CN115199828A - Corrosion-resistant metal hose for underground pipeline connection and construction method thereof - Google Patents

Corrosion-resistant metal hose for underground pipeline connection and construction method thereof Download PDF

Info

Publication number
CN115199828A
CN115199828A CN202210679929.6A CN202210679929A CN115199828A CN 115199828 A CN115199828 A CN 115199828A CN 202210679929 A CN202210679929 A CN 202210679929A CN 115199828 A CN115199828 A CN 115199828A
Authority
CN
China
Prior art keywords
metal hose
protective sleeve
corrosion
layer
electroplating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210679929.6A
Other languages
Chinese (zh)
Other versions
CN115199828B (en
Inventor
吴昆�
王康康
丁丁
辛茂杰
孙兴盛
刘发亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Yilian Construction Group Co ltd
Original Assignee
Qingdao Yilian Construction Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Yilian Construction Group Co ltd filed Critical Qingdao Yilian Construction Group Co ltd
Priority to CN202210679929.6A priority Critical patent/CN115199828B/en
Publication of CN115199828A publication Critical patent/CN115199828A/en
Application granted granted Critical
Publication of CN115199828B publication Critical patent/CN115199828B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F15/00—Other methods of preventing corrosion or incrustation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
    • F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/06—Accessories therefor, e.g. anchors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/026—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with interior reinforcement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/08—Coatings characterised by the materials used by metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/12—Coatings characterised by the materials used by tar or bitumen
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention discloses a corrosion-resistant metal hose for connecting underground pipelines and a construction method thereof. According to the invention, the metal hose is prepared by the corrugated pipe, the woven layer and the protective sleeve, and is applied to the municipal engineering underground pipeline interface, so that excavation is avoided, the construction of the excavation is changed into the construction of a concealed connection method, concrete maintenance is not needed, the construction period is greatly shortened, and the construction cost and the safety risk can be effectively reduced. The metal hose has good flexibility, can better meet the deformation caused by uneven settlement between different foundations and new and old pipelines, allows larger construction deviation, can adapt to the condition that the difference between the axis of the pipeline and the height difference is larger, and has the advantages of simple and easy construction, remarkable advantages and remarkable economic and social benefits.

