CN114542572B - Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof - Google Patents

Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof Download PDF

Info

Publication number
CN114542572B
CN114542572B CN202210201236.6A CN202210201236A CN114542572B CN 114542572 B CN114542572 B CN 114542572B CN 202210201236 A CN202210201236 A CN 202210201236A CN 114542572 B CN114542572 B CN 114542572B
Authority
CN
China
Prior art keywords
weight
corrosion
air bag
parts
sewage discharge
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.)
Active
Application number
CN202210201236.6A
Other languages
Chinese (zh)
Other versions
CN114542572A (en
Inventor
孙浩儿
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.)
Ningbo Haobo Commerce Co ltd
Original Assignee
Ningbo Haobo Commerce 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 Ningbo Haobo Commerce Co ltd filed Critical Ningbo Haobo Commerce Co ltd
Priority to CN202210201236.6A priority Critical patent/CN114542572B/en
Publication of CN114542572A publication Critical patent/CN114542572A/en
Application granted granted Critical
Publication of CN114542572B publication Critical patent/CN114542572B/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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/04—Electrophoretic coating characterised by the process with organic material
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The application discloses an anti-corrosion segment bolt for a sewage discharge shield tunnel and a preparation method thereof, and relates to the technical field of anti-corrosion bolts. According to the application, the waterproof gasket and the bolt body are matched to achieve the waterproof effect, and the bolt body is prepared by adopting components with corresponding mass percentages, so that the anti-corrosion pipe piece bolt for the sewage discharge shield tunnel has an effective anti-corrosion effect.

Description

Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof
Technical Field
The application relates to the technical field of anti-corrosion bolts, in particular to an anti-corrosion segment bolt for a sewage discharge shield tunnel and a preparation method thereof.
Background
With the rapid development of economy, urban rail transit follows the pace, not only is travel, work and life of urban residents directly related, but also the characteristics of low pollution and low energy consumption promote the image of urban modernization, so that the urban rail transit is called as green life traffic. In the current tunnel construction method, the shield method is widely applied to various large cities by virtue of the advantages of high construction quality, full mechanization and the like.
In the prior art, in order to enable the bolts to meet the waterproof requirement in the tunnel, water-swelling rubber washers are generally adopted to waterproof the bolt holes. Therefore, the elastic washer is used for replacing the traditional steel washer for assembling the joint bolt, so that the rigidity of the joint can be reduced to avoid the damage of the bolt, and the waterproof structure is effectively provided.
However, when the waterproof rubber gasket is used for realizing stable installation and long-term waterproof of the bolt, the waterproof rubber gasket is eccentric due to the defect of uniformity of stress, so that the waterproof performance is reduced and the problem of water leakage at the bolt hole is caused, the use safety and the service life of the tunnel are seriously affected, the life and property safety of people are endangered, and the improvement is needed.
Disclosure of Invention
In view of the shortcomings of the prior art, a first object of the present application is to provide an anti-corrosion segment bolt for a sewage discharge shield tunnel, which has an effective waterproof and anti-corrosion effect.
In order to achieve the above purpose, the present application provides the following technical solutions:
the anti-corrosion segment bolt for the sewage discharge shield tunnel comprises a bolt body and a waterproof gasket, wherein the bolt body consists of 0.22-0.25% of Cu, 0.32-0.38% of Mn, 0.26-0.54% of Al, 0.12-0.15% of Sn, 0.42-0.48% of Mg, 0.34-0.42% of Mo, 0.26-0.35% of C, 0.05-0.08% of V, 0.01-0.03% of W, 0.08-0.12% of Si, 0.16-0.18% of Ni and the balance of iron according to mass percentage.
Through adopting above-mentioned technical scheme, waterproof gasket and bolt body match and realize promoting waterproof effect, and adopt the component preparation bolt body with corresponding mass percent to make this a corrosion prevention section of jurisdiction bolt for sewage discharge shield tunnel have effectual anticorrosive effect.
The application is further provided with: the waterproof gasket is sleeved on the rod part of the bolt body, and the two ends of the waterproof gasket are respectively provided with an air bag pressing cavity matched with the head part and a rubber ring piece for elastic abutting joint and waterproof.
Through adopting above-mentioned technical scheme, the elasticity that the rubber ring piece possessed when receiving the pressure extrusion, will make the extrusion of air bag pressure cavity to the cooperation air bag presses the internal atmospheric pressure that increases of cavity and applys effort to head and rubber ring piece, thereby reaches effective waterproof and stable purpose of connecting, and realizes anticorrosive effect in effective waterproof.
The application is further provided with: the air bag pressing cavity is provided with an inner air bag cavity, a middle air bag cavity and an outer air bag cavity which are distributed along the radial direction in sequence and the volumes of the inner air bag cavity, the middle air bag cavity and the outer air bag cavity are sequentially reduced, and connecting cavities are respectively arranged between the inner air bag cavity and the middle air bag cavity and between the middle air bag cavity and the outer air bag cavity.
Through adopting above-mentioned technical scheme, when the gasbag presses the cavity atress compression and makes interior gasbag chamber, well gasbag chamber and outer gasbag intracavity pressure increase, because interior gasbag chamber, well gasbag chamber and outer gasbag chamber's volume reduces in proper order, will make outer gasbag chamber, well gasbag chamber and interior gasbag chamber form the volume deformation state of increase gradually to make interior gasbag chamber, well gasbag chamber and outer gasbag chamber mutually cooperate the elasticity butt waterproof performance that promotes the rubber ring piece, thereby make this an anti-corrosion segment bolt for sewage discharge shield tunnel have effective waterproof in order effective anticorrosive effect.
The application is further provided with: the head is provided with a plurality of respectively with corresponding interior gasbag chamber, well gasbag chamber and outer gasbag chamber matched arc wall towards one side of pole portion, just the corresponding one side of rubber ring piece is provided with a plurality of respectively with corresponding interior gasbag chamber, well gasbag chamber and outer gasbag chamber matched bonding groove, just the rubber ring piece with one side that the head is opposite is parallel to each other.
Through adopting above-mentioned technical scheme, the effect of fixed rubber ring piece of effective bonding and gasbag pressure cavity is played to the matching bonding groove, and when interior gasbag chamber, well gasbag chamber and outer gasbag chamber are in assorted matching arc groove matched connection, will show the fixed stability of butt of lifting gasbag pressure cavity and head to when reaching effective waterproof purpose, realize anticorrosive effect.
The application is further provided with: a positioning annular insert body positioned outside the matching arc-shaped groove is arranged on one side of the head part facing the rod part, and a positioning annular groove matched with the positioning annular insert body is arranged on the corresponding side of the air bag pressing cavity; and one side of the rubber ring piece, which is far away from the head part, is provided with a plurality of concentric friction inward folding grooves.
By adopting the technical scheme, the positioning annular groove and the positioning annular insert are mutually matched and fixed, so that the stability of the abutting and fixing of the air bag pressure cavity and the head is obviously improved, and the anti-corrosion effect is realized while the aim of effective water prevention is achieved; the friction force of the contact surface of the rubber ring piece is improved by the friction inward folding groove, so that stability is further improved.
The second aim of the application is to provide a preparation method of the anti-corrosion segment bolt for the sewage discharge shield tunnel, which comprises the following steps: (1) machining a steel blank; (2) forming the head and the rod; (3) heat treatment; (4) finish machining; (5) antiseptic processing; (6) assembling; wherein in the step (1), the steel blank processing comprises the steps of placing steel ingots into an intermediate frequency electric furnace to be melted into molten steel, adding alloy auxiliary materials into the molten steel when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1180-1240 ℃, discharging and casting when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1400-1460 ℃, obtaining the steel blank, wherein the weight percentages of each component of the steel blank are 0.26-0.35% of C, 0.32-0.38% of Mn, 0.01-0.03% of W, 0.05-0.08% of V, 0.26-0.54% of Al, 0.34-0.42% of Mo, 0.22-0.25% of Cu, 0.42-0.48% of Mg, 0.12-0.15% of Sn, 0.08-0.12% of Si, 0.16-0.18% of Ni and the balance being iron.
By adopting the technical scheme, the obtained anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is remarkably improved.
