CN115574177A - Antibacterial stainless steel bent pipe - Google Patents
Antibacterial stainless steel bent pipe Download PDFInfo
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- CN115574177A CN115574177A CN202211444012.4A CN202211444012A CN115574177A CN 115574177 A CN115574177 A CN 115574177A CN 202211444012 A CN202211444012 A CN 202211444012A CN 115574177 A CN115574177 A CN 115574177A
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- stainless steel
- elbow
- copper
- pipe
- antibacterial stainless
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 108
- 239000010935 stainless steel Substances 0.000 title claims abstract description 107
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 88
- 239000010949 copper Substances 0.000 claims abstract description 110
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 89
- 229910052802 copper Inorganic materials 0.000 claims abstract description 89
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 33
- 230000000845 anti-microbial effect Effects 0.000 claims description 9
- 230000003115 biocidal effect Effects 0.000 claims description 5
- 239000004599 antimicrobial Substances 0.000 claims 2
- 239000003242 anti bacterial agent Substances 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011572 manganese Substances 0.000 description 8
- 230000035882 stress Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 239000011651 chromium Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
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- 150000002500 ions Chemical class 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
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- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 229910002549 Fe–Cu Inorganic materials 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
- 229910006540 α-FeOOH Inorganic materials 0.000 description 1
- 229910006299 γ-FeOOH Inorganic materials 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/02—Bends; Siphons adapted to make use of special securing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/001—Bends; Siphons made of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The invention belongs to the technical field of stainless steel pipes, and particularly relates to an antibacterial stainless steel bent pipe. The inner diameter of the interface part of the copper-containing antibacterial stainless steel elbow pipe body is smaller than the inner diameter of the elbow pipe of the copper-containing antibacterial stainless steel elbow pipe body, the wall thickness of the interface parts at two ends extends to the elbow pipe of the copper-containing antibacterial stainless steel elbow pipe body in a trend of gradually increasing the wall thickness, and the wall thickness formed at the elbow pipe of the copper-containing antibacterial stainless steel elbow pipe body reaches the maximum structural form so as to reduce the stress concentration phenomenon caused by water flow impact; meanwhile, the copper-containing antibacterial stainless steel elbow body is made of copper-containing austenitic stainless steel, so that the copper-containing antibacterial stainless steel elbow is higher in impact resistance than a traditional metal elbow, the corrosion resistance effect is improved, and meanwhile, the antibacterial performance of the copper-containing antibacterial stainless steel elbow can provide guarantee for the sanitary safety of a municipal water supply system.
Description
Technical Field
The invention belongs to the technical field of stainless steel pipes, and particularly relates to an antibacterial stainless steel bent pipe.
Background
The metal return bend is commonly used as the connection of domestic water transportation pipeline, and it is facing complicated acid-base environment and the corruption and the washing away of pipeline rivers in the installation environment, especially in the corner of return bend, rivers wash and easily cause stress concentration, therefore easily causes the influence to swan neck system's life, and the breeding of aquatic microorganism can threaten the sanitary system in city.
Disclosure of Invention
In view of this, the present invention provides an antibacterial stainless steel elbow, which aims to overcome the defect of reduced service life caused by stress concentration at the corner of the traditional elbow due to water flow scouring, and simultaneously solve the sanitary problems caused by corrosion of water medium of the traditional elbow to the pipeline and bacterial growth.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
an antibacterial stainless steel elbow comprises a copper-containing antibacterial stainless steel elbow body, elbow connecting pipes and pipeline pipes, wherein connecting parts at two ends of the copper-containing antibacterial stainless steel elbow body are respectively connected with the pipeline pipes through the elbow connecting pipes, the inner diameter of the connecting parts is smaller than that of the elbow of the copper-containing antibacterial stainless steel elbow body, the wall thickness of the connecting parts at the two ends extends to the elbow of the copper-containing antibacterial stainless steel elbow body along the trend that the wall thickness is gradually increased, and the structural form that the wall thickness at the elbow of the copper-containing antibacterial stainless steel elbow body reaches the maximum is formed; meanwhile, the copper-containing antibacterial stainless steel elbow body adopts copper-containing austenitic stainless steel 3.45% Cu-304L, wherein the content of copper is calculated by mass fraction.
In the invention, the inner diameter of the elbow of the copper-containing antibacterial stainless steel elbow body is larger than that of the interface part, so that the elbow is in an obtuse angle structure to reduce stress concentration, and the wall thickness of the elbow is thicker than that of other parts, thereby effectively prolonging the service life of the copper-containing antibacterial stainless steel elbow body.
Preferably, the copper-containing austenitic stainless steel comprises the following element components: by mass fraction, 17.90% of Cr, 8.81% of Ni, 3.45% of Cu, 1.48% of Mn, 0.52% of Si, 0.010% of P, 0.001% of S, 0.007% of C and the balance of Fe. The material has good corrosion resistance and antibacterial performance.
Preferably, the elbow connecting pipe includes an elbow connecting portion, a pipe connecting portion and a sealing snap ring between the elbow connecting portion and the pipe connecting portion, the elbow connecting portion is connected to the interface portion, and then extends one end of the interface portion to the position of the sealing snap ring, and the pipe connecting portion is connected to the pipe and then extends one end of the pipe to the position of the sealing snap ring.
Preferably, the connecting surface of the elbow connecting portion and the connecting surface of the connecting portion is a smooth curved surface, and the inner diameter of the elbow connecting portion is the same as the outer diameter of the connecting portion, so as to insert the connecting portion into the elbow connecting portion, and the pipe connecting portion is connected to the pipe through a thread pair. Under the structure, after the connecting part of the copper-containing antibacterial stainless steel elbow pipe body is inserted into the elbow pipe connecting part, the connecting part can still rotate freely to find the optimal working position so as to adapt to the complex working environment.
Preferably, a set of first fixing portions are symmetrically arranged on the elbow connecting portion, a second fixing portion is arranged on the connecting portion, and after the first fixing portion and the second fixing portion are fixedly connected, the copper-containing antibacterial stainless steel elbow body is connected with the elbow connecting pipe.
Preferably, the first fixing portion is located at an end of the elbow connecting portion, and a fixing hole is formed in the first fixing portion; the second fixing part is disc-shaped, an arc-shaped groove is formed in the disc-shaped second fixing part, and after the groove is matched with the fixing hole, the copper-containing antibacterial stainless steel elbow body is connected with the elbow connecting pipe through a fastener. In the present invention, the first fixing portion may be designed as a protruding fixing block, the second fixing portion may be designed as a disk-shaped fixing disk, and two grooves facilitating movement of the fastening member are symmetrically distributed on the fixing disk.
Furthermore, the inner diameter of the sealing snap ring, the inner diameter of the connecting part and the inner diameter of the pipeline pipe are kept the same, and the sealing performance among the pipelines is ensured to the maximum extent.
Preferably, the left side and the right side of the sealing snap ring are respectively provided with a first rubber sealing ring and a second rubber sealing ring, the first rubber sealing ring is in contact with the end part of the connecting port part, and the second rubber sealing ring is in contact with the end part of the pipeline pipe. In the structure, the rubber sealing ring generates elastic deformation through the pressure of parts on two sides to fill the gap generated at the joint, thereby increasing the sealing performance of the joint of the elbow connecting pipe, the copper-containing antibacterial stainless steel elbow body and the pipeline pipe and reducing the water leakage phenomenon.
Further, the elbow connection pipe also uses copper-containing austenitic stainless steel 3.45% Cu-304L, wherein the copper content is calculated by mass fraction.
The invention has the beneficial effects that:
1. the invention adopts the antibacterial stainless steel material, has higher impact resistance strength than the traditional metal elbow, improves the corrosion resistance effect, and simultaneously can provide guarantee for the sanitary safety of the urban water supply system due to the antibacterial property.
2. The structure of the traditional elbow is improved, and the design that the diameter of the elbow is larger than that of the interface part enables the right-angle structure inside the traditional elbow to be optimized to be an obtuse-angle structure, reduces stress concentration generated when water flows pass through, and prolongs the service life of the elbow.
3. The invention can ensure the tight connection of the antibacterial stainless steel elbow pipe during installation and can freely rotate at the same time by utilizing the smooth curved surface of the connecting part of the elbow pipe and the interface part, thereby facilitating the installation and finishing the work under various working environments.
4. According to the invention, through the arrangement of the rubber sealing ring, the gap generated when the copper-containing antibacterial stainless steel elbow body and the connecting pipe touch the clamping ring sealed in the middle of the connecting piece can be filled through the elastic deformation of the rubber sealing ring, so that the sealing performance of the antibacterial stainless steel elbow and the connecting pipe at the connecting part can be improved, and the water leakage condition is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic perspective view of an antibacterial stainless steel elbow of the present invention;
FIG. 2 is a schematic perspective view of the copper-containing antimicrobial stainless steel elbow body according to the present invention;
FIG. 3 is a schematic perspective view of a connection tube of an elbow according to the present invention;
FIG. 4 is a front view of the structure shown in FIG. 1;
FIG. 5 is a schematic cross-sectional view of the structure of FIG. 4;
fig. 6 is an exploded view of the structure shown in fig. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Because traditional metal return bend faces the corruption and the washing away of pipeline rivers, easily form stress concentration in the corner of return bend, reduce swan neck system's life, the rivers in the pipeline are very easily bred the threat that the bacterium formed to urban sanitation system simultaneously.
Under the condition, new antibacterial stainless steel materials are produced. The antibacterial stainless steel is a novel stainless steel material which is prepared by adding a proper amount of copper element with an antibacterial function into the existing stainless steel and assisting a heat treatment process capable of promoting the uniform precipitation of an antibacterial copper-rich phase, and releases copper ions in a trace manner in the process of contacting with the environment so as to realize the antibacterial function. The material has the functions of structure and antibiosis: besides the characteristics of stainless steel such as high plasticity, high toughness and corrosion resistance, the stainless steel also has good processability and mechanical properties and broad antibacterial property.
Therefore, the inventor of this application utilizes this kind of neotype antibiotic stainless steel to replace traditional metal return bend material to solve the problem that rivers bacterium breeies, simultaneously, the inventor utilizes the design that return bend corner diameter is greater than return bend kneck diameter, makes the inner structure of metal return bend change into obtuse angle structure by traditional right angle structure, reduces the stress concentration phenomenon that rivers erode and bring with this, thereby promotes the life of return bend.
Since the present invention uses the antibacterial stainless steel, the antibacterial stainless steel is specifically selected from the group consisting of copper-containing austenitic stainless steel 3.45% Cu-304L. Wherein, each element component is as follows by mass fraction: 17.90% of Cr, 8.81% of Ni, 3.45% of Cu, 1.48% of Mn, 0.52% of Si, 0.010% of P, 0.001% of S, 0.007% of C and the balance of Fe.
Chromium Cr is a basic alloy element of stainless steel, cr is a self-passivating metal which is easy to oxidize, and Cr in the stainless steel adsorbs oxygen in the environment to form a layer of dense oxide on the surface of the stainless steel so as to prevent internal oxidation. The nickel Ni can improve the strength of the stainless steel and keep good plasticity and toughness, and the Ni has higher corrosion resistance to acid and alkali and has very excellent heat resistance and corrosion resistance.
The addition of copper Cu to stainless steel results in cracking of the steel during hot working, and hot working properties tend to be unstable as the copper content increases. Research shows that after Mn, S and other elements are added into copper-containing steel, copper can be precipitated on MnS inclusion, so that the enrichment of copper in grain boundary is reduced, and the damage of copper to the hot brittleness of steel is reduced. Therefore, the invention adds manganese Mn and sulfur S in the stainless steel, and the proper amount of manganese Mn can form MnS compound with the residual sulfur S in the steel to reduce the generation of FeS and reduce the hot brittleness phenomenon caused by the hot strength of the steel.
The excellent properties resulting from the use of the copper-containing austenitic stainless steel of the present invention of 3.45% Cu-304L and the reason for selecting the copper-containing austenitic stainless steel of 3.45% Cu-304L will be described in detail below.
Corrosion resistance: electrochemical experiments show that the corrosion resistance of the stainless steel passivation film inner layer can be improved by adding Cu into the stainless steel, and the existence of Cu is pointed out in documents to promote gamma-Fe of a rust layer 2 O 3 the/gamma-FeOOH is converted into alpha-FeOOH, so that the formation of a protective passivation layer is promoted, and therefore, the copper-containing antibacterial stainless steel has the advantage of uniform corrosion resistance compared with the common stainless steel. However, the pitting corrosion resistance of the copper-containing austenitic stainless steel is reduced along with the increase of the Cu content, and researches show that after the aging treatment, the copper-containing austenitic stainless steel is subjected to short-time solid solution treatment, the size of a Cu-rich phase is reduced, the destructiveness of the Cu-rich phase on a passive film is reduced, S in the stainless steel is easy to combine with Cu, the occurrence of MnS is reduced, and the pitting corrosion resistance of the copper-containing austenitic stainless steel is improved along with the increase of the Cu content. In conclusion, the copper-containing antibacterial stainless steel has better corrosion resistance than common stainless steel, and can be used in various complex environmentsAnd (5) operating.
Antibacterial property: in the immersion test of the aged stainless steel sample containing 3.45% copper in 1% NaCl solution, the amount of Cu ion elution was almost linear, and the calculated amount of Cu ion elution per unit area per day was close to 0.1ng/cm 2 . And the antibacterial effect on staphylococcus aureus, escherichia coli and other bacteria is very considerable through the verification of an antibacterial experiment. Further tests have demonstrated that copper-containing antimicrobial stainless steels inhibit the formation and propagation of dominant bacteria among the bacteria breeding in nutrient rich environments, thus effectively controlling microbial contamination and spread. Meanwhile, the Cu-containing antibacterial stainless steel can inhibit the activity of planktonic microorganisms to a certain degree, reduce the possibility of the contact of microorganisms and metal equipment in the surrounding environment, and further reduce the phenomenon that metal corrosion is aggravated by microbial secretions.
Mechanical properties: for tensile mechanical properties, the softening effect caused by the stacking fault energy and the solid solution strengthening effect caused by the addition of Cu are mutually counteracted, and the influence of the addition of Cu on the mechanical properties of the Cu-containing antibacterial stainless steel subjected to solid solution treatment is very little. And the precipitation strengthening of the Cu-rich phase promotes the improvement of the mechanical property of the stainless steel, so that the hardness of the stainless steel is obviously improved.
The processing performance is as follows: the solubility of copper in the austenite region is maximized from the Fe-Cu binary phase diagram. With the increase of the Cu content, the increase of time and temperature can cause the oxidation corrosion degree of a grain boundary and an interface to be deepened during the hot processing of the copper-containing antibacterial stainless steel, and the more serious the hot brittleness is, the narrower the hot processing window of the copper-containing antibacterial stainless steel is. Therefore, on the premise of ensuring the antibacterial property of the stainless steel, the content of Cu plays a crucial role in the processing performance of the copper-containing antibacterial stainless steel. In conclusion, it is verified that the antibacterial stainless steel is in the optimal processing range by the copper content of 3.45%, so that the processing cost can be reduced to the maximum extent while the antibacterial effect is ensured.
Therefore, for the reasons mentioned above, the present invention selects 3.45% of the copper-containing antibacterial stainless steel as the bent tube body of the copper-containing antibacterial stainless steel in the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, an antibacterial stainless steel elbow comprises a copper-containing antibacterial stainless steel elbow body 1, an elbow connection pipe 4 and a pipeline pipe 5, wherein two ends of the copper-containing antibacterial stainless steel elbow body 1 are provided with connection parts 12, and each connection part 12 is connected with the pipeline pipe 5 through the elbow connection pipe 4. In this example, the pipe line 5 is a national standard straight metal pipe.
As shown in FIG. 2, the inner diameter of the connecting portion 12 is significantly smaller than the inner diameter of the bent tube of the copper-containing antimicrobial stainless steel bent tube body 1, and the wall thickness of the connecting portion 12 at the two ends is gradually increased toward the bent tube of the copper-containing antimicrobial stainless steel bent tube body 1, so as to form a structure form that the wall thickness of the bent tube of the copper-containing antimicrobial stainless steel bent tube body 1 is maximized. The structure changes the right-angle structure in the traditional elbow into the obtuse-angle structure, so that the stress concentration phenomenon caused by water flow scouring is reduced, and the service life of the elbow is prolonged.
Meanwhile, the copper-containing antibacterial stainless steel elbow body 1 adopts 3.45% Cu-304L of copper-containing austenitic stainless steel, wherein the copper-containing austenitic stainless steel comprises the following element components: by mass fraction, 17.90% of Cr, 8.81% of Ni, 3.45% of Cu, 1.48% of Mn, 0.52% of Si, 0.010% of P, 0.001% of S, 0.007% of C and the balance of Fe. The material has good corrosion resistance and antibacterial performance.
As shown in fig. 3, the elbow connection pipe 4 includes an elbow connection portion 42, a pipe connection portion 44, and a seal snap ring 43 interposed between the elbow connection portion 42 and the pipe connection portion 44.
After the elbow connecting portion 42 is fitted to the connecting portion 12, the end of the connecting portion 12 is inserted into the elbow connecting portion 42 and extends into the position of the sealing snap ring 43. In this matching process, the inner diameter of the elbow connecting portion 42 is required to be the same as the outer diameter of the interface portion 12, and the connecting surface between the elbow connecting portion 42 and the interface portion 12 is designed to be a smooth curved surface.
The design is a smooth curved surface, so that the connecting part 12 of the copper-containing antibacterial stainless steel elbow body 1 can freely rotate to find the optimal working position while ensuring tight connection when being installed, and the copper-containing antibacterial stainless steel elbow can be conveniently installed and can complete work under various working environments.
After the pipe connecting portion 44 is connected to the pipe 5 by the screw pair, one end of the pipe 5 is inserted into the pipe connecting portion 44 and is positioned at the position of the seal snap ring 43.
In this embodiment, the inner diameter of the seal retainer ring 43, the inner diameter of the joint portion 12, and the inner diameter of the pipe 5 are kept the same, so that the sealability between pipes can be secured to the maximum extent and the stress concentration phenomenon caused by the water flow process can be reduced.
In addition, on the basis of the elbow connecting pipe 4 disclosed above, a set of first fixing portions symmetrically arranged is further provided on the elbow connecting portion 42, and further, the first fixing portions may be designed as protruding fixing blocks 41, and the fixing blocks 41 are designed at the end portions of the elbow connecting portion 42, and fixing holes for fastening members to pass through are provided on the fixing blocks 41.
Meanwhile, as shown in fig. 1, 3 and 4, the interface portion 12 may be provided with a second fixing portion, which may be further configured as a disk-shaped fixed disk 11, and two arc-shaped grooves for facilitating movement of the fastening members may be formed in the disk-shaped fixed disk 11. In this example, the fastening member is a limit bolt 2, and the arc-shaped groove can also be called a bolt moving groove.
After the circular arc-shaped groove is matched with the fixing hole, the copper-containing antibacterial stainless steel elbow pipe body 1 and the elbow pipe connecting pipe 4 are connected and fixedly connected into a whole by using the limiting bolt 2.
Specifically, please refer to fig. 5 and 6 for the connection and disconnection between the copper-containing antibacterial stainless steel elbow body 1 and the elbow connection pipe 4. The copper-containing antibacterial stainless steel elbow pipe body 1 is provided with a fixed disc 11, the fixed disc 11 is provided with a bolt moving groove, and the groove width of the bolt moving groove is slightly larger than the major diameter of a screw rod of the limiting bolt 2. The two sides of the outer wall of the elbow connecting part 42 are provided with fixing blocks 41 which are positioned on the same straight line with the circle center of the elbow connecting pipe 4, the fixing blocks 41 are provided with fixing holes, and the hole diameter of the fixing holes is slightly larger than the large diameter of the screw rod of the limiting bolt 2.
After the connecting part 12 of the copper-containing antibacterial stainless steel elbow body 1 is inserted into the elbow connecting part 42, the limiting bolt 2 is connected with the nut 3 in a threaded manner after sequentially passing through the holes on the fixed disc 11 and the fixed block 41, and the nut 3 is screwed up to complete the connection of the copper-containing antibacterial stainless steel elbow body 1 and the elbow connecting pipe 4. In this way, the nut 3 is rotated to release the threaded connection with the limit bolt 2, and then the limit bolt 2 is pulled out from the fixing hole of the fixing block 41 and the groove of the fixing plate 11, so that the fixing block 41 and the fixing plate 11 can be separated, and the connection between the copper-containing antibacterial stainless steel elbow body 1 and the elbow connection pipe 4 can be released.
In addition, the fixed disk 11 arranged on the copper-containing antibacterial stainless steel elbow body 1 is provided with a bolt moving groove, and the outer wall of the connecting part 12 and the inner wall of the elbow connecting part 42 are both smooth curved surfaces, so that after the connecting part 12 is inserted into the elbow connecting part 42, a worker can hold the copper-containing antibacterial stainless steel elbow body 1 to rotate in the elbow connecting pipe 4 to find an optimal working position, and can still use the limit bolt 2 to be in threaded connection with the nut 3 after the optimal position is reached so as to ensure the connection tightness; meanwhile, the connection mode can also provide a mutual acting force for the copper-containing antibacterial stainless steel elbow body 1 and the elbow connecting pipe 4, so that the copper-containing antibacterial stainless steel elbow body and the elbow connecting pipe are mutually extruded to increase the connection tightness, and the water leakage phenomenon is reduced.
Referring to fig. 5-6, a first rubber sealing ring 6 is disposed at the connection position between the connecting portion 12 of the cu-containing anti-bacterial stainless steel elbow body 1 and the elbow connecting portion 42, and the first rubber sealing ring 6 abuts against a sealing snap ring 43 disposed at the middle portion of the elbow connecting pipe 4, so that the first rubber sealing ring 6 can generate a certain elastic deformation to fill up a gap between the cu-containing anti-bacterial stainless steel elbow body 1 and the elbow connecting pipe 4 when the connecting portion 12 applies pressure to the first rubber sealing ring 6 to press the sealing snap ring 43 of the elbow connecting pipe 4, and the elastic force of the first rubber sealing ring 6 counteracts at two ends to make the threaded connection between the limiting bolt 2 and the nut 3 firmer, thereby playing a role of an elastic gasket, similarly, the second rubber sealing ring 7 connects the pipeline connecting portion 44 with the pipeline pipe 5, and these roles all can improve the tightness between the elbow connecting pipe 4 and the cu-containing anti-bacterial stainless steel elbow body 1 and the pipeline 5, thereby avoiding the problem of water leakage.
In the present invention, in addition to the copper-containing austenitic stainless steel for the elbow body 1 of the copper-containing antibacterial stainless steel, 3.45% Cu-304L of copper-containing austenitic stainless steel is used for the elbow connection pipe 4, wherein the content of copper is in mass fraction. This will improve the antibacterial effect of the pipeline to a greater extent.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an antibiotic stainless steel return bend, includes copper-containing antibiotic stainless steel return bend body, return bend connecting pipe and pipeline pipe, the interface part at copper-containing antibiotic stainless steel return bend body both ends respectively through its return bend connecting pipe with the pipeline pipe links to each other its characterized in that: the inner diameter of the connecting part is smaller than the inner diameter of the bent pipe of the copper-containing antibacterial stainless steel bent pipe body, the wall thickness of the connecting parts at the two ends extends to the bent pipe of the copper-containing antibacterial stainless steel bent pipe body along the trend that the wall thickness is gradually increased, and the structural form that the wall thickness of the bent pipe of the copper-containing antibacterial stainless steel bent pipe body reaches the maximum is formed; meanwhile, the copper-containing antibacterial stainless steel elbow body adopts copper-containing austenitic stainless steel 3.45% Cu-304L, wherein the content of copper is calculated by mass fraction.
2. The antibacterial stainless steel elbow according to claim 1, wherein the copper-containing austenitic stainless steel comprises the following specific elements: by mass fraction, 17.90% of Cr, 8.81% of Ni, 3.45% of Cu, 1.48% of Mn, 0.52% of Si, 0.010% of P, 0.001% of S, 0.007% of C and the balance of Fe.
3. The antimicrobial stainless steel elbow according to claim 2, wherein the elbow connection pipe comprises an elbow connection portion, a conduit pipe connection portion and a sealing snap ring interposed between the elbow connection portion and the conduit pipe connection portion, wherein the elbow connection portion is connected to the interface portion and extends one end of the interface portion to a position of the sealing snap ring, and the conduit pipe connection portion is connected to the conduit pipe and extends one end of the conduit pipe to a position of the sealing snap ring.
4. An antibacterial stainless steel elbow according to claim 3, characterized in that the connecting surface of the elbow connecting portion and the interface portion is a smooth curved surface, and the inner diameter of the elbow connecting portion is the same as the outer diameter of the interface portion for inserting the interface portion into the elbow connecting portion, and the pipe connecting portion is connected to the pipe through a thread pair.
5. The antibacterial stainless steel elbow according to claim 4, wherein a set of first fixing portions are symmetrically arranged on the elbow connecting portion, a second fixing portion is arranged on the connecting portion, and after the first fixing portions and the second fixing portions are fixedly connected, the copper-containing antibacterial stainless steel elbow body is connected with the elbow connecting pipe.
6. The antibacterial stainless steel elbow pipe according to claim 5, wherein the first fixing portion is located at an end of the elbow pipe connecting portion, and a fixing hole is formed in the first fixing portion; the second fixing part is disc-shaped, an arc-shaped groove is formed in the disc-shaped second fixing part, and after the groove is matched with the fixing hole, the copper-containing antibacterial stainless steel elbow body is connected with the elbow connecting pipe through a fastener.
7. An antimicrobial stainless steel elbow, according to claim 6, wherein the inside diameter of the sealing collar, the inside diameter of the interface portion and the inside diameter of the tubing remain the same.
8. The antimicrobial stainless steel elbow, according to claim 7, wherein a first rubber sealing ring and a second rubber sealing ring are respectively disposed on the left and right sides of the sealing clasp, and the first rubber sealing ring contacts with the end portion of the connecting port portion, and the second rubber sealing ring contacts with the end portion of the pipe.
9. The anti-microbial stainless steel elbow according to claim 2, wherein the elbow connection pipe is also made of copper-containing austenitic stainless steel 3.45% Cu-304L, wherein the content of copper is calculated by mass fraction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211444012.4A CN115574177A (en) | 2022-11-18 | 2022-11-18 | Antibacterial stainless steel bent pipe |
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| CN202211444012.4A CN115574177A (en) | 2022-11-18 | 2022-11-18 | Antibacterial stainless steel bent pipe |
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| CN115574177A true CN115574177A (en) | 2023-01-06 |
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| CN202211444012.4A Pending CN115574177A (en) | 2022-11-18 | 2022-11-18 | Antibacterial stainless steel bent pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816886A (en) * | 2023-02-22 | 2023-03-21 | 安徽中飞管道科技有限公司 | Antibacterial water pipe with self-cleaning function and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1099744A (en) * | 1965-02-13 | 1968-01-17 | Brueder Mannesmann G M B H | Adjustable sealing device, particularly for spigot and socket joints |
| CN1277664A (en) * | 1998-09-21 | 2000-12-20 | 东林产业株式会社 | Anti-abrasion pipe fittings for high-speed particle-laden flow |
| CN205859463U (en) * | 2016-08-16 | 2017-01-04 | 浙江万盾制冷股份有限公司 | A kind of reducing bend pipe fitting |
| CN109182903A (en) * | 2018-09-20 | 2019-01-11 | 西安华杰管道有限公司 | The preparation method of thin-walled anti-bacteria stainless steel pipe and anti-bacteria stainless steel |
| CN210034732U (en) * | 2019-04-28 | 2020-02-07 | 中国电建集团山东电力建设有限公司 | Generating set pulverized coal system |
| CN111043432A (en) * | 2019-12-31 | 2020-04-21 | 马鞍山市海天重工科技发展有限公司 | Enhancement type integrated wear-resistant elbow, conveying pipeline and concrete pump truck |
| CN213629128U (en) * | 2020-09-09 | 2021-07-06 | 安徽纵横泵阀制造有限公司 | Convenient oblique cone formula gate valve of overhauing |
| CN216242786U (en) * | 2021-09-26 | 2022-04-08 | 江苏常宝滔邦石油管件有限公司 | Corrosion-resistant petroleum pipeline joint |
| CN216666856U (en) * | 2022-01-04 | 2022-06-03 | 百鸿国际机械(上海)有限公司 | Easily weld butt welding and connect elbow |
-
2022
- 2022-11-18 CN CN202211444012.4A patent/CN115574177A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1099744A (en) * | 1965-02-13 | 1968-01-17 | Brueder Mannesmann G M B H | Adjustable sealing device, particularly for spigot and socket joints |
| CN1277664A (en) * | 1998-09-21 | 2000-12-20 | 东林产业株式会社 | Anti-abrasion pipe fittings for high-speed particle-laden flow |
| CN205859463U (en) * | 2016-08-16 | 2017-01-04 | 浙江万盾制冷股份有限公司 | A kind of reducing bend pipe fitting |
| CN109182903A (en) * | 2018-09-20 | 2019-01-11 | 西安华杰管道有限公司 | The preparation method of thin-walled anti-bacteria stainless steel pipe and anti-bacteria stainless steel |
| CN210034732U (en) * | 2019-04-28 | 2020-02-07 | 中国电建集团山东电力建设有限公司 | Generating set pulverized coal system |
| CN111043432A (en) * | 2019-12-31 | 2020-04-21 | 马鞍山市海天重工科技发展有限公司 | Enhancement type integrated wear-resistant elbow, conveying pipeline and concrete pump truck |
| CN213629128U (en) * | 2020-09-09 | 2021-07-06 | 安徽纵横泵阀制造有限公司 | Convenient oblique cone formula gate valve of overhauing |
| CN216242786U (en) * | 2021-09-26 | 2022-04-08 | 江苏常宝滔邦石油管件有限公司 | Corrosion-resistant petroleum pipeline joint |
| CN216666856U (en) * | 2022-01-04 | 2022-06-03 | 百鸿国际机械(上海)有限公司 | Easily weld butt welding and connect elbow |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816886A (en) * | 2023-02-22 | 2023-03-21 | 安徽中飞管道科技有限公司 | Antibacterial water pipe with self-cleaning function and preparation method thereof |
| CN115816886B (en) * | 2023-02-22 | 2023-05-23 | 安徽中飞管道科技有限公司 | Antibacterial water pipe with self-cleaning function and preparation method thereof |
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