CN104785904B - 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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- CN104785904B CN104785904B CN201510150608.7A CN201510150608A CN104785904B CN 104785904 B CN104785904 B CN 104785904B CN 201510150608 A CN201510150608 A CN 201510150608A CN 104785904 B CN104785904 B CN 104785904B
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- channel steel
- embedded bolt
- upright post
- welding
- ice chest
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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, more particularly to large-scale space division device ice chest pre-embedded bolt mounting process.
Background technology
The ice chest of air separation unit is important basis in air separation unit, and ice chest is typically with reinforced concrete soil padding as base
Plinth.Pre-embedded bolt is installed in large-scale space division device ice chest there is larger difficulty, reason is as follows：1st, the basis volume of bed course is big,
And concrete requires that one-time-concreting is completed；2nd, cold box foundation has higher requirement to freeze proof and anti-permeability performance；3rd, cold box foundation
In equipment pre-embedded bolt be group bolt, need integral reinforcing；4th, there are a large amount of pre-embedded bolts in cold box foundation, in hanging
State.
The content of the invention
In order to solve the above problems, the invention provides a kind of large-scale space division device ice chest pre-embedded bolt mounting process, its
Including：
Step one, on the bed course of air separation unit ice chest embedded foundation steel plate：
(1) position of the base steel plates is determined on the bed course according to the installation site of the pre-embedded bolt, in institute
Rheme puts the parallel base steel plates of pre-buried two row；
(2) anchor into expansion bolt arbitrary base steel plates are fixed on the bed course；
Step 2, support for installing the pre-embedded bolt is built in the base steel plates：
(1) pretreatment：Greasy dirt and the oxide layer of welding rod or welding wire surface is removed, and keeps the welding rod or welding wire table
Face is clean；
(2) pillar of the support is installed：
Some channel steel upright posts are taken, burnishing part is carried out to the upper surface of the channel steel upright post lower surface and the base steel plates
Reason, and the greasy dirt of the upper surface of the channel steel upright post lower surface and the base steel plates is removed with organic solvent；
Using GTAW connection technology, the channel steel upright post lower surface is soldered to into the upper end of the base steel plates
Face so that two row parallel arrangement of the channel steel upright post；
(3) beam structure is installed on the top of the pillar：
A corresponding slope is opened up using electric and pneumatic milling cutter respectively on the top of any two relative channel steel upright posts
Mouthful, and to carrying out flat smooth process at the groove so as to impulse- free robustness and overlap；
Some channel steel cross beams are taken, arbitrary crossbeam inserts any two corresponding grooves；
The channel steel upright post and the channel steel cross beam is gripped, the channel steel upright post and the channel steel cross beam are welded
Interface is preheated, and makes arbitrary interface temperature reach 100 DEG C or so；
The channel steel upright post and the channel steel cross beam butt welding face level is kept, is connect using the GTAW
Technology is welded；
Step 3, installs the pre-embedded bolt：
(1) some spacing templates are made, and is determined for installing the pre-embedded bolt in arbitrary spacing template
First site；
(2) angle steel is respectively welded in arbitrary spacing template both sides parallel with the channel steel upright post,
(3) the second site for installing the pre-embedded bolt is determined in the channel steel cross beam upper surface, and the angle steel is welded on
On the upper surface of the channel steel cross beam so that first site is overlapped with second site；
(4) through hole matched with the pre-embedded bolt through the channel steel cross beam is opened up in first site；
(5) pre-embedded bolt is attached to into the through hole；
Step 4, welds gap detection.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the step 3 and the step
The step of also installing skewed horizontal load bar including one between rapid four；
The skewed horizontal load bar is oblique to be soldered between the wantonly one or two adjacent channel steel upright post；The skewed horizontal load bar
An end points be soldered to the upper end of one of them channel steel upright post, another end points of the skewed horizontal load bar is soldered to separately
The lower end of one channel steel upright post.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the concrete step of the step 4
Suddenly include：
By on weld edge rounding off to parent material, and face of weld is detected, the face of weld is existed
Crackle, lack of penetration, incomplete fusion and welded tumour defects；
Detection undercut depth so that the undercut depth is not more than 0.5mm, undercut total length in weld seam both sides is less than weld seam
The 20% of total length；
100%RT checks that RT must not be less than JB/T4730-2005-II level standards；
100%RT angle welding dye penetrant inspections.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the GTAW
Connecing technological parameter is：4～5mm of gage of wire, tungsten filament diameter 5mm, 180～260A of welding current, argon flow amount 20L/min, spray
12～14mm of nozzle aperture footpath.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the purity of the argon gas should not
Less than 99.99%.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, in the handwork tungsten electrode argon arc
In welding process, 3 times no more than its diameter of the teeter of welding wire.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, remove in the step 2
The greasy dirt and oxide layer concrete operations of welding rod or welding wire surface be：
The welding rod or welding wire surface greasy dirt are removed using trichloro ethylene organic solvent；
Using the NaOH solution of 5%-10%, it is immersion 30-60 seconds, the removing welding rod or welding wire at 70 DEG C in temperature
Oxide layer.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the pre-buried plinth steel of the arbitrary base
Plate welds an A-frame with the corner that the channel steel upright post is formed.
