CN111336261B - Stop valve for pipeline - Google Patents
Stop valve for pipeline Download PDFInfo
- Publication number
- CN111336261B CN111336261B CN202010281345.4A CN202010281345A CN111336261B CN 111336261 B CN111336261 B CN 111336261B CN 202010281345 A CN202010281345 A CN 202010281345A CN 111336261 B CN111336261 B CN 111336261B
- Authority
- CN
- China
- Prior art keywords
- valve
- hole
- sleeve
- piston
- valve rod
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 8
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
Abstract
The invention discloses a stop valve for a pipeline, which is characterized in that: the upper portion of the valve cavity of the valve body is provided with an upper positioning block and a lower positioning block which are vertically distributed, a cylinder sleeve is arranged between the upper positioning block and the lower positioning block, a liftable piston is arranged in the cylinder sleeve, a lifting block is arranged on the valve rod and is in transmission fit with the lower end of the piston, a sleeve is further arranged outside the valve rod, the lower end of the sleeve is connected with a valve clack, a slotted hole for the valve rod to extend into is formed in the valve clack, steps are arranged on the valve rod and can drive the valve clack to move downwards, the upper end of the sleeve is connected with the piston, a left vertical hole and a right vertical hole which are distributed leftwards and rightwards are arranged on the sleeve, the upper ends of the left vertical hole and the right vertical hole are respectively communicated with a piston cavity above the piston, a liquid inlet hole and a liquid outlet which. The invention makes the stop valve easier and more labor-saving to open and close.
Description
Technical Field
The invention relates to an improved stop valve, in particular to an improved stop valve for a pipeline.
Background
The stop valve is a valve widely applied to petroleum pipelines, natural gas pipelines, fire-fighting systems, chemical systems and related industrial systems, and in the use process of the traditional stop valve, the fluid forms large pressure difference in front of and behind the valve clack, and the pressure difference is large in the opening and closing process, and when the valve is opened or closed, the moment is large, so that the valve is difficult to open or close.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the stop valve for the pipeline, which enables the opening and the closing to be easier and saves labor.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this stop valve for pipeline, including valve body, valve rod, valve gap and hand wheel, be equipped with inlet channel and the exit channel who controls the distribution in the valve body, inlet channel passes through central through-hole with exit channel and links to each other, and central through-hole department is equipped with the disk seat, and the disk seat below is equipped with sealed complex valve clack, and the valve clack links to each other with the valve rod transmission, and its characterized in that is worn to establish on the valve gap by the hand wheel drive liftable to the valve rod: an upper positioning block and a lower positioning block which are distributed up and down are arranged at the upper part of a valve cavity of the valve body, a cylinder sleeve is arranged between the upper positioning block and the lower positioning block, a liftable piston is arranged in the cylinder sleeve, a lifting block is arranged on the valve rod, the lifting block is in transmission fit with the lower end of the piston, a sleeve is also arranged outside the valve rod, the lower end of the sleeve is connected with a valve clack, a slotted hole for the valve rod to extend into is arranged on the valve clack, a step is arranged on the valve rod and can drive the valve clack to move downwards, the upper end of the sleeve is connected with the piston, a left vertical hole and a right vertical hole which are distributed left and right are arranged on the sleeve, the upper ends of the left vertical hole and the right vertical hole are respectively communicated with a piston cavity arranged above the piston, a liquid inlet hole and a liquid outlet hole which are distributed left and right are arranged on the, the lower end of the lower plug is provided with a lower prepressing spring, the lower plug is exposed in the groove hole and can be driven by the lower end of the valve rod to move downwards, the liquid discharge hole is communicated with the lower end of the right vertical hole and is controlled to be switched on and off by the upper plug, the upper plug can be arranged in the cavity of the valve clack in a lifting way, the upper end of the upper plug is provided with an upper prepressing spring, and the upper plug is exposed in the groove hole and can be driven by a lug arranged on the valve rod to move upwards.
The internal thread of the sleeve is connected with an inner top block, the upper end of the corresponding upper pre-pressing spring abuts against the lower end of the inner top block, and the lower end of the upper pre-pressing spring abuts against the upper end of the upper plug head.
And a breathing hole is formed in the lower positioning block.
The lower end of the valve body is detachably provided with an outer bottom cover.
The lower end of the valve clack is detachably provided with an inner bottom cover.
The improved stop valve for the pipeline has the advantages of ingenious structure and convenient operation, and in the opening or closing process, the pressure difference formed by the fluid in front of and behind the valve clack is small, the opening or closing moment is small, and the opening or closing is easy and labor-saving.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the closed state of the valve of the present invention.
