor are first put;
B, commissioning device, by operating the touch screen of control cabinet, whether observation hydraulic jack acts as required;
C, hydraulic oil pipe, controlling cable and sensor are removed;
D, install hydraulic jack: hydraulic jack, which passes through, promotes top lower part, is then integrally attached in lifting member, In, promoting top is the power mechanism being fixed below lifting member;
E, control cabinet is put in ground suitable position;
F, hydraulic oil pipe, controlling cable and sensor are reconnected;
G, setup parameter makes all hydraulic jack synchronize jacking, observes position in real time on the touch screen of control cabinet Move the variation with pressure;
3) the more hydraulic lift levers of standard, the more hydraulic lift levers of standard and hydraulic thousand are installed on ground by hoisting machinery Jin top is mating;
4) hydraulic pressure lift support corresponding with multiple hydraulic jacks and hydraulic pressure lift head are installed by crawler crane;
5) continued access lift lever is installed by hoisting machinery, connected using pin shaft between two neighboring continued access lift lever to be formed it is continuous Lift lever group is connect, is connect the upper and lower ends of continued access lift lever group with the hydraulic lift lever of standard, hydraulic pressure lift head respectively with wedge;
6) hydraulic pressure lift operation, multiple hydraulic jacks overall increase to multilayer reinforcing ring at the top of steel construction cone segments;
7) two mobile tower cranes are installed by crawler crane, and utilizes two mobile tower cranes installation steel construction direct tube sections the One layer;
8) reinforcing ring is overall increased to first layer steel construction direct tube section by hydraulic pressure lift operation, multiple hydraulic jack effects Top;
9) the steel construction direct tube section second layer is installed by mobile tower crane;
10) support, multiple poppets, standard upgrading bar are promoted by mobile tower crane installation;
11) hydraulic pressure lift operation is promoted to steel construction reinforcing ring first layer on-station position, installs first layer reinforcing ring;
12) continue hydraulic pressure lift operation, steel construction direct tube section is installed by the above process until top layer.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention, wherein multilayer reinforcing ring is as hydraulic pressure lift Support platform is also used as encircling operating deck, forms, moves integrally with hydraulic lifting mechanism, the top in ground entire combination The upper plane of layer reinforcing ring is provided with twice circular orbit, and the movable type tower crane is arranged on circular orbit.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention, wherein multiple hydraulic jacks, which are withstood on, to be added It is evenly arranged on strong ring, every hydraulic jack is controlled by a hydraulic power unit, and the sensor includes displacement sensor and pressure Force snesor is installed in hydraulic jack, and institute's displacement sensors and pressure sensor are controlled for feedback signal to PLC System, PLC control system issue instructions to hydraulic power unit according to the signal of feedback.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention, wherein the hydraulic lifting mechanism uses net Network formula framework, each control cabinet control multiple hydraulic jacks and are promoted, and master station and each control station pass through industrial control network Data connection is carried out, control system has remotely with two kinds of operating modes on the spot, there are automatically and manually two kinds under remote mode Operation mode, automatic mode have synchronizing function, under with regard to ground mode only have manual operation mode, system possess superpressure monitoring with Alarm, displacement difference monitoring and warning function, system are automatically stopped operation while issuing warning note.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention is supervised simultaneously when synchronizing hydraulic pressure lift Displacement and pressure, hydraulic jack of the hydraulic power unit fuel feeding to all hydraulic hoisting mechanism, hydraulic jack piston stretching, position Displacement sensor monitors the overhang of every hydraulic jack piston, when some depth pistion difference is more than desired error amount, control The movement of the solenoid directional control valve of system control hydraulic power unit processed, which temporarily ceases, when the thousand of other hydraulic hoisting machines After the piston stretching of jin top is kept up with, then solenoid directional control valve opening is controlled, the piston for allowing stopping to act moves again up.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method difference from prior art of the invention is, of the invention Large-scale full steel structure indirect cool tower hydraulic pressure lift construction method, can be according to lifting member weight and promotion using hydraulic jack as power Height needs to select hydraulic jack, hydraulic jack type selecting can from 10 tons -200 tons, hoisting depth can from 10m-500m, 10-300m can be met by promoting diameter, suitable for large-scale full steel structure indirect cool tower superelevation, the hydraulic pressure lift of extra long distance;The present invention It is constructed using hydraulic lifting mechanism, including steel construction cone segments lifting construction and steel-structured circular column body segment lifting construction and reinforcing ring Lifting construction installs cone segments tripod on ground first, and assembly welding completes multilayer reinforcing ring, and fixed hydraulic is then arranged and mentions Mechanism is risen, is integrally promoted multilayer reinforcing ring to cone segments top in place using hydraulic lifting mechanism, it will using mobile tower crane Direct tube section first layer tripod and cone segments tripod and first layer reinforcing ring are installed, and it is whole subsequently to promote remaining reinforcing ring It is in place at the top of to direct tube section first layer, using mobile tower crane by the direct tube section second layer and direct tube section first layer and reinforcing ring second Layer connection, the method are installed to always top layer, and the lifting construction of super-high buildings is divided into multi-step multi-process and constructed by the present invention, Lifting process is safe and reliable.