Description

Corrosion-resistant metal hose for underground pipeline connection and construction method thereof
Technical Field
The invention relates to the technical field of metal hose corrosion prevention, in particular to a corrosion-resistant metal hose for underground pipeline connection and a construction method thereof.
Background
In the municipal engineering pipe jacking construction, the traditional method for constructing the joints between the new and old pipelines is a reinforced concrete settlement joint construction method. The traditional construction method has the advantages that excavation construction is required clearly, the construction period is long, the excavation depth is large, and normal construction is easily influenced by the restriction of the construction environment. If the adjacent pipelines and buildings around the excavation range need to adopt a reliable supporting scheme, the construction measure cost is high, the safety coefficient is low, and accidents such as foundation pit collapse, building inclination, cracks, existing pipeline slippage, damage and the like are easy to happen. Therefore, we propose a corrosion-resistant metal hose for underground pipe connection and a construction method thereof.
Disclosure of Invention
The invention aims to provide a corrosion-resistant metal hose for underground pipeline connection and a construction method thereof, and aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an underground is corrosion-resistant metal hose for pipe connection, includes bellows, suit at the weaving layer of bellows lateral wall, the protective sheath of suit at the weaving layer lateral wall, the both ends of weaving layer are provided with the pressure net ring, the joint is installed to the one end that the pressure net ring deviates from the bellows.
Furthermore, the surface of the corrugated pipe and the braided layer is provided with a metal layer which is plated with tin-nickel alloy and Ni (OH) by chemical plating 2 Replacing iron and phosphorizing.
Further, the preparation process of the metal layer comprises the following steps:
(1) Electroplating tin-nickel alloy: taking the corrugated pipe and the woven layer as a cathode and the nickel plate as an anode, and placing the corrugated pipe and the woven layer in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 10-20 min to form a tin-nickel alloy layer;
(2) Chemical plating of Ni (OH) 2 : immersing the mixed solution of glucose and sodium hydroxide into the tin-nickel alloy layer, slowly adding the nickel nitrate solution with the same volume, and reacting for 10-30 min to form Ni (OH) 2 A nanolayer;
(3) Replacing iron: mixing Ni (OH) 2 The nano layer is placed in 8-12 mol/L ferric nitrate water solution and is immersed for 50-70 min to form a ferro-nickel layer;
(4) Phosphorization: and (3) taking red phosphorus powder as a phosphorus source, and carrying out phosphorization for 60-90 min at the temperature of 420-480 ℃ in an argon atmosphere to obtain the metal layer.
Furthermore, the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 250-300 g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1-2 g/L glycine.
Further, the electroplating process comprises the following steps: the current density is 10 to 20mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 10-20 min; the pH of the electroplating solution is 8.5; the depth of the corrugated pipe and the braided layer in the electroplating solution is 5cm.
Further, the concentration of glucose in the mixed solution is 150-200 g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution is 0.01mol/L.
In the technical scheme, firstly, the surface of the corrugated pipe or the braided layer is electroplated, and a tin-nickel alloy layer is formed by deposition, contains a tin-nickel alloy phase and metal nickel, can reduce the corrosion current of the corrugated pipe or the braided layer, improves the corrosion resistance of the corrugated pipe or the braided layer, ensures the binding force between the manufactured metal layer and the corrugated pipe or the braided layer matrix, has low brittleness and good toughness, and is beneficial to the bending performance of the manufactured metal hose; and then promoting Ni (OH) 2 nucleation and crystallization in chemical plating by taking the tin-nickel alloy layer as a core, partially replacing a formed Ni (OH) 2 nano layer with iron ions to obtain an iron-nickel layer, and phosphating the iron-nickel layer in a high-temperature argon atmosphere to obtain a metal layer containing iron phosphide and nickel phosphide, so that the contact between a corrugated pipe or a braided layer substrate and a corrosive medium can be further prevented, the corrosion current is reduced, and the corrosion resistance of the corrugated pipe or the braided layer is improved.
Further, the corrugated pipe and the braided layer are one of SUS304, SUS316 and SUS316L; good flexibility, corrosion resistance, high and low temperature resistance, shock absorption, noise reduction, strong sealing property and long service life,
further, the woven layer is woven by stainless steel wires or stainless steel bands; flat woven nets and braided woven nets can be adopted;
furthermore, the inner diameter of the corrugated pipe is 8-400 mm, and the outer diameter of the corrugated pipe is 13.2-460 mm;
furthermore, the outer diameter of the corrugated pipe after the braided layer is arranged is 14.4-464.8 mm.
And a net pressing ring is also arranged and is used for connecting the corrugated pipe, the weaving layer and the joint. When welding, the corrugated pipe and the woven layer are welded together with the net pressing ring.
Set up the protective sheath at metal collapsible tube's lateral wall, can protect the weaving layer under the very high environment of wearing and tearing degree, the fluid that gushes out in can also the dispersion body under the damaged condition of metal collapsible tube reaches the safety protection effect. The protective sleeve cannot use materials containing chlorine elements, such as PVC and the like.
In applications where extreme bending of the hose connection often occurs, the connection should be reinforced; the connection may be reinforced with an Interlock sleeve or spring to protect against bending.
Further, the protective sleeve is one of an Interlock sleeve, a heat shrinkable tube and an elastomer sleeve.
Further, the protective sleeve comprises the following components in parts by weight: 80 to 90 parts of thermoplastic polyurethane elastomer 60A, 8 to 12 parts of stainless steel powder, 5 to 6 parts of carbon black, 0.2 to 0.4 part of antioxidant, 3.2 to 3.6 parts of fluorine-containing polyacrylate and 8 to 10 parts of 4,4' -diphenylmethane diisocyanate.
Further, the protective sleeve is prepared by the following process:
(1) Modification of stainless steel powder: 1.1. taking toluene, adding stainless steel powder and 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, performing ultrasonic dispersion for 8-12 min, and performing reflux reaction for 4.5-6.0 h; centrifuging at the rotating speed of 1200-1300 rpm, washing the precipitate with absolute ethyl alcohol, and drying to obtain coupled stainless steel powder;
the 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane accounts for 3.5-5.0% of the stainless steel powder by mass;
1.2. taking 2, 4-diphenylmethane diisocyanate and aniline trimer, heating to 70-90 ℃, stirring for reaction for 2-4 h, and cooling to 30-40 ℃;
adding coupled stainless steel powder, 1- (2-aminoethyl) -4-piperidinemethanol and dibutyltin dilaurate into the mixture under the protection of nitrogen atmosphere, heating to 40-70 ℃, and stirring for reacting for 3-5 hours to obtain modified stainless steel powder;
the molar ratio of the 2, 4-diphenylmethane diisocyanate, the aniline trimer, the 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, the 1- (2-aminoethyl) -4-piperidinemethanol and the dibutyltin dilaurate is (2.2-3.0): 1 (1.2-1.5): 0.7-1.2): 0.03-0.05).
(2) Preparing a protective sleeve:
mixing and extruding the thermoplastic polyurethane elastomer 70A, the fluorine-containing polyacrylate, the 4,4' -diphenylmethane diisocyanate, the stainless steel powder, the carbon black and the antioxidant, wherein the extrusion process comprises the following steps: the temperature of the screw is 160-180 ℃, the temperature of the machine head is 190 ℃, and the rotating speed of the screw is 100-250 r/min, so as to obtain the protective sleeve.
Further, the stainless steel powder is one of SUS304, SUS316 and SUS316L, and has an average particle diameter of 14 to 38 μm. The selected stainless steel powder has higher toughness and plasticity; better intergranular corrosion resistance, excellent corrosion resistance and heat resistance.
Further, the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate), and the molecular weight is 15000-25000.
Further, the antioxidant is a compound of antioxidant 1010 and antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
In the technical scheme, the filler stainless steel powder is added into the protective sleeve, and the organic components in the protective sleeve are stacked to form a multi-layer compact structure, so that the mechanical property, the peeling resistance and the corrosion resistance of the prepared protective sleeve are improved; the surface of the stainless steel powder is modified, siloxane, aniline tripolymer and piperidine are polymerized by utilizing isocyanate groups and are adsorbed and coated on the surface of the stainless steel powder to form a core-shell structure, so that the apparent activation energy of the stainless steel powder is improved, the corrosion reaction barrier is increased, and the corrosion reaction is inhibited; meanwhile, the interface performance between the stainless steel powder and the organic matrix can be improved, and the elastic toughness, the corrosion resistance and the stability of the prepared protective sleeve are improved. The fluorine-containing polyacrylate and diisocyanate are added into a polyurethane elastomer matrix together, and a cross network is formed by crosslinking, so that the molecular compactness is improved, the micro pore channel in the system is reduced, the permeation resistance is improved, and the reduction of impedance is delayed; the fluorine-containing chain segments migrate to the surface to form a micro-nano structure, so that the surface energy is reduced, and the bending resistance and the corrosion resistance of the prepared protective sleeve can be further improved.
A construction method of a corrosion-resistant metal hose for underground pipeline connection comprises the following processes:
(1) Re-measuring the axis and the elevation of the pipeline;
(2) Arranging a protective sleeve;
(3) Adjusting soil sampling at the interface;
(4) Installing a protective sleeve;
(5) Determining the diameter and the length of the metal hose;
(6) Processing a metal hose;
(7) And (5) installing and constructing the metal hose.
Further, the method comprises the following processes:
(1) Re-measuring the axis and the elevation of the pipeline; re-measuring the elevation and the axis of the pipe orifice of the jacking pipe and the joint of the pipeline to be connected;
(2) Setting a protective sleeve: confirming the length of the protective sleeve;
(3) Adjusting soil borrowing at the interface: taking earth in the opposite direction of the pipe jacking deviation, and eliminating the elevation deviation and the axis deviation of the two sections of pipelines to be connected;
(4) And (3) mounting a protective sleeve: after adjusting and taking soil at the interface, installing a protective sleeve;
(5) Determining the diameter and the length of the metal hose; determining the length of the required metal hose according to the length of the protective sleeve and the included angle of the axes of the two sections of pipelines to be connected;
(6) Processing a metal hose: the two ends of the metal hose are provided with bell-mouth-shaped connecting sections;
(7) And (3) installation and construction of the metal hose: and welding the connecting sections at the two ends of the metal hose to the inner wall of the pipeline to be connected.
Further, the method comprises the following processes:
(1) Pipeline axis and elevation retest
Stopping jacking when the jacking is about to finish after 2-3 m of the jacking pipe is remained, and re-measuring the elevation and the axis of the pipe orifice of the jacking pipe and the joint of the pipeline to be connected;
(2) Setting protective sleeve
The protective sleeve is mainly used for protecting the metal hose from being corroded by pressure (mainly soil pressure) and underground water. For construction convenience, the pipe is usually a steel pipe with a wall thickness of 1cm. According to the axial line and elevation deviation of the two sections of pipelines to be connected, the length of the metal hose can be preliminarily judged, so that the length of the protective sleeve can be determined, the protective sleeve is preferably 10-15 cm shorter than the metal hose, and the length can be determined randomly according to actual needs because the sleeve is a steel pipe. The pipe diameter of the protective sleeve is equal to or slightly smaller than that of the top pipe;
(3) Adjusting soil sampling at the interface
And adjusting soil borrowing according to the elevation and the axis deviation of the two sections of pipelines to be connected, and borrowing soil in the direction opposite to the pipe jacking deviation during soil borrowing so as to eliminate the elevation deviation and the axis deviation of the two sections of pipelines to be connected. The reverse soil borrowing can be explained as follows: when the top pipe deviates downwards, soil should be taken upwards; when the top pipe deviates to the left, the soil should be taken out to the right; and vice versa. The soil sampling amount is preferably that the elevation deviation and the axis deviation of the jacking pipe can be just eliminated;
(4) Protective sleeve installation
After the soil is taken out by adjusting the interface, the protective sleeve can be installed. When the jacking pipe is a steel pipe, the protective sleeve directly utilizes the jacking pipe per se and directly jacks a sleeve pipe with a required length; when the jacking pipe is a reinforced concrete pipe, the protective sleeve can be transported to the joint from the inside of the jacking pipe for installation (at the moment, the pipe diameter of the sleeve is slightly smaller than that of the jacking pipe). When the pipe is pushed in (installed), the distance between the sleeve and the pipe to be connected is preferably 10-15 cm. After the protective sleeve is pushed in, the sleeve is disconnected from the original pipeline at the starting position of the sleeve (the sleeve can be cut by gas welding). In order to meet the requirements of deformation and uneven settlement to the maximum extent, the sleeve pipe is also disconnected, each section is preferably about 1m, but at least not less than 2 sections, and the gap between the sleeve pipes is preferably 2-3 cm. The gap between the sleeves should be sealed by sticking rubber waterstop on the inner wall of the pipeline by glue to prevent the invasion of underground water. The bonding width of the rubber waterstop on each side of the sleeve is not smaller than 20cm, and the rubber waterstop is bonded by glue and then compacted point by using an iron hammer to bond firmly. After the strength of the adhesive reaches 100%, the next procedure is allowed to be constructed, and the sleeve is not allowed to bear any external force during the construction;
(5) Determining the diameter and length of the metal hose
The length of the metal hose can be determined according to the length of the protective sleeve and the included angle of the axes of the two sections of pipelines to be connected, and the length of the metal hose is preferably longer than the protective sleeve by more than 20 cm. The diameter of the metal hose is smaller than the inner diameter of the protective sleeve, so that the construction is convenient, and the minimum cross-section flow loss is ensured, and the diameter of the metal hose is about 20cm smaller than that of the sleeve;
(6) Metal hose processing
The wave height, wave distance and wall thickness of the metal hose are determined comprehensively according to the maximum deformation borne by the metal hose, the working pressure of the pipeline, the pipe diameter, the connection length and the like. Usually, the diameter of the metal hose is about 20cm smaller than that of the protective sleeve, and the difference can be treated by a steel bell mouth, namely, A3 steel is used for manufacturing a bell mouth-shaped connecting section with the length of 30-40 cm, and the diameter is gradually changed from the diameter of the flexible connecting section to the diameter of the protective sleeve. The outer wall of the metal hose is subjected to epoxy asphalt super-reinforced anti-corrosion treatment (a three-cloth four-oil method);
(7) Installation and construction of metal hose
After the metal hose is in place, the bell mouths at two ends are respectively welded with the inner walls of two sections of pipelines to be connected, and the reinforced concrete pipe is welded with the steel bearing mouth.
In the technical scheme, the metal hose is often used as a flexible compensation part to be installed in a liquid conveying system in industrial application, is used for compensating mutual displacement of a pipeline or a machine or equipment connecting end, absorbs vibration energy, can play roles in shock absorption, noise reduction and the like, and has multiple advantages of good flexibility, light weight, corrosion resistance, fatigue resistance, high and low temperature resistance and the like.
By taking the successful experience of the metal hose in industrial application as a reference, the metal hose is applied to the municipal engineering underground pipeline connector, so that excavation can be avoided, and the construction of excavation is changed into the construction of a concealed connection method. Concrete maintenance is not needed, and the construction period is greatly shortened; excavation and supporting are not needed, and the construction cost and the safety risk are greatly reduced. The metal hose is very good in flexibility, deformation caused by uneven settlement between different foundations and new and old pipelines can be better met, larger construction deviation is allowed for the metal hose, and connection can be successfully carried out under the condition that the difference between the axis of the pipeline and the height difference is large. The metal hose construction is simple and easy to implement, has outstanding advantages, and has remarkable economic and social benefits.
The construction of the metal hose is that the metal hose is welded on the inner wall of the pipeline, so that two sections of pipelines are connected into a whole, the construction method is a non-excavation construction method for connecting underground pipelines, an included angle between the axes of the two connected pipelines can be any angle, and the construction is very convenient.
The method is applied to pipe-jacking pipeline construction, and the construction is most convenient and feasible, economic and reasonable when the pipe diameter D is less than or equal to 1500; can be used for:
1. connecting steel pipes with the same pipe diameter;
2. connecting steel pipes with different pipe diameters;
3. connecting steel bell mouth reinforced concrete pipes with the same pipe diameter;
4. connecting steel bell mouth reinforced concrete pipes with different pipe diameters;
5. connecting steel pipes with the same pipe diameter with steel bell mouth reinforced concrete pipes;
6. the steel pipes with different pipe diameters are connected with the steel bell mouth reinforced concrete pipe.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the corrosion-resistant metal hose for underground pipeline connection and the construction method thereof, the metal hose is prepared through the corrugated pipe, the woven layer sleeved on the outer side wall of the corrugated pipe and the protective sleeve sleeved on the outer side wall of the woven layer, the metal hose is applied to an underground pipeline interface of municipal engineering by taking the successful experience of the metal hose in industrial application as reference, so that excavation is avoided, the excavation construction is changed into concealed connection construction, concrete maintenance is not needed, the construction period is greatly shortened, and the construction cost and the safety risk can be effectively reduced. The metal hose is good in flexibility, deformation caused by uneven settlement between different foundations and new and old pipelines can be better met, larger construction deviation is allowed for the metal hose, the metal hose can adapt to the condition that the difference between the axis of the pipeline and the height difference is large, the construction is simple and easy to implement, the advantages are very prominent, and the economic benefit and the social benefit are remarkable.
2. The invention relates to a corrosion-resistant metal hose for underground pipeline connection and a construction method thereof, wherein the surfaces of a corrugated pipe and a braid layer are sequentially plated with tin-nickel alloy and Ni (OH) 2 Replacement iron, bonderizing technology set up the metal level, can improve the corrosion resisting property of bellows or weaving layer, the metal level simultaneously with the bellows or weaving layer base member between cohesion, and the fragility low, toughness better, do benefit to the bending property of the metal collapsible tube who makes.
3. According to the corrosion-resistant metal hose for underground pipeline connection and the construction method thereof, the filler stainless steel powder is added into the protective sleeve, so that the mechanical property, the stripping resistance and the corrosion resistance of the prepared protective sleeve are improved, the surface of the protective sleeve is modified, siloxane, aniline trimer and piperidine are polymerized by using isocyanate groups and are adsorbed and wrapped on the surface of the stainless steel powder to form a core-shell structure, the interface property between the stainless steel powder and an organic matrix is improved, and the elastic toughness, the corrosion resistance and the stability of the prepared protective sleeve are improved; the fluorine-containing polyacrylate and diisocyanate are added into a polyurethane elastomer matrix together for crosslinking, so that the penetration resistance of the protective sleeve is improved; the fluorine-containing chain segments migrate to the surface to form a micro-nano structure, so that the surface energy is reduced, and the bending resistance and the corrosion resistance of the prepared protective sleeve can be further improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Application example:
the method is characterized in that the urban district environment improvement and promotion of the Xiugu road engineering project in the yellow island region born by Yilian group member limited company in Qingdao is realized by government investment and is a key project and an image project in Qingdao city. A water collecting well is designed at the lowest point of the tunnel to collect all rainwater of the tunnel, and the rainwater is led to a special pump station for the tunnel through a DN1000 steel rainwater pipeline, so that the problem of rainwater discharge of the tunnel is solved. The pump station water inlet pipe is constructed by DN1000 steel jacking pipes, the underground passage rain pipe is a DN1000 steel pipe, the included angle between the axes of the two pipes is 141 degrees, and the pump station water inlet pipe is designed to be used for connecting the two pipes by a steel reinforced concrete settlement joint.
The original design settlement joint is cancelled by changing the project department, and the construction is changed into a 141-degree metal hose concealed connection method, so that the construction cost is reduced by 15.6 ten thousand yuan, the construction period is shortened by 53 days, and better economic benefit and social benefit are obtained.
Example 1
1. Sleeving a woven layer on the outer side wall of the corrugated pipe in a sleeving manner, sleeving a protective sleeve on the outer side wall of the woven layer in a sleeving manner, arranging net pressing rings at two ends of the woven layer, and installing a joint at one end of each net pressing ring, which is far away from the corrugated pipe, so as to obtain a metal hose; the corrugated pipe and the woven layer are SUS304; the inner diameter of the corrugated pipe is set to be 100mm, and the outer diameter of the corrugated pipe is 119.6mm; the outer diameter of the corrugated pipe after the woven layer is arranged is 121.2mm; the thickness of the protective sleeve is set to be 0.56mm;
2. the surfaces of the corrugated pipe and the woven layer are provided with metal layers, and the preparation process comprises the following steps:
(1) Electroplating tin-nickel alloy: taking the corrugated pipe and the woven layer as a cathode and the nickel plate as an anode, and placing the corrugated pipe and the woven layer in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 10min to form a tin-nickel alloy layer;
the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 250g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1g/L glycine;
the electroplating process comprises the following steps: current density 10mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 10min; the pH of the electroplating solution is 8.5; the depth of the corrugated pipe and the woven layer in the electroplating solution is 5cm;
(2) Chemical plating of Ni (OH) 2 : immersing the tin-nickel alloy layer in the mixed solution of glucose and sodium hydroxide, slowly adding the nickel nitrate solution with the same volume, and reacting for 10min to form Ni (OH) 2 A nanolayer;
the concentration of glucose in the mixed solution is 150g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution is 0.01mol/L;
(3) Replacing iron: mixing Ni (OH) 2 The nano layer is placed in 8mol/L ferric nitrate water solution and is immersed for 50min to form a ferro-nickel layer;
(4) Phosphorization: taking red phosphorus powder as a phosphorus source, and carrying out phosphorization for 60min at the temperature of 420 ℃ in an argon atmosphere to obtain a metal layer;
3. the preparation process of the protective sleeve comprises the following steps:
(1) Modification of stainless steel powder:
1.1. taking toluene, adding stainless steel powder and 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, ultrasonically dispersing for 8min, and carrying out reflux reaction for 4.5h; centrifuging at the rotating speed of 1200rpm, washing the precipitate with absolute ethyl alcohol, and drying to obtain coupled stainless steel powder;
3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane accounts for 3.5% of the stainless steel powder by mass;
1.2. taking 2, 4-diphenylmethane diisocyanate and aniline trimer, heating to 70 ℃, stirring for reacting for 2h, and cooling to 30 ℃;
under the protection of nitrogen atmosphere, adding coupled stainless steel powder, 1- (2-aminoethyl) -4-piperidinemethanol and dibutyltin dilaurate, heating to 40 ℃, and stirring for reacting for 3 hours to obtain modified stainless steel powder;
the molar ratio of 2,4-diphenylmethane diisocyanate, aniline trimer, 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, 1- (2-aminoethyl) -4-piperidinemethanol, dibutyltin dilaurate was 2.2.
(2) Preparing a protective sleeve:
mixing and extruding 80 parts of thermoplastic polyurethane elastomer 60A, 8 parts of stainless steel powder, 5 parts of carbon black, 0.2 part of antioxidant, 3.2 parts of fluorine-containing polyacrylate and 8 parts of 4,4' -diphenylmethane diisocyanate, wherein the extrusion process comprises the following steps: the screw temperature is 160 ℃, the head temperature is 190 ℃, and the screw rotating speed is 100r/min, so that the protective sleeve is obtained.
The stainless steel powder is SUS304, and the average grain diameter is 14 μm; the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate) with the molecular weight of 15000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
Example 2
1. Sleeving a woven layer on the outer side wall of the corrugated pipe in a sleeving manner, sleeving a protective sleeve on the outer side wall of the woven layer in a sleeving manner, arranging net pressing rings at two ends of the woven layer, and installing a joint at one end of each net pressing ring, which is far away from the corrugated pipe, so as to obtain a metal hose; the corrugated pipe and the braided layer are SUS316; the inner diameter of the corrugated pipe is set to be 100mm, and the outer diameter of the corrugated pipe is 119.6mm; the outer diameter of the corrugated pipe after the braided layer is arranged is 121.2mm; the thickness of the protective sleeve is set to be 0.56mm;
2. the surfaces of the corrugated pipe and the woven layer are provided with metal layers, and the preparation process comprises the following steps:
(1) Electroplating tin-nickel alloy: taking the corrugated pipe and the woven layer as a cathode and the nickel plate as an anode, and placing the corrugated pipe and the woven layer in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 15min to form a tin-nickel alloy layer;
the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 275g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1.5g/L glycine;
the electroplating process comprises the following steps: current density 15mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 15min; the pH of the electroplating solution is 8.5; the depth of the corrugated pipe and the braided layer in the electroplating solution is 5cm;
(2) Chemical plating of Ni (OH) 2 : immersing the tin-nickel alloy layer in the mixed solution of glucose and sodium hydroxide, slowly adding the nickel nitrate solution with the same volume, and reacting for 20min to form Ni (OH) 2 A nanolayer;
the concentration of glucose in the mixed solution is 175g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution is 0.01mol/L;
(3) Replacing iron: mixing Ni (OH) 2 The nano layer is placed in 10mol/L ferric nitrate water solution and immersed for 60min to form a nickel-iron layer;
(4) Phosphorization: taking red phosphorus powder as a phosphorus source, and carrying out phosphating for 75min at the temperature of 450 ℃ in an argon atmosphere to obtain a metal layer;
3. the preparation process of the protective sleeve comprises the following steps:
(1) Modification of stainless steel powder: 1.1. taking toluene, adding stainless steel powder and 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, performing ultrasonic dispersion for 10min, and performing reflux reaction for 5.2h; centrifuging at the rotating speed of 1250rpm, washing the precipitate with absolute ethyl alcohol, and drying to obtain coupled stainless steel powder;
the mass of the 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane accounts for 4.2 percent of that of the stainless steel powder;
1.2. taking 2, 4-diphenylmethane diisocyanate and aniline trimer, heating to 80 ℃, stirring for reacting for 3 hours, and cooling to 35 ℃;
adding coupling stainless steel powder, 1- (2-aminoethyl) -4-piperidinemethanol and dibutyltin dilaurate into the mixture under the protection of nitrogen atmosphere, heating to 55 ℃, and stirring for reacting for 4 hours to obtain modified stainless steel powder;
the molar ratio of 2, 4-diphenylmethane diisocyanate, aniline trimer, 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, 1- (2-aminoethyl) -4-piperidinemethanol, dibutyltin dilaurate was 2.6.
(2) Preparing a protective sleeve:
taking 85 parts of thermoplastic polyurethane elastomer 60A, 10 parts of stainless steel powder, 5.5 parts of carbon black, 0.3 part of antioxidant, 3.4 parts of fluorine-containing polyacrylate and 9 parts of 4,4' -diphenylmethane diisocyanate, mixing, extruding and extruding, wherein the extrusion process comprises the following steps: the screw temperature is 170 ℃, the head temperature is 190 ℃, and the screw rotation speed is 180r/min, so that the protective sleeve is obtained.
The stainless steel powder is SUS316, and has an average particle diameter of 26 μm; the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate) with the molecular weight of 20000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
Example 3
1. Sleeving a woven layer on the outer side wall of the corrugated pipe in a sleeving manner, sleeving a protective sleeve on the outer side wall of the woven layer in a sleeving manner, arranging net pressing rings at two ends of the woven layer, and installing a joint at one end of each net pressing ring, which is far away from the corrugated pipe, so as to obtain a metal hose; the corrugated pipe and the braided layer are SUS316L; the inner diameter of the corrugated pipe is set to be 100mm, and the outer diameter of the corrugated pipe is 119.6mm; the outer diameter of the corrugated pipe after the braided layer is arranged is 121.2mm; the thickness of the protective sleeve is set to be 0.56mm;
2. the surfaces of the corrugated pipe and the woven layer are provided with metal layers, and the preparation process comprises the following steps:
(1) Electroplating tin-nickel alloy: taking the corrugated pipe and the woven layer as a cathode and the nickel plate as an anode, and placing the corrugated pipe and the woven layer in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 20min to form a tin-nickel alloy layer;
the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 300g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 2g/L glycine;
the electroplating process comprises the following steps: current density 20mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 20min; the pH value of the electroplating solution is 8.5; the depth of the corrugated pipe and the woven layer in the electroplating solution is 5cm;
(2) Chemical plating of Ni (OH) 2 : soaking the tin-nickel alloy layer in the mixed solution of glucose and sodium hydroxide, slowly adding nickel nitrate solution of the same volume, and reacting for 30min to form Ni (OH) 2 A nanolayer;
the concentration of glucose in the mixed solution is 200g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution is 0.01mol/L;
(3) Replacing iron: mixing Ni (OH) 2 The nano layer is placed in 12mol/L ferric nitrate water solution and is immersed for 70min to form a ferro-nickel layer;
(4) Phosphorization: phosphorizing red phosphorus powder serving as a phosphorus source at 480 ℃ for 90min in an argon atmosphere to obtain a metal layer;
3. the preparation process of the protective sleeve comprises the following steps:
(1) Modification of stainless steel powder: 1.1. taking toluene, adding stainless steel powder and 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, ultrasonically dispersing for 12min, and carrying out reflux reaction for 6.0h; centrifuging at the rotating speed of 1300rpm, washing the precipitate with absolute ethyl alcohol, and drying to obtain coupled stainless steel powder;
the mass of the 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane accounts for 5.0 percent of that of the stainless steel powder;
1.2. taking 2, 4-diphenylmethane diisocyanate and aniline trimer, heating to 90 ℃, stirring for reacting for 4 hours, and cooling to 40 ℃;
under the protection of nitrogen atmosphere, adding coupled stainless steel powder, 1- (2-aminoethyl) -4-piperidinemethanol and dibutyltin dilaurate, heating to 70 ℃, and stirring for reacting for 5 hours to obtain modified stainless steel powder;
the molar ratio of 2, 4-diphenylmethane diisocyanate, aniline trimer, 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, 1- (2-aminoethyl) -4-piperidinemethanol, dibutyltin dilaurate was 3.0.
(2) Preparing a protective sleeve:
taking 90 parts of thermoplastic polyurethane elastomer 60A, 12 parts of stainless steel powder, 6 parts of carbon black, 0.4 part of antioxidant, 3.6 parts of fluorine-containing polyacrylate and 10 parts of 4,4' -diphenylmethane diisocyanate, mixing, extruding and adopting the following extrusion process: the screw temperature is 180 ℃, the head temperature is 190 ℃, and the screw rotating speed is 250r/min, so that the protective sleeve is obtained.
