CN103170809B - The processing technology of lower Discharging bent-tube - Google Patents

The processing technology of lower Discharging bent-tube Download PDF

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CN103170809B
CN103170809B CN201310128917.5A CN201310128917A CN103170809B CN 103170809 B CN103170809 B CN 103170809B CN 201310128917 A CN201310128917 A CN 201310128917A CN 103170809 B CN103170809 B CN 103170809B
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water
pipe
tube
bend pipe
welding
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CN103170809A (en
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周建兵
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周建兵
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Abstract

The invention discloses the processing technology of lower Discharging bent-tube, comprise the following steps: the first step, the processing of forming elbow comprises copper pipe pipe decontamination, copper pipe is taken the lead, trombone slide, cut, annealing, bend pipe, second step, the processing of water out adapter, 3rd step, the processing of water outlet main body, 4th step, the processing of bubbler shell, 5th step, welding water out adapter and bend pipe, 6th step, welding water outlet main body and bend pipe, 5th step, the arrangement of Discharging bent-tube, sale can be packed, the end face that postwelding of the present invention scrapes step is smooth, avoid drainage, outlet pipe and bubbler shell closely cooperate, dislocation-free phenomenon, thus reach the effect of water-impervious.

Description

The processing technology of lower Discharging bent-tube
Technical field
The present invention relates to the manufacture field of metal pipe material, be specifically related to the processing technology of lower Discharging bent-tube.
Background technology
At present, the lower Discharging bent-tube that market is sold is primarily of bend pipe, joint, bubbler shell composition, and bend pipe there will be following a few point defect when processing:
1, because joint is identical with bore, during welding, due to expanded by heating, local deformation, causes end face out-of-flatness and end face has welding fluid to overflow, (be comparatively difficult to ensure with bubbler shell interworking type is not good and demonstrate,prove its cylindricity, and there is inconsistent phenomenon, because tube wall is thinner, for removing dislocation, easily pipe is thrown during polishing and collapses), easily there is drainage during examination water;
2, after welding filled in by joint, welding ends is undressed, easily there is welding fluid, and end face out-of-flatness, (be comparatively difficult to ensure and demonstrate,prove its cylindricity, and there is inconsistent phenomenon with bubbler shell interworking type is not good, because tube wall is thinner, for removing dislocation, easily pipe being thrown during polishing and collapsing), easily there is drainage during examination water.
Summary of the invention
In order to overcome above shortcomings part in prior art, the object of the present invention is to provide a kind of processing technology of lower Discharging bent-tube, the end face of the method postwelding bend pipe is smooth, again can good controlling dimension, avoid drainage, and coordinate with bubbler shell closely, dislocation-free phenomenon, meet its cylindricity requirement.
In order to reach above-mentioned object, the present invention adopts following concrete technical scheme: the processing technology of lower Discharging bent-tube, comprises the following steps:
The first step, the processing of forming elbow:
(1) copper pipe pipe decontamination: copper pipe is dipped into the sulfuric acid washing that concentration is 6%-10%, after 10-15 minute, then through twice clear water washing, to dilute remaining sulfate liquid;
(2) copper pipe is taken the lead: be placed in mould by the copper pipe one end after cleaning, taken the lead by punch press, and to strike out length and width be the square of 60mm*10mm;
(3) trombone slide: the copper pipe after punching press is put into saponified oil and soaks 8-12 minute, after its tube core sufficient lubrication immersion oil, then puts into mould trombone slide shaping Φ 24+0.05* Φ 22.6+0.05mm, and tube wall thickness is even, and bias must not more than 0.1mm;
(4) cut: the copper pipe pipe fitting drawn being cut into Φ 24+0.05* Φ 22.6+0.05*203+1mm;
(5) anneal: from copper pipe two ends, 80mm place carries out annealing in process, between the temperature of annealing is 550-600 DEG C, adjustment flame aims at copper pipe surface calcination until dark red state appears in copper pipe surface, needs left and right slightly to move around up and down during annealing, guarantees that annealing evenly;
(6) bend pipe: the angle at copper pipe two ends is set to 15 degree, the bad phenomenon such as bend pipe surface must not crush, wrinkling, bulge, distortion, then use cutting machine smooth for the two ends otch of bend pipe, impulse-free robustness, with cutting machine, bend pipe decile is cut to two sections again, the shaping of last water side, ensures its circularity requirement;
Second step, the processing of water out adapter: by numerical control lathe by water out adapter turning, weldering ring recess, endoporus, outer tooth, piece surface must not crush, and screw thread ensures that drift leads to, the tight mistake of no-go gage; 3rd step, the processing of water outlet main body: by numerical control lathe by water outlet main body turning, endoporus, chamfering, then with bench drill boring Φ 8mm, finally uses Presser Dashing spline;
4th step, the processing of bubbler shell: by numerical control lathe by bubbler shell vehicle cylindrical, endoporus, interior tooth, piece surface must not crush, screw thread ensures that drift leads to, the tight mistake of no-go gage; 5th step, welding water out adapter and bend pipe:
(1) weld: first load onto weldering circle at water out adapter, again water out adapter dipped appropriate soldering paste and be pressed into the water side of bend pipe, ensure that water out adapter step is concordant with the water side of bend pipe, the flame of welding adopts slight oxidation flame, treats that welding fluid just in time overflows leaf and then stops adding thermal weld; (2) pickling: the water out adapter welded and bend pipe are put into pickling tube and soaks, the sulfuric acid that concentration is 6%-10% put into by pickling tube, soak time is 10-15 minute, use clean water again, dilute remaining sulfate liquid, finally high temperature washing in high-temperature water channel, and must degreaser be added in high-temperature water channel, remove pipe fitting oil film, accelerate dissolution soldering paste, the time is 3-5 minute; (3) entirely examine: whether inspection has failure welding, as bad in burn, distortion, welding slag etc. and sorting placement;
(4) step is scraped: water out adapter right hand parallel alignment is screwed fixture in screw thread, switch leaves to clockwise state by left hand, the right hand can not unclamp suitably to be held with a firm grip, till water out adapter screws, left hand pulls lower cutter hand to carry out turning even with suitable speed, water out adapter is in rotary course as find that there is obvious whipping phenomenon, can not process, for defective products need identify isolation timely, after turning, starting switch leaves to halted state by left hand, water out adapter level is held with a firm grip by the suitable power of the right hand, left hand by switch to inverted-state, water out adapter can exit automatically, after completion of processing, switch is threaded to halted state by left hand,
(5) milling circular arc: bend pipe is fixed in clamping, adjustment throttle valve control milling cutter feed speed, prevents pipe fitting curls inward from scrapping;
6th step, welding water outlet main body and bend pipe:
(1) weld: the milling arc section of bend pipe is dipped the apopore that water outlet main body aimed at by appropriate soldering paste, be placed on welding tooling, the flame of welding adopts slight oxidation flame, sends into welding rod when tube-surface to be curved is aglow, treats that welding fluid is evenly distributed on its surface;
(2) pickling: the bend pipe welded is put into pickling tube and soaks, the sulfuric acid that concentration is 6%-10% put into by pickling tube, soak time is 10-15 minute, again with clear water reserviors cleaning, dilute remaining sulfate liquid, finally high temperature washing in high-temperature water channel, and must degreaser be added in high-temperature water channel, remove pipe fitting oil film, accelerate dissolution soldering paste, the time is 3-5 minute;
(3) entirely examine: whether inspection has failure welding, as bad in burn, distortion, welding slag etc. and sorting placement;
(4) water is tried: be placed on completely in water by the Discharging bent-tube processed, pass into the air pressure of 0.6-0.8MPa, after spray calmness, stop 3-5 second, whether the weld observing water out adapter, water outlet main body and bend pipe has bubble to overflow, and bubble-free is overflowed and then judged non-defective unit; 7th step, the arrangement of Discharging bent-tube:
(1) bubbler shell is assembled: water side bubbler shell being tightened in Discharging bent-tube; (2) sanding: select the sand paper of 180#, 240#, 400#, 600#, 1000# to carry out sanding to pipe fitting respectively, sanding pipe fitting must not throw distortion, and throwing is collapsed;
(3) to play Mah-Jong wheel: with numb buff polishing Discharging bent-tube, cured or purple cured with the use of Huang; (4) letter out: take turns letter out with cloth, cured with the use of Samsung purple, appearance burnishing surface Ra≤0.2um;
(5) check: whether the surface of inspection polished part is damaged, scratches, is out of shape, sleek, antiscuffing paste etc. are bad and sorting placement;
(6) outgoing plating is packed: with outgoing external coordination plating after expanded polyethylene foam, dividing plate, packed in cases; (7) check outward appearance: whether inspection plated item is damaged, burnt, rubescent etc. bad, screw out bubbler shell, check screw thread with screw thread checking device, bubbler shell should with pipe fitting one_to_one corresponding; (8) secondary examination water: the Discharging bent-tube processed is placed in water completely, pass into the air pressure of 0.6-0.8MPa, after spray calmness, stop 3-5 second, whether the weld observing water out adapter, water outlet main body and bend pipe has bubble to overflow, and bubble-free is overflowed and then judged non-defective unit; (9) pack: the corresponding packaging material of non-defective unit is packed, every case data consistent.
Compared with prior art, the present invention has following outstanding advantages and effect: the end face that postwelding of the present invention scrapes step is smooth, avoids drainage, and outlet pipe and bubbler shell closely cooperate, dislocation-free phenomenon, thus the effect reaching water-impervious.
Specific embodiment
In order to explain technical scheme of the present invention further, below by specific embodiment, the present invention will be described in detail.
The processing technology of lower Discharging bent-tube, comprises the following steps:
The first step, the processing of forming elbow:
(1) copper pipe pipe decontamination: copper pipe is dipped into the sulfuric acid washing that concentration is 6%-10%, after 10-15 minute, then through twice clear water washing, to dilute remaining sulfate liquid;
(2) copper pipe is taken the lead: be placed in mould by the copper pipe one end after cleaning, taken the lead by punch press, and to strike out length and width be the square of 60mm*10mm;
(3) trombone slide: the copper pipe after punching press is put into saponified oil and soaks 8-12 minute, after its tube core sufficient lubrication immersion oil, then puts into mould trombone slide shaping Φ 24+0.05* Φ 22.6+0.05mm, and tube wall thickness is even, and bias must not more than 0.1mm;
(4) cut: the copper pipe pipe fitting drawn being cut into Φ 24+0.05* Φ 22.6+0.05*203+1mm;
(5) anneal: from copper pipe two ends, 80mm place carries out annealing in process, between the temperature of annealing is 550-600 DEG C, adjustment flame aims at copper pipe surface calcination until dark red state appears in copper pipe surface, needs left and right slightly to move around up and down during annealing, guarantees that annealing evenly;
(6) bend pipe: the angle at copper pipe two ends is set to 15 degree, the bad phenomenon such as bend pipe surface must not crush, wrinkling, bulge, distortion, then use cutting machine smooth for the two ends otch of bend pipe, impulse-free robustness, with cutting machine, bend pipe decile is cut to two sections again, the shaping of last water side, ensures its circularity requirement;
Second step, the processing of water out adapter: by numerical control lathe by water out adapter turning, weldering ring recess, endoporus, outer tooth, piece surface must not crush, and screw thread ensures that drift leads to, the tight mistake of no-go gage; 3rd step, the processing of water outlet main body: by numerical control lathe by water outlet main body turning, endoporus, chamfering, then with bench drill boring Φ 8mm, finally uses Presser Dashing spline;
4th step, the processing of bubbler shell: by numerical control lathe by bubbler shell vehicle cylindrical, endoporus, interior tooth, piece surface must not crush, screw thread ensures that drift leads to, the tight mistake of no-go gage; 5th step, welding water out adapter and bend pipe:
(1) weld: first load onto weldering circle at water out adapter, again water out adapter dipped appropriate soldering paste and be pressed into the water side of bend pipe, ensure that water out adapter step is concordant with the water side of bend pipe, the flame of welding adopts slight oxidation flame, treats that welding fluid just in time overflows leaf and then stops adding thermal weld; (2) pickling: the water out adapter welded and bend pipe are put into pickling tube and soaks, the sulfuric acid that concentration is 6%-10% put into by pickling tube, soak time is 10-15 minute, use clean water again, dilute remaining sulfate liquid, finally high temperature washing in high-temperature water channel, and must degreaser be added in high-temperature water channel, remove pipe fitting oil film, accelerate dissolution soldering paste, the time is 3-5 minute; (3) entirely examine: whether inspection has failure welding, as bad in burn, distortion, welding slag etc. and sorting placement;
(4) step is scraped: water out adapter right hand parallel alignment is screwed fixture in screw thread, switch leaves to clockwise state by left hand, the right hand can not unclamp suitably to be held with a firm grip, till water out adapter screws, left hand pulls lower cutter hand to carry out turning even with suitable speed, water out adapter is in rotary course as find that there is obvious whipping phenomenon, can not process, for defective products need identify isolation timely, after turning, starting switch leaves to halted state by left hand, water out adapter level is held with a firm grip by the suitable power of the right hand, left hand by switch to inverted-state, water out adapter can exit automatically, after completion of processing, switch is threaded to halted state by left hand,
(5) milling circular arc: bend pipe is fixed in clamping, adjustment throttle valve control milling cutter feed speed, prevents pipe fitting curls inward from scrapping;
6th step, welding water outlet main body and bend pipe:
(1) weld: the milling arc section of bend pipe is dipped the apopore that water outlet main body aimed at by appropriate soldering paste, be placed on welding tooling, the flame of welding adopts slight oxidation flame, sends into welding rod when tube-surface to be curved is aglow, treats that welding fluid is evenly distributed on its surface;
(2) pickling: the bend pipe welded is put into pickling tube and soaks, the sulfuric acid that concentration is 6%-10% put into by pickling tube, soak time is 10-15 minute, again with clear water reserviors cleaning, dilute remaining sulfate liquid, finally high temperature washing in high-temperature water channel, and must degreaser be added in high-temperature water channel, remove pipe fitting oil film, accelerate dissolution soldering paste, the time is 3-5 minute;
(3) entirely examine: whether inspection has failure welding, as bad in burn, distortion, welding slag etc. and sorting placement;
(4) water is tried: be placed on completely in water by the Discharging bent-tube processed, pass into the air pressure of 0.6-0.8MPa, after spray calmness, stop 3-5 second, whether the weld observing water out adapter, water outlet main body and bend pipe has bubble to overflow, and bubble-free is overflowed and then judged non-defective unit;
7th step, the arrangement of Discharging bent-tube:
(1) bubbler shell is assembled: water side bubbler shell being tightened in Discharging bent-tube;
(2) sanding: select the sand paper of 180#, 240#, 400#, 600#, 1000# to carry out sanding to pipe fitting respectively, sanding pipe fitting must not throw distortion, and throwing is collapsed;
(3) to play Mah-Jong wheel: with numb buff polishing Discharging bent-tube, cured or purple cured with the use of Huang;
(4) letter out: take turns letter out with cloth, cured with the use of Samsung purple, appearance burnishing surface Ra≤0.2um;
(5) check: whether the surface of inspection polished part is damaged, scratches, is out of shape, sleek, antiscuffing paste etc. are bad and sorting placement;
(6) outgoing plating is packed: with outgoing external coordination plating after expanded polyethylene foam, dividing plate, packed in cases;
(7) check outward appearance: whether inspection plated item is damaged, burnt, rubescent etc. bad, screw out bubbler shell, check screw thread with screw thread checking device, bubbler shell should with pipe fitting one_to_one corresponding;
(8) secondary examination water: the Discharging bent-tube processed is placed in water completely, pass into the air pressure of 0.6-0.8MPa, after spray calmness, stop 3-5 second, whether the weld observing water out adapter, water outlet main body and bend pipe has bubble to overflow, and bubble-free is overflowed and then judged non-defective unit;
(9) pack: the corresponding packaging material of non-defective unit is packed, every case data consistent.

Claims (1)

1. descend the processing technology of Discharging bent-tube, comprise the following steps:
The first step, the processing of forming elbow:
(1) copper pipe pipe decontamination: copper pipe is dipped into the sulfuric acid washing that concentration is 6%-10%, after 10-15 minute, then through twice clear water washing, to dilute remaining sulfate liquid;
(2) copper pipe is taken the lead: be placed in mould by the copper pipe one end after cleaning, taken the lead by punch press, and to strike out length and width be the square of 60mm*10mm;
(3) trombone slide: the copper pipe after punching press is put into saponified oil and soaks 8-12 minute, after its tube core sufficient lubrication immersion oil, then puts into mould trombone slide shaping Φ 24+0.05* Φ 22.6+0.05mm, and tube wall thickness is even, and bias must not more than 0.1mm;
(4) cut: the copper pipe pipe fitting drawn being cut into Φ 24+0.05* Φ 22.6+0.05*203+1mm;
(5) anneal: from copper pipe two ends, 80mm place carries out annealing in process, between the temperature of annealing is 550-600 DEG C, adjustment flame aims at copper pipe surface calcination until dark red state appears in copper pipe surface, needs left and right slightly to move around up and down during annealing, guarantees that annealing evenly;
(6) bend pipe: the angle at copper pipe two ends is set to 15 degree, bend pipe surface must not crush, wrinkling, bulge, distortion bad phenomenon, then use cutting machine smooth for the two ends otch of bend pipe, impulse-free robustness, with cutting machine, bend pipe decile is cut to two sections again, the shaping of last water side, ensures its circularity requirement;
Second step, the processing of water out adapter: by numerical control lathe by water out adapter turning, weldering ring recess, endoporus, outer tooth, piece surface must not crush, and screw thread ensures that drift leads to, the tight mistake of no-go gage;
3rd step, the processing of water outlet main body: by numerical control lathe by water outlet main body turning, endoporus, chamfering, then with bench drill boring Φ 8mm, finally uses Presser Dashing spline;
4th step, the processing of bubbler shell: by numerical control lathe by bubbler shell vehicle cylindrical, endoporus, interior tooth, piece surface must not crush, screw thread ensures that drift leads to, the tight mistake of no-go gage; 5th step, welding water out adapter and bend pipe:
(1) weld: first load onto weldering circle at water out adapter, again water out adapter dipped appropriate soldering paste and be pressed into the water side of bend pipe, ensure that water out adapter step is concordant with the water side of bend pipe, the flame of welding adopts slight oxidation flame, treats that welding fluid just in time overflows leaf and then stops adding thermal weld;
(2) pickling: the water out adapter welded and bend pipe are put into pickling tube and soaks, the sulfuric acid that concentration is 6%-10% put into by pickling tube, soak time is 10-15 minute, use clean water again, dilute remaining sulfate liquid, finally high temperature washing in high-temperature water channel, and must degreaser be added in high-temperature water channel, remove pipe fitting oil film, accelerate dissolution soldering paste, the time is 3-5 minute;
(3) entirely examine: whether inspection has failure welding, as burn, distortion, the bad and sorting placement of welding slag;
(4) step is scraped: water out adapter right hand parallel alignment is screwed fixture in screw thread, switch leaves to clockwise state by left hand, the right hand can not unclamp suitably to be held with a firm grip, till water out adapter screws, left hand pulls lower cutter hand to carry out turning even with suitable speed, water out adapter is in rotary course as find that there is obvious whipping phenomenon, can not process, for defective products need identify isolation timely, after turning, starting switch leaves to halted state by left hand, water out adapter level is held with a firm grip by the suitable power of the right hand, left hand by switch to inverted-state, water out adapter can exit automatically, after completion of processing, switch is threaded to halted state by left hand,
(5) milling circular arc: bend pipe is fixed in clamping, adjustment throttle valve control milling cutter feed speed, prevents pipe fitting curls inward from scrapping;
6th step, welding water outlet main body and bend pipe:
(1) weld: the milling arc section of bend pipe is dipped the apopore that water outlet main body aimed at by appropriate soldering paste, be placed on welding tooling, the flame of welding adopts slight oxidation flame, sends into welding rod when tube-surface to be curved is aglow, treats that welding fluid is evenly distributed on its surface;
(2) pickling: the bend pipe welded is put into pickling tube and soaks, the sulfuric acid that concentration is 6%-10% put into by pickling tube, soak time is 10-15 minute, again with clear water reserviors cleaning, dilute remaining sulfate liquid, finally high temperature washing in high-temperature water channel, and must degreaser be added in high-temperature water channel, remove pipe fitting oil film, accelerate dissolution soldering paste, the time is 3-5 minute;
(3) entirely examine: whether inspection has failure welding, as burn, distortion, the bad and sorting placement of welding slag;
(4) water is tried: be placed on completely in water by the Discharging bent-tube processed, pass into the air pressure of 0.6-0.8MPa, after spray calmness, stop 3-5 second, whether the weld observing water out adapter, water outlet main body and bend pipe has bubble to overflow, and bubble-free is overflowed and then judged non-defective unit;
7th step, the arrangement of Discharging bent-tube:
(1) bubbler shell is assembled: water side bubbler shell being tightened in Discharging bent-tube;
(2) sanding: select the sand paper of 180#, 240#, 400#, 600#, 1000# to carry out sanding to pipe fitting respectively, sanding pipe fitting must not throw distortion, and throwing is collapsed;
(3) to play Mah-Jong wheel: with numb buff polishing Discharging bent-tube, cured or purple cured with the use of Huang;
(4) letter out: take turns letter out with cloth, cured with the use of Samsung purple, appearance burnishing surface Ra≤0.2um;
(5) check: whether the surface of inspection polished part is damaged, scratches, is out of shape, sleek, antiscuffing paste are bad and sorting placement;
(6) outgoing plating is packed: with outgoing external coordination plating after expanded polyethylene foam, dividing plate, packed in cases;
(7) check outward appearance: whether inspection plated item is damaged, burnt, rubescent bad, screw out bubbler shell, check screw thread with screw thread checking device, bubbler shell should with pipe fitting one_to_one corresponding;
(8) secondary examination water: the Discharging bent-tube processed is placed in water completely, pass into the air pressure of 0.6-0.8MPa, after spray calmness, stop 3-5 second, whether the weld observing water out adapter, water outlet main body and bend pipe has bubble to overflow, and bubble-free is overflowed and then judged non-defective unit;
(9) pack: the corresponding packaging material of non-defective unit is packed, every case data consistent.
CN201310128917.5A 2013-04-15 2013-04-15 The processing technology of lower Discharging bent-tube Expired - Fee Related CN103170809B (en)

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CN103990943B (en) * 2014-05-08 2016-04-13 刘良坚 The cold compression molding method of hose coupling fuse and a kind of hose coupling fuse
CN103962806A (en) * 2014-05-15 2014-08-06 玉环凯贝利阀门有限公司 Processing technology of water distributor integrated water outlet
CN105834685A (en) * 2016-04-26 2016-08-10 苏州昭沃五金科技有限公司 Machining process for three-curved-groove connector sleeve
CN105834701B (en) * 2016-06-15 2017-11-21 芜湖金源机械制造有限公司 The processing method of engine water branch connecting pipe
CN108747211A (en) * 2018-05-11 2018-11-06 苏州飞赫企业管理有限公司 A kind of production technology of novel compression joint type pipe joint

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US4103709A (en) * 1976-09-13 1978-08-01 Stanadyne, Inc. Spout tube assembly
GB2104625A (en) * 1981-08-21 1983-03-09 Karrer Weber & Cie Ag Sanitary fittings
CN2224317Y (en) * 1995-04-21 1996-04-10 顺德市高士洁具有限公司 Handle-less swing-type water tap
DE19844627A1 (en) * 1998-09-29 2000-04-20 Meloh Armaturen Ruppel & Meloh Water fitting with several releasably interconnected parts uses insert connection secured by screw - clamp device with through passage aperture in accommodation part and threaded hole with inserted screw in insert part
CN2505666Y (en) * 1999-12-30 2002-08-14 江西弋阳富达铜材有限公司 Special reducing delivery elbow pipe
CN1796861A (en) * 2004-12-20 2006-07-05 段焕玉 Technique for fabricating drainpipe made from stainless steel
CN200984043Y (en) * 2006-12-30 2007-12-05 陈俊平 Structure of water outlet pipe
CN102873514A (en) * 2012-10-11 2013-01-16 马鞍山马钢表面工程技术有限公司 Method for processing crystallizer copper pipe with upper and lower installation spigots
CN103028905A (en) * 2012-11-30 2013-04-10 苏州市意可机电有限公司 Copper pipe joint machining process

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KR101114548B1 (en) * 2010-01-27 2012-02-27 허인성 How to make water hammer absorber

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103709A (en) * 1976-09-13 1978-08-01 Stanadyne, Inc. Spout tube assembly
GB2104625A (en) * 1981-08-21 1983-03-09 Karrer Weber & Cie Ag Sanitary fittings
CN2224317Y (en) * 1995-04-21 1996-04-10 顺德市高士洁具有限公司 Handle-less swing-type water tap
DE19844627A1 (en) * 1998-09-29 2000-04-20 Meloh Armaturen Ruppel & Meloh Water fitting with several releasably interconnected parts uses insert connection secured by screw - clamp device with through passage aperture in accommodation part and threaded hole with inserted screw in insert part
CN2505666Y (en) * 1999-12-30 2002-08-14 江西弋阳富达铜材有限公司 Special reducing delivery elbow pipe
CN1796861A (en) * 2004-12-20 2006-07-05 段焕玉 Technique for fabricating drainpipe made from stainless steel
CN200984043Y (en) * 2006-12-30 2007-12-05 陈俊平 Structure of water outlet pipe
CN102873514A (en) * 2012-10-11 2013-01-16 马鞍山马钢表面工程技术有限公司 Method for processing crystallizer copper pipe with upper and lower installation spigots
CN103028905A (en) * 2012-11-30 2013-04-10 苏州市意可机电有限公司 Copper pipe joint machining process

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