The application is further provided with: in the step (3), the heat treatment comprises the steps of introducing the material molded by the head and the rod part in the step (2) into a high-temperature furnace with the temperature of 820-860 ℃ for heat preservation treatment, wherein the heat preservation treatment time is 3h; and when the carbon content reaches 0.72-0.83%, taking out the material into a tempering device, controlling the temperature of the tempering device to be 400-420 ℃, tempering for 30-45min, taking out, and cooling at room temperature.
By adopting the technical scheme, a carburized layer is formed on the outer surface of the material, so that the aims of high hardness and wear resistance are fulfilled.
The application is further provided with: in the step (4), the finishing includes machining treatment of the head and the rod, flaw detection treatment, and thread machining and burr treatment using a lathe.
By adopting the technical scheme, the finished material with stable and complete structure is obtained.
The application is further provided with: in the step (5), the anti-corrosion processing treatment comprises sequentially drying, electrophoresis, washing, baking and cooling the material subjected to the finish processing in the step (4); the drying is drying treatment by adopting a dryer, wherein the drying temperature is 50-60 ℃ and the drying time is 30s; the electrophoresis is to adopt an electrophoresis tank to carry out coloring treatment, the voltage is 155V, and the time is 60s; the flushing is to flush for 30s by clean water; the baking is carried out by adopting a baking box, wherein the baking temperature is 60-80 ℃ and the baking time is 30s; the cooling is natural cooling; the electrolyte in the electrophoresis tank comprises acrylic resin, pigment and water in a weight ratio of 6:1:8, wherein the pigment is toner.
By adopting the technical scheme, the paint layer with the anti-corrosion performance is formed on the surface, so that the obtained anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is further improved.
The application is further provided with: the acrylic resin comprises 6-8 parts by weight of dimethylaminoethyl methacrylate, 2-3 parts by weight of acrylic acid, 4-5 parts by weight of hydroxyethyl methacrylate, 2-3 parts by weight of dimethylolpropionic acid, 10-12 parts by weight of butyl cellosolve, 0.5-1 part by weight of methylated melamine resin and 10 parts by weight of water; the preparation method of the acrylic resin comprises the following steps: adding 6-8 parts by weight of dimethylaminoethyl methacrylate, 2-3 parts by weight of acrylic acid, 4-5 parts by weight of hydroxyethyl methacrylate, 10-12 parts by weight of butyl cellosolve and 0.5-1 part by weight of methylated melamine resin into a reaction kettle, stirring, controlling the temperature of the reaction kettle to be 80 ℃ for 6 hours, adding 10 parts by weight of water and 2-3 parts by weight of dimethylolpropionic acid after stirring is completed, and continuously stirring to obtain the acrylic resin.
By adopting the technical scheme, the methylated melamine resin and the acrylic resin form a three-dimensional space net shape when being solidified, and the alkoxy reacts with the hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
In summary, the application has the following beneficial effects: the anti-corrosion segment bolt for the sewage discharge shield tunnel is formed by combining the bolt body and the waterproof gasket, so that the composition and the connecting structure of the anti-corrosion segment bolt for the sewage discharge shield tunnel are further optimized, and the head and the rubber ring piece are applied with acting force by matching with the air pressure increased in the air bag pressure cavity when the air bag pressure cavity is subjected to compression deformation, so that the aims of effective waterproof and stable connection are achieved; meanwhile, the methylated melamine resin and the acrylic resin form a three-dimensional space network during curing, and the alkoxy reacts with hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
Drawings
FIG. 1 is a schematic cross-sectional structure of the present embodiment;
fig. 2 is an enlarged schematic view of the portion a in fig. 1.
Reference numerals illustrate: 1. a bolt body; 11. a stem portion; 12. a head; 121. matching the arc-shaped grooves; 122. positioning the annular insert; 13. a waterproof gasket; 131. a balloon pressure chamber; 1311. an inner balloon cavity; 1312. a middle balloon cavity; 1313. an outer balloon cavity; 1314. a connecting cavity; 1415. positioning the annular groove; 132. rubber ring pieces; 1321. friction inner folding groove; 1322. matching the bonding grooves.
Detailed Description
In order to make the technical solution and advantages of the present application more apparent, the present application will be described in more detail below with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following specifically describes an anti-corrosion segment bolt for a sewage discharge shield tunnel and a preparation method thereof according to an embodiment of the present application:
as shown in fig. 1, an anti-corrosion segment bolt for a sewage discharge shield tunnel comprises a bolt body 1 consisting of a head 12 and a rod 11, and a waterproof gasket 13.
Wherein the bolt body 1 consists of, by mass, 0.22-0.25% of Cu, 0.32-0.38% of Mn, 0.26-0.54% of Al, 0.12-0.15% of Sn, 0.42-0.48% of Mg, 0.34-0.42% of Mo, 0.26-0.35% of C, 0.05-0.08% of V, 0.01-0.03% of W, 0.08-0.12% of Si, 0.16-0.18% of Ni and the balance of iron. Therefore, the waterproof gasket 13 and the bolt body 1 are matched to achieve the effect of improving the waterproof performance, and the bolt body 1 is prepared by adopting components with corresponding mass percentages, so that the anti-corrosion segment bolt for the sewage discharge shield tunnel has an effective anti-corrosion effect.
As shown in fig. 1 and 2, the waterproof gasket 13 is sleeved on the rod portion 11 of the bolt body 1, and both ends of the waterproof gasket 13 are respectively provided with an air bag pressing cavity 131 matched with the head 12 and a rubber ring piece 132 for elastic abutting waterproof. The elasticity that rubber ring piece 132 possessed will make the gasbag press cavity 131 extrude when receiving the pressure extrusion to the cooperation gasbag presses the interior atmospheric pressure that increases of cavity 131 and applys effort to head 12 and rubber ring piece 132, thereby reaches effective waterproof and stable purpose of connecting, and realizes anticorrosive effect in effective waterproof. The inner balloon chamber 1311, the middle balloon chamber 1312, and the outer balloon chamber 1313, which are sequentially distributed in the radial direction and sequentially decrease in volume, are provided in the balloon pressure chamber 131. The connecting cavities 1314 are arranged between the inner air bag cavity 1311 and the middle air bag cavity 1312 and between the middle air bag cavity 1312 and the outer air bag cavity 1313, and when the air bag pressure cavity 131 is compressed by force to increase the pressure in the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313, the volumes of the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313 are sequentially reduced, so that the outer air bag cavity 1313, the middle air bag cavity 1312 and the inner air bag cavity 1311 form a gradually-increased volume deformation state, the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313 mutually cooperate to promote the elastic abutting waterproof performance of the rubber ring piece 132, and the anti-corrosion segment bolt for the sewage discharge shield tunnel has the effects of effective waterproof and effective corrosion prevention.
