CN104785904A - Technology for installing pre-buried bolts to large-scale air separation device cold box - Google Patents
Technology for installing pre-buried bolts to large-scale air separation device cold box Download PDFInfo
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- CN104785904A CN104785904A CN201510150608.7A CN201510150608A CN104785904A CN 104785904 A CN104785904 A CN 104785904A CN 201510150608 A CN201510150608 A CN 201510150608A CN 104785904 A CN104785904 A CN 104785904A
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- channel steel
- embedded bolt
- upright post
- ice chest
- welding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/022—Welding by making use of electrode vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a technology for installing pre-buried bolts to a large-scale air separation device cold box. The method comprises the following steps that 1, a foundation steel plate is pre-buried in a cushion layer of the air separation device cold box; 2, a support used for installing the pre-buried bolts is built on the foundation steel plate; 3, the pre-buried bolts are installed, wherein multiple distance formworks are fabricated, a first position point used for installing the corresponding pre-buried bolt is determined on any distance formwork, any distance formwork is welded to the upper end face of a box iron cross beam through angle iron, a through hole which penetrates through the box iron cross beam and is matched with the corresponding pre-buried bolt is formed in the first position point, and the corresponding pre-buried bolt is installed in the through hole; 4, welding seams are detected. According to the technology, the support is welded inside the large-scale air separation device cold box, the pre-buried bolts are installed on the box iron cross beams of the support, the support is utilized for achieving the overall support and reinforcement, and the installation of the pre-buried bolts is completed.
Description
Technical field
The invention belongs to pre-embedded bolt installing area, particularly large-scale space division device ice chest pre-embedded bolt mounting process.
Background technology
The ice chest of air separation unit is basis important in air separation unit, and ice chest is generally based on reinforced concrete soil padding.In large-scale space division device ice chest, install pre-embedded bolt have larger difficulty, reason is as follows: 1, the basis volume of bed course is large, and concrete requires that one-time-concreting completes; 2, cold box foundation has higher requirement to freeze proof and anti-permeability performance; 3, the equipment pre-embedded bolt in cold box foundation is group bolt, needs integral reinforcing; 4, there is a large amount of pre-embedded bolt in cold box foundation, be in vacant state.
Summary of the invention
In order to solve the problem, the invention provides a kind of large-scale space division device ice chest pre-embedded bolt mounting process, it comprises:
Step one, on the bed course of air separation unit ice chest embedded foundation steel plate:
(1) on described bed course, the position of described base steel plates is determined according to the installation site of described pre-embedded bolt, the described base steel plates that pre-buried two row are parallel on described position;
(2) anchoring into expansion bolt is fixed on described bed course by arbitrary described base steel plates;
Step 2, in described base steel plates, build support for installing described pre-embedded bolt:
(1) pretreatment: removing welding rod or the greasy dirt of welding wire surface and oxide layer, and keep described welding rod or welding wire surface clean;
(2) pillar of described support is installed:
Get some channel steel upright posts, grinding process is carried out to the upper surface of described channel steel upright post lower surface and described base steel plates, and removes the greasy dirt of the upper surface of described channel steel upright post lower surface and described base steel plates with organic solvent;
Adopt GTAW connection technology, described channel steel upright post lower surface is soldered to the upper surface of described base steel plates, makes described channel steel upright post two row parallel arrangement;
(3) on the top of described pillar, beam structure is installed:
Utilize electronic or pneumatic milling cutter respectively to offer a corresponding groove on the top of any two relative described channel steel upright posts, and flat smooth process is carried out to described groove place, make its impulse-free robustness and overlap;
Get some channel steel cross beams, arbitrary described crossbeam inserts any two corresponding described grooves;
Grip described channel steel upright post and described channel steel cross beam, preheating is carried out to the interface that described channel steel upright post welds with described channel steel cross beam, make arbitrary described interface temperature reach about 100 DEG C;
