CN112921235A - Low-temperature-resistant corrosion-resistant high-strength valve for deep sea and manufacturing method thereof - Google Patents

Low-temperature-resistant corrosion-resistant high-strength valve for deep sea and manufacturing method thereof Download PDF

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Publication number
CN112921235A
CN112921235A CN202011565317.1A CN202011565317A CN112921235A CN 112921235 A CN112921235 A CN 112921235A CN 202011565317 A CN202011565317 A CN 202011565317A CN 112921235 A CN112921235 A CN 112921235A
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valve body
valve
temperature
resistant
corrosion
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夏益明
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Zhangjiagang Hongyuan Mechanical Forging Co ltd
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Zhangjiagang Hongyuan Mechanical Forging Co ltd
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    • 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
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/06—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K49/00—Means in or on valves for heating or cooling
    • F16K49/002—Electric heating means

Abstract

The invention is suitable for the technical field of refrigeration equipment, and provides a low-temperature-resistant corrosion-resistant high-strength valve for deep sea and a manufacturing method thereof, wherein the valve comprises a valve body, two pipelines communicated with an inlet end and an outlet end are arranged in the valve body, a valve body for controlling on-off is arranged between the two pipelines, the pipelines are arranged into a telescopic expansion structure, two ends of the pipelines are fixed with the inner wall of the valve body through flexible sleeves, and the pipelines are formed by adjacent large arc sheets and small arc sheets which are spliced and arranged at intervals in an annular manner and are used for adapting to different pressure conditions in the deep sea and ensuring internal circulation; adopt the expansion ring and the flexible band of expandable and shrink, carry out automatic flexible adaptation to pressure under water, avoid because the card of heat shrinking and lead to appearing the crackle and so on, increased and decreased the effect of resistance to deformation, use special the ratio of joining in marriage simultaneously and cast the valve body for the valve body has outstanding compressive strength and corrosion resistance and lower fragility simultaneously.

Description

Low-temperature-resistant corrosion-resistant high-strength valve for deep sea and manufacturing method thereof
Technical Field
The invention belongs to the technical field of underwater valves, and particularly relates to a low-temperature-resistant corrosion-resistant high-strength valve for deep sea and a manufacturing method thereof.
Background
The valve is a device for controlling the direction, pressure and flow of fluid in a fluid system, and is a device capable of controlling the flow of a medium (liquid, gas or powder) in a pipe or equipment by flowing or stopping the medium.
At present, the underwater valve is easy to deform due to external pressure or the surface of the valve body is corroded due to the operation environment, so that the underwater valve needs to be frequently replaced.
Disclosure of Invention
The invention provides a low-temperature-resistant corrosion-resistant high-strength valve for deep sea and a manufacturing method thereof, and aims to solve the problem that an underwater valve is easy to deform due to external environment.
The invention is realized in such a way, the high-strength valve for the deep sea with low temperature resistance and corrosion resistance comprises a valve body, wherein two pipelines communicated with an inlet end and an outlet end are arranged in the valve body, a valve body for controlling on-off is arranged between the two pipelines, the pipelines are arranged into a telescopic expansion structure, the two ends of the pipelines are fixed with the inner wall of the valve body through flexible sleeves, and the pipelines are formed by adjacent large arc sheets and small arc sheets which are inserted and arranged at intervals in an annular manner and are used for adapting to different pressure conditions in the deep sea and ensuring internal circulation; the flexible sleeve is horn-shaped and corrugated.
Preferably, two sides of the small arc piece slide in the large circular ring piece, and the small arc piece and the inner wall of the inner cavity of the large circular ring piece are connected through a flexible belt.
Preferably, the outer wall of the valve body is provided with three coatings for corrosion prevention from outside to inside, the outermost layer is a corrosion-resistant layer, the secondary outer layer is an aging-resistant layer, the innermost layer is a low-temperature layer, the low-temperature layer is made of polybutadiene materials, the aging-resistant layer is made of polytetrafluoroethylene materials, and the corrosion-resistant layer is made of fluororubber materials.
Preferably, a micro turbine is arranged at the upper end of the valve body and used for supplying power to the rotation of the valve core, a heating module is arranged inside the valve core, and the heating module is also supplied with power through the turbine.
Preferably, the valve body comprises the following components in percentage by mass: c: 0.15-0.25%, Si: 3-3.5%, Mn: 2-2.5%, Nb: 0.2-0.3%, Ti: 0.17-0.22%, Co: 0.25-0.35%, Ni: 0.05-0.1%, Al: 0.1-0.15%, Zn: 0.15-0.2%, Cr: 1.2-1.8%, B: 0.005-0.008%, V: 0.05 to 0.1%, Sn: 0.015-0.025 wt%, S not more than 0.025 wt%, P not more than 0.03 wt%, and Fe for the rest.
The invention is realized in such a way that the manufacturing method of the high-strength valve for the deep sea with low temperature resistance and corrosion resistance comprises the following steps: step S1, assembling the valve body and the valve core from inside to outside and from bottom to top;
step S2, carrying out pressure and air tightness tests on the assembled valve;
step S3, painting and packaging if the valve meets the pressure and air tightness requirements; if the pressure and air tightness requirements are not met, reworking is carried out.
Preferably, the manufacturing of the valve body comprises the following steps: step one, proportioning raw materials; step two, smelting raw materials; step three, pouring the valve body; step four, heat treatment; fifthly, processing the inner surface of the valve body; and step six, drying for later use.
Preferably, the step one: preparing a raw material for manufacturing a valve body, obtaining element types in the raw material through a spectrum analyzer, and obtaining the density of each element through a density detector so as to obtain the mass percentage of each element; and adding auxiliary materials according to the mass percent of each element.
Preferably, step two: putting raw materials for manufacturing the valve body into smelting equipment to be smelted into molten steel, controlling the temperature at 1550-; slagging is carried out by using a slagging agent, and bottom blowing gas is blown into smelting equipment through a nozzle at the bottom of the furnace; stirring the molten steel; transferring the molten steel after primary smelting to a vacuum or inert gas filled container for deoxidation, degassing and desulfurization, removing impurities contained in the molten steel, and obtaining the percentage of the impurities by a spectrum analyzer and a density detector; the initial smelting is repeated until the percentage of inclusions in the molten steel has not been significantly reduced or has reached a minimum.
Preferably, the molten steel is heated to 1700-1850 ℃ in the third step, and is discharged and killed; after calming for 2-3min, pouring the molten steel into a mold to form a valve body part; the slagging agent in the third step is a low-carbon submerged arc slagging agent, and comprises the following components in percentage by weight: CaO: 68-72% of SiO2：5-10％，MgO：1-3％，Al2O3: 7-14%, Al: 4-5%, S: 0.005-0.01%; the bottom blowing gas is Ar or N2、CO2Or CH4。
Preferably, step four: putting the valve body part formed by casting into an electric furnace, heating to 870-970 ℃ at the speed of not higher than 75 ℃/h, preserving the heat for 4-5h, and cooling the furnace to room temperature; raising the temperature to 750-820 ℃ at a temperature not higher than 92 ℃/h, keeping the temperature for 3-4h, discharging, and quenching in 65-80 ℃ water to 300-375 ℃; returning the mixture to the electric furnace to raise the temperature to 385 plus 420 ℃, carrying out low-temperature tempering treatment, keeping the temperature for 5 hours, and then discharging the mixture from the furnace for air cooling; annealing treatment: heating the valve body component to 920-955 ℃, preserving the heat for 4-5h, cooling to 650-750 ℃ at the speed of 65-75 ℃/h, and taking out of the furnace for air cooling.
Preferably, step five: and degreasing and airing the inner surface of the valve body after annealing and air cooling, cleaning and draining, and coating with polyvinylidene fluoride.
Preferably, step six: and (3) putting the treated valve body part into a container at the temperature of 75-80 ℃ for drying, and preserving heat for 1-1.5 h.
Compared with the prior art, the invention has the beneficial effects that: according to the low-temperature-resistant corrosion-resistant high-strength valve for the deep sea and the manufacturing method thereof, the expansion ring and the flexible belt which can expand and contract are adopted to automatically expand and contract and adapt to the pressure under water, cracks and the like caused by heat syndrome and cold contraction are avoided, the deformation resistance effect is increased and decreased, and the valve body is cast by using a special matching ratio, so that the valve body has excellent compression strength, corrosion resistance and lower brittleness.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic cross-sectional view of a pipeline according to the present invention;
in the figure: 1. a valve body; 11. a corrosion-resistant layer; 12. an aging-resistant layer; 13. a low temperature layer; 2. a pipeline; 21. a large circular arc piece; 22. a small arc sheet; 23. a flexible band; 3. a valve core; 4. a flexible sleeve; 5. a turbine.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a low temperature resistant corrosion-resistant high strength valve for deep sea, including valve body 1, valve body 1's inside is provided with two pipelines 2 that the intercommunication advances the end and goes out the end, be provided with the valve body 3 that is used for controlling the break-make between two pipelines 2, this pipeline 2 sets up to flexible expanding structure and both ends and fixes mutually through flexible cover 4 and 1 inner wall of valve body, pipeline 2 is formed by adjacent big arc piece 21 and the little arc piece 22 annular space that pegs graft and set up, be arranged in adapting to different pressure conditions in the deep sea, guarantee inside circulation.
In this embodiment, the flexible band 23 is made for special material, have flexibility, waterproof nature, it is corrosion-resistant, characteristics such as low temperature resistant, the flexible band 23 is connected big circular arc piece 21 and small circular arc piece 22, thereby connect the side of whole pipeline 2, avoid the outflow of inside liquid, peg graft each other and be the different diameter scope of annular big circular arc piece 21 and small circular arc piece 22 can automatic adaptation, thereby the different aperture water supply of automatic adaptation passes through under the pressure of difference, avoid the condition of crackle appearing, the damage of valve has been guaranteed, avoid the condition of frequent change and maintenance, small circular arc piece 22 also has flexibility, a buckling under the different curvatures of adaptation.
The outer wall of the valve body 1 is provided with three coatings which are used for corrosion prevention from outside to inside, the outmost layer is a corrosion-resistant layer 11, the secondary outer layer is an ageing-resistant layer 12, the innermost layer is a low-temperature layer 13, the low-temperature layer 13 is made of polybutadiene materials, the ageing-resistant layer 12 is made of polytetrafluoroethylene materials, and the corrosion-resistant layer 11 is made of fluororubber materials.
Further, a micro turbine 5 is arranged at the upper end of the valve body 1 and used for supplying power to the rotation of the valve core 3; the inside of the valve cartridge 3 is provided with a heating module, and this heating module is also supplied with electricity through the turbine 5.
In the present embodiment, the turbine 5 generates electricity by using the flowing seawater and tides in the deep sea, stores the electricity in a battery inside the valve, and controls the opening of the valve body 3 and the use of a heating module inside the valve body 3 by a processor inside the valve.
Further, the flexible sheath 4 is horn-shaped as a whole and has a corrugated shape.
In this embodiment, the adaptation is carried out at the pipeline 2 both ends that flexible and loudspeaker form flexible cover 4 is to the flexible change of radial expansion, and connect pipeline 2 in the both sides of the passageway of middle case 3, guarantee that case 3 is holistic opening and closing of valve when rotating, also avoid pipeline 2 can't be fixed with 1 inner wall of valve body, form and be unsettled state, guaranteed the normal use of pipeline 2, flexible cover 4 sets up to the elasticity form, conveniently cooperates the use of pipeline 22.
Further, the valve is assembled by assembling the valve body 1 and the valve core 3 from inside to outside and from bottom to top; carrying out pressure and air tightness tests on the assembled valve; painting and packaging if the valve meets the pressure and air tightness requirements; if the pressure and air tightness requirements are not met, reworking is carried out.
The valve body 1 comprises the following components in percentage by mass: c: 0.15-0.25%, Si: 3-3.5%, Mn: 2-2.5%, Nb: 0.2-0.3%, Ti: 0.17-0.22%, Co: 0.25-0.35%, Ni: 0.05-0.1%, Al: 0.1-0.15%, Zn: 0.15-0.2%, Cr: 1.2-1.8%, B: 0.005-0.008%, V: 0.05 to 0.1%, Sn: 0.015-0.025 wt%, S not more than 0.025 wt%, P not more than 0.03 wt%, and Fe for the rest.
In the present embodiment, in the composition design, C can improve impact toughness, but since too high a carbon content easily causes defects, the mass percentage of C is selected to be 0.15 to 0.25%. Mn can increase the pearlite content and further improve the tensile strength, but segregation is easy to generate when the content is too high, the ductile-brittle transition temperature is obviously increased, and the plasticity and toughness of the alloy are reduced, so that the mass percent of Mn is controlled to be 2-2.5%. Si has the characteristic of strongly inhibiting carbide precipitation in the bainite transformation process, stabilizes and refines austenite, increases C, Mn segregation, improves the hardenability of alloy, and can fully improve the hardenability and impact toughness of a fastener. Ni and B are elements which strongly increase hardenability, and can fully improve the hardenability and the impact toughness of the fastener. A small amount of Nb can refine the grains of the alloy, reduce the overheating sensitivity and the tempering brittleness of the alloy, and improve the strength and the corrosion resistance. A trace amount of B greatly improves the hardenability of the high alloy, and each 1 part by mass of B corresponds to 300 parts by mass of Mo. The trace amount of V can impart special functions to the steel, such as improving the tensile strength and yield point. The brittleness of the alloy can be obviously reduced by adding a proper amount of Ti and Co. Therefore, the components can be used for manufacturing valves in the marine low-temperature high-pressure environment.
Further, the manufacturing method of the high-strength low-temperature-resistant corrosion-resistant valve body 1 comprises the following steps: preparing a raw material for manufacturing the valve body 1, obtaining element types in the raw material through a spectrum analyzer, and obtaining the density of each element through a density detector so as to obtain the mass percentage of each element; adding auxiliary materials according to the mass percent of each element to ensure that the mass percent of each element in the raw material for manufacturing the valve body 1 reaches the required standard; putting raw materials for manufacturing the valve body 1 into smelting equipment to be smelted into molten steel, controlling the temperature at 1550-; slagging is carried out by using a slagging agent, and bottom blowing gas is blown into smelting equipment through a nozzle at the bottom of the furnace; stirring the molten steel; transferring the molten steel after primary smelting to a vacuum or inert gas filled container for deoxidation, degassing and desulfurization, removing impurities contained in the molten steel, and obtaining the percentage of the impurities by a spectrum analyzer and a density detector; repeating the previous step until the percentage of inclusions in the molten steel is not obviously reduced or the percentage of inclusions in the molten steel is minimum; heating the molten steel to 1700 ℃ and 1850 ℃, and taking out of the furnace and calming; after calming for 2-3min, pouring the molten steel into a mold to form a valve body 1 part; putting the valve body 1 part which is cast into a furnace, heating to 870-970 ℃ at a speed of not higher than 75 ℃/h, preserving heat for 4-5h, and cooling the furnace to room temperature; raising the temperature to 750-820 ℃ at a temperature not higher than 92 ℃/h, keeping the temperature for 3-4h, discharging, and quenching in 65-80 ℃ water to 300-375 ℃; returning the mixture to the electric furnace to raise the temperature to 385 plus 420 ℃, carrying out low-temperature tempering treatment, keeping the temperature for 5 hours, and then discharging the mixture from the furnace for air cooling; heating the valve body 1 component to 920-; degreasing and airing the inner surface of the valve body 1 after annealing and air cooling, cleaning and draining, and coating with polyvinylidene fluoride; and (3) putting the processed valve body 1 component into a container at 75-80 ℃ for drying, and preserving heat for 1-1.5 h.
In the embodiment, according to the steps and the raw material proportion of the valve body 1 provided by the invention, the brittleness of the cast valve body 1 can be greatly reduced, and the strength of the valve body 1 in the ocean low-temperature environment is improved; and the corrosion resistance of the valve body 1 is obviously improved; and polyvinylidene fluoride is used for coating on the inner surface of the valve body 1, so that the valve body 1 has excellent flexibility and impact strength, and can resist frequent and complex ocean current movement in the ocean.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The utility model provides a low temperature resistant corrosion-resistant high strength valve for deep sea which characterized in that: including valve body (1), the inside of valve body (1) is provided with two pipelines (2) that the intercommunication advances the end and goes out the end, two be provided with between pipeline (2) and be used for controlling valve body (3) of break-make, this pipeline (2) set up to flexible expanding structure and both ends through flexible cover (4) with valve body (1) inner wall is fixed mutually, pipeline (2) are formed by adjacent big arc piece (21) and little arc piece (22) annular interval of pegging graft setting for different pressure condition in the adaptation deep sea guarantees inside circulation.
2. The high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 1, wherein: the two sides of the small arc piece (22) slide in the large circular ring piece (21), the small arc piece (22) and the inner wall of the inner cavity of the large arc piece (21) are connected through a flexible belt (23) to form, and the flexible sleeve (4) is horn-shaped and corrugated.
3. The high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 1, wherein: the outer wall of the valve body (1) is provided with three layers of coatings for corrosion prevention from outside to inside, the outermost layer is a corrosion-resistant layer (11), the secondary outer layer is an aging-resistant layer (12), the innermost layer is a low-temperature layer (13), the material of the low-temperature layer (13) is made of polybutadiene materials, the material of the aging-resistant layer (12) is made of polytetrafluoroethylene materials, and the material of the corrosion-resistant layer (11) is made of fluororubber materials.
4. The high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 1, wherein: the heating valve is characterized in that a miniature turbine (5) is arranged at the upper end of the valve body (1) and used for supplying power to the rotation of the valve core (3), a heating module is arranged inside the valve core (3), and the heating module is also supplied with power through the turbine.
5. The high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 1, wherein: the valve body (1) comprises the following components in percentage by mass: c: 0.15-0.25%, Si: 3-3.5%, Mn: 2-2.5%, Nb: 0.2-0.3%, Ti: 0.17-0.22%, Co: 0.25-0.35%, Ni: 0.05-0.1%, Al: 0.1-0.15%, Zn: 0.15-0.2%, Cr: 1.2-1.8%, B: 0.005-0.008%, V: 0.05 to 0.1%, Sn: 0.015-0.025 wt%, S not more than 0.025 wt%, P not more than 0.03 wt%, and Fe for the rest.
6. The method for manufacturing the high-strength valve for deep sea with low temperature resistance and corrosion resistance according to any one of claims 1 to 5, characterized in that: the method comprises the following steps: step S1, assembling the valve body (1) and the valve core (3) from inside to outside and from bottom to top;
step S2, carrying out pressure and air tightness tests on the assembled valve;
step S3, painting and packaging if the valve meets the pressure and air tightness requirements; if the pressure and air tightness requirements are not met, reworking is carried out.
Wherein the manufacture of the valve body (1) comprises the steps of: step one, proportioning raw materials; step two, smelting raw materials; step three, pouring the valve body (1); step four, heat treatment; fifthly, processing the inner surface of the valve body (1); and step six, drying for later use.
7. The method for manufacturing a high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 6, wherein: the method comprises the following steps: preparing a raw material for manufacturing the valve body (1), obtaining element types in the raw material through a spectrum analyzer, and obtaining the density of each element through a density detector so as to obtain the mass percentage of each element; adding auxiliary materials according to the mass percent of each obtained element; step two: putting raw materials for manufacturing the valve body (1) into smelting equipment to be smelted into molten steel, controlling the temperature at 1550-; slagging is carried out by using a slagging agent, and bottom blowing gas is blown into smelting equipment through a nozzle at the bottom of the furnace; stirring the molten steel; transferring the molten steel after primary smelting to a vacuum or inert gas filled container for deoxidation, degassing and desulfurization, removing impurities contained in the molten steel, and obtaining the percentage of the impurities by a spectrum analyzer and a density detector; the initial smelting is repeated until the percentage of inclusions in the molten steel has not been significantly reduced or has reached a minimum.
8. The method for manufacturing a high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 6, wherein: step three, heating the molten steel to 1700 ℃ and 1850 ℃, and discharging and calming; after calming for 2-3min, pouring the molten steel into a mold to form a valve body (1) part; the slagging agent in the third step is a low-carbon submerged arc slagging agent, and comprises the following components in percentage by weight: CaO: 68-72% of SiO2：5-10％，MgO：1-3％，Al2O3: 7-14%, Al: 4-5%, S: 0.005-0.01%; the bottom blowing gas is Ar or N2、CO2Or CH4(ii) a Step four: putting the valve body (1) part which is cast into a furnace, heating to 870-970 ℃ at a speed of not higher than 75 ℃/h, preserving heat for 4-5h, and cooling the furnace to room temperature; raising the temperature to 750-820 ℃ at a temperature not higher than 92 ℃/h, keeping the temperature for 3-4h, discharging, and quenching in 65-80 ℃ water to 300-375 ℃; returning the mixture to the electric furnace to raise the temperature to 385 plus 420 ℃, carrying out low-temperature tempering treatment, keeping the temperature for 5 hours, and then discharging the mixture from the furnace for air cooling; annealing treatment: heating the valve body (1) component to 920-.
9. The method for manufacturing a high-strength valve for deep sea, which is resistant to low temperature and corrosion, according to claim 6, wherein: step five: degreasing and airing the inner surface of the valve body (1) after annealing and air cooling, cleaning and draining, and coating with polyvinylidene fluoride; step six: and (3) putting the processed valve body (1) component into a container at the temperature of 75-80 ℃ for drying, and preserving heat for 1-1.5 h.
CN202011565317.1A 2020-12-25 2020-12-25 Low-temperature-resistant corrosion-resistant high-strength valve for deep sea and manufacturing method thereof Pending CN112921235A (en)

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KR20070076780A (en) * 2006-01-20 2007-07-25 김병주 Tube valve
CN104004972A (en) * 2014-05-19 2014-08-27 安徽金大仪器有限公司 Low-temperature-resistant and corrosion-resistant deep-sea-use high-strength valve and manufacturing method thereof
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CN110067871A (en) * 2019-05-21 2019-07-30 王晖 A kind of flexible adaptive petroleum pipeline ball valve
CN211693612U (en) * 2020-02-08 2020-10-16 泉瓦特斯阀门有限公司 Water outlet valve convenient for angle adjustment
CN211976294U (en) * 2020-01-18 2020-11-20 桐庐县伟山镁钢保温工程有限公司 Detachable anticorrosion thermal insulation valve sleeve
CN214881771U (en) * 2020-12-25 2021-11-26 张家港市鸿源机械锻造有限公司 Low-temperature-resistant and corrosion-resistant high-strength valve for deep sea

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2625676Y (en) * 2003-07-03 2004-07-14 上海艾维科阀门有限公司 Hydropower control valve
KR20070076780A (en) * 2006-01-20 2007-07-25 김병주 Tube valve
CN104006173A (en) * 2014-02-17 2014-08-27 中亚阀门有限公司 Bidirectional sealing type butterfly valve
CN104004972A (en) * 2014-05-19 2014-08-27 安徽金大仪器有限公司 Low-temperature-resistant and corrosion-resistant deep-sea-use high-strength valve and manufacturing method thereof
CN208967061U (en) * 2018-09-30 2019-06-11 东莞市智昕自动化仪表有限公司 A kind of electric butterfly valve that stability is good
CN110067871A (en) * 2019-05-21 2019-07-30 王晖 A kind of flexible adaptive petroleum pipeline ball valve
CN211976294U (en) * 2020-01-18 2020-11-20 桐庐县伟山镁钢保温工程有限公司 Detachable anticorrosion thermal insulation valve sleeve
CN211693612U (en) * 2020-02-08 2020-10-16 泉瓦特斯阀门有限公司 Water outlet valve convenient for angle adjustment
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