Meanwhile, a plurality of matching arc grooves 121 respectively matching the corresponding inner, middle and outer balloon cavities 1311, 1312 and 1313 are provided at a side of the head 12 facing the stem 11, and a plurality of matching adhesive grooves 1322 respectively matching the corresponding inner, middle and outer balloon cavities 1311, 1312 and 1313 are provided at a corresponding side of the rubber ring 132, and side surfaces of the rubber ring 132 opposite to the head 12 are parallel to each other. Therefore, the matching bonding groove 1322 plays a role in effectively bonding and fixing the rubber ring sheet 132 and the air bag pressing cavity 131, and when the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313 are in matching connection with the matched arc-shaped groove 121, the stability of abutting and fixing the air bag pressing cavity 131 and the head 12 is obviously improved, so that the anti-corrosion effect is achieved while the aim of effective water prevention is achieved. It should be mentioned that a positioning annular insert 122 is provided on the side of the head 12 facing the shank 11, outside the matching arcuate slot 121. A positioning annular groove 1415 is provided on a corresponding side of the balloon compression chamber 131 to mate with the positioning annular insert 122. The side of the rubber ring 132 remote from the head 12 is provided with a plurality of concentric friction invagination grooves 1321. The mutual matching and fixing of the positioning annular groove 1415 and the positioning annular insert 122 will play a role in significantly improving the stability of the abutting and fixing of the air bag pressure cavity 131 and the head 12, thereby achieving the anti-corrosion effect while achieving the purpose of effective water resistance; the friction inward folding groove 1321 plays a role in lifting friction force of the contact surface of the rubber ring piece 132, thereby further improving stability.
The application also provides a preparation method of the anti-corrosion segment bolt for the sewage discharge shield tunnel, which comprises the following steps: (1) machining a steel blank; (2) the head 12 and the stem 11 are formed; (3) heat treatment; (4) finish machining; (5) antiseptic processing; (6) and (5) assembling.
In the step (1), steel ingot processing comprises the steps of placing steel ingots into an intermediate frequency electric furnace to be melted into molten steel, adding alloy auxiliary materials into the molten steel when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1180-1240 ℃, discharging and pouring when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1400-1460 ℃, obtaining the steel ingot, wherein the weight percentages of all components of the steel ingot are 0.26-0.35% of C, 0.32-0.38% of Mn, 0.01-0.03% of W, 0.05-0.08% of V, 0.26-0.54% of Al, 0.34-0.42% of Mo, 0.22-0.25% of Cu, 0.42-0.48% of Mg, 0.12-0.15% of Sn, 0.08-0.12% of Si, 0.16-0.18% of Ni and the balance being iron, so as to realize remarkably-improved corrosion resistance of the segment for a sewage discharge shield tunnel.
In step (2), the head 12 and the shaft 11 are formed by machining.
In the step (3), the heat treatment comprises the steps of introducing the material molded by the head 12 and the rod 11 in the step (2) into a high-temperature furnace with the temperature of 820-860 ℃ for heat preservation treatment, wherein the heat preservation treatment time is 3h; and when the carbon content reaches 0.72-0.83%, taking out the material into a tempering device, controlling the temperature of the tempering device to be 400-420 ℃, tempering for 30-45min, taking out the material, and cooling the material at room temperature to form a carburized layer on the outer surface of the material so as to achieve the purposes of high hardness and wear resistance.
In step (4), the finishing includes machining treatment of the head portion 12 and the shaft portion 11, flaw detection treatment, and thread machining and burr treatment with a lathe to obtain a structurally stable and complete finished material.
In the step (5), the anti-corrosion processing treatment comprises the steps of sequentially drying, electrophoresis, washing, baking and cooling the material subjected to the finish processing in the step (4); the drying is drying treatment by adopting a dryer, wherein the drying temperature is 50-60 ℃ and the drying time is 30s; the electrophoresis is to adopt an electrophoresis tank to carry out coloring treatment, the voltage is 155V, and the time is 60s; the flushing is to flush for 30s by clean water; the baking is carried out by adopting a baking box, wherein the baking temperature is 60-80 ℃ and the baking time is 30s; the cooling is natural cooling; the electrolyte in the electrophoresis tank comprises acrylic resin, pigment and water in a weight ratio of 6:1:8, wherein the pigment is toner so as to form a paint layer with anti-corrosion performance on the surface, and the anti-corrosion performance of the obtained anti-corrosion segment bolt for the sewage discharge shield tunnel is further improved.
The acrylic resin comprises 6-8 parts by weight of dimethylaminoethyl methacrylate, 2-3 parts by weight of acrylic acid, 4-5 parts by weight of hydroxyethyl methacrylate, 2-3 parts by weight of dimethylolpropionic acid, 10-12 parts by weight of butyl cellosolve, 0.5-1 part by weight of methylated melamine resin and 10 parts by weight of water. And the preparation method of the acrylic resin comprises the following steps: adding 6-8 parts by weight of dimethylaminoethyl methacrylate, 2-3 parts by weight of acrylic acid, 4-5 parts by weight of hydroxyethyl methacrylate, 10-12 parts by weight of butyl cellosolve and 0.5-1 part by weight of methylated melamine resin into a reaction kettle, stirring, controlling the temperature of the reaction kettle to be 80 ℃ for 6 hours, adding 10 parts by weight of water and 2-3 parts by weight of dimethylolpropionic acid after stirring is completed, and continuously stirring to obtain the modified melamine resin. Therefore, the three-dimensional space network is formed by the methylated melamine resin and the acrylic resin during curing, and the alkoxy reacts with the hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
Example 1
As shown in fig. 1, an anti-corrosion segment bolt for a sewage discharge shield tunnel comprises a bolt body 1 consisting of a head 12 and a rod 11, and a waterproof gasket 13.
Wherein the bolt body 1 is composed of, by mass, 0.22% of Cu, 0.32% of Mn, 0.26% of Al, 0.12% of Sn, 0.42% of Mg, 0.34% of Mo, 0.26% of C, 0.05% of V, 0.01% of W, 0.08% of Si, 0.16% of Ni, and the balance being iron. Therefore, the waterproof gasket 13 and the bolt body 1 are matched to achieve the effect of improving the waterproof performance, and the bolt body 1 is prepared by adopting components with corresponding mass percentages, so that the anti-corrosion segment bolt for the sewage discharge shield tunnel has an effective anti-corrosion effect.
As shown in fig. 1 and 2, the waterproof gasket 13 is sleeved on the rod portion 11 of the bolt body 1, and both ends of the waterproof gasket 13 are respectively provided with an air bag pressing cavity 131 matched with the head 12 and a rubber ring piece 132 for elastic abutting waterproof. The elasticity that rubber ring piece 132 possessed will make the gasbag press cavity 131 extrude when receiving the pressure extrusion to the cooperation gasbag presses the interior atmospheric pressure that increases of cavity 131 and applys effort to head 12 and rubber ring piece 132, thereby reaches effective waterproof and stable purpose of connecting, and realizes anticorrosive effect in effective waterproof. The inner balloon chamber 1311, the middle balloon chamber 1312, and the outer balloon chamber 1313, which are sequentially distributed in the radial direction and sequentially decrease in volume, are provided in the balloon pressure chamber 131. The connecting cavities 1314 are arranged between the inner air bag cavity 1311 and the middle air bag cavity 1312 and between the middle air bag cavity 1312 and the outer air bag cavity 1313, and when the air bag pressure cavity 131 is compressed by force to increase the pressure in the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313, the volumes of the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313 are sequentially reduced, so that the outer air bag cavity 1313, the middle air bag cavity 1312 and the inner air bag cavity 1311 form a gradually-increased volume deformation state, the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313 mutually cooperate to promote the elastic abutting waterproof performance of the rubber ring piece 132, and the anti-corrosion segment bolt for the sewage discharge shield tunnel has the effects of effective waterproof and effective corrosion prevention.
Meanwhile, a plurality of matching arc grooves 121 respectively matching the corresponding inner, middle and outer balloon cavities 1311, 1312 and 1313 are provided at a side of the head 12 facing the stem 11, and a plurality of matching adhesive grooves 1322 respectively matching the corresponding inner, middle and outer balloon cavities 1311, 1312 and 1313 are provided at a corresponding side of the rubber ring 132, and side surfaces of the rubber ring 132 opposite to the head 12 are parallel to each other. Therefore, the matching bonding groove 1322 plays a role in effectively bonding and fixing the rubber ring sheet 132 and the air bag pressing cavity 131, and when the inner air bag cavity 1311, the middle air bag cavity 1312 and the outer air bag cavity 1313 are in matching connection with the matched arc-shaped groove 121, the stability of abutting and fixing the air bag pressing cavity 131 and the head 12 is obviously improved, so that the anti-corrosion effect is achieved while the aim of effective water prevention is achieved. It should be mentioned that a positioning annular insert 122 is provided on the side of the head 12 facing the shank 11, outside the matching arcuate slot 121. A positioning annular groove 1415 is provided on a corresponding side of the balloon compression chamber 131 to mate with the positioning annular insert 122. The side of the rubber ring 132 remote from the head 12 is provided with a plurality of concentric friction invagination grooves 1321. The mutual matching and fixing of the positioning annular groove 1415 and the positioning annular insert 122 will play a role in significantly improving the stability of the abutting and fixing of the air bag pressure cavity 131 and the head 12, thereby achieving the anti-corrosion effect while achieving the purpose of effective water resistance; the friction inward folding groove 1321 plays a role in lifting friction force of the contact surface of the rubber ring piece 132, thereby further improving stability.
The application also provides a preparation method of the anti-corrosion segment bolt for the sewage discharge shield tunnel, which comprises the following steps: (1) machining a steel blank; (2) the head 12 and the stem 11 are formed; (3) heat treatment; (4) finish machining; (5) antiseptic processing; (6) and (5) assembling.
In the step (1), steel ingot processing comprises the steps of placing steel ingots into an intermediate frequency electric furnace to be melted into molten steel, adding alloy auxiliary materials into the molten steel when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1180 ℃, discharging and pouring when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1400 ℃, obtaining steel ingots, wherein the steel ingots comprise 0.26% of C, 0.32% of Mn, 0.01% of W, 0.05% of V, 0.26% of Al, 0.34% of Mo, 0.22% of Cu, 0.42% of Mg, 0.12% of Sn, 0.08% of Si, 0.16% of Ni and the balance of iron in percentage by weight, so as to realize the remarkable improvement of the corrosion resistance of the obtained corrosion-resistant bolt for the sewage discharge shield tunnel.
In step (2), the head 12 and the shaft 11 are formed by machining.
In the step (3), the heat treatment includes heat-preserving the material molded by the head 12 and the shaft 11 of the step (2) in a high-temperature furnace at 820 ℃ for 3 hours; and when the carbon content reaches 0.72% on the surface of the material, taking out the material into a tempering device, controlling the temperature of the tempering device to be 400 ℃, tempering for 30min, taking out the material, and cooling the material at room temperature to form a carburized layer on the outer surface of the material so as to achieve the purposes of high hardness and wear resistance.
In step (4), the finishing includes machining treatment of the head portion 12 and the shaft portion 11, flaw detection treatment, and thread machining and burr treatment with a lathe to obtain a structurally stable and complete finished material.
In the step (5), the anti-corrosion processing treatment comprises the steps of sequentially drying, electrophoresis, washing, baking and cooling the material subjected to the finish processing in the step (4); the drying is drying treatment by adopting a dryer, wherein the drying temperature is 50 ℃ and the drying time is 30s; the electrophoresis is to adopt an electrophoresis tank to carry out coloring treatment, the voltage is 155V, and the time is 60s; the flushing is to flush for 30s by clean water; the baking is carried out by adopting a baking box, wherein the baking temperature is 60 ℃ and the baking time is 30s; the cooling is natural cooling; the electrolyte in the electrophoresis tank comprises acrylic resin, pigment and water in a weight ratio of 6:1:8, wherein the pigment is toner so as to form a paint layer with anti-corrosion performance on the surface, and the anti-corrosion performance of the obtained anti-corrosion segment bolt for the sewage discharge shield tunnel is further improved.
The acrylic resin includes 6 parts by weight of dimethylaminoethyl methacrylate, 2 parts by weight of acrylic acid, 4 parts by weight of hydroxyethyl methacrylate, 2 parts by weight of dimethylol propionic acid, 10 parts by weight of butyl cellosolve, 0.5 part by weight of methylated melamine resin, and 10 parts by weight of water. And the preparation method of the acrylic resin comprises the following steps: 6 parts by weight of dimethylaminoethyl methacrylate, 2 parts by weight of acrylic acid, 4 parts by weight of hydroxyethyl methacrylate, 10 parts by weight of butyl cellosolve and 0.5 part by weight of methylated melamine resin are added into a reaction kettle to be stirred, the temperature of the reaction kettle is controlled to be 80 ℃ for 6 hours, and 10 parts by weight of water and 2 parts by weight of dimethylolpropionic acid are added after the stirring is completed, and the mixture is continuously stirred and obtained. Therefore, the three-dimensional space network is formed by the methylated melamine resin and the acrylic resin during curing, and the alkoxy reacts with the hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
Corrosion resistance was evaluated by a brine spray test.
Specifically, the salt spray test was performed for 2000 hours. The time elapsed before the visual detection of rust, i.e., the time at which the rust began, was measured to evaluate the corrosion resistance. The anti-corrosion segment bolt for a sewage discharge shield tunnel obtained by the first embodiment has a rust start time of 3000 hours or more with a coating thickness of 2 mm.
Example two
The second embodiment differs from the first embodiment in that the bolt body 1 in the second embodiment is composed of, by mass, 0.24% Cu, 0.35% Mn, 0.42% Al, 0.13% Sn, 0.45% Mg, 0.39% Mo, 0.30% C, 0.06% V, 0.02% W, 0.10% Si, 0.17% Ni, and the balance being iron.
In the step (1) of the method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel, steel blank processing comprises the steps of placing steel ingots into an intermediate frequency electric furnace to be melted into molten steel, adding alloy auxiliary materials into the molten steel when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1210 ℃, discharging and pouring when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1430 ℃, obtaining the steel blank, wherein the steel blank comprises the components of 0.24% of Cu, 0.35% of Mn, 0.42% of Al, 0.13% of Sn, 0.45% of Mg, 0.39% of Mo, 0.30% of C, 0.06% of V, 0.02% of W, 0.10% of Si, 0.17% of Ni and the balance of iron in percentage by weight, so as to realize the anti-corrosion performance of the obtained anti-corrosion segment bolt for the sewage discharge shield tunnel.
In the step (3), the heat treatment includes heat-preserving the material molded by the head portion 12 and the shaft portion 11 of the step (2) in a high-temperature furnace having a temperature of 840 ℃ for 3 hours; and when the carbon content reaches 0.78%, taking out the material into a tempering device, controlling the temperature of the tempering device to be 410 ℃, tempering for 37min, taking out the material, and cooling the material at room temperature to form a carburized layer on the outer surface of the material so as to achieve the purposes of high hardness and wear resistance.
In the step (5), the anti-corrosion processing treatment comprises sequentially drying, electrophoresis, washing, baking and cooling the material subjected to the finish processing in the step (4); the drying is drying treatment by adopting a dryer, wherein the drying temperature is 55 ℃ and the drying time is 30s; the electrophoresis is to adopt an electrophoresis tank to carry out coloring treatment, the voltage is 155V, and the time is 60s; the flushing is to flush for 30s by clean water; the baking is carried out by adopting a baking box, wherein the baking temperature is 70 ℃ and the baking time is 30s; the cooling is natural cooling; the electrolyte in the electrophoresis tank comprises acrylic resin, pigment and water in a weight ratio of 6:1:8, wherein the pigment is toner so as to form a paint layer with anti-corrosion performance on the surface, and the anti-corrosion performance of the obtained anti-corrosion segment bolt for the sewage discharge shield tunnel is further improved.
Wherein the acrylic resin comprises 7 parts by weight of dimethylaminoethyl methacrylate, 2.5 parts by weight of acrylic acid, 4.5 parts by weight of hydroxyethyl methacrylate, 2.5 parts by weight of dimethylolpropionic acid, 11 parts by weight of butyl cellosolve, 0.7 part by weight of methylated melamine resin and 10 parts by weight of water. And the preparation method of the acrylic resin comprises the following steps: 7 parts by weight of dimethylaminoethyl methacrylate, 2.5 parts by weight of acrylic acid, 4.5 parts by weight of hydroxyethyl methacrylate, 11 parts by weight of butyl cellosolve and 0.7 part by weight of methylated melamine resin are added into a reaction kettle, stirred, the temperature of the reaction kettle is controlled to be 80 ℃ for 6 hours, and 10 parts by weight of water and 2.5 parts by weight of dimethylolpropionic acid are added after the stirring is completed, and the mixture is continuously stirred and obtained. Therefore, the three-dimensional space network is formed by the methylated melamine resin and the acrylic resin during curing, and the alkoxy reacts with the hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
Corrosion resistance was evaluated by a brine spray test.
Specifically, the salt spray test was performed for 2000 hours. The time elapsed before the visual detection of rust, i.e., the time at which the rust began, was measured to evaluate the corrosion resistance. The anti-corrosion segment bolt for the sewage discharge shield tunnel obtained in example two has a rust start time of 3000 hours or more with a coating thickness of 2 mm.
Example III
The third embodiment differs from the first embodiment in that the bolt body 1 in the third embodiment is composed of, by mass, 0.25% Cu, 0.38% Mn, 0.54% Al, 0.15% Sn, 0.48% Mg, 0.42% Mo, 0.35% C, 0.08% V, 0.03% W, 0.12% Si, 0.18% Ni, and the balance being iron.
In the step (1) of the method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel, the steel blank processing comprises the steps of placing steel ingots into an intermediate frequency electric furnace to be melted into molten steel, adding alloy auxiliary materials into the molten steel when the temperature of the intermediate frequency electric furnace is controlled to rise to 1240 ℃, discharging and pouring when the temperature of the intermediate frequency electric furnace is controlled to rise to 1460 ℃, obtaining the steel blank, wherein the steel blank comprises 0.35% of C, 0.38% of Mn, 0.03% of W, 0.08% of V, 0.54% of Al, 0.42% of Mo, 0.25% of Cu, 0.48% of Mg, 0.15% of Sn, 0.12% of Si, 0.18% of Ni and the balance being iron according to the weight percentage, so as to realize the anti-corrosion performance of the obtained anti-corrosion segment bolt for the sewage discharge shield tunnel.
In the step (3), the heat treatment comprises introducing the material molded by the head 12 and the shaft 11 of the step (2) into a high temperature furnace at 860 ℃ for heat preservation treatment, and the heat preservation treatment time is 3 hours; and when the carbon content reaches 0.83%, taking out the material into a tempering device, controlling the temperature of the tempering device to be 420 ℃, tempering for 45min, taking out the material, and cooling the material at room temperature to form a carburized layer on the outer surface of the material so as to achieve the purposes of high hardness and wear resistance.
In the step (5), the anti-corrosion processing treatment comprises sequentially drying, electrophoresis, washing, baking and cooling the material subjected to the finish processing in the step (4); the drying is drying treatment by adopting a dryer, wherein the drying temperature is 60 ℃ and the drying time is 30s; the electrophoresis is to adopt an electrophoresis tank to carry out coloring treatment, the voltage is 155V, and the time is 60s; the flushing is to flush for 30s by clean water; the baking is carried out by adopting a baking box, wherein the baking temperature is 80 ℃ and the baking time is 30s; the cooling is natural cooling; the electrolyte in the electrophoresis tank comprises acrylic resin, pigment and water in a weight ratio of 6:1:8, wherein the pigment is toner so as to form a paint layer with anti-corrosion performance on the surface, and the anti-corrosion performance of the obtained anti-corrosion segment bolt for the sewage discharge shield tunnel is further improved.
Wherein the acrylic resin comprises 8 parts by weight of dimethylaminoethyl methacrylate, 3 parts by weight of acrylic acid, 5 parts by weight of hydroxyethyl methacrylate, 3 parts by weight of dimethylol propionic acid, 12 parts by weight of butyl cellosolve, 1 part by weight of methylated melamine resin and 10 parts by weight of water. And the preparation method of the acrylic resin comprises the following steps: 8 parts of dimethylaminoethyl methacrylate, 3 parts of acrylic acid, 5 parts of hydroxyethyl methacrylate, 12 parts of butyl cellosolve and 1 part of methylated melamine resin are added into a reaction kettle for stirring, the temperature of the reaction kettle is controlled to be 80 ℃ for 6 hours, and 10 parts of water and 3 parts of dimethylolpropionic acid by weight are added after the stirring is completed, and the mixture is continuously stirred and obtained. Therefore, the three-dimensional space network is formed by the methylated melamine resin and the acrylic resin during curing, and the alkoxy reacts with the hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
Corrosion resistance was evaluated by a brine spray test.
Specifically, the salt spray test was performed for 2000 hours. The time elapsed before the visual detection of rust, i.e., the time at which the rust began, was measured to evaluate the corrosion resistance. The anti-corrosion segment bolt for a sewage discharge shield tunnel obtained by the third embodiment has a rust start time of 3000 hours or more with a coating thickness of 2 mm.
In summary, the anti-corrosion segment bolt for the sewage discharge shield tunnel is formed by combining the bolt body 1 and the waterproof gasket 13, so that the composition and the connecting structure of the anti-corrosion segment bolt for the sewage discharge shield tunnel are further optimized, and the head 12 and the rubber ring 132 are applied with acting force by matching with the air pressure increased in the air bag pressure cavity 131 when the air bag pressure cavity 131 is subjected to compression deformation, so that the aims of effective waterproof and stable connection are achieved; meanwhile, the methylated melamine resin and the acrylic resin form a three-dimensional space network during curing, and the alkoxy reacts with hydroxyl in the acrylic resin, so that the anti-corrosion performance of the anti-corrosion segment bolt for the sewage discharge shield tunnel is obviously improved under the mutual cooperation of the corresponding components.
The references to "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects from each other and are not necessarily used to describe a particular order or sequence. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, or apparatus.
It should be noted that the description of "first", "second", etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims (7)

1. The anti-corrosion segment bolt for the sewage discharge shield tunnel is characterized by comprising a bolt body and a waterproof gasket, wherein the bolt body consists of 0.22-0.25% of Cu, 0.32-0.38% of Mn, 0.26-0.54% of Al, 0.12-0.15% of Sn, 0.42-0.48% of Mg, 0.34-0.42% of Mo, 0.26-0.35% of C, 0.05-0.08% of V, 0.01-0.03% of W, 0.08-0.12% of Si, 0.16-0.18% of Ni and the balance of iron in percentage by mass; wherein:
the waterproof gasket is sleeved on the rod part of the bolt body, and the two ends of the waterproof gasket are respectively provided with an air bag pressing cavity matched with the head part and a rubber ring piece for elastically abutting against water; the air bag pressing cavity is provided with an inner air bag cavity, a middle air bag cavity and an outer air bag cavity which are sequentially distributed along the radial direction and sequentially reduced in volume, and connecting cavities are respectively arranged between the inner air bag cavity and the middle air bag cavity and between the middle air bag cavity and the outer air bag cavity; the head is provided with a plurality of respectively with corresponding interior gasbag chamber, well gasbag chamber and outer gasbag chamber matched arc wall towards one side of pole portion, just the corresponding one side of rubber ring piece is provided with a plurality of respectively with corresponding interior gasbag chamber, well gasbag chamber and outer gasbag chamber matched bonding groove, just the rubber ring piece with one side that the head is opposite is parallel to each other.
2. The anti-corrosion segment bolt for a sewage discharge shield tunnel according to claim 1, wherein: a positioning annular insert body positioned outside the matching arc-shaped groove is arranged on one side of the head part facing the rod part, and a positioning annular groove matched with the positioning annular insert body is arranged on the corresponding side of the air bag pressing cavity; and one side of the rubber ring piece, which is far away from the head part, is provided with a plurality of concentric friction inward folding grooves.
3. The method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel according to any one of claims 1 to 2, which is characterized by comprising the following steps: (1) machining a steel blank; (2) forming the head and the rod; (3) heat treatment; (4) finish machining; (5) antiseptic processing; (6) assembling; wherein in the step (1), the steel blank processing comprises the steps of placing steel ingots into an intermediate frequency electric furnace to be melted into molten steel, adding alloy auxiliary materials into the molten steel when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1180-1240 ℃, discharging and casting when the temperature of the intermediate frequency electric furnace is controlled to be raised to 1400-1460 ℃, obtaining the steel blank, wherein the weight percentages of each component of the steel blank are 0.26-0.35% of C, 0.32-0.38% of Mn, 0.01-0.03% of W, 0.05-0.08% of V, 0.26-0.54% of Al, 0.34-0.42% of Mo, 0.22-0.25% of Cu, 0.42-0.48% of Mg, 0.12-0.15% of Sn, 0.08-0.12% of Si, 0.16-0.18% of Ni and the balance being iron.
4. The method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel according to claim 3, wherein the method comprises the following steps: in the step (3), the heat treatment comprises the steps of introducing the material molded by the head and the rod part in the step (2) into a high-temperature furnace with the temperature of 820-860 ℃ for heat preservation treatment, wherein the heat preservation treatment time is 3h; and when the carbon content reaches 0.72-0.83%, taking out the material into a tempering device, controlling the temperature of the tempering device to be 400-420 ℃, tempering for 30-45min, taking out, and cooling at room temperature.
5. The method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel according to claim 3, wherein the method comprises the following steps: in the step (4), the finishing includes machining treatment of the head and the rod, flaw detection treatment, and thread machining and burr treatment using a lathe.
6. The method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel according to claim 4, which is characterized in that: in the step (5), the anti-corrosion processing treatment comprises sequentially drying, electrophoresis, washing, baking and cooling the material subjected to the finish processing in the step (4); the drying is drying treatment by adopting a dryer, wherein the drying temperature is 50-60 ℃ and the drying time is 30s; the electrophoresis is to adopt an electrophoresis tank to carry out coloring treatment, the voltage is 155V, and the time is 60s; the flushing is to flush for 30s by clean water; the baking is carried out by adopting a baking box, wherein the baking temperature is 60-80 ℃ and the baking time is 30s; the cooling is natural cooling; the electrolyte in the electrophoresis tank comprises acrylic resin, pigment and water in a weight ratio of 6:1:8, wherein the pigment is toner.
7. The method for preparing the anti-corrosion segment bolt for the sewage discharge shield tunnel according to claim 6, wherein the method comprises the following steps: the acrylic resin comprises 6-8 parts by weight of dimethylaminoethyl methacrylate, 2-3 parts by weight of acrylic acid, 4-5 parts by weight of hydroxyethyl methacrylate, 2-3 parts by weight of dimethylolpropionic acid, 10-12 parts by weight of butyl cellosolve, 0.5-1 part by weight of methylated melamine resin and 10 parts by weight of water; the preparation method of the acrylic resin comprises the following steps: adding 6-8 parts by weight of dimethylaminoethyl methacrylate, 2-3 parts by weight of acrylic acid, 4-5 parts by weight of hydroxyethyl methacrylate, 10-12 parts by weight of butyl cellosolve and 0.5-1 part by weight of methylated melamine resin into a reaction kettle, stirring, controlling the temperature of the reaction kettle to be 80 ℃ for 6 hours, adding 10 parts by weight of water and 2-3 parts by weight of dimethylolpropionic acid after stirring is completed, and continuously stirring to obtain the acrylic resin.
CN202210201236.6A 2022-03-02 2022-03-02 Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof Active CN114542572B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210201236.6A CN114542572B (en) 2022-03-02 2022-03-02 Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210201236.6A CN114542572B (en) 2022-03-02 2022-03-02 Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof

Publications (2)

Publication Number Publication Date
CN114542572A CN114542572A (en) 2022-05-27
CN114542572B true CN114542572B (en) 2023-10-24

Family

ID=81662168

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210201236.6A Active CN114542572B (en) 2022-03-02 2022-03-02 Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114542572B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10121891A (en) * 1996-10-17 1998-05-12 Seibu Kensetsu Kk Segment for shield lining
CN205207399U (en) * 2015-12-18 2016-05-04 宝钢工程技术集团有限公司 Anticorrosive jacket section of thick bamboo bolt
JP3218506U (en) * 2018-08-08 2018-10-18 株式会社アルテス High corrosion resistance fastener
JP2019178381A (en) * 2018-03-30 2019-10-17 日鉄ステンレス株式会社 Austenite-ferrite two-phase stainless steel wire for bolts and bolt including the same
CN111425208A (en) * 2020-03-30 2020-07-17 济南市市政工程设计研究院（集团）有限责任公司 Anti-suspension device, system and method based on shield segment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10121891A (en) * 1996-10-17 1998-05-12 Seibu Kensetsu Kk Segment for shield lining
CN205207399U (en) * 2015-12-18 2016-05-04 宝钢工程技术集团有限公司 Anticorrosive jacket section of thick bamboo bolt
JP2019178381A (en) * 2018-03-30 2019-10-17 日鉄ステンレス株式会社 Austenite-ferrite two-phase stainless steel wire for bolts and bolt including the same
JP3218506U (en) * 2018-08-08 2018-10-18 株式会社アルテス High corrosion resistance fastener
CN111425208A (en) * 2020-03-30 2020-07-17 济南市市政工程设计研究院（集团）有限责任公司 Anti-suspension device, system and method based on shield segment

Also Published As

Publication number Publication date
CN114542572A (en) 2022-05-27

Similar Documents

Publication Publication Date Title
CN103878338B (en) A kind of processing technology of automobile engine end cap
CN101824564A (en) Titanium alloy TC4 cold-rolled tube and production method thereof
EP2411708A1 (en) Nitriding grade steel material composition for manufacturing piston rings and cylinder liners
CN105036632A (en) Synthesized counterweight filler
CN107794417B (en) A kind of production technology of motor case
CN114542572B (en) Corrosion-resistant segment bolt for sewage discharge shield tunnel and preparation method thereof
CN114806231B (en) Prebaked anode anti-oxidation coating capable of reducing energy consumption of aluminum electrolysis cell and preparation and application methods thereof
CN106633803A (en) Polyurethane rubber roller and preparation method thereof
CN111589874B (en) Combined roller manufactured in environment-friendly mode and manufacturing method thereof
CN111826687A (en) Processing technology of surface coating of stainless steel MIM product
CN111748714A (en) Anodic oxidation die-casting aluminum alloy material and preparation method thereof
CN108637181A (en) A kind of casting technique of heavy duty diesel engine cylinder body
KR101872436B1 (en) Surface treated method for enhancing acid-resistance and alkali-resistance of aluminum series matter and aluminum series matter by manufacturing the same
CN108754259A (en) A kind of high-strength aluminum alloy section and its processing method
CN211037534U (en) Steel structure plate with waterproof function
CN114221068B (en) Alkaline battery case and surface treatment method thereof
CN219933693U (en) Disc type steam trap
CN217351507U (en) Co-infiltration furnace for anticorrosive treatment of steel surface
CN108034860B (en) A kind of production technology of anticorrosion aluminium ally section for building
CN221002194U (en) Anti-aging concrete pole
CN111718146A (en) FS102 concrete waterproof compacting agent
CN210212380U (en) High-strength ultrathin high-iron aluminum profile
CN219756972U (en) Protective structure of heat preservation cylinder
CN114774784B (en) Large-caliber alloy steel pipe fitting and processing technology thereof
CN204574916U (en) Cooling tower anti-corrosion structure

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