CN209960024U - Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe - Google Patents
Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe Download PDFInfo
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- CN209960024U CN209960024U CN201920535008.6U CN201920535008U CN209960024U CN 209960024 U CN209960024 U CN 209960024U CN 201920535008 U CN201920535008 U CN 201920535008U CN 209960024 U CN209960024 U CN 209960024U
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Abstract
A seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe belongs to the technical field of reinforced concrete pipes. The concrete pipe comprises a socket, a spigot, a concrete pipe body, annular reinforcing steel bars, longitudinal reinforcing steel bars and a concrete pipe base with a flat bottom, and is characterized in that an anti-corrosion coating layer resisting seawater corrosion is compounded on the inner wall of the concrete pipe body; or the inner and outer walls of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion; or the outer wall of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or sprayed with an anti-corrosion coating layer which resists seawater corrosion. The utility model discloses it has anti seawater corrosion's anticorrosive coating layer at integrative reinforced concrete special-shaped composite pipe of pipe base and the soil that contains the sea water medium or with the surface recombination of sea water direct contact to make it bury underground and can resist the corruption of sea water in the beach, eliminate the sea water and have destructive hidden danger to reinforced concrete pipe engineering quality.
Description
Technical Field
The utility model belongs to the technical field of the reinforced concrete pipe, concretely relates to integrative reinforced concrete special-shaped composite pipe of anti sea water corrosion's pipe base.
Background
The coastline of China is as long as 1.8 kilometers, the coastline is the fourth place in the world, the coastal beach area is wide, the island-star-check is arranged, more than 6500 islands with more than 500 square meters are arranged, and the total area is 6600 square meters with more than k square meters. Because the development of coastal beaches and islands has great significance for building the strong country of ocean economy, the quantity of the reinforced concrete pipes buried in the beaches is increased greatly in China at present. However, the seawater contains a large amount of salt (NaCl), chloride ions (Cl-) and other harmful components to the reinforced concrete, and the reinforced concrete pipe is contacted with the media such as chloride ions, carbonic acid and the like in the seawater, so that the concrete is damaged layer by layer from the outside to the inside. The seawater can also promote the hydrolysis of calcium silicate hydrate and calcium aluminate hydrate, thereby destroying gel with a gap structure, reducing the strength of concrete, and directly destroying a passivation layer on the surface of a reinforcing steel bar to form electrochemical corrosion of a battery, and the pH value is rapidly reduced; harmful ions such as magnesium ions and sulfate ions in seawater form pores in the steel bars, so that the volume of the steel bars in the concrete expands after being corroded, according to introduction of related information, the maximum volume expansion of the steel bars in the member can reach 2.5 times after being corroded, and the concrete cracks due to the volume expansion of the steel bars in the member; the porosity of the concrete is increased under the repeated washing of seawater on the pipeline, the probability of chloride ions permeating into the concrete is increased, the reinforcing steel bars are corroded, the concrete is cracked and peeled off, the pipeline can be corroded after a long time, serious future troubles are brought to the pipeline, and destructive hidden dangers exist to the engineering quality.
The reinforced concrete pipes in the prior art have a plurality of types of reinforced concrete pipes with anticorrosion functions aiming at industrial sewage and wastewater, but the reinforced concrete pipes specially aiming at seawater corrosion have fresh reports. Therefore, it is necessary to develop a reinforced concrete pipe specially for seawater corrosion.
Disclosure of Invention
The utility model aims at the disadvantage that prior art exists, an integrative reinforced concrete special-shaped composite pipe of anti sea water corrosion's pipe base is provided, it is compound on the surface that it has anti sea water corrosion's anticorrosive coating layer at integrative reinforced concrete special-shaped composite pipe of pipe base and the soil that contains the sea water medium or with sea water direct contact, thereby make bury underground in the soil that contains the sea water medium and carry the corruption of the harmful medium of sea water can be resisted to the integrative reinforced concrete special-shaped pipe of pipe base of sea water, eliminate the sea water and exist destructive hidden danger to integrative reinforced concrete special-shaped pipe engineering quality of pipe base, ensure the integrative reinforced concrete special-shaped pipe engineering quality of pipe base.
The invention aims to solve the technical scheme that the seawater corrosion resistant pipe base integrated reinforced concrete special-shaped composite pipe comprises a bellmouth, a spigot, a concrete pipe body, annular reinforcing steel bars, longitudinal reinforcing steel bars and a concrete pipe base with a flat bottom, and is characterized in that an anti-corrosion coating layer for resisting seawater corrosion is compounded on the inner wall of the concrete pipe body; or the inner and outer walls of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion; or the outer wall of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion.
Preferably, the anti-corrosion coating layer is formed by coating or mechanically spraying a diluent added with a two-component coating on the seawater corrosion resistant surface required by the pipe-based integrated reinforced concrete special-shaped composite pipe; the two-component coating is prepared by blending a component A and a component B according to the weight ratio of 1: 1-2, wherein the component A is an IPN 8710-3 thick paste type interpenetrating network anticorrosive coating prepared from polyurethane, modified epoxy resin, asphalt, antirust pigment and an auxiliary agent, and the component B is a curing agent.
Preferably, the concrete pipe body is a concrete circular pipe body; the inner and outer walls of the round concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion.
Preferably, the concrete pipe body is a concrete circular pipe body; the concrete pipe body is a concrete circular pipe body; the outer wall of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or sprayed with an anti-corrosion coating layer which resists seawater corrosion.
Compared with the prior art, the utility model following beneficial effect has: compared with a reinforced concrete pipe with a circular structure, the pipe-based integrated reinforced concrete special-shaped composite pipe in the prior art is greatly improved, because the bottom of the circular reinforced concrete pipe is of the circular structure, the pipe is buried underground, because the pipe bears the pressure of the self weight of the pipeline, the weight pressure of liquid in the pipe, the pressure of groove soil covering load, the automobile load pressure on the road surface of the pipe top and the like, the bottom section of the circular structure is only stressed at one point, and pipeline cracks are easily generated due to overlarge bearing capacity and collapse. During engineering construction, in order to improve the bearing capacity of the pipeline, reinforced concrete arc-shaped pipe seats are usually poured on two sides of the pipeline for reinforcement, reinforced concrete materials, templates and labor cost for pipeline construction are increased invisibly, and the construction period is prolonged. The pipe-base integrated reinforced concrete special pipe is characterized in that a flat pipe base with a pipe base is manufactured at the bottom of a common circular pipe, so that a circular pipe and the pipe base are connected into a whole, the stress area at the bottom of the pipeline is increased, the bearing capacity is improved, reinforced concrete arc-shaped foundations do not need to be poured at two sides of the pipe in the construction stage, materials can be saved, the construction cost is reduced, the construction quality is improved, and the construction progress is accelerated.
Although the pipe base integrated reinforced concrete special pipe has the advantages, the pipe is buried in soil containing seawater corrosive medium or directly conveys seawater, and the defects described in the background technology still exist. The seawater corrosion resistant anticorrosive coating layer compounded with the IPN 8710-3 thick slurry type interpenetrating network anticorrosive coating has good toughness and can not be brittle failure or crack after condensation and hardening; the adhesive force to concrete is strong, and the concrete cannot fall off; the wear resistance is strong, and the paint can withstand the scouring of seawater; strong corrosion resistance and the like. After the anticorrosive paint is compounded with the inner wall and the outer wall of the pipe body integrated reinforced concrete special-shaped pipe, a protective layer is formed on the surface of the concrete, gaps and channels corroded by harmful media in seawater are blocked, media such as chloride ions, carbonic acid and the like in seawater can be effectively prevented from contacting with the surface of the pipe base integrated reinforced concrete special-shaped composite pipe, so that the pipe base integrated reinforced concrete special-shaped composite pipe or the pipe base integrated reinforced concrete special-shaped composite pipe for conveying seawater, which is buried in a sea coating, can resist the corrosion of the seawater, the destructive hidden danger of the seawater on the engineering quality of the pipe base integrated reinforced concrete special-shaped composite pipe is eliminated, and the engineering quality of the pipe base integrated reinforced concrete special-shaped composite pipe is ensured.
Drawings
FIG. 1: the embodiment of the utility model provides a half cut open the structure and show the main view
FIG. 2: section A-A of FIG. 1 without half-section
FIG. 3: the embodiment of the utility model provides a stereogram
In the figures 1-3, 1-bell mouth, 2-spigot mouth, 3-concrete circular pipe body, 4-circumferential reinforcing steel bar, 5-longitudinal steel bar, 6-concrete pipe base, 7-concrete circular pipe body inner wall, 8-concrete circular pipe body outer wall, 9-concrete pipe base outer wall, 10-anticorrosive paint layer,
FIG. 4: the embodiment of the utility model provides a half section structure schematic front view
FIG. 5: FIG. 4 is a sectional view taken along line B-B without being cut in half
FIG. 6: second embodiment of the utility model provides a perspective view
In fig. 4-6, 11-bellmouth a, 12-spigot a, 13-concrete circular pipe body a, 14-circumferential reinforcing steel bar a, 15-longitudinal reinforcing steel bar a, 16-concrete pipe base a, 17-concrete circular pipe body outer wall a, 18-concrete pipe base outer wall a, 19-anticorrosive coating layer a.
Detailed Description
The invention will now be described in further detail with reference to two examples
Example one
A seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe comprises a socket 1, a socket 2,
The pipe inner diameter is 3000MM circular body of concrete 3, hoop reinforcing bar 4, longitudinal reinforcement 5, the concrete pipe base 6 of the flat shape in bottom, the circular body inner wall 7 of concrete, the circular body outer wall 8 of concrete and the concrete pipe base outer wall 9 of the flat shape in bottom compound has the anticorrosive coating 10 of resisting the sea water corrosion. The anti-corrosion coating layer 10 is formed by compounding a double-component coating with a diluent on the inner wall 7 of the concrete circular pipe body, the outer wall 8 of the concrete circular pipe body and the outer wall 9 of the concrete pipe base with a flat bottom through mechanical spraying; the double-component coating is prepared by blending a component A and a component B according to the weight ratio of 1:1, wherein the component A is an IPN 8710-3 thick paste type interpenetrating network anticorrosive coating comprising polyurethane, modified epoxy resin, asphalt, antirust pigment and an auxiliary agent, and the component B is a curing agent.
The process and method of the specific composite seawater corrosion resistant anticorrosive coating layer 10 are as follows:
1. cleaning dirt such as oil stain, residues, dust, oxide loose layers and the like on the surface of the pipe-based integrated reinforced concrete special-shaped composite pipe, and keeping the surface in a dry state;
2. mixing an IPN 8710-3 thick paste type interpenetrating network anticorrosive coating component A and a curing agent component B according to the weight ratio of 1:1, and adding 5% of diluent;
3. connecting an air pipe by using an air compressor, spraying by using a pressurized nozzle, and performing composite spraying on the inner wall 7 of the concrete circular pipe body, the outer wall 8 of the concrete circular pipe body and the outer wall 9 of the concrete pipe base with a flat bottom for 3 times, wherein the thickness of a composite spraying wet layer reaches 200 mu m, the composite spraying interval of each layer is more than 4 hours, and the surface is dry;
4. the pipe base integrated reinforced concrete special-shaped composite pipe after composite spraying is placed in a cool and ventilated place to be dried, and the thickness of a dry layer reaches 100 mu m.
The anticorrosive coating layer 10 after composite spraying has the main performance indexes: the flexibility is less than or equal to 5mm, the surface drying is less than or equal to 6 hours, the actual drying is less than or equal to 24 hours, the appearance is flat and smooth, the adhesive force is less than or equal to 2 grade, the impact resistance is more than or equal to 40kg-cm/cm, and the non-volatile part is more than or equal to 70 percent.
The embodiment is used for being buried in beach and beach containing seawater chloride ion media and transporting seawater in pipelines.
Example two
A seawater corrosion resistant pipe-base integrated reinforced concrete special-shaped composite pipe comprises a socket A11, a spigot A12, a concrete circular pipe body A13 with the pipe inner diameter of 3000MM, an annular reinforcing steel bar A14, a longitudinal reinforcing steel bar A15 and a concrete pipe base A16 with a flat bottom, wherein an anti-corrosion coating layer A19 for seawater corrosion resistance is coated on the outer wall A17 of the concrete circular pipe body and the outer wall A18 of the concrete pipe base with the flat bottom; the anticorrosive coating layer A19 is formed by coating and compounding a double-component coating with a diluent on the outer wall A17 of the circular concrete pipe body and the outer wall A18 of the concrete pipe base with a flat bottom; the double-component coating is prepared by blending a component A and a component B according to the weight ratio of 1:1, wherein the component A is an IPN 8710-3 thick paste type interpenetrating network anticorrosive coating comprising polyurethane, modified epoxy resin, asphalt, antirust pigment and an auxiliary agent, and the component B is a curing agent.
The embodiment is used for being buried in the beach and the beach containing the seawater chloride ion medium, and rainwater is drained and transported in the pipeline.
The specific process, method and main technical indexes of the composite seawater corrosion resistant coating layer A19 are the same as those of the embodiment, and the coating is different only by manual painting instead of air compressor connection air pipes and nozzle spraying, so the description is omitted.
Claims (3)
1. A seawater-corrosion-resistant pipe-base integrated reinforced concrete special-shaped composite pipe comprises a socket, a spigot and a pipe-base integrated reinforced concrete special-shaped composite pipe,
The concrete pipe comprises a concrete pipe body, circumferential reinforcing steel bars, longitudinal reinforcing steel bars and a concrete pipe base with a flat bottom, and is characterized in that an anti-corrosion coating layer resisting seawater corrosion is compounded on the inner wall of the concrete pipe body; or the inner and outer walls of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion; or the outer wall of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion.
2. The seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe as claimed in claim 1, wherein the concrete pipe body is a concrete circular pipe body; the inner and outer walls of the round concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or mechanically sprayed with an anti-corrosion coating layer which resists seawater corrosion.
3. The seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe as claimed in claim 1, wherein the concrete pipe body is a concrete circular pipe body; the outer wall of the concrete pipe body and the outer wall of the concrete pipe base with the flat bottom are coated or sprayed with an anti-corrosion coating layer which resists seawater corrosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535008.6U CN209960024U (en) | 2019-04-19 | 2019-04-19 | Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535008.6U CN209960024U (en) | 2019-04-19 | 2019-04-19 | Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe |
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| CN209960024U true CN209960024U (en) | 2020-01-17 |
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| CN201920535008.6U Expired - Fee Related CN209960024U (en) | 2019-04-19 | 2019-04-19 | Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112756239A (en) * | 2021-01-17 | 2021-05-07 | 天华化工机械及自动化研究设计院有限公司 | Polyurethane spraying forming process for inner wall of concrete pipeline |
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2019
- 2019-04-19 CN CN201920535008.6U patent/CN209960024U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112756239A (en) * | 2021-01-17 | 2021-05-07 | 天华化工机械及自动化研究设计院有限公司 | Polyurethane spraying forming process for inner wall of concrete pipeline |
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Granted publication date: 20200117 |
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