CN103016742A - High-pressure-resistant mechanical sealing device - Google Patents
High-pressure-resistant mechanical sealing device Download PDFInfo
- Publication number
- CN103016742A CN103016742A CN2013100006200A CN201310000620A CN103016742A CN 103016742 A CN103016742 A CN 103016742A CN 2013100006200 A CN2013100006200 A CN 2013100006200A CN 201310000620 A CN201310000620 A CN 201310000620A CN 103016742 A CN103016742 A CN 103016742A
- Authority
- CN
- China
- Prior art keywords
- throw
- out collar
- ring
- axial
- seat
- 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.)
- Granted
Links
Images
Landscapes
- Mechanical Sealing (AREA)
Abstract
The invention provides a high-pressure-resistant mechanical sealing device. The high-pressure-resistant mechanical sealing device comprises a moving ring and a static ring, wherein the moving is axially fixed and can rotate with a shaft; the static ring is arranged opposite to the moving ring through a shaft end sealing surface and can axially float; and the static ring and a pushing ring seat form floating support through a pushing ring and an elastic structure which are in contact with the non-sealed axial end of the static ring. The pushing ring adopts a cylindrical structure in which a radial extending plate sheet is arranged on the peripheral part adjacent to an axial end; the extending end surface of the cylindrical structure adjacent to the plate sheet is in contact with the axial end surface of the static ring; and the pushing ring seat adopts a cylindrical structure with step holes including an axial central hole. The outer cylindrical surface of the cylindrical structure of the pushing ring is in clearance fit with the inner hole surface of a central hole of a radial annular plane structure of the pushing ring seat; and a sealing ring is arranged at the fitting part. Through the adoption of the high-pressure-resistant mechanical sealing device provided by the invention, the influences of the deformation of the pushing ring on the floating property and the conical deformation of the pushing ring seat guide cylinder surface are obviously reduced, the concentration states of stresses in various positions in the pushing ring seat with the traditional structure are greatly reduced, the pressure resistance and the sealing stability are obviously improved, the service life is obviously prolonged, and convenience in finishing parts is provided.
Description
Technical field
The present invention relates to a kind of mechanical seal device of rotating equipment axial end, a kind of high voltage bearing axial end mechanical seal device particularly can be used for the axial end sealing of the rotation class machines such as compressor, decompressor, seperator, pump, reactor of various types.
Background technique
A kind of typical mechanical seal structure as shown in Figure 1, comprise that axial restraint also can be with the rotating ring (1) of axle (20) rotation, and being oppositely arranged and can doing the irrotational stationary ring (2) of axial float through axle head sealing surface and rotating ring (1), the throw-out collar that stationary ring (2) then arranges through contacting with its non-tight axial end and elastic structure (6) floating support are between the throw-out collar seat.One " annular groove " formula structure that inboard tubular perisporium (18) and outside tubular perisporium (29) and radial ring plane structure form of serving as reasons of throw-out collar seat wherein; The throw-out collar that substantially is single radial plane structure (4) that directly contacts with the end face of stationary ring, then with its inner hole surface Spielpassung on the outer circumferential face of throw-out collar seat inside cylindrical structure (18).As the rotating ring axial restraint of sealing core component, the stationary ring axial float, by its axially relative seal face directly contact or the sealing of little gap separation realization medium.Practice shows that the stability of sealing and the pressure of sealed medium are closely related.When the pressure of sealing medium was low, the structural design of sealing, craft precision, matching requirements, material selection etc. had larger leeway, and can satisfy well the field condition of sealed unit, guarantee the stable operation that seals; But along with the rising of sealed medium pressure, the series of parameters such as the leakage rate of sealing, distortion, end face frictional wear are all worsening.In fact, when pressure medium was higher than 15MPa, sealing condition can sharply worsen, and had been difficult to effectively improve at present the performance of sealing from the general treatment measures of the aspects such as structure, technique, assembling, material.
