CN108561553A - A kind of sealing ring - Google Patents
A kind of sealing ring Download PDFInfo
- Publication number
- CN108561553A CN108561553A CN201810711956.0A CN201810711956A CN108561553A CN 108561553 A CN108561553 A CN 108561553A CN 201810711956 A CN201810711956 A CN 201810711956A CN 108561553 A CN108561553 A CN 108561553A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- type
- spring
- straightway
- chuck
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Abstract
The present invention relates to a kind of sealing rings, are related to the technical field of sealing technology of working at ultra-low temperature environment, solve the problems, such as to generate centripetal extruding force damage sealing ring due to low temperature environment sealing ring overall shrinkage.The sealing ring includes sealing ring ontology, sealing ring ontology includes straightway sealing ring, changeover portion sealing ring and arc section sealing ring, the changeover portion sealing ring includes changeover portion chuck and the gradual change type spring in the changeover portion chuck, the gradual change type spring includes the V-type groups of springs being arranged alternately successively and H-type helical spring, V-type number of springs of the gradual change type spring in the V-type groups of springs of straightway sealing ring one end is more than the V-type number of springs in the V-type groups of springs of arc section sealing ring one end, the gradual change type spring is less than the spiral number of turns of the H-type helical spring close to arc section sealing ring one end close to the spiral number of turns of the H-type helical spring of straightway sealing ring one end.
Description
Technical field
The present invention relates to the technical field of sealing technology of working at ultra-low temperature environment more particularly to a kind of sealing rings.
Background technology
Sealing ring is widely used in as a kind of conventional machinery part in all trades and professions, is commonly applied to quiet between axis and hole
State seals, and primarily serves the effect of liquidproof or gas leakage.The sealing ring overwhelming majority of prior art production is by elasticity
Body ontology is sealed, and sealing force is mainly to be provided by system itself and sealing ring lip body natural resiliency.With sealing ring
It is widely used, requirement of the different application fields to sealing ring is also different.
Sealing ring is generally sealed using elastomeric body such as rubber in the prior art, i.e., is processed by rubber material
The elasticity of sealing ring itself provides sealing force.However it merely can be because external environment be such as pressed using sealing ring made of rubber material
Power, the variation of temperature or the reasons such as prolonged abrasion and material aging cause the elasticity of sealing ring to reduce or disappear, and then lead
Leakproofness is caused to be deteriorated.In subzero 200 DEG C of ultra-low temperature surroundings, rubber follows the string completely, and the embrittlement of " vitrifying " is presented.When
So, it under above-mentioned ultra-low temperature surroundings, is affected by temperature smaller in view of the elasticity of metal itself, metal sealing method may be used, profit
With metal material enough balancing forces are provided to the elastic shrinkage amount of sealing system.But metal sealing method is used, it is golden in a device
The friction belonged between metal can be such that sealing surface scratches, and reduce the leakproofness of equipment.Therefore, ultra-low temperature surroundings propose sealing ring
More harsh conditions.
Experimental study shows：The shrinking percentage of non-metallic component is ten times of metal parts or so, so metal spring can
There is provided enough balancing forces becomes key.The prior art provides one kind and single layer helical spring being arranged in nonmetallic close circle chuck
Mode made of sealing ring, provide elastic compensating power using built-in helical spring for sealing ring.
Due to sealing ring jacket material（It is general to select polytetrafluoroethylene (PTFE), PTFE）Shrinkage and metal be not at low ambient temperatures
Unanimously（Sealing ring jacket material shrinkage is significantly greater than metal material）, sealing ring is whole to contract, will produce centripetal extruding
Power may cause to damage when serious to sealing ring.And for variable cross-section sealing ring, if using a kind of spring, it will cause
Elastic force active force is unworthy of problem.
Invention content
The object of the present invention is to provide a kind of sealing ring, solve generated due to low temperature environment sealing ring overall shrinkage to
Heart extruding force damages the problem of sealing ring.
The present invention above-mentioned purpose technical scheme is that：
A kind of sealing ring, including sealing ring ontology, the sealing ring ontology include straightway sealing ring, changeover portion sealing ring and circle
Segmental arc sealing ring, the arc section sealing ring are described straight between the straightway sealing ring and the arc section sealing ring
Line segment sealing ring includes straightway chuck and the V-type groups of springs in the straightway chuck, and the V-type groups of springs includes 1
A or multiple V-type springs, the arc section sealing ring include arc section chuck and the H-type spiral in the arc section chuck
Spring, the changeover portion sealing ring include changeover portion chuck and the gradual change type spring in the changeover portion chuck, it is described gradually
Variant spring includes the V-type groups of springs being arranged alternately successively and H-type helical spring, and the gradual change type spring is sealed close to straightway
Enclose the V-type bullet that the V-type number of springs in the V-type groups of springs of one end is more than in the V-type groups of springs of arc section sealing ring one end
Spring quantity, the gradual change type spring are less than close to the spiral number of turns of the H-type helical spring of straightway sealing ring one end close to circular arc
The spiral number of turns of the H-type helical spring of section sealing ring one end.
By using above-mentioned technical proposal, straightway sealing ring uses V-type spring, arc section sealing ring to use H-type spiral
Spring, changeover portion sealing ring use gradual change type spring, make sealing ring ontology ultralow temperature in the environment of, different parts can
Corresponding elastic force is obtained, avoids the problem that sealing ring ontology shrinks and generates centripetal-stress damage sealing ring ontology.
Further, the V-type number of springs of adjacent V-type groups of springs is sealed from close to straightway in the gradual change type spring
Circle one end reduces one successively to close to arc section sealing ring one end, until reducing to zero.
By using above-mentioned technical proposal, the elastic force of V-type groups of springs is from close to straightway sealing ring one end to close circle
Segmental arc sealing ring one end is gradually reduced.
Further, the spiral number of turns of adjacent H-type helical spring are sealed from close to arc section in the gradual change type spring
Circle one end reduces one successively to close to straightway sealing ring one end, until reducing to zero.
By using above-mentioned technical proposal, the elastic force of H-type helical spring from close to arc section sealing ring one end to close
Straightway sealing ring one end is sequentially reduced.
Further, straightway chuck side offers the first trapezoidal holding tank of cross section, first receiving
The trapezoidal cross-section long side of slot is opening, and the opening both sides of first holding tank are relatively set with rib, the V-type bullet
Spring is mounted in first holding tank, and the bending end of the V-type groups of springs and the bottom of first holding tank are inconsistent, institute
The both ends for stating V-type groups of springs are inconsistent respectively at two ribs.
By using above-mentioned technical proposal, V-type groups of springs is connected to by the first appearance holding tank in straightway chuck, and is led to
The both ends for crossing rib and V-type spring contradict, and the clamping of V-type spring is made to stablize.
Further, the straightway chuck is located at the both sides outer wall of opening equipped with the first flange.
By using above-mentioned technical proposal, the first flange and the gland plane of straightway chuck contradict, and make straightway chuck
It is compressed with gland, improves leakproofness.
Further, arc section chuck side offers the second holding tank that cross section is in kidney-shaped, second receiving
The two side of slot is in cambered surface, and the H-type helical spring is set in second holding tank.
By using above-mentioned technical proposal, the surface of H-type helical spring and the cambered surface contact surface of the second holding tank are larger, make
H-type helical spring is more uniformly stressed.
Further, the width of changeover portion chuck side is close from close straightway sealing ring one end to close arc section
Seal one end gradually increases.
By using above-mentioned technical proposal, V-type bullet is clamped in the one end being connect with straightway chuck due to changeover portion chuck
Spring, and H-type helical spring is clamped in the one end being connect with arc section chuck, V-type spring makes changeover portion chuck with H-type helical spring
The position of outwardly convex is different, in order to ensure the consistency of changeover portion sealing ring sealing station, therefore changeover portion chuck
Width gradually increases from close to straightway sealing ring one end to close to arc section sealing ring one end.
Further, the changeover portion chuck is located at the both sides outer wall of opening equipped with the second flange.
By using above-mentioned technical proposal, the second flange is contradicted with gland, and changeover portion sealing ring is bonded closely with gland.
Further, the rounded rectangle of sealing ring ontology.
By using above-mentioned technical proposal, the sealing ring ontology of round rectangle is a kind of variable cross-section sealing ring, it comprises
Straightway sealing ring, changeover portion sealing ring and circular arc sealing ring.
In conclusion the invention has the advantages that：It is the sealing ring ontology cathetus section and fillet of variable cross-section
Section provides different elastic force, and provides the elastic force of gradual change type in the changeover portion of straight section to arc section, solves due to low
Warm environment sealing ring ontology shrinks and leads to the problem of centripetal-stress damage sealing ring ontology.
Description of the drawings
Fig. 1 is the sealed structure chart of arc section sealing ring and straightway sealing ring；
Fig. 2 is the structural schematic diagram of the sealing ring ontology of rounded rectangle；
Fig. 3 is the structural schematic diagram of straightway chuck；
Fig. 4 is the structural schematic diagram of V-type groups of springs；
Fig. 5 is the structural schematic diagram of straightway sealing；
Fig. 6 is the structural schematic diagram of arc section chuck；
Fig. 7 is the structural schematic diagram of H-type helical spring；
Fig. 8 is the structural schematic diagram of arc section sealing ring；
Fig. 9 is the structural schematic diagram of gradual change type spring；
Figure 10 is the structural schematic diagram of changeover portion chuck；
Figure 11 is the structural schematic diagram of changeover portion sealing ring；
Reference numeral：1, sealing ring ontology；11, straightway sealing ring；111, straightway chuck；1111, the first holding tank；
1112, rib；1113, the first flange；112, V-type groups of springs；1121, V-type spring；12, arc section sealing ring；121, arc section
Chuck；1211, the second holding tank；122, H-type helical spring；13, changeover portion sealing ring；131, changeover portion chuck；1311,
Two flanges；132, gradual change type spring.
Specific implementation mode
Below in conjunction with attached drawing, the technical solution of the embodiment of the present invention is described.
As shown in Figure 1, being the sealed structural representation of existing arc section sealing ring 12 and straightway sealing ring 11.This hair
Bright is the design proposed for the sealing ring ontology 1 of variable cross-section.In the present embodiment, as shown in Fig. 2, sealing ring ontology 1 is in circle
Angular moment shape.And in other enforceable embodiments, sealing ring ontology 1 can also be other with the polygon of fillet or this is close
Structure of the present invention can be used by straightway, arc section and set of transitions Cheng Jun in seal ontology 1.
It is the knot of straightway sealing ring 11 and its straightway chuck 111 and 1121 group 112 of V-type spring in conjunction with Fig. 3 to Fig. 5
Structure schematic diagram.
As shown in figure 3, the side of straightway chuck 111 offers the first trapezoidal holding tank 1111 of cross section, this
The trapezoidal cross-section long side of one holding tank 1111 is opening, and the opening both sides of the first holding tank 1111 are integrally formed with opposite
Rib 1112.The both sides outer wall of opening makes straightway chuck integrally formed with the first flange 1113, by the first flange 1113
111 both sides can be compressed with gland.
As shown in figure 4, V-type spring is formed by connecting for 1121 group 112 by one or more V-type springs 1121, multiple V-type springs
1121 two sides difference is in the same plane.
As shown in figure 5, V-type spring is connected to for 1121 group 112 on first holding tank 1111 of straightway chuck 111, V-type bullet
The bottom of the bending end that 1121 group 112 of spring and first holding tank 1111 is inconsistent, the both ends that 1121 group 112 of V-type spring point
It is not inconsistent in two ribs 1112.To make being connected in the first tank of 1121 group 112 of V-type spring stabilization.
It is the structure of arc section sealing ring 12 and its arc section chuck 121 and H-type helical spring 122 in conjunction with Fig. 6 to Fig. 8
Schematic diagram.
As shown in fig. 6, the side of arc section chuck 121 offers the second holding tank 1211 that cross section is in kidney-shaped, this
The two side of two holding tanks 1211 is in cambered surface.
It is H-type helical spring 122 as shown in Figure 7.
As shown in figure 8, H-type helical spring 122 is connected in the second holding tank 1211, the outer wall of H-type helical spring 122 with
Second holding tank 1211 improves H in the two side large area fitting of cambered surface to make H-type helical spring 122 be more uniformly stressed
The anti-pressure ability of type spring.
It is the structure of changeover portion sealing ring 13 and its changeover portion chuck 131 and gradual change type spring 132 in conjunction with Fig. 9 to Figure 11
Schematic diagram.Changeover portion sealing ring 13 is connected between straightway sealing ring 11 and arc section sealing ring 12, in changeover portion chuck
When 131 contractions generate the centripetal force of gradual change, gradual change type spring 132 is the elastic force that changeover portion chuck 131 provides gradual change.
As shown in figure 9, be the structural schematic diagram of gradual change type spring 132, in the present embodiment, with 1121 group 112 of V-type spring
The maximum quantity of middle V-type spring 1121 is for the maximum number of turns of 4 and H-type helical spring 122 is 4.1121 groups of V-type spring
112 replace connection successively with H-type helical spring 122, and the V-type spring 1121 since 1121 group 112 of V-type spring one end counts
Amount gradually decreases 1 to only remaining 1 from 4, and the number of turns of H-type helical spring 122 gradually increases 1 to 4 from 1.At it
In his embodiment, the maximum quantity of V-type spring 1121 and the maximum number of turns of H-type helical spring 122 can be more or less, and
They successively decrease or incremental quantity can be more than 1.
As shown in Figure 10, V-type spring is clamped in the one end being connect with straightway chuck 111 due to changeover portion chuck 131
1121, and H-type helical spring 122 is clamped in the one end being connect with arc section chuck 121, V-type spring 1121 and H-type helical spring
122 keep the position of 131 outwardly convex of changeover portion chuck different, in order to ensure the one of 13 sealing station of changeover portion sealing ring
The sealing station linking in other words of cause property is more coherent, therefore the width of changeover portion chuck 131 is from close to straightway sealing ring 11 1
End gradually increases to close to 12 one end of arc section sealing ring.The both sides outer wall that changeover portion chuck 131 is located at opening is equipped with second
Flange 1311, so that changeover portion chuck 131 is pushed against with both sides gland.
As shown in figure 11, gradual change type spring 132, which is connected in changeover portion chuck 131, forms changeover portion sealing ring 13.Transition
In section sealing ring 13, H-type helical spring 122 counts in other words for one end more than 1121 quantity of V-type spring that 1121 group 112 of V-type spring
Few one end is measured, is connect with straightway sealing ring 11.The few one end of 1121 quantity of V-type spring that 1121 group 112 of V-type spring or
It says one end more than 122 quantity of H-type helical spring, is connect with arc section sealing ring 12.
Operation principle：Since sealing ring ontology 1 is round rectangle, when it at low ambient temperatures when, straightway chuck
111, changeover portion chuck 131 and arc end chuck will produce different size of centripetal extruding force.And V-type spring 1121, gradual change
Formula spring 132 and H-type helical spring 122 just provide different elastic force active forces to offset centripetal extruding force, and gradual change
The elastic force that formula spring 132 provides is gradual from one end of close straightway sealing ring 11 to one end of close arc section sealing ring 12
Become larger, so as to effectively avoid the damage of sealing ring ontology 1.
Claims (9)
1. a kind of sealing ring, including sealing ring ontology (1), it is characterized in that：The sealing ring ontology (1) includes straightway sealing ring
(11), changeover portion sealing ring (13) and arc section sealing ring (12), it is close that the arc section sealing ring (12) is located at the straightway
Between seal (11) and the arc section sealing ring (12), the straightway sealing ring (11) include straightway chuck (111) and
V-type spring (1121) group (112) in the straightway chuck (111), V-type spring (1121) group (112) include 1
A or multiple V-type springs (1121), the arc section sealing ring (12) include arc section chuck (121) and be set to the arc section
H-type helical spring (122) in chuck (121), the changeover portion sealing ring (13) include changeover portion chuck (131) and are set to
Gradual change type spring (132) in the changeover portion chuck (131), the gradual change type spring (132) includes being arranged alternately successively
V-type spring (1121) group (112) and H-type helical spring (122), the gradual change type spring (132) is close to straightway sealing ring
(11) V-type spring (1121) quantity in V-type spring (1121) group (112) of one end is more than close to arc section sealing ring (12) one
V-type spring (1121) quantity in V-type spring (1121) group (112) at end, the gradual change type spring (132) are close close to straightway
The spiral number of turns of the H-type helical spring (122) of seal (11) one end are less than the H-type spiral close to arc section sealing ring (12) one end
The spiral number of turns of spring (122).
2. a kind of sealing ring according to claim 1, it is characterized in that：Adjacent V-type bullet in the gradual change type spring (132)
V-type spring (1121) quantity of spring (1121) group (112) is close from the extremely close arc section close to straightway sealing ring (11) one end
Seal (12) one end reduces one successively, until reducing to zero.
3. a kind of sealing ring according to claim 1, it is characterized in that：Adjacent H-type spiral shell in the gradual change type spring (132)
Revolve the spiral number of turns of spring (122) from close to arc section sealing ring (12) one end to close to straightway sealing ring (11) one end according to
It is secondary to reduce one, until reducing to zero.
4. a kind of sealing ring according to claim 1, it is characterized in that：Straightway chuck (111) side offers cross
The trapezoidal cross-section long side of trapezoidal the first holding tank (1111) in section, first holding tank (1111) is opening, described
The opening both sides of first holding tank (1111) are relatively set with rib (1112), and V-type spring (1121) group (112) is set to
In first holding tank (1111), the bending end of V-type spring (1121) group (112) and first holding tank (1111)
Bottom it is inconsistent, the both ends of V-type spring (1121) group (112) are inconsistent respectively at two ribs (1112).
5. a kind of sealing ring according to claim 1, it is characterized in that：The straightway chuck (111) is located at opening
Both sides outer wall is equipped with the first flange (1113).
6. a kind of sealing ring according to claim 1, it is characterized in that：Arc section chuck (121) side offers cross
Section is in the second holding tank (1211) of kidney-shaped, and the two side of second holding tank (1211) is in cambered surface, the H-type helical spring
(122) it is set in second holding tank (1211).
7. a kind of sealing ring according to claim 1, it is characterized in that：The width of changeover portion chuck (131) side from
Gradually increase to close to arc section sealing ring (12) one end close to straightway sealing ring (11) one end.
8. a kind of sealing ring according to claim 1, it is characterized in that：The changeover portion chuck (131) is located at opening
Both sides outer wall is equipped with the second flange (1311).
9. a kind of sealing ring according to claim 1, it is characterized in that：The rounded rectangle of the sealing ring ontology (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711956.0A CN108561553B (en) | 2018-06-29 | 2018-06-29 | Sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711956.0A CN108561553B (en) | 2018-06-29 | 2018-06-29 | Sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108561553A true CN108561553A (en) | 2018-09-21 |
| CN108561553B CN108561553B (en) | 2020-06-16 |
Family
ID=63555095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810711956.0A Active CN108561553B (en) | 2018-06-29 | 2018-06-29 | Sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108561553B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869552A (en) * | 2019-04-19 | 2019-06-11 | 中国航发湖南动力机械研究所 | A kind of air pipe line attachment device |
| CN110748645A (en) * | 2019-10-28 | 2020-02-04 | 西安近代化学研究所 | Sealing device suitable for corrosive liquid |
| CN113847491A (en) * | 2021-09-29 | 2021-12-28 | 常州三众弹性技术有限公司 | Flange sealing structure, application thereof and sealing performance detection method |
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| CN2149522Y (en) * | 1993-02-13 | 1993-12-15 | 于静 | Automatic sealing ring |
| CN2739428Y (en) * | 2004-10-12 | 2005-11-09 | 蓝喧实业有限公司 | Gap-compensating shaft seal |
| CN101270811A (en) * | 2008-04-24 | 2008-09-24 | 景纪荣 | Spring backbone sealing ring |
| CN201705922U (en) * | 2010-06-23 | 2011-01-12 | 韩春洋 | Metal spring embedded seal box |
| CN202719137U (en) * | 2012-06-20 | 2013-02-06 | 优华劳斯汽车系统（上海）有限公司 | Oil sealing structure for engine |
| CN103791096A (en) * | 2014-02-27 | 2014-05-14 | 北京裕泰行新材料科技有限公司 | Seal ring |
| CN104500737A (en) * | 2015-01-06 | 2015-04-08 | 苏州道森阀门有限公司 | Spring type energy storing metal sealing ring |
| CN206754351U (en) * | 2017-04-25 | 2017-12-15 | 凯氟隆（厦门）密封件有限公司 | A kind of resistance to 196 DEG C of cryogenic valve sealing rings of single-piston |
| CN208474494U (en) * | 2018-06-29 | 2019-02-05 | 四川日机密封件股份有限公司 | A kind of sealing ring |
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2018
- 2018-06-29 CN CN201810711956.0A patent/CN108561553B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2149522Y (en) * | 1993-02-13 | 1993-12-15 | 于静 | Automatic sealing ring |
| CN2739428Y (en) * | 2004-10-12 | 2005-11-09 | 蓝喧实业有限公司 | Gap-compensating shaft seal |
| CN101270811A (en) * | 2008-04-24 | 2008-09-24 | 景纪荣 | Spring backbone sealing ring |
| CN201705922U (en) * | 2010-06-23 | 2011-01-12 | 韩春洋 | Metal spring embedded seal box |
| CN202719137U (en) * | 2012-06-20 | 2013-02-06 | 优华劳斯汽车系统（上海）有限公司 | Oil sealing structure for engine |
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| CN104500737A (en) * | 2015-01-06 | 2015-04-08 | 苏州道森阀门有限公司 | Spring type energy storing metal sealing ring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869552A (en) * | 2019-04-19 | 2019-06-11 | 中国航发湖南动力机械研究所 | A kind of air pipe line attachment device |
| CN110748645A (en) * | 2019-10-28 | 2020-02-04 | 西安近代化学研究所 | Sealing device suitable for corrosive liquid |
| CN110748645B (en) * | 2019-10-28 | 2022-02-22 | 西安近代化学研究所 | Sealing device suitable for corrosive liquid |
| CN113847491A (en) * | 2021-09-29 | 2021-12-28 | 常州三众弹性技术有限公司 | Flange sealing structure, application thereof and sealing performance detection method |
| CN113847491B (en) * | 2021-09-29 | 2022-12-23 | 常州三众弹性技术有限公司 | Flange sealing structure, application thereof and sealing performance detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108561553B (en) | 2020-06-16 |
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Address after: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. eight Applicant after: Zhongmi Holding Co., Ltd Address before: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. eight Applicant before: Sichuan Sunny Seal Co., Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |