CN105909034B - Air hermetic preserved contact net tubular steel post and preparation method thereof - Google Patents
Air hermetic preserved contact net tubular steel post and preparation method thereof Download PDFInfo
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- CN105909034B CN105909034B CN201610425613.9A CN201610425613A CN105909034B CN 105909034 B CN105909034 B CN 105909034B CN 201610425613 A CN201610425613 A CN 201610425613A CN 105909034 B CN105909034 B CN 105909034B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
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Abstract
The present invention relates to electric railway technologies, in particular to air hermetic preserved contact net tubular steel post and preparation method thereof.The end sealing of the tubular steel post cylinder is fixed with first flange disk, and first flange disk detachable-type sealed connects sealing cover, two gas nozzles are arranged on sealing cover, sealed valve is arranged on gas nozzle；The bottom end seal of cylinder is fixed with galvanized sheet, and drainage hole is arranged on galvanized sheet, and drainage hole is less than the cross sectional inner diameter of tubular steel post, and drainage hole is furnished with sealing plate.Sealing cover, sealing plate is arranged in both ends to zinc-plated tubular steel post by the present invention, after the completion of galvanizing by dipping, by the way that inner air to be extracted out to and is filled with nitrogen or the gas of oxidation reaction does not occur with zinc, iron, internal oxygen and moisture content are reduced to reach, greatly reduces the purpose of its internal oxidation speed.
Description
Technical field
The present invention relates to electric railway technologies, in particular to air hermetic preserved contact net tubular steel post and its system
Preparation Method.
Background technique
Existing steel pipe support for contact network uses inside and outside galvanizing by dipping anti-corrosion, and pillar is integrally placed at galvanized bath, in pillar two sides
If zinc-plated gas vent, it is ensured that galvanizing flux and gas can be smoothly discharged inside pillar, after the completion of zinc-plated, capital gas vent without
It blocks, with outside atmosphere connection inside pillar, seriously corroded local be easy to cause corrosion, and can not observe.
Summary of the invention
The purpose of the present invention is to provide a kind of air hermetic preserved contact net tubular steel posts and preparation method thereof, to solve to limit
The problem of internal corrosion of system, isolation etchant gas.
The present invention relates to a kind of air hermetic preserved contact net tubular steel post, the end sealing of cylinder is fixed with first flange
Disk, the first flange disk detachable-type sealed connect sealing cover, two gas nozzles are arranged on the sealing cover, set on the gas nozzle
Set sealed valve；The bottom end seal of the cylinder is fixed with galvanized sheet, and drainage hole is arranged on the galvanized sheet, and the drainage hole is small
In the cross sectional inner diameter of the tubular steel post, the drainage hole is furnished with sealing plate.
In some embodiments, preferably, second flange disk is arranged in the lid mouth of the sealing cover, is arranged two on the base
A gas nozzle.
In some embodiments, preferably, tetrafluoro washer is set between the first flange disk and the second flange disk.
In some embodiments, preferably, the valve is right-angle valve.
In some embodiments, preferably, filled with non-oxidized gas in the inner tube of the tubular steel post.
In some embodiments, preferably, the non-oxidized gas is preferably nitrogen.
The present invention also provides a kind of preparation methods of air hermetic preserved contact net tubular steel post comprising:
Step 1, both ends of the sealing to zinc-plated tubular steel post；
Step 2, it is inflated by the gas nozzle to zinc-plated tubular steel post end sealing lid into zinc-plated tubular steel post, detection weldering
Air-tightness at seam and sealing；
Step 3, it if air-tightness is qualified, dismantles to the sealing cover on zinc-plated tubular steel post top and the sealing plate of bottom end,
Then galvanizing by dipping is carried out to cylinder；If air-tightness is unqualified, unqualified place is repaired, step 1 and 2 are repeated；
Step 4, after galvanizing by dipping, the both ends of tubular steel post are again sealed off, and are vacuumized；
Step 5, it is filled with nitrogen into the sealed steel pipe pillar of vacuum to the first atmospheric pressure value, and observes air pressure change；
Step 6, if air pressure is unchanged, then into sealed steel pipe pillar nitrogen is filled with to the second atmospheric pressure value；To obtain the final product.
In some embodiments, preferably, the both ends of the sealed steel pipe pillar include:
Pass through the ring flange at the top of joint seal of flanges lid and cylinder；
Close two valves on sealing cover；
Using the drainage hole on sealing plate closing cylinder bottom galvanized sheet.
In some embodiments, preferably, the gas nozzle by zinc-plated tubular steel post end sealing lid is to zinc-plated
Inflation in tubular steel post, detecting the air-tightness at weld seam and sealing includes:
One of gas nozzle of sealing cover is connected into gas tube, another gas nozzle connects air gauge；
It is inflated by the gas nozzle into tubular steel post, and observes air pressure and reach preset value, close valve；
To zinc-plated tubular steel post weld seam and sealing at smear suds；
If suds are blown out bubble, determine that the air-tightness at bubble is unqualified；
If suds are not blown out bubble, determine that the air-tightness of tubular steel post is qualified.
In some embodiments, preferably, the preset value is 4 atmospheric pressure.
In some embodiments, preferably, first atmospheric pressure value is 0.05 atmospheric pressure；Second atmospheric pressure value is 1
A atmospheric pressure.
Air hermetic preserved contact net tubular steel post provided in an embodiment of the present invention and preparation method thereof, with prior art phase
Than sealing cover, sealing plate being arranged in the both ends to zinc-plated tubular steel post, after the completion of galvanizing by dipping, by extracting inner air out
And be filled with nitrogen or the gas of oxidation reaction does not occur with zinc, iron, internal oxygen and moisture content are reduced to reach, is greatly reduced
The purpose of its internal oxidation speed.
Detailed description of the invention
The structural representation of air hermetic preserved contact net tubular steel post when Fig. 1 is in one embodiment of the invention from angle
Figure；
The structure of air hermetic preserved contact net tubular steel post when Fig. 2 is in one embodiment of the invention from another angle
Schematic diagram；
Fig. 3 is the preparation method step schematic diagram of air hermetic preserved contact net tubular steel post in one embodiment of the invention.
Note: 1 first flange disk；2 cylinders；3 second flange disks；4 bases；5 sealed valves；6 galvanized sheets；7 drainage holes.
Specific embodiment
The present invention is described in further detail below by specific embodiment combination attached drawing.
In view of existing steel pipe support for contact network is using in inside and outside galvanizing by dipping anti-corrosion, join inside pillar with outside atmosphere
It is logical, cause seriously corroded inside pillar, the problem of durability difference, the present invention provides air hermetic preserved contact net tubular steel post and
Preparation method.
A kind of air hermetic preserved contact net tubular steel post, the end sealing of cylinder are fixed with first flange disk, the first method
Blue disk is tightly connected sealing cover, and two gas nozzles are arranged on sealing cover, sealed valve, first flange disk and sealing cover is arranged on gas nozzle
It is connected by flange seal；The bottom end seal of cylinder is fixed with galvanized sheet, drainage hole is arranged on galvanized sheet, drainage hole is equipped with sealing
Plate.
A kind of preparation method of air hermetic preserved contact net tubular steel post comprising:
Step 1, both ends of the sealing to zinc-plated tubular steel post；
Step 2, it is inflated by the gas nozzle to zinc-plated tubular steel post end sealing lid into zinc-plated tubular steel post, detection weldering
Air-tightness at seam and sealing；
Step 3, it if air-tightness is qualified, dismantles to the sealing cover on zinc-plated tubular steel post top and the sealing plate of bottom end,
Then galvanizing by dipping is carried out to cylinder；If air-tightness is unqualified, unqualified place is repaired, step 1 and 2 are repeated；
Step 4, after galvanizing by dipping, the both ends of tubular steel post are again sealed off, and are vacuumized；
Step 5, it is filled with nitrogen into the sealed steel pipe pillar of vacuum to the first atmospheric pressure value, and observes air pressure change；
Step 6, if air pressure is unchanged, then into sealed steel pipe pillar nitrogen is filled with to the second atmospheric pressure value；To obtain the final product.
Sealing cover, sealing plate is arranged in both ends to zinc-plated tubular steel post, after the completion of galvanizing by dipping, by by inner air
It extracts and is filled with nitrogen out or the gas of oxidation reaction does not occur with zinc, iron, reduce internal oxygen and moisture content to reach, greatly
Reduce the purpose of its internal oxidation speed.
Next, technology is described in detail by some specific embodiments:
A kind of air hermetic preserved contact net tubular steel post, as shown in Figs. 1-2, fix in the end sealing of cylinder 2 (for example weld
Connect, be integrally machined) first flange disk 1, the sealed connection sealing cover of first flange disk 1, the lid mouth setting second flange of sealing cover
Disk 3 is connected by screw bolts with first flange disk 1.Sealing cover energy first flange disk 1 disassembles, and closing is used as after zinc-plated.It is close
Two gas nozzles are set in capping, and two gas nozzles are arranged on base 4, one of them is another for connecting air inlet (or pumping) pipe
It is a to be used to connect air gauge.Space in the pipe for needing to close tubular steel post after inflation or pumping, therefore be all provided on each gas nozzle
Sealed valve 5 is set, which is right-angle valve.Traditional 2 low side of cylinder is not provided with any sealing structure, promotes in pipe always
It is exposed in air, is easily corroded, it is improved in the present invention, the bottom end seal of cylinder 2 is fixed with zinc-plated in pipe
Plate 6, drainage hole 7 is arranged on galvanized sheet 6, and the aperture of drainage hole 7 is less than the cross sectional inner diameter of tubular steel post.Drainage hole 7 is equipped with close
Sealing plate is sealed drainage hole 7 using sealing plate after galvanizing by dipping.
In order to improve the sealing effect between first flange disk 1 and second flange disk 3, tetrafluoro can be set between
Washer.It is the air-tightness of washer, compressibility, creep resistance, resist chemical, high resilience, anti-glutinous when selecting tetrafluoro washer
Connecing property, non-corrosive, resistance to temperature are intended to reach certain requirement, to guarantee that strut seal flange is long-term under extraneous corrosive environment
Airtight effect.
After galvanizing by dipping, by sealing cover and sealing plate, closure airtight to tubular steel post inside is controlled respectively, avoids pillar
Inside is corroded, and realizes that steel construction bracket pillar is handled in external anti-corrosion reinforcement on coastal rainy, heavily contaminated district railway bridge
Afterwards, the internal and external anti-corrosive time limit is at least up to 50 years；It avoids since corrosion causes pillar discarded inside pillar.
Moreover, in order to further avoid being aoxidized inside tubular steel post, also filled with non-oxide gas in the inner tube of tubular steel post
Body, preferably nitrogen.Non-oxide inert gas is contacted with tubular steel post does not occur oxidation reaction, is that a kind of preferable anti-corrosion is arranged
It applies.
In order to prepare above-mentioned air hermetic preserved contact net tubular steel post, as shown in figure 3, its method includes the following steps:
Step 101, both ends of the sealing to zinc-plated tubular steel post；
The step is to detect the air-tightness at weld seam and sealing in next step and prepare.Because in tubular steel post finished product
It can be filled with inert non-oxidizing gases, to improve anti-corrosion effect, in order to avoid inert non-oxidizing gases spilling, so needing in inner tube
Air-tightness is detected in advance, once poor air-tightness, needs to be repaired in advance.
Pass through the ring flange at the top of joint seal of flanges lid and cylinder first；Two valves being then shut off on sealing cover；
Using the drainage hole on sealing plate closing cylinder bottom galvanized sheet.
Step 102, it is inflated by the gas nozzle to zinc-plated tubular steel post end sealing lid to the inner tube to zinc-plated tubular steel post,
Detect the air-tightness at weld seam and sealing；
The mode of detection air-tightness has very much, the principle that blows bubbles is borrowed in the present embodiment, in the inner tube of tubular steel post
Inflatable body, if poor air-tightness, the gas run out of can blow out the bubble of suds.Specifically:
It is inflated with air compressor machine, (atmospheric pressure value is not fixed in actual operation, is frothed as long as can reach for air pressure to 4.0
The purpose of bubble, and do not damage tubular steel post) when, suds are applied at weld seam and sealing, check weld seam and sealing matter
Amount.If there is gas leak phenomenon, weld seam is resealed or repaired, carries out removing capping if intact and gas nozzle carries out hot-dip
Zinc.
One of gas nozzle of sealing cover is connected into gas tube, another gas nozzle connects air gauge；By gas nozzle to steel pipe
Inflation in pillar, and observe air pressure and reach preset value, close valve；Suds are smeared at the weld seam of tubular steel post and sealing；
If suds are blown out bubble, determine that the air-tightness at bubble is unqualified；If suds are not blown out bubble, steel pipe is determined
The air-tightness of pillar is qualified.
Step 101 and step 102 belong to the zinc-plated preceding air tightness test of zinc-plated tubular steel post.
Step 103, it if air-tightness is qualified, dismantles to the sealing cover on zinc-plated tubular steel post top and the sealing of bottom end
Then plate carries out galvanizing by dipping to cylinder；If air-tightness is unqualified, after resealing or repairing weld seam, step 101 is repeated
With 102；
Step 104, after galvanizing by dipping, the both ends of tubular steel post are again sealed off, and are vacuumized；
The step is and to prevent its gas leakage from preparing in order to then to filling inert non-oxidizing gas in tubular steel post.By air pressure
Table accesses a gas nozzle, and the exhaust tube of air exhauster contacts another gas nozzle, is evacuated on one side, observes the variation of atmospheric pressure value on one side.
Step 105, it is filled with nitrogen into the sealed steel pipe pillar of vacuum to the first atmospheric pressure value, and observes air pressure change；
This step be in order to detect it is zinc-plated after tubular steel post air-tightness.Specifically: nitrogen is packed into tubular steel post
To 0.05 atmospheric pressure, stop state into quiet, after stopping at least through 24 hours quiet, reexamines air pressure inside.Air pressure without
(temperature effect is considered) when variation, confirmation products air tightness is qualified, otherwise steel column structure weld seam is examined again using ultrasonic wave, and
It repairs.
Step 106,
Step 106, if air pressure is unchanged, then into sealed steel pipe pillar nitrogen is filled with to the second atmospheric pressure value；It closes straight
Angle valve, remove air gauge and gas tube to get.
After air pressure inside No leakage and variation, continue to be filled with 1 when the inert non-oxidizing gases such as nitrogen to room temperature
Standard pressure.Air pressure is according to temperature when inflation when specific inflation, according to its equation of The Ideal-Gas Equation, i.e. pV=nRT, really
Determine inner gas pressure under relevant temperature.
Pillar is processed into enclosed construction, passes through column by this project product pillar using tubular steel post to the special processing of pillar
Top and column bottom installation sealing air valve, pillar inside and outside wall uses galvanizing by dipping preservative treatment, after the completion of galvanizing by dipping, by will be internal
Air is extracted and is filled with nitrogen out or the gas of oxidation reaction do not occur with zinc, iron, and carries out air tight test, to reach in reduction
Portion's oxygen and moisture content greatly reduce the purpose of its internal oxidation speed, realize and carry out long-effective corrosion inside pillar.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of air hermetic preserved contact net tubular steel post, which is characterized in that the end sealing of its cylinder is fixed with first flange
Disk, the first flange disk detachable-type sealed connect sealing cover, two gas nozzles are arranged on the sealing cover, set on the gas nozzle
Set sealed valve；The bottom end seal of the cylinder is fixed with galvanized sheet, and drainage hole is arranged on the galvanized sheet, and the drainage hole is small
In the cross sectional inner diameter of the tubular steel post, the drainage hole is furnished with sealing plate；The tubular steel post is zinc-plated pillar；The steel
Tube support inner sealing nitrogen；
The preparation method of the tubular steel post includes:
Step 1, both ends of the sealing to zinc-plated tubular steel post；
Step 2, it is inflated by the gas nozzle to zinc-plated tubular steel post end sealing lid into zinc-plated tubular steel post,
Detect the air-tightness at weld seam and sealing；
Step 3, it if air-tightness is qualified, dismantles to the sealing cover on zinc-plated tubular steel post top and the sealing plate of bottom end, then
Galvanizing by dipping is carried out to cylinder；If air-tightness is unqualified, unqualified place is repaired, step 1 and 2 are repeated；
Step 4, after galvanizing by dipping, the both ends of tubular steel post are again sealed off, and are vacuumized；
Step 5, it is filled with nitrogen into the sealed steel pipe pillar of vacuum to the first atmospheric pressure value, and observes air pressure change；
Step 6, if air pressure is unchanged, then into sealed steel pipe pillar nitrogen is filled with to the second atmospheric pressure value；To obtain the final product.
2. air hermetic preserved contact net tubular steel post as described in claim 1, which is characterized in that the lid mouth of the sealing cover is set
Second flange disk is set, two gas nozzles are set on base.
3. air hermetic preserved contact net tubular steel post as claimed in claim 2, which is characterized in that the first flange disk and institute
State setting tetrafluoro washer between second flange disk.
4. air hermetic preserved contact net tubular steel post as described in claim 1, which is characterized in that the valve is right-angle valve.
5. a kind of preparation method of any one of claim 1-4 air hermetic preserved contact net tubular steel post, which is characterized in that
Include:
Step 1, both ends of the sealing to zinc-plated tubular steel post；
Step 2, it is inflated by the gas nozzle to zinc-plated tubular steel post end sealing lid into zinc-plated tubular steel post,
Detect the air-tightness at weld seam and sealing；
Step 3, it if air-tightness is qualified, dismantles to the sealing cover on zinc-plated tubular steel post top and the sealing plate of bottom end, then
Galvanizing by dipping is carried out to cylinder；If air-tightness is unqualified, unqualified place is repaired, step 1 and 2 are repeated；
Step 4, after galvanizing by dipping, the both ends of tubular steel post are again sealed off, and are vacuumized；
Step 5, it is filled with nitrogen into the sealed steel pipe pillar of vacuum to the first atmospheric pressure value, and observes air pressure change；
Step 6, if air pressure is unchanged, then into sealed steel pipe pillar nitrogen is filled with to the second atmospheric pressure value；To obtain the final product.
6. preparation method as claimed in claim 5, which is characterized in that the both ends of the sealed steel pipe pillar
It include: by the ring flange at the top of joint seal of flanges lid and cylinder；Close two valves on sealing cover；Using sealing
Plate closes the drainage hole on the galvanized sheet of cylinder bottom.
7. such as preparation method described in claim 5 or 6, which is characterized in that described by zinc-plated tubular steel post end sealing
The gas nozzle of lid is inflated into zinc-plated tubular steel post, is detected the air-tightness at weld seam and sealing and is included:
One of gas nozzle of sealing cover is connected into gas tube, another gas nozzle connects air gauge；By the gas nozzle to steel pipe
Inflation in pillar, and observe air pressure and reach preset value, close valve；To zinc-plated tubular steel post weld seam and sealing at smear fertilizer
Soap water；If suds are blown out bubble, determine that the air-tightness at bubble is unqualified；If suds are not blown out bubble, sentence
The air-tightness for determining tubular steel post is qualified.
8. preparation method as claimed in claim 7, which is characterized in that the preset value is 4 atmospheric pressure；And/or described
One atmospheric pressure value is 0.05 atmospheric pressure；Second atmospheric pressure value is 1 atmospheric pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610425613.9A CN105909034B (en) | 2016-06-15 | 2016-06-15 | Air hermetic preserved contact net tubular steel post and preparation method thereof |
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|---|---|---|---|
| CN201610425613.9A CN105909034B (en) | 2016-06-15 | 2016-06-15 | Air hermetic preserved contact net tubular steel post and preparation method thereof |
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| CN105909034B true CN105909034B (en) | 2019-02-15 |
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| CN108945515A (en) * | 2018-07-18 | 2018-12-07 | 中国人民解放军总参谋部第六十研究所 | A kind of helicopter fuselage frame and its application method with monitoring device |
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| CN202831759U (en) * | 2012-09-25 | 2013-03-27 | 中国电力工程顾问集团东北电力设计院 | Air inflation steel tube constructional element |
| CN204098027U (en) * | 2014-09-24 | 2015-01-14 | 安徽省交通建设有限责任公司 | A kind of freezing process guard aperture shaped pile structure |
| CN205805100U (en) * | 2016-06-15 | 2016-12-14 | 中铁工程设计咨询集团有限公司 | Air hermetic preserved contact net tubular steel post |
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- 2016-06-15 CN CN201610425613.9A patent/CN105909034B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09112072A (en) * | 1995-10-20 | 1997-04-28 | Nippon Chikou Kk | Electrocorrosion preventive device of steel pipe electric pole and its construction method |
| CN201162370Y (en) * | 2008-01-24 | 2008-12-10 | 中铁十局集团有限公司 | Contact net steel column |
| CN202000725U (en) * | 2011-04-26 | 2011-10-05 | 山东中铁华盛机械有限公司 | Steel pipe support for contact network |
| CN202194424U (en) * | 2011-07-22 | 2012-04-18 | 中铁第一勘察设计院集团有限公司 | Aeolation-prevention thin-wall centrifugal concrete steel pipe support for electric railway catenary |
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