Find through theoretical calculation and test, the face deformation of stationary ring is to cause that the seal leakage amount increases, the one of the main reasons of end face frictional wear aggravation, and the throw-out collar that links to each other with stationary ring and throw-out collar seat are related to constrained, force-bearing situation and the floatability of stationary ring, and these all can affect the face deformation of stationary ring to a certain extent.Because in the higher situation of pressure medium, it is large that throw-out collar and throw-out collar seat can amount of deformation occur, localized stress is high, even plastic deformation, localized cracks etc. occur, causes seal failure.The problem of its existence is mainly manifested in when pressure medium is higher:
1) throw-out collar radially compressive strain and increase perpendicular to circumferential torsional deflection.Wherein cooperating of the circumferential outer surface of the radially excessive compressive strain inner hole surface that may affect throw-out collar and the inboard tubular perisporium of throw-out collar seat, cause the floatability variation of throw-out collar; Torsional deflection increases the constrained that then may make its end face that contacts with stationary ring change stationary ring;
2) distortion of throw-out collar seat is large, stress raisers.The medial and lateral tubular perisporium that is connected with the radial ring plane all is cantilever-shaped structure, distortion is large under the effect of high-pressure medium pressure, particularly crucial inboard tubular peripheral wall structure can present the distortion of nearly taper, but the sealability of the floatability of appreciable impact throw-out collar and seal ring; And two corner portion (16,17) that the radial ring plane is connected with medial and lateral tubular perisporium also all exist the stress of highly significant to concentrate, and plastic deformation or localized cracks may occur;
3) because the existence of outside tubular peripheral wall structure makes the external cylindrical surface of inboard tubular perisporium crucial in the throw-out collar seat be not easy to fine finishing, finally can affect the floatability of throw-out collar.
Therefore, appropriate design throw-out collar and throw-out collar seat are important keys of elevating mechanism sealing stability.
Summary of the invention
Given this, the invention provides a kind of throw-out collar and mechanical seal device of throw-out collar seat, particularly a kind of mechanical seal device with high pressure resistant property that improves structure that adopt.
The basic structure of the high pressure resistant mechanical seal device of the present invention, include equally axial restraint and the rotating ring that can rotate with the axis and be oppositely arranged the irrotational stationary ring that also can make axial float through axle head sealing surface and rotating ring, throw-out collar and elastic structure and the throw-out collar seat floating support of stationary ring through contacting with its non-tight axial end and arranging.Wherein, said throw-out collar by elastic structure and throw-out collar seat floating support, for being provided with the radially tubular structure of abduction disc at the peripheral part adjacent with an axial end, this tubular structure overhanging end face adjacent with disc contacts with the axial end of stationary ring; The throw-out collar seat is the tubular structure with the shoulder hole that comprises axial center hole.The tubular structure of throw-out collar is with the center hole inner hole surface Spielpassung of its external cylindrical surface and throw-out collar seat radial ring plane structure, and is provided with seal ring at its matching part.
Because the throw-out collar structure in the above-mentioned seal arrangement of the present invention has adopted and a kind ofly has been provided with the radially tubular structure of abduction disc at the adjacent peripheral part of one axial end, and only with disc the overhanging end face of this tubular structure of neighbour contact with the non-tight axial end of stationary ring, disc part then axially retreats and only adjacent with stationary ring, therefore even disc produces the floatability that distortion can the appreciable impact stationary ring yet, and also be more convenient for the fine finishing of the tubular structure external cylindrical surface that is used in the throw-out collar cooperating with the throw-out collar seat is conducive to ensure the floatability of throw-out collar.Simultaneously, with reducing of contacted this tubular structure end face of stationary ring axial end, equally also more be conducive to its processing and obtain enough surface configuration precision, guarantee and improve the sealability of its surface of contact.Because the change of fit system between this throw-out collar of the present invention and throw-out collar seat, corresponding throw-out collar seat is the corresponding tubular structure that only has outside tubular perisporium that changed into then, and no longer be in as conventional construction, having simultaneously, " annular groove " formula structure of outside tubular perisporium, thereby be conducive to reduce pressure medium to the action range of throw-out collar seat, the distortion of throw-out collar seat also is reduced to the radial expansion distortion that only can produce the outside tubular peripheral wall structure that the throw-out collar floatability is not made significant difference, and/or with the torsional deflection of the radial ring plane structure of axial center hole, and only can in the throw-out collar seat, form the position that a stress is concentrated, the stress raisers of throw-out collar seat are significantly reduced.
On the said structure basis, high pressure resistant mechanical seal device of the present invention can also be separately or the combination in any mode optimal way further selecting to take comprise:
Be arranged in the tubular structure of the axial both sides of disc in the said throw-out collar, the diameter of the outer circumferential face that the outer circumferential face diameter that contacts distolateral overhanging end with stationary ring cooperates greater than the center hole endoporus with throw-out collar seat radial ring plane structure, make that pressure medium (Pascal) produces make throw-out collar to the power of stationary ring direction greater than the power that makes its separation, and to make its direction of making a concerted effort be to push throw-out collar to floating ring, thereby be conducive to guarantee floating ring to the tracing ability of throw-out collar, improved and prevent the stable and reliable of seal failure that pressure medium makes throw-out collar separate with floating ring to cause;
The axial thickness of disc internal side diameter is conducive to improve the non-deformability of disc part greater than the axial thickness of its outside diameter in the said throw-out collar; Further,
The axial thickness of disc is that cascade increases progressively by outer radial periphery is centripetal in the said throw-out collar;
The internal side diameter of said and the overhanging end face of the contacted throw-out collar tubular structure of stationary ring axial end has the taper hole face structure of interior receipts.Generally speaking, remaining 1 ~ 20 millimeter for the radius side width with the overhanging end face of contacted this throw-out collar tubular structure of the axial end of stationary ring all allows, be set to said interior receipts taper hole face putting its internal side diameter position before this, suitably reduced the radial width of itself and stationary ring counterface, can guarantee to make it be easier to process and obtain enough surface configuration precision under the prerequisite that unlikely surface of contact leaks;
At the disc root that is positioned at throw-out collar tubular structure overhanging end one side, be provided with can with the contacted seal ring of stationary ring end face;
On said throw-out collar tubular structure external cylindrical surface, be provided with wear-resistant material layer at the position that can match with throw-out collar seat center hole inner hole surface at least, be beneficial to improve working life.
By the corner portion to the outside tubular perisporium of the throw-out collar seat in the above-mentioned seal arrangement of the present invention and radial ring plane structure, the inner hole surface external angle of radial ring plane structure center hole, and the external angle of the external cylindrical surface of throw-out collar tubular structure, with the radial ring plane of " annular groove " type throw-out collar seat in traditional mechanical seal device with in, two corner portion (16 between the tubular perisporium of the outside, 17) and the stress in the overhanging end bight of inboard tubular perisporium external cylindrical surface and deformation gauge calculation and Analysis show, throw-out collar of the present invention has less amount of deformation and distortion cone angle when radial deformation occurs, the rear cone angle that produces of distortion is about 0.4 ~ 1 "; the radially relative deformation at its axial two ends is about 2 ~ 5 microns; and the distortion of the inboard tubular peripheral wall structure external cylindrical surface that play the guiding role in traditional mechanical seal is more inhomogeneous; and the cone angle that produces after the distortion is about 6 ~ 25 ", axial two ends radially relative deformation are about 30 ~ 130 microns; This corner stress raiser has the less extreme value of doing one's utmost in the throw-out collar seat of the present invention, the corner (16) of more traditional mechanical seal outside tubular perisporium has reduced by 5 ~ 15% approximately, and the maximum stress of the inner hole surface external angle of throw-out collar seat center hole of the present invention only is 3 ~ 11% of the inboard tubular perisporium corner (17) of traditional mechanical seal maximum stress.Therefore, the mechanical seal device of said structure form of the present invention can reduce the taper distortion of the cylindrical fit face that play the guiding role between throw-out collar and throw-out collar seat well, and has significantly reduced the stress collected state in the throw-out collar seat.And be more convenient for the manufacturing at each fitting surface position that precision machining needs.
Below in conjunction with the embodiment by the accompanying drawing illustrated embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.Do not breaking away from the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Description of drawings
Fig. 1 is a kind of structural representation of typical conventional construction mechanical seal device.
Fig. 2 is a kind of structural representation of the high pressure resistant mechanical seal device of the present invention.
Fig. 3 is the structure for amplifying schematic representation of throw-out collar seat among Fig. 2.
Fig. 4 is that the K of throw-out collar structure shown in Figure 3 is to the local state schematic representation.
Fig. 5 is the another kind of structural representation of the high pressure resistant mechanical seal device of the present invention.
Embodiment
Fig. 2 ~ shown in Figure 4 is a kind of basic structure form of the high pressure resistant mechanical seal device of the present invention, including axial restraint also can be with the rotating ring 1 of axle 20 rotations, with conventional elastic structures 6 and throw-out collar seat 5 floating supports such as the irrotational stationary ring 2 that is oppositely arranged and can does axial float through axle head sealing surface and rotating ring 1, the throw-out collar that stationary ring 2 arranges through contacting with its non-tight axial end and springs.Said by elastic structure 6 this throw-out collar with throw-out collar seat 5 floating supports, for be provided with the radially tubular structure 10 of abduction disc 4 at the peripheral part adjacent with an axial end.Wherein, the axial thickness of the internal side diameter of disc 4 is greater than the axial thickness of its outside diameter, and increased progressively to internal side diameter by outside diameter for ladder 7 formulas.This tubular structure 10 overhanging end faces 13 adjacent with disc 4 contact with the axial end of stationary ring 2,3 opposing end surfaces with stationary ring 2 in this side end face of disc 4 are adjacent, and at the root of this end face side of disc 4, through corresponding groove be provided with can with the contacted seal ring 81 of the opposing end surface of stationary ring 2.Simultaneously, at the tubular structure 10 that is arranged in disc 4 axial both sides, contact the diameter of outer circumferential face 12 of distolateral overhanging end with stationary ring 2 greater than opposite side, the diameter of the outer circumferential face 11 that namely cooperates with the center hole endoporus of throw-out collar seat 5 radial ring plane structures.
Throw-out collar seat 5 is the tubular structure 19 with the shoulder hole that comprises axial center hole.Throw-out collar is with the external cylindrical surface 11 of its tubular structure 10 and the center hole inner hole surface Spielpassung of throw-out collar seat 5 radial ring plane structures, and can be provided with such as the wear-resistant material layers such as diamond coatings or ceramic coating 9 with the external cylindrical surface position that the center hole inner hole surface of throw-out collar seat 5 matches at least, between its matching part, also be provided with seal ring 82 through corresponding groove structure.With the internal side diameter of the tubular structure 10 overhanging end faces of the contacted throw-out collar of stationary ring 2 axial ends, for having taper hole face 14 structures of interior receipts.On the inboard sagittal plane of the radial ring plane structure of throw-out collar seat 5, can also be in the usual way along the position structure that several circumferentially evenly are set be used for arranging the forms such as groove of the elastic structures 6 such as spring.
Fig. 5 is the another kind of structural type of the high pressure resistant mechanical seal device of the present invention.The axial thickness that is embodied in disc 4 in the throw-out collar with the main difference of Fig. 2 structure is for being increased progressively the axial thickness that becomes its root greater than the form of its outer radial periphery thickness with cascade merely to internal side diameter by outside diameter, be not provided with again can with the contacted seal ring 81 of the opposing end surface of stationary ring 2.
Various structures shown in the figure have only related to the form of single-stage sealing.In actual use, the total arrangement of seal arrangement of the present invention can have multiple pattern as required, such as mechanical single seal, double seals, tandem seal (more than the two-stage), the series connection middle labyrinth of band (more than the two-stage) etc., and can be further form combined labyrinth and carbon gland with other seal style such as floating-ring seal, carbon ring seal, labyrinth seal, those skilled in the art all can be according to the present invention the content of above-mentioned seal arrangement be achieved.
Claims (7)
1. high pressure resistant mechanical seal device, comprise that axial restraint also can be with the rotating ring (1) of axle (20) rotation, with the irrotational stationary ring (2) that is oppositely arranged and can does axial float through axle head sealing surface and rotating ring (1), the throw-out collar that stationary ring (2) arranges through contacting with its non-tight axial end and elastic structure (6) and throw-out collar seat (5) floating support, it is characterized in that said by the throw-out collar of elastic structure (6) with throw-out collar seat (5) floating support, for be provided with the radially tubular structure (10) of abduction disc (4) at the peripheral part adjacent with an axial end, this tubular structure (10) the overhanging end face (13) adjacent with disc (4) contacts with the axial end of stationary ring (2), throw-out collar seat (5) is the tubular structure (19) with the shoulder hole that comprises axial center hole, the tubular structure of throw-out collar (10) is with the center hole inner hole surface Spielpassung of its external cylindrical surface (11) and throw-out collar seat (5) radial ring plane structure, and is provided with seal ring (82) at its matching part.
2. high pressure resistant mechanical seal device as claimed in claim 1, it is characterized in that being arranged in the said throw-out collar the axially tubular structure (10) of both sides of disc (4), contact the diameter of the outer circumferential face (11) that the diameter of the outer circumferential face (12) of distolateral overhanging end cooperates greater than the center hole endoporus with throw-out collar seat (5) radial ring plane structure with stationary ring (2).
3. high pressure resistant mechanical seal device as claimed in claim 1 is characterized in that the axial thickness of internal side diameter of disc in the said throw-out collar (4) is greater than the axial thickness of its outside diameter.
4. high pressure resistant mechanical seal device as claimed in claim 3 is characterized in that the axial thickness of disc in the said throw-out collar (4) is for to be increased progressively to internal diameter side steps formula by outside diameter.
5. high pressure resistant mechanical seal device as claimed in claim 1 is characterized in that the internal side diameter with the overhanging end face of tubular structure (10) of the contacted throw-out collar of stationary ring (2) axial end has taper hole face (14) structure of interior receipts.
6. high pressure resistant mechanical seal device as claimed in claim 1 is characterized in that at disc (4) root that is positioned at the tubular structure of throw-out collar (10) overhanging end one side, be provided with can with the contacted seal ring of stationary ring (2) end face (81).
7. high pressure resistant mechanical seal device as claimed in claim 1 is characterized in that on throw-out collar tubular structure (10) external cylindrical surface, is provided with wear-resistant material layer (9) at the position that can match with throw-out collar seat (5) center hole inner hole surface at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310000620.0A CN103016742B (en) | 2013-01-04 | 2013-01-04 | High-pressure-resistant mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310000620.0A CN103016742B (en) | 2013-01-04 | 2013-01-04 | High-pressure-resistant mechanical sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103016742A true CN103016742A (en) | 2013-04-03 |
| CN103016742B CN103016742B (en) | 2015-04-22 |
Family
ID=47965673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310000620.0A Active CN103016742B (en) | 2013-01-04 | 2013-01-04 | High-pressure-resistant mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103016742B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654653A (en) * | 2017-09-15 | 2018-02-02 | 浙江鲁溪密封件有限公司 | A kind of mechanically-sealing apparatus |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4933614B1 (en) * | 1968-06-05 | 1974-09-07 | ||
| US3921819A (en) * | 1974-07-26 | 1975-11-25 | Kidde & Co Walter | Boom latch mechanism |
| DE3722110A1 (en) * | 1987-07-03 | 1989-01-12 | Burgmann Dichtungswerk Feodor | THE ARRANGEMENT OF A GAS LUBRICATED MECHANICAL SEAL AND SEAL ARRANGEMENT FOR A SHAFT |
| EP0470409A1 (en) * | 1990-07-18 | 1992-02-12 | Ebara Corporation | Noncontacting face seal |
| CA2126779A1 (en) * | 1993-06-28 | 1994-12-29 | Glenn G. Pecht | Non-contacting, gap-type seal having a ring with a patterned microdam seal face |
| CN1828098A (en) * | 2006-01-27 | 2006-09-06 | 浙江工业大学 | Non-contact mechanical end face sealing structure |
| CN202992174U (en) * | 2013-01-04 | 2013-06-12 | 四川日机密封件股份有限公司 | High-pressure-resisting mechanical sealing device |
-
2013
- 2013-01-04 CN CN201310000620.0A patent/CN103016742B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4933614B1 (en) * | 1968-06-05 | 1974-09-07 | ||
| US3921819A (en) * | 1974-07-26 | 1975-11-25 | Kidde & Co Walter | Boom latch mechanism |
| DE3722110A1 (en) * | 1987-07-03 | 1989-01-12 | Burgmann Dichtungswerk Feodor | THE ARRANGEMENT OF A GAS LUBRICATED MECHANICAL SEAL AND SEAL ARRANGEMENT FOR A SHAFT |
| EP0470409A1 (en) * | 1990-07-18 | 1992-02-12 | Ebara Corporation | Noncontacting face seal |
| CA2126779A1 (en) * | 1993-06-28 | 1994-12-29 | Glenn G. Pecht | Non-contacting, gap-type seal having a ring with a patterned microdam seal face |
| CN1828098A (en) * | 2006-01-27 | 2006-09-06 | 浙江工业大学 | Non-contact mechanical end face sealing structure |
| CN202992174U (en) * | 2013-01-04 | 2013-06-12 | 四川日机密封件股份有限公司 | High-pressure-resisting mechanical sealing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654653A (en) * | 2017-09-15 | 2018-02-02 | 浙江鲁溪密封件有限公司 | A kind of mechanically-sealing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103016742B (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107830008B (en) | Universal double-acting air-floatation friction-free cylinder | |
| CN202992174U (en) | High-pressure-resisting mechanical sealing device | |
| CN201475035U (en) | Mechanical seal device of rotating shaft used for pump | |
| CN103016742B (en) | High-pressure-resistant mechanical sealing device | |
| CN204628557U (en) | For integrated type rotating ring and the mechanical seal device thereof of mechanical seal | |
| CN103758690A (en) | Rolling-friction tilt cylinder hydraulic motor | |
| CN105257934A (en) | End face sealing structure used for rotary compensator and rotary compensator | |
| CN202811847U (en) | Radial hydrodynamic sliding bearing | |
| CN203130509U (en) | Disk spring structure of host of screw air compressor | |
| CN105526452A (en) | High-temperature-resistant and high-pressure-resistant rotary compensator | |
| CN210920119U (en) | Rotary dynamic sealing device of centrifugal machine | |
| CN208858572U (en) | A kind of integral type sectional multistage pump configuration | |
| CN108980491B (en) | Damping formula rotary joint structure | |
| CN105750013A (en) | Novel grinding roller with quick-changing shell and method of changing quick-changing shell thereof | |
| CN203348319U (en) | Long cylindrical full complete roller bearing provided with aligning housing ring and used for continuous casting machine | |
| CN101560982B (en) | Annular balancing piston | |
| CN209458176U (en) | Compressor axle head air film seal structure | |
| CN204656900U (en) | A kind of vibrator with Novel bearing structure | |
| CN219388447U (en) | Spacing ring | |
| CN204003975U (en) | A kind of dynamic and static pressure composite air-bearing | |
| CN208935390U (en) | A kind of mechanical seal being easily installed | |
| CN114321382B (en) | Contact dynamic seal structure suitable for oil circuit between rotating piece and static piece | |
| CN202659484U (en) | Flexible shock-resistance mechanical sealing device | |
| CN208885781U (en) | A kind of abrasion resistant type combination bearing | |
| CN216241701U (en) | Airtight positioning guide mechanism capable of bearing radial load |
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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee after: Zhongmi Holding Co., Ltd Address before: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee before: Sichuan Sunny Seal Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |