CN1651163A - Hydraulic shaping device of stainless steel lined compound pipe and its shaping method - Google Patents
Hydraulic shaping device of stainless steel lined compound pipe and its shaping method Download PDFInfo
- Publication number
- CN1651163A CN1651163A CN 200510023829 CN200510023829A CN1651163A CN 1651163 A CN1651163 A CN 1651163A CN 200510023829 CN200510023829 CN 200510023829 CN 200510023829 A CN200510023829 A CN 200510023829A CN 1651163 A CN1651163 A CN 1651163A
- Authority
- CN
- China
- Prior art keywords
- bloated
- chamber
- head
- stainless steel
- sealing ring
- 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
Images
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A hydraulic apparatus for forming a composite pipe with stainless steel liner is composed of core rod, left and right expanding ehads fixed respectively to both ends of said core rod, two self-fastened sealing rings for left and right expanding heads, and the fixers at the ends of said expanding heads. Its forming technology is also disclosed.
Description
Technical field
The present invention relates to industry, civilian compound pipeline complex pipeline machining technology, is the processing technology that a kind of fluid is carried the lining pipeline, specifically, is stainless steel lined compound pipe hydraulic forming device and shaped by fluid pressure method thereof.
Background technology
Stainless steel lined compound pipe is to be composited with stainless steel (internal layer) and two kinds of metal materials of carbon steel (skin), thereby possess two kinds of properties of materials, in carrying flow liquid process, can adapt to strong, big pressure, the higher environment of temperature of reaching that wear and tear of corrosivity, be widely used at industrial departments such as oil, chemical industry, nuclear power, light industry and mechanical engineerings.Compare with the mono-material metal tube, can save material, reduce cost.
The principle that shaped by fluid pressure is produced multiple tube is: two pipe boxes are fitted together, inner tube is pressurizeed, along with the pipe internal pressure raises, inner tube enters state of plastic deformation by strain, and two pipes fit tightly together, behind interior pipe pressure removal, as the elastic recovery of outer tube elastic recovery greater than inner tube, then inner and outer pipes fits tightly and makes multiple tube.Compare with additive method, can determine required moulding hydraulic pressure exactly, bigger advantage is being arranged aspect product quality and the production efficiency, have only a few countries to have this technology at present in the world according to the interlayer applying residual stress level that will reach after the moulding.The key technology that shaped by fluid pressure is produced the multiple tube device is the hydraulic packing at pipe two ends, two ends hydraulic packing in the foreign technology all is to adopt metal plug structure to finish, as shown in Figure 1, make the end of plug and multiple tube inner tube form line contact or face contact contact pressure along tubular axis to plug being applied external force by oil cylinder, to reach the sealing purpose of bearing the unlikely leakage of moulding hydraulic pressure in the pipe.This system's oil cylinder and supporting structure complexity are installed hugely, are difficult to carry out effective seal to being welded with seam stainless steel inner tube.And in fact in multiple tube production because current standard gapless stainless steel tube diameter, the thickness equidimension is difficult to and carbon steel pipe size coupling, mostly adopt to be welded with the seam stainless steel tube and to make lining according to the diameter dimension of standard carbon steel pipe.
Therefore, designing a kind of can the employing is welded with the shaped device that the seam stainless steel tube makees lining and becomes the technical problem that those skilled in the art press for solution.
Summary of the invention
Technical problem to be solved of the present invention is to provide a kind of new type hydraulic to make stainless steel lined compound pipe shaped device and shaped by fluid pressure method, to overcome the above-mentioned defective that prior art exists.
The present invention is design like this, because shaped by fluid pressure is made multiple tube, needs certain pressure.Obtain this pressure and must carry out effective seal the two ends of multiple tube.The present invention utilizes the principle of self-tightening sealing, and promptly high more its self-tightening sealing effect of moulding hydraulic pressure is good more, utilizes special-shaped seal ring to replace two ends forced seal plug, implements effective sealing at the two ends of multiple tube.
The technical scheme of technical solution problem of the present invention is as follows:
A kind of stainless steel lined compound pipe hydraulic forming device, it is characterized in that, comprise core bar, the core bar two ends are fixedly connected with bloated head in a left side and right expanding head respectively, the external diameter of described core bar less than want the internal diameter of pipe in the compound stainless steel, be respectively equipped with the self-tightening sealing circle on the right expanding head of a left side, the end of bloated head is provided with fixture, both sides self-tightening sealing circle, form the bloated chamber of closing of sealing between core bar external diameter and the stainless steel inner tube diameter, described each self-tightening sealing circle two sides are adjacent to fixture and the corresponding head that expands respectively, be provided with sealing ring between fixture and the bloated head, be provided with fluid course and the exhaust passage of leading to the sealing ring inner chamber in the described bloated head, and lead to expand and close the fluid course and the exhaust passage in chamber.
As preferred implementation of the present invention, described self-tightening sealing circle is a fixing ring, and fixture is a hold-down nut, and sealing ring is the O RunddichtringO between described nut and the bloated head.The bloated head in left side is provided with and leads to the bloated fluid course in chamber that closes, the bloated head in right side is provided with and leads to bloated exhaust passage of closing the chamber, be equipped with the fluid course that leads to the sealing ring inner chamber on the two bloated heads about described, described sealing ring inner chamber exhaust passage is separately positioned on the top of bloated head in a left side and right expanding head.
A kind of method of shaped by fluid pressure stainless steel lined compound pipe comprises the steps:
A). the stainless steel inner tube is sleeved on outer tube;
B). core bar is packed in the inner tube, load onto self-tightening sealing circle and sealing ring successively at the two ends of the head that expands, screw the fixture at two ends, the two sides that make special-shaped seal ring and fixture and expanding is adjacent to;
C). to the water filling of self-tightening sealing circle cavity, close air bleeding valve after filling with water, press in the control sealing ring chamber to make it reach the required interior pressure of setting, in sealing ring the chamber in to satisfy sealing ring initial sealing conditional request;
D). behind the sealing ring performance sealing function, close to expanding and to inject highly pressurised liquid water in the chamber, treat that multiple tube expands to close to close drain tap after filling with water in the chamber, expand and close intraluminal fluid and press and reach consistent rapidly with annular seal space pressure;
E). progressively turn down pressure valve 1, behind the required maximum pressure of the bloated synthesis type of multiple tube, pressurize a period of time;
F). during the system release, expand earlier and close the synchronous release in chamber and sealing ring chamber, when unload be depressed into set the sealing load value after, first removal is bloated to close cavity pressure, the pressure in removal sealing ring chamber again.
By above disclosed technical scheme as can be known, the present invention compared with prior art has following advantage:
(1) the present invention adopts a kind of radial displacement deformability strong self-tightening type abnormity rubber seal and core bar structure, replaces the hermetically-sealed construction of two ends plug, thereby has cancelled the hydraulic jack and the heavy supporting arrangement at two ends.The hydraulic coupling of employing highly pressurised liquid expands and closes the manufacturing multiple tube, and expanded joint power is even, and workmanship guarantees easily.Expanded joint is made the Hydraulic expansion-jointing power of multiple tube, can determine according to geometric parameter, the material performance index accurate Calculation of multiple tube inner and outer pipes.The manufacture method science is reliable.
(2) self-tightening type abnormity rubber seal is soft sealing, and its sealing property can not only be applicable to the multiple tube production of seamless liner far above the rigid sealing of metal plug, also can guarantee positiver sealing to the shaped by fluid pressure that is welded with the seam liner.
(3) core bar structure has significantly reduced the filling amount when hydraulic pressure expands synthesis type, can reduce the axial force in the manufacture process, has both reduced the load of high-pressure pump, saves energy resource consumption, shortens the pressurising time greatly again.
(4) adopt self-tightening type abnormity rubber seal, the interior hydraulic pressure of sealing ring equals moulding hydraulic pressure and just can guarantee sealing, thereby only need a hydraulic power source, simple in structure, thereby saved the coordinated control system between the two required cover pressure sources of external device, reduce investment, and easy to operate, the production efficiency of raising multiple tube.Apparatus of the present invention and method also can be produced the multiple tube as other precious metal material linings such as copper, aluminium simultaneously.
Description of drawings
Fig. 1 is the bloated multiple tube device that closes of existing taper plug sealed hydraulic;
Fig. 2 is a hydraulic forming device structural representation of the present invention.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
Referring to Fig. 2, stainless steel lined compound pipe hydraulic forming device of the present invention, comprise core bar 1, core bar 1 two ends are fixedly connected with left bloated 2 and right expanding head 3 respectively, the external diameter of described core bar 1 is less than the internal diameter of pipe 8 in the compound stainless steel of want, be respectively equipped with self-tightening sealing circle 4 on the right expanding head of a left side, the end of bloated head is provided with fixture 5, both sides self-tightening sealing circle 4, form the bloated chamber 6 of closing of sealing in core bar 1 external diameter and the stainless steel between pipe 8 internal diameters, described each self-tightening sealing circle 4 two sides are adjacent to fixture 5 and the corresponding head that expands respectively, be provided with sealing ring 7 between fixture 5 and the bloated head, be provided with fluid course 10 and the exhaust passage 11 of leading to the sealing ring inner chamber in the described bloated head, and lead to expand and close the fluid course 12 and the exhaust passage 13 in chamber.
Described self-tightening sealing circle 4 is a fixing ring, and fixture 5 is a hold-down nut, and sealing ring 7 is the O RunddichtringO between described nut and the bloated head.
The bloated head in left side is provided with and leads to the bloated fluid course 12 in chamber that closes, the bloated head in right side is provided with and leads to bloated exhaust passage 13 of closing the chamber, be equipped with the fluid course that leads to the sealing ring inner chamber on the two bloated heads about described, described sealing ring inner chamber exhaust passage 11 is separately positioned on the top of bloated head in a left side and right expanding head.
The step of shaped by fluid pressure stainless steel lined compound pipe of the present invention is as follows: stainless steel inner tube 8 is sleeved on earlier with outer tube 9, after core bar 1 is packed in the stainless steel inner tube 8, load onto special-shaped seal ring 4 and O RunddichtringO 7 successively at the two ends of left right expanding head 2 and 3, screw the hold-down nut 5 at two ends, the two sides of each special-shaped seal ring 4 and the bloated head of hold-down nut 5 and homonymy are adjacent to.
At first start high-pressure hydraulic pump and open special-shaped seal ring chamber inlet valve 14,15, liquid (water) enters in the cavity 22 of special-shaped seal ring simultaneously by the top fluid course 10 and the right expanding head bottom fluid course 10 of the bloated head in a left side, closes air bleeding valve 16,17 after treating to fill with water in the special-shaped seal ring chamber, multiple tube two ends 22.Reach in the setting required in the sealing ring chamber and press with the pressure valve 18 control exit of pump pressure that reflux, to satisfy special-shaped seal ring 4 initial sealing conditional requests.This moment, special-shaped seal ring 4 radially swelled, its external diameter contacts with the internal diameter of pipe 8 in the stainless steel and forms sealing surface, and the special-shaped seal ring both wings axially open under hydraulic pressure simultaneously, because the self-tightening sealing principle, all sealed cover ratio pressures reach the purpose of pre-tightening seal all far above hydraulic pressure.Open valve 19 behind the special-shaped seal ring 4 performance sealing functions, the bottom fluid course 12 injection stainless steel inner tube 8 of head that again this highly pressurised liquid water expanded from a left side and bloated the closing in the chamber 6 of core bar 1 composition, intracavity gas is 13 eliminatings from exhaust passage, right expanding head 3 top, treat that multiple tube expands to close and close drain tap 20 after filling with water in the chamber 6, expand and close that hydraulic pressure reach consistent rapidly with profiled seal chamber 22 pressure in the chamber 6.Progressively turn down pressure valve 18, behind the required maximum pressure of the bloated synthesis type of multiple tube, pressurize a period of time.During the system release, as long as Open valve 18, then expand and close chamber 6 and the 22 synchronous releases of special-shaped seal ring chamber, when unload be depressed into set the sealing load value after, close sealing ring chamber 22 inlet valves 14,15, complete opening valve 19,21, and close high-pressure hydraulic pump, after closing the cavity pressure removal when expanding, opening encapsulation circle chamber valve 14,15 again, the pressure in removal sealing ring chamber 22.Finish the bloated synthesis type process of stainless steel lined compound pipe.
The above only is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention.All equalizations of doing according to the scope of the invention change and modify, and are the present invention and contain.
Claims (4)
1. stainless steel lined compound pipe hydraulic forming device, it is characterized in that, comprise core bar, the core bar two ends are fixedly connected with bloated head in a left side and right expanding head respectively, the external diameter of described core bar less than want the internal diameter of pipe in the compound stainless steel, be respectively equipped with the self-tightening sealing circle on the right expanding head of a left side, the end of bloated head is provided with fixture, both sides self-tightening sealing circle, form the bloated chamber of closing of sealing between core bar external diameter and the stainless steel inner tube diameter, described every side self-tightening sealing circle two sides are adjacent to fixture and the corresponding head that expands respectively, be provided with sealing ring between fixture and the bloated head, be provided with fluid course and the exhaust passage of leading to the sealing ring inner chamber in the described bloated head, and lead to expand and close the fluid course and the exhaust passage in chamber.
2. stainless steel lined compound pipe hydraulic forming device according to claim 1 is characterized in that, described self-tightening sealing circle is a fixing ring, and fixture is a hold-down nut, and sealing ring is the O RunddichtringO between described nut and the bloated head.
3. stainless steel lined compound pipe hydraulic forming device according to claim 1 and 2, it is characterized in that, the bloated head in left side is provided with and leads to the bloated fluid course in chamber that closes, the bloated head in right side is provided with and leads to bloated exhaust passage of closing the chamber, be equipped with the fluid course that leads to the sealing ring inner chamber on the two bloated heads about described, described sealing ring inner chamber exhaust passage is separately positioned on the top of bloated head in a left side and right expanding head.
4. a method of utilizing claim 1,2,3 described stainless steel lined compound pipe hydraulic forming device shaped by fluid pressure stainless steel lined compound pipes is characterized in that, comprises the steps:
A). the stainless steel inner tube is sleeved on outer tube;
B). core bar is packed in the inner tube, load onto self-tightening sealing circle and sealing ring successively at the two ends of the head that expands, screw the fixture at two ends, the two sides that make special-shaped seal ring and fixture and expanding is adjacent to;
C). to the water filling of self-tightening sealing circle cavity, close air bleeding valve after filling with water, press in the control sealing ring chamber to make it reach the required interior pressure of setting, in sealing ring the chamber in to satisfy sealing ring initial sealing conditional request;
D). behind the sealing ring performance sealing function, close to expanding and to inject highly pressurised liquid water in the chamber, treat that multiple tube expands to close to close drain tap after filling with water in the chamber, expand and close intraluminal fluid and press and reach consistent rapidly with annular seal space pressure;
E). progressively turn down pressure valve, behind the required maximum pressure of the bloated synthetic shape of multiple tube, pressurize a period of time;
F). during the system release, expand earlier and close the synchronous release in chamber and sealing ring chamber, when unload be depressed into set the sealing load value after, first removal is bloated to close cavity pressure, the pressure in removal sealing ring chamber again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510023829 CN1651163A (en) | 2005-02-04 | 2005-02-04 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510023829 CN1651163A (en) | 2005-02-04 | 2005-02-04 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1651163A true CN1651163A (en) | 2005-08-10 |
Family
ID=34875960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510023829 Pending CN1651163A (en) | 2005-02-04 | 2005-02-04 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1651163A (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581059A (en) * | 2012-02-14 | 2012-07-18 | 江苏三汇联发管业有限公司 | Hydrostatic pressure expanding composite technology for bimetal composite pipe |
| CN102083565B (en) * | 2008-07-04 | 2013-06-05 | 新日铁住金株式会社 | Hydroforming method and hydroformed component |
| CN103240324A (en) * | 2013-05-08 | 2013-08-14 | 中国重型机械研究院股份公司 | Liquid-expansion forming system for bimetal composite pipe |
| CN103527860A (en) * | 2013-10-21 | 2014-01-22 | 番禺珠江钢管（珠海）有限公司 | Bimetal composite pipe semi-finished product and machining method thereof |
| CN103574220A (en) * | 2013-08-31 | 2014-02-12 | 宝鸡石油钢管有限责任公司 | Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof |
| CN103736810A (en) * | 2013-12-25 | 2014-04-23 | 桂林电子科技大学 | Impact hydraulic expansion device for metal thin-wall tube and using method thereof |
| CN103785755A (en) * | 2014-02-28 | 2014-05-14 | 上海理工大学 | Hydraulic manufacturing mold, system and method for a double-channel double-layer pipe |
| CN104307957A (en) * | 2014-10-14 | 2015-01-28 | 宁波思明汽车科技有限公司 | Punch pin for internal high pressure forming |
| CN104307955A (en) * | 2014-10-14 | 2015-01-28 | 宁波思明汽车科技有限公司 | Punching head for internal high-pressure forming |
| CN104772739A (en) * | 2015-03-27 | 2015-07-15 | 鹤山联塑实业发展有限公司 | Preparation device of steel-plastic composite pipe provided with stainless steel bushing |
| CN105215219A (en) * | 2015-10-28 | 2016-01-06 | 中国重型机械研究院股份公司 | The composite bimetal pipe formation system of a kind of heating and hydraulic pressure coupling |
| CN105290241A (en) * | 2015-10-28 | 2016-02-03 | 中国重型机械研究院股份公司 | Bimetal composite pipe forming technology and system with heating and water pressure coupling functions |
| CN105344791A (en) * | 2015-11-23 | 2016-02-24 | 宁波思明汽车科技股份有限公司 | Plug structure for inner high pressure forming |
| CN106424293A (en) * | 2016-11-29 | 2017-02-22 | 桂林电子科技大学 | Liquid shock forming device and forming method for thin-walled metal pipe |
| CN106623579A (en) * | 2016-10-08 | 2017-05-10 | 济南大学 | Internal high-pressure forming pushing and pressing device |
| CN107289814A (en) * | 2017-07-19 | 2017-10-24 | 中国人民解放军军械工程学院 | Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel |
| CN107289813A (en) * | 2017-07-19 | 2017-10-24 | 中国人民解放军军械工程学院 | A kind of outer Self tightening device of firearms barrel hydraulic pressure and outer tightening method |
| CN107442672A (en) * | 2017-09-11 | 2017-12-08 | 常州大学 | A kind of method of inner-walls of duct covering lead inside bromine tank container body |
| CN108297392A (en) * | 2018-01-24 | 2018-07-20 | 南京理工大学 | A kind of external pressurized device for manufacturing bilayer sleeve |
| CN109807249A (en) * | 2019-01-25 | 2019-05-28 | 西安理工大学 | A kind of composite bimetal pipe expanded joint molded test device |
| CN112404232A (en) * | 2020-11-02 | 2021-02-26 | 东莞市中帆新材料科技有限公司 | Hydraulic expansion piston type sealing push head for pipe |
| CN115111060A (en) * | 2022-05-30 | 2022-09-27 | 航宇智造（北京）工程技术有限公司 | Aircraft engine air inlet duct and integrated forming process thereof |
-
2005
- 2005-02-04 CN CN 200510023829 patent/CN1651163A/en active Pending
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083565B (en) * | 2008-07-04 | 2013-06-05 | 新日铁住金株式会社 | Hydroforming method and hydroformed component |
| CN102581059B (en) * | 2012-02-14 | 2014-02-26 | 江苏三汇联发管业有限公司 | Hydrostatic pressure expanding composite technology for bimetal composite pipe |
| CN102581059A (en) * | 2012-02-14 | 2012-07-18 | 江苏三汇联发管业有限公司 | Hydrostatic pressure expanding composite technology for bimetal composite pipe |
| CN103240324A (en) * | 2013-05-08 | 2013-08-14 | 中国重型机械研究院股份公司 | Liquid-expansion forming system for bimetal composite pipe |
| CN103574220A (en) * | 2013-08-31 | 2014-02-12 | 宝鸡石油钢管有限责任公司 | Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof |
| CN103527860A (en) * | 2013-10-21 | 2014-01-22 | 番禺珠江钢管（珠海）有限公司 | Bimetal composite pipe semi-finished product and machining method thereof |
| CN103527860B (en) * | 2013-10-21 | 2016-04-13 | 番禺珠江钢管（珠海）有限公司 | Composite bimetal pipe semi-finished product and processing method |
| CN103736810B (en) * | 2013-12-25 | 2015-12-16 | 桂林电子科技大学 | Impact hydraulic expansion device for metal thin-wall tube and using method thereof |
| CN103736810A (en) * | 2013-12-25 | 2014-04-23 | 桂林电子科技大学 | Impact hydraulic expansion device for metal thin-wall tube and using method thereof |
| CN103785755A (en) * | 2014-02-28 | 2014-05-14 | 上海理工大学 | Hydraulic manufacturing mold, system and method for a double-channel double-layer pipe |
| CN103785755B (en) * | 2014-02-28 | 2016-01-20 | 上海理工大学 | The hydraulic pressure mfg. moulding die of the double-deck pipe fitting of binary channels, manufacturing system and manufacture method |
| CN104307957A (en) * | 2014-10-14 | 2015-01-28 | 宁波思明汽车科技有限公司 | Punch pin for internal high pressure forming |
| CN104307955A (en) * | 2014-10-14 | 2015-01-28 | 宁波思明汽车科技有限公司 | Punching head for internal high-pressure forming |
| CN104772739A (en) * | 2015-03-27 | 2015-07-15 | 鹤山联塑实业发展有限公司 | Preparation device of steel-plastic composite pipe provided with stainless steel bushing |
| CN105290241A (en) * | 2015-10-28 | 2016-02-03 | 中国重型机械研究院股份公司 | Bimetal composite pipe forming technology and system with heating and water pressure coupling functions |
| CN105215219A (en) * | 2015-10-28 | 2016-01-06 | 中国重型机械研究院股份公司 | The composite bimetal pipe formation system of a kind of heating and hydraulic pressure coupling |
| CN105215219B (en) * | 2015-10-28 | 2017-09-26 | 中国重型机械研究院股份公司 | A kind of composite bimetal pipe formation system heated with hydraulic pressure coupling |
| CN105344791B (en) * | 2015-11-23 | 2017-10-24 | 宁波思明汽车科技股份有限公司 | The stopper structure being molded for inner high voltage |
| CN105344791A (en) * | 2015-11-23 | 2016-02-24 | 宁波思明汽车科技股份有限公司 | Plug structure for inner high pressure forming |
| CN106623579A (en) * | 2016-10-08 | 2017-05-10 | 济南大学 | Internal high-pressure forming pushing and pressing device |
| CN106623579B (en) * | 2016-10-08 | 2018-07-24 | 济南大学 | Interior high-pressure molding pressing device |
| CN106424293A (en) * | 2016-11-29 | 2017-02-22 | 桂林电子科技大学 | Liquid shock forming device and forming method for thin-walled metal pipe |
| CN106424293B (en) * | 2016-11-29 | 2018-07-13 | 桂林电子科技大学 | A kind of hydraulic shock building mortion and manufacturing process for metal thin wall pipe |
| CN107289813A (en) * | 2017-07-19 | 2017-10-24 | 中国人民解放军军械工程学院 | A kind of outer Self tightening device of firearms barrel hydraulic pressure and outer tightening method |
| CN107289814A (en) * | 2017-07-19 | 2017-10-24 | 中国人民解放军军械工程学院 | Movable hydraulic Self tightening device and tightening method outside a kind of firearms barrel |
| CN107442672A (en) * | 2017-09-11 | 2017-12-08 | 常州大学 | A kind of method of inner-walls of duct covering lead inside bromine tank container body |
| CN108297392A (en) * | 2018-01-24 | 2018-07-20 | 南京理工大学 | A kind of external pressurized device for manufacturing bilayer sleeve |
| CN108297392B (en) * | 2018-01-24 | 2019-10-18 | 南京理工大学 | It is a kind of for manufacturing the external pressurized device of bilayer sleeve |
| CN109807249A (en) * | 2019-01-25 | 2019-05-28 | 西安理工大学 | A kind of composite bimetal pipe expanded joint molded test device |
| CN109807249B (en) * | 2019-01-25 | 2020-11-17 | 西安理工大学 | Bimetal composite pipe expansion joint forming test device |
| CN112404232A (en) * | 2020-11-02 | 2021-02-26 | 东莞市中帆新材料科技有限公司 | Hydraulic expansion piston type sealing push head for pipe |
| CN115111060A (en) * | 2022-05-30 | 2022-09-27 | 航宇智造（北京）工程技术有限公司 | Aircraft engine air inlet duct and integrated forming process thereof |
| CN115111060B (en) * | 2022-05-30 | 2024-06-07 | 航宇智造（北京）工程技术有限公司 | Air inlet channel of aircraft engine and integrated forming process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1651163A (en) | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method | |
| CN202676556U (en) | Hydrostatic test sealing device | |
| CN101497096B (en) | Device for processing reducer pipe fitting with big section difference and method for shaping the same | |
| CN107166113A (en) | Adaptive pipe jointer oval under water | |
| CN102107240A (en) | Simple tube hydro-bulging device and bulging method | |
| CN103611768A (en) | Hydraulic forming technology of tube blank of small-sized corrugated tube and forming die sheet special for tube blank of small-sized corrugated tube | |
| CN200945508Y (en) | Metal composite tube manufacturing apparatus | |
| CN101696623A (en) | Steel wire cord expanding rubber packer for oil or gas well | |
| CN101672721A (en) | Intelligent comprehensive test bed for hydraulic oil pipes | |
| CN103240324A (en) | Liquid-expansion forming system for bimetal composite pipe | |
| CN112590092A (en) | Pipeline polytetrafluoroethylene lining isobaric preparation process | |
| CN205640034U (en) | Split type hydraulic submarine pipeline repairing device | |
| CN203695715U (en) | Metal bellows hydro-forming device with internal thread fit sealing structure | |
| CN214022876U (en) | Flexible bending forming device for automobile exhaust emission pipe fitting | |
| CN201184161Y (en) | Automatic tight formula rod-pumped well polish rod seals packing box | |
| CN104377904A (en) | Forming device for equal-wall-thickness metal stator lining and machining method for metal lining stator | |
| CN204083291U (en) | A kind of lightweight plates gate valve | |
| CN209943504U (en) | High-temperature high-pressure sealing device | |
| CN211039752U (en) | Top-mounted fixed ball valve capable of realizing online quick disassembly and maintenance | |
| CN203743599U (en) | Steel pipe cold extruding valve | |
| CN106838538A (en) | A kind of Pressurized plugging clamp and application method for blind flange end face sand holes | |
| CN2709644Y (en) | Hydraulic boost buffer expanding packer | |
| CN112845750A (en) | Device and method for hydraulic forming of ultra-large-diameter corrugated pipe | |
| CN2878872Y (en) | Pipe capping | |
| CN110541995A (en) | Clamping device of submarine pipeline plugging pipe and submarine pipeline plugging equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |