CN101905502B - Casting mold for vortex-induced vibration suppression device - Google Patents
Casting mold for vortex-induced vibration suppression device Download PDFInfo
- Publication number
- CN101905502B CN101905502B CN2010102440008A CN201010244000A CN101905502B CN 101905502 B CN101905502 B CN 101905502B CN 2010102440008 A CN2010102440008 A CN 2010102440008A CN 201010244000 A CN201010244000 A CN 201010244000A CN 101905502 B CN101905502 B CN 101905502B
- Authority
- CN
- China
- Prior art keywords
- die
- punch
- vortex
- vibration suppression
- suppression device
- 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.)
- Active
Links
Images
Abstract
The invention discloses a casting mold for a vortex-induced vibration suppression device. The casting mold comprises an underframe, a rotating tilt stand, a female die, a female die support, a male die, a male die support, a rotating mechanism, a pressing mechanism, a hydraulic station, a heating device and the like; the female die consists of a semicircular female mold with a spiral groove, and a built-in heating coil; the male die consists of a semicircular male mold; the rotating mechanism and the pressing mechanism are hydraulic power mechanisms to control the rotating tilt stand and the male mold to oscillate; the mold comprises two sets to realize the casting of two parts of the vortex-induced vibration suppression device; and finally the two half parts are assembled into a molded product of the vortex-induced vibration suppression device.
Description
Technical field
The present invention relates to a kind of casting mold, particularly about a kind of casting mold of protecting marine riser with vortex-induced vibration suppression device.
Background technology
Marine riser is the key equipment that connects operations offshore platform and seabed drilling facility in the deep-sea oil gas development system, and like drilling well waterproof casing, transfusion standpipe etc., its cost often surpasses 50% of whole system.When ocean current process standpipe structure; Can produce vortex alternately in the standpipe both sides, thereby form periodic panting action power at body structure surface, particularly vertical with current in a lateral direction; The periodicity lift vibration amplitude that vortex brings out is bigger, is easy to form vortex-induced vibration.If the vortex-induced vibration frequency near the natural frequency of vibration of standpipe, will produce synchronously or locking phenomena, this moment, structure can take place significantly to vibrate.Vortex-induced vibration is the main cause that causes deep-sea standpipe recurring structure unstability and fatigue rupture.In recent decades, the oil gas field that caused by vortex-induced vibration destruction because of marine riser both at home and abroad stops production and the incident of marine site pollution in wide area happens occasionally, and has not only brought enormous economic loss, and has destroyed the marine eco-environment.Therefore, the safety problem of deep-sea standpipe has obtained the extensive concern of various countries' ocean engineerings circle, studies one after another and produces the device that can suppress vortex-induced vibration, makes its protection deep-sea standpipe.But usually; Vortex-induced vibration suppression device requires to have specific cross sectional shape; Therefore its manufacturing process is very complicated, is difficult to realize mechanization and mass production, for example a kind of vortex-induced vibration suppression device of polyurethane elastomer material; Because its complex structure on the make just is difficult to realize mechanization production.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of casting mold for vortex-induced vibration suppression device, this mould is fit to the shaping characteristic of vortex-induced vibration suppression device, is fit to use cast polyurethane.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of casting mold for vortex-induced vibration suppression device; It is characterized in that: comprise a underframe and rotation tilt stand, support by the rotation dump ram at front end between them, articulate by rotating shaft in the rear end; On the rotation tilt stand, erectting has die to support, and die supports goes up fixedly die; Said die is two that are provided with in pairs, corresponding die cavity with half vortex-induced vibration suppression device, and die is made up of concave die cavity and heating tube; Lean on the bottom of rear end to offer the sprue gate at concave die cavity; Upper surface at concave die cavity is provided with sealing strip, by the protruding outer of the and arranged on left and right sides of concave die cavity, on the outer, offers bolt hole; Through bolt concave die cavity being fixed on said die supports; Be surrounded by several heating tubes in the bottom of said concave die cavity, said heating tube is supported on said die and supports, and in the corresponding respectively import that is connected to heater in said heating tube two ends and the outlet; Said punch is arranged on the top of die, comprises steel pipe, heating tube and punch lid, and the external diameter of said steel pipe is corresponding with the concave die cavity internal diameter; Inboard lower branch at said steel pipe is laid with several heating tubes, and said heating tube two ends correspondence respectively are connected in the import and outlet of heater, in the front top position of said steel pipe; Offer dead head; Said dead head is corresponding with the sprue gate that bottom, concave die cavity rear end is offered, and half-turn is fastened with the punch lid on the outside of said steel pipe, and the horizontal ends of said punch lid is to the left and right outer of stretching out; Outer on this outer and the concave die cavity is involutory; Said punch lid is connected to punch and supports, and said punch supports and comprises that one covers direct-connected die sinking rocking arm with punch, and the centre of said die sinking rocking arm is connected to rocking arm through rotating shaft and supports; The other end is connected on the die sinking oil cylinder piston bar, and said rocking arm supports and the die sinking oil cylinder is fixed on the said rotation tilt stand; The apposition position in the outer of said punch and die; Left and rightly be symmetrically arranged with 2～3 groups of hold-down mechanisms; Said hold-down mechanism comprises a compressed oil cylinder; The piston rod end of compressed oil cylinder connects one and compresses rocking arm, and the said rocking arm middle part that compresses is supported through the rotating shaft rotation by rocking arm, on said rocking arm support and the fixing said rotation tilt stand of compressed oil cylinder.
Said concave die cavity is one to have the semi-round ring shape concave surface die cavity of helical groove, and die cavity has certain-length.
Said die is provided with vortex-induced vibration suppression device and takes advantage of the die cavity of inserting convexity and taking advantage of slotting groove.
Said punch is provided with vortex-induced vibration suppression device and takes advantage of the die cavity of inserting convexity and taking advantage of slotting groove.
Half vortex-induced vibration suppression device respectively is set on said die and the punch takes advantage of the die cavity of inserting convexity and taking advantage of slotting groove.
Heating tube on said die and the punch is compiling by manifold trunk into and out of end, and heating agent gets into high-end outflow from the heating tube low side.
Said heating tube is supported by fixed head perforation at two ends, and the fixed head of an end fixes with the heating tube welding, and the fixed head of the other end is freely to support; Said heating tube is supported by the U-shaped clamp that is fixed on die support and the punch steel pipe in the centre.
Said punch tops is provided with hanger and trimming handle, is connected to punch through hanger and supports.
Said die and the convex mould surface coating polytetrafluorethylecoatings coatings stated.
The present invention is owing to take above technical scheme, and it has the following advantages: 1, the present invention follows the design feature of vortex-induced vibration suppression device, adopts two semicircle dies; Use in pairs; Water respectively and outpour first half vortex-induced vibration suppression device and Lower Half vortex-induced vibration suppression device, be combined into finished product then in use and get final product, such half module molding mode; Mould is better processed, and pouring technology is held well.2, heating tube is set in die, has played insulation effect, make potting syrup in the whole process of cast, can both keep steady temperature, it is smooth and easy to circulate, defectives such as the cold shut of avoiding, pore.3, same, punch of the present invention adapts to the structure of die, also is provided with heating tube, and die, the upper and lower heating together of punch make the die cavity environment temperature uniformity in the middle of being folded in.4, the present invention adopts the rotation tilt stand can mould be lifted certain angle, adopts the pouring type that goes out on advancing down, helps potting syrup filling die cavity.5, the present invention is at punch, die surface applied polytetrafluorethylecoatings coatings; Polytetrafluorethylecoatings coatings is with having repellency between the polyurethane material, therefore, this cast polyurethane mould is produced the vortex-induced vibration suppression device product; Do not need releasing agent, improved surface quality of products.6, owing to used heater and automatic temp controller, can realize the casting mold temperature auto control, improve the service efficiency of casting mold according to the temperature of cast polyurethane technological requirement.Therefore, the present invention has realized the mechanization production of polyurethane elastomer vortex-induced vibration suppression device moulding by casting in practical application.The product of its moulding meets specific cross sectional shape and can suppress the ocean deepwater standpipe because the caused vortex-induced vibration of ocean current.