Fig. 2 is a schematic structural view of the open state of the valve of the present invention.
Detailed Description
The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. Referring to the attached drawings 1 and 2, in the embodiment, the stop valve for the pipeline comprises a valve body 1, a valve rod 8, a valve cover 14 and a hand wheel 18, wherein an inlet channel 2 and an outlet channel 25 are arranged in the valve body 1 and distributed on the left and right, the inlet channel 2 is connected with the outlet channel 25 through a central through hole 15, a valve seat 5 is arranged at the central through hole 15, a valve clack 3 in sealing fit is arranged below the valve seat 5, the valve clack 3 is connected with the valve rod 8 in a transmission manner, the valve rod 8 is driven by the hand wheel 18 to be arranged on the valve cover 14 in a lifting and penetrating manner, an upper positioning block 13 and a lower positioning block 23 which are distributed up and down are arranged at the upper part of a valve cavity of the valve body 1, a cylinder sleeve 20 is arranged between the upper positioning block 13 and the lower positioning block 23, a lifting piston 11 is arranged in the cylinder sleeve, a sleeve 9 is arranged outside the valve rod 8, the lower end of the sleeve 9 is connected with a valve clack 3, a slotted hole 16 for the valve rod 8 to extend into is arranged on the valve clack 3, a step 17 is arranged on the valve rod 8, the step 17 is in transmission fit with the upper end opening of the slotted hole 16, so that the step 17 can drive the valve clack 3 to move downwards, the upper end of the sleeve 9 is connected with a piston 11, a left vertical hole 6 and a right vertical hole 21 which are distributed left and right are arranged on the sleeve 9, the upper ends of the left vertical hole 6 and the right vertical hole 21 are respectively communicated with a piston cavity 12 positioned above the piston 11, small holes for communicating the left vertical hole 6 with the piston cavity 12 and the right vertical hole 21 with the piston cavity 12 are arranged on the corresponding piston 11, a liquid inlet hole 4 and a liquid outlet hole 26 which are distributed left and right are arranged on the valve clack 3, when the valve is closed, the liquid inlet hole 4 is communicated with an, the lower plug 30 is arranged in the cavity of the valve clack 3 in a lifting way, the lower end of the lower plug 30 is provided with a lower prepressing spring 29, part of the lower plug 30 is exposed in the slot hole 16 and can be driven by the lower end of the valve rod 8 to move downwards, the liquid discharge hole 26 is communicated with the lower end of the right vertical hole 21 and is controlled by an upper plug 27 to be switched on and off, the upper plug 27 is arranged in the cavity of the valve clack 3 in a lifting way, the upper end of the upper plug 27 is provided with an upper prepressing spring 24, and part of the upper plug 27 is exposed in the slot hole 16 and can be driven by a lug 28 arranged on the valve rod.
As a further improved specific embodiment, the sleeve 9 is connected with the inner top block 7 through an internal thread, the upper end of the corresponding upper pre-pressing spring 24 abuts against the lower end of the inner top block 7, the lower end of the upper pre-pressing spring 24 abuts against the upper end of the upper plug 27, the inner top block 7 can move up and down, and the pre-compression amount of the upper pre-pressing spring 24 is adjusted, so as to achieve better control.
In a further improved embodiment, the lower positioning block 23 is provided with a breathing hole 22. The breathing hole 22 functions as: when the piston 11 moves downwards, the medium below the piston 11 is prevented from forming compression, thereby causing the resistance to increase when the piston 11 moves downwards; when the piston 11 moves upwards, the medium below the piston 11 is prevented from creating a negative pressure condition, resulting in a greater force being required to provide the upward movement of the piston 11.
As a further improved specific embodiment, the lower end of the valve body 1 is detachably provided with an outer bottom cover 32, so that the installation of various parts in the valve body 1 is facilitated.
As a further improved embodiment, the lower end of the valve flap 3 is detachably provided with an inner bottom cover 31, which is convenient for manufacturing, forming and installing various structures in the valve flap 3.
The starting process of the invention is as follows: the hand wheel 18 is rotated anticlockwise to drive the threaded sleeve 19 to rotate, the upper part of the valve rod 8 is in threaded connection with the threaded sleeve 19, so that the valve rod 8 and the lug 28 are driven to move downwards, the upper plug 27 moves downwards under the action of the upper pre-pressing spring 24, the lower part of the upper plug 27 extends into the right vertical hole 21 and the liquid discharge hole 26, the lower end part of the valve rod 8 pushes the lower plug 30 to move downwards along with the downward movement of the valve rod 8 and the lug 28, the left vertical hole 6 is communicated with the liquid inlet hole 4, a medium at the inlet side of the valve sequentially passes through the liquid inlet hole 4 and the left vertical hole 6 to enter the piston cavity 12, at the moment, the medium pressure difference at the upstream and downstream parts of the valve clack 3 is reduced, the hand wheel 18 is rotated anticlockwise continuously to drive the valve rod 8 to move downwards, when the middle step end face of the valve rod 8 is abutted against the upper end face of the valve clack 3, the valve rod 8 continuously, the valve is opened, and in the whole process, the hand wheel 18 is rotated by a small force, so that the valve is easy and labor-saving to open.
The closing process of the invention: clockwise rotation hand wheel 18 drives swivel nut 19 to rotate, the upper portion of valve rod 8 forms threaded connection with swivel nut 19, therefore drive valve rod 8 and lug 28 to move upwards, lower plug 30 moves upwards under the effect of lower precompression spring 29, the upper portion of lower plug 30 stretches into and keeps apart left vertical hole 6 and feed liquor hole 4, with the continuation of valve rod 8 and lug 28 move upwards, lug 28 collides with upper plug 27, because under the effect of upper precompression spring 24, upper plug 27 abuts against lug 28, continue moving up valve rod 8, drive valve flap 3, piston 11, sleeve 9 move upwards together, when the sealing surface of valve flap 3 collides against the sealing surface of valve seat 5, continue moving up valve rod 8, lug 28 drives upper plug 27 to move upwards relative to sleeve 9, upper precompression spring 24 compresses, the lower portion of upper plug 27 breaks away from the junction of right vertical hole 21 and discharge hole 26, right vertical hole 21 communicates discharge hole 26, the medium in piston chamber 12 loops through right vertical hole 21, lower part of valve rod, The liquid discharging hole 26 is discharged, at the moment, the valve clack 3 only receives upward thrust of a medium at the inlet side, the sealing surface of the valve clack 3 compresses the sealing surface of the valve seat 5, the sealing performance is good, in the whole process of closing the valve, only a small force is needed to rotate the hand wheel 18, and the valve is easy and labor-saving to close.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a stop valve for pipeline, including valve body, valve rod, valve gap and hand wheel, be equipped with inlet channel and the exit channel who controls the distribution in the valve body, inlet channel passes through central through-hole with exit channel and links to each other, and central through-hole department is equipped with the disk seat, and the disk seat below is equipped with sealed complex valve clack, and the valve clack links to each other with the valve rod transmission, and its characterized in that is worn to establish on the valve gap by the hand wheel drive liftable to the valve rod: an upper positioning block and a lower positioning block which are distributed up and down are arranged at the upper part of a valve cavity of the valve body, a cylinder sleeve is arranged between the upper positioning block and the lower positioning block, a liftable piston is arranged in the cylinder sleeve, a lifting block is arranged on the valve rod, the lifting block is in transmission fit with the lower end of the piston, a sleeve is also arranged outside the valve rod, the lower end of the sleeve is connected with a valve clack, a slotted hole for the valve rod to extend into is arranged on the valve clack, a step is arranged on the valve rod and can drive the valve clack to move downwards, the upper end of the sleeve is connected with the piston, a left vertical hole and a right vertical hole which are distributed left and right are arranged on the sleeve, the upper ends of the left vertical hole and the right vertical hole are respectively communicated with a piston cavity arranged above the piston, a liquid inlet hole and a liquid outlet hole which are distributed left and right are arranged on the, the lower end of the lower plug is provided with a lower prepressing spring, the lower plug is exposed in the groove hole and can be driven by the lower end of the valve rod to move downwards, the liquid discharge hole is communicated with the lower end of the right vertical hole and is controlled to be switched on and off by the upper plug, the upper plug can be arranged in the cavity of the valve clack in a lifting way, the upper end of the upper plug is provided with an upper prepressing spring, and the upper plug is exposed in the groove hole and can be driven by a lug arranged on the valve rod to move upwards.
2. A shut-off valve for piping as claimed in claim 1, wherein: the internal thread of the sleeve is connected with an inner top block, the upper end of the corresponding upper pre-pressing spring abuts against the lower end of the inner top block, and the lower end of the upper pre-pressing spring abuts against the upper end of the upper plug head.
3. A shut-off valve for piping as claimed in claim 1, wherein: and a breathing hole is formed in the lower positioning block.
4. A shut-off valve for piping as claimed in claim 1, wherein: the lower end of the valve body is detachably provided with an outer bottom cover.
5. A shut-off valve for piping as claimed in claim 1, wherein: the lower end of the valve clack is detachably provided with an inner bottom cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010281345.4A CN111336261B (en) | 2020-04-10 | 2020-04-10 | Stop valve for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010281345.4A CN111336261B (en) | 2020-04-10 | 2020-04-10 | Stop valve for pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111336261A CN111336261A (en) | 2020-06-26 |
| CN111336261B true CN111336261B (en) | 2021-07-13 |
Family
ID=71180892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010281345.4A Active CN111336261B (en) | 2020-04-10 | 2020-04-10 | Stop valve for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111336261B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324052B (en) * | 2021-07-01 | 2023-03-10 | 浙江冠正阀门股份有限公司 | Industrial butterfly valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB661457A (en) * | 1948-11-05 | 1951-11-21 | United Aircraft Prod | Valve construction |
| CN2046570U (en) * | 1988-08-20 | 1989-10-25 | 胜利油田设计规划研究院 | High-pressure stop valve |
| US6176437B1 (en) * | 1993-10-15 | 2001-01-23 | Mona Skannerup | Blast gun for compressed air |
| CN1356485A (en) * | 2001-12-11 | 2002-07-03 | 哈尔滨工程大学 | Pilot differential valve with metering function |
| CN2539885Y (en) * | 2002-04-18 | 2003-03-12 | 赵国大 | Internal balanced pneumatic stop valve |
-
2020
- 2020-04-10 CN CN202010281345.4A patent/CN111336261B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB661457A (en) * | 1948-11-05 | 1951-11-21 | United Aircraft Prod | Valve construction |
| CN2046570U (en) * | 1988-08-20 | 1989-10-25 | 胜利油田设计规划研究院 | High-pressure stop valve |
| US6176437B1 (en) * | 1993-10-15 | 2001-01-23 | Mona Skannerup | Blast gun for compressed air |
| CN1356485A (en) * | 2001-12-11 | 2002-07-03 | 哈尔滨工程大学 | Pilot differential valve with metering function |
| CN2539885Y (en) * | 2002-04-18 | 2003-03-12 | 赵国大 | Internal balanced pneumatic stop valve |
Non-Patent Citations (1)
| Title |
|---|
| "阀芯卸荷结构对先导式活塞截止阀性能的影响";张孟杰;《机床与液压》;20160828;第44卷(第16期);第81-84页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111336261A (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201144914Y (en) | Pilot type pressure reducing valve | |
| CN111336261B (en) | Stop valve for pipeline | |
| CN110671502B (en) | Water hammer resistant stop valve | |
| CN103836237B (en) | Fusiformis is adjustable non-return valve | |
| CN213839571U (en) | Differential pressure regulating valve | |
| CN203036023U (en) | Fusiform adjustable check valve | |
| CN203309243U (en) | Valve excessive pressure prevention device | |
| CN109838366B (en) | Diaphragm booster pump with switch and protective adjusting structure | |
| CN110195783B (en) | Piston type valve core pressure self-balancing stop throttle valve | |
| CN204922118U (en) | Relief pressure valve structure with adjustable pressure | |
| CN203743548U (en) | Special pressure reducing and stabilizing valve for fire protection | |
| CN201496568U (en) | Single-seat pressure balance adjusting valve | |
| CN103411007A (en) | Independent pilot-operated type flow control valve | |
| CN203413197U (en) | Self-reliance pilot-operated type flow control valve | |
| CN114484053A (en) | Control system of pneumatic stop valve | |
| CN2675971Y (en) | Membrane type double-chamber balanced rapid-open soil discharging electromagnetic valve | |
| CN110388486B (en) | Anti-scouring composite valve group | |
| CN104879543A (en) | Automatic-control constant-pressure throttling valve | |
| CN204692719U (en) | A kind of actuator for throttle valve | |
| CN204692683U (en) | A kind of automatic control constant voltage throttle valve | |
| CN201228794Y (en) | Pressure reducing valve special for oxygen | |
| CN201016329Y (en) | Adjustable combination valve hydraulic force balancing pump head | |
| CN2409389Y (en) | Three-position two-way piston valve | |
| CN218187648U (en) | Indoor fire hydrant for fire fighting | |
| CN219588145U (en) | Hydraulic throttle valve for well control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210623 Address after: No.888, 8 Weiyang Road, Gaoling District, Xi'an, Shaanxi 710000 Applicant after: Chevron Valve Group Co.,Ltd. Address before: No.63, Maidao North Road, Maidao village, Oubei street, Yongjia County, Wenzhou City, Zhejiang Province Applicant before: Yongjia Qida Intellectual Property Consulting Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |