CN112499482A - Intelligent monitoring high-precision positioning steam drum hoisting device and hoisting method applied by same - Google Patents
Intelligent monitoring high-precision positioning steam drum hoisting device and hoisting method applied by same Download PDFInfo
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- CN112499482A CN112499482A CN202011486663.0A CN202011486663A CN112499482A CN 112499482 A CN112499482 A CN 112499482A CN 202011486663 A CN202011486663 A CN 202011486663A CN 112499482 A CN112499482 A CN 112499482A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/04—Safety gear for preventing collisions, e.g. between cranes or trolleys operating on the same track
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/06—Arrangements or use of warning devices
- B66C15/065—Arrangements or use of warning devices electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
- B66C5/04—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods with runways or tracks supported for movements relative to bridge or gantry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
- B66C5/06—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods with runways or tracks supported for lateral swinging movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses an intelligent monitoring high-precision positioning steam drum hoisting device and a hoisting method applied by the same, wherein the intelligent monitoring high-precision positioning steam drum hoisting device comprises a supporting beam assembly, a hydraulic lifting assembly fixedly arranged on the supporting beam assembly, a steel strand anchored with the hydraulic lifting assembly and a monitoring alarm assembly for monitoring the hoisting process of a boiler steam drum in real time. The method comprises the steps of utilizing two groups of positioning steam drum hoisting devices to carry out double-hoisting-point inclined hoisting on the boiler steam drum, carrying out trial hoisting before formal hoisting, and checking whether the devices and related control loops work normally or not; and during formal hoisting, the position of the boiler drum is monitored in real time through the monitoring alarm assembly, and obstacles are avoided until the boiler drum is safely in place. In the hoisting process, the invention can carry out digital intelligent monitoring on the boiler drum, ensure the stress balance of related components and ensure the safe and stable positioning of the boiler drum.
Description
Technical Field
The invention belongs to the technical field of installation engineering of large-scale thermal power plants, relates to lifting of a boiler drum, and particularly relates to an intelligent monitoring high-precision positioning drum lifting device and an application lifting method thereof.
Background
In the installation project of the large-scale thermal power plant, a boiler steam drum is generally hoisted in place by using a winch or a large-scale crane in China, and the hoisting technology is mature after long-term research of professionals. However, with the leap-over development of high-parameter, large-capacity and various types of thermal power station units at home and abroad, the design of a power station system is continuously optimized, the plane layout space is gradually compressed, the layout position of a steam drum, which is an important component of a boiler in a thermal power plant, is continuously improved, and the hoisting space of equipment in a construction site is also continuously reduced.
However, the conventional vertical hoisting technology (hoisting a boiler drum in place by using a winch or a large crane) generally has the defects of slow construction progress, high cost, long construction period, high cost, low intelligent degree and the like, so that the conventional vertical hoisting technology cannot meet the new requirements, and how to improve the hoisting technical level of the boiler drum becomes an important research topic in the field of installation engineering of large-scale thermal power plants. At present, a boiler drum hoisting method of a thermal power plant is developed by utilizing hydraulic lifting equipment in the industry, and the boiler drum can be safely hoisted to a higher position in a construction site with narrow space and complex environment. However, in the process of hoisting a boiler drum by using hydraulic lifting equipment, the following technical problems still need to be solved, which are specifically shown in the following:
(1) the stress of related components is difficult to adjust in the hoisting process
The lifting lug stress calculation shows that the stress degree of the left side of the steam drum is greater than that of the right side of the steam drum in the hoisting process of the boiler steam drum. If the stress of related components is unbalanced, the steam pocket inclines to adjust and the horizontal adjustment in-process, and the steam pocket is because of upper and lower resonance, and its tip easily collides with boiler steelframe and forms the danger point, and the safety and stability of hoist and mount in-process is difficult to be guaranteed.
(2) Because of uneven stress, the hoisting steel strand is easy to be in an inclined state
In the process of inclination adjustment and horizontal adjustment of a boiler steam drum, hoisting steel strands are difficult to ensure a relatively vertical state due to uneven stress, so that deviation is easy to occur in adjustment of the position of the steam drum, the hoisting in-place precision is greatly reduced, and the hoisting efficiency of the steam drum is seriously slowed down.
(3) The real-time position of the boiler steam pocket is difficult to adjust in the hoisting process
In the process of hoisting the boiler drum, the real-time position of the boiler drum is often observed through manual inspection, and related personnel are remotely commanded to adjust the position of the boiler drum. The intelligent degree is low, only judges the position of boiler steam drum with the naked eye, and the accuracy is difficult to obtain guaranteeing, and the command error easily appears, to steam drum position error adjustment, and then causes the steam drum and the condition emergence that hoist and mount passageway cataract obstacle collided.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an intelligent monitoring high-precision positioning steam drum hoisting device and a hoisting method applied by the same, so that a boiler steam drum can be digitally and intelligently monitored in the hoisting process, stress balance of related components is ensured, and the aim of safely and stably positioning the boiler steam drum is fulfilled.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an intelligent monitoring high-precision positioning steam drum hoisting device comprises a supporting beam assembly, a hydraulic lifting assembly and a steel strand, wherein the hydraulic lifting assembly is fixedly arranged on the supporting beam assembly, and the steel strand is anchored with the hydraulic lifting assembly; the monitoring and alarming assembly is used for monitoring the position of the boiler drum in real time in the hoisting process; the monitoring alarm assembly comprises a laser range finder and an elevation positioning instrument which are fixedly arranged at two ends of the boiler steam drum, and an electronic theodolite arranged below the supporting beam assembly, and the laser range finder, the elevation positioning instrument and the electronic theodolite are electrically connected with the electric control cabinet.
As a limitation of the invention, a steel strand guide frame is further arranged on the supporting beam assembly and used for supporting the steel strands discharged from the upper part of the hydraulic lifting assembly.
As a further limitation of the present invention, the supporting beam assembly comprises at least two fixed supporting beams fixed side by side on the boiler top plate beam layer, at least two longitudinal moving beams fixed side by side on the fixed supporting beam slideway, and a transverse moving beam fixed on the longitudinal moving beam slideway; wherein, hydraulic lifting subassembly and steel strand wires leading truck all set firmly on the horizontal migration roof beam.
As a still further limitation of the present invention, the longitudinal moving beam is fixedly arranged on the slideway of the fixed supporting beam through the first weight shifter, and the slideway of the fixed supporting beam is provided with a first traction chain block for controlling the movement of the first weight shifter; the transverse moving beam is fixedly arranged on the longitudinal moving beam through the second heavy object shifter, and the longitudinal moving beam is provided with a second traction chain block for controlling the second heavy object shifter to move.
As another limitation of the invention, the invention also comprises a transverse hoisting beam which is arranged right above the boiler drum hoisting point and fixedly connected with the transverse moving beam into a whole through a steel strand.
As a further limitation of the invention, a pin shaft hanging plate used for connecting a boiler steam pocket is fixedly arranged below the transverse hoisting beam.
The invention also discloses a boiler drum double-lifting-point inclined hoisting method, which utilizes two groups of intelligent monitoring high-precision positioning drum hoisting devices as claimed in any one of claims 1 to 6, and comprises the following steps which are sequentially carried out:
s1, respectively installing the two steam drum hoisting devices on two sides of the top end of the boiler in a combined manner, debugging a hydraulic lifting assembly, and checking whether the steam drum hoisting devices meet hoisting conditions;
s2, controlling the steam drum hoisting device to try to hoist the boiler steam drum, and checking whether the steam drum hoisting device and the related control loop work normally;
s3, controlling the steam pocket hoisting device to obliquely hoist the boiler steam pocket, and monitoring the position of the boiler steam pocket in real time through the monitoring alarm assembly in the oblique hoisting process to avoid obstacles until the boiler steam pocket is safely in place.
As a limitation of the present invention, step S2 includes the following steps performed in order:
b1, controlling two groups of hydraulic lifting components, synchronously lifting two lifting points of the boiler drum by half a stroke, suspending lifting, and checking whether the drum lifting device works normally;
b2, after ensuring that the steam drum hoisting device works normally, continuously controlling the two groups of hydraulic lifting assemblies, synchronously lifting two lifting points of the boiler steam drum for two strokes, then descending for one stroke, suspending lifting, and checking whether related control loops in the steam drum hoisting device work normally;
b3, after the work is finished and confirmed, entering the formal hoisting.
As a further limitation of the present invention, in step S3, the tilting and hoisting process of the boiler drum is as follows:
c1, controlling the first group of hydraulic lifting assemblies to independently lift a lifting point of the boiler drum, enabling the boiler drum to incline by 20-40 degrees, and ensuring that the total projection length of the boiler drum is less than the net distance between main pillars of the boiler furnace;
c2, controlling the second traction chain block to adjust the position of the transverse moving beam, and enabling the steel strand to recover the vertical state;
c3, controlling the two groups of hydraulic lifting components, synchronously lifting two lifting points of the boiler steam drum, and suspending lifting when the high-position lifting point of the steam drum exceeds the actual elevation;
c4, controlling the second group of hydraulic lifting components to lift the low-position lifting point of the boiler steam pocket, simultaneously controlling the first group of hydraulic lifting components to lower the high-position lifting point of the boiler steam pocket, and controlling the second traction chain block to adjust the position of the transverse shifting beam until the boiler steam pocket returns to the horizontal state at the on-position elevation;
c5, controlling the first traction chain block to adjust the position of the longitudinal moving beam, and moving the boiler drum to the position of the position;
c6, after the boiler drum is hoisted in place, installing a drum suspender, and controlling two groups of hydraulic hoisting assemblies to finely adjust the elevation of the boiler drum until a preset value is reached, thereby completing the hoisting operation of the boiler drum.
As another limitation of the present invention, the monitoring process of the boiler drum by the monitoring and alarming module in step S3 is as follows:
d1, monitoring the distance between the boiler steam pocket and the obstacle in the hoisting channel by a laser range finder in the monitoring alarm assembly, and transmitting data to the electric control cabinet in real time;
d2, simultaneously, monitoring the integral elevation, the inclination angle and the levelness of the boiler steam pocket by an elevation positioning instrument in the monitoring alarm assembly, and transmitting data to the electric control cabinet in real time;
d3, simultaneously, monitoring the side length error and the vertical angle of the obstacle in the hoisting channel by an electronic theodolite in the monitoring alarm assembly, and transmitting data to the electric control cabinet in real time;
d4, the electrical control cabinet collects the data and displays the data to the field operator through the control panel.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts the hydraulic lifting assembly to hoist the boiler steam pocket, compared with the traditional hoisting method of a winch and a pulley block, the hoisting method has the advantages of large hoisting capacity and simple operation, and the hoisting height is not limited as long as a reasonable weighing hoisting point is provided; compared with the traditional hoisting method of the same-tonnage large crane equipment, the method has the advantages of smaller volume, lighter weight, small occupied space of a construction site and unique advantages in construction occasions where the space is narrow and the conventional large crane machinery cannot enter; and this device overall structure dismantles the simple installation, and construction period is short, not only can satisfy the demand of single boiler drum vertical hoisting, can also apply to the hoist and mount of the different equipment of similar construction environment after the construction, and reuse rate is high, and economic benefits is considerable.
(2) According to the invention, the laser range finder, the electronic theodolite and the elevation positioning instrument are integrated to form a monitoring alarm assembly, various monitoring data can be visually displayed on a control panel of the electric control cabinet, and workers can conveniently adjust the real-time position of the boiler drum. This device intelligent degree is high, can effectively reduce the influence of on-the-spot weather or other human factors, combines the manual work to patrol and examine, can ensure the accuracy to boiler drum position control, avoids the collision of boiler drum promotion in-process and hoist and mount passageway internal barrier, and then can ensure that the boiler drum is safe, stable taking one's place in constrictive construction space.
(3) The steel strand guide frame can ensure that the steel strands discharged above the hydraulic lifting assembly are always vertical within 1.5 meters, so that the steel strands can smoothly run in the process of lifting a boiler drum, and the condition of cross knotting can be avoided; the stable structure of the symmetrical triangle of the steel strand guide frame has enough strength and rigidity to bear the whole weight of the steel strand; the rollers arranged on the steel strand guide frame can keep rolling friction between the steel strands and the steel strand guide frame, and the resistance is relatively small.
(4) The longitudinal moving beam and the transverse moving beam in the supporting beam assembly can correspondingly move under the control of the weight shifter and the traction chain block, so that the stress balance of related components can be effectively ensured in the process of lifting the boiler steam drum, and the steel strand is always kept in a relatively vertical state, thereby avoiding the collision between the end part of the boiler steam drum and obstacles in a lifting channel and ensuring the accurate positioning of the boiler steam drum.
(5) The invention adopts a double-lifting-point inclined lifting mode, corresponding trial lifting is carried out before lifting, and the position of the boiler steam pocket is monitored in real time by the monitoring alarm assembly in the lifting process, so that accidents can be effectively avoided, and the safety is extremely high; and the unsettled gesture of boiler steam pocket can accurate control in the hoist and mount process, makes the boiler steam pocket can be at the high-speed conversion between horizontal state or vertical state, and hoist and mount efficiency is high and can effectively avoid the collision to take place.
In conclusion, the invention has the advantages of reliable structure, simple operation and high automation degree, related components can be locked at any position in the hoisting process so as to carry out fault treatment or work receiving overnight and the like, the safety and stability of the hoisting process of the boiler drum are high, and the invention is suitable for being used in the hoisting of the boiler drum of a large-scale thermal power plant.
Drawings
The invention is described in further detail below with reference to the figures and the embodiments.
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a hydraulic lifting assembly according to embodiment 1 of the present invention;
fig. 3 is a top view of a device mounting structure before hoisting in embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of the hoisting process in embodiment 2 of the present invention;
in the figure: 1. fixing the support beam; 2. a longitudinal moving beam; 3. a transverse moving beam; 4. a hydraulic lift assembly; 5. a steel strand guide frame; 6. transversely hoisting the beam; 7. steel strand wires; 8. a first traction chain block; 9. a pin shaft hanging plate; 10. a boiler drum; 11. a laser range finder; 12. an elevation positioning instrument; 13. an electronic theodolite; 14. a hydraulic pump station; 15. an electrical control cabinet; 16. operation surface operation platform.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the description of the preferred embodiment is only for purposes of illustration and understanding, and is not intended to limit the invention.
Embodiment 1 intelligent monitoring high-precision positioning steam drum hoisting device
As shown in fig. 1, the present embodiment includes a steel strand 7, a support beam assembly, a hydraulic lifting assembly 4, and a monitoring alarm assembly. The embodiment measures the space verticality of the boiler drum 10 in real time through the monitoring alarm assembly, is not influenced by on-site weather or other human factors, can provide a basis for workers to adjust the position of the boiler drum 10 in the hoisting process, and further ensures the safety and stability of the hoisting process of the boiler drum 10.
A support beam assembly
The supporting beam assembly is the core supporting structure of the steam drum hoisting device and is used for fixing the hydraulic lifting assembly 4 and bearing the whole weight of the boiler steam drum 10 in the hoisting process. In order to ensure that the steel strands 7 in the hydraulic lifting assembly 4 are always kept in a vertical state when the boiler drum 10 is hoisted, the supporting beam assembly in the embodiment can drive the hydraulic lifting assembly 4 to longitudinally move and can also drive the hydraulic lifting assembly 4 to transversely move. The concrete structure is shown in fig. 1, the supporting beam assembly comprises at least two fixed supporting beams 1 which are fixedly arranged on a boiler top plate beam layer side by side, at least two longitudinal moving beams 2 which are fixedly arranged on slideways of the fixed supporting beams 1 side by side, and transverse moving beams 3 which are fixedly arranged on slideways of the longitudinal moving beams 2.
Wherein the fixed support beam 1 is used for bearing the whole weight of the hydraulic lifting assembly 4 and the boiler drum 10, and the surface is provided with a slideway for the longitudinal moving beam 2 to move. Because the fixed supporting beams 1 are basic supporting structures, in order to ensure the stability and reliability of the whole structure of the device, two fixed supporting beams 1 are arranged in the embodiment.
The longitudinal moving beam 2 is used for realizing the longitudinal movement of the hydraulic lifting assembly 4, and the surface is provided with a slideway for moving the transverse moving beam 3. In this embodiment, the longitudinal moving beam 2 is fixed on the slideways of the two fixed support beams 1 by the first weight shifter, and the length direction of the longitudinal moving beam 2 is perpendicular to the length direction of the fixed support beams 1. Wherein, the fixed support beam 1 is also provided with a first traction chain block 8 for controlling the movement of the first weight shifter. In this embodiment, two longitudinal moving beams 2 are provided above the fixed support beam 1, and the longitudinal moving beams 2 and the fixed support beam 1 form a structure shaped like a Chinese character jing.
The transverse transfer beam 3 is used to effect transverse transfer of the hydraulic lifting assembly 4. In this embodiment, the transverse moving beam 3 is fixed on the slideways of the two longitudinal moving beams 2 by the second weight shifter, and the length direction of the transverse moving beam 3 is perpendicular to the length direction of the fixed supporting beam 1. Wherein, a second traction chain block for controlling the movement of the second heavy object shifter is also arranged on the longitudinal moving beam 2.
Secondly, the hydraulic lifting component 4 and the steel strand 7
The hydraulic lifting assembly 4 is used as a power source for vertical hoisting and is integrally and fixedly arranged above the transverse moving beam 3. In this embodiment, the hydraulic lifting assembly 4 is a hydraulic lifting device in the prior art, and specifically, as shown in fig. 2, the hydraulic lifting assembly 4 may anchor two sets of steel strands 7 and lift the two sets of steel strands 7 at the same time. In order to ensure that the steel strand 7 discharged from the upper part of the hydraulic lifting assembly 4 is always vertical within the range of 1.5, a steel strand guide frame 5 is further arranged above the hydraulic lifting assembly 4, and the steel strand guide frame 5 is also fixedly arranged on the transverse moving beam 3.
As shown in fig. 1, the strand guide 5 includes two symmetrical parts, and the two parts are connected by a plurality of sets of mutually crossed reinforcing ribs to form a stable structure of a symmetrical triangle. Each part of the steel strand guide frame 5 can support a group of steel strands 7 which are discharged from the upper side of the hydraulic lifting assembly 4, and the part of each part of the steel strand guide frame 5, which is in contact with the steel strands 7, is provided with a roller, so that rolling friction is kept between the steel strands 7 and the steel strand guide frame 5, and the action of resistance can be reduced.
In order to ensure the stability and safety of the hoisting process, in this embodiment, a transverse hoisting beam 6 which can move synchronously with the transverse moving beam 3 is further arranged right above the hoisting point of the boiler drum 10. The upper part of the transverse hoisting beam 6 is fixedly connected with the transverse moving beam 3 into a whole through a steel strand 7, and the lower part of the transverse hoisting beam 6 is fixedly provided with a pin shaft hoisting plate 9 used for connecting a boiler steam pocket 10.
Third, monitoring alarm assembly
The monitoring alarm assembly is used for monitoring the boiler drum 10 in the hoisting process in real time, and can provide data support for workers to adjust the position of the boiler drum 10. The monitoring alarm assembly comprises a laser range finder 11, an elevation positioning instrument 12 and an electronic theodolite 13, and the laser range finder 11, the elevation positioning instrument 12 and the electronic theodolite 13 are respectively electrically connected with an electric control cabinet 15 on a working face operating platform 16.
Specifically, as shown in fig. 1, the laser distance measuring instrument 11 is respectively arranged at two ends of the boiler drum 10 and used for monitoring the distance between the boiler drum 10 and an obstacle in the hoisting passage; the elevation positioning instruments 12 are respectively arranged at two ends above the boiler drum 10 and used for monitoring the overall elevation, the inclination angle and the levelness in the hoisting process of the boiler drum 10, and in the embodiment, the elevation positioning instruments 12 are Beidou positioning instruments; the electronic theodolite 13 is fixedly arranged below the fixed supporting beam 1 in the supporting beam assembly and used for monitoring the side length error and the vertical angle of the obstacle in the hoisting channel.
The steam pocket hoisting device of two sets of embodiment 1 is utilized to this embodiment, adopts the mode of two hoisting points slope hoists to hoist boiler steam pocket 10 to accessible control warning group price can effectively avoid the emergence of accident to boiler steam pocket 10 position real time monitoring among the hoist and mount process. The specific hoisting method is as follows:
step S1, assembling and installing steam pocket hoisting device
a1, respectively installing two groups of steam drum hoisting devices on two sides of the top end of the boiler in a combined manner by using a hoisting machine, and constructing a temporary operation surface operation platform 16, wherein as shown in fig. 3 in particular, a hydraulic pump station 14 communicated with a hydraulic lifting assembly 4 and an electric control cabinet 15 electrically connected with a monitoring alarm assembly are arranged on the operation surface operation platform 16;
a2, transporting the steam pocket to the lifting position of the boiler steel structure hearth, confirming the direction of the boiler steam pocket 10, measuring the central points of two ends of the steam pocket, and drawing a longitudinal and transverse central line on the outer surface of the boiler steam pocket 10; then connecting the pin shaft hanging plates 9 below the two groups of transverse hanging beams 6 with a lifting lug of a boiler drum 10 respectively;
a3, debugging the hydraulic lifting assembly 4 after the assembly and installation of all components are finished, checking whether the steam drum lifting device meets the lifting condition, and entering a trial lifting link after meeting the lifting condition.
Step S2, trying to lift
b1, controlling the two groups of hydraulic lifting assemblies 4, synchronously lifting two lifting points of the boiler drum 10 by a half stroke (about 100 mm) of a hydraulic cylinder of the hydraulic lifting assemblies 4, enabling the boiler drum 10 to leave the temporary supporting device, suspending lifting for 15 minutes, observing whether the boiler drum 10 slides downwards, and checking whether the drum lifting device works normally;
b2, after ensuring that the steam drum hoisting device works normally, continuously controlling the two groups of hydraulic lifting components 4, synchronously lifting two lifting points of the boiler steam drum 10 for two strokes (about 400 mm), then descending for one stroke, and checking whether related control loops in the steam drum hoisting device work normally;
b3, after the work is finished and confirmed, entering a formal hoisting link.
Step S3, formal lifting
c1, controlling the first group of hydraulic lifting components 4 to independently lift a lifting point of the boiler drum 10 through the electric control cabinet 15, enabling the boiler drum 10 to incline by 20-40 degrees, and ensuring that the total projection length of the boiler drum 10 is less than the net distance between main columns of the boiler furnace, as shown in fig. 4 specifically; then controlling a second traction chain block to adjust the positions of the two groups of transverse moving beams 3 to enable the steel strands 7 to recover the vertical state;
c2, controlling the two groups of hydraulic lifting components 4, synchronously lifting two lifting points of the boiler steam drum 10, and suspending lifting when the high-position lifting point of the steam drum exceeds the actual elevation; then controlling the second group of hydraulic lifting components 4 to lift the low-position lifting point of the boiler steam drum 10, simultaneously controlling the first group of hydraulic lifting components 4 to lower the high-position lifting point of the boiler steam drum 10, and controlling the second traction chain block to adjust the positions of the two groups of transverse moving beams 3 until the boiler steam drum 10 returns to the horizontal state at the in-position elevation;
c3, controlling the first traction chain block 8 to adjust the position of the longitudinal moving beam 2, and moving the boiler drum 10 to the position; after the boiler drum 10 is lifted to a proper position, a drum suspender is installed, then the elevation of the boiler drum 10 is checked, and the elevation is adjusted by adjusting a nut of the drum suspender; before adjusting the nut, the hydraulic lifting assembly 4 is controlled to lift the steam pocket, after the nut is adjusted, the hydraulic lifting assembly 4 is controlled to zero load, then the elevation of the boiler steam pocket 10 is checked, and the process is circulated until the elevation of the boiler steam pocket 10 is adjusted to a preset value; and finally, adjusting the longitudinal and transverse center lines of the boiler steam drum 10, and fixing the boiler steam drum 10 on a nearby steel structure after the adjustment is finished, so that the hoisting operation of the boiler steam drum 10 is completed.
In the step S3, the position of the boiler drum 10 is monitored in real time by the monitoring alarm component, so as to avoid obstacles and ensure that the lifting process of the boiler drum 10 is safe in place, and the specific operations are as follows:
d1, monitoring the distance between the boiler steam pocket 10 and the obstacle in the hoisting channel by the laser range finder 11 in the monitoring alarm assembly, and transmitting the data to the electric control cabinet 15 in real time;
d2, simultaneously, monitoring the whole elevation, the inclination angle and the levelness of the boiler steam pocket 10 by the elevation positioning instrument 12 in the monitoring alarm assembly, and transmitting the data to the electric control cabinet 15 in real time;
d3, simultaneously, monitoring the side length error and the vertical angle of the obstacle in the hoisting channel by the electronic theodolite 13 in the monitoring alarm assembly, and transmitting the data to the electric control cabinet 15 in real time;
d4, the electrical control cabinet 15 summarize the above data and display them to the field operator through the control panel, so as to provide basis for the operator to adjust the position of the boiler drum 10 and ensure the boiler drum 10 to be safely in place.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An intelligent monitoring high-precision positioning steam drum hoisting device comprises a supporting beam assembly, a hydraulic lifting assembly and a steel strand, wherein the hydraulic lifting assembly is fixedly arranged on the supporting beam assembly, and the steel strand is anchored with the hydraulic lifting assembly; the method is characterized in that: the monitoring and alarming assembly is used for monitoring the position of the boiler drum in real time in the hoisting process; the monitoring alarm assembly comprises a laser range finder and an elevation positioning instrument which are fixedly arranged at two ends of the boiler steam drum, and an electronic theodolite arranged below the supporting beam assembly, and the laser range finder, the elevation positioning instrument and the electronic theodolite are electrically connected with the electric control cabinet.
2. The intelligent monitoring high-precision positioning steam drum hoisting device according to claim 1, characterized in that: and the supporting beam assembly is also provided with a steel strand guide frame, and the steel strand guide frame is used for supporting the steel strands discharged from the upper part of the hydraulic lifting assembly.
3. The intelligent monitoring high-precision positioning steam drum hoisting device according to claim 2, characterized in that: the supporting beam assembly comprises at least two fixed supporting beams which are fixedly arranged on a top plate beam layer of the boiler side by side, at least two longitudinal moving beams which are fixedly arranged on a fixed supporting beam slideway side by side and a transverse moving beam which is fixedly arranged on the longitudinal moving beam slideway; wherein, hydraulic lifting subassembly and steel strand wires leading truck all set firmly on the horizontal migration roof beam.
4. The intelligent monitoring high-precision positioning steam drum hoisting device according to claim 3, characterized in that: the longitudinal moving beam is fixedly arranged on a slideway of the fixed supporting beam through a first weight shifter, and a first traction chain block for controlling the movement of the first weight shifter is arranged on the slideway of the fixed supporting beam; the transverse moving beam is fixedly arranged on the longitudinal moving beam through the second heavy object shifter, and the longitudinal moving beam is provided with a second traction chain block for controlling the second heavy object shifter to move.
5. The intelligent monitoring high-precision positioning steam drum hoisting device according to any one of claims 1-4, characterized in that: the horizontal lifting beam is fixedly connected with the horizontal moving beam into a whole through a steel strand right above a boiler drum lifting point.
6. The intelligent monitoring high-precision positioning steam drum hoisting device according to claim 5, characterized in that: and a pin shaft hanging plate used for connecting a boiler steam drum is fixedly arranged below the transverse hoisting beam.
7. A boiler drum double-lifting-point inclined hoisting method is characterized in that: the intelligent monitoring high-precision positioning steam drum hoisting device utilizing two groups of the intelligent monitoring high-precision positioning steam drum hoisting devices as claimed in any one of claims 1 to 6 comprises the following steps which are sequentially carried out:
s1, respectively installing the two steam drum hoisting devices on two sides of the top end of the boiler in a combined manner, debugging a hydraulic lifting assembly, and checking whether the steam drum hoisting devices meet hoisting conditions;
s2, controlling the steam drum hoisting device to try to hoist the boiler steam drum, and checking whether the steam drum hoisting device and the related control loop work normally;
s3, controlling the steam pocket hoisting device to obliquely hoist the boiler steam pocket, and monitoring the position of the boiler steam pocket in real time through the monitoring alarm assembly in the oblique hoisting process to avoid obstacles until the boiler steam pocket is safely in place.
8. The boiler drum double-lifting-point inclined hoisting method according to claim 7, characterized in that: step S2 includes the following steps performed in order:
b1, controlling two groups of hydraulic lifting components, synchronously lifting two lifting points of the boiler drum by half a stroke, and checking whether the drum lifting device works normally;
b2, after ensuring that the steam drum hoisting device works normally, continuously controlling the two groups of hydraulic lifting assemblies, synchronously lifting two lifting points of the boiler steam drum for two strokes, then descending for one stroke, and checking whether related control loops in the steam drum hoisting device work normally;
b3, after the work is finished and confirmed, entering the formal hoisting.
9. The boiler drum double-lifting-point inclined hoisting method according to claim 8, characterized in that: in step S3, the inclined hoisting process of the boiler drum is as follows:
c1, controlling the first group of hydraulic lifting assemblies to independently lift a lifting point of the boiler drum, enabling the boiler drum to incline by 20-40 degrees, and ensuring that the total projection length of the boiler drum is less than the net distance between main pillars of the boiler furnace;
c2, controlling the second traction chain block to adjust the position of the transverse moving beam, and enabling the steel strand to recover the vertical state;
c3, controlling the two groups of hydraulic lifting components, synchronously lifting two lifting points of the boiler steam drum, and suspending lifting when the high-position lifting point of the steam drum exceeds the actual elevation;
c4, controlling the second group of hydraulic lifting components to lift the low-position lifting point of the boiler steam pocket, simultaneously controlling the first group of hydraulic lifting components to lower the high-position lifting point of the boiler steam pocket, and controlling the second traction chain block to adjust the position of the transverse shifting beam until the boiler steam pocket returns to the horizontal state at the on-position elevation;
c5, controlling the first traction chain block to adjust the position of the longitudinal moving beam, and moving the boiler drum to the position of the position;
c6, after the boiler drum is hoisted in place, installing a drum suspender, and controlling two groups of hydraulic hoisting assemblies to finely adjust the elevation of the boiler drum until a preset value is reached, thereby completing the hoisting operation of the boiler drum.
10. The boiler drum double-lifting-point inclined hoisting method according to any one of claims 7 to 9, characterized in that: in step S3, the monitoring process of the boiler drum by the monitoring alarm component is as follows:
d1, monitoring the distance between the boiler steam pocket and the obstacle in the hoisting channel by a laser range finder in the monitoring alarm assembly, and transmitting data to the electric control cabinet in real time;
d2, simultaneously, monitoring the integral elevation, the inclination angle and the levelness of the boiler steam pocket by an elevation positioning instrument in the monitoring alarm assembly, and transmitting data to the electric control cabinet in real time;
d3, simultaneously, monitoring the side length error and the vertical angle of the obstacle in the hoisting channel by an electronic theodolite in the monitoring alarm assembly, and transmitting data to the electric control cabinet in real time;
d4, the electrical control cabinet collects the data and displays the data to the field operator through the control panel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353787A (en) * | 2021-07-02 | 2021-09-07 | 中国第十八冶金建设有限公司 | Hoisting method of waste heat boiler suspension type steam pocket |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353787A (en) * | 2021-07-02 | 2021-09-07 | 中国第十八冶金建设有限公司 | Hoisting method of waste heat boiler suspension type steam pocket |
| CN113353787B (en) * | 2021-07-02 | 2022-05-03 | 中国第十八冶金建设有限公司 | Hoisting method of waste heat boiler suspension type steam pocket |
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