Keep described channel steel upright post and described channel steel cross beam butt welding face level, adopt described GTAW connection technology to weld;
Step 3, described pre-embedded bolt is installed:
(1) make some spacing templates, and determine first site of installing described pre-embedded bolt in arbitrary described spacing template;
(2) angle steel is respectively welded in the both sides that arbitrary described spacing template is parallel with described channel steel upright post,
(3) determine second site of installing described pre-embedded bolt in described channel steel cross beam upper surface, described angle steel is welded on the upper surface of described channel steel cross beam, and described first site is overlapped with described second site;
(4) through hole mated with described pre-embedded bolt running through described channel steel cross beam is offered in described first site;
(5) described pre-embedded bolt is mounted to described through hole;
Step 4, welding gap detection.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the step of an installation skewed horizontal load bar between described step 3 and described step 4, is also comprised;
Described skewed horizontal load bar is oblique to be soldered between wantonly one or two adjacent described channel steel upright post; An end points of described skewed horizontal load bar is soldered to the upper end of channel steel upright post described in one of them, and another end points of described skewed horizontal load bar is soldered to the lower end of channel steel upright post described in another.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the concrete steps of described step 4 comprise:
By weld edge rounding off on parent material, and detect face of weld, make described face of weld must not there is crackle, lack of penetration, incomplete fusion and welded tumour defects;
Detect the undercut degree of depth, make the described undercut degree of depth be not more than 0.5mm, undercut total length in weld seam both sides is no more than 20% of weld seam total length;
100%RT checks, RT must not lower than JB/T4730-2005-II grade standard;
The dye penetrant inspection of 100%RT angle welding.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, described GTAW connects technological parameter and is: gage of wire 4 ~ 5mm, tungsten filament diameter 5mm, welding current 180 ~ 260A, argon flow amount 20L/min, nozzle bore 12 ~ 14mm.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the purity of described argon gas should be not less than 99.99%.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, in described GTAW termination process, the teeter of welding wire is no more than 3 times of its diameter.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the greasy dirt and the oxide layer concrete operations that remove welding rod or welding wire surface in described step 2 are:
Trichloro-ethylene organic solvent is utilized to remove described welding rod or welding wire surface greasy dirt;
Use the NaOH solution of 5%-10%, at temperature is 70 DEG C, soaks 30-60 second, removes the oxide layer of described welding rod or welding wire.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, arbitrary described base pre-buried plinth steel plate welds an A-frame with the corner that described channel steel upright post is formed.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, described channel steel upright post and described channel steel cross beam adopt 10# channel-section steel.
The present invention at least comprises following beneficial effect:
1, by building support on the bed course of air separation unit ice chest, the beam structure of support installs pre-embedded bolt, and the pre-embedded bolt realizing air separation unit ice chest is in vacant state;
2, air separation unit ice chest temperature in operation process is lower, for improving welding quality, extending the service life of low temperature lower carriage and pre-embedded bolt, carrying out pretreatment, to improve welding quality before welding to the interface welded, welding rod or welding wire.
3, after welding support, weld is detected, ensure that face of weld must not exist crackle, lack of penetration, incomplete fusion and welded tumour defects; Detect the occlusion degree of depth; 100%RT checks, and the dye penetrant inspection of 100%RT angle welding.
4, in order to ensure the stability of support, between any two channel steel upright posts, welding skewed horizontal load bar, improving the enabling capabilities of channel steel upright post.
5, according to construction demand, work out the installation planning of pre-embedded bolt, and manufacture some spacing templates according to installation planning, weld spacing template by the crossbeam at support specially position thus determine the installation site of pre-embedded bolt.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the flow chart of large-scale space division device ice chest pre-embedded bolt mounting process of the present invention;
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to description word to make those skilled in the art.