Preferably, in described large-scale space division device ice chest pre-embedded bolt mounting process, the channel steel upright post and described
Channel steel cross beam adopts 10# channel-section steels.
The present invention at least includes following beneficial effect：
1st, by support being built on the bed course of air separation unit ice chest, pre-embedded bolt is installed on the beam structure of support,
Realize that the pre-embedded bolt of air separation unit ice chest is in vacant state；
2nd, air separation unit ice chest temperature in operation process is relatively low, is to improve welding quality, extends low temperature lower carriage and pre-
The service life of bolt is buried, interface, welding rod or the welding wire to welding is pre-processed before welding, to improve welding quality.
3rd, after welding support, weld is detected, it is ensured that face of weld must not exist crackle, it is lack of penetration, do not melt
Close and welded tumour defects；Detection occlusion depth；100%RT is checked, and 100%RT angle welding dye penetrant inspections.
4th, in order to ensure the stability of support, skewed horizontal load bar is welded between any two channel steel upright post, improve channel-section steel and stand
The enabling capabilities of post.
5th, the installation planning of pre-embedded bolt according to construction demand, is worked out, and some spacing templates is manufactured according to planning is installed,
Spacing template is welded so that it is determined that the installation site of pre-embedded bolt by the crossbeam in support specially position.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the flow chart of large-scale space division device ice chest pre-embedded bolt mounting process of the present invention；
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
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 include as
Lower step：
Step one, on the bed course of air separation unit ice chest embedded foundation steel plate：
(1) position of the base steel plates is determined on the bed course according to the installation site of the pre-embedded bolt, in institute
Rheme puts the parallel base steel plates of pre-buried two row；
(2) anchor into expansion bolt arbitrary base steel plates are fixed on the bed course；
The basis volume of the bed course of air separation unit ice chest is big, and concrete requires that one-time-concreting is completed, therefore is pouring coagulation
When native, the pre-buried base steel plates for installing pre-embedded bolt support on the bed course of air separation unit ice chest；
Step 2, support for installing the pre-embedded bolt is built in the base steel plates：
(1) pretreatment：Greasy dirt and the oxide layer of welding rod or welding wire surface is removed, and keeps the welding rod or welding wire table
Face is clean；Remove dirt, greasy dirt and the oxide layer of welding rod or welding wire surface, effectively improve welding quality, increase the service life；
(2) pillar of the support is installed：
Some channel steel upright posts are taken, burnishing part is carried out to the upper surface of the channel steel upright post lower surface and the base steel plates
Reason, and the greasy dirt of the upper surface of the channel steel upright post lower surface and the base steel plates is removed with organic solvent；
Using GTAW connection technology, the channel steel upright post lower surface is soldered to into the upper end of the base steel plates
Face so that two row parallel arrangement of the channel steel upright post；
(3) beam structure is installed on the top of the pillar：
A corresponding slope is opened up using electric and pneumatic milling cutter respectively on the top of any two relative channel steel upright posts
Mouthful, and to carrying out flat smooth process at the groove so as to impulse- free robustness and overlap；
Some channel steel cross beams are taken, arbitrary crossbeam inserts any two corresponding grooves；
The channel steel upright post and the channel steel cross beam is gripped, the channel steel upright post and the channel steel cross beam are welded
Interface is preheated, and makes arbitrary interface temperature reach 100 DEG C or so；
The channel steel upright post and the channel steel cross beam butt welding face level is kept, is connect using the GTAW
Technology is welded；
A support is welded on the basis of the base steel plates, and the support includes channel steel upright post and channel steel cross beam；It is described
The interface of channel steel upright post and channel steel cross beam is pre-processed before welding, and is welded using GTAW connection technology
Connect so that the support is more consolidated and extends its service life in low temperature environment；
Step 3, installs the pre-embedded bolt：
(1) some spacing templates are made, and is determined for installing the pre-embedded bolt in arbitrary spacing template
First site；
(2) angle steel is respectively welded in arbitrary spacing template both sides parallel with the channel steel upright post,
(3) the second site for installing the pre-embedded bolt is determined in the channel steel cross beam upper surface, and the angle steel is welded on
On the upper surface of the channel steel cross beam so that first site is overlapped with second site；
(4) through hole matched with the pre-embedded bolt through the channel steel cross beam is opened up in first site；
(5) pre-embedded bolt is attached to into the through hole；
The pre-embedded bolt by spacing module be arranged on the support channel-section steel weigh on, the spacing module it is concrete
Position will be determined according to engineering pre-embedded steel slab in practice, built-in pipe, preformed hole etc.；
Step 4, welds gap detection：
By on weld edge rounding off to parent material, and face of weld is detected, the face of weld is existed
Crackle, lack of penetration, incomplete fusion and welded tumour defects；
Detection undercut depth so that the undercut depth is not more than 0.5mm, undercut total length in weld seam both sides is less than weld seam
The 20% of total length；
100%RT checks that RT must not be less than JB/T4730-2005-II level standards；
100%RT angle welding dye penetrant inspections, carry out visual examination to face of weld after welding, weld seam carries out Non-Destructive Testing.
In described large-scale space division device ice chest pre-embedded bolt mounting process, between the step 3 and the step 4 also
The step of skewed horizontal load bar is installed including one；
The skewed horizontal load bar is oblique to be soldered between the wantonly one or two adjacent channel steel upright post；The skewed horizontal load bar
An end points be soldered to the upper end of one of them channel steel upright post, another end points of the skewed horizontal load bar is soldered to separately
The lower end of one channel steel upright post.
In order to improve the enabling capabilities of support, between the one or two in office adjacent channel steel upright post, a skewed horizontal load is welded
Bar, can improve the enabling capabilities of the channel steel upright post, can improve the stability of channel steel upright post again.
In described large-scale space division device ice chest pre-embedded bolt mounting process, the GTAW connects technological parameter
For：4～5mm of gage of wire, tungsten filament diameter 5mm, 180～260A of welding current, argon flow amount 20L/min, nozzle bore 12～
14mm；The purity of the argon gas should be not less than 99.99%；And in the GTAW termination process, the horizontal stroke of welding wire
To 3 times swung no more than its diameter.
Technique is connect using GTAW to have the advantage that：Protected effect is good, and weldquality is high, argon gas not with gold
Category sends reaction, and does not dissolve in metal, and welding process is substantially the simple procedure of metal molten and crystallization, therefore can be obtained more
The pure and high weld seam of quality；Welding deformation and stress are little, as arc is by the compression and cooling effect of argon gas stream, arc heat quantity set
In, heat affected area is very narrow, welding deformation very little in low temperature environment；Easily observation, easy to operate；Stable, arc stability splashes few.
In described large-scale space division device ice chest pre-embedded bolt mounting process, welding rod or welding wire in the step 2, is removed
The greasy dirt on surface and oxide layer concrete operations are：
The welding rod or welding wire surface greasy dirt are removed using trichloro ethylene organic solvent；
Using the NaOH solution of 5%-10%, it is immersion 30-60 seconds, the removing welding rod or welding wire at 70 DEG C in temperature
Oxide layer.
In described large-scale space division device ice chest pre-embedded bolt mounting process, arbitrary base steel plates are vertical with the channel-section steel
An A-frame welds in the corner that post is formed.
In described large-scale space division device ice chest pre-embedded bolt mounting process, the channel steel upright post and the channel steel cross beam are adopted
Use 10# channel-section steels.
Although embodiment of the present invention is disclosed as above, which is not restricted to listed by specification and embodiment
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (9)
1. large-scale space division device ice chest pre-embedded bolt mounting process, it is characterised in that include：
Step one, on the bed course of air separation unit ice chest embedded foundation steel plate：
(1) position of the base steel plates is determined on the bed course according to the installation site of the pre-embedded bolt, in institute's rheme
Put the parallel base steel plates of pre-buried two row；
(2) anchor into expansion bolt arbitrary base steel plates are fixed on the bed course；
Step 2, support for installing the pre-embedded bolt is built in the base steel plates：
(1) pretreatment：Greasy dirt and the oxide layer of welding rod or welding wire surface is removed, and keeps the welding rod or welding wire surface dry
Only；
(2) pillar of the support is installed：
Some channel steel upright posts are taken, grinding process are carried out to the upper surface of the channel steel upright post lower surface and the base steel plates,
And the greasy dirt of the upper surface of the channel steel upright post lower surface and the base steel plates is removed with organic solvent；
Using GTAW connection technology, the channel steel upright post lower surface is soldered to into the upper surface of the base steel plates,
So that two row parallel arrangement of the channel steel upright post；
(3) beam structure is installed on the top of the pillar：
A corresponding groove is opened up using electric and pneumatic milling cutter respectively on the top of any two relative channel steel upright posts, and
To carrying out flat smooth process at the groove so as to impulse- free robustness and overlap；
Some channel steel cross beams are taken, arbitrary crossbeam inserts any two corresponding grooves；
The channel steel upright post and the channel steel cross beam is gripped, to the channel steel upright post and docking that the channel steel cross beam is welded
Face is preheated, and makes arbitrary interface temperature reach 100 DEG C or so；
The channel steel upright post and the channel steel cross beam butt welding face level is kept, using the GTAW connection technology
Welded；
Step 3, installs the pre-embedded bolt：
(1) some spacing templates are made, and determine in arbitrary spacing template for installing the pre-embedded bolt first
Site；
(2) angle steel is respectively welded in arbitrary spacing template both sides parallel with the channel steel upright post,
(3) the second site for installing the pre-embedded bolt is determined in the channel steel cross beam upper surface, and the angle steel is welded on described
On the upper surface of channel steel cross beam so that first site is overlapped with second site；
(4) through hole matched with the pre-embedded bolt through the channel steel cross beam is opened up in first site；
(5) pre-embedded bolt is attached to into the through hole；
Step 4, welds gap detection.
2. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 1, it is characterised in that the step 3
The step of also installing skewed horizontal load bar including one and the step 4 between；
The skewed horizontal load bar is oblique to be soldered between any two adjacent described channel steel upright posts；One of the skewed horizontal load bar
End points is soldered to the upper end of one of them channel steel upright post, and another end points of the skewed horizontal load bar is soldered to another institute
State the lower end of channel steel upright post.
3. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 2, it is characterised in that the step 4
Concrete steps include：
By on weld edge rounding off to parent material, and detect face of weld, make the face of weld must not exist crackle,
Lack of penetration, incomplete fusion and welded tumour defects；
Detection undercut depth so that the undercut depth is not more than 0.5mm, undercut total length in weld seam both sides is less than weld seam overall length
The 20% of degree；
100%RT checks that RT must not be less than II grade of standard of JB/T4730 2005-；
100%RT angle welding dye penetrant inspections.
4. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 3, it is characterised in that the manual tungsten
Electrode argon arc welding connects technological parameter：4～5mm of gage of wire, tungsten filament diameter 5mm, 180～260A of welding current, argon flow amount
20L/min, 12～14mm of nozzle bore.
5. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 4, it is characterised in that the argon gas
Purity 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, it is characterised in that in the craft
During Gas Tungsten Arc Welding, the teeter of welding wire is less 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 characterised in that the step 2
In remove the greasy dirt of welding rod or welding wire surface and oxide layer concrete operations are：
The welding rod or welding wire surface greasy dirt are removed using trichloro ethylene organic solvent；
Using the NaOH solution of 5%-10%, it is to soak the 30-60 seconds at 70 DEG C in temperature, removes the oxidation of the welding rod or welding wire
Layer.
8. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 7, it is characterised in that arbitrary base
Plinth steel plate welds an A-frame with the corner that the channel steel upright post is formed.
9. large-scale space division device ice chest pre-embedded bolt mounting process as claimed in claim 8, it is characterised in that the channel-section steel stands
Post and the channel steel cross beam adopt 10# channel-section steels.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN104785904B (en) | 2017-03-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223358B (en) * | 2016-07-19 | 2018-02-13 | 中国化学工程第三建设有限公司 | A kind of construction method for serving as a contrast casing metal sheet cold box foundation |
| 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 |
| CN110295620B (en) * | 2019-06-29 | 2021-03-26 | 上海二十冶建设有限公司 | Rapid and accurate positioning method for integral skid-mounted cold box of large air separation device |
| 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 |
| CN115055965B (en) * | 2022-08-22 | 2022-11-04 | 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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| CN104785904A (en) | 2015-07-22 |
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