CN110589526A - Safe unloading method for integral cold box of large air separation device - Google Patents
Safe unloading method for integral cold box of large air separation device Download PDFInfo
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- CN110589526A CN110589526A CN201910820023.XA CN201910820023A CN110589526A CN 110589526 A CN110589526 A CN 110589526A CN 201910820023 A CN201910820023 A CN 201910820023A CN 110589526 A CN110589526 A CN 110589526A
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- Prior art keywords
- cold box
- support
- integral
- integral cold
- foundation
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/12—Supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/24—Unloading land vehicles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
Abstract
The invention relates to the field of transportation and storage of large-scale equipment, in particular to a safe unloading method for an integral cold box of a large-scale air separation plant; the method is characterized in that: the method comprises the steps of 1, surveying on site and determining a scheme; step 2, leveling the foundation of the integral cold box storage area; step 3, positioning and paying off a support point, and observing foundation prepressing; step 4, placing the cold box storage support in place; step 5, unloading and leveling the integral cold box; step 6, installing the simple settlement monitoring device; and 7, monitoring and adjusting process settlement. The invention aims to adjust the overall balance of the integral cold box through the special storage support for the integral cold box, reduce the requirement on the foundation load force of the support through the stress conduction of the support, constantly master the balance state of the integral cold box during storage by matching with a simple settlement monitoring device consisting of a measuring tape and a weight block, and ensure the storage safety of the large-scale integral cold box.
Description
Technical Field
The invention relates to the field of transportation and storage of large-scale equipment, in particular to a safe unloading method for an integral cold box of a large-scale air separation plant.
Background
Improper stress of the large integral skid-mounted cold box in the processes of unloading, storing and transporting can cause deformation of an external structure or internal equipment of the cold box, if the stress is light, normal use of the cold box is influenced, and if the stress is heavy, local overload of the structure can be caused, so that safety accidents occur; meanwhile, the integral cold box is stored on a plurality of independent supports, so that once uneven settlement is generated due to uneven stress of the supports, the cold box is inclined and even collapsed, and irreparable loss is generated on the installation site.
Disclosure of Invention
The invention aims to overcome the defects and provide an unloading method with high safety.
In order to achieve the above object, the present invention is realized by:
a safe unloading method for an integral cold box of a large air separation plant comprises
Step 1, performing on-site investigation and determining a scheme;
step 2, leveling the foundation of the integral cold box storage area;
step 3, positioning and paying off a support point, and observing foundation prepressing;
step 4, placing the cold box storage support in place;
step 5, unloading and leveling the integral cold box;
step 6, installing the simple settlement monitoring device;
step 7, monitoring and adjusting process settlement;
wherein the content of the first and second substances,
the on-site investigation and determination scheme of the step 1 is that an integral cold box unloading and storing area is determined by on-site measurement, analysis and comparison and comprehensive consideration in aspects of integral cold box unloading, storing, hoisting and the like;
step 2, leveling the foundation of the integral cold box storage area, namely, after an original soil layer is leveled and compacted, vibrating and compacting the original soil layer by adopting a 26t press machine, ensuring that the compaction coefficient reaches above 0.94, filling crushed stones of 0.35m into a local area, and meeting the requirement of the flatness of the foundation of the integral cold box storage area to reach above 5 mm;
step 3, positioning and paying off the support points, wherein foundation preloading observation refers to paying off and calibrating the support position of each cold box in the leveled integral cold box storage area, preloading is carried out for 24 hours by adopting a crane counterweight, and replacement and compaction are carried out again on the support foundation with large settlement deviation;
step 4, the cold box storage support is in place, namely the cold box storage support is placed according to a calibration position, and the elevation error of each group of supports is not more than 2 mm; the cold box storage support is divided into a base and an adjusting screw, wherein the base can ensure that the transport vehicle can freely enter and exit before and after unloading, and simultaneously the force transmitted to the support by the whole cold box is dispersed to the whole support bottom plate through the supporting structure, so that the load requirement of the foundation of the support point is reduced;
step 5, unloading and leveling the integral cold box, namely lifting the integral cold box to a designated height through a hydraulic jacking device after the integral cold box is transported to a storage site, placing a prepared cold box support below a cold box supporting point nearby by a coordinating person, and adjusting the height of each support through the upper part of each support to balance the stress of each support;
step 6, the simple settlement monitoring device is installed, after the integral cold box is stably stored, six prefabricated tape measure clamping seats are fixed on structural beams at the bottom of the two sides of the integral cold box, the tape measures are placed in the clamping seats, weight blocks placed on the ground are vertically elongated downwards by tape measure strips, and reading of the bottom edge of the cold box beam is recorded; when the integral cold box is settled, the spring force of the tape measure can synchronously drive the tape measure to recover, so that the settlement value is recorded;
and 7, the process settlement monitoring and adjusting means that the reading of the tape measure strip is observed at regular time during the storage period of the cold box, and the recorded time is written on the cold box wall plate of the corresponding observation point so as to be convenient for checking at any time, and once continuous settlement and settlement deviation occur, the whole cold box is kept horizontal in a mode of increasing a support or adjusting the top spiral of the support.
The invention aims to adjust the overall balance of the integral cold box through the special storage support for the integral cold box, reduce the requirement on the foundation load force of the support through the stress conduction of the support, constantly master the balance state of the integral cold box during storage by matching with a simple settlement monitoring device consisting of a measuring tape and a weight block, and ensure the storage safety of the large-scale integral cold box.
Detailed Description
The invention is further illustrated by the following specific examples.
A safe unloading method for an integral cold box of a large air separation plant comprises
Step 1, performing on-site investigation and determining a scheme;
step 2, leveling the foundation of the integral cold box storage area;
step 3, positioning and paying off a support point, and observing foundation prepressing;
step 4, placing the cold box storage support in place;
step 5, unloading and leveling the integral cold box;
step 6, installing the simple settlement monitoring device;
step 7, monitoring and adjusting process settlement;
wherein the content of the first and second substances,
the on-site investigation and determination scheme of the step 1 is that an integral cold box unloading and storing area is determined by on-site measurement, analysis and comparison and comprehensive consideration in aspects of integral cold box unloading, storing, hoisting and the like;
step 2, leveling the foundation of the integral cold box storage area, namely, after an original soil layer is leveled and compacted, vibrating and compacting the original soil layer by adopting a 26t press machine, ensuring that the compaction coefficient reaches above 0.94, filling crushed stones of 0.35m into a local area, and meeting the requirement of the flatness of the foundation of the integral cold box storage area to reach above 5 mm;
step 3, positioning and paying off the support points, wherein foundation preloading observation refers to paying off and calibrating the support position of each cold box in the leveled integral cold box storage area, preloading is carried out for 24 hours by adopting a crane counterweight, and replacement and compaction are carried out again on the support foundation with large settlement deviation;
step 4, the cold box storage support is in place, namely the cold box storage support is placed according to a calibration position, and the elevation error of each group of supports is not more than 2 mm; the cold box storage support is divided into a base and an adjusting screw, wherein the base can ensure that the transport vehicle can freely enter and exit before and after unloading, and simultaneously the force transmitted to the support by the whole cold box is dispersed to the whole support bottom plate through the supporting structure, so that the load requirement of the foundation of the support point is reduced;
step 5, unloading and leveling the integral cold box, namely lifting the integral cold box to a designated height through a hydraulic jacking device after the integral cold box is transported to a storage site, placing a prepared cold box support below a cold box supporting point nearby by a coordinating person, and adjusting the height of each support through the upper part of each support to balance the stress of each support;
step 6, the simple settlement monitoring device is installed, after the integral cold box is stably stored, six prefabricated tape measure clamping seats are fixed on structural beams at the bottom of the two sides of the integral cold box, the tape measures are placed in the clamping seats, weight blocks placed on the ground are vertically elongated downwards by tape measure strips, and reading of the bottom edge of the cold box beam is recorded; when the integral cold box is settled, the spring force of the tape measure can synchronously drive the tape measure to recover, so that the settlement value is recorded;
and 7, the process settlement monitoring and adjusting means that the reading of the tape measure strip is observed at regular time during the storage period of the cold box, and the recorded time is written on the cold box wall plate of the corresponding observation point so as to be convenient for checking at any time, and once continuous settlement and settlement deviation occur, the whole cold box is kept horizontal in a mode of increasing a support or adjusting the top spiral of the support.
The invention aims to adjust the overall balance of the integral cold box through the special storage support for the integral cold box, reduce the requirement on the foundation load force of the support through the stress conduction of the support, constantly master the balance state of the integral cold box during storage by matching with a simple settlement monitoring device consisting of a measuring tape and a weight block, and ensure the storage safety of the large-scale integral cold box.
Claims (1)
1. A safe unloading method for an integral cold box of a large air separation device is characterized by comprising the following steps: comprises that
Step 1, performing on-site investigation and determining a scheme;
step 2, leveling the foundation of the integral cold box storage area;
step 3, positioning and paying off a support point, and observing foundation prepressing;
step 4, placing the cold box storage support in place;
step 5, unloading and leveling the integral cold box;
step 6, installing the simple settlement monitoring device;
step 7, monitoring and adjusting process settlement;
wherein the content of the first and second substances,
the on-site investigation and determination scheme of the step 1 is that an integral cold box unloading and storing area is determined by on-site measurement, analysis and comparison and comprehensive consideration in aspects of integral cold box unloading, storing, hoisting and the like;
step 2, leveling the foundation of the integral cold box storage area, namely, after an original soil layer is leveled and compacted, vibrating and compacting the original soil layer by adopting a 26t press machine, ensuring that the compaction coefficient reaches above 0.94, filling crushed stones of 0.35m into a local area, and meeting the requirement of the flatness of the foundation of the integral cold box storage area to reach above 5 mm;
step 3, positioning and paying off the support points, wherein foundation preloading observation refers to paying off and calibrating the support position of each cold box in the leveled integral cold box storage area, preloading is carried out for 24 hours by adopting a crane counterweight, and replacement and compaction are carried out again on the support foundation with large settlement deviation;
step 4, the cold box storage support is in place, namely the cold box storage support is placed according to a calibration position, and the elevation error of each group of supports is not more than 2 mm; the cold box storage support is divided into a base and an adjusting screw, wherein the base can ensure that the transport vehicle can freely enter and exit before and after unloading, and simultaneously the force transmitted to the support by the whole cold box is dispersed to the whole support bottom plate through the supporting structure, so that the load requirement of the foundation of the support point is reduced;
step 5, unloading and leveling the integral cold box, namely lifting the integral cold box to a designated height through a hydraulic jacking device after the integral cold box is transported to a storage site, placing a prepared cold box support below a cold box supporting point nearby by a coordinating person, and adjusting the height of each support through the upper part of each support to balance the stress of each support;
step 6, the simple settlement monitoring device is installed, after the integral cold box is stably stored, six prefabricated tape measure clamping seats are fixed on structural beams at the bottom of the two sides of the integral cold box, the tape measures are placed in the clamping seats, weight blocks placed on the ground are vertically elongated downwards by tape measure strips, and reading of the bottom edge of the cold box beam is recorded; when the integral cold box is settled, the spring force of the tape measure can synchronously drive the tape measure to recover, so that the settlement value is recorded;
and 7, the process settlement monitoring and adjusting means that the reading of the tape measure strip is observed at regular time during the storage period of the cold box, and the recorded time is written on the cold box wall plate of the corresponding observation point so as to be convenient for checking at any time, and once continuous settlement and settlement deviation occur, the whole cold box is kept horizontal in a mode of increasing a support or adjusting the top spiral of the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910820023.XA CN110589526A (en) | 2019-08-31 | 2019-08-31 | Safe unloading method for integral cold box of large air separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910820023.XA CN110589526A (en) | 2019-08-31 | 2019-08-31 | Safe unloading method for integral cold box of large air separation device |
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| CN110589526A true CN110589526A (en) | 2019-12-20 |
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| CN201910820023.XA Pending CN110589526A (en) | 2019-08-31 | 2019-08-31 | Safe unloading method for integral cold box of large air separation device |
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Citations (9)
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| DE10322883A1 (en) * | 2002-05-30 | 2003-12-11 | Lodewijk Karel Druyts | Device for loading and unloading a freight container from a truck places four height adjustable supports at the corners of the container |
| CN203349814U (en) * | 2013-05-23 | 2013-12-18 | 国家电网公司 | Auxiliary settlement observation device |
| CN104785904A (en) * | 2015-04-01 | 2015-07-22 | 中石化工建设有限公司 | Technology for installing pre-buried bolts to large-scale air separation device cold box |
| CN105452583A (en) * | 2013-05-24 | 2016-03-30 | 乔治洛德方法研究和开发液化空气有限公司 | Manufacturing yard |
| CN106049407A (en) * | 2016-06-25 | 2016-10-26 | 中国水利水电第四工程局有限公司 | Foundation dynamic compaction construction method |
| KR20170104184A (en) * | 2016-03-07 | 2017-09-15 | 황경율 | Level control device for container |
| CN109322250A (en) * | 2018-11-30 | 2019-02-12 | 中国二十冶集团有限公司 | The fast adjustment method of pre-pressing bracket sedimentation absolute altitude |
| CN109720976A (en) * | 2018-12-28 | 2019-05-07 | 上海二十冶建设有限公司 | The installation method of overall skid-mounted formula ice chest in Large Air Separation Devices engineering |
| CN109958148A (en) * | 2019-03-27 | 2019-07-02 | 中国化学工程第三建设有限公司 | The levelling method of cold box foundation bottom plate centering |
-
2019
- 2019-08-31 CN CN201910820023.XA patent/CN110589526A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10322883A1 (en) * | 2002-05-30 | 2003-12-11 | Lodewijk Karel Druyts | Device for loading and unloading a freight container from a truck places four height adjustable supports at the corners of the container |
| CN203349814U (en) * | 2013-05-23 | 2013-12-18 | 国家电网公司 | Auxiliary settlement observation device |
| CN105452583A (en) * | 2013-05-24 | 2016-03-30 | 乔治洛德方法研究和开发液化空气有限公司 | Manufacturing yard |
| US9302798B2 (en) * | 2013-05-24 | 2016-04-05 | L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude | Method for building air separating units in a remote manufacturing yard |
| CN104785904A (en) * | 2015-04-01 | 2015-07-22 | 中石化工建设有限公司 | Technology for installing pre-buried bolts to large-scale air separation device cold box |
| KR20170104184A (en) * | 2016-03-07 | 2017-09-15 | 황경율 | Level control device for container |
| CN106049407A (en) * | 2016-06-25 | 2016-10-26 | 中国水利水电第四工程局有限公司 | Foundation dynamic compaction construction method |
| CN109322250A (en) * | 2018-11-30 | 2019-02-12 | 中国二十冶集团有限公司 | The fast adjustment method of pre-pressing bracket sedimentation absolute altitude |
| CN109720976A (en) * | 2018-12-28 | 2019-05-07 | 上海二十冶建设有限公司 | The installation method of overall skid-mounted formula ice chest in Large Air Separation Devices engineering |
| CN109958148A (en) * | 2019-03-27 | 2019-07-02 | 中国化学工程第三建设有限公司 | The levelling method of cold box foundation bottom plate centering |
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Application publication date: 20191220 |
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