The invention discloses a kind of large-scale space division device ice chest pre-embedded bolt mounting process, as shown in Figure 1, at least comprise the steps:
Step one, on the bed course of air separation unit ice chest embedded foundation steel plate:
(1) on described bed course, the position of described base steel plates is determined according to the installation site of described pre-embedded bolt, the described base steel plates that pre-buried two row are parallel on described position;
(2) anchoring into expansion bolt is fixed on described bed course by arbitrary described base steel plates;
The basis volume of the bed course of air separation unit ice chest is large, and concrete requires that one-time-concreting completes, therefore when casting concrete, and the pre-buried base steel plates for installing pre-embedded bolt support on the bed course of air separation unit ice chest;
Step 2, in described base steel plates, build support for installing described pre-embedded bolt:
(1) pretreatment: removing welding rod or the greasy dirt of welding wire surface and oxide layer, and keep described welding rod or welding wire surface clean; Remove the dirt of welding rod or welding wire surface, greasy dirt and oxide layer, effectively improve welding quality, increase the service life;
(2) pillar of described support is installed:
Get some channel steel upright posts, grinding process is carried out to the upper surface of described channel steel upright post lower surface and described base steel plates, and removes the greasy dirt of the upper surface of described channel steel upright post lower surface and described base steel plates with organic solvent;
Adopt GTAW connection technology, described channel steel upright post lower surface is soldered to the upper surface of described base steel plates, makes described channel steel upright post two row parallel arrangement;
(3) on the top of described pillar, beam structure is installed:
Utilize electronic or pneumatic milling cutter respectively to offer a corresponding groove on the top of any two relative described channel steel upright posts, and flat smooth process is carried out to described groove place, make its impulse-free robustness and overlap;
Get some channel steel cross beams, arbitrary described crossbeam inserts any two corresponding described grooves;
Grip described channel steel upright post and described channel steel cross beam, preheating is carried out to the interface that described channel steel upright post welds with described channel steel cross beam, make arbitrary described interface temperature reach about 100 DEG C;
Keep described channel steel upright post and described channel steel cross beam butt welding face level, adopt described GTAW connection technology to weld;
The basis of described base steel plates is welded a support, and described support comprises channel steel upright post and channel steel cross beam; The interface of described channel steel upright post and channel steel cross beam carries out pretreatment before welding, and adopts GTAW connection technology to weld, and makes described support more firm and in low temperature environment, extends its service life;
Step 3, described pre-embedded bolt is installed:
(1) make some spacing templates, and determine first site of installing described pre-embedded bolt in arbitrary described spacing template;
(2) angle steel is respectively welded in the both sides that arbitrary described spacing template is parallel with described channel steel upright post,
(3) determine second site of installing described pre-embedded bolt in described channel steel cross beam upper surface, described angle steel is welded on the upper surface of described channel steel cross beam, and described first site is overlapped with described second site;
(4) through hole mated with described pre-embedded bolt running through described channel steel cross beam is offered in described first site;
(5) described pre-embedded bolt is mounted to described through hole;
The channel-section steel that described pre-embedded bolt is arranged on described support by spacing module is weighed, and the particular location of described spacing module will be determined according to the pre-embedded steel slab in engineering reality, built-in pipe, preformed hole etc.;
Step 4, welding gap detection:
By weld edge rounding off on parent material, and detect face of weld, make described face of weld must not there is crackle, lack of penetration, incomplete fusion and welded tumour defects;
Detect the undercut degree of depth, make the described undercut degree of depth be not more than 0.5mm, undercut total length in weld seam both sides is no more than 20% of weld seam total length;
100%RT checks, RT must not lower than JB/T4730-2005-II grade standard;
The dye penetrant inspection of 100%RT angle welding, carries out visual examination to face of weld after welding, and weld seam carries out Non-Destructive Testing.
In described large-scale space division device ice chest pre-embedded bolt mounting process, between described step 3 and described step 4, also comprise the step of an installation skewed horizontal load bar;
Described skewed horizontal load bar is oblique to be soldered between wantonly one or two adjacent described channel steel upright post; An end points of described skewed horizontal load bar is soldered to the upper end of channel steel upright post described in one of them, and another end points of described skewed horizontal load bar is soldered to the lower end of channel steel upright post described in another.
In order to improve the enabling capabilities of support, welding a skewed horizontal load bar between one or two adjacent described channel steel upright post in office, the enabling capabilities of described channel steel upright post can be improved, the stability of channel steel upright post can be improved again.
In described large-scale space division device ice chest pre-embedded bolt mounting process, described GTAW connects technological parameter and is: gage of wire 4 ~ 5mm, tungsten filament diameter 5mm, welding current 180 ~ 260A, argon flow amount 20L/min, nozzle bore 12 ~ 14mm; The purity of described argon gas should be not less than 99.99%; And in described GTAW termination process, the teeter of welding wire is no more than 3 times of its diameter.
Adopt GTAW to connect technique tool to have the following advantages: protected effect is good, weldquality is high, and argon gas does not send with metal and reacts, and is insoluble to metal, welding process is the simple procedure of metal molten and crystallization substantially, therefore can obtain comparatively pure and that quality is high weld seam; Welding deformation and stress little, because arc is by the compression of argon gas stream and cooling effect, in arc heat quantity set, heat affected area is very narrow, and in low temperature environment, welding deformation is very little; Easy observation, easy to operate; Stable, arc stability, splashes few.
In described large-scale space division device ice chest pre-embedded bolt mounting process, the greasy dirt and the oxide layer concrete operations that remove welding rod or welding wire surface in described step 2 are:
Trichloro-ethylene organic solvent is utilized to remove described welding rod or welding wire surface greasy dirt;
Use the NaOH solution of 5%-10%, at temperature is 70 DEG C, soaks 30-60 second, removes the oxide layer of described welding rod or welding wire.
In described large-scale space division device ice chest pre-embedded bolt mounting process, an A-frame welds in the corner that arbitrary described base steel plates and described channel steel upright post are formed.
In described large-scale space division device ice chest pre-embedded bolt mounting process, described channel steel upright post and described channel steel cross beam adopt 10# channel-section steel.
Although embodiment of the present invention are open as above, but it is not restricted to listed in description and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (9)
1. large-scale space division device ice chest pre-embedded bolt mounting process, is characterized in that, comprising:
Step one, on the bed course of air separation unit ice chest embedded foundation steel plate:
(1) on described bed course, the position of described base steel plates is determined according to the installation site of described pre-embedded bolt, the described base steel plates that pre-buried two row are parallel on described position;
(2) anchoring into expansion bolt is fixed on described bed course by arbitrary described base steel plates;
Step 2, in described base steel plates, build support for installing described pre-embedded bolt:
(1) pretreatment: removing welding rod or the greasy dirt of welding wire surface and oxide layer, and keep described welding rod or welding wire surface clean;
(2) pillar of described support is installed:
Get some channel steel upright posts, grinding process is carried out to the upper surface of described channel steel upright post lower surface and described base steel plates, and removes the greasy dirt of the upper surface of described channel steel upright post lower surface and described base steel plates with organic solvent;
Adopt GTAW connection technology, described channel steel upright post lower surface is soldered to the upper surface of described base steel plates, makes described channel steel upright post two row parallel arrangement;
(3) on the top of described pillar, beam structure is installed:
Utilize electronic or pneumatic milling cutter respectively to offer a corresponding groove on the top of any two relative described channel steel upright posts, and flat smooth process is carried out to described groove place, make its impulse-free robustness and overlap;
Get some channel steel cross beams, arbitrary described crossbeam inserts any two corresponding described grooves;
Grip described channel steel upright post and described channel steel cross beam, preheating is carried out to the interface that described channel steel upright post welds with described channel steel cross beam, make arbitrary described interface temperature reach about 100 DEG C;
Keep described channel steel upright post and described channel steel cross beam butt welding face level, adopt described GTAW connection technology to weld;
Step 3, described pre-embedded bolt is installed:
(1) make some spacing templates, and determine first site of installing described pre-embedded bolt in arbitrary described spacing template;
(2) angle steel is respectively welded in the both sides that arbitrary described spacing template is parallel with described channel steel upright post,
(3) determine second site of installing described pre-embedded bolt in described channel steel cross beam upper surface, described angle steel is welded on the upper surface of described channel steel cross beam, and described first site is overlapped with described second site;
(4) through hole mated with described pre-embedded bolt running through described channel steel cross beam is offered in described first site;
(5) described pre-embedded bolt is mounted to described through hole;
Step 4, welding gap detection.
2. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 1, is characterized in that, also comprise the step of an installation skewed horizontal load bar between described step 3 and described step 4;
Described skewed horizontal load bar is oblique to be soldered between any two adjacent described channel steel upright posts; An end points of described skewed horizontal load bar is soldered to the upper end of channel steel upright post described in one of them, and another end points of described skewed horizontal load bar is soldered to the lower end of channel steel upright post described in another.
3. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 2, it is characterized in that, the concrete steps of described step 4 comprise:
By weld edge rounding off on parent material, and detect face of weld, make described face of weld must not there is crackle, lack of penetration, incomplete fusion and welded tumour defects;
Detect the undercut degree of depth, make the described undercut degree of depth be not more than 0.5mm, undercut total length in weld seam both sides is no more than 20% of weld seam total length;
100%RT checks, RT must not lower than JB/T4730-2005-II grade standard;
The dye penetrant inspection of 100%RT angle welding.
4. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 3, it is characterized in that, described GTAW connects technological parameter and is: gage of wire 4 ~ 5mm, tungsten filament diameter 5mm, welding current 180 ~ 260A, argon flow amount 20L/min, nozzle bore 12 ~ 14mm.
5. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 4, it is characterized in that, the purity of described argon gas should be not less than 99.99%.
6. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 5, is characterized in that, in described GTAW termination process, the teeter of welding wire is no more than 3 times of its diameter.
7. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 6, it is characterized in that, the greasy dirt and the oxide layer concrete operations that remove welding rod or welding wire surface in described step 2 are:
Trichloro-ethylene organic solvent is utilized to remove described welding rod or welding wire surface greasy dirt;
Use the NaOH solution of 5%-10%, at temperature is 70 DEG C, soaks 30-60 second, removes the oxide layer of described welding rod or welding wire.
8. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 7, it is characterized in that, an A-frame welds in the corner that arbitrary described base steel plates and described channel steel upright post are formed.
9. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 8, is characterized in that, described channel steel upright post and described channel steel cross beam adopt 10# channel-section steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510150608.7A CN104785904B (en) | 2015-04-01 | 2015-04-01 | Technology for installing pre-buried bolts to large-scale air separation device cold box |
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| CN201510150608.7A CN104785904B (en) | 2015-04-01 | 2015-04-01 | Technology for installing pre-buried bolts to large-scale air separation device cold box |
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| CN104785904B CN104785904B (en) | 2017-03-22 |
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| CN110589526A (en) * | 2019-08-31 | 2019-12-20 | 上海二十冶建设有限公司 | Safe unloading method for integral cold box of large air separation device |
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| CN106223358A (en) * | 2016-07-19 | 2016-12-14 | 中国化学工程第三建设有限公司 | A kind of construction method serving as a contrast casing metal sheet cold box foundation |
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| CN107990631B (en) * | 2017-11-28 | 2020-04-17 | 中国化学工程第三建设有限公司 | Naked-cold-free construction method for cold box of large air separation device |
| CN110295620A (en) * | 2019-06-29 | 2019-10-01 | 上海二十冶建设有限公司 | The fast accurate installation method of large-scale space division device overall skid-mounted formula ice chest |
| CN110589526A (en) * | 2019-08-31 | 2019-12-20 | 上海二十冶建设有限公司 | Safe unloading method for integral cold box of large air separation device |
| CN115055965A (en) * | 2022-08-22 | 2022-09-16 | 北京中科富海低温科技有限公司 | Horizontal type cold box assembly system and assembly method thereof |
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| Publication number | Publication date |
|---|---|
| CN104785904B (en) | 2017-03-22 |
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