CN105909034A - Airtight type anticorrosion contact net steel pipe strut and preparing method thereof - Google Patents
Airtight type anticorrosion contact net steel pipe strut and preparing method thereof Download PDFInfo
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- CN105909034A CN105909034A CN201610425613.9A CN201610425613A CN105909034A CN 105909034 A CN105909034 A CN 105909034A CN 201610425613 A CN201610425613 A CN 201610425613A CN 105909034 A CN105909034 A CN 105909034A
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- air
- tubular steel
- steel post
- sealing
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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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- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the electric railway technique, in particular to an airtight type anticorrosion contact net steel pipe strut and a preparing method thereof. A first flange plate is fixed to the top end of a steel pipe strut body in a sealing mode, the first flange plate is in sealed connection with a sealing cover in a detachable mode, two air nozzles are arranged on the sealing cover, and airtight valves are arranged on the air nozzles; a galvanized sheet is fixed to the bottom end of the strut body in a sealing mode, a liquid drainage port is formed in the galvanized sheet, the diameter of the liquid drainage port is smaller than the inner diameter of the cross section of the steep pipe strut, and a sealing plate is matched with the liquid drainage port. The sealing cover and the sealing plate are arranged at the two ends of the steel pipe strut to be galvanized, after dipping galvanizing, air inside is pumped out, nitrogen or other gas not reacting with zinc or iron through oxidation is introduced, and then the content of oxygen and water inside is reduced and oxidation rate inside is reduced greatly.
Description
Technical field
The present invention relates to electric railway technology, in particular to air hermetic preserved contact net tubular steel post
And preparation method thereof.
Background technology
Existing steel pipe support for contact network uses inside and outside galvanizing by dipping anticorrosion, and pillar is integrally placed at galvanized bath, is propping up
Post both sides set zinc-plated steam vent, it is ensured that the internal galvanizing flux of pillar and gas can be discharged smoothly, zinc-plated complete after,
Capital steam vent does not blocks, and pillar inside and outside atmosphere UNICOM, seriously corroded local is easily made
Become corrosion, and cannot observe.
Summary of the invention
It is an object of the invention to provide a kind of air hermetic preserved contact net tubular steel post and preparation method thereof, with
Solve to limit internal corrosion, the problem of isolation etchant gas.
The present invention relates to a kind of air hermetic preserved contact net tubular steel post, the end sealing of its cylinder is fixed with the
One ring flange, described first ring flange detachable-type sealed connects seal cap, and described sealing covers and arranges two
Valve, described valve arranges sealed valve；The bottom end seal of described cylinder is fixed with galvanized sheet, described plating
Arranging outage on zine plate, described outage is less than the cross sectional inner diameter of described tubular steel post, described outage
It is furnished with sealing plate.
In certain embodiments, being preferably, the described lid mouth sealing lid arranges the second ring flange, at the bottom of described lid
On two described valves are set.
In certain embodiments, it is preferably, between described first ring flange and described second ring flange, arranges four
Fluorine packing ring.
In certain embodiments, being preferably, described valve is right-angle valve.
In certain embodiments, it is preferably, in the inner tube of described tubular steel post, is filled with non-oxidized gas.
In certain embodiments, being preferably, described non-oxidized gas is preferably nitrogen.
Present invention also offers the preparation method of a kind of described air hermetic preserved contact net tubular steel post, comprising:
Step 1, seals the two ends treating zinc-plated tubular steel post；
Step 2, by treating that the valve of zinc-plated tubular steel post end sealing lid is inflated in treating zinc-plated tubular steel post,
Air-tightness at detection weld seam and sealing；
Step 3, if air-tightness is qualified, then the sealing lid and bottom end on zinc-plated tubular steel post top is treated in dismounting
Sealing plate, then carries out galvanizing by dipping to cylinder；If air-tightness is defective, repairs defective place, then weigh
Multiple step 1 and 2；
Step 4, after galvanizing by dipping, is again sealed off the two ends of tubular steel post, and evacuation；
Step 5, is filled with nitrogen to the first atmospheric pressure value in the sealed steel pipe pillar of vacuum, and observes air pressure and become
Change；
Step 6, if air pressure is unchanged, is filled with nitrogen the most again to the second atmospheric pressure value in sealed steel pipe pillar；
Obtain.
In certain embodiments, being preferably, the two ends of described sealed steel pipe pillar include:
By joint seal of flanges lid and the ring flange at cylinder top；
Close and seal two valves covered；
Use the outage that sealing plate is closed bottom cylinder on galvanized sheet.
In certain embodiments, be preferably, the described valve by treating zinc-plated tubular steel post end sealing lid to
Treating inflation in zinc-plated tubular steel post, the air-tightness at detection weld seam and sealing includes:
One of them valve sealing lid is connected gas tube, and another valve connects air gauge；
Inflated in tubular steel post by described valve, and observe air pressure and reach preset value, close valve；
Suds are smeared at the weld seam treating zinc-plated tubular steel post and sealing；
If suds are blown bubble, then judge that the air-tightness at bubble is defective；
If suds are not blown bubble, then judge that the air-tightness of tubular steel post is qualified.
In certain embodiments, being preferably, described preset value is 4 atmospheric pressure.
In certain embodiments, being preferably, described first atmospheric pressure value is 0.05 atmospheric pressure；Described second gas
Pressure value is 1 atmospheric pressure.
Air hermetic preserved contact net tubular steel post that the embodiment of the present invention provides and preparation method thereof, with existing skill
Art is compared, and the two ends treating zinc-plated tubular steel post arrange sealing lid, sealing plate, after galvanizing by dipping completes, logical
Cross inner air is extracted out and is filled with nitrogen or not with zinc, the gas of ferrum generation oxidation reaction, to reduce
Internal oxygen and moisture, greatly reduce the purpose of its internal oxidation speed.
Accompanying drawing explanation
Fig. 1 be in one embodiment of the invention when angle is observed the knot of air hermetic preserved contact net tubular steel post
Structure schematic diagram；
Fig. 2 be in one embodiment of the invention when another angle is observed air hermetic preserved contact net tubular steel post
Structural representation；
Fig. 3 is that in one embodiment of the invention, the preparation method step of air hermetic preserved contact net tubular steel post is shown
It is intended to.
Note: 1 first ring flange；2 cylinders；3 second ring flanges；At the bottom of 4 lids；5 sealed valves；6 galvanized sheets；
7 outages.
Detailed description of the invention
Combine accompanying drawing below by specific embodiment the present invention is described in further detail.
Using in inside and outside galvanizing by dipping anticorrosion in view of existing steel pipe support for contact network, pillar is internal big with outside
Gas UNICOM, causes pillar internal corrosion serious, and the problem of poor durability the invention provides air hermetic anticorrosion
Steel pipe support for contact network and preparation method thereof.
A kind of air hermetic preserved contact net tubular steel post, the end sealing of its cylinder is fixed with the first ring flange,
First flangeseal connects seal cap, and sealing covers and arranges two valves, valve arranges sealed valve,
First ring flange and sealing lid are connected by flange seal；The bottom end seal of cylinder is fixed with galvanized sheet, zinc-plated
Arranging outage on plate, outage is furnished with sealing plate.
A kind of preparation method of air hermetic preserved contact net tubular steel post, comprising:
Step 1, seals the two ends treating zinc-plated tubular steel post；
Step 2, by treating that the valve of zinc-plated tubular steel post end sealing lid is inflated in treating zinc-plated tubular steel post,
Air-tightness at detection weld seam and sealing；
Step 3, if air-tightness is qualified, then the sealing lid and bottom end on zinc-plated tubular steel post top is treated in dismounting
Sealing plate, then carries out galvanizing by dipping to cylinder；If air-tightness is defective, repairs defective place, then weigh
Multiple step 1 and 2；
Step 4, after galvanizing by dipping, is again sealed off the two ends of tubular steel post, and evacuation；
Step 5, is filled with nitrogen to the first atmospheric pressure value in the sealed steel pipe pillar of vacuum, and observes air pressure and become
Change；
Step 6, if air pressure is unchanged, is filled with nitrogen the most again to the second atmospheric pressure value in sealed steel pipe pillar；
Obtain.
