CN109488103B - Hydraulic lifting construction method for large all-steel structure intercooling tower - Google Patents
Hydraulic lifting construction method for large all-steel structure intercooling tower Download PDFInfo
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- CN109488103B CN109488103B CN201811323038.7A CN201811323038A CN109488103B CN 109488103 B CN109488103 B CN 109488103B CN 201811323038 A CN201811323038 A CN 201811323038A CN 109488103 B CN109488103 B CN 109488103B
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/163—Jacks specially adapted for working-up building elements
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Abstract
The invention relates to a hydraulic lifting construction method of a large-scale all-steel structure intercooling tower, which comprises the steps of steel structure cone section lifting construction, steel structure cylinder section lifting construction and reinforcing ring lifting construction, wherein a cone section tripod is installed on the ground, a plurality of layers of reinforcing rings are assembled and welded to complete the multi-layer lifting construction, then a hydraulic lifting mechanism is fixed, the multi-layer reinforcing rings are integrally lifted to the top of a cone section to be in place by the hydraulic lifting mechanism, a first layer of tripod of a straight cylinder section is installed with the cone section tripod and a first layer of reinforcing ring by a movable tower crane, then the rest reinforcing rings are integrally lifted to the top of the first layer of the straight cylinder section to be in place, and a second layer of the straight cylinder section is connected with the first layer of the straight cylinder section and the second layer of the reinforcing ring by the movable tower crane, the method is always installed on the top layer. And the improved process method is advanced, feasible, safe and reliable.
Description
Technical Field
The invention relates to a construction technology of a large all-steel structure intercooling tower, in particular to a hydraulic lifting construction method of the large all-steel structure intercooling tower.
Background
In a certain project, two intercooling towers in a steel structure form need to be built, and each intercooling tower consists of a lower cone section, an upper cylinder section and a reinforcing ring. Lower cone section, upper portion cylinder section and strengthening ring all adopt the tripod structure, and wherein, lower cone section and upper portion cylinder section still include metal backplate. The height of the indirect cooling tower is 175m, the diameter of the bottom of the indirect cooling tower is 150m, the diameter of the upper part of the indirect cooling tower is 102m, and the total weight of the indirect cooling tower in the form of a single steel structure is 8500 tons.
For the indirect cooling tower with the diameter less than 80m, the existing construction method, such as the Chinese invention patent with the application number of 201711082436.X, utilizes a tower crane for construction, and the construction of a temporary platform during construction is all aerial installation, so that the danger is high, the existing construction method utilizing the tower crane cannot be applied to the construction of the indirect cooling tower with the diameter more than 80m, and the indirect cooling tower with the steel structure with the diameter larger than 80m does not have a construction precedent in China, so that the construction method with high reliability and good safety performance is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a hydraulic lifting construction method for a large all-steel structure intercooling tower, which is suitable for an ultrahigh building with an oversized diameter, and has high reliability and good safety performance.
The invention discloses a hydraulic lifting construction method of a large-scale all-steel structure intercooling tower, which comprises intercooling tower steel structure cone section construction, intercooling tower steel structure multilayer reinforcing ring construction and intercooling tower steel structure cylinder section construction, wherein the intercooling tower steel structure cone section construction is carried out on the ground through a hoisting machine, the intercooling tower steel structure reinforcing ring construction is carried out through lifting of a hydraulic lifting mechanism, the intercooling tower steel structure cylinder section construction is carried out through hoisting of a movable tower crane, the intercooling tower steel structure cylinder section comprises a multilayer steel structure straight cylinder section, and the hydraulic lifting construction method comprises the following specific steps:
1) installing the conical section of the indirect cooling tower steel structure on the ground through a hoisting machine, and carrying out ground assembly and welding work on the straight cylinder section of the multilayer steel structure and the multilayer reinforcing ring;
2) arrange a plurality of hydraulic jack, hydraulic power unit, switch board in top layer beaded finish bottom according to the needs that promote weight to arrange corresponding hydraulic pressure oil pipe, arrange the master control cabinet on ground, debug equipment:
a. firstly, placing a hydraulic jack, a hydraulic pump station and a control cabinet, and connecting a hydraulic oil pipe, a control cable and a sensor;
b. the debugging equipment is used for observing whether the hydraulic jack acts as required or not by operating the touch screen of the main control cabinet;
c. taking down the hydraulic oil pipe, the control cable and the sensor;
d. installing a hydraulic jack: the hydraulic jack penetrates through the lower part of the lifting jack and is integrally fixed on the lifting member, wherein the lifting jack is a power mechanism fixed below the lifting member;
e. placing the main control cabinet at a proper position on the ground;
f. reconnecting the hydraulic oil pipe, the control cable and the sensor;
g. setting parameters to enable all hydraulic jacks to synchronously jack, and observing the change of displacement and pressure on a touch screen of the main control cabinet in real time;
3) a plurality of standard hydraulic lifting rods are arranged on the ground through a hoisting machine, and are matched with a hydraulic jack;
4) installing hydraulic lifting supports and hydraulic lifting heads corresponding to a plurality of hydraulic jacks through a crawler crane;
5) the continuous connection lifting rods are installed through a hoisting machine, two adjacent continuous connection lifting rods are connected through a pin shaft to form a continuous connection lifting rod group, and the upper end and the lower end of the continuous connection lifting rod group are respectively connected with a standard hydraulic lifting rod and a hydraulic lifting head through wedge plates;
6) hydraulic lifting operation, namely lifting the multilayer reinforcing rings to the top of the steel structure conical section integrally by a plurality of hydraulic jacks;
7) installing two movable tower cranes through a crawler crane, and installing a first layer of a steel structure straight cylinder section by using the two movable tower cranes;
8) hydraulic lifting operation, namely lifting the reinforcing ring to the top of the first layer of steel structure straight cylinder section integrally under the action of a plurality of hydraulic jacks;
9) installing a second layer of the steel structure straight cylinder section through a movable tower crane;
10) installing a lifting support, a plurality of lifting heads and a standard lifting rod through a movable tower crane;
11) hydraulic lifting operation, namely lifting the steel structure reinforcing ring to a first layer of in-place position, and mounting the first layer of reinforcing ring;
12) and (5) continuing hydraulic lifting operation, and installing the steel structure straight cylinder section to the top layer according to the method.
The invention relates to a hydraulic lifting construction method of a large all-steel structure intercooling tower, wherein a plurality of layers of reinforcing rings are used as a hydraulic lifting support platform and also used as an annular operating platform, the reinforcing rings are integrally combined and formed on the ground and integrally move along with a hydraulic lifting mechanism, two annular rails are arranged on the upper plane of the top reinforcing ring, and a movable tower crane is arranged on the annular rails.
The invention discloses a hydraulic lifting construction method of a large all-steel structure intercooling tower, wherein a plurality of hydraulic jacks are uniformly arranged on a reinforcing ring, each hydraulic jack is controlled by one hydraulic pump station, a sensor comprises a displacement sensor and a pressure sensor which are both arranged on the hydraulic jacks, the displacement sensor and the pressure sensor are used for feeding back signals to a PLC control system, and the PLC control system sends out instructions to the hydraulic pump stations according to the fed-back signals.
The invention relates to a hydraulic lifting construction method of a large all-steel structure intercooling tower, wherein a network type framework is adopted for a hydraulic lifting mechanism, each control cabinet controls a plurality of hydraulic jacks to lift, a main control console and each control station are in data connection through an industrial control network, a control system has remote and local two working modes, an automatic operating mode and a manual operating mode are provided in the remote mode, the automatic mode has a synchronization function, the local mode only has the manual operating mode, the system has overpressure monitoring and alarming functions, displacement difference monitoring and alarming functions, and the system automatically stops running while sending an alarm prompt.
The invention relates to a hydraulic lifting construction method of a large all-steel structure indirect cooling tower, which is characterized in that during synchronous hydraulic lifting, the displacement and the pressure are monitored simultaneously, a hydraulic pump station supplies oil to hydraulic jacks of all hydraulic lifting mechanisms, the pistons of the hydraulic jacks stretch out, a displacement sensor monitors the stretching amount of the piston of each hydraulic jack, when the height difference of a certain piston exceeds a required error value, a control system controls the action of an electromagnetic reversing valve of the hydraulic pump station, the action of the piston is stopped temporarily, and after the pistons of the jacks of other hydraulic lifters stretch out and follow up, the electromagnetic reversing valve is controlled to be opened, so that the piston which stops the action moves upwards again.
The hydraulic lifting construction method of the large-scale all-steel structure intercooling tower is different from the prior art in that the hydraulic lifting construction method of the large-scale all-steel structure intercooling tower takes the hydraulic jack as power, the hydraulic jack can be selected according to the weight of a lifting member and the lifting height, the type selection of the hydraulic jack can be 10-200 tons, the lifting height can be 10-500 m, and the lifting diameter can meet 10-300m, so that the hydraulic lifting construction method is suitable for the hydraulic lifting of the large-scale all-steel structure intercooling tower at with ultrahigh and ultra-long distance; the construction method comprises the steps of installing a cone section tripod on the ground, assembling and welding to complete a plurality of layers of reinforcing rings, arranging a fixed hydraulic lifting mechanism, integrally lifting the plurality of layers of reinforcing rings to the top of the cone section in place by using the hydraulic lifting mechanism, installing a straight cylinder section first layer tripod, the cone section tripod and the first layer of reinforcing rings by using a movable tower crane, then lifting the rest reinforcing rings to the top of the straight cylinder section first layer in place, and connecting a straight cylinder section second layer, the straight cylinder section first layer and the reinforcing ring second layer by using the movable tower crane.
The hydraulic lifting construction method of the large all-steel structure indirect cooling tower of the invention is further explained with reference to the attached drawings.
Drawings
FIG. 1 is a hydraulic lifting overall schematic diagram of a hydraulic lifting construction method of a large all-steel structure intercooling tower of the invention;
FIG. 2 is a schematic diagram of a hydraulic lifting mechanism adopted in the hydraulic lifting construction method of the large all-steel structure intercooling tower of the invention.
Detailed Description
Referring to fig. 1 and fig. 2, the construction method of the present invention is illustrated by taking an indirect cooling tower in a steel structure form with a height of 175m, a bottom diameter of 150m and an upper diameter of 102m as an example, wherein a conical section 101 of the indirect cooling tower steel structure is 55 m high, a straight cylinder section 102 of the indirect cooling tower steel structure is 55 m to 175m, reinforcing rings 103 of the indirect cooling tower steel structure are 5 layers, the 5 layers of reinforcing rings are distributed in the straight cylinder section at intervals of 30m, 5 layers of reinforcing ring steel structures, reinforcing ring connectors thereof and ring beam rails are arranged in the lifting section of the steel structure with a height of 0m to 55 m to be lifted, the weight of the auxiliary platform and 2 mobile tower cranes 104 is not included, the total weight of the lifting section with a height of 0m to 55 m is 1683.33 t, 25 lifting points are uniformly distributed at a position of 55 m, each lifting point is not less than 80 ton of lifting force, a rated total lifting amount of 2000 t, the lifting amount of 55 m to, the lifting weight is gradually decreased layer by layer after each layer of the reinforcing ring is installed in place, and the reinforcing ring is installed and fixed to the installation position. As the all-steel structural tower is ultrahigh in height, the hydraulic lifting construction of 0-175 m is a step-by-step multi-process construction.
The invention discloses a hydraulic lifting construction method of a large all-steel structure intercooling tower, which comprises the following specific steps of:
1) installing the conical section of the indirect cooling tower steel structure on the ground through a hoisting machine, and carrying out ground assembly and welding work on the straight cylinder section of the multilayer steel structure and the multilayer reinforcing ring;
2) arrange a plurality of hydraulic jack 2, hydraulic power unit, switch board according to the needs that promote weight in top layer beaded finish bottom to arrange corresponding hydraulic pressure oil pipe, arrange the master control cabinet on ground, debug equipment:
a. firstly, placing a hydraulic jack 2, a hydraulic pump station and a control cabinet, and connecting a hydraulic oil pipe, a control cable and a sensor;
b. the debugging equipment is used for observing whether the hydraulic jack 2 acts as required or not by operating the touch screen of the main control cabinet;
c. taking down the hydraulic oil pipe, the control cable and the sensor;
d. installing a hydraulic jack: the hydraulic jack 2 penetrates through the lower part of the lifting jack and then is integrally fixed on the lifting member 1, wherein the lifting jack is a power mechanism fixed below the lifting member 1;
e. placing the main control cabinet at a proper position on the ground;
f. reconnecting the hydraulic oil pipe, the control cable and the sensor;
g. setting parameters to enable all the hydraulic jacks 2 to synchronously jack, and observing the change of displacement and pressure on a touch screen of the main control cabinet in real time;
3) a plurality of standard hydraulic lifting rods 3 are installed on the ground through a hoisting machine, and the plurality of standard hydraulic lifting rods 3 are matched with the hydraulic jack 2;
4) installing hydraulic lifting supports 8 and hydraulic lifting heads 7 corresponding to a plurality of hydraulic jacks through a crawler crane;
5) the continuous connection lifting rods 5 are installed through a hoisting machine, the adjacent two continuous connection lifting rods 5 are connected through a pin shaft 6 to form a continuous connection lifting rod group, and the upper end and the lower end of the continuous connection lifting rod group are respectively connected with a standard hydraulic lifting rod 3 and a hydraulic lifting head 7 through a wedge plate 4 and a wedge plate 9;
6) hydraulic lifting operation, wherein a plurality of hydraulic jacks 2 integrally lift the multilayer reinforcing rings to the top of the steel structure conical section; at the moment, the multilayer reinforcing rings are sequentially distributed into a first layer reinforcing ring, a second layer reinforcing ring, a third layer reinforcing ring, a fourth layer reinforcing ring and a fifth layer reinforcing ring (top layer reinforcing ring) from bottom to top;
7) installing two movable tower cranes through a crawler crane, and installing a first layer of a steel structure straight cylinder section by using the two movable tower cranes;
8) hydraulic lifting operation, namely lifting the whole reinforcing ring to the top of the first layer of steel structure straight cylinder section under the action of a plurality of hydraulic jacks 2;
9) installing a second layer of the steel structure straight cylinder section through a movable tower crane 104;
10) installing a lifting support, a plurality of lifting heads and a standard lifting rod through a movable tower crane;
11) hydraulic lifting operation, namely lifting the steel structure reinforcing ring to a first layer of in-place position, and mounting the first layer of reinforcing ring; after the first layer of reinforcing rings are in place, the continuously lifted weight comprises a second layer, a third layer, a fourth layer and a fifth layer of reinforcing rings, and the lifted weight is reduced;
12) and (5) continuing hydraulic lifting operation, and installing the steel structure straight cylinder section to the top layer according to the method.
The installation of this embodiment is according to the order of steel construction cone section, first layer steel construction straight section, the straight section of second floor steel construction, first layer beaded finish, the straight section of third layer steel construction, the straight section of second floor beaded finish, the straight section of fourth layer steel construction, third layer beaded finish. The hydraulic lifting mechanism in the embodiment comprises a lifting component, a hydraulic jack, a standard hydraulic lifting rod, a wedge plate, a continuous lifting rod, a pin shaft, a hydraulic lifting head, a hydraulic lifting support and a fixing rod.
Wherein, multilayer strengthening ring is as hydraulic lifting supporting platform, also as annular operation platform, is provided with formal railing walkways, at the whole integrated combined moulding in ground, along with hydraulic lifting mechanism bulk movement, the upper plane of top layer strengthening ring (the fifth layer strengthening ring in this embodiment) is provided with twice circular orbit, and portable tower machine 104 sets up on circular orbit. In the invention, one to two movable tower cranes can be arranged, and the rated hoisting weight of the movable tower crane is 10 tons. The annular rail can not be dismantled after the indirect cooling tower is built, and is used for maintenance.
A plurality of hydraulic jack evenly arrange on the beaded finish, every hydraulic jack is controlled by a hydraulic power unit, and the sensor includes displacement sensor and pressure sensor, all installs on hydraulic jack, and displacement sensor and pressure sensor are used for feedback signal to give PLC control system, and PLC control system gives hydraulic power unit according to the signal send instruction of feedback.
Hydraulic lifting mechanism adopts network formula framework, a plurality of hydraulic jack of every switch board control promote, main control cabinet and each control station carry out data connection through the industrial control net, control system possesses long-range and two kinds of mode on the spot, there are automatic and two kinds of mode of operation manual under long-range mode, automatic mode possesses the synchronization function, only manual mode is under the mode on the spot, the system possesses superpressure monitoring and warning, the poor monitoring of displacement and alarming function, automatic shutdown when the system sends the warning suggestion moves.
When synchronous hydraulic lifting is carried out, displacement and pressure are monitored simultaneously, a hydraulic pump station supplies oil to all hydraulic jacks of a hydraulic lifting mechanism, pistons of the hydraulic jacks stretch out, a displacement sensor monitors the stretching amount of each piston of the hydraulic jacks, when the height difference of a certain piston exceeds a required error value, a control system controls the action of an electromagnetic reversing valve of the hydraulic pump station, the action of the piston is stopped temporarily, and after the pistons of the jacks of other hydraulic lifters stretch out and follow up, the electromagnetic reversing valve is controlled to be opened, so that the piston which stops the action moves upwards again.
The invention has the advantages that: the hydraulic jack is used as power, the hydraulic jack can be selected according to the requirements of the weight and the lifting height of a lifting component, the type selection of the hydraulic jack can be 10-200 tons, the lifting height can be 10-500 m, the lifting diameter can meet 10-300m, the standard lifting rod and the continuous lifting rod are used as a climbing channel, the standard lifting rod and the continuous lifting rod are replaced by utilizing spare cables in the lifting process, and finally the ultrahigh and ultra-long distance hydraulic lifting of the cooling tower between large-scale all-steel structures is completed.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (4)
1. A hydraulic lifting construction method for a large all-steel structure intercooling tower is characterized by comprising the following steps: including intercooling tower steel construction cone section construction, intercooling tower steel construction multilayer strengthening ring construction and intercooling tower steel construction cylinder section construction, wherein, intercooling tower steel construction cone section construction is gone on ground through hoisting machinery, and intercooling tower steel construction strengthening ring construction promotes through hydraulic lifting mechanism and goes on, and intercooling tower steel construction cylinder section construction is gone on through portable tower machine hoist and mount, and intercooling tower steel construction cylinder section includes the straight section of multilayer steel construction, and concrete step is as follows:
1) installing the conical section of the indirect cooling tower steel structure on the ground through a hoisting machine, and carrying out ground assembly and welding work on the straight cylinder section of the multilayer steel structure and the multilayer reinforcing ring;
2) arrange a plurality of hydraulic jack (2), hydraulic power unit, switch board in top layer beaded finish bottom according to the needs that promote weight to arrange corresponding hydraulic pressure oil pipe, arrange the master control cabinet on ground, debug equipment:
a. firstly, placing a hydraulic jack (2), a hydraulic pump station and a control cabinet, and connecting a hydraulic oil pipe, a control cable and a sensor;
b. the debugging equipment is used for observing whether the hydraulic jack (2) acts as required or not by operating the touch screen of the main control cabinet;
c. taking down the hydraulic oil pipe, the control cable and the sensor;
d. installing a hydraulic jack: the hydraulic jack (2) penetrates through the lower part of the lifting jack and then is integrally fixed on the lifting member (1), wherein the lifting jack is a power mechanism fixed below the lifting member (1);
e. placing the main control cabinet at a proper position on the ground;
f. reconnecting the hydraulic oil pipe, the control cable and the sensor;
g. setting parameters to enable all the hydraulic jacks (2) to synchronously jack, and observing the change of displacement and pressure on a touch screen of the main control cabinet in real time;
3) a plurality of standard hydraulic lifting rods (3) are installed on the ground through a hoisting machine, and the standard hydraulic lifting rods (3) are matched with the hydraulic jack (2);
4) installing hydraulic lifting supports (8) and hydraulic lifting heads (7) corresponding to the hydraulic jacks through a crawler crane;
5) continuous connection lifting rods (5) are installed through a hoisting machine, adjacent two continuous connection lifting rods (5) are connected through a pin shaft (6) to form a continuous connection lifting rod group, and the upper end and the lower end of the continuous connection lifting rod group are respectively connected with a standard hydraulic lifting rod (3) and a hydraulic lifting head (7) through a wedge plate;
6) hydraulic lifting operation, namely lifting the multilayer reinforcing ring to the top of the steel structure conical section integrally by a plurality of hydraulic jacks (2);
7) installing two movable tower cranes through a crawler crane, and installing a first layer of a steel structure straight cylinder section by using the two movable tower cranes;
8) hydraulic lifting operation, namely lifting the reinforcing ring to the top of the first layer of steel structure straight cylinder section integrally under the action of a plurality of hydraulic jacks;
9) installing a second layer of the steel structure straight cylinder section through a movable tower crane;
10) installing a lifting support, a plurality of lifting heads and a standard lifting rod through a movable tower crane;
11) hydraulic lifting operation, namely lifting the steel structure reinforcing ring to a first layer of in-place position, and mounting the first layer of reinforcing ring;
12) continuing hydraulic lifting operation, and installing the steel structure straight cylinder section to the top layer according to the method;
the multi-layer reinforcing ring is integrally combined and formed on the ground as a hydraulic lifting supporting platform and an operating platform, and integrally moves along with a hydraulic lifting mechanism, the upper plane of the top layer reinforcing ring is provided with two annular rails, and the movable tower crane is arranged on the annular rails.
2. The hydraulic lifting construction method of the large all-steel structure intercooling tower according to claim 1, characterized in that: a plurality of hydraulic jack evenly arranges on the beaded finish, and every hydraulic jack is controlled by a hydraulic power unit, the sensor includes displacement sensor and pressure sensor, all installs on hydraulic jack, displacement sensor and pressure sensor are used for feedback signal to give PLC control system, and PLC control system gives hydraulic power unit according to the signal send instruction of feedback.
3. The hydraulic lifting construction method of the large all-steel structure intercooling tower according to claim 1, characterized in that: hydraulic lifting mechanism adopts network formula framework, a plurality of hydraulic jack of every switch board control promote, main control cabinet and each control station carry out data connection through the industrial control net, control system possesses long-range and two kinds of mode on the spot, there are automatic and two kinds of mode of operation manual under long-range mode, automatic mode possesses the synchronization function, only manual mode is under the mode on the spot, the system possesses superpressure monitoring and warning, the poor monitoring of displacement and alarming function, automatic shutdown when the system sends the warning suggestion moves.
4. The hydraulic lifting construction method of the large all-steel structure intercooling tower according to claim 1, characterized in that: when synchronous hydraulic lifting is carried out, displacement and pressure are monitored simultaneously, a hydraulic pump station supplies oil to all hydraulic jacks of a hydraulic lifting mechanism, pistons of the hydraulic jacks stretch out, a displacement sensor monitors the stretching amount of each piston of the hydraulic jacks, when the height difference of a certain piston exceeds a required error value, a control system controls the action of an electromagnetic reversing valve of the hydraulic pump station, the action of the piston is stopped temporarily, and after the pistons of the jacks of other hydraulic lifters stretch out and follow up, the electromagnetic reversing valve is controlled to be opened, so that the piston which stops the action moves upwards again.
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| CN102235107B (en) * | 2010-04-27 | 2013-02-06 | 中国华冶科工集团有限公司 | Hydraulic lifting construction method for chimney steel inner cylinder |
| WO2012162800A1 (en) * | 2011-06-02 | 2012-12-06 | National Oilwell Varco, L.P. | Drilling rig system with self-elevating drill floor |
| US8584429B2 (en) * | 2011-09-30 | 2013-11-19 | Tindall Corporation | Tower erection system and method |
| US9140029B2 (en) * | 2012-01-20 | 2015-09-22 | Illinois Tool Works Inc. | Tower erecting system |
| ES2554828T3 (en) * | 2012-09-19 | 2015-12-23 | Alstom Technology Ltd. | Set and method of concentrated solar tower |
| CN106759883B (en) * | 2016-11-30 | 2019-05-24 | 上海市机械施工集团有限公司 | The tower crane construction method of large-scale steel structure air cooling tower |
| CN106759924A (en) * | 2017-01-20 | 2017-05-31 | 华电重工股份有限公司 | A kind of lifting installation method of steel structure cooling tower |
| CN107882339B (en) * | 2017-11-07 | 2019-12-31 | 中国化学工程第三建设有限公司 | Construction method of large all-steel structure type indirect cooling tower |
| CN108049694A (en) * | 2017-12-22 | 2018-05-18 | 陕西能源麟北发电有限公司 | Steel construction indirect cool tower with smoke discharging function |
| CN108086784A (en) * | 2017-12-25 | 2018-05-29 | 中国化学工程第三建设有限公司 | The construction method of steel construction indirect cool tower upper cylinder |
| CN207863437U (en) * | 2017-12-25 | 2018-09-14 | 中国化学工程第三建设有限公司 | Indirect cool tower direct tube section installation platform |
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