CN105387660A - Double-pipe liquid reservoir and manufacturing method thereof - Google Patents
Double-pipe liquid reservoir and manufacturing method thereof Download PDFInfo
- Publication number
- CN105387660A CN105387660A CN201510762787.XA CN201510762787A CN105387660A CN 105387660 A CN105387660 A CN 105387660A CN 201510762787 A CN201510762787 A CN 201510762787A CN 105387660 A CN105387660 A CN 105387660A
- Authority
- CN
- China
- Prior art keywords
- end cover
- upper cavity
- bottom end
- pipe
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a double-pipe liquid reservoir and a manufacturing method thereof. The double-pipe liquid reservoir comprises an upper cavity, a lower end cover, an inner metal pipe, a filter screen assembly and baffles. The upper cavity is integrally formed in a spinning and necking manner through a metal pipe. The lower end cover is welded to the other end of the upper cavity to be formed. The lower end cover is provided with two or more installation holes. A long bend and a short bend or a straight pipe are welded to locating holes. The inner metal pipe is a metal pipe free of locating ribs and is in clearance fit with the whole ring of the lower end cover, and after being assembled, the inner metal pipe and the lower end cover are formed in a brazed manner. The manufacturing method of the double-pipe liquid reservoir includes the following steps that the spinning process is adopted, so that the upper cavity is integrally formed in the spinning and necking manner through the metal pipe; and the lower end cover and the upper cavity are located, welded and formed, the machining process of the whole structure is optimized, efficiency is improved, power consumption is lower, and cost is reduced. Carbon dioxide protective electric-arc welding or argon arc welding or other fusion welding is adopted, so that power consumption is lower, and cost is saved.
Description
Technical field
The present invention relates to field, particularly the two-tube reservoir of one and manufacture method thereof.
Background technology
Fluid reservoir is the vitals of compressor of air conditioner, play the effect that storage, gas-liquid separation, filtration, noise reduction and cold-producing medium cushion, it is made up of parts such as cylindrical shell, air inlet pipe, escape pipe, filter screens, its operation principle is as follows: fluid reservoir is fitted in A/C evaporator and compressor suction duct position, prevent liquid refrigerant from flowing into compressor and produce the guard block of liquid hammer, in air-conditioning system running, cannot ensure that cold-producing medium can all be vaporized completely; Namely having liquid cold-producing medium from evaporimeter cold-producing medium out enters in fluid reservoir, owing to there is no the liquid refrigerant of vaporizing because itself is than gas weight, can directly put off at the bottom of fluid reservoir cylinder, the cold-producing medium of vaporization is then entered in compressor by the outlet of fluid reservoir, thus prevents compressor inhalant liquid cryogen to cause liquid hammer.
The two-tube reservoir of tradition adopts three stage structure, and its manufacture method is following step mainly:
(1) adopt Sheet Metal Forming Technology, metallic plate punching is become upper end cover and bottom end cover.
(2) press-loading process is adopted, by baffle plate and red copper welding wire press-in middle cylinder body.
(3) press-loading process is adopted, by filtering net part and red copper welding wire press-in middle cylinder body.
(4) press-loading process is adopted, by interior metal pipe and red copper welding wire press-in bottom end cover.
(5) adopt press-loading process, upper end cover and red copper welding wire are enclosed within middle cylinder body.
(6) adopt press-loading process, bottom end cover and red copper welding wire are enclosed within middle cylinder body
(7) reducing atmosphere protection Sui Dao Lu Brazing Welding is adopted; the combiner of (1) to (6) step press-loading process is entered in high temperature tunnel furnace by high temperature resistant mesh-belt conveying; combiner is heated to about 1130 DEG C by entirety; all red copper solder fusings; combination parts Brazing is welded into type, makes reservoir cavity.
Reducing atmosphere protection Sui Dao Lu Brazing Welding, its continuous tunnel furnace system capital equipment is by (1) liquid ammonia gasification stove, and (2) ammonia destruction furnace, (3) net belt type continuous tunnel furnace three parts form.
Wherein reducing atmosphere is that liquefied ammonia is gasificated into ammonia through gasification furnace; under the high temperature of 850 DEG C, hydrogen and nitrogen is resolved into through nickel accelerant again in ammonia destruction furnace; be filled in the high-temperature burner hearth of continuous tunnel furnace, not oxidized in the reservoir assembly Gao Wen Brazing weldering process under protection high temperature.Ammonia and hydrogen are all hazardous gas, there is high potential safety hazard.
Wherein high temperature tunnel furnace uses thermal source, it is generally about 1130 DEG C that refractory metal burner hearth is heated to above red copper fusing point (1083 DEG C) by resistance wire or the heating of Elema electricity, the refractory metal burner hearth run continuously under 1130 DEG C of high temperature and high temperature resistant guipure are practical expensive high temperature resistant stainless steel manufactures, and general continuous physical life was lower than 6 months.What product-free was produced treats in the product time, considers the aging effects expanded with heat and contract with cold to burner hearth and guipure, and general whole continuous tunnel furnace system still must be in dry running under the environment of 700 DEG C of high temperature, waste mass energy.
A set of nearly 50 square metres of whole continuous tunnel furnace system footprint area, production capacity is also only less than 200/hour.
The reproducibility Sui Dao Lu Brazing Welding that complex and expensive running cost is high causes traditional syllogic two-tube reservoir manufacturing cost high.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of two-tube reservoir and manufacture method thereof, to solve the above-mentioned multinomial defect caused in prior art.
For achieving the above object, the invention provides following technical scheme: a kind of two-tube reservoir, comprise upper cavity and bottom end cover, described upper cavity adopts metal-pipe spinning necking forming, the other end welding fabrication of described bottom end cover and upper cavity, bottom end cover is provided with more than 2 or 2 installing holes, installing hole has in-flanges and flanging 2 kinds, locating hole is welded with long bend pipe and short bend pipe or straight tube and interior metal pipe respectively, described interior metal Guan Weiwu positioning bar metal tube, coordinate with the whole ring gap of bottom end cover, assembling Hou Brazing is welded into type, the interior use spinning cutting location and installation baffle plate of upper cavity and net-filter assembly.
Preferably, upper cavity adopts metal-pipe spinning necking forming.
Preferably, upper cavity and the rear welding fabrication of bottom end cover assembling.
Preferably, bottom end cover is provided with more than 2 or 2 installing holes.
Preferably, the An Zhuan Kong Brazing of bottom end cover is welded with long bend pipe and short bend pipe or straight tube etc.
Preferably, the assembling position of interior metal pipe and bottom end cover does not have positioning bar, forms the whole circle fit-up gap of monolateral 0.10 ~ 0.20 millimeter with bottom end cover.
Preferably, the whole circle fit-up gap at the assembling position of interior metal pipe and bottom end cover is welded filling by hard Brazing to complete welding assembly shaping.
Manufacture a manufacture method for two-tube reservoir, said method comprising the steps of:
1) adopt spinning necking down process, the spinning reducing of metal pipe material one end is formed upper cavity.
2) adopt press-loading process, net-filter assembly is pressed into upper cavity inside.
3) adopt spinning cutting technique, net-filter assembly is fixed on upper cavity inside.
4) adopt press-loading process, baffle plate is pressed into upper cavity inside.
5) adopt spinning cutting technique, baffle plate is fixed on upper cavity inside.
6) adopt Sheet Metal Forming Technology, metallic plate punching is become bottom end cover, bottom end cover has 1 or 2, or more than 2 installing holes, installing hole has in-flanges or flanging 2 kinds of shapes.
7) hard Brazing Welding is adopted, by bottom end cover and long bend pipe, short bend pipe, interior metal pipe welding fabrication.
8) Arcosarc welding or argon arc welding or other melting technique is adopted; By bottom end cover and upper cavity welding fabrication.
The beneficial effect of above technical scheme is adopted to be: spinning reducing that what the present invention adopted is adds Arcosarc welding (or other meltings) technique and replaces Sui Dao Lu Brazing Welding.
Spinning necking forming technique is a kind of metal pipe material continuous local plastic accumulation forming that makes is the forming process of the advanced person of hollow revolving meber, it is a conventional art with long history, spinning reducing, metal pipe material is sent in automatic numerical control spinning machine, the shaping part of needs is therefrom exposed outside, after main shaft drives metal pipe material High Rotation Speed, digital control system controls spinning roller automatically, reciprocating by the shape track of regulation, a certain size traverse feed is given when each change direction, make metal pipe material periphery undergauge step by step, obtain the part with larynx footpath shape, such as, upper cavity in the present invention.The shaping same parts of the tradition two-tube reservoir of triad, need through (1) punch forming upper end cover, (2) upper end cover places red copper welding wire, and (3) load onto end cap and middle cylinder body, and (4) assembly enters continuous tunnel furnace Gao Wen Brazing and welds.It is normal temperature plastic forming next time that the present invention adopts spinning necking down process to manufacture upper cavity, a procedure, and contrast traditional handicraft simplifies production technology, reduces process complexity, reduces power consumption, reduces manufacturing cost.
The protective gas of shield carbon-dioxide arc welding is carbon dioxide (sometimes adopting the mist of CO2+Ar).Because protective gas used is cheap, when adopting short circuiting transfer, appearance of weld is good, adds and uses the welding wire containing deoxidier can obtain quality solder joints without internal flaw.Therefore this welding method has become one of most important welding method of ferrous material at present.Such as, in the present invention upper cavity and bottom end cover welding.The shaping same part of the tradition two-tube reservoir of triad, need through (1) punch forming bottom end cover, (2) bottom end cover places red copper welding wire, and (3) assembling bottom end cover and middle cylinder body, (4) assembly enters continuous tunnel furnace Gao Wen Brazing and welds.The present invention adopts shield carbon-dioxide arc welding to weld upper cavity and bottom end cover is assembly local melting welding fabrication, a procedure, and contrast traditional handicraft simplifies production technology, reduces process complexity, reduces power consumption, reduces manufacturing cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, the long bend pipe of 1--, the short bend pipe of 2--, 3--bottom end cover, 4--middle cylinder body, 5--upper end cover, 6--baffle plate, 7--net-filter assembly, 8--interior metal pipe, 9--straight tube.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 shows the specific embodiment of the present invention: a kind of two-tube reservoir, comprise upper cavity and bottom end cover 3, upper cavity adopts metal-pipe spinning necking forming, upper cavity contains upper end cover 5 in original structure and middle cylinder body 4, the other end welding fabrication of bottom end cover 3 and upper cavity, bottom end cover 3 is provided with more than 2 or 2 installing holes, installing hole has in-flanges and flanging 2 kinds, locating hole is welded with long bend pipe 1 and short bend pipe 2 or straight tube 9 and interior metal pipe 8 respectively, interior metal pipe 8 is without positioning bar metal tube, coordinate with the whole ring gap of bottom end cover, assembling Hou Brazing is welded into type, the interior use spinning cutting location and installation baffle plate 6 of upper cavity and net-filter assembly 7.
Upper cavity adopts metal-pipe spinning necking forming; Upper cavity and bottom end cover 3 assemble rear welding fabrication; Bottom end cover 3 is provided with more than 2 or 2 installing holes; The An Zhuan Kong Brazing of bottom end cover 3 is welded with long bend pipe 1 and short bend pipe 2 or straight tube 9 etc.; Interior metal pipe 8 does not have positioning bar with the assembling position of bottom end cover 3, forms the whole circle fit-up gap of monolateral 0.10 ~ 0.20 millimeter with bottom end cover 3; Filling is welded by hard Brazing in the whole circle fit-up gap at interior metal pipe 8 and the assembling position of bottom end cover 3, and to complete welding assembly shaping.
Manufacture a manufacture method for two-tube reservoir, method comprises the following steps:
1) adopt spinning necking down process, the spinning reducing of metal pipe material one end is formed upper cavity.
2) adopt press-loading process, net-filter assembly is pressed into upper cavity inside.
3) adopt spinning cutting technique, net-filter assembly is fixed on upper cavity inside.
4) adopt press-loading process, baffle plate is pressed into upper cavity inside.
5) adopt spinning cutting technique, baffle plate is fixed on upper cavity inside.
6) adopt Sheet Metal Forming Technology, metallic plate punching is become bottom end cover, bottom end cover has 1 or 2, or more than 2 installing holes, installing hole has in-flanges or flanging 2 kinds of shapes.
7) hard Brazing Welding is adopted, by bottom end cover and long bend pipe, short bend pipe, interior metal pipe welding fabrication.
8) Arcosarc welding or argon arc welding or other melting technique is adopted; By bottom end cover and upper cavity welding fabrication.
What the present invention adopted is that spinning reducing adds Arcosarc welding (or other meltings) technique replacement Sui Dao Lu Brazing Welding.
Spinning necking forming technique is a kind of metal pipe material continuous local plastic accumulation forming that makes is the forming process of the advanced person of hollow revolving meber, it is a conventional art with long history, spinning reducing, metal pipe material is sent in automatic numerical control spinning machine, the shaping part of needs is therefrom exposed outside, after main shaft drives metal pipe material High Rotation Speed, digital control system controls spinning roller automatically, reciprocating by the shape track of regulation, a certain size traverse feed is given when each change direction, make metal pipe material periphery undergauge step by step, obtain the part with larynx footpath shape, such as, upper cavity in the present invention.The shaping same parts of the tradition two-tube reservoir of triad, need through (1) punch forming upper end cover, (2) upper end cover places red copper welding wire, and (3) load onto end cap and middle cylinder body, and (4) assembly enters continuous tunnel furnace Gao Wen Brazing and welds.It is normal temperature plastic forming next time that the present invention adopts spinning necking down process to manufacture upper cavity, a procedure, and contrast traditional handicraft simplifies production technology, reduces process complexity, reduces power consumption, reduces manufacturing cost.
The protective gas of shield carbon-dioxide arc welding is carbon dioxide (sometimes adopting the mist of CO2+Ar).Because protective gas used is cheap, when adopting short circuiting transfer, appearance of weld is good, adds and uses the welding wire containing deoxidier can obtain quality solder joints without internal flaw.Therefore this welding method has become one of most important welding method of ferrous material at present.Such as, in the present invention upper cavity and bottom end cover welding.The shaping same part of the tradition two-tube reservoir of triad, need through (1) punch forming bottom end cover, (2) bottom end cover places red copper welding wire, and (3) assembling bottom end cover and middle cylinder body, (4) assembly enters continuous tunnel furnace Gao Wen Brazing and welds.The present invention adopts shield carbon-dioxide arc welding to weld upper cavity and bottom end cover is assembly local melting welding fabrication, a procedure, and contrast traditional handicraft simplifies production technology, reduces process complexity, reduces power consumption, reduces manufacturing cost.
Below be only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (8)
1. a two-tube reservoir, it is characterized in that, comprise upper cavity and bottom end cover, described upper cavity adopts metal-pipe spinning necking forming, the other end welding fabrication of described bottom end cover and upper cavity, bottom end cover is provided with more than 2 or 2 installing holes, installing hole has in-flanges and flanging 2 kinds, locating hole is welded with long bend pipe and short bend pipe or straight tube and interior metal pipe respectively, described interior metal Guan Weiwu positioning bar metal tube, coordinate with the whole ring gap of bottom end cover, assembling Hou Brazing is welded into type, the interior use spinning cutting location and installation baffle plate of upper cavity and net-filter assembly.
2. two-tube reservoir according to claim 1, is characterized in that, upper cavity adopts metal-pipe spinning necking forming.
3. two-tube reservoir according to claim 1 and 2, is characterized in that, upper cavity and the rear welding fabrication of bottom end cover assembling.
4. two-tube reservoir according to claim 3, is characterized in that, bottom end cover is provided with more than 2 or 2 installing holes.
5. according to the two-tube reservoir described in claim 1 or 4, it is characterized in that, the An Zhuan Kong Brazing of bottom end cover is welded with long bend pipe and short bend pipe or straight tube etc.
6. two-tube reservoir according to claim 5, is characterized in that, the assembling position of interior metal pipe and bottom end cover does not have positioning bar, forms the whole circle fit-up gap of monolateral 0.10 ~ 0.20 millimeter with bottom end cover.
7. two-tube reservoir according to claim 1 or 5, is characterized in that, filling is welded by hard Brazing in the whole circle fit-up gap at the assembling position of interior metal pipe and bottom end cover, and to complete welding assembly shaping.
8. manufacture a manufacture method for the two-tube reservoir according to claim 1 to 7 any one, it is characterized in that, said method comprising the steps of:
1) adopt spinning necking down process, the spinning reducing of metal pipe material one end is formed upper cavity.
2) adopt press-loading process, net-filter assembly is pressed into upper cavity inside.
3) adopt spinning cutting technique, net-filter assembly is fixed on upper cavity inside.
4) adopt press-loading process, baffle plate is pressed into upper cavity inside.
5) adopt spinning cutting technique, baffle plate is fixed on upper cavity inside.
6) adopt Sheet Metal Forming Technology, metallic plate punching is become bottom end cover, bottom end cover has 1 or 2, or more than 2 installing holes, installing hole has in-flanges or flanging 2 kinds of shapes.
7) hard Brazing Welding is adopted, by bottom end cover and long bend pipe, short bend pipe, interior metal pipe welding fabrication.
8) Arcosarc welding or argon arc welding or other melting technique is adopted; By bottom end cover and upper cavity welding fabrication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510762787.XA CN105387660A (en) | 2015-11-10 | 2015-11-10 | Double-pipe liquid reservoir and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510762787.XA CN105387660A (en) | 2015-11-10 | 2015-11-10 | Double-pipe liquid reservoir and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105387660A true CN105387660A (en) | 2016-03-09 |
Family
ID=55420228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510762787.XA Pending CN105387660A (en) | 2015-11-10 | 2015-11-10 | Double-pipe liquid reservoir and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105387660A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247707A (en) * | 2016-09-09 | 2016-12-21 | 王裕 | A kind of air-conditioning/refrigerator reservoir assembly and manufacturing process thereof |
| CN110369959A (en) * | 2019-07-30 | 2019-10-25 | 东光县鑫圣电子有限公司 | Integral type stretches liquid storage device manufacture craft |
| CN110671846A (en) * | 2019-09-30 | 2020-01-10 | 浙江绿宇制冷配件有限公司 | Gas collector with inward and outward turned edges and manufacturing method and application thereof |
| CN109297216B (en) * | 2018-08-24 | 2020-06-26 | 芜湖三花制冷配件有限公司 | Manufacturing method of double-pipe liquid storage device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001311790A (en) * | 2000-04-27 | 2001-11-09 | Ishikawajima Harima Heavy Ind Co Ltd | Method of manufacturing vessel shell for reactor pressure vessel |
| CN2630756Y (en) * | 2003-03-19 | 2004-08-04 | 浙江三花集团有限公司 | Iron reservoir screen mesh positioning structure for compressor |
| CN1836834A (en) * | 2006-01-25 | 2006-09-27 | 叶鹏飞 | Production process for steel filtering bottle containing built-in filtering screen |
| CN101476799A (en) * | 2008-01-02 | 2009-07-08 | 海门市余东铜管厂 | Liquid container of household air-conditioner compressor and method for producing the same |
| JP2012225519A (en) * | 2011-04-15 | 2012-11-15 | Fuji Koki Corp | Accumulator |
| CN202955915U (en) * | 2012-11-29 | 2013-05-29 | 浙江盾安机械有限公司 | Spinning type gas-liquid separator |
| CN203249453U (en) * | 2013-04-27 | 2013-10-23 | 邝锡津 | Improved compressor spinning liquid storage machine |
-
2015
- 2015-11-10 CN CN201510762787.XA patent/CN105387660A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001311790A (en) * | 2000-04-27 | 2001-11-09 | Ishikawajima Harima Heavy Ind Co Ltd | Method of manufacturing vessel shell for reactor pressure vessel |
| CN2630756Y (en) * | 2003-03-19 | 2004-08-04 | 浙江三花集团有限公司 | Iron reservoir screen mesh positioning structure for compressor |
| CN1836834A (en) * | 2006-01-25 | 2006-09-27 | 叶鹏飞 | Production process for steel filtering bottle containing built-in filtering screen |
| CN101476799A (en) * | 2008-01-02 | 2009-07-08 | 海门市余东铜管厂 | Liquid container of household air-conditioner compressor and method for producing the same |
| JP2012225519A (en) * | 2011-04-15 | 2012-11-15 | Fuji Koki Corp | Accumulator |
| CN202955915U (en) * | 2012-11-29 | 2013-05-29 | 浙江盾安机械有限公司 | Spinning type gas-liquid separator |
| CN203249453U (en) * | 2013-04-27 | 2013-10-23 | 邝锡津 | Improved compressor spinning liquid storage machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247707A (en) * | 2016-09-09 | 2016-12-21 | 王裕 | A kind of air-conditioning/refrigerator reservoir assembly and manufacturing process thereof |
| CN109297216B (en) * | 2018-08-24 | 2020-06-26 | 芜湖三花制冷配件有限公司 | Manufacturing method of double-pipe liquid storage device |
| CN110369959A (en) * | 2019-07-30 | 2019-10-25 | 东光县鑫圣电子有限公司 | Integral type stretches liquid storage device manufacture craft |
| CN110369959B (en) * | 2019-07-30 | 2020-10-09 | 东光县鑫圣电子有限公司 | Manufacturing process of integrated stretching liquid storage device |
| CN110671846A (en) * | 2019-09-30 | 2020-01-10 | 浙江绿宇制冷配件有限公司 | Gas collector with inward and outward turned edges and manufacturing method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105387660A (en) | Double-pipe liquid reservoir and manufacturing method thereof | |
| CN101235812B (en) | Totally-enclosed -type compressor suction duct connecting mechanism | |
| CN101666568B (en) | Liquid reservoir and manufacture method thereof as well as air-conditioner | |
| CN205064214U (en) | Pump breathing pipe, compressor breathing pipe subassembly and compressor | |
| CN102848137A (en) | Method for manufacturing gas collecting tube component and air-conditioning system | |
| CN102248345A (en) | End plate surfacing fixture and manufacturing method | |
| CN105711078B (en) | A kind of welder and method of fluoroplastics exchanger tubes and tubesheets | |
| CN103506807A (en) | Method for manufacturing silencer of split-type structure | |
| CN110073162A (en) | Extension leg return bend and its method for converter | |
| CN105312703A (en) | Welding assembly method for air condition compressor upper cover | |
| CN103032294B (en) | A kind of compressor suction duct and manufacture method and application | |
| CN105436686A (en) | Manufacturing method for liquid storage tank | |
| CN103032640B (en) | Compressor exhaust pipe and manufacturing method and application of compressor exhaust pipe | |
| CN105575744B (en) | A kind of preparation method of carbon nanometer cold cathode X-ray tube | |
| CN1238672C (en) | Machining process for reservoir of rotary compressor for air conditioner | |
| CN202835961U (en) | Liquid accumulator with element rests | |
| CN205615004U (en) | Fluoroplastics heat exchange pipe and pipe plate's welding set | |
| CN103361467B (en) | Method for online repairing furnace-wall water cooling block of arc furnace | |
| CN106270872A (en) | A kind of vacuum induction composite brazing method | |
| CN102873421B (en) | Vacuum carrier gas aluminum brazing furnace | |
| CN207064189U (en) | Air-breathing instlated tubular and compressor | |
| CN207999810U (en) | A kind of bushing type blast orifice oxygen burner | |
| CN204321422U (en) | Novel welding structure body | |
| CN202303790U (en) | Air collecting pipe component and air-conditioner system thereof | |
| CN202968645U (en) | Device for conveying steel billets in heating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160309 |