The two ends treating zinc-plated tubular steel post are arranged sealing lid, sealing plate, after galvanizing by dipping completes, by inciting somebody to action
Inner air extract out and be filled with nitrogen or not with zinc, the gas of ferrum generation oxidation reaction, to reduce inside
Oxygen and moisture, greatly reduce the purpose of its internal oxidation speed.
It follows that technology is described in detail by some specific embodiments:
A kind of air hermetic preserved contact net tubular steel post, as shown in Figure 1-2, solid at the end sealing of cylinder 2
Fixed (such as weld, be integrally machined) first ring flange 1, the first ring flange 1 is tightly connected sealing lid, close
The lid mouth of capping arranges the second ring flange 3, with bolts with the first ring flange 1.Sealing lid can the first method
Blue dish 1 disassembles, and is used as to close after zinc-plated.Sealing covers and arranges two valves, and two valves are arranged
On at the bottom of lid 4, one of them is used for connecting air inlet (or bleeding) pipe, and another is used for connecting air gauge.
After inflating or bleeding, need space in the pipe of closing tubular steel post, the most each valve is respectively provided with airtight valve
Door 5, this valve is right-angle valve.Traditional cylinder 2 low side is not provided with any sealing structure, in promoting pipe
All the time it is exposed in air, is easily corroded in pipe, in the present invention it is improved, the end of cylinder 2
End sealing is fixed with galvanized sheet 6, and galvanized sheet 6 arranges outage 7, and the aperture of outage 7 is propped up less than steel pipe
The cross sectional inner diameter of post.Outage 7 is furnished with sealing plate, uses sealing plate by outage 7 after galvanizing by dipping
Seal.
In order to improve the sealing effectiveness between the first ring flange 1 and the second ring flange 3, can be between
Tetrafluoro packing ring is set.When selecting tetrafluoro packing ring, the air-tightness of packing ring, compressibility, creep resistance, anti-
Chemical attack, high resilience, anti-cementability, non-corrosiveness, resistance to temperature are intended to reach certain requirement, with
Ensure the airtight effect that strut seal flange is long-term under extraneous corrosive environment.
After galvanizing by dipping, control by sealing lid and sealing plate closure airtight to tubular steel post inside respectively, keep away
Exempt from that pillar is internal to be corroded, it is achieved on coastal rainy, heavily contaminated district railway bridge, steel construction bracket pillar exists
After outside anticorrosion reinforcement processes, the internal and external anti-corrosive time limit is at least up to 50 years；Avoid owing to pillar internal corrosion is made
Pillar is become to discard.
And, in order to avoid further, tubular steel post is internal to be aoxidized, and is also filled with non-in the inner tube of tubular steel post
Oxidizing gas, preferably nitrogen.Non-oxide noble gas contacts with tubular steel post and oxidation reaction does not occurs, and is
A kind of preferably anti-corrosion measure.
In order to prepare above-mentioned air hermetic preserved contact net tubular steel post, as it is shown on figure 3, its method includes as follows
Step:
Step 101, seals the two ends treating zinc-plated tubular steel post；
This step is in order to next step air-tightness detected at weld seam and sealing is prepared.Because at tubular steel post
Inert non-oxidizing gases can be filled with, to improve antiseptic effect, in order to avoid inert non-oxidizing in the inner tube of finished product
Gas overflowing, so needing to detect air-tightness in advance, once poor air-tightness, needs to repair in advance
Mend.
First pass through joint seal of flanges lid and the ring flange at cylinder top；It is then shut off sealing two covered
Valve；Use the outage that sealing plate is closed bottom cylinder on galvanized sheet.
Step 102, by treating that the valve of zinc-plated tubular steel post end sealing lid is in treating zinc-plated tubular steel post
Pipe is inflated, the air-tightness at detection weld seam and sealing；
Detect bubble-tight mode and have a lot, use the principle that blows bubbles in the present embodiment, at tubular steel post
Inflatable body in inner tube, if poor air-tightness, the gas run out of can blow out the bubble of suds.Particularly as follows:
It is inflated with air compressor machine, air pressure to 4.0 (in practical operation, this atmospheric pressure value is not fixed, if energy
Reach the purpose blown bubbles, the most do not damage tubular steel post) time, suds are applied to weld seam and sealing
Place, checks weld seam and airtight quality.If there being gas leak phenomenon, then carry out resealing or repairing weld seam, if complete
Good then carry out remove capping and valve carry out galvanizing by dipping.
One of them valve sealing lid is connected gas tube, and another valve connects air gauge；Pass through valve
Inflate in tubular steel post, and observe air pressure and reach preset value, close valve；Tubular steel post weld seam and
Suds are smeared at sealing；If suds are blown bubble, then judge that the air-tightness at bubble is defective；If
Suds are not blown bubble, then judge that the air-tightness of tubular steel post is qualified.
Step 101 and step 102 belong to treats the zinc-plated front air tightness test of zinc-plated tubular steel post.
Step 103, if air-tightness is qualified, then the sealing lid and bottom end on zinc-plated tubular steel post top is treated in dismounting
Sealing plate, then cylinder is carried out galvanizing by dipping；If air-tightness is defective, reseal or repairing welding
After seam, repeat step 101 and 102；
Step 104, after galvanizing by dipping, is again sealed off the two ends of tubular steel post, and evacuation；
This step is in order to filling inert non-oxidizing gas in backward tubular steel post, and prevents its gas leakage from preparing.
Air gauge is accessed a valve, and the exhaust tube of air exhauster contacts another valve, bleeds, while seeing
Examine the change of atmospheric pressure value.
Step 105, is filled with nitrogen in 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 zinc-plated after the air-tightness of tubular steel post.Particularly as follows: it is built-in to tubular steel post
Enter nitrogen to 0.05 atmospheric pressure, enter and quiet stop state, after stopping at least through 24 hours quiet, then
Check air pressure inside.When air pressure is unchanged (consideration temperature effects), confirm that products air tightness is qualified, otherwise profit
Again check steel column structure weld seam with ultrasound wave, and repair.
Step 106,
Step 106, if air pressure is unchanged, is filled with nitrogen the most again to the second atmospheric pressure value in sealed steel pipe pillar；
Close right-angle valve, pull down air gauge and gas tube, to obtain final product.
After air pressure inside No leakage and change, when proceeding to be filled with the inert non-oxidizing gases such as nitrogen to room temperature
1 standard pressure.Concrete inflation seasonal epidemic pathogens at all according to temperature during inflation, according to The Ideal-Gas Equation its
Equation, i.e. pV=nRT, determine inner gas pressure under relevant temperature.
This Project Product pillar uses tubular steel post, processing special to pillar, and pillar is processed into enclosed construction,
Sealing air valve by installing at the bottom of capital and post, pillar inside and outside wall uses galvanizing by dipping preservative treatment, galvanizing by dipping
After completing, by inner air is extracted out and is filled with nitrogen or not with zinc, the gas of ferrum generation oxidation reaction,
And carry out air tight test, to reduce internal oxygen and moisture, greatly reduce its internal oxidation speed
The purpose of degree, it is achieved carry out long-effective corrosion inside pillar.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for ability
For the technical staff in territory, the present invention can have various modifications and variations.All in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvement etc. made, should be included in protection scope of the present invention it
In.
Claims (10)
1. an air hermetic preserved contact net tubular steel post, it is characterised in that the end sealing of its cylinder is fixed
Having the first ring flange, described first ring flange detachable-type sealed to connect seal cap, described sealing covers setting
Two valves, described valve arranges sealed valve；The bottom end seal of described cylinder is fixed with galvanized sheet, institute
Stating and arrange outage on galvanized sheet, described outage is less than the cross sectional inner diameter of described tubular steel post, described row
Fluid apertures is furnished with sealing plate.
2. air hermetic preserved contact net tubular steel post as claimed in claim 1, it is characterised in that described close
Capping lid mouth the second ring flange is set, at the bottom of described lid on two described valves are set.
3. air hermetic preserved contact net tubular steel post as claimed in claim 2, it is characterised in that described the
Between one ring flange and described second ring flange, tetrafluoro packing ring is set.
4. air hermetic preserved contact net tubular steel post as claimed in claim 1, it is characterised in that described valve
Door is right-angle valve.
5. the air hermetic preserved contact net tubular steel post as described in any one of claim 1-4, its feature exists
In, it is filled with non-oxidized gas in the inner tube of described tubular steel post.
6. air hermetic preserved contact net tubular steel post as claimed in claim 5, it is characterised in that described non-
Oxidizing gas is preferably nitrogen.
7. a preparation method for air hermetic preserved contact net tubular steel post described in any one of claim 1-6,
It is characterized in that, including:
Step 1, seals the two ends treating zinc-plated tubular steel post；
Step 2, by treating that the valve of zinc-plated tubular steel post end sealing lid is inflated in treating zinc-plated tubular steel post,
Air-tightness at detection weld seam and sealing；
Step 3, if air-tightness is qualified, then the sealing lid and bottom end on zinc-plated tubular steel post top is treated in dismounting
Sealing plate, then carries out galvanizing by dipping to cylinder；If air-tightness is defective, repairs defective place, then weigh
Multiple step 1 and 2；
Step 4, after galvanizing by dipping, is again sealed off the two ends of tubular steel post, and evacuation；
Step 5, is filled with nitrogen to the first atmospheric pressure value in the sealed steel pipe pillar of vacuum, and observes air pressure and become
Change；
Step 6, if air pressure is unchanged, is filled with nitrogen the most again to the second atmospheric pressure value in sealed steel pipe pillar；
Obtain.
8. preparation method as claimed in claim 7, it is characterised in that the two ends of described sealed steel pipe pillar
Including:
By joint seal of flanges lid and the ring flange at cylinder top；
Close and seal two valves covered；
Use the outage that sealing plate is closed bottom cylinder on galvanized sheet.
9. preparation method as claimed in claim 7 or 8, it is characterised in that described by treating coating steel pipe
The valve of pillar end sealing lid is inflated in treating zinc-plated tubular steel post, the air-tightness at detection weld seam and sealing
Including:
One of them valve sealing lid is connected gas tube, and another valve connects air gauge；
Inflated in tubular steel post by described valve, and observe air pressure and reach preset value, close valve；
Suds are smeared at the weld seam treating zinc-plated tubular steel post and sealing；
If suds are blown bubble, then judge that the air-tightness at bubble is defective；
If suds are not blown bubble, then judge that the air-tightness of tubular steel post is qualified.
10. preparation method as claimed in claim 9, it is characterised in that described preset value is 4 air
Pressure；And/or, described first atmospheric pressure value is 0.05 atmospheric pressure；Described second atmospheric pressure value is 1 atmospheric pressure.
Priority Applications (1)
| 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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| 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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| Publication Number | Publication Date |
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| CN105909034A true CN105909034A (en) | 2016-08-31 |
| CN105909034B CN105909034B (en) | 2019-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (8)
| 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 |
| CN202658947U (en) * | 2012-06-26 | 2013-01-09 | 中国铁建电气化局集团第五工程有限公司 | Annular concrete-filled steel tube strut for catenary |
| 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 |
-
2016
- 2016-06-15 CN CN201610425613.9A patent/CN105909034B/en active Active
Patent Citations (8)
| 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 |
| CN202658947U (en) * | 2012-06-26 | 2013-01-09 | 中国铁建电气化局集团第五工程有限公司 | Annular concrete-filled steel tube strut for catenary |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
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| CN105909034B (en) | 2019-02-15 |
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