Large-scale full steel structure indirect cool tower hydraulic pressure lift construction method of the invention is described further with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is large-scale full steel structure indirect cool tower hydraulic pressure lift construction method hydraulic pressure lift overall schematic of the invention;
Fig. 2 is hydraulic lifting mechanism employed in large-scale full steel structure indirect cool tower hydraulic pressure lift construction method of the invention Schematic diagram.
Specific embodiment
Referring to figs. 1 and 2, the present invention with high 175 meters, 150 meters of base diameter, 102 meters of upper diameter steel construction Illustrate construction method of the invention for the indirect cool tower of form, wherein high 55 meters of indirect cool tower steel construction cone segments 101, indirect cool tower Steel construction direct tube section 102 is located at 55-175 meters, and indirect cool tower steel construction reinforcing ring 103 is arranged 5 layers altogether, and 5 layers of reinforcing ring are distributed in directly Cylinder section, interval 30m arrangement, what 0-55 meter lift up of steel structure sections to be promoted be of five storeys reinforcing ring steel construction and its reinforcement ring connector, Ring beam track does not include the weight of adjunct platform and 2 mobile tower cranes 104,0-55 meters of raising section total weights total 1683.33 Ton, is uniformly arranged 25 hoist points at 55 meters, and each hoist point is not less than 80 ton force of lifting force, specified total lifting capacity 2000 Ton, 55 meters -175 meters are promoted using same procedure, 10.2 meters of each hoisting depth, and lifting weight is in place in every layer of reinforcing ring installation Successively successively decrease afterwards, reinforcing ring to installation site carries out installation fixation.Due to this full steel structure tower height degree superelevation, 0-175 meters hydraulic Lifting construction is the construction of multi-process step by step.
Large size full steel structure indirect cool tower hydraulic pressure lift construction method of the invention, the specific steps are as follows:
1) by hoisting machinery ground carry out indirect cool tower steel construction cone segments installation and multi-storey steel structure direct tube section and Ground assembling, the welding of multilayer reinforcing ring;
2) multiple hydraulic jacks 2, hydraulic power unit, control are arranged in top layer reinforcing ring bottom according to the needs of lifting weight Cabinet, and arrange corresponding hydraulic oil pipe, in ground configuration control cabinet, commissioning device:
A, hydraulic jack 2, hydraulic power unit, control cabinet, connection hydraulic oil pipe, controlling cable and sensor are first put;
B, commissioning device, by operating the touch screen of control cabinet, whether observation hydraulic jack 2 acts as required;
C, hydraulic oil pipe, controlling cable and sensor are removed;
D, install hydraulic jack: hydraulic jack 2, which passes through, promotes top lower part, is then integrally attached in lifting member 1, Wherein, promoting top is the power mechanism being fixed below lifting member 1;
E, control cabinet is put in ground suitable position;
F, hydraulic oil pipe, controlling cable and sensor are reconnected;
G, setup parameter makes all hydraulic jack 2 synchronize jacking, observes position in real time on the touch screen of control cabinet Move the variation with pressure;
3) the hydraulic lift lever 3 of more standards is installed on ground by hoisting machinery, the hydraulic lift lever 3 of more standards with it is hydraulic Jack 2 is mating;
4) hydraulic pressure lift support 8 corresponding with multiple hydraulic jacks and hydraulic pressure lift head 7 are installed by crawler crane;
5) continued access lift lever 5 is installed by hoisting machinery, uses pin shaft 6 to connect shape between two neighboring continued access lift lever 5 At continued access lift lever group, with wedge 4 and wedge 9 by the upper and lower ends of continued access lift lever group respectively with the hydraulic lift lever 3 of standard, liquid Poppet 7 is pressed to connect;
6) hydraulic pressure lift operation, multiple hydraulic jacks 2 overall increase to multilayer reinforcing ring at the top of steel construction cone segments; At this point, multilayer reinforcing ring is sequentially distributed from bottom to top as first layer reinforcing ring, second layer reinforcing ring, third layer reinforcing ring, the 4th Layer reinforcing ring, layer 5 reinforcing ring (top layer reinforcing ring);
7) two mobile tower cranes are installed by crawler crane, and utilizes two mobile tower cranes installation steel construction direct tube sections the One layer;
8) reinforcing ring is overall increased to first layer steel construction straight tube by hydraulic pressure lift operation, multiple effects of hydraulic jack 2 Section top;
9) the steel construction direct tube section second layer is installed by mobile tower crane 104;
10) support, multiple poppets, standard upgrading bar are promoted by mobile tower crane installation;
11) hydraulic pressure lift operation is promoted to steel construction reinforcing ring first layer on-station position, installs first layer reinforcing ring;The After one layer of reinforcing ring is in place, the weight continued to lift up includes second and third, four, five layers of reinforcing ring, the weight saving of promotion;
12) continue hydraulic pressure lift operation, steel construction direct tube section is installed by the above process until top layer.
The present embodiment is added by steel construction cone segments, first layer steel construction direct tube section, second layer steel construction direct tube section, first layer The sequence peace of Qiang Huan, third layer steel construction direct tube section, second layer reinforcing ring, the 4th layer of steel construction direct tube section, third layer reinforcing ring Dress.Hydraulic lifting mechanism in the present embodiment includes that lifting member, hydraulic jack, the hydraulic lift lever of standard, wedge, continued access mention Rising stem, pin shaft, hydraulic pressure lift head, hydraulic pressure lift support, fixed link.
Wherein, multilayer reinforcing ring is also used as encircling operating deck, is provided with formal railing as hydraulic pressure lift support platform Aisle forms in ground entire combination, moves integrally with hydraulic lifting mechanism, the top layer reinforcing ring (layer 5 in the present embodiment Reinforcing ring) upper plane be provided with twice circular orbit, mobile tower crane 104 is arranged on circular orbit.In the present invention, it can set One to two mobile tower cranes are set, the specified lifting weight of mobile tower crane is 10 tons.Indirect cool tower builds up rear circular orbit can not It removes, for overhauling.
Multiple hydraulic jacks withstand on reinforcing ring and are evenly arranged, and every hydraulic jack is controlled by a hydraulic power unit, pass Sensor includes displacement sensor and pressure sensor, is installed in hydraulic jack, and displacement sensor and pressure sensor are used In feedback signal to PLC control system, PLC control system issues instructions to hydraulic power unit according to the signal of feedback.
Hydraulic lifting mechanism uses network type framework, and each control cabinet controls multiple hydraulic jacks and promoted, master control Platform and each control station carry out data connection by industrial control network, control system have remotely with two kinds of operating modes on the spot, Have automatically and manually that two kinds of operation modes, automatic mode have synchronizing function under remote mode, it is only manual under with regard to ground mode Operation mode, system possess superpressure monitoring and alarm, displacement difference monitoring and warning function, system issue warning note while from It moves out of service.
When synchronizing hydraulic pressure lift, while displacement and pressure are monitored, hydraulic power unit fuel feeding gives all hydraulic elevator The hydraulic jack of structure, hydraulic jack piston stretch out, and displacement sensor monitors the overhang of every hydraulic jack piston, when When some depth pistion difference is more than desired error amount, control system controls the movement of the solenoid directional control valve of hydraulic power unit, the work Plug movement temporarily ceases, and after the jack piston stretching of other hydraulic hoisting machines is kept up with, then controls solenoid directional control valve opening, The piston for allowing stopping to act moves again up.
The invention has the advantages that using hydraulic jack as power, it can be according to the needs of lifting member weight and hoisting depth Hydraulic jack is selected, hydraulic jack type selecting can be from 10 tons -200 tons, and hoisting depth can be from 10m-500m, and promoting diameter can Meet 10-300m, by standard upgrading bar and continued access lift lever as climbing passageway, lifting process utilizes standby Suo Jinhang conversion to hold Power replacement standard upgrading bar and continued access lift lever is carried, is finally completed that large-scale full steel structure indirect cool tower superelevation, extra long distance is hydraulic mentions It rises.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.

