CN212250332U - Anti-corrosion structure of wind power tower cylinder flange - Google Patents
Anti-corrosion structure of wind power tower cylinder flange Download PDFInfo
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- CN212250332U CN212250332U CN202020380808.8U CN202020380808U CN212250332U CN 212250332 U CN212250332 U CN 212250332U CN 202020380808 U CN202020380808 U CN 202020380808U CN 212250332 U CN212250332 U CN 212250332U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The utility model provides an anti-corrosion structure of a wind power tower cylinder flange, which comprises at least two tower cylinder flanges, an anti-corrosion passivation layer, a butyl sealing adhesive tape layer and an elastic protective layer; wherein, form the clearance between two adjacent tower section of thick bamboo flanges, the anticorrosion passivation layer coats on the outer wall of tower section of thick bamboo flange, and be located clearance department, butyl sealing adhesive tape layer coats in the one side that the anticorrosion passivation layer deviates from the tower section of thick bamboo flange, the elasticity inoxidizing coating coats in the one side that butyl sealing adhesive tape layer deviates from the anticorrosion passivation layer, wherein, the width of anticorrosion passivation layer is greater than the width on butyl sealing adhesive tape layer, and the width of elasticity inoxidizing coating is greater than the width of anticorrosion passivation layer, promptly through set up the anticorrosion passivation layer in clearance department, butyl sealing adhesive tape layer and elasticity inoxidizing coating, thereby prevent that outside corrosion source from getting into through the clearance entering inside fan tower section of thick bamboo, with the inside of protection fan tower section of thick bamboo.
Description
Technical Field
The utility model relates to a wind power equipment field, in particular to anticorrosive structure of wind power tower cylinder flange.
Background
At present, with the rapid development of new energy fields in China, the total installed quantity of wind power is more and more popular. However, in the operation process, the corrosion problem of the wind turbine generator in a long-term natural environment is increasingly serious, the flange corrosion phenomenon occurs in many wind turbine generators, the operation safety of the wind turbine generators is seriously influenced, and meanwhile, the operation and maintenance are stressed due to the difficulty in high-altitude maintenance and implementation.
At present, fan tower section of thick bamboo structure generally adopts the design of bubble cotton packing with waterproof sealing coating, nevertheless at the actual motion in-process, because fan tower section of thick bamboo structure and the different small deformation that causes of concrete expend with heat and contract with cold coefficient, including under the illumination dual function of ageing with higher speed, cause waterproof sealing layer damaged, inefficacy and separation, the inside of fan tower section of thick bamboo is gone into through the gap between the tower section of thick bamboo flange to the corruption source, thereby cause the inside corrosion of fan tower section of thick bamboo, make fan tower section of thick bamboo, tower section of thick bamboo flange all very easily take place to.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an anticorrosive structure of wind power tower cylinder flange has solved the inside of a fan tower section of thick bamboo if going into through the gap between the tower section of thick bamboo flange in the corrosive source to cause the inside corrosion of a fan tower section of thick bamboo, make the problem of all very easily taking place to corrode of a fan tower section of thick bamboo, tower section of thick bamboo flange etc..
In order to achieve the above object, the utility model provides an anticorrosive structure of wind power tower cylinder flange, anticorrosive structure of wind power tower cylinder flange includes:
the tower tube flange structure comprises at least two tower tube flanges, wherein a gap is formed between every two adjacent tower tube flanges;
the corrosion-resistant passivation layer is coated on the outer wall of the tower cylinder flange and is positioned at the gap;
the butyl sealing adhesive tape layer is coated on one side, away from the tower drum flange, of the corrosion-resistant passivation layer;
the elastic protective layer is coated on one side, away from the corrosion-resistant passivation layer, of the butyl sealing adhesive tape layer;
the width of the corrosion-resistant passivation layer is larger than that of the butyl sealing adhesive tape layer, and the width of the elastic protection layer is larger than that of the corrosion-resistant passivation layer.
Furthermore, the thickness range of the corrosion-resistant passivation layer is 0.2 mm-0.5 mm.
Further, the corrosion-resistant passivation layer is a metal corrosion-resistant layer.
Further, the butyl sealing tape layer comprises butyl sealing tape units which are connected together, a joint between every two adjacent butyl sealing tape units is provided with an overlapping area, and the width range of the overlapping area is 30-50 mm.
Further, the thickness range of the butyl sealing tape unit is 1.5 mm-2 mm.
Further, the peel strength of the butyl sealing tape layer is greater than or equal to 510N/m.
Furthermore, the elastic protection layer is a silicone anti-corrosion sealant layer.
Furthermore, the thickness range of the elastic protection layer is 1.5 mm-2 mm, and the width range of the elastic protection layer is 70 mm-80 mm.
Further, the tower cylinder flange is a carbon steel flange.
The utility model provides an anticorrosive structure of wind power tower cylinder flange, wherein, anticorrosive structure of wind power tower cylinder flange includes two at least tower cylinder flanges, hinders and loses passivation layer, butyl sealing adhesive tape layer and elasticity inoxidizing coating; wherein a gap is formed between two adjacent tower drum flanges, the corrosion-resistant passivation layer is coated on the outer wall of each tower drum flange, and is positioned at the gap, the butyl sealing adhesive tape layer is coated on one side of the corrosion-resistant passivation layer departing from the tower drum flange, the elastic protective layer is coated on one side of the butyl sealing adhesive tape layer, which is far away from the corrosion-resistant passivation layer, wherein the width of the corrosion-resistant passivation layer is greater than that of the butyl sealing adhesive tape layer, and the width of the elastic protection layer is greater than that of the corrosion-resistant passivation layer, namely, by arranging the corrosion-resistant passivation layer, the butyl sealing tape layer and the elastic protective layer at the gap, therefore, an external corrosion source is prevented from entering the interior of the fan tower cylinder through the gap, the interior of the fan tower cylinder and the tower cylinder flange are protected from being corroded, and the waterproof and anticorrosive performance is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or examples of the present invention, the drawings used in the embodiments or examples will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an anticorrosion structure of a wind power tower cylinder flange according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a butyl sealing tape layer according to an embodiment of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in figures 1-2, the utility model provides an anticorrosive structure of wind power tower cylinder flange.
In an embodiment, as shown in fig. 1, the anti-corrosion structure of the wind power tower flange includes at least two tower flanges 1, an anti-corrosion passivation layer 2, a butyl sealing tape layer 3, and an elastic protection layer 4; a gap A is formed between every two adjacent tower drum flanges 1, the corrosion inhibiting passivation layer 2 is coated on the outer wall of each tower drum flange 1 and located at the gap A, the butyl sealing adhesive tape layer 3 is coated on one side, away from the tower drum flanges 1, of the corrosion inhibiting passivation layer 2, and the elastic protective layer 4 is coated on one side, away from the corrosion inhibiting passivation layer 2, of the butyl sealing adhesive tape layer 3. The butyl sealing adhesive tape layer 3 partially covers one side of the corrosion-resistant passivation layer 2, which is far away from the tower drum flange 1, and the elastic protection layer 4 completely covers the corrosion-resistant passivation layer 2 and the butyl sealing adhesive tape layer 3, so that better corrosion-resistant and waterproof effects are achieved.
Specifically, the wind power tower cylinder flange at least comprises two wind power tower cylinders, the connecting end of each wind power tower cylinder is correspondingly provided with one tower cylinder flange 1, namely, the tower cylinder flanges 2 arranged on each wind power tower cylinder are connected, and therefore the connection of the wind power tower cylinders is achieved. It is understood that the wind turbine tower flange in the present embodiment includes three wind turbine towers, and of course, the number of wind turbine towers is not limited in other embodiments.
Further, the corrosion-resistant passivation layer 2, the butyl sealing tape layer 3 and the elastic protection layer 4 are stacked, and the corrosion-resistant passivation layer 2 is arranged on the outer wall of the tower drum flange 1. The corrosion-resistant passivation layer 2 is located in a gap a formed between two adjacent tower flanges 1, that is, the corrosion-resistant passivation layer 2 is configured to prevent an external corrosion source from entering the inside of the wind turbine tower through the gap a, so that the inside of the wind turbine tower is corroded. It can be understood that, the corrosion-resistant passivation layer 2 is still configured as the face of pasting of butyl sealing adhesive tape layer 3, and above-mentioned face of pasting does promptly the corrosion-resistant passivation layer 2 deviates from the surface of tower section of thick bamboo flange 1, so that butyl sealing adhesive tape layer 3's adhesion to further prevent that outside corrosion source from getting into through inside clearance A gets into the fan tower section of thick bamboo, improve waterproof performance, in order to protect the inside of fan tower section of thick bamboo and the tower section of thick bamboo flange is not corroded, thereby strengthen the bearing strength of fan tower section of thick bamboo, improve the fan tower section of thick bamboo and the life of tower section of thick bamboo flange 1.
Further, in order to enable the fan tower cylinder to achieve a better anti-corrosion effect, the width of the butyl sealing adhesive tape layer 3 is smaller than the width of the corrosion-resistant passivation layer 2, that is, part of the butyl sealing adhesive tape layer 3 is attached to the corrosion-resistant passivation layer 2, and the butyl sealing adhesive tape layer 3 is attached to the gap a, so that the gap a is subjected to double water prevention through the matching of the corrosion-resistant passivation layer 2 and the butyl sealing adhesive tape layer 3, and the anti-corrosion effect is improved.
Further, the width of the corrosion-resistant passivation layer 2 is smaller than the width of the elastic protection layer 4, that is, the elastic protection layer 4 completely covers the elastic protection layer 4, and the corrosion-resistant passivation layer 2 exposed by the butyl sealing tape layer 3, so that the corrosion-resistant passivation layer 2, the butyl sealing tape layer 3 and the elastic protection layer 4 form an integrally sealed protection layer, thereby further increasing the corrosion-resistant and waterproof performance. For example, the anti-corrosion structure of the wind power tower cylinder flange does not crack or fall off in acid-base solution, salt mist, acid mist and other environments, and the surfaces of the corrosion-resistant passivation layer 2, the butyl sealing adhesive tape layer 3 and the elastic protection layer 4 are not rusted.
Further, the tower cylinder flange 1 is a carbon steel flange. Of course, in other embodiments, the tower flange 1 may also be made of other materials, and is not limited herein.
In the embodiment of the present invention, the anti-corrosion structure of the wind power tower cylinder flange comprises at least two tower cylinder flanges 1, an anti-corrosion passivation layer 2, a butyl sealing adhesive tape layer 3 and an elastic protection layer 4; wherein, a gap is formed between two adjacent tower drum flanges 1, the corrosion-resistant passivation layer 2 is coated on the outer wall of the tower drum flange 1 and is located at the gap 1, the butyl sealing adhesive tape layer 3 is coated on one side of the corrosion-resistant passivation layer 2 departing from the tower drum flange 1, the elastic protective layer 4 is coated on one side of the butyl sealing adhesive tape layer 3 departing from the corrosion-resistant passivation layer 2, wherein the width of the corrosion-resistant passivation layer 2 is greater than that of the butyl sealing adhesive tape layer 3, and the width of the elastic protective layer 4 is greater than that of the corrosion-resistant passivation layer 2, namely, the corrosion-resistant passivation layer 2, the butyl sealing adhesive tape layer 3 and the elastic protective layer 4 are arranged at the gap 1, so that an external corrosion source is prevented from entering the inside of the fan tower drum through the gap to protect the inside of the fan tower drum and the tower drum flanges from being corroded, thereby improving the waterproof and anticorrosive performance.
Further, in this embodiment, the corrosion-resistant passivation layer 2 has a single-layer structure, that is, only one layer of the corrosion-resistant passivation layer 2 needs to be coated on the outer wall of the gap of the tower flange 1, and taking the corrosion-resistant passivation layer 2 as a single-layer structure as an example, the thickness of the corrosion-resistant passivation layer ranges from 0.2mm to 0.5 mm. Optionally, the thickness of the etch stop passivation layer 2 is 0.3 mm. However, in other embodiments, the thickness of the etch stop passivation layer 2 may be set to other values according to the viscosity or performance of the etch stop passivation layer 2, and is not limited herein.
It should be understood that, in this embodiment, the corrosion-resistant passivation layer 2 may also be a two-layer structure, that is, two layers of the corrosion-resistant passivation layer 2 are coated on the outer wall of the gap of the tower flange 1, which is not limited in particular.
Optionally, the corrosion-inhibiting passivation layer 2 is a metal corrosion-inhibiting layer, and a metal material specifically adopted by the metal corrosion-inhibiting layer may be set according to specific requirements, which is not limited herein.
Further, as shown in fig. 2, the butyl sealing tape layer 3 includes butyl sealing tape units 31 connected together, a joint between two adjacent butyl sealing tape units 31 has an overlap area 32, and a width of the overlap area 32 ranges from 30mm to 50 mm. The butyl sealing tape unit 31 is a sealing tape which does not generate fog, is not vulcanized and has permanent plasticity, can keep the plasticity and the sealing performance within a preset temperature range, has no surface cracking and no hardening, has good adhesion performance, high temperature resistance and chemical performance, and is not easy to become brittle or press into fragments, so that the wind turbine tower cylinder keeps good air tightness and water tightness. In this embodiment, the predetermined temperature range may be-45 ℃ to 100 ℃, and is not limited herein.
Further, a glass fiber viscoelastic body adhesive tape layer (not shown) may be coated between the butyl sealing adhesive tape layer 3 and the elastic protection layer 4 to further increase the corrosion resistance and the water resistance and the deformation resistance of the wind turbine tower.
Further, in order to ensure the viscosity and the barrier property of the butyl sealing tape unit 31, the thickness of the butyl sealing tape unit 31 ranges from 1.5mm to 2 mm. Optionally, the butyl sealing tape unit 31 has a thickness of 2 mm. Of course, in other embodiments, the thickness of the butyl sealing tape unit can be set to other values, and is not limited herein.
Further, in this embodiment, the peel strength of the butyl sealing tape layer 3 is greater than or equal to 510N/m, that is, the adhesive force of the butyl sealing tape layer 3 is high, and it can be ensured that the anticorrosion structure of the wind power tower cylinder flange does not fail in the life cycle.
Further, the elastic protection layer 4 is a silicone anti-corrosion sealant layer, and the silicone anti-corrosion sealant layer is an elastic sealant layer with low viscosity, neutral curing at room temperature, water resistance, corrosion resistance, weather resistance and other functions. Namely, the silicone anticorrosion sealant layer is suitable for the joint of the tower cylinder flange 1.
Further, the distance from any edge of the elastic protection layer 4 to the edge on the same side of the corrosion inhibiting passivation layer 2 is greater than or equal to 10 mm.
Further, in order to ensure that a corrosive medium which is waterproof and prevents an atmospheric environment enters the gap, the elastic protection layer 4 is set to be a double-layer structure, that is, two layers of the elastic protection layer 4 are required to be coated on the butyl sealing adhesive tape layer 3, the corrosion-resistant passivation layer 2 exposed from the butyl sealing adhesive tape layer 3, and part of the outer wall of the tower cylinder flange 1. In this embodiment, the thickness range of the elastic protection layer 4 is 1.5mm to 2mm, and the width range of the elastic protection layer 4 is 70mm to 80 mm.
Optionally, the thickness of the elastic protection layer 4 is 2mm, and the width of the elastic protection layer 4 is 80 mm. Of course, in other embodiments, the thickness and the width of the elastic protection layer 4 may be set to other values, and are not limited herein.
The following explains the anti-corrosion structure of the wind power tower flange in detail: firstly, grinding, cleaning and dewatering the gaps formed on the tower drum flange 1 and the peripheral surface of the fan tower drum; after polishing, cleaning and water removal are finished, coating an anti-corrosion passivation layer 2 on the outer wall of the fan tower at the gap, wherein before the anti-corrosion passivation layer 2 is coated, an MF1102G viscoelastic body can be filled into the gap; after the corrosion-resistant passivation layer 2 is coated, attaching the butyl sealing adhesive tape layer 3 to the corrosion-resistant passivation layer 2 and rolling; coating the elastic protection layer 4 on the rolled butyl sealing adhesive tape layer 3, wherein the elastic protection layer 4 needs to completely cover the butyl sealing adhesive tape layer 3, the exposed corrosion-resistant passivation layer 2 of the butyl sealing adhesive tape layer 3 and part of the outer wall of the tower flange 1; and finally, checking and accepting, namely checking the bonding and sealing performance of the material and checking and accepting the waterproof and anti-leakage effects. The construction in this embodiment is simple, swift promptly, easily controls engineering quality, needs longer curing time between every process of traditional spraying technology, and the work progress of the anticorrosive structure that this embodiment provided only needs about an hour to coat a tower section of thick bamboo flange once.
It can be understood that, the anti-corrosion structure of the wind power tower flange of this embodiment is not limited to the gap formed between two adjacent tower flanges, and the anti-corrosion structure of the wind power tower flange can also be applied to other parts of the wind power equipment, that is, the anti-corrosion structure of the wind power tower flange is applicable to the junction of two parts, such as: the gap of formation between fan bolt, foundation ring, wheel hub etc to under each part receives the condition of environmental factor influence, the boundary layer of juncture is destroyed very easily, produces the gap, thereby causes wind power equipment's anticorrosive and waterproof performance to descend.
In the embodiment of the present invention, the anti-corrosion structure of the wind power tower cylinder flange comprises at least two tower cylinder flanges 1, an anti-corrosion passivation layer 2, a butyl sealing adhesive tape layer 3 and an elastic protection layer 4; wherein, a gap is formed between two adjacent tower drum flanges 1, the corrosion-resistant passivation layer 2 is coated on the outer wall of the tower drum flange 1 and is located at the gap 1, the butyl sealing adhesive tape layer 3 is coated on one side of the corrosion-resistant passivation layer 2 departing from the tower drum flange 1, the elastic protective layer 4 is coated on one side of the butyl sealing adhesive tape layer 3 departing from the corrosion-resistant passivation layer 2, wherein the width of the corrosion-resistant passivation layer 2 is greater than that of the butyl sealing adhesive tape layer 3, and the width of the elastic protective layer 4 is greater than that of the corrosion-resistant passivation layer 2, namely, the corrosion-resistant passivation layer 2, the butyl sealing adhesive tape layer 3 and the elastic protective layer 4 are arranged at the gap 1, so that an external corrosion source is prevented from entering the inside of the fan tower drum through the gap to protect the inside of the fan tower drum and the tower drum flange from being corroded, thereby improving the waterproof and anticorrosive performance.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the concepts of the present invention utilize the equivalent transformation made by the contents of the specification and the drawings, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The utility model provides an anticorrosive structure of wind power tower cylinder flange which characterized in that, anticorrosive structure of wind power tower cylinder flange includes:
the tower tube flange structure comprises at least two tower tube flanges, wherein a gap is formed between every two adjacent tower tube flanges;
the corrosion-resistant passivation layer is coated on the outer wall of the tower cylinder flange and is positioned at the gap;
the butyl sealing adhesive tape layer is coated on one side, away from the tower drum flange, of the corrosion-resistant passivation layer;
the elastic protective layer is coated on one side, away from the corrosion-resistant passivation layer, of the butyl sealing adhesive tape layer;
the width of the corrosion-resistant passivation layer is larger than that of the butyl sealing adhesive tape layer, and the width of the elastic protection layer is larger than that of the corrosion-resistant passivation layer.
2. The anti-corrosion structure of the wind tower flange as claimed in claim 1, wherein the thickness of the corrosion-resistant passivation layer ranges from 0.2mm to 0.5 mm.
3. The anti-corrosion structure of the wind tower flange as claimed in claim 2, wherein the corrosion-inhibiting passivation layer is a metal corrosion-inhibiting layer.
4. The anti-corrosion structure for the wind power tower flange as claimed in claim 1, wherein the butyl sealing tape layer comprises butyl sealing tape units connected together, a joint between two adjacent butyl sealing tape units has an overlapping area, and the width of the overlapping area ranges from 30mm to 50 mm.
5. The anti-corrosion structure of the wind tower flange as claimed in claim 4, wherein the butyl sealant tape unit has a thickness ranging from 1.5mm to 2 mm.
6. The anti-corrosion structure of a wind tower flange according to claim 5, wherein the peel strength of the butyl sealing tape layer is greater than or equal to 510N/m.
7. The anti-corrosion structure of the wind tower flange according to claim 1, wherein the elastic protective layer is a silicone anti-corrosion sealant layer.
8. The anti-corrosion structure of the wind power tower flange as claimed in claim 7, wherein the thickness of the elastic protection layer ranges from 1.5mm to 2mm, and the width of the elastic protection layer ranges from 70mm to 80 mm.
9. The anti-corrosion structure of a wind tower flange as claimed in claim 1, wherein the tower flange is a carbon steel flange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020380808.8U CN212250332U (en) | 2020-03-23 | 2020-03-23 | Anti-corrosion structure of wind power tower cylinder flange |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020380808.8U CN212250332U (en) | 2020-03-23 | 2020-03-23 | Anti-corrosion structure of wind power tower cylinder flange |
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| CN212250332U true CN212250332U (en) | 2020-12-29 |
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| CN202020380808.8U Active CN212250332U (en) | 2020-03-23 | 2020-03-23 | Anti-corrosion structure of wind power tower cylinder flange |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754198A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气集团有限公司 | Corrosion prevention method and structure of pipeline connecting fastener |
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2020
- 2020-03-23 CN CN202020380808.8U patent/CN212250332U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754198A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气集团有限公司 | Corrosion prevention method and structure of pipeline connecting fastener |
| CN114754198B (en) * | 2021-01-08 | 2024-04-30 | 中国石油天然气集团有限公司 | Corrosion prevention method and structure of pipeline connecting fastener |
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