CN106090342B - The check-valves of anti-low-flow vibration - Google Patents
The check-valves of anti-low-flow vibration Download PDFInfo
- Publication number
- CN106090342B CN106090342B CN201610768857.7A CN201610768857A CN106090342B CN 106090342 B CN106090342 B CN 106090342B CN 201610768857 A CN201610768857 A CN 201610768857A CN 106090342 B CN106090342 B CN 106090342B
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- Prior art keywords
- vibrationproof
- valves
- check
- valve
- force side
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- 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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- 238000009825 accumulation Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/06—Means to prevent accidental or unauthorised actuation using a removable actuating or locking member, e.g. a key
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
The present invention provides a kind of check-valves of anti-low-flow vibration, when the input end of medium channel has the inflow of non-targeted moving gaseouse medium, this when, the medium can generate an active force to flap part, have the tendency that opening flap part, and because being additionally arranged vibrationproof component, vibrationproof component applies the vibrationproof power opposite with non-targeted moving gaseouse medium force direction to flap part, prevent flap from vibrating, rather than method processing abrading section is rethought after waiting flaps part to wear for a long time because of vibration, flap is solved from root and the contact site of valve seat is worn because of vibration, the problem of leakage.
Description
Technical field
The present invention relates to a kind of valves, more specifically to a kind of check-valves of anti-low-flow vibration.
Background technique
The check-valves of common anti-low-flow vibration is usually as shown in Figure 1, include valve deck, valve body, valve seat, flap, flap
Lid, valve rod, valve deck are set to body top, and conflict is connected to meal and does the two shape when valve seat is set in valve body and flap is closed
At sealing, flap setting is fixed on rocking bar by valve clack cover, and rocking bar is hingedly connected on valve body by valve rod, and valve rod is usually
It is intracorporal to be placed in valve.The active force that the intracorporal input end of valve has fluid media (medium) (such as gas medium, liquid medium) to flow into and generate
When sufficiently large, flap is opened, to realize flowing transmission of the fluid media (medium) from input end to outlet end.
The check-valves of this traditional anti-low-flow vibration exists as following drawbacks: when input end has a small amount of non-targeted air-flow
Medium enters, and generates certain active force to flap but the active force is insufficient to allow flap to open again, flap will generate at this time
Certain vibration and make a noise, meanwhile, if flap continually be in this state, will lead to the contact site of flap and valve seat
Leakage can be generated because of abrasion.
Those skilled in the art's common practice is exactly that sealing ring is arranged in the contact site of flap and valve seat or increases valve
The wearability of the contact site, but these ways cannot all solve the problems, such as from root, only extend the time for leading to abrasion, most
What whole flap and valve seat still can be leaked because of the environment for being chronically at such a vibration, friction.
Summary of the invention
The purpose of the invention is to provide a kind of check-valves of anti-low-flow vibration, prevent the input end of check-valves from having non-
Flap is caused to vibrate when target airflow medium enters, the contact site of solution flap and valve seat is due to vibration from root
There is the problem of abrasion, leakage.
A kind of check-valves of anti-low-flow vibration, including valve body and opening/closing component, be equipped in the valve body band input end and
The medium channel of outlet end, the opening/closing component are placed in medium channel close to input end and for controlling inlet end and an outlet end
Conducting or partition；The opening/closing component includes the valve rod being arranged on valve body and the flap part with valve rod articulated connection, institute
It states valve rod at least one end and is pierced by valve body composition force side, the force side, which is connected, vibrationproof component, closes when flap part is in
Conjunction state and have non-targeted moving gaseouse medium to flap part generate active force when, the vibrationproof component applies flap part by force side
Add vibrationproof power, the vibrationproof power is opposite with non-targeted moving gaseouse medium force direction.
By using above-mentioned technical proposal, when the input end of medium channel has the inflow of non-targeted moving gaseouse medium, this when
An active force can be generated to flap part by waiting the medium, have the tendency that opening flap part, and because being additionally arranged vibrationproof component, prevent
The component that shakes applies the vibrationproof power opposite with non-targeted moving gaseouse medium force direction to flap part, prevents flap from vibrating, and
It is not to rethink method processing abrading section after equal flaps part is worn because of vibration for a long time, connecing for flap and valve seat is solved from root
Contact portion position occurs the problem of abrasion, leakage because of vibration.
Preferably, the vibrationproof component includes energy accumulation member, and the energy accumulation member includes the torsional spring for being set in force side, divides
It is not fixedly connected with the axle cap and fixing piece at torsional spring both ends.
By using above-mentioned technical proposal, vibrationproof component not merely only simply applies a vibrationproof power, more can be right
The energy generated in the course of work carries out energy storage, when having non-targeted moving gaseouse medium effect flap part, can apply at any time to flap part
Add vibrationproof power.
Preferably, hinge is connected with fixing sleeve between the force side and torsional spring, and fixing sleeve and axle cap, force side are fixed
Connection.
By using above-mentioned technical proposal, torsional spring is not direct to be connect with the force side of valve body, but is realized by fixing sleeve
The connection of torsional spring and force side, primarily to being not merely set in outside force side in view of torsional spring, it is also necessary to its both ends into
Row is fixed, in order to keep stable connection between all parts reliable, structurally reasonable, so it is additionally arranged fixing sleeve.
Preferably, the force side is equipped with shield, and energy accumulation member is placed in shield.
By using above-mentioned technical proposal, energy storage member is protected, prevents from changing energy storage member state because of maloperation
The case where occur.
Preferably, the vibrationproof component includes biasing member and locking member, the force side of the biasing member and valve rod
It is connected and the opening and closing with ovable valve stem control valve valve part, the locking member is fixed on valve body and mutually interlocks with biasing member
Tightly or it is mutually disengaged.
By using above-mentioned technical proposal, when locking member and biasing member are mutually disengaged, flap unlatching can control, it is real
The conducting of existing input end and outlet end, so that destination media flows in medium channel；Locking member is mutually interlocked with biasing member
When tight, it is ensured that biasing member effectively can carry out vibrationproof force to flap part by valve body.
Preferably, the biasing member includes the pre- immediately disk and extension bar being fixedly connected, and immediately disk and force side are solid in advance
Fixed connection.
By using above-mentioned technical proposal, operator is exerted a force by extension bar, and extension bar passes through pre- immediately disk, force
End applies vibrationproof power to flap part.
Preferably, the locking member include the bracket being fixedly connected with the valve body, the locating piece that is hinged on bracket, it is described
Immediately disk is connected with bracket and is equipped with the detent slot fixed for locating piece towards the side of bracket in advance.
By using above-mentioned technical proposal, when if desired locking member and biasing member are mutually locked, locating piece is caught in card
Position slot completes the fixation of bracket and pre- immediately disk；If desired when locking member and biasing member are mutually disengaged, locating piece is detached from card
Position slot completes the separation of bracket and pre- immediately disk.
Preferably, the both ends of the valve rod stretch out valve body and constitute force side, and two force sides are respectively connected with vibrationproof group
Part.
By using above-mentioned technical proposal, valve rod both ends simultaneously act on flap part, avoid single-ended effect and cause
The other end has the tendency that tilting, it is ensured that vibrationproof component is reliable and stable in the effect to flap part.
In conclusion the biasing member, locking member and energy accumulation member collaboration left and right, locking member in vibrationproof component are responsible for
Mutually locking or unlock carried out to vibrationproof component and opening/closing component, biasing member is responsible for realizing the whole of vibrationproof component and opening/closing component
Body linkage, accumulation of energy component release energy or put aside energy during biasing member acts, and seem independent between all parts
Complete the element task of oneself, but integrate it is rear again can work when not interfering opening/closing component to be opened, and can be
Opening/closing component is automatically prevented from opening/closing component when being closed to be caused to vibrate or open by mistake to open because of the active force by non-targeted moving gaseouse medium
The case where occur.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prior art check-valves；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 3 is the portion the A enlarged drawing of Fig. 2；
Fig. 4 is the mounting structure top view of torsional spring.
1. valve body；11. medium channel；12. input end；13. outlet end；2. valve deck；3. valve seat；41. valve rod；411. force
End；42. flap part；421. valve clack cover；422. flap ontologies；51. biasing member；511. pre- immediately disks；5111. detent slot；
512. extension bar；52. locking member；521. bracket；522. locating piece；523. articulated shaft；53. energy accumulation member；531. torsional spring；
532. axle cap；533. fixing piece；534. fixing sleeve；54. shield.
Specific embodiment
Fig. 1-4 pairs of a specific embodiment of the invention are please referred to illustrate.
Embodiment 1
The present embodiment and the prior art have the identical structure in part as follows:
As shown in Figure 1, a kind of check-valves of anti-low-flow vibration, described including the valve body 1 and valve deck 2 being fixedly connected
Valve seat 3 is equipped in valve body 1 and with input end 12 and the medium channel of outlet end 13 11, close to input end 12 in medium channel 11
Equipped with the opening/closing component for controlling input end 12 and the conducting of outlet end 13 or partition.The opening/closing component includes being arranged in valve body
Valve rod 41 on 1 and the flap part 42 with the articulated connection of valve rod 41, the flap part 42 include by confining the fixed chain of bolt
The valve clack cover 421 and flap ontology 422 connect, valve clack cover 421 and valve rod 41 are articulated and connected, and flap ontology 422 receives the drive of valve rod 41
Dynamic to seal against each other or be mutually disengaged with the formation of valve seat 3, when the two seals, input end 12 and outlet end 13 separate；When the two is detached from,
Input end 12 and outlet end 13 are connected.
The present embodiment has the structure of difference part as follows with the prior art:
As shown in Figure 2,3,41 both ends of valve rod are pierced by valve body 1 and constitute force side 411, each force side 411
Being connected has vibrationproof component, when flap part 42 is in closed state and has non-targeted moving gaseouse medium to generate work to flap part 42
When firmly, the vibrationproof component applies vibrationproof power to flap part 42 by force side 411, and the vibrationproof power and non-targeted air-flow are situated between
Matter force direction is opposite.
The vibrationproof component includes biasing member 51, locking member 52 and energy accumulation member 53.
The force side 411 of the biasing member 51 and valve rod 41 is connected and controls opening for flap part 42 with ovable valve stem 41
It closes, the locking member 52 is fixed on valve body 1 and mutually locks or be mutually disengaged with biasing member 51, the energy accumulation member 53
Stored energy when force is allowed to be closed is being carried out to opening/closing component with biasing member 51, with biasing member 51 to opening/closing component
Release energy when force is allowed to be closed.
The biasing member 51 includes the pre- immediately disk 511 and extension bar 512 that are fixedly connected, in advance immediately disk 511 and force
End 411 is fixedly connected.The locking member 52 includes the bracket 521 being fixedly connected with valve body 1, is hinged on by articulated shaft 523
Locating piece 522 on bracket 521.The pre- immediately disk 511, which is connected with bracket 521 and is equipped with towards the side of bracket 521, to be supplied
The fixed detent slot 5111 of locating piece 522, as shown in figure 4, detent slot 5111 is equipped with several and uniformly divides along its circumferencial direction
Cloth.It should be strongly noted that in order to enable locating piece 522 can be effectively to immediately disk 511 be fixed in advance, it will not be because of gravity
Act on and automatically disengage pre- immediately disk 511, therefore the present embodiment is preferred, the articulated shaft 523 of locating piece 522 and valve body 1 perpendicular to
Ground.
The energy accumulation member 53 includes the torsional spring 531 for being set in force side 411, is respectively fixedly connected with 531 both ends of torsional spring
Axle cap 542 and fixing piece 533, wherein fixing piece 533 is that pre- immediately disk 511(is needed herein, fixing piece 533 and preload
It connects disk 511 and is also possible to two different components, fixing piece 533 is fixedly connected with pre- immediately disk 511 needs at this time, but is considered
To in this way from effect, there is no increase beneficial effects instead to increase manufacturing cost, so the present embodiment is preferably
Fixing piece 533 is pre- immediately disk 511).Transition fit or interference fit have fixation between the force side 411 and torsional spring 531
Set 534, fixing sleeve 534 is fixedly connected with axle cap 542, force side 411.
The force side 411 is equipped with shield 54, and energy accumulation member 53 is placed in shield 54.The both ends of the valve rod 41 are equal
It stretches out valve body 1 and constitutes force side 411, two force sides 411 are respectively connected with vibrationproof component.
Embodiment 2
The difference from embodiment 1 is that valve rod 41, which only has one end to stretch out valve body 1, constitutes force side 411.
Specific operation process is as follows:
Operator exerts a force to extension bar 512, and the pre- immediately disk 511 of control rotates, in advance immediately disk 511 with ovable valve stem 41
Rotation, the rotation of valve rod 41 drive 42 closure or openness of flap part.In extension bar 512 by pre- immediately disk 511 with 41 turns of ovable valve stem
In dynamic process, because torsional spring 531 on force side 411 is with immediately disk 511 is fixedly connected with axle cap 542 in advance,
The state that torsional spring 531 can be in accumulation of energy or release energy according to the rotation direction of pre- immediately disk 511.When flap ontology 422 and valve
Seat 3 in the closure state because have torsional spring 531 be in energy accumulating state, this when have non-targeted moving gaseouse medium from into
Mouth end 12 enters, when striking flap ontology 422, because flap ontology 422 and valve seat 3 are inherently in closed state, this
When torsional spring 531 can automatically to valve rod 41 apply a vibrationproof power opposite with non-targeted moving gaseouse medium active force, effectively prevent
Flap ontology 422 generates vibration or opens by mistake and opens；When flap ontology 422 and valve seat 3 are in the open state, torsional spring 531 is to be in
Storage releases energy state, does not interfere the circulation of target fluid medium.
Claims (7)
1. a kind of check-valves of anti-low-flow vibration, including valve body (1) and opening/closing component (4), interior be equipped with of the valve body (1) are brought into
The medium channel (11) at mouth end (12) and outlet end (13), the opening/closing component (4) are placed in medium channel (11) close to import
End (12) and the conducting or partition for being used to control input end (12) and outlet end (13)；The opening/closing component (4) includes that setting exists
Valve rod (41) on valve body (1) and the flap part (42) with valve rod (41) articulated connection, it is characterised in that: the valve rod (41)
At least one end is pierced by valve body (1) and constitutes force side (411), and the force side (411) is connected and has vibrationproof component (5), works as valve
When valve part (42) is in closed state and has non-targeted moving gaseouse medium to generate active force to flap part (42), the vibrationproof component
(5) vibrationproof power, the vibrationproof power and non-targeted moving gaseouse medium force direction are applied to flap part (42) by force side (411)
On the contrary；The vibrationproof component (5) includes energy accumulation member (53), and the energy accumulation member (53) includes being set in force side (411)
Torsional spring (531), the axle cap (532) and fixing piece (533) for being respectively fixedly connected with torsional spring (531) both ends.
2. the check-valves of anti-low-flow vibration according to claim 1, which is characterized in that the force side (411) and torsion
Hinge is connected with fixing sleeve (534) between spring (531), the fixed company of fixing sleeve (534) and axle cap (532), force side (411)
It connects.
3. the check-valves of anti-low-flow vibration according to claim 2, which is characterized in that the force side (411) is equipped with
Shield (54), energy accumulation member (53) are placed in shield (54).
4. the check-valves of anti-low-flow vibration according to claim 1, which is characterized in that the vibrationproof component (5) includes
The force side (411) of biasing member (51) and locking member (52), the biasing member (51) and valve rod (41) be connected and
Opening and closing with ovable valve stem (41) control flap part (42), the locking member (52) is fixed on valve body (1) and and biasing member
(51) it mutually locks or is mutually disengaged.
5. the check-valves of anti-low-flow vibration according to claim 4, which is characterized in that the biasing member (51) includes
The pre- immediately disk (511) being fixedly connected and extension bar (512), immediately disk (511) is fixedly connected with force side (411) in advance.
6. the check-valves of anti-low-flow vibration according to claim 5, which is characterized in that the locking member (52) includes
The bracket (521) being fixedly connected with valve body (1), the locating piece (522) being hinged on bracket (521), the pre- immediately disk (511)
It is connected with bracket (521) and is equipped with the detent slot (5111) fixed for locating piece (522) towards the side of bracket (521).
7. the check-valves of the anti-low-flow vibration in -6 described in any one according to claim 1, which is characterized in that the valve rod
(41) both ends stretch out valve body (1) and constitute force side (411), and two force sides (411) are respectively connected with vibrationproof component (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610768857.7A CN106090342B (en) | 2016-08-29 | 2016-08-29 | The check-valves of anti-low-flow vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610768857.7A CN106090342B (en) | 2016-08-29 | 2016-08-29 | The check-valves of anti-low-flow vibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106090342A CN106090342A (en) | 2016-11-09 |
| CN106090342B true CN106090342B (en) | 2019-01-04 |
Family
ID=57224117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610768857.7A Active CN106090342B (en) | 2016-08-29 | 2016-08-29 | The check-valves of anti-low-flow vibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106090342B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997008481A1 (en) * | 1995-08-29 | 1997-03-06 | Kabushiki Kaisha Yokota Seisakusho | Swing type non-water hammer check valve |
| CN201069005Y (en) * | 2007-07-09 | 2008-06-04 | 湖北洋丰股份有限公司 | Synthetic ammonia production line dedicated check-valve |
| CN201787138U (en) * | 2010-09-10 | 2011-04-06 | 浙江鼎力阀门有限公司 | Obliquely-arranged sealing double-plate buffering check valve |
| CN203880156U (en) * | 2014-06-12 | 2014-10-15 | 卢子童 | Check valve capable of eliminating noise and preventing burst |
| CN205937994U (en) * | 2016-08-29 | 2017-02-08 | 方正阀门集团(温州)机械制造有限公司 | Prevent check valve of low air current vibration |
-
2016
- 2016-08-29 CN CN201610768857.7A patent/CN106090342B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997008481A1 (en) * | 1995-08-29 | 1997-03-06 | Kabushiki Kaisha Yokota Seisakusho | Swing type non-water hammer check valve |
| CN201069005Y (en) * | 2007-07-09 | 2008-06-04 | 湖北洋丰股份有限公司 | Synthetic ammonia production line dedicated check-valve |
| CN201787138U (en) * | 2010-09-10 | 2011-04-06 | 浙江鼎力阀门有限公司 | Obliquely-arranged sealing double-plate buffering check valve |
| CN203880156U (en) * | 2014-06-12 | 2014-10-15 | 卢子童 | Check valve capable of eliminating noise and preventing burst |
| CN205937994U (en) * | 2016-08-29 | 2017-02-08 | 方正阀门集团(温州)机械制造有限公司 | Prevent check valve of low air current vibration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106090342A (en) | 2016-11-09 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190415 Address after: 325024 No. 1921 Binhai Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee after: FANGZHENG VALVE GROUP CO.,LTD. Address before: 325024 No. 1921 Binhai Park, Wenzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: FANGZHENG VALVE GROUP (WENZHOU) MACHINERY MANUFACTURING Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 325000 no.1921 Binhai 1st Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee after: Founder Valve Group Co.,Ltd. Address before: 325024 No. 1921 Binhai Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee before: FANGZHENG VALVE GROUP Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Check valve for preventing low air flow vibration Effective date of registration: 20211126 Granted publication date: 20190104 Pledgee: Zhejiang bank Wenzhou Limited by Share Ltd. Yongjia branch Pledgor: Founder Valve Group Co.,Ltd. Registration number: Y2021330002384 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20190104 Pledgee: Zhejiang bank Wenzhou Limited by Share Ltd. Yongjia branch Pledgor: Founder Valve Group Co.,Ltd. Registration number: Y2021330002384 |