Claims (5)

1. a kind of large size full steel structure indirect cool tower hydraulic pressure lift construction method, it is characterised in that: including indirect cool tower steel construction cone Section construction, the construction of indirect cool tower steel construction multilayer reinforcing ring and the construction of indirect cool tower steel-structured circular column body segment, wherein indirect cool tower steel construction Cone segments construction by hoisting machinery ground carry out, indirect cool tower steel construction reinforcing ring construction by hydraulic lifting mechanism promoted into Row, the construction of indirect cool tower steel-structured circular column body segment are carried out by mobile tower crane lifting, and indirect cool tower steel-structured circular column body segment includes more Layer steel construction direct tube section, the specific steps are as follows:
1) installation of indirect cool tower steel construction cone segments and multi-storey steel structure direct tube section and multilayer are carried out on ground by hoisting machinery Ground assembling, the welding of reinforcing ring;
2) multiple hydraulic jacks (2), hydraulic power unit, control are arranged in top layer reinforcing ring bottom according to the needs of lifting weight Cabinet, and arrange corresponding hydraulic oil pipe, in ground configuration control cabinet, commissioning device:
A, hydraulic jack (2), hydraulic power unit, control cabinet, connection hydraulic oil pipe, controlling cable and sensor are first put;
B, commissioning device, by operating the touch screen of control cabinet, whether observation hydraulic jack (2) acts as required;
C, hydraulic oil pipe, controlling cable and sensor are removed;
D, install hydraulic jack: hydraulic jack (2), which passes through, promotes top lower part, is then integrally attached on lifting member (1), Wherein, promoting top is to be fixed on the power mechanism of lifting member (1) below;
E, control cabinet is put in ground suitable position;
F, hydraulic oil pipe, controlling cable and sensor are reconnected;
G, setup parameter makes all hydraulic jack (2) synchronize jacking, the observation displacement in real time on the touch screen of control cabinet With the variation of pressure;
3) the more hydraulic lift levers of standard (3) are installed on ground by hoisting machinery, the more hydraulic lift levers of standard (3) with it is hydraulic Jack (2) is mating;
4) hydraulic pressure lift support (8) corresponding with multiple hydraulic jacks and hydraulic pressure lift head (7) are installed by crawler crane;
5) continued access lift lever (5) are installed by hoisting machinery, is connected between two neighboring continued access lift lever (5) using pin shaft (6) Form continued access lift lever group, with wedge by the upper and lower ends of continued access lift lever group respectively with the hydraulic lift lever of standard (3), hydraulic mention Lifting head (7) connection;
6) hydraulic pressure lift operation, multiple hydraulic jacks (2) overall increase to multilayer reinforcing ring at the top of steel construction cone segments;
7) two mobile tower cranes are installed by crawler crane, and steel construction direct tube section first is installed using two mobile tower cranes Layer;
8) reinforcing ring is overall increased to first layer steel construction direct tube section top by hydraulic pressure lift operation, multiple hydraulic jack effects Portion;
9) the steel construction direct tube section second layer is installed by mobile tower crane;
10) support, multiple poppets, standard upgrading bar are promoted by mobile tower crane installation;
11) hydraulic pressure lift operation is promoted to steel construction reinforcing ring first layer on-station position, installs first layer reinforcing ring;
12) continue hydraulic pressure lift operation, steel construction direct tube section is installed by the above process until top layer.
2. large size full steel structure indirect cool tower hydraulic pressure lift construction method according to claim 1, it is characterised in that: described more Layer reinforcing ring is also used as operating platform as hydraulic pressure lift support platform, forms in ground entire combination, with hydraulic lifting mechanism It moves integrally, the upper plane of the top layer reinforcing ring is provided with twice circular orbit, and the movable type tower crane is arranged in circular rails On road.
3. large size full steel structure indirect cool tower hydraulic pressure lift construction method according to claim 1, it is characterised in that: Duo Gesuo It states hydraulic jack and withstands on reinforcing ring and be evenly arranged, every hydraulic jack is controlled by a hydraulic power unit, the sensor packet Displacement sensor and pressure sensor are included, is installed in hydraulic jack, institute's displacement sensors and pressure sensor are used for Feedback signal issues instructions to hydraulic power unit according to the signal of feedback to PLC control system, PLC control system.
4. large size full steel structure indirect cool tower hydraulic pressure lift construction method according to claim 1, it is characterised in that: hydraulic to mention It rises mechanism and uses network type framework, each control cabinet controls multiple hydraulic jacks and promoted, and master station and each control station are logical It crosses industrial control network and carries out data connection, control system has remotely with two kinds of operating modes on the spot, has under remote mode certainly Dynamic and manual two kinds of operation modes, automatic mode have synchronizing function, there was only manual operation mode under with regard to ground mode, and system is gathered around There are superpressure monitoring and alarm, displacement difference monitoring and warning function, system are automatically stopped operation while issuing warning note.
5. large size full steel structure indirect cool tower hydraulic pressure lift construction method according to claim 1, it is characterised in that: carrying out When synchronous hydraulic lifting, while monitoring displacement and pressure, hydraulic power unit fuel feeding to all hydraulic hoisting mechanism hydraulic jack, Hydraulic jack piston stretches out, and displacement sensor monitors the overhang of every hydraulic jack piston, when some depth pistion is poor More than requirement error amount when, control system controls the movement of the solenoid directional control valve of hydraulic power unit, which temporarily ceases, After the jack piston stretching of other hydraulic hoisting machines is kept up with, then control solenoid directional control valve opening, the work for allowing stopping to act Plug moves again up.
CN201811323038.7A 2018-11-08 2018-11-08 Hydraulic lifting construction method for large all-steel structure intercooling tower Active CN109488103B (en)

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CN201811323038.7A CN109488103B (en) 2018-11-08 2018-11-08 Hydraulic lifting construction method for large all-steel structure intercooling tower

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Application Number Priority Date Filing Date Title
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