Description of drawings
Fig. 1 is the sketch map of marine riser vortex-induced vibration suppression device;
Fig. 2 is that sketch map is cutd open in the A-A rotation of Fig. 1;
Fig. 3 is the outside drawing of die apparatus of the present invention;
Fig. 4 is the cross sectional representation of mould;
Fig. 5 is that the master of die of the present invention looks sketch map;
Fig. 6 is the A-A generalized section of Fig. 5;
Fig. 7 is that sketch map is looked on the left side of Fig. 5;
Fig. 8 is the plan view of Fig. 5;
Fig. 9 is that the master of punch of the present invention looks sketch map;
Figure 10 is the schematic top plan view of Fig. 9;
Figure 11 is that sketch map is looked on the right side of Fig. 9;
Figure 12 is the A-A generalized section of Figure 10;
Figure 13 is a punch die sinking sketch map 1;
Figure 14 is a punch die sinking sketch map 2.
In the accompanying drawing: 100-marine riser vortex-induced vibration suppression device, 101-spiral wing, the 102-socket joint is protruding, 103-socket joint groove, the 104-first half, 105-Lower Half, 106-steel band; The 107-marine riser, the 1-underframe, 2-rotates tilt stand, and the 3-die supports, the 4-die, the 5-punch, the 6-punch supports; 7-rotates dump ram, 8-rotating shaft, 9-concave die cavity, 10-heating tube, 11-sprue gate, 12-sealing strip; The 13-bolt hole, 14-fixed head, 15-manifold trunk, 16-heater, 17-steel pipe, 18-punch lid; The 19-dead head, 20, the 21-die cavity, the 22-hanger, the 23-trimming handle, 24-die sinking rocking arm, the 25-rocking arm supports; 26-die sinking oil cylinder, the 27-compressed oil cylinder, 28-compresses rocking arm, and the 29-rocking arm supports, 30-rotating shaft, 31-Hydraulic Station.
The specific embodiment
Carry out detailed description below in conjunction with accompanying drawing and embodiment to of the present invention.
Like Fig. 1, shown in Figure 2, marine riser vortex-induced vibration suppression device 100 is a kind of tubulose protective devices that the marine riser outer surface is subject to the ocean current impact site that are enclosed in.It is generally processed by corrosion-resistant, anti-polyurethane elastomeric materials of washing away, and its appearance generally has spiral wing 101, and two ends have socket joint protruding 102 and socket joint groove 103.Be difficult in the practical engineering application process directly be nested into pipe on from an end of marine riser a complete vortex-induced vibration suppression device; But need vortex-induced vibration suppression device be made into the first half 104 and Lower Half 105 two halves in advance, with steel band 106 it is tightened on marine riser 107 then.
Therefore; The present invention tackles this shaping characteristic of vortex-induced vibration suppression device; A kind of casting mold is provided, and like Fig. 3, shown in Figure 4, it comprises underframe 1, rotation tilt stand 2, die support 3, die 4, punch 5, punch support 6, rotating mechanism, hold-down mechanism etc. basically.
Particularly, underframe 1 and the 2 upper and lower settings of rotation tilt stand near rotation dump ram 7 support and connection by rotating mechanism of the position of front end, are articulating near the position of the rear end rotating shaft 8 by rotating mechanism between them.Rotation tilt stand 2 relies on the breakdown action of rotation dump ram 7 to realize the wallowing motion around rotating shaft 8.
On rotation tilt stand 2, erectting has die to support 3, and die supports on 3 the fixedly die 4 of mould of the present invention.Because the present invention is intended to make the first half 104 and Lower Half 105 two parts respectively through mould, make up then, therefore; In die set of the present invention, need comprise a pair of die, two dies have the die cavity of the first half 104 and the die cavity of Lower Half 105 respectively; A correspondence pours into the first half 104 of vortex-induced vibration suppression device; Another correspondence pours into the Lower Half 105 of vortex-induced vibration suppression device, and in cast each time, fixing a kind of die is poured into a mould in die support 3 earlier; And then change and do another die and pour into a mould, the punch corresponding with die also needs replacing simultaneously.Because two kinds of dies are except that different on die cavity, other structures are all the same, so half module is that example is introduced before the present embodiment:
Like Fig. 5～shown in Figure 8, die 4 comprises concave die cavity 9 and heating tube 10 two parts, and concave die cavity 9 is one to have the semi-round ring shape concave surface die cavity of helical groove (being the spiral wing after the moulding), and die cavity has certain-length.Lean on the bottom of rear end to offer sprue gate 11 at concave die cavity, because sprue gate 11 near rotating shaft 8 one ends, is therefore pressed for low side and annotated high-end overflow (as shown in Figure 6); On the arc surface of concave die cavity 9 and planarea, be provided with sealing strip 12 (as shown in Figure 8); On concave die cavity, offer the protruding and socket joint groove die cavity of socket joint of vortex-induced vibration suppression device.By concave die cavity 9 protruding outers, on the outer, offer bolt hole 13, through bolt concave die cavity 9 is fixed on die and supports on 3 (like Fig. 7, shown in 8).
Be surrounded by several heating tubes 10 in the bottom of concave die cavity 9, every heating tube 10 is axially laying along die from the beginning to the end all.Heating tube 10 is supported by fixed head 14 perforation at two ends, and general only welding at one end is fixing, and the other end is a free end; Heating tube 10 supports the U-shaped clamp support on 3 in the middle part by being fixed on die.Many heating tubes 10 are all compiled by manifold trunk 15 at head end and tail end, and (as shown in Figure 3) gone up in two corresponding respectively again heating agent import and heating agent outlets that are connected to external heat device 16 of manifold trunk 15.
Shown in Fig. 9～12, punch 5 of the present invention is half circular convex mould, comprises steel pipe 17, heating tube 10, punch lid 18.The semicircle convex surface of punch is formed by steel pipe 17, and is corresponding with die, and the die cavity internal diameter of the external diameter of steel pipe 17 and die is suitable.The inside at steel pipe 17 is laid with half-turn heating tube 10 by the bottom; The arrangement of heating tube 10 and die are similar in the punch, also are that the centre is fixed on the steel pipe inboard by the U-shaped clamp, and two ends are supported outside the protruded tube by fixed head; Compile end and be connected to heater, do not do at this and give unnecessary details by manifold trunk.
Also offer dead head 19 on the steel pipe 17, dead head 19 is positioned at the front position of mould, and away from rotating shaft 8, rising head up, and is corresponding with the sprue gate 11 of concave die cavity rear end.
Like Figure 13, shown in 14, it is the rotary moveable supporting mechanism that punch supports 6, can on mould, arrange two covers in front and back, and it comprises a die sinking rocking arm 24, rocking arm support 25, die sinking oil cylinder 26.One end of die sinking rocking arm 24 is connected on the hanger 22 through bearing pin, and the centre is connected to rocking arm through rotating shaft and supports on 25, and the other end is connected on the die sinking oil cylinder piston bar.Die sinking oil cylinder 26 is fixed on the rotation tilt stand 2.
Shown in Fig. 4, Figure 13～14, be symmetrically fixed with 2～3 groups of hold-down mechanisms in that mould is left and right.Behind punch and die matched moulds, hold-down mechanism is pressed on the matched moulds place and land area is compressed.Hold-down mechanism is the same with punch support 6; Mainly comprise compressed oil cylinder 27; The piston rod end connection of compressed oil cylinder 27 compresses rocking arm 28, compresses rocking arm 28 middle supports around rotating shaft 30 by rocking arm support 29 and rotates, and compressed oil cylinder 27 and rocking arm support 29 are fixed on the rotation tilt stand 2.When compressing rocking arm 28 and fall, be pressed on the edge of punch, rely on said line seal bar and semicircle sealing strip to form complete seal between die and the punch.
Above-mentioned die and convex mould surface apply polytetrafluorethylecoatings coatings.Polytetrafluorethylecoatings coatings is with having repellency between the polyurethane material, therefore, this cast polyurethane mould is produced the vortex-induced vibration suppression device product, does not need releasing agent, has improved surface quality of products.
Above-mentioned each hydraulic jack is by Hydraulic Station 31 fuel feeding.
The present invention also is provided with heater and automatic temp controller, can realize the casting mold temperature auto control according to the temperature of cast polyurethane technological requirement, and control accuracy has improved the service efficiency of casting mold at ± 2 ℃.
Claims (9)
1. casting mold for vortex-induced vibration suppression device; It is characterized in that: comprise a underframe and rotation tilt stand, support by the rotation dump ram at front end between them, articulate by rotating shaft in the rear end; On the rotation tilt stand, erectting has die to support, and die supports goes up fixedly die;
Said die is two that are provided with in pairs, corresponding die cavity with half vortex-induced vibration suppression device, and die is made up of concave die cavity and heating tube; Lean on the bottom of rear end to offer the sprue gate at concave die cavity; Upper surface at concave die cavity is provided with sealing strip, by the protruding outer of the and arranged on left and right sides of concave die cavity, on the outer, offers bolt hole; Through bolt concave die cavity being fixed on said die supports; Be surrounded by several heating tubes in the bottom of said concave die cavity, said heating tube is supported on said die and supports, and in the corresponding respectively import that is connected to heater in said heating tube two ends and the outlet;
Also comprise a punch, said punch is arranged on the top of die, comprises steel pipe, heating tube and punch lid; The external diameter of said steel pipe is corresponding with the concave die cavity internal diameter, is laid with several heating tubes at the inboard lower branch of said steel pipe, in the import that said heating tube two ends are corresponding respectively to be connected to heater and the outlet; Front top position at said steel pipe offers dead head, and said dead head is corresponding with the sprue gate that bottom, concave die cavity rear end is offered; Half-turn is fastened with the punch lid on the outside of said steel pipe; The horizontal ends of said punch lid is to the left and right outer of stretching out, and the outer on this outer and the concave die cavity is involutory, and said punch lid is connected to punch and supports; Said punch supports and comprises that one covers direct-connected die sinking rocking arm with punch; The centre of said die sinking rocking arm is connected to rocking arm through rotating shaft and supports, and the other end is connected on the die sinking oil cylinder piston bar, and said rocking arm supports and the die sinking oil cylinder is fixed on the said rotation tilt stand;
The apposition position in the outer of said punch and die; Left and rightly be symmetrically arranged with 2～3 groups of hold-down mechanisms; Said hold-down mechanism comprises a compressed oil cylinder; The piston rod end of compressed oil cylinder connects one and compresses rocking arm, and the said rocking arm middle part that compresses is supported through the rotating shaft rotation by rocking arm, on said rocking arm support and the fixing said rotation tilt stand of compressed oil cylinder.
2. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: said concave die cavity is one to have the semi-round ring shape concave surface die cavity of helical groove, and die cavity has certain-length.
3. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: said die is provided with vortex-induced vibration suppression device and takes advantage of the die cavity of inserting convexity and taking advantage of slotting groove.
4. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: said punch is provided with vortex-induced vibration suppression device and takes advantage of the die cavity of inserting convexity and taking advantage of slotting groove.
5. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: a part of vortex-induced vibration suppression device respectively is set on said die and the punch takes advantage of the die cavity of inserting convexity and taking advantage of slotting groove.
6. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: the heating tube on said die and the punch is compiling by manifold trunk into and out of end, and heating agent gets into high-end outflow from the heating tube low side.
7. like claim 1 or 6 described a kind of casting mold for vortex-induced vibration suppression device; It is characterized in that: the heating tube on said die and the punch is supported by the fixed head perforation at two ends; And the welding of the heating tube on the fixed head of an end and said die and the punch is fixing, and the fixed head of the other end is freely to support; Heating tube on said die and the punch is supported by the U-shaped clamp that is fixed on die support and the punch steel pipe in the centre.
8. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: said punch tops is provided with hanger and trimming handle, is connected to punch through hanger and supports.
9. a kind of casting mold for vortex-induced vibration suppression device as claimed in claim 1 is characterized in that: said die and convex mould surface apply polytetrafluorethylecoatings coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102440008A CN101905502B (en) | 2010-08-03 | 2010-08-03 | Casting mold for vortex-induced vibration suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102440008A CN101905502B (en) | 2010-08-03 | 2010-08-03 | Casting mold for vortex-induced vibration suppression device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101905502A CN101905502A (en) | 2010-12-08 |
| CN101905502B true CN101905502B (en) | 2012-08-29 |
Family
ID=43261162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102440008A Active CN101905502B (en) | 2010-08-03 | 2010-08-03 | Casting mold for vortex-induced vibration suppression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101905502B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229224B (en) * | 2011-06-10 | 2014-05-14 | 中国海洋石油总公司 | Forming die system of vortex-induced vibration suppression device in spiral strake form |
| CN102278074A (en) * | 2011-07-13 | 2011-12-14 | 宝鸡石油机械有限责任公司 | Ocean drilling riser with functions of suppressing vortex-induced vibration and protecting against collision |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549417A (en) * | 1993-11-19 | 1996-08-27 | Shell Oil Company | Subsea pipeline shroud |
| CN200951616Y (en) * | 2006-10-08 | 2007-09-26 | 柏飞 | Pouring forming mould of pipeline thermal preservation tile |
| CN101607427A (en) * | 2009-07-27 | 2009-12-23 | 浙江省天台祥和实业有限公司 | The structural improvement of polyurethane elastomer casting machine |
| CN201792447U (en) * | 2010-08-03 | 2011-04-13 | 中国海洋石油总公司 | Casting molding mold of vortex-induced vibration damping device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61220810A (en) * | 1985-03-28 | 1986-10-01 | Toshiba Corp | Manufacture of cast thermosetting resin |
-
2010
- 2010-08-03 CN CN2010102440008A patent/CN101905502B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549417A (en) * | 1993-11-19 | 1996-08-27 | Shell Oil Company | Subsea pipeline shroud |
| CN200951616Y (en) * | 2006-10-08 | 2007-09-26 | 柏飞 | Pouring forming mould of pipeline thermal preservation tile |
| CN101607427A (en) * | 2009-07-27 | 2009-12-23 | 浙江省天台祥和实业有限公司 | The structural improvement of polyurethane elastomer casting machine |
| CN201792447U (en) * | 2010-08-03 | 2011-04-13 | 中国海洋石油总公司 | Casting molding mold of vortex-induced vibration damping device |
Non-Patent Citations (1)
| Title |
|---|
| JP昭61-220810A 1986.10.01 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101905502A (en) | 2010-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101927291B (en) | Pre-forming method for tube hydroforming and device thereof | |
| CN101905502B (en) | Casting mold for vortex-induced vibration suppression device | |
| CN201792447U (en) | Casting molding mold of vortex-induced vibration damping device | |
| CN205463889U (en) | Single circular arc die mould mould of adjustable arbitrary curvature radius | |
| CN102069542A (en) | Insulation cylinder pouring die | |
| CN202144099U (en) | Forming mould system of spiral strake type vortex induced vibration restraining device | |
| CN212070358U (en) | Main oil duct structure of large machine body | |
| CN210996335U (en) | Special steel pipe integrated into one piece mould of support | |
| CN208020479U (en) | A kind of prestressed steel cylinder pipe die | |
| CN211054208U (en) | Demoulding device for double-wall reinforced corrugated pipe | |
| CN212453876U (en) | Super thick wall plate steel tower segment connecting structure with thickness equal to or larger than 80mm of tower column wall plate | |
| CN210647974U (en) | Hydraulic forming die | |
| CN108637210B (en) | Die casting backward extrusion feeding structure and mould that has this structure | |
| CN102126295B (en) | Production method of integrated plastic water outlet pipe and product thereof | |
| CN202377348U (en) | Three-way forming equipment | |
| CN206154499U (en) | A subassembly for reinforced concrete drain pipe mould | |
| CN217531284U (en) | Prevent running thick liquid wire pole mould device | |
| CN205237053U (en) | Package in middle of aluminium liquid | |
| CN108501301A (en) | A kind of easy-to-mount injection mold | |
| CN102229224B (en) | Forming die system of vortex-induced vibration suppression device in spiral strake form | |
| CN215824208U (en) | Tower sand box capable of reducing sand eating amount | |
| CN101823337B (en) | Mold for double-direction bending elbow | |
| CN213500374U (en) | Split type mould | |
| CN220249007U (en) | Ball valve sealing ring | |
| CN217318546U (en) | Cement electric pole production facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Research Institute Patentee after: CNOOC Energy Development Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Research Center Patentee before: CNOOC Energy Development Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: CNOOC Energy Development Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: CNOOC Energy Development Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210809 Address after: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Patentee after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Address before: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC RESEARCH INSTITUTE Co.,Ltd. Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. |