CN113896089A - Method for building super-huge type blast furnace - Google Patents
Method for building super-huge type blast furnace Download PDFInfo
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- CN113896089A CN113896089A CN202111255652.6A CN202111255652A CN113896089A CN 113896089 A CN113896089 A CN 113896089A CN 202111255652 A CN202111255652 A CN 202111255652A CN 113896089 A CN113896089 A CN 113896089A
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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
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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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
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention relates to a method for constructing an oversize blast furnace, which comprises the following steps: a step of installing a portal crane, which is to install the portal crane on one side of the blast furnace building position; debugging and trial hoisting the gantry crane, debugging the mounted gantry crane, performing trial hoisting after debugging, and checking whether the rigidity and strength of a main stress structure of the crane meet the requirements or not; a step of building the blast furnace in modules, namely building a furnace shell and a steel structure of the blast furnace in modules; and a step of hoisting and mounting the blast furnace in modules, namely hoisting the built blast furnace modules to a mounting position in sequence by using a portal crane, and splicing and mounting. According to the method for constructing the super-huge blast furnace, the portal crane is arranged on one side of the construction position of the blast furnace, the lifting operation place can be flexibly changed, the influence of field conditions is small, the single maximum lifting weight is large, the blast furnace can be integrally lifted after being constructed in modules on the ground, the high-altitude operation amount is reduced, and the working efficiency and the safety during operation are improved.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment installation, in particular to a method for constructing an oversize blast furnace.
Background
With the integration of the state to the domestic steel industry, large steel plants in China successively eliminate the backward energy production, shut down aging equipment and small blast furnaces, and build new oversize blast furnaces to improve the capacity and efficiency of steel smelting.
For the hoisting operation in the process of building an extra-large blast furnace newly, a heavy tower crane is adopted in the traditional mode, and during construction in the mode, the heavy tower crane cannot move, so that the operation range is small, and the construction is not flexible enough. The maximum hoisting weight of the heavy tower crane is smaller, so that high-altitude operation is more during the construction of the super-large blast furnace, the safety risk is increased, and the construction efficiency of the blast furnace is low.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for constructing an oversized blast furnace, so as to solve the problems in the prior art.
According to the invention, the invention provides a method for constructing an oversize blast furnace, which comprises the following steps:
a step of installing a portal crane, which is to install the portal crane on one side of the blast furnace building position;
debugging and trial hoisting the gantry crane, debugging the mounted gantry crane, performing trial hoisting after debugging, and checking whether the rigidity and strength of a main stress structure of the crane meet the requirements or not;
a step of building the blast furnace in modules, namely building a furnace shell and a steel structure of the blast furnace in modules;
and a step of hoisting and mounting the blast furnace in modules, namely hoisting the built blast furnace modules to a mounting position in sequence by using a portal crane, and splicing and mounting.
Preferably, the gantry crane installing step comprises:
step S11, paving a track;
step S12, mounting the door frame on the track;
step S13, mounting the machine platform on the top of the door frame;
step S14, mounting the main and auxiliary arms of the gantry crane;
and step S15, installing a power device and an electric control system of the gantry crane.
Preferably, in the step S11, the tracks of the portal crane are two groups, each group of tracks includes two single tracks, a ballast layer is laid below each group of tracks, a plurality of sleepers are laid on the ballast layer, and the two single tracks of each group of tracks are fixed on the sleepers;
when the two groups of tracks are installed, the position of the central line of the other group of tracks is determined by taking the central line of one group of tracks as a reference and combining the track gauge.
Preferably, when the gantry and the machine platform are installed, a truck crane and a crawler crane are used for carrying out double-point hoisting.
Preferably, in step S14, when the main arm and the sub arm of the gantry crane are installed, one end of the main arm is connected to the machine platform, a support having the same height as the machine platform is disposed at one side of the gantry, the other end of the main arm is supported by the support, and then the sub arm is installed on the main arm.
Preferably, the gantry crane debugging and trial hoisting step further comprises:
the method comprises the steps of no-load testing, namely testing the actions of each mechanism of the gantry crane respectively, checking the action correctness of each electrical control loop and the action accuracy of each mechanism, and adjusting each safety limiting device;
a static load test step, namely respectively carrying out 100% static load test and 125% static load test according to test run requirements so as to verify the strength, rigidity and braking reliability of steel structures and mechanisms of all parts and the static stability of the whole machine;
the dynamic load test step, namely hoisting rated loads corresponding to various amplitudes, enabling various mechanisms to rotate in turn, measuring data such as power, speed, motor temperature rise and the like of the various mechanisms, and verifying the dynamic stability of the crane; and hoisting test loads which are 1.1 times of rated loads of all amplitudes, and enabling all mechanisms to rotate in turn.
Preferably, the step of testing under static load further comprises:
loading 1 time of rated load to perform 100% static load test, suspending for ten minutes after loading and leaving the ground 100-200 mm, and doing no other actions except for lifting the low-speed gear for the car;
after the 100% static load test is finished, loading to 1.25 times of the rated load without impact, carrying out 125% static load test, suspending for ten minutes, checking that the main steel structural member of the crane does not have permanent deformation, the rotary part and the supporting roller do not have the phenomenon of separation, visually checking that no crack, paint peeling or other damage is seen, the joint does not have looseness or damage, and checking the static stability of the whole machine.
Preferably, the dynamic load test step further comprises:
the hoisting mechanism tests, the hoisting mechanism is hoisted and descended for three times respectively at a stable working speed, the hoisting brake is required to be stable, the hook slipping phenomenon cannot occur in the descending brake, and the overload test only performs one cycle;
the test of the swing mechanism, the swing mechanism rotates 360 degrees clockwise and anticlockwise at rated rotation speed, the starting and braking are required to be stable, the starting and braking time is more than 5 seconds, and sudden reverse action cannot be realized;
the walking mechanism tests, the walking mechanism lifts the test load to move back and forth for three times respectively with 400 mm-600 mm above the ground, and the overload test only makes one cycle;
and (4) linkage test, namely performing linkage test of the lifting mechanism and the rotating mechanism after the lifting mechanism test, the rotating mechanism test and the traveling mechanism test are completed, or performing linkage test of the lifting mechanism and the traveling mechanism three times respectively.
Preferably, in the blast furnace module building step, the furnace shell and the steel structure of the blast furnace are divided into a plurality of modules according to the rated lifting capacity of the portal crane, and the weight of each module is not higher than the rated lifting capacity of the portal crane.
Preferably, when the blast furnace shell module is lifted, four lifting lugs are uniformly arranged on the outer wall of the uppermost furnace shell of the blast furnace shell module along the circumferential direction of the furnace shell, four equal-length lifting ropes are connected to the suspension points of the portal crane, and the lower ends of the lifting ropes are respectively connected to the four lifting lugs for lifting.
According to the method for constructing the super-huge blast furnace, the portal crane is arranged on one side of the construction position of the blast furnace, the lifting operation place can be flexibly changed, the influence of field conditions is small, the single maximum lifting weight is large, the blast furnace can be integrally lifted after being constructed in modules on the ground, the high-altitude operation amount is reduced, and the working efficiency and the safety during operation are improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a flow chart of a method of constructing an oversized blast furnace according to an embodiment of the invention.
Fig. 2 is a schematic structural view showing a gantry crane in a method for constructing an oversized blast furnace according to an embodiment of the present invention.
In the figure: the track comprises a track 1, a portal 2, a machine table 3, a main arm 4, an auxiliary arm 5, a railway ballast layer 6, a sleeper 7 and a support 8.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
Referring to fig. 1, the invention provides a method for constructing an oversized blast furnace, which specifically comprises the following steps:
a gantry crane installation step S1 is to install a gantry crane on one side of the blast furnace construction position.
Specifically, the gantry crane installation step includes:
and step S11, paving the track 1. The tracks 1 of the portal crane are two groups, each group of tracks comprises two single tracks, a ballast layer 6 is laid below each group of tracks, a plurality of sleepers 7 are laid on the ballast layer 6, and the two single tracks of each group of tracks are fixed on the sleepers 7. When two groups of tracks are installed, the position of the central line of one group of tracks is determined by taking the central line of the other group of tracks as a reference and combining the track gauge, so that the relative error can be controlled within an allowable deviation range by a unified reference mode. After the installation of the track is finished, the track is checked and accepted, and the track acceptance standard is executed according to the following requirements:
step S12, the gantry 2 is mounted on the rail. When the gantry 2 is installed, a truck crane and a crawler crane are used for double-point hoisting, the hoisting weight required by the truck crane and the crawler crane is calculated according to the self weight and the hoisting point position of the gantry 2 before hoisting, the hoisting weight is not more than 80% of the rated hoisting weight of the truck crane and the crawler crane, and the hoisting safety is ensured. The truck crane and the crawler crane are respectively arranged on two sides of the two groups of rails, the arm support rotates to be close to a vertical state with the rails after the gantry is hoisted, ground workers direct the crawler crane to move along a direction vertical to the rails according to the relative position of rollers at the bottom of the gantry and the rails, the rollers are aligned with the rails, then the truck crane and the crawler crane simultaneously descend the gantry, and the gantry is accurately installed on the rails.
And step S13, mounting the machine table 3 on the top of the door frame. When the machine table 3 is installed, a truck crane and a crawler crane are used for double-point hoisting, the hoisting weight required by the truck crane and the crawler crane is calculated according to the self weight and the hoisting point position of the machine table 3 before hoisting, the hoisting weight is not more than 80% of the rated hoisting weight of the truck crane and the crawler crane, and the hoisting safety is ensured. The truck crane and the crawler crane are respectively arranged on two sides of the two groups of tracks, the arm support rotates to be close to a vertical state with the tracks after the machine table is lifted, the machine table is connected with the gantry through a large slewing bearing, the slewing bearing is connected to the top of the gantry before the machine table is lifted, when the machine table is installed, a ground worker directs the crawler crane to move along a direction perpendicular to the tracks according to the relative position of the lifted machine table and the slewing bearing, the installation hole in the machine table is aligned with the installation hole of the slewing bearing, then the truck crane and the crawler crane simultaneously descend the gantry, the gantry is accurately installed on the slewing bearing at the top of the gantry, and then the machine table and the slewing bearing are fixedly connected through bolts.
And step S14, mounting the main arm and the auxiliary arm of the gantry crane. When the main arm and the auxiliary arm of the gantry crane are installed, one end of the main arm 4 is connected to the machine platform, a support 8 which is equal to the machine platform in height is arranged on one side of the gantry, as shown in fig. 2, the other end of the main arm 4 is supported on the support 8, and then the auxiliary arm 5 is installed on the main arm 4. The installation of main arm 4 can use a truck crane and a track to hang and carry out two-point hoist and mount and install, and the dead weight of auxiliary arm 5 is little, can use two track to hang and carry out two-point hoist and mount and install. And after the main arm and the auxiliary arm are installed, other auxiliary structures on the main arm and the auxiliary arm are installed at the same time.
And step S15, installing a power device and an electric control system of the gantry crane. After the main steel structural members of the gantry crane are installed, a power device and an electrical control system of the gantry crane are installed, the power device and the electrical control system specifically comprise a power box, a driving motor, a speed reducer, a winch, an electrical control cabinet and the like, and the components are specifically installed and constructed according to installation drawings and manuals of the gantry crane.
And a portal crane debugging and trial hoisting step S2, debugging the mounted portal crane, performing trial hoisting after debugging, and checking whether the rigidity strength of the main stress structure of the crane meets the requirement.
Specifically, the debugging and trial hoisting steps of the gantry crane comprise:
and a no-load test step, which is used for respectively testing the actions of each mechanism of the gantry crane, checking the action correctness of each electrical control loop and the action accuracy of each mechanism, and adjusting each safety limiting device.
And (3) a static load test step, namely respectively carrying out 100% static load test and 125% static load test according to the test run requirement so as to verify the strength, rigidity and braking reliability of steel structures and mechanisms of all parts and the static stability of the whole machine. The test method specifically comprises the following steps: loading 1 time of rated load to perform 100% static load test, suspending for ten minutes after loading and leaving the ground 100-200 mm, and doing no other actions except for lifting the low-speed gear for the car; after the 100% static load test is finished, loading to 1.25 times of the rated load without impact, carrying out 125% static load test, suspending for ten minutes, checking that the main steel structural member of the crane does not have permanent deformation, the rotary part and the supporting roller do not have the phenomenon of separation, visually checking that no crack, paint peeling or other damage is seen, the joint does not have looseness or damage, and checking the static stability of the whole machine.
The dynamic load test step, namely hoisting rated loads corresponding to various amplitudes, enabling various mechanisms to rotate in turn, measuring data such as power, speed, motor temperature rise and the like of the various mechanisms, and verifying the dynamic stability of the crane; and hoisting test loads corresponding to 1.1 times of rated loads of various amplitudes, and carrying out overload dynamic load tests to ensure that various mechanisms rotate in turn, wherein the speed and the motor temperature rise are not detected during the overload dynamic load tests. The test method specifically comprises the following steps: the hoisting mechanism tests, the hoisting mechanism is hoisted and descended for three times respectively at a stable working speed, the hoisting brake is required to be stable, the hook slipping phenomenon cannot occur in the descending brake, and the overload test only performs one cycle; the test of the swing mechanism, the swing mechanism rotates 360 degrees clockwise and anticlockwise at rated rotation speed, the starting and braking are required to be stable, the starting and braking time is more than 5 seconds, and sudden reverse action cannot be realized; the walking mechanism tests, the walking mechanism lifts the test load to move back and forth for three times respectively with 400 mm-600 mm above the ground, and the overload test only makes one cycle; and (4) linkage test, namely performing linkage test of the lifting mechanism and the rotating mechanism after the lifting mechanism test, the rotating mechanism test and the traveling mechanism test are completed, or performing linkage test of the lifting mechanism and the traveling mechanism three times respectively.
And a blast furnace module building step S3, wherein the furnace shell and the steel structure of the blast furnace are built in modules.
In the step, the furnace shell and the steel structure of the blast furnace are divided into a plurality of modules according to the rated lifting capacity of a portal crane, and the weight of each module is not higher than the rated lifting capacity of the portal crane. Specifically, in a plurality of modules into which the blast furnace shell is divided, each module includes a plurality of rings of furnace shells, a plurality of modules can be simultaneously constructed on the ground, and the steel structure can be constructed as one module or a plurality of modules according to weight. The split-module construction can be used for assembling and welding operation on the ground, and a plurality of modules can be constructed simultaneously, so that the risk of high-altitude operation is reduced, and the construction efficiency of the blast furnace construction is improved.
And a step S4 of hoisting and installing the blast furnace in modules, namely, hoisting the built blast furnace modules to the installation position in sequence by using a gantry crane, and splicing and installing the blast furnace modules.
In the step, when the blast furnace shell module is lifted, four lifting lugs are uniformly arranged on the outer wall of the uppermost furnace shell of the blast furnace shell module along the circumferential direction of the furnace shell, four equal-length lifting ropes are connected at the suspension points of the portal crane, and the lower ends of the lifting ropes are respectively connected to the four lifting lugs for lifting.
In order to prevent the furnace shell from deforming due to the horizontal force during hoisting of the uppermost furnace shell of the blast furnace shell module during hoisting, a cross-shaped support is arranged in the furnace shell, the end of the cross-shaped support abuts against the inner wall of the furnace shell and corresponds to the position of the lifting lug, the cross-shaped support can be made of H-shaped steel or channel steel, the end of the cross-shaped support is connected with the inner wall of the furnace shell in a spot welding manner, and the furnace shell is convenient to dismount after hoisting is finished.
In conclusion, according to the method for constructing the super-huge blast furnace, the portal crane is arranged on one side of the blast furnace construction position, the lifting operation place can be flexibly changed, the influence of field conditions is small, the single maximum lifting weight is large, the blast furnace can be integrally lifted after being constructed in modules on the ground, the high-altitude operation amount is reduced, and the working efficiency and the safety during operation are improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. A method for constructing an oversize blast furnace is characterized by comprising the following steps:
a step of installing a portal crane, which is to install the portal crane on one side of the blast furnace building position;
debugging and trial hoisting the gantry crane, debugging the mounted gantry crane, performing trial hoisting after debugging, and checking whether the rigidity and strength of a main stress structure of the crane meet the requirements or not;
a step of building the blast furnace in modules, namely building a furnace shell and a steel structure of the blast furnace in modules;
and a step of hoisting and mounting the blast furnace in modules, namely hoisting the built blast furnace modules to a mounting position in sequence by using a portal crane, and splicing and mounting.
2. The method of constructing an oversized blast furnace according to claim 1, wherein the gantry crane installing step comprises:
step S11, paving a track;
step S12, mounting the door frame on the track;
step S13, mounting the machine platform on the top of the door frame;
step S14, mounting the main and auxiliary arms of the gantry crane;
and step S15, installing a power device and an electric control system of the gantry crane.
3. The method for constructing the oversized blast furnace according to claim 2, wherein in the step S11, the tracks of the portal crane are divided into two groups, each group of tracks comprises two single tracks, a ballast layer is laid below each group of tracks, a plurality of sleepers are laid on the ballast layer, and the two single tracks of each group of tracks are fixed on the sleepers;
when the two groups of tracks are installed, the position of the central line of the other group of tracks is determined by taking the central line of one group of tracks as a reference and combining the track gauge.
4. The method for constructing an oversized blast furnace according to claim 2, wherein the gantry and the machine platform are installed by using a truck crane and a crawler crane for double-point hoisting.
5. The method for constructing an oversized blast furnace as claimed in claim 2, wherein in step S14, when the main and sub-arms of the gantry crane are installed, one end of the main arm is connected to the machine platform, a support having the same height as the machine platform is provided at one side of the gantry, the other end of the main arm is supported by the support, and then the sub-arm is installed on the main arm.
6. The method for constructing an oversized blast furnace according to claim 1, wherein the step of debugging and trial hoisting the portal crane further comprises:
the method comprises the steps of no-load testing, namely testing the actions of each mechanism of the gantry crane respectively, checking the action correctness of each electrical control loop and the action accuracy of each mechanism, and adjusting each safety limiting device;
a static load test step, namely respectively carrying out 100% static load test and 125% static load test according to test run requirements so as to verify the strength, rigidity and braking reliability of steel structures and mechanisms of all parts and the static stability of the whole machine;
the dynamic load test step, namely hoisting rated loads corresponding to various amplitudes, enabling various mechanisms to rotate in turn, measuring data such as power, speed, motor temperature rise and the like of the various mechanisms, and verifying the dynamic stability of the crane; and hoisting test loads which are 1.1 times of rated loads of all amplitudes, and enabling all mechanisms to rotate in turn.
7. The method of constructing an oversized blast furnace according to claim 6, wherein the step of static load test further comprises:
loading 1 time of rated load to perform 100% static load test, suspending for ten minutes after loading and leaving the ground 100-200 mm, and doing no other actions except for lifting the low-speed gear for the car;
after the 100% static load test is finished, loading to 1.25 times of the rated load without impact, carrying out 125% static load test, suspending for ten minutes, checking that the main steel structural member of the crane does not have permanent deformation, the rotary part and the supporting roller do not have the phenomenon of separation, visually checking that no crack, paint peeling or other damage is seen, the joint does not have looseness or damage, and checking the static stability of the whole machine.
8. The method of constructing an oversized blast furnace according to claim 6, wherein the dynamic load test step further comprises:
the hoisting mechanism tests, the hoisting mechanism is hoisted and descended for three times respectively at a stable working speed, the hoisting brake is required to be stable, the hook slipping phenomenon cannot occur in the descending brake, and the overload test only performs one cycle;
the test of the swing mechanism, the swing mechanism rotates 360 degrees clockwise and anticlockwise at rated rotation speed, the starting and braking are required to be stable, the starting and braking time is more than 5 seconds, and sudden reverse action cannot be realized;
the walking mechanism tests, the walking mechanism lifts the test load to move back and forth for three times respectively with 400 mm-600 mm above the ground, and the overload test only makes one cycle;
and (4) linkage test, namely performing linkage test of the lifting mechanism and the rotating mechanism after the lifting mechanism test, the rotating mechanism test and the traveling mechanism test are completed, or performing linkage test of the lifting mechanism and the traveling mechanism three times respectively.
9. The method for constructing an oversized blast furnace according to claim 1, wherein in the step of constructing the blast furnace in modules, the furnace shell and the steel structure of the blast furnace are divided into a plurality of modules according to the rated lifting capacity of the portal crane, and the weight of each module is not higher than the rated lifting capacity of the portal crane.
10. The method for constructing the oversized blast furnace according to claim 9, wherein when the blast furnace shell module is hoisted, four lifting lugs are uniformly arranged on the outer wall of the uppermost furnace shell of the blast furnace shell module along the circumferential direction of the furnace shell, four slings with equal length are connected to the suspension points of the portal crane, and the lower ends of the slings are respectively connected to the four lifting lugs for hoisting.
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| CN114955887A (en) * | 2022-06-17 | 2022-08-30 | 沪东中华造船(集团)有限公司 | Method for installing portal crane on ship |
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| CN105645278A (en) * | 2016-03-31 | 2016-06-08 | 中冶建工集团有限公司 | Method for mounting crawler cranes in side slope sites |
| CN112249899A (en) * | 2020-10-10 | 2021-01-22 | 山西省工业设备安装集团有限公司 | Special construction process for installing gantry of stacker-reclaimer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114955887A (en) * | 2022-06-17 | 2022-08-30 | 沪东中华造船(集团)有限公司 | Method for installing portal crane on ship |
| CN114955887B (en) * | 2022-06-17 | 2024-06-11 | 沪东中华造船(集团)有限公司 | Method for installing portal crane on ship |
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| CN113896089B (en) | 2023-06-20 |
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