Invention content
In view of the foregoing deficiencies of prior art, be to provide one kind can be effective for the technical problem to be solved in the present inventionStress is absorbed, thermal expansion curve can be released, a kind of high-pressure gas double-wall pipe of service life length, to overcome the prior artDrawbacks described above.
In order to solve the above technical problem, the present invention provides a kind of high-pressure gas double-wall pipe, including outer tube and the outer tubeThe inner tube of concentric setting, the outer tube and inner tube are welded by multiple pipeline sections；
On the outer tube, one outer pipe bend is set as compensating part every a distance；
In annular space between the outer tube and inner tube, elastic support is provided with, said inner tube passes through elastic supportIt is supported on the inner wall of outer tube；
On the outer tube, it is additionally provided with the fixing bracket for fixing inner tube；
A look cock is provided on the outer pipe bend.
Preferably, the elastic support includes two circumferentially symmetrically arranged rack bodies；Described rack body one endFor fixed part, the other end is the support portion of arc-shaped, and the support portion is resiliently supported on the inner wall of the outer tube, two stentsThe fixed part of ontology is clamped on the outer wall of said inner tube, and is clamped by fastener.
The fixed part is in tabular, and the middle part of fixed part is equipped with the arc groove to fit with the outer wall of said inner tube.
Self-lubricating liner plate, the inner wall phase that the support portion passes through self-lubricating liner plate and outer tube are further fixed on the support portionContact.
Preferably, the fixing bracket includes three-way connection, bracket and bottom bracket；The three-way connection is included along axisFirst interface, second interface and the third interface perpendicular to axis of setting, said inner tube along axis pass through first interface andSecond interface, the bracket and bottom bracket clamp inner tube from upper and lower both sides respectively and are fixed on the inner wall of third interface, instituteIt states first interface and second interface is connected to each other with outer tube, the third interface is equipped with seal cover board.
Preferably, the bottom bracket include two parallel supporting legs, be connected to the arc-shaped supporting plate of two supporting legs upper end withAnd it is vertically connected at the bottom plate of two supporting legs lower end, the arc-shaped supporting plate is in contact with the outer wall of inner tube, and the bottom plate is fixedOn the inner wall of third interface.
Preferably, the bracket is inverted U shape, and the upper end is in contact for arc sections and with the outer wall of inner tube, and lower end is setThere are two sections of screw rods, two sections of screw rods pass through the through-hole on bottom bracket bottom plate, and by nut check.
Preferably, the end face of the look cock and the outer pipe bend is set in 45 ° of angles.
Preferably, the look cock, the fixing bracket and said inner tube and the material identical of the outer tube.
Preferably, the weld seam on the weld seam and inner tube on the outer tube mutually staggers.
As described above, a kind of high-pressure gas double-wall pipe of the present invention, has the advantages that：
The high-pressure gas double-wall pipe inner tube of the present invention can meet pressure and be up to tens MPa, temperature down to subzero tens degreeThe design requirement of low-frequency vibration is chronically at double-wall pipe during vessel motion, the high pressure double-wall pipe using the present invention can meet shipGrade society is perfectly suitable for real ship and installs and uses to the safety requirements of high-pressure gas engine gas service.The present invention is logicalWind performance is good, can effectively absorb stress, can be released effectively thermal expansion curve, can effectively absorb vibration, and service life is long.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanationContent disclosed by book understands other advantages and effect of the present invention easily.
It please refers to Fig.1 to Fig.3.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only toCoordinate the revealed content of specification, so that those skilled in the art understands and reads, being not limited to the present invention can be realThe qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or sizeIt is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed skillArt content is obtained in the range of covering.Meanwhile in this specification it is cited as " on ", " under ", "left", "right", " centre " andThe term of " one " etc. is merely convenient to understanding rather than to limit the enforceable range of the present invention for narration, relativenessIt is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, a kind of high-pressure gas double-wall pipe, the inner tube including outer tube 100, with outer coaxial tube heart setting200, the outer tube 100 and inner tube 200 are welded by multiple pipeline sections.The concentric arrangement of the outer tube 100, inner tube 200,To meet concentricity requirement, the annular space between middle external tube 100, inner tube 200 when butt welding is connected between follow-up pipeline sectionGreatly, performance of ventilating is good, and realizes ventilation in real time, it can be ensured that combustion gas will not be leaked in watercraft engine room in steam line, willThe possibility control of gas explosion is zero.
On the outer tube 100, an outer pipe bend 300 is set to be used as compensating part every a distance；The outer tube is curvedFirst 300 avoid stress concentration, so that thermal expansion curve is released.
In annular space between the outer tube 100 and inner tube 200, it is provided with elastic support 400, said inner tube 200It is supported on by elastic support 400 on the inner wall of outer tube 100.As shown in Fig. 2, the elastic support 400 includes two circumferentiallySymmetrically arranged rack body 410；The rack body 410 is made of stainless steel band through mold clod wash, and one end is fixed part411, the other end is the support portion 412 of arc-shaped, and the support portion 412 is resiliently supported on the inner wall of the outer tube 100.It is describedFixed part 411 is in tabular, and the middle part of fixed part 411 is equipped with the arc groove 411a to fit with the outer wall of said inner tube 200；TwoThe fixed part 411 of a rack body 410 is clamped on the outer wall of said inner tube 200, and is passed through fastener 420 and clamped.The branchSelf-lubricating liner plate 430 is further fixed on support part 412, the support portion 412 passes through self-lubricating liner plate 430 and the inner wall of outer tube 100It is in contact.Because the flow direction along straight pipe fluid before outer pipe bend 300 is thermal expansion curve direction, elastic support 400Arrangement plays damping action；The rack body 410 is made of stainless steel band through mold clod wash, remains with sufficiently high shearing resistanceIntensity and hardness, and ensure have certain elasticity, so as to effectively absorb high-pressure gas double-wall pipe because of the temperature difference, high pressure, shakeHuge stress and thermal expansion curve caused by dynamic, so as to which ship air supply system long-term safety be enable to run.
On the outer tube 100, it is additionally provided with the fixing bracket 500 for fixing inner tube 200.It is as shown in figure 3, described solidFixed rack 500 includes three-way connection 510, bracket 520, bottom bracket 530；The three-way connection 510 includes what is set along axisFirst interface, second interface and the third interface perpendicular to axis, said inner tube 200 pass through first interface and the along axisTwo interfaces, the bracket 520 and bottom bracket 530 clamp inner tube 200 from upper and lower both sides respectively and are fixed in third interfaceOn wall, the first interface and second interface are connected to each other with outer tube 100, and the third interface is equipped with seal cover board 540.InstituteBottom bracket 530 is stated to include two parallel supporting legs, be connected to the arc-shaped supporting plate of two supporting legs upper end and be vertically connected at twoThe bottom plate of supporting leg lower end, the arc-shaped supporting plate are in contact with the outer wall of inner tube, and the bottom plate is fixed on the interior of third interfaceOn wall.The bracket 520 is inverted U shape, and the upper end is in contact for arc sections and with the outer wall of inner tube 200, and lower end is equipped with twoSection screw rod, two sections of screw rods pass through the through-hole on the bottom plate of bottom bracket 530, and are locked by nut 550.
The first interface of three-way connection 510, second interface are welded on one with respective adjacent outer tube using butt weld technologies for steelIt rises, the top of three-way connection 510 is made to become a part for outer tube 100, so as to which the fixing bracket 500 is welded on Ship StructureOn, fixed function is played, is mainly used for arriving thermal expansion curve control into the limit rebound offset distance (limit no more than elastic support 400It springs back offset distance and is carrying out 10 for elastic support7It remains to spring back to original position after secondary CYCLIC LOADING or springs back within a certain error rangePeak swing), fixed inner tube 200, outer tube 100 can be played the role of in the case where not damaging inner tube 200, outer tube 100,So as to make inner tube 200, outer tube 100 easy to assembly, and security performance is high, service life is long.
As shown in Figure 1, a look cock 600 is respectively welded on the outer pipe bend 300.The look cock 600 is ledWhen being used for the welding of outer tube 100, the Forming Quality as endoscopy outer tube 100, the weld joint on inner side of outer pipe bend 300.ForConvenient for observation, the end face of the look cock 600 and the outer pipe bend 300 is set in 45 ° of angles.The look cock600th, the fixing bracket 500 and said inner tube 200 and the material identical or similar of the outer tube 100, to avoid assemblingIt deforms upon in the process.And the weld seam on the outer tube 100 is mutually staggered with the weld seam in inner tube 200, in order to construct.
The manufacturing process of the high-pressure gas double-wall pipe of the present invention is as follows：
First according to classification society rule calculate design pressure, at a temperature of inner and outer pipes caliber, wall thickness and material, Ran HouxuanTake corresponding inner and outer pipes production tube.
Outer tube 100 is provided, formulation length is cut into according to drawing size, groove is stayed to meet welding requirements；Inner tube is provided200, using bending machine by 200 corner clod wash of inner tube into specified angle.
Elastic support 400：The making of rack body 410 first provides certain thickness stainless steel band, uses plate shearing machine firstCut into certain width, then remove burr, chamfering, confirm stainless steel band impulse- free robustness and it is bright and clean after suppressed again by mold clod washInto rack body 410 as shown in Figure 2, it is equal to the internal diameter of the inner wall of arc groove 411a that the outer wall with inner tube 200 is bonded interiorThe outer diameter of pipe 200, and the both sides of the arc groove 411a on fixed part 411 process 2 techniques of installation fastener 420Hole；In addition, at least two bolt fitting holes are processed on support portion 412, to be subsequently used for consolidating self-lubricating liner plate 430It is fixed.The making of self-lubricating liner plate 430 provides PEEK-HPV plates, and the width of PEEK-HPV plates is made to be more than the width of rack body 410Degree, with milling machine mill out with 410 matched groove of rack body, make depth of groove approximate with the thickness of rack body 410, bePEEK-HPV plate deburrings, make any surface finish；Then PEEK-HPV plates are placed in bending mould and are bent, send out PEEK-HPV platesRaw plastic deformation, so as to which the support portion 412 with rack body 410 is stringent mating.Put the PEEK-HPV plates being bent into mould againTool positioning, drill through later with the corresponding screw hole of the bolt fitting holes of the support portion of rack body 410 412, it is finally right againPEEK-HPV plates carry out deburring, cleaning, complete the manufacture of self-lubricating liner plate 430.Rack body 410 by stainless steel band clod wash andInto, then in support portion 412 inlay self-lubricating liner plate 430, so as to elastic support 400 its with enough shearing strength and bulletProperty, frictional behaviour is superior, self lubricity is good, corrosion-resistant, fire-retardant and with the fatigue durability excellent to alternate stress.
The outer pipe bend 300 with 100 identical latus rectum of outer tube, then the trepanning on outer pipe bend 300 are provided, by look cock600 weld together therewith, and look cock 600 and the end face of the outer pipe bend 300 is made to be set in 45 ° of angles.
During installation, outer pipe bend 300 is first arranged in the corner of inner tube 200, then by the fastener of elastic support 400420 are tightened to 200 designated position of inner tube；Lubricant will be smeared on self-lubricating liner plate 430 again, and be pushed into outer tube 100, whenOuter tube 100 stops when being contacted with outer pipe bend 300, and finally outer pipe bend 300 and outer tube 100 are welded together.
During welding, first outer pipe bend 300, inner tube 200, outer tube 100 and fixing bracket 500 are fixed in temporary support,Centering；99.99% purity argon is filled in inner and outer pipes annular space again, the position of weld seam between outer pipe bend 300 and outer tube 100With aluminium-foil paper rubber belt sealing, to prevent the leakage of argon gas；By symmetric position successively spot welding, to avoid pipe deformation, needed before spot weldingThe dirt on surface is removed, then check centering situation with grinding wheel, last full weld through welding utilizes look cock after the completion of welding600 observation outer tube weld joint on inner side Forming Qualities.
Finally, the fuel gas supply pipeline of ship is formed by multiple high-pressure gas double-wall pipe pipeline section butt welding as shown in Figure 1.
In conclusion the high-pressure gas double-wall pipe inner tube of the present invention, which can meet pressure, is up to tens MPa, temperature down to zeroLower tens degree of design requirements that low-frequency vibration is chronically at double-wall pipe during vessel motion, can using the high pressure double-wall pipe of the present inventionTo meet safety requirements of the classification society to high-pressure gas engine gas service, it is perfectly suitable for real ship and installs and uses.Performance of ventilating of the present invention is good, can effectively absorb stress, can be released effectively thermal expansion curve, can effectively absorb vibration, makeUse long lifespan.So the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripeThe personage for knowing this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.CauseThis, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such asInto all equivalent modifications or change, should by the present invention claim be covered.