CN101140042B - Corrosion proof structure of pipeline through wall or through ground - Google Patents
Corrosion proof structure of pipeline through wall or through ground Download PDFInfo
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- CN101140042B CN101140042B CN2007100767244A CN200710076724A CN101140042B CN 101140042 B CN101140042 B CN 101140042B CN 2007100767244 A CN2007100767244 A CN 2007100767244A CN 200710076724 A CN200710076724 A CN 200710076724A CN 101140042 B CN101140042 B CN 101140042B
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Abstract
The invention discloses an anti-corrosion structure for a through-wall or through-ground pipeline; wherein the pipeline passes through the wall or ground, and the position near the wall or ground of the outer wall of the pipeline is provided with a flow guide body preventing the liquid from accumulating in a through-wall or through-ground hole, thereby effectively preventing the corrosive medium from entering the gap in order to avoid generating the gap. For the through-wall pipeline of no fireproof sealing requirements, the flow guide flow body can be arranged in the gap between the pipeline and the wall, and therefore the liquid can unhinderedly flow away from the gap and can not generate the accumulation. For the through-wall or through-ground pipeline of fireproof sealing requirements, the flow guide body can be sleeved on the outer wall of the pipeline, one end edge of the flow guide body is in contact with the pipeline, the external surface of the flow guide body extends towards the wall or ground direction from the end edge and simultaneously towards the direction far away from the central axle line of the pipeline, and therefore the flow guide body can guide the liquid to flow away through the external surface in order to facilitate the liquid far away from the through-wall or through-ground hole.
Description
Technical field
The present invention relates to a kind of anticorrosive measure of fluid-transporting tubing, relate in particular to a kind of through walls or wear ground pipeline anti-corrosion structure.
Background technique
At present in many occasions; The pipeline of conveyance fluid need pass wall or ground, the seawater conveyance conduit of nuclear power station for example, and its pipeline many places are in dark moist gallery or melt pit; These environment have very strong corrosivity; Especially pipeline passes the through hole on wall or ground, and Korrosionsmedium is assembled easily, and the risk that crevice corrosion takes place is arranged.Crevice corrosion be meant when metal and metal or metal and nonmetal between when having very little slit (being generally 0.25-0.1mm), medium is difficult for flowing and forms and is detained the phenomenon of the metal accelerated corrosion in the promotion slit in the slit in.
Most of industrial metals or alloy all possibly produce crevice corrosion; With the seawater of nuclear power station through walls or wear ground pipeline be example; The anticorrosive measure that nuclear power station adopts at present is the inner line with rubber of carbon steel; Outside anti-corrosion method with corrosion-inhibiting coating is at wall-through hole or wear place, hole, ground and adopt fireproof blocking or clay to seal.Seawater through walls or wear the residing corrosive environment of working time, equipment of ground Corrosion of Pipeline degree and equipment and the factors such as anti-corrosion measure that adopted relevant.Seawater through walls or wear ground Corrosion of Pipeline; Show as at wall-through hole or wear the effective thickness attenuate of hole place, ground tube wall, serious meeting causes the corrosive pipeline perforation, influences the normal operation of equipment; If the seawater pipeline corrosion failure of the system relevant with nuclear safety also can cause unit outage.
At present the nuclear power station wall-through hole or the structure of wearing place, hole, ground are respectively like Fig. 1 and shown in Figure 2, and pipeline 10 is arranged in wall 20 or the ground 30, and liquid 100 is easily at wall-through hole or wear place, hole, ground and gather, and might infiltrate in the environment of slit the generation that gaps and corrode.Above-mentioned seawater is through walls or wear ground pipeline generation reason for corrosion, and the one, because seawater is through walls or wear the ground pipeline and mostly be in the dark moist gallery or melt pit, have a large amount of stronger Korrosionsmediums in the environment, like O
2, Cl
-Deng; The 2nd, because wall-through hole or to wear the combination force of concrete or clay and metallic conduit at hole place, ground relatively poor; Perhaps concrete is because phenomenons such as cracking, efflorescence have taken place in the operation time limit for a long time; Like this at wall-through hole or wear hole place, ground and will produce the slit, for the entering of Korrosionsmedium provides condition.The source of Korrosionsmedium is: underground water of sparge water, water of condensation and the seepage hydrophobic, that use when remaining in seawater in the equipment, repair apparatus of equipment etc., and the complicated component of water in the melt pit, corrosivity is strong.
After above-mentioned Korrosionsmedium gets into wall-through hole or wears the slit in hole, ground; Though there is the corrosion-inhibiting coating protection outside of pipeline 10; But because the solvent evaporates in the coating in the Dry run after construction; Be easy in coating, form pin hole, Korrosionsmedium gets in the environment of slit and can contact with metallic matrix through pin hole, causes the metallic matrix corrosion.The corrosion primary stage, the inside and outside homogeneous corrosion that oxygen depolarization takes place in slit.Because the medium in the slit can not convective flow, the diffusion of oxygen replenishes difficult, and oxygen reduction reaction progressively stops.Just having constituted macroscopical oxygen concentration cell subsequently, is to be negative electrode outside anode, the seam in the seam of anoxic.Because much little, so at the solubilizing reaction Fe → Fe of anode generation metal as the seam internal area ratio of anode seam outer area
2++ 2e; And take place at negative electrode
Reaction.The corrosion products of cathode and anode meets the formation secondary product and deposits the metal cations Fe that produce in the slit this moment at sealing
2+Be difficult to the interior positive charge of seam increased, Cl must be arranged toward the slit external diffusion
-Migration is come in to keep charge balance (electronegative OH
-Also possibly move into, but their migration velocity compares Cl
-Slowly many).Metal chloride concentration in the result stitches constantly increases the further hydrolytic reactions (Fe of chloride
2++ 2H
2O → Fe (OH)
2↓+2H
+) insoluble hydroxide of generation and free acid.The existence of free acid can destroy the passivating film of metal surface, and quickens the corrosion of metallic matrix.The final seawater that just caused is through walls or wear the ground pipeline at wall-through hole or wear the heavy corrosion at place, hole, ground.
How to improve through walls or wear the ground pipeline at wall-through hole or wear the corrosion protection design at hole place, ground, become and avoid through walls or wear the ground corrosive pipeline losing efficacy and being badly in need of a key issue solving.
Summary of the invention
It is a kind of through walls or wear the anti-corrosion structure of ground pipeline that technical problem to be solved by this invention is to provide, and it can prevent effectively that Korrosionsmedium from getting into the slit, thereby avoids corrosion pipeline.
The present invention realizes like this; A kind of through walls or wear ground pipeline anti-corrosion structure; Said pipeline is arranged in wall or the ground, is provided with in the position near wall or ground in the outer wall of pipeline and avoids fluid accumulation at wall-through hole or wear the deflector at place, hole, ground.
Owing to set up deflector at pipeline near the position on wall or ground, said deflector can avoid liquid at wall-through hole or wear place, hole, ground and gather, thereby prevents that effectively Korrosionsmedium from getting into the slit, avoids taking place crevice corrosion.
For the pipeline through walls that no fireproof blocking requires, said pipeline is arranged in the wall, and said deflector can be the gap that is arranged at pipeline and between the walls.Like this, liquid can unhinderedly flow away from this gap, can not gather.
For the through walls of fireproof blocking requirement being arranged or wearing the ground pipeline; Said deflector can be sheathed on pipeline outer wall; One of them ora terminalis and the tube contacts of deflector, the outer surface of deflector extends to the direction on wall or ground from this ora terminalis, extends to the direction away from the pipeline medial axis simultaneously.Like this, deflector can flow away by sharp its outer surface guiding liquids, makes liquid away from wall-through hole or wear the hole, ground.
Description of drawings
Fig. 1 is that existing pipeline through walls is in the structural representation at wall-through hole place.
Fig. 2 is that the existing ground pipeline of wearing is in the structural representation of wearing place, hole, ground.
Fig. 3 be in the present invention's first preferred embodiment pipeline through walls in the structural representation at wall-through hole place.
Fig. 4 wears the ground pipeline in the structural representation of wearing place, hole, ground in the present invention's second preferred embodiment.
Fig. 5 be in the present invention's the 3rd preferred embodiment pipeline through walls in another structural representation at wall-through hole place.
Embodiment
In order to make technical problem to be solved by this invention, technological scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 3, be in first preferred embodiment of the present invention pipeline through walls in the structural representation at wall-through hole place.Pipeline 1 is arranged in the wall 2, for the pipeline through walls that the fireproof blocking requirement is arranged, in the gap of pipeline 1 and wall 2, is filled with fire-proof sealing material 3.Outer wall in pipeline 1 is arranged with a deflector 4 in the position near wall 2, said deflector 4 can by have water proofing property and adhesiveness preferably material process, sealer etc. for example, its material can be identical with above-mentioned fire-proof sealing material 3.The outer surface 41 of deflector 4 is the inclined-plane; One of them ora terminalis of deflector 4 (being the edge of outer surface 41) contacts with pipeline 1 outer wall; The outer surface of deflector 4 extends to the direction of wall 2 from above-mentioned ora terminalis; Extend to the direction away from the medial axis of pipeline 1 simultaneously, and extend to wall 2 surfaces, promptly deflector 4 another ora terminalis relative with above-mentioned ora terminalis are attached at wall 2 surfaces.
Because the outer surface 41 of deflector 4 is the inclined-plane, therefore, deflector 4 can utilize its outer surface 41 guiding liquids flow away (like the direction of arrow among Fig. 3); Make liquid away from wall-through hole; Avoid liquid to gather, thereby prevent that effectively Korrosionsmedium from getting into the slit, avoids taking place crevice corrosion at the wall-through hole place.
Occasion for pipeline is worn ground can be provided with above-mentioned deflector near the position on ground at pipeline outer wall equally, flows away with guiding liquids, avoids liquid to gather wearing place, hole, ground.Be appreciated that; The form of the outer surface 41 of above-mentioned deflector 4 is not limited to the inclined-plane; It also can be designed to cambered surface or other curved surfaces; If ora terminalis of this deflector and tube contacts, and its outer surface extends to wall or ground direction from this ora terminalis, gets final product to extending away from the direction of pipeline medial axis simultaneously.
Further improvement as above-mentioned mode of execution sees also Fig. 4, is to wear the ground pipeline in the present invention's second preferred embodiment in the structural representation of wearing place, hole, ground.Pipeline 1 is arranged in the ground 5, and 5 are provided with a step 6 in ground, and said step 6 is sheathed on pipeline 1 outer wall, on step 6, further is provided with a deflector 4.Said step 6 can be by having certain elasticity, not easy to crack; Have impermeability, can prevent the corrosive liquids infiltration; And process with metal or the good material of coating surface binding ability, for example neoprene mortar, asphalt mortar, bituminous mortar etc. are in this enforcement; This step 6 is processed by the neoprene mortar, what promptly a certain amount of neoprene of adding was processed in the mortar.The material of said deflector 4 is identical with the material of middle deflector 4 embodiment illustrated in fig. 3; Its outer surface 41 also is the inclined-plane; One of them ora terminalis of deflector 4 contacts with pipeline 1; Outer surface 41 extends to the direction away from the pipeline medial axis simultaneously, and extends to step 6 surfaces from the 5 directions extension earthward of this ora terminalis.
In the foregoing description, owing to set up step 6, its dash is higher, and pipeline 1 is difficult for being soaked by the ponding on the ground 2, can prevent the contacting point on ponding corrosion pipeline 1 and ground 2 on the ground 2.On the other hand, the intensity of step 6 is higher, and is not fragile, and step 6 has impermeability and elasticity preferably, can prevent that pipeline 1 vibration etc. from causing mortar to crack.In addition, step 6 also has stronger warning effect.
Above-mentioned first, second preferable enforcement all is applicable to the through walls of fireproof blocking requirement or wears the ground pipeline; See also Fig. 5; Be the 3rd preferred embodiment of the present invention, said pipeline 1 is arranged in the wall 2, and said deflector 4 is the gaps 7 that are arranged between pipeline 1 and the wall 2.It is applicable to the pipeline through walls of no fireproof blocking requirement, between pipeline 1 and wall 2, has gap 7, and liquid can unhinderedly flow away from this gap 7, and Korrosionsmedium forms crevice corrosion with regard to can in the slit, not gathering like this.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
- One kind through walls or wear the anti-corrosion structure of ground pipeline, said pipeline is arranged in wall or the ground, it is characterized in that: be provided with in the position near wall or ground in the outer wall of said pipeline and avoid fluid accumulation at wall-through hole or wear the deflector at place, hole, ground.
- 2. as claimed in claim 1 through walls or wear ground pipeline anti-corrosion structure, it is characterized in that: said pipeline is arranged in the wall, said deflector is the gap that is arranged at pipeline and between the walls.
- 3. as claimed in claim 1 through walls or wear ground pipeline anti-corrosion structure; It is characterized in that: said deflector is sheathed on pipeline outer wall; One of them ora terminalis and the tube contacts of deflector; The outer surface of deflector extends to the direction on wall or ground from said ora terminalis, extends to the direction away from the pipeline medial axis simultaneously.
- 4. as claimed in claim 3 through walls or wear ground pipeline anti-corrosion structure, it is characterized in that: another ora terminalis that said deflector is relative with above-mentioned ora terminalis is attached on wall or the ground.
- 5. as claimed in claim 3 through walls or wear ground pipeline anti-corrosion structure; It is characterized in that: said wall or ground are provided with a step; Said step is sheathed on said pipeline outer wall, and another ora terminalis that said deflector is relative with above-mentioned ora terminalis is attached on the said step.
- 6. as claimed in claim 5 through walls or wear the anti-corrosion structure of ground pipeline, it is characterized in that: said step is by having elasticity and impervious material is processed.
- 7. as claimed in claim 6 through walls or wear ground pipeline anti-corrosion structure, it is characterized in that: said step is processed by neoprene mortar or asphalt mortar, bituminous mortar.
- As in the claim 3 to 7 any one described through walls or wear the anti-corrosion structure of ground pipeline, it is characterized in that: said deflector is by having water proofing property and fusible material is processed.
- 9. as claimed in claim 8 through walls or wear ground pipeline anti-corrosion structure, it is characterized in that: said deflector is processed by colloid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100767244A CN101140042B (en) | 2007-08-28 | 2007-08-28 | Corrosion proof structure of pipeline through wall or through ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100767244A CN101140042B (en) | 2007-08-28 | 2007-08-28 | Corrosion proof structure of pipeline through wall or through ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101140042A CN101140042A (en) | 2008-03-12 |
| CN101140042B true CN101140042B (en) | 2012-05-09 |
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|---|---|---|---|
| CN2007100767244A Active CN101140042B (en) | 2007-08-28 | 2007-08-28 | Corrosion proof structure of pipeline through wall or through ground |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107060115A (en) * | 2017-04-24 | 2017-08-18 | 中建二局第二建筑工程有限公司华东分公司 | A kind of combustion gas hole plugging system and its plugging construction method |
| CN114024275A (en) * | 2021-11-09 | 2022-02-08 | 深圳供电局有限公司 | GIL wall-penetrating protection structure |
| CN116047694B (en) * | 2023-03-31 | 2023-06-16 | 安徽博达项目管理咨询有限公司 | Optical cable fireproof channel system |
Citations (4)
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|---|---|---|---|---|
| US5116413A (en) * | 1988-06-03 | 1992-05-26 | Waterproof Coatings S.A. | Process and sealing agent for producing a watertight and/or gastight bushing of lines in a water-resistant and/or gas-blocking wall, and device for use thereof |
| DE19647242A1 (en) * | 1996-01-19 | 1997-07-24 | Promat Gmbh | Fireproof seal between exterior of pipe and passage hole through wall or ceiling |
| CN2725679Y (en) * | 2004-07-27 | 2005-09-14 | 熊智 | Guiding protection device of gas flexible pipe |
| CN2876492Y (en) * | 2005-11-25 | 2007-03-07 | 熊智 | Protective tube of fuel gas pipe |
-
2007
- 2007-08-28 CN CN2007100767244A patent/CN101140042B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5116413A (en) * | 1988-06-03 | 1992-05-26 | Waterproof Coatings S.A. | Process and sealing agent for producing a watertight and/or gastight bushing of lines in a water-resistant and/or gas-blocking wall, and device for use thereof |
| DE19647242A1 (en) * | 1996-01-19 | 1997-07-24 | Promat Gmbh | Fireproof seal between exterior of pipe and passage hole through wall or ceiling |
| CN2725679Y (en) * | 2004-07-27 | 2005-09-14 | 熊智 | Guiding protection device of gas flexible pipe |
| CN2876492Y (en) * | 2005-11-25 | 2007-03-07 | 熊智 | Protective tube of fuel gas pipe |
Non-Patent Citations (6)
| Title |
|---|
| JP平8-21592A 1996.01.23 |
| JP昭54-143913A 1979.11.09 |
| 刘飞华,任爱,杨帆,费克勋,白容国.核电站海水冷却系统的腐蚀与防腐蚀设计.腐蚀与防护28 6.2007,28(6),313-316. |
| 刘飞华,任爱,杨帆,费克勋,白容国.核电站海水冷却系统的腐蚀与防腐蚀设计.腐蚀与防护28 6.2007,28(6),313-316. * |
| 王积明,付淼磊,钟翔.大亚湾核电站建/构筑物的腐蚀问题.腐蚀与防护26 8.2005,26(8),358-360. |
| 王积明,付淼磊,钟翔.大亚湾核电站建/构筑物的腐蚀问题.腐蚀与防护26 8.2005,26(8),358-360. * |
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|---|---|
| CN101140042A (en) | 2008-03-12 |
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Owner name: GUANGDONG NUCLEAR POWER JOINT CO., LTD. Free format text: FORMER OWNER: DAYAWAN NUCLEAR POWER RUNNING MANAGEMENT CO., LTD. Effective date: 20141027 |
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Effective date of registration: 20141027 Address after: 518031 Guangdong city of Shenzhen province Futian District science and technology building, Shangbu Road 15 Patentee after: Guangdong Nuclear Power Joint Venture Co., Ltd Address before: 518031 Guangdong city of Shenzhen province Futian District science and technology building, Shangbu road 18 Patentee before: Dayawan Nuclear Power Running Management Co., Ltd. |