CN102235107B - Hydraulic lifting construction method for chimney steel inner cylinder - Google Patents

Hydraulic lifting construction method for chimney steel inner cylinder Download PDF

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Publication number
CN102235107B
CN102235107B CN 201010156024 CN201010156024A CN102235107B CN 102235107 B CN102235107 B CN 102235107B CN 201010156024 CN201010156024 CN 201010156024 CN 201010156024 A CN201010156024 A CN 201010156024A CN 102235107 B CN102235107 B CN 102235107B
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steel
cylinder
hydraulic
lifting
chimney
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CN102235107A (en
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刘乐平
郭建清
张连中
王文蕾
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China Huaye Group Co Ltd
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China Huaye Group Co Ltd
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Abstract

The invention provides a hydraulic lifting construction method for a chimney steel inner cylinder, comprising the following steps of: S100: mounting a steel cylinder base and then mounting a hydraulic lifting system on the steel cylinder base, wherein the hydraulic lifting system is used for lifting the chimney steel inner cylinder to be mounted and the steel cylinder base is used for supporting the chimney inner cylinder; S200: manufacturing and mounting a lifting platform; S300: prefabricating a steel plate into a plurality of standard sections with a certain size to be mounted on a machining field outside the chimney, sequentially mounting the standard sections of the steel inner cylinder from the top of the chimney from top to bottom section by section until all the steel inner cylinders are mounted, wherein the step of mounting the standard sections of the steel inner cylinder comprises the following specific steps of: S400: transferring the prefabricated standard sections of the steel inner cylinder to the lifting platform in the chimney by using hoisting equipment; S500: hoisting the standard sections of the steel inner cylinder in the step S400 to the position for mounting by using the hydraulic lifting system; and S600: abutting and assembling the standard sections of the steel inner cylinder at the position for mounting. The method has the advantages of safety, reliability, simple process, less investment and high efficiency.

Description

The hydraulic pressure lift job practices of inner steel cylinder of chimney
Technical field
The present invention relates to technical field of building construction, specifically, relate to a kind of hydraulic pressure lift job practices of inner steel cylinder of chimney.
Background technology
Current, along with environmental regulation is more and more stricter, the flue gas of particularly steam power station being arranged requires higher, recent years, the steam power station was for the most of mode that adopts wet process of FGD of environment protection standard, wet process of FGD is higher to the requirement for anticorrosion of smoke evacuation cylinder, acidresisting brick smoke evacuation chimney commonly used did not satisfy the needs of prior art in the past, and steel inner cylinder has been adopted in the present stage design of most of chimney.And steam power station single-machine capacity and total capacity constantly increased in recent years, so that the size of inner steel cylinder of chimney and weight also strengthen thereupon.Generally select monotubular or the bitubular (the 300MW unit adopts the single tube inner core, and 600MW and above unit adopt two-tube inner core) according to the size of unit installed capacity.For example the inner steel cylinder of chimney of 300MW unit is generally rolled by the thick steel plate of 14mm-20mm from top to bottom, usually highly surpasses 200m, diameter 6-7m.Add insulation and anti-corrosion material, the gross weight in place of steel inner cylinder can reach 600T greatly.Therefore, for the steel inner cylinder more than 90 meters, because it has superelevation, ultra-thin, overweight, build very difficult with traditional lifting formal dress job practices.
Although current employing pneumatic jacking inverted construction method construction technology is simpler than traditional lifting construction method, is easy to occur pressure air and reveals, thereby can cause the problems such as steel inner cylinder tenesmus, lifting platform and braced structures damage.
Summary of the invention
In order to solve existing the problems referred to above in the prior art, the invention provides a kind of hydraulic pressure lift job practices of inner steel cylinder of chimney, comprise: S100: the steel cylinder seat is installed, at the steel cylinder seat hydraulic lifting system is installed subsequently, described hydraulic lifting system is used for promoting inner steel cylinder of chimney to be installed, and described steel cylinder seat is used for supporting inner steel cylinder of chimney: S200: make and install lifting platform; S300: the processing space outside chimney is prefabricated into steel plate the standard paragraphs of a plurality of sizes to be installed; From the chimney top by order from top to bottom the steel inner cylinder standard paragraphs is installed section by section, until steel inner cylinder all installs; The step that the steel inner cylinder standard paragraphs is installed comprises: S400: utilize crane gear to have bad luck lifting platform in the chimney prefabricated steel inner cylinder standard paragraphs; S500: the steel inner cylinder standard paragraphs among the S400 is risen to position to be installed by hydraulic lifting system; S600: the steel inner cylinder standard paragraphs is docked and assembles in position to be installed.
Preferably, described hydraulic lifting system comprises hydraulic hoisting machine and hydraulic pressure lift oil way system, the hydraulic pressure lift oil way system comprises hydraulic power unit, hydraulic self-control valve, high-pressure oil pipe, oil tank and hydraulic joint original paper, described hydraulic hoisting machine hydraulic jack, hoisting frame, lifting arm and locking device up and down.
Preferably, be to drive hydraulic hoisting machine by hydraulic oil by hydraulic lifting system with the step that the steel inner cylinder standard paragraphs among the S400 rises to position to be installed, utilizing up and down, locking device rises to position to be installed with steel inner cylinder.
Preferably, described up and down locking device further comprises upper and lower dop, piston ring and door type card, by hydraulic lifting system the step that the steel inner cylinder standard paragraphs among the S400 rises to position to be installed is specially:
When the hydraulic jack oil-feed, thereby described upper chuck tightens and lifts lifting arm and piston ring drives upwards lifting of steel inner cylinder; When the hydraulic jack oil return, its upper chuck is with the piston rod backhaul, and this moment, its lower dop automatic clamping lifting arm can not glide, and jack so repeatedly moves lifting arm drive cylindrical shell is constantly risen, until position to be installed;
After described position installs the steel inner cylinder standard paragraphs, unclamp up and down dop, lifting arm and piston ring are dropped to the position to be installed lower part tension of next joint steel inner cylinder standard paragraphs of described installation site, carry out again the lifting of next joint steel inner cylinder standard paragraphs.
Utilize the hydraulic pressure lift job practices of inner steel cylinder of chimney, have advantages of that safe and reliable, technique is simple, investment is less and efficient is high.
In order to realize above-mentioned and relevant purpose, one or more aspects of the present invention comprise the feature that the back will describe in detail and particularly point out in the claims.Following explanation and accompanying drawing describe some illustrative aspects of the present invention in detail.Yet, the indication of these aspects only be some modes that can use in the variety of way of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Description of drawings
By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present invention and technological merit will become apparent and easily understand.
Fig. 1 shows the according to an embodiment of the invention flow chart of the hydraulic pressure lift job practices of inner steel cylinder of chimney;
Fig. 2 shows and utilizes according to the steel inner cylinder of the described method of the first embodiment of the present invention and the phantom drawing of hydraulic lifting system;
Fig. 3 shows the top view at the hoisting frame top of hydraulic lifting system shown in Figure 2;
Fig. 4 shows the schematic diagram of the connected mode of the door type card of steel inner cylinder shown in Figure 2 and hydraulic lifting system and piston ring; And
Fig. 5 shows the sectional view that intercepts along the A-A line of Fig. 4.
Specific embodiment
Below with reference to accompanying drawing specific embodiments of the invention are described in detail.
Fig. 1 illustration the flow chart of the hydraulic pressure lift job practices of inner steel cylinder of chimney according to an embodiment of the invention.Described method utilizes hydraulic lifting apparatus to realize the section by section combination installation of steel inner cylinder.
The below thinks that the chimney installation steel inner cylinder of 210m is described in more detail as example.The urceolus of chimney is reinforced concrete structure, bottom outer radius rice 10.9m, and steel concrete urceolus height is 202m, outlet outer radius 5.5m.The steel inner cylinder that to be designed with two diameters in the reinforced concrete tube be 3.050m, high 210m.As shown in Figure 1, described method step is as follows:
Step S100 installs the steel cylinder seat, in described steel cylinder seat hydraulic lifting system is installed subsequently, and described hydraulic lifting system is used for promoting steel inner cylinder to be installed, and described steel cylinder seat is used for supporting inner steel cylinder of chimney.
At first, the steel cylinder seat being installed comprises: carry out after the inspection of steel cylinder seat basis the high billet of steel 50mm being installed; 500 millimeters high bearing beams are installed; Mounting seat girder on bearing beam; Leveling levelling location; Secondary beam and welding are installed; Upper plane polishes; Base is mentioned the location; The leveling fastening bolt; Back-grouting; Mounting cylinder seat ring plate.The complete rear steel cylinder base of jacking keeps as permanent basis.
In the steel cylinder seat, hydraulic lifting system is installed subsequently.Hydraulic lifting system comprises hydraulic oil pipe system and hydraulic hoisting machine.Hydraulic oil pipe system comprises: hydraulic power unit 31, hydraulic self-control valve, high-pressure oil pipe 30, oil tank 32 and hydraulic joint original paper.Hydraulic hoisting machine comprises: hydraulic jack, hoisting frame 22, lifting arm 21 and locking device up and down.Locking device comprises upper chuck 23, lower dop 24, piston ring 2526 and door type card up and down.As shown in Figure 2, Fig. 2 shows and utilizes according to the steel inner cylinder of the described method of the first embodiment of the present invention and the phantom drawing of hydraulic lifting system.
After the system measuring and calculating, a cover hydraulic lifting system is installed in each steel inner cylinder in the steel cylinder seat, install 6 in each system from lock-step formula hydraulic jack.
Step S200 makes and installs lifting platform.Height and lifting weight according to chimney design, check lifting platform, and the height of the pre-set lifting platform that will install and quantity, are carried out setting-out, number material, cutting, proofreaied and correct the concrete manufactured size of platform according to drawing.Then by the constructure scheme organizing construction that determines, at 40m, 80m, 110m, 140m, the 170m absolute altitude place of chimney internal preset 5 layers of steel platform are installed respectively, one deck reinforced concrete platform is installed at 199.5m absolute altitude place.
Among the step S300, the processing space outside chimney is prefabricated into steel plate the standard paragraphs of a plurality of sizes to be installed, is used for installing steel inner cylinder.
In the present embodiment, select the JNS steel plate of anti-the sulphuric acid dew point to make steel inner cylinder.The diameter of inner steel cylinder of chimney is 3050mm, and the plate specification section is designed to every joint and highly is 2m, and every joint steel plate is made into two.Steel plate is at chimney external process utilization of area coiling machine roll-forming.Behind the every steel plate roll-forming, be the model inspection of 1500mm with arc length, the gap between model and the steel plate is not more than 2mm.
Then, by order from top to bottom each steel inner cylinder standard paragraphs is installed from the top of chimney, until steel inner cylinder all installs.
The steel inner cylinder standard paragraphs is installed to be comprised the steps.
Step 400: utilize crane gear to have bad luck lifting platform in the chimney prefabricated steel inner cylinder standard paragraphs.
Adopt 25 tons of mobile cranes that prefabricated steel plate is had bad luck in the concrete chimney, utilize the jack that is installed in the chimney urceolus to transport to the installation site of lifting platform.
Step S500: the steel inner cylinder standard paragraphs among the S400 is risen to position to be installed by hydraulic lifting system.
The lifting process of hydraulic lifting system is by the hydraulic oil pipe system autobalance and regulate pressure.With reference to Fig. 3, Fig. 3 shows the top view at the hoisting frame top of hydraulic lifting system shown in Figure 2.Stable effect when fixed hydraulic elevator and lifting arm 21 jacking are erected in the lifting of hydraulic hoisting machine mainly is welded to form by 2 H shaped steel, can not tilt the verticality when guaranteeing hydraulic hoisting machine work during 21 work of control lifting arm.The H section steel beam firm welding of hoisting frame 22 bottoms and steel cylinder seat, vertical support and level is set at the top between hoisting frame 22.In Fig. 3, the A place is the center of hoisting frame 22.
With reference to Fig. 2, when the hydraulic jack oil-feed, thereby by its upper chuck 23 chuckings and lift lifting arm 21 and piston ring 25 drives a joint steel inner cylinder standard paragraphs 10 and upwards promotes; When the jack oil return, its upper chuck 23 is with the piston rod backhaul, and its lower card of this moment, 24 automatic clamping lifting arms 21 can not glide, and jack so repeatedly moves lifting arm 21 drive steel inner cylinder standard paragraphs are constantly risen, until position to be installed.After this position installs the steel inner cylinder standard paragraphs, unclamp up and down dop 24, lifting arm 21 and piston ring 25 are dropped to the position to be installed lower part tension of next joint steel inner cylinder standard paragraphs of this installation site, promote again.
More particularly, the process by hydraulic pressure lift is that hydraulic jack promotes pulling lifting arm 21, lifting arm 21 pulling piston rings 25,10 risings of piston ring 25 drive steel inner cylinder standard paragraphs.Piston ring is simmered into identical with the radian of steel inner cylinder wall circle by channel-section steel, whole piston ring is divided into two, and the breach between two piston rings holds out against with the 10t jackscrew, guarantees that the channel-section steel piston ring contacts closely with the inwall of steel inner cylinder 10.Adopt the 16mm thickness steel plate to make stiffener, throat depth 6mm full weld, stiffener spacing 300mm in 25 channel-section steels.25 channel-section steel openings weld with the sealing of 14mm steel plate, throat depth 6mm weldering.The lifting arm 21 of hydraulic lifting apparatus respectively arranges 26 1 on a type card with tie point both sides, piston ring 25 bottom, door type card 26 adopt 14 millimeters thick steel plates make and with steel inner cylinder 10 firm welding.Referring to Fig. 4, Fig. 4 shows the schematic diagram of the connected mode of the door type card 26 of steel inner cylinder shown in Figure 2 10 and hydraulic lifting system and piston ring 25, and Fig. 5 shows the sectional view that intercepts along the A-A line of Fig. 4.
Step S600: the steel inner cylinder standard paragraphs is docked and assembles in position to be installed.
Carry out welding after the steel inner cylinder standard paragraphs is transported to position to be installed.Plate Welding adopts manual electric arc welding, and welding rod adopts acidproof dew point steel welding rod special for special J427CrCuSb welding rod.Welding current is 110-160A, 300-350 ℃/1.hr of welding rod drying temperature.Be placed on behind the welding rod drying in the on-the-spot incubator.The steel inner cylinder steel plate is beaten single groove, and side seam and facade groove angle are respectively 35 ° and 60 °, root face 2mm.The groove situation is seen Fig. 6.Carry out back chipping before the welding and process, weld with φ 4.0 welding rods after the φ 3.2 welding rod bottoming.Every welding must be cleaned out welding slag together, can carry out lower floor's welding.
Pass through above-mentioned steps, by order from top to bottom, after the standard paragraphs of steel inner cylinder risen to position to be installed, after the steel inner cylinder wall is filled a joint steel inner cylinder standard paragraphs, the welding of steel inner cylinder standard paragraphs is complete, again next steel inner cylinder standard paragraphs is risen to mounted next joint of steel inner cylinder standard paragraphs, fill, welding, so move in circles, accumulative total promotes until all the assembling of steel inner cylinder standard paragraphs is complete, thereby finishes the construction of whole steel inner cylinder.
, can find out by reference to the accompanying drawings to the detailed description of the embodiment of the invention by above: the hydraulic pressure lift job practices of steel inner cylinder of the present invention has adopted hydraulic lifting device the steel inner cylinder of chimney progressively to be risen to the inverted construction technique of position to be installed in the assembly welding process.For the construction of overweight inner steel cylinder of chimney, can eliminate the potential safety hazard of main installing component, guarantee installation safety, and construction process is more smooth and easy, more continuous, thereby has accelerated construction speed, saved construction cost.Go for the steel inner cylinder installation and maintenance of various support patterns.
Under above-mentioned instruction of the present invention; those skilled in the art can carry out various modifications and variations on the basis of above-described embodiment; and these improvement and modification; all drop in protection scope of the present invention; those skilled in the art should be understood that; above-mentioned specific descriptions are just better explained purpose of the present invention, and protection scope of the present invention is limited by claim and equivalent thereof.

Claims (1)

1. the hydraulic pressure lift job practices of an inner steel cylinder of chimney is characterized in that, may further comprise the steps:
S100: the steel cylinder seat is installed, at the steel cylinder seat hydraulic lifting system is installed subsequently, described hydraulic lifting system is used for promoting inner steel cylinder of chimney to be installed, and described steel cylinder seat is used for supporting inner steel cylinder of chimney:
S200: make and install lifting platform;
S300: the processing space outside chimney is prefabricated into steel plate the standard paragraphs of a plurality of sizes to be installed;
From the chimney top by order from top to bottom the steel inner cylinder standard paragraphs is installed section by section, until steel inner cylinder all installs;
The step that the steel inner cylinder standard paragraphs is installed comprises:
S400: utilize crane gear to have bad luck lifting platform in the chimney prefabricated steel inner cylinder standard paragraphs;
S500: the steel inner cylinder standard paragraphs among the S400 is risen to position to be installed by hydraulic lifting system;
S600: in position to be installed the steel inner cylinder standard paragraphs is docked and assembles,
Wherein, described hydraulic lifting system comprises hydraulic hoisting machine and hydraulic pressure lift oil way system, the hydraulic pressure lift oil way system comprises hydraulic power unit, hydraulic self-control valve, high-pressure oil pipe, oil tank and hydraulic joint original paper, described hydraulic hoisting machine comprises hydraulic jack, hoisting frame, lifting arm and locking device up and down, described up and down locking device further comprises upper and lower dop, piston ring and door type card
By hydraulic lifting system the step that the steel inner cylinder standard paragraphs among the S400 rises to position to be installed is specially:
When the hydraulic jack oil-feed, thereby described upper chuck tightens and lifts lifting arm and piston ring drives upwards lifting of steel inner cylinder; When the hydraulic jack oil return, its upper chuck is with the piston rod backhaul, and this moment, its lower dop automatic clamping lifting arm can not glide, and jack so repeatedly moves lifting arm drive cylindrical shell is constantly risen, until position to be installed;
After described position installs the steel inner cylinder standard paragraphs, unclamp up and down dop, lifting arm and piston ring are dropped to the position to be installed lower part tension of next joint steel inner cylinder standard paragraphs of described installation site, carry out again the lifting of next joint steel inner cylinder standard paragraphs.
CN 201010156024 2010-04-27 2010-04-27 Hydraulic lifting construction method for chimney steel inner cylinder Active CN102235107B (en)

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CN102535843B (en) * 2011-12-16 2014-03-12 马鞍山钢铁建设集团有限公司 Construction method of circular reinforced concrete chimney cylinder wall and hydraulic sliding mould device
CN103243961B (en) * 2013-03-15 2015-05-13 东北电业管理局烟塔工程公司 Titanium plate steel inner tank reversed construction device for chimney of thermal power station
CN103437589B (en) * 2013-08-14 2015-11-18 中国十七冶集团有限公司 A kind of inversion construction method of steel chimney cylinder
CN104563590B (en) * 2015-01-16 2017-01-04 江西建工第二建筑有限责任公司 Inner steel cylinder of chimney hydraulic pressure lift constructing device and method thereof
CN109488103B (en) * 2018-11-08 2021-06-01 中国化学工程第三建设有限公司 Hydraulic lifting construction method for large all-steel structure intercooling tower
CN111188526A (en) * 2019-06-18 2020-05-22 五冶集团上海有限公司 Steel inner cylinder mounting method
CN110847687B (en) * 2019-11-19 2021-06-15 山东国舜建设集团有限公司 Quick installation method of conical direct-discharge chimney

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