CN212839871U - Ultra-low temperature liquid feeding hose with longer service life - Google Patents
Ultra-low temperature liquid feeding hose with longer service life Download PDFInfo
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- CN212839871U CN212839871U CN202021536464.1U CN202021536464U CN212839871U CN 212839871 U CN212839871 U CN 212839871U CN 202021536464 U CN202021536464 U CN 202021536464U CN 212839871 U CN212839871 U CN 212839871U
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Abstract
The utility model provides a longe-lived ultra-low temperature liquid feeding hose, including the corrugated metal hose main part, the big ripple tubular metal hose of first end and the big ripple tubular metal hose of second end, the corrugated metal hose main part is located between the big ripple tubular metal hose of first end and the big ripple tubular metal hose of second end, the both ends of corrugated metal hose main part respectively with the big ripple tubular metal hose of first end and the big ripple tubular metal hose fixed connection of second end, the corrugated metal hose main part, the big ripple tubular metal hose of first end and the big ripple tubular metal hose of second end constitute the big structure in middle little both ends, the diameter at the big ripple tubular metal hose crest of first end and the diameter at the big ripple tubular metal hose crest of second end all are greater than the diameter at the big corrugated metal hose main part crest of corrugated metal hose. The utility model discloses a longer ultra-low temperature liquid feeding hose of life-span, the region of fatigue failure is easiest at both ends adopts and increases ripple quantity and degree of depth to bend more easily, reduced stress concentration, improved fatigue failure, prolonged the hose life-span.
Description
Technical Field
The utility model belongs to the technical field of the LNG filling, specifically, relate to a longer ultra-low temperature liquid feeding hose of life-span.
Background
The liquefied natural gas is formed by purifying gas field gas produced by a gas field and then liquefying the gas field gas at ultralow temperature and normal pressure, and is abbreviated as LNG in English; the gas-liquid critical temperature of LNG natural gas under normal pressure is-162 ℃, so the liquefaction temperature and the transportation temperature of the LNG natural gas are required to be kept under the severe conditions of ultralow temperature state.
The present low-temperature liquid-feeding hose is a corrugated pipe made of metal round pipe expansion pipe. In use, parts close to two ends are hardened at ultralow temperature, the liquid is often required to be bent in the liquid adding process, so that two end parts which are most frequently bent are particularly easy to fatigue failure, crack and leakage are generated, and the steel pipe is broken due to over bending in the using process. The liquid can be sprayed seriously and splashed on operators or drivers, which causes the personnel to be frozen at ultralow temperature and even causes accidents such as fire and the like, and the safety coefficient is poor. Meanwhile, the service life of the liquid adding hose is not long, so that the hose is wasted, and meanwhile, the economic loss and the greenhouse effect can be caused by gas leakage.
In addition, in the filling process of the existing liquid adding hose, the outer wall of the hose is frosted, frozen and hardened due to low-temperature media in the hose, and the bending resistance is increased, so that the bending fatigue failure is easier to occur.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a longer ultra-low temperature liquid feeding hose of life-span has solved among the prior art low temperature liquid feeding hose and at the in-process that uses, and easy sclerosis not only causes liquid feeding hose life greatly reduced to in the use, there is the liquid feeding hose easily to produce fatigue failure, causes the liquid feeding hose to leak or fracture, has the problem of very big potential safety hazard.
The technical scheme is as follows: the utility model provides a longer ultra-low temperature liquid feeding hose of life-span, including the big ripple tubular metal resonator of corrugated metal resonator main part, first end and the big ripple tubular metal resonator of second end, the corrugated metal resonator main part is located between the big ripple tubular metal resonator of first end and the big ripple tubular metal resonator of second end to the both ends of corrugated metal resonator main part respectively with the big ripple tubular metal resonator of first end and the big ripple tubular metal resonator fixed connection of second end, the big ripple tubular metal resonator of corrugated metal resonator main part, first end and the big ripple tubular metal resonator of second end constitute the big structure in middle little both ends, and the diameter of the big ripple tubular metal resonator crest of first end and the diameter of the big ripple tubular metal resonator crest of second end all are greater than the diameter of corrugated metal resonator main part crest. The utility model discloses a longer ultra-low temperature liquid feeding hose of life-span, the region of fatigue failure is easiest at both ends adopts and increases ripple quantity and degree of depth to bend more easily, reduced stress concentration, improved fatigue failure, prolonged the hose life-span.
Furthermore, the ultralow temperature liquid feeding hose with longer service life has the advantages that the diameters of all wave crests of the metal corrugated hose main body are the same, and the first end large corrugated metal hose and/or the second end large corrugated metal hose are of variable diameter structures. Through the design of reducing structure, set up to the same with corrugated metal hose main part diameter at the big corrugated metal hose of first end and the big corrugated metal hose's of second end one end to can carry out good switching between the big corrugated metal hose of first end and the big corrugated metal hose of second end and the corrugated metal hose main part.
Furthermore, in the ultra-low temperature liquid feeding hose with longer service life, the diameter of each wave peak of the first end part large corrugated metal hose is gradually increased towards the direction far away from the main body of the metal corrugated hose, and the diameter of each wave peak of the second end part large corrugated metal hose is gradually increased towards the direction far away from the main body of the metal corrugated hose. The structural design that the diameter increases gradually is adopted, and the service life of the liquid feeding hose can be prolonged.
Further, foretell life-span ultra-low temperature liquid feeding hose that is longer, the outside cover of the big ripple tubular metal resonator of first end is equipped with first ripple and separates the wet hood, first ripple separates the diameter that the diameter of wet hood trough is greater than the diameter of the big ripple tubular metal resonator crest of first end, first ripple separates to form between the inner wall of wet hood and the outer wall of the big ripple tubular metal resonator of first end and completely cuts off air cavity one.
Further, foretell ultra-low temperature liquid feeding hose that life-span is longer, the outside cover of the big ripple tubular metal resonator of second end portion is equipped with the second ripple and separates the wet hood, the diameter that the second ripple separated the wet hood trough is greater than the diameter of the big ripple tubular metal resonator crest of second end portion, the second ripple separates to form isolated air cavity two between the inner wall of wet hood and the outer wall of the big ripple tubular metal resonator of second end portion. The first end large corrugated metal hose and the second end large corrugated metal hose are kept in a frostless and ice-free state at low temperature by dry gas in the first insulating air cavity and the second insulating air cavity, so that the telescopic ductility of the first end large corrugated metal hose and the second end large corrugated metal hose is improved, and the service lives of the first end large corrugated metal hose and the second end large corrugated metal hose are prolonged.
Further, foretell ultra-low temperature liquid feeding hose that life-span is longer, the big ripple tubular metal resonator of first end is kept away from the terminal surface department of corrugated metal resonator main part and is equipped with welded joint portion one, the big ripple tubular metal resonator of second end is kept away from the terminal surface department of corrugated metal resonator main part and is equipped with welded joint portion two.
Furthermore, the ultralow temperature liquid feeding hose with longer service life is characterized in that the two ends of the first corrugated moisture-proof cover are respectively provided with a first connecting joint, and the first connecting joint is fixedly connected with the outer wall of the first end large corrugated metal hose. The first connecting joint is arranged to enable the first corrugated moisture-proof cover to form a stable connection with the first end large corrugated metal hose.
Furthermore, the ultralow temperature liquid feeding hose with longer service life is characterized in that two ends of the second corrugated moisture-isolating cover are respectively provided with a second connecting joint, and the second connecting joints are fixedly connected with the outer wall of the second end large corrugated metal hose. The second connecting joint is arranged to enable the second corrugated moisture-proof cover to form a stable connection with the second end large corrugated metal hose.
Further, the length of the metal corrugated hose body is within the range of 2M-6M.
Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: the ultra-low temperature liquid feeding hose that life-span is longer, through the region at the easiest fatigue failure in both ends, adopt and increase ripple quantity and degree of depth to make this region bend more easily, reduced stress concentration, improved fatigue failure, prolonged the hose life-span. Meanwhile, aiming at the problem of frosting and icing, a new part is added in the two end areas, and the ripple separates the moisture cover. The two ends of the cover are connected with the liquid adding hose through clamping, welding or other modes to form a dry gas cavity. The cavity may be filled with dry air or inert gas such as dry nitrogen gas. Therefore, stress corrosion caused by frosting and icing of areas with easy failure at two ends, pollution and humidity such as acid rain and the like is avoided, bending stress concentration can be effectively reduced, and the service life of the liquid feeding hose is prolonged. Therefore, the greenhouse effect and the economic loss caused by directly discharging leaked fuel gas into the air and the waste of stainless steel materials caused by frequent scrapping of hoses can be reduced. Therefore, the invention has great social significance and economic value.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of the ultra-low temperature liquid feeding hose with a longer service life of the present invention;
FIG. 2 is a schematic structural view of a second embodiment of the ultra-low temperature liquid feeding hose with a longer service life of the present invention;
fig. 3 is a schematic structural view of a third embodiment of the ultra-low temperature liquid feeding hose with a longer service life of the present invention.
In the figure: the metal corrugated hose comprises a metal corrugated hose body 1, a first end large corrugated metal hose 2, a first welding joint part 21, a second end large corrugated metal hose 3, a second welding joint part 31, a first corrugated moisture-proof cover 4, a first connecting joint 41, a second corrugated moisture-proof cover 5, a second connecting joint 51, a first isolated air cavity 6 and a second isolated air cavity 7.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example one
As shown in fig. 1, the ultra-low temperature liquid feeding hose with longer service life comprises a metal corrugated hose body 1, a first end large corrugated metal hose 2 and a second end large corrugated metal hose 3, wherein the metal corrugated hose body 1 is located between the first end large corrugated metal hose 2 and the second end large corrugated metal hose 3, two ends of the metal corrugated hose body 1 are fixedly connected with the first end large corrugated metal hose 2 and the second end large corrugated metal hose 3 respectively, the metal corrugated hose body 1, the first end large corrugated metal hose 2 and the second end large corrugated metal hose 3 form a structure with a small middle and two large ends, and the diameters of the peaks of the first end large corrugated metal hose 2 and the peaks of the second end large corrugated metal hose 3 are larger than the diameters of the peaks of the metal corrugated hose body 1. The length of the metal corrugated hose body 1 is within the range of 2M-6M.
In the above structure, the first end part large corrugated metal hose 2 and the second end part large corrugated metal hose 3 with large corrugations are added at two ends of the traditional liquid feeding hose, and the added parts of the first end part large corrugated metal hose 2 and the second end part large corrugated metal hose 3 have large expansion and contraction performance due to large corrugations.
Example two
Based on the structure of the embodiment, as shown in fig. 2, the diameters of the peaks of the metal corrugated flexible pipe main body 1 are the same, and the first end large corrugated metal flexible pipe 2 and/or the second end large corrugated metal flexible pipe 3 are both of variable diameter structures. Wherein, the diameter of each wave crest of the first end part large corrugated metal hose 2 gradually increases towards the direction far away from the metal corrugated hose body 1, and the diameter of each wave crest of the second end part large corrugated metal hose 3 gradually increases towards the direction far away from the metal corrugated hose body 1. Adopt the big ripple tubular metal resonator 2 of first end and the big ripple tubular metal resonator 3 of second end of diameter-variable structure, can enough with carry out good connection between the corrugated metal resonator main part 1, simultaneously because the big ripple tubular metal resonator 2 of first end and the big ripple tubular metal resonator 3 of second end, the size structure of sharp change between the big ripple tubular metal resonator 2 of metal resonator main part 1 and first end and the big ripple tubular metal resonator 3 of second end has been improved, the big ripple tubular metal resonator 2 of first end and the big ripple tubular metal resonator 3 of second end itself increase the structure gradually, also can prolong the life of liquid feeding hose.
EXAMPLE III
Based on the structure of the first embodiment or the second embodiment, as shown in fig. 3, the first corrugated moisture-proof cover 4 is sleeved outside the first end large corrugated metal hose 2, the diameter of the wave trough of the first corrugated moisture-proof cover 4 is larger than that of the wave crest of the first end large corrugated metal hose 2, and an insulating air cavity first 6 is formed between the inner wall of the first corrugated moisture-proof cover 4 and the outer wall of the first end large corrugated metal hose 2. The outside cover of the big ripple tubular metal resonator 3 of second end is equipped with the second ripple and separates moisture cover 5, the diameter that the second ripple separates moisture cover 5 trough is greater than the diameter of the big ripple tubular metal resonator 3 crest of second end, the isolated air cavity two 7 of formation between the inner wall that the second ripple separates moisture cover 5 and the outer wall of the big ripple tubular metal resonator 3 of second end.
In the above-mentioned structure, to the frozen problem of frosting, the both ends region has increased the first ripple of a new part and has insulated moisture cover 4 and the second ripple and insulated moisture cover 5, and the both ends of this cover are passed through modes such as clamp or welding and are connected with the liquid feeding hose, form dry gaseous cavity. The cavity may be filled with dry air or inert gas such as dry nitrogen gas. Therefore, stress corrosion caused by frosting and icing of areas with easy failure at two ends, pollution and humidity such as acid rain and the like is avoided, bending stress concentration can be effectively reduced, and the service life of the liquid feeding hose is prolonged.
In addition, a first welding joint part 21 is arranged at the end face of the first end large corrugated metal hose 2 far away from the metal corrugated hose body 1, and a second welding joint part 31 is arranged at the end face of the second end large corrugated metal hose 3 far away from the metal corrugated hose body 1.
In addition, both ends of the first corrugated moisture-proof hood 4 are provided with a first connecting joint 41, and the first connecting joint 41 is fixedly connected with the outer wall of the first end large corrugated metal hose 2. And two ends of the second corrugated moisture-isolating cover 5 are respectively provided with a second connecting joint 51, and the second connecting joints 51 are fixedly connected with the outer wall of the second end large corrugated metal hose 3.
Foretell liquid feeding hose that life-span is prolonged by a wide margin, main function and benefit:
1. the two ends of the failure area are easy to bend, so that the failure area is softer and easier to bend, the fatigue stress concentration is improved, and the service life is prolonged.
2. The two ends are volatile, a corrugated soft moisture isolation cover is added, the stress corrosion problem of pollutants such as frosting, icing, acid rain and the like is avoided, and the service life of the hose is effectively prolonged.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a longer ultra-low temperature liquid feeding hose of life-span which characterized in that: comprises a metal corrugated hose body (1), a first end large corrugated metal hose (2) and a second end large corrugated metal hose (3), the metal corrugated hose main body (1) is positioned between the first end large corrugated metal hose (2) and the second end large corrugated metal hose (3), and two ends of the metal corrugated hose main body (1) are respectively fixedly connected with the first end large corrugated metal hose (2) and the second end large corrugated metal hose (3), the metal corrugated hose body (1), the first end large corrugated metal hose (2) and the second end large corrugated metal hose (3) form a structure with a small middle and large two ends, and the diameter of the wave crest of the first end part large corrugated metal hose (2) and the diameter of the wave crest of the second end part large corrugated metal hose (3) are both larger than the diameter of the wave crest of the metal corrugated hose main body (1).
2. The ultra-low temperature charging hose with longer service life according to claim 1, characterized in that: the diameters of all wave crests of the metal corrugated hose main body (1) are the same, and the first end large corrugated metal hose (2) and/or the second end large corrugated metal hose (3) are of variable diameter structures.
3. The ultra-low temperature charging hose with longer service life according to claim 2, characterized in that: the diameters of all wave crests of the first end large corrugated metal hose (2) are gradually increased towards the direction far away from the metal corrugated hose body (1), and the diameters of all wave crests of the second end large corrugated metal hose (3) are gradually increased towards the direction far away from the metal corrugated hose body (1).
4. The ultra-low temperature charging hose with longer service life according to claim 1 or 3, characterized in that: the outside cover of the big ripple tubular metal resonator (2) of first end is equipped with first ripple and separates moisture cover (4), the diameter that the first ripple separates moisture cover (4) trough is greater than the diameter of the big ripple tubular metal resonator (2) crest of first end, first ripple separates and forms between the inner wall of moisture cover (4) and the outer wall of the big ripple tubular metal resonator (2) of first end and isolates air cavity (6).
5. The ultra-low temperature charging hose with longer service life of claim 4, characterized in that: the outside cover of the big ripple tubular metal resonator (3) of second end is equipped with the second ripple and separates moisture cover (5), the diameter that the second ripple separates moisture cover (5) trough is greater than the diameter of the big ripple tubular metal resonator (3) crest of second end, the second ripple separates and forms between the inner wall of moisture cover (5) and the outer wall of the big ripple tubular metal resonator (3) of second end and completely cuts off air cavity two (7).
6. The ultra-low temperature charging hose with longer service life according to claim 1 or 3, characterized in that: the end face, away from the corrugated metal hose body (1), of the first end portion large corrugated metal hose (2) is provided with a first welding joint portion (21), and the end face, away from the corrugated metal hose body (1), of the second end portion large corrugated metal hose (3) is provided with a second welding joint portion (31).
7. The ultra-low temperature charging hose with longer service life of claim 4, characterized in that: and two ends of the first corrugated moisture-isolating cover (4) are respectively provided with a first connecting joint (41), and the first connecting joints (41) are fixedly connected with the outer wall of the first end large corrugated metal hose (2).
8. The ultra-low temperature charging hose with longer service life of claim 5, characterized in that: and two ends of the second corrugated moisture-isolating cover (5) are respectively provided with a second connecting joint (51), and the second connecting joints (51) are fixedly connected with the outer wall of the second end large corrugated metal hose (3).
9. The ultra-low temperature charging hose with longer service life according to claim 1, characterized in that: the length of the metal corrugated hose main body (1) is within the range of 2M-6M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021536464.1U CN212839871U (en) | 2020-07-30 | 2020-07-30 | Ultra-low temperature liquid feeding hose with longer service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021536464.1U CN212839871U (en) | 2020-07-30 | 2020-07-30 | Ultra-low temperature liquid feeding hose with longer service life |
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| Publication Number | Publication Date |
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| CN212839871U true CN212839871U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021536464.1U Active CN212839871U (en) | 2020-07-30 | 2020-07-30 | Ultra-low temperature liquid feeding hose with longer service life |
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| CN (1) | CN212839871U (en) |
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- 2020-07-30 CN CN202021536464.1U patent/CN212839871U/en active Active
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