The stainless steel powder is SUS316L, and the average grain diameter is 38 μm; the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate), and the molecular weight is 25000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
Comparative example 1
The preparation process of the metal layer comprises the following steps:
(1) Electroplating tin-nickel alloy: taking SUS304 as a cathode and a nickel plate as an anode, and placing the cathode in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 10min to form a tin-nickel alloy layer;
the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 250g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1g/L glycine;
the electroplating process comprises the following steps: current density 10mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 10min; the pH of the electroplating solution is 8.5; the depth of the corrugated pipe and the woven layer in the electroplating solution is 5cm;
phosphorization: and (3) taking red phosphorus powder as a phosphorus source, and carrying out phosphorization for 60min at the temperature of 420 ℃ in an argon atmosphere to obtain the metal layer.
The first and third processes were the same as in example 1 to obtain a metal hose.
Comparative example 2
The preparation process of the metal layer comprises the following steps:
(1) Electroplating tin-nickel alloy: taking SUS304 as a cathode and a nickel plate as an anode, and placing the cathode in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 10min to form a tin-nickel alloy layer;
the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 250g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1g/L glycine;
the electroplating process comprises the following steps: current density 10mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 10min; the pH of the electroplating solution is 8.5; the depth of the corrugated pipe and the woven layer in the electroplating solution is 5cm;
(2) Chemical plating of Ni (OH) 2 : immersing the tin-nickel alloy layer in the mixed solution of glucose and sodium hydroxide, slowly adding the nickel nitrate solution with the same volume, and reacting for 10min to form Ni (OH) 2 A nanolayer;
the concentration of glucose in the mixed solution is 150g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution is 0.01mol/L;
(3) Phosphorization: and (3) taking red phosphorus powder as a phosphorus source, and carrying out phosphorization for 60min at the temperature of 420 ℃ in an argon atmosphere to obtain the metal layer.
The first and third processes were the same as in example 1 to obtain a metal hose.
Comparative example 3
The preparation process of the metal layer comprises the following steps:
(1) Electroplating tin-nickel alloy: taking SUS304 as a cathode and a nickel plate as an anode, and placing the cathode in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 10min to form a tin-nickel alloy layer;
the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 250g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1g/L glycine;
the electroplating process comprises the following steps: current density 10mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 10min; the pH value of the electroplating solution is 8.5; the depth of the corrugated pipe and the woven layer in the electroplating solution is 5cm;
(2) Chemical plating of Ni (OH) 2 : soaking the tin-nickel alloy layer in the mixed solution of glucose and sodium hydroxide, slowly adding nickel nitrate solution of the same volume, and reacting for 10min to form Ni (OH) 2 A nanolayer; carrying out heat treatment for 60min at the temperature of 420 ℃ in the argon atmosphere to obtain a metal layer;
the concentration of glucose in the mixed solution is 150g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution was 0.01mol/L.
The first and third processes were the same as in example 1 to obtain a metal hose.
Comparative example 4
The surface of SUS304 is not provided with a metal layer;
the first and third processes were the same as in example 1 to obtain a metal hose.
Comparative example 5
The preparation process of the protective sleeve comprises the following steps:
(1) Modification of stainless steel powder:
1.1. taking toluene, adding stainless steel powder and 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, ultrasonically dispersing for 8min, and carrying out reflux reaction for 4.5h; centrifuging at the rotating speed of 1200rpm, washing the precipitate with absolute ethyl alcohol, and drying to obtain coupled stainless steel powder;
3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane accounts for 3.5% of the stainless steel powder by mass;
(2) Preparing a protective sleeve:
mixing and extruding 80 parts of thermoplastic polyurethane elastomer 60A, 8 parts of stainless steel powder, 5 parts of carbon black, 0.2 part of antioxidant, 3.2 parts of fluorine-containing polyacrylate and 8 parts of 4,4' -diphenylmethane diisocyanate, wherein the extrusion process comprises the following steps: the screw temperature is 160 ℃, the head temperature is 190 ℃, and the screw rotating speed is 100r/min, so that the protective sleeve is obtained.
The stainless steel powder is SUS304, and the average particle size is 14 μm; the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate) with the molecular weight of 15000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
The first and second processes are the same as the comparative example 4, and the metal hose is obtained.
Comparative example 6
The preparation technology of the protective sleeve comprises the following steps:
(1) Modification of stainless steel powder:
1.1. taking 2, 4-diphenylmethane diisocyanate and aniline trimer, heating to 70 ℃, stirring for reacting for 2 hours, and cooling to 30 ℃;
under the protection of nitrogen atmosphere, adding stainless steel powder, 1- (2-aminoethyl) -4-piperidinemethanol and dibutyltin dilaurate, heating to 40 ℃, and stirring for reacting for 3 hours to obtain modified stainless steel powder;
the molar ratio of 2,4-diphenylmethane diisocyanate, aniline trimer, 1- (2-aminoethyl) -4-piperidinemethanol, dibutyltin dilaurate was 2.2.
(2) Preparing a protective sleeve:
taking 80 parts of thermoplastic polyurethane elastomer 60A, 8 parts of stainless steel powder, 5 parts of carbon black, 0.2 part of antioxidant, 3.2 parts of fluorine-containing polyacrylate and 8 parts of 4,4' -diphenylmethane diisocyanate, mixing, extruding and adopting the following extrusion process: the screw temperature is 160 ℃, the head temperature is 190 ℃, and the screw rotating speed is 100r/min, so that the protective sleeve is obtained.
The stainless steel powder is SUS304, and the average particle size is 14 μm; the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate) with the molecular weight of 15000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
The first and second processes are the same as the comparative example 4, and the metal hose is obtained.
Comparative example 7
The preparation technology of the protective sleeve comprises the following steps:
taking 80 parts of thermoplastic polyurethane elastomer 60A, 8 parts of stainless steel powder, 5 parts of carbon black, 0.2 part of antioxidant, 3.2 parts of fluorine-containing polyacrylate and 8 parts of 4,4' -diphenylmethane diisocyanate, mixing, extruding and adopting the following extrusion process: the screw temperature is 160 ℃, the head temperature is 190 ℃, and the screw rotating speed is 100r/min, so that the protective sleeve is obtained.
The stainless steel powder is SUS304, and the average particle size is 14 μm; the fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate) with the molecular weight of 15000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
The first and second processes are the same as the comparative example 4, and the metal hose is obtained.
Comparative example 8
The preparation process of the protective sleeve comprises the following steps:
mixing and extruding 80 parts of thermoplastic polyurethane elastomer 60A, 15 parts of carbon black, 0.2 part of antioxidant, 3.2 parts of fluorine-containing polyacrylate and 8 parts of 4,4' -diphenylmethane diisocyanate, wherein the extrusion process comprises the following steps: the screw temperature is 160 ℃, the head temperature is 190 ℃, and the screw rotating speed is 100r/min, so that the protective sleeve is obtained.
The fluorine-containing polyacrylate is mercaptoethanol-terminated poly (2, 2-trifluoroethyl acrylate) with the molecular weight of 15000; the antioxidant is a compound of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
The first and second processes are the same as the comparative example 4, and the metal hose is obtained.
Experiment of
The metal hoses obtained in examples 1 to 3 and comparative examples 1 to 8 were used to prepare samples, and the performance of the samples was measured and the measurement results were recorded:
metal layer salt spray test: taking a steel strip and a surface metal layer thereof as samples, wherein the thickness of the sample is 2.5 mu m, and the size of the sample is 50cm multiplied by 50cm; testing a sample by using a salt spray corrosion test box and an air compressor by using GB 6458-2002 as a test standard; the test parameters are as follows: 50g/L sodium chloride solution with pH of 7.0, test temperature of 35 deg.C, and salt spray sedimentation rate of 1.5ml/80cm 2 ·h。
Salt spray test of the protective sleeve: taking the steel strip and the protective sleeve coated on the surface of the steel strip as a sample, and carrying out a salt spray test by taking GB/T12000-2017 as a test standard;
after 16h of the salt spray test, the steel strip is graded by taking GB 6461-2002 as a grading standard.
Figure BDA0003695933190000161
Figure BDA0003695933190000171
From the data in the table above, it is clear that the following conclusions can be drawn:
when the metal hoses obtained in examples 1 to 3 were compared with the metal hoses obtained in comparative examples 1 to 8, it was found that,
compared with the comparative example 8, the metal hose obtained in the examples 1 to 3 has more excellent appearance of the metal layer and the protective sleeve after the salt spray test, and the metal layer and the protective sleeve have more excellent corrosion resistance, so that the manufactured metal hose has higher maximum working pressure, and the static minimum bending radius of the metal hose is not obviously degraded, which fully shows that the corrosion resistance of the manufactured metal hose is improved;
compared with example 1, the metal hose obtained in comparative examples 1 to 4 has a metal layer that is prepared by a different process; compared with comparative example 4, the preparation process of the protective sleeve of the metal hose obtained in comparative examples 5 to 8 is changed; after the salt spray test, the steel strip is more corroded, the corrosion resistance is deteriorated, and the static minimum bending radius and the highest working pressure of the manufactured metal hose are different; therefore, the metal layer, the protective sleeve component and the preparation process thereof are arranged, so that the bending performance and the pressure resistance can be ensured, and the corrosion resistance of the manufactured metal hose can be improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process item or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process item or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an underground is corrosion-resistant metal collapsible tube for pipe connection which characterized in that: the corrugated pipe comprises a corrugated pipe, a woven layer sleeved on the outer side wall of the corrugated pipe and a protective sleeve sleeved on the outer side wall of the woven layer, wherein net pressing rings are arranged at two ends of the woven layer, and a joint is installed at one end, deviating from the corrugated pipe, of each net pressing ring.
2. The corrosion-resistant metal hose for underground piping according to claim 1, wherein: the corrugated pipe and the woven layer are provided with metal layers on the surfaces, and the metal layers are formed by electroplating tin-nickel alloy and chemically plating Ni (OH) 2 Replacing iron and phosphorizing.
3. The corrosion-resistant metal hose for underground piping connection according to claim 2, wherein: the preparation process of the metal layer comprises the following steps:
(1) Electroplating tin-nickel alloy: taking the corrugated pipe and the woven layer as a cathode and the nickel plate as an anode, and placing the corrugated pipe and the woven layer in electroplating solution containing stannous chloride and stannic sulfate for electroplating for 10-20 min to form a tin-nickel alloy layer;
(2) Chemical plating of Ni (OH) 2 : immersing the mixed solution of glucose and sodium hydroxide into the tin-nickel alloy layer, slowly adding the nickel nitrate solution with the same volume, and reacting for 10-30 min to form Ni (OH) 2 A nanolayer;
(3) Replacing iron: mixing Ni (OH) 2 The nano layer is placed in 8-12 mol/L ferric nitrate water solution and is immersed for 50-70 min to form a nickel-iron layer;
(4) Phosphorization: and (3) taking red phosphorus powder as a phosphorus source, and carrying out phosphorization for 60-90 min at the temperature of 420-480 ℃ in an argon atmosphere to obtain the metal layer.
4. The corrosion-resistant metal hose for underground piping connection of claim 3, wherein: the electroplating solution contains 35g/L stannous chloride, 45g/L stannic sulfate, 250-300 g/L potassium pyrophosphate, 1.0g/L sodium dodecyl sulfate, 1.5g/L hydroquinone, 0.5g/L saccharin and 1-2 g/L glycine.
5. The corrosion-resistant metal hose for underground piping according to claim 3, wherein: the electroplating is carried outThe process comprises the following steps: the current density is 10 to 20mA/cm 2 Electroplating temperature is 45 ℃, and electroplating time is 10-20 min; the pH of the electroplating solution is 8.5; the depth of the corrugated pipe and the braided layer in the electroplating solution is 5cm.
6. The corrosion-resistant metal hose for underground piping according to claim 3, wherein: the concentration of glucose in the mixed solution is 150-200 g/L, and the concentration of sodium hydroxide is 10g/L; the concentration of the nickel nitrate solution is 0.01mol/L.
7. The corrosion-resistant metal hose for underground piping connection of claim 1, wherein: the protective sleeve is one of an Interlock sleeve, a heat-shrinkable tube and an elastomer sleeve.
8. The corrosion-resistant metal hose for underground piping according to claim 7, wherein: the protective sleeve comprises the following components in parts by weight: 80-90 parts of thermoplastic polyurethane elastomer 60A, 8-12 parts of modified stainless steel powder, 5-6 parts of carbon black, 0.2-0.4 part of antioxidant, 3.2-3.6 parts of fluorine-containing polyacrylate and 8-10 parts of 4,4' -diphenylmethane diisocyanate.
9. The corrosion-resistant metal hose for underground piping according to claim 8, wherein: the protective sleeve is prepared by the following process:
(1) Modification of stainless steel powder:
1.1. taking toluene, adding stainless steel powder and 3- [ bis (2-hydroxyethyl) amino ] propane-triethoxysilane, performing ultrasonic dispersion for 8-12 min, and performing reflux reaction for 4.5-6.0 h; centrifuging at the rotating speed of 1200-1300 rpm, taking the precipitate, washing with absolute ethyl alcohol, and drying to obtain coupled stainless steel powder;
1.2. taking 2, 4-diphenylmethane diisocyanate and aniline trimer, heating to 70-90 ℃, stirring for reaction for 2-4 h, and cooling to 30-40 ℃;
adding coupled stainless steel powder, 1- (2-aminoethyl) -4-piperidinemethanol and dibutyltin dilaurate into the mixture under the protection of nitrogen atmosphere, heating to 40-70 ℃, and stirring for reacting for 3-5 hours to obtain modified stainless steel powder;
(2) Preparing a protective sleeve:
mixing and extruding the thermoplastic polyurethane elastomer 70A, the fluorine-containing polyacrylate, the 4,4' -diphenylmethane diisocyanate, the stainless steel powder, the carbon black and the antioxidant, wherein the extrusion process comprises the following steps: the temperature of the screw is 160-180 ℃, the temperature of the machine head is 190 ℃, and the rotating speed of the screw is 100-250 r/min, so as to obtain the protective sleeve.
10. A construction method of a corrosion-resistant metal hose for underground pipeline connection is characterized by comprising the following steps: the method comprises the following processes:
(1) Re-measuring the axis and the elevation of the pipeline; re-measuring the elevation and the axis of the pipe orifice of the jacking pipe and the joint of the to-be-connected pipeline;
(2) Setting a protective sleeve: confirming the length of the protective sleeve;
(3) Adjusting soil borrowing at the interface: taking earth in the opposite direction of the pipe jacking deviation, and eliminating the elevation deviation and the axis deviation of the two sections of pipelines to be connected;
(4) And (3) mounting a protective sleeve: after adjusting and taking soil at the interface, installing a protective sleeve;
(5) Determining the diameter and the length of the metal hose; determining the length of the required metal hose according to the length of the protective sleeve and the included angle of the axes of the two sections of pipelines to be connected;
(6) Processing a metal hose: connecting sections in the shape of a horn mouth are arranged at two ends of the metal hose;
(7) And (3) installation and construction of the metal hose: and welding the connecting sections at the two ends of the metal hose to the inner wall of the pipeline to be connected.
CN202210679929.6A 2022-06-15 2022-06-15 Corrosion-resistant metal hose for underground pipeline connection and construction method thereof Active CN115199828B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210679929.6A CN115199828B (en) 2022-06-15 2022-06-15 Corrosion-resistant metal hose for underground pipeline connection and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210679929.6A CN115199828B (en) 2022-06-15 2022-06-15 Corrosion-resistant metal hose for underground pipeline connection and construction method thereof

Publications (2)

Publication Number Publication Date
CN115199828A true CN115199828A (en) 2022-10-18
CN115199828B CN115199828B (en) 2023-08-08

Family

ID=83575363

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210679929.6A Active CN115199828B (en) 2022-06-15 2022-06-15 Corrosion-resistant metal hose for underground pipeline connection and construction method thereof

Country Status (1)

Country Link
CN (1) CN115199828B (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1085265A (en) * 1992-09-29 1994-04-13 中科院金属腐蚀与防护研究所 A kind of corrugated tube that is used for expansion joint and metallic hose
CA2303472A1 (en) * 2000-03-29 2001-09-29 Terry L. Jackson Flexible and safe tubing and hoses for connecting indoor and outdoor gaseous fuels (such as natural gas (ng) and lpg) for domestic and industrial applications
CN201193745Y (en) * 2008-05-12 2009-02-11 天津市塘沽中信软管工业有限公司 Solderless metal contact sealing stainless steel metal hose
CN203010048U (en) * 2012-11-16 2013-06-19 梁宝忠 Coated type metallic corrugated pipe
CN103484870A (en) * 2013-09-17 2014-01-01 国家电网公司 Surface treatment method for improving corrosion resistance of grounding wires
CN103993725A (en) * 2014-03-19 2014-08-20 潘兴科 Residential gas and water pipeline supply technology and construction method thereof
CN205938240U (en) * 2016-07-17 2017-02-08 河北德冠橡塑制品有限公司 Withstand voltage metal collapsible tube of stainless steel
CN206595064U (en) * 2017-02-11 2017-10-27 江西瑞金金字电线电缆有限公司 A kind of high anti-corrosion wave prevention sleeve of high temperature resistant
CN209948171U (en) * 2019-07-29 2020-01-14 福州德亿电子科技有限公司 Antenna waterproof interface with easy construction and high protection level
CN112626552A (en) * 2021-01-07 2021-04-09 兰州大学 Method for electrodepositing Ni-Fe-Sn-P alloy on surface of foamed nickel
CN214947054U (en) * 2021-02-03 2021-11-30 河北万宇波纹管科技有限公司 Scald-proof wear-resistant metal hose
US20220136623A1 (en) * 2020-09-07 2022-05-05 Lanzhou Tianyi Petrochemical Equipment Maintenance Technology Co. Ltd Explosion-proof flexible metal hose for natural gas pipelines

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1085265A (en) * 1992-09-29 1994-04-13 中科院金属腐蚀与防护研究所 A kind of corrugated tube that is used for expansion joint and metallic hose
CA2303472A1 (en) * 2000-03-29 2001-09-29 Terry L. Jackson Flexible and safe tubing and hoses for connecting indoor and outdoor gaseous fuels (such as natural gas (ng) and lpg) for domestic and industrial applications
CN201193745Y (en) * 2008-05-12 2009-02-11 天津市塘沽中信软管工业有限公司 Solderless metal contact sealing stainless steel metal hose
CN203010048U (en) * 2012-11-16 2013-06-19 梁宝忠 Coated type metallic corrugated pipe
CN103484870A (en) * 2013-09-17 2014-01-01 国家电网公司 Surface treatment method for improving corrosion resistance of grounding wires
CN103993725A (en) * 2014-03-19 2014-08-20 潘兴科 Residential gas and water pipeline supply technology and construction method thereof
CN205938240U (en) * 2016-07-17 2017-02-08 河北德冠橡塑制品有限公司 Withstand voltage metal collapsible tube of stainless steel
CN206595064U (en) * 2017-02-11 2017-10-27 江西瑞金金字电线电缆有限公司 A kind of high anti-corrosion wave prevention sleeve of high temperature resistant
CN209948171U (en) * 2019-07-29 2020-01-14 福州德亿电子科技有限公司 Antenna waterproof interface with easy construction and high protection level
US20220136623A1 (en) * 2020-09-07 2022-05-05 Lanzhou Tianyi Petrochemical Equipment Maintenance Technology Co. Ltd Explosion-proof flexible metal hose for natural gas pipelines
CN112626552A (en) * 2021-01-07 2021-04-09 兰州大学 Method for electrodepositing Ni-Fe-Sn-P alloy on surface of foamed nickel
CN214947054U (en) * 2021-02-03 2021-11-30 河北万宇波纹管科技有限公司 Scald-proof wear-resistant metal hose

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
宋红伟等: "城市管廊自来水管道用补偿装置技术标准初探", 《城市管廊自来水管道用补偿装置技术标准初探》, pages 21 - 24 *

Also Published As

Publication number Publication date
CN115199828B (en) 2023-08-08

Similar Documents

Publication Publication Date Title
CN111520570B (en) Pipeline pressure leaking stoppage repairing and double-layer long-acting anti-corrosion device and construction method thereof
CN111878665A (en) Method for preventing corrosion of submarine pipeline
CN207406936U (en) A kind of high molecular steel wire mesh frame polyethylene compound pipe
CN211735820U (en) Cement product lining plastic multi-point anchoring structure
CN203384514U (en) High-pressure flexible rubber hose
CN115199828A (en) Corrosion-resistant metal hose for underground pipeline connection and construction method thereof
CN103398241B (en) A kind of high-pressure flexible rubber hose and connector connecting method thereof
CN111058673A (en) Transmission tower is with angle steel of nai time
CN202708352U (en) PE160-rank fiber-reinforced polyethylene tube stock
CN2317377Y (en) Composite corrosion-resisting industrial pipeline
CN212389942U (en) Device for pressure leaking stoppage repair and long-term corrosion prevention of compound layer of outlet pipeline
CN114688383A (en) Anticorrosion repairing method for temperature-resistant pressure-resistant composite pipe of liner of oil-gas-water mixed transportation pipeline
CN112555523A (en) High-strength anti-corrosion infusion pipeline with adjustable anti-permeability function and manufacturing method thereof
CN217319649U (en) High-toughness power tube
CN111503370A (en) Reinforced concrete top pipe joint
CN220118823U (en) Pipeline passes a perforation integration fixed bolster
CN219432786U (en) Water supply pipe with strong weather resistance
CN217762447U (en) Petroleum pipeline with high weather resistance and good compression resistance effect
CN112049991A (en) High-pressure plastic pipeline and preparation method thereof
CN216689377U (en) Long-acting protective structure of fishery breeding platform steel-pipe pile
CN211851158U (en) Transmission tower is with angle steel of nai time
CN206018048U (en) The embed-type Prestressed concrete cylinder pipe of long life anti corrosion
CN107989156B (en) Structure for PCCP pipe faucet seam, pipeline and construction method
CN221034383U (en) Replacement pipe joint for PCCP (prestressed concrete cylinder pipe) quick replacement
CN216382909U (en) Impervious concrete pipeline

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant