CN110805715A - Change disk seat ball valve on line - Google Patents
Change disk seat ball valve on line Download PDFInfo
- Publication number
- CN110805715A CN110805715A CN201911123461.7A CN201911123461A CN110805715A CN 110805715 A CN110805715 A CN 110805715A CN 201911123461 A CN201911123461 A CN 201911123461A CN 110805715 A CN110805715 A CN 110805715A
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- Prior art keywords
- sleeve
- pull
- valve body
- valve
- valve seat
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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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Classifications
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- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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- 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
- F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
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- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
Abstract
The invention discloses a ball valve with an online replacement valve seat, which comprises a left valve body and a right valve body which are communicated, wherein a ball body is arranged in the right valve body, a left valve seat is arranged in the corresponding left valve body, a right valve seat is arranged in the right valve body, a valve rod is rotatably arranged at the upper end of the right valve body in a penetrating manner, the lower end of the valve rod is connected with the ball valve in a transmission manner, and the upper end of the valve rod is connected with a: the lower end of the right valve body can move up and down to penetrate through a positioning rod, the lower end of the corresponding ball body is provided with a positioning hole, and the positioning rod is matched with the positioning hole; and a left backup valve seat is also arranged in the channel of the left valve body, the left valve seat can be directly drawn out from the left valve body, and the left backup valve seat replaces the left valve seat. When the left valve seat is damaged, the damaged left valve seat can be taken out without stopping running the pipeline or disassembling the ball valve, and the left backup valve seat is moved to the position of the original left valve seat, so that the invention has the advantage of replacing the left valve seat on line.
Description
Technical Field
The invention relates to an improved ball valve, in particular to an improved ball valve with an online replacement valve seat.
Background
The ball valve is the valve of a wide application in petroleum pipeline, natural gas line and chemical industry system, traditional type ball valve that floats is when using, and the spheroid compresses tightly the outlet side disk seat under the promotion of medium and seals, because the disk seat material is made for fluoroplastics or nylon materials, therefore the easy wearing and tearing of outlet side disk seat, when the wearing and tearing of outlet side disk seat, can't carry out online change, need the shut down pipeline, dismantle the valve and maintain, change the disk seat, cause the bulk loss of manpower, material resources.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the ball valve with the valve seat replaced on line, which has a skillful structure and saves time and labor.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this kind of change disk seat ball valve on line, including the left valve body and the right valve body that are linked together, be equipped with the spheroid in the right valve body, be equipped with left disk seat in the left valve body that corresponds, be equipped with right disk seat in the right valve body, the valve rod is worn to be equipped with in the rotation of right valve body upper end, and the valve rod lower extreme links to each other with the ball valve transmission, and the valve rod upper end is connected with spanner, its characterized: the lower end of the right valve body can move up and down to penetrate through a positioning rod, the lower end of the corresponding ball body is provided with a positioning hole, and the positioning rod is matched with the positioning hole; an inner bushing is arranged in a channel of the left valve body, the left end of the inner bushing is fixed in the left valve body through an outer positioning ring, an inner pull sleeve, an outer pull sleeve, a pull gear sleeve, a push gear sleeve and a top sleeve are arranged between the inner bushing and the inner wall of the left valve body, a left backup valve seat is arranged on the left side of the left valve seat, butted spiral grooves are formed in the inner peripheries of the left valve seat and the left backup valve seat, a drag hook is arranged at the right end of the inner pull sleeve and extends into the spiral grooves, a push plate is arranged at the right end of the outer pull sleeve and is butted on the left side of the left backup valve seat, the left ends of the inner pull sleeve and the outer pull sleeve are respectively in threaded transmission connection with the pull gear sleeve to move left and right, the pitch of connecting threads between the inner pull sleeve and the pull gear sleeve is larger than that between the outer pull sleeve and the pull gear sleeve, the pull gear sleeve is connected with a first rotary driving structure, the, the pull gear sleeve is limited on the right side of the inner positioning ring, the outer periphery of the push gear sleeve is in threaded connection with the inner periphery of the push gear sleeve, the push gear sleeve is connected with a second rotary driving structure, the push gear sleeve drives the push sleeve to move left and right, the right end of the push sleeve is abutted against the pull gear sleeve, and the push sleeve is provided with an anti-rotation structure; the lower end of the left valve body is further provided with a pull box penetrating through a channel of the left valve body, the lower end of the pull box is provided with a sealing plate, a pull rod moving up and down penetrates through the sealing plate, a T-shaped head is arranged at the upper end of the pull rod, T-shaped grooves are formed in the lower ends of the corresponding left valve seat and the left backup valve seat, and the T-shaped heads are arranged on a moving path of the T-shaped grooves in a matched mode.
The first rotary driving structure comprises a first worm and a first hand wheel, the first worm is rotatably arranged on the left valve body in a penetrating mode, the outer end of the first worm is connected with the first hand wheel, and the inner end of the first worm is meshed with the periphery of the gear sleeve.
The second rotary driving structure comprises a second worm and a second hand wheel, the second worm is rotatably arranged on the left valve body in a penetrating mode, the outer end of the second worm is connected with the first hand wheel, and the inner end of the second worm is meshed with the periphery of the gear pushing sleeve.
The anti-rotation structure comprises a positioning pin, the right end of the positioning pin penetrates through the top sleeve, and the left end of the positioning pin is fixed on the outer positioning ring.
And a packing is arranged between the valve rod and the right valve body, a gland is arranged at the upper end of the packing and is fixed on the right valve body.
The locating lever is the type of falling T, and locating lever upper portion links to each other with right valve body screw thread.
The draw hook is provided with an upper hook head and a lower hook head which are symmetrical up and down, and the upper hook head and the lower hook head respectively extend into the spiral groove.
The improved ball valve with the valve seat replaced on line has the advantages that when the valve is used, if the left valve seat is damaged, the left valve seat can be taken out without stopping running a pipeline or disassembling the ball valve, and the left backup valve seat is moved to the position of the original left valve seat, so that the left valve seat can be replaced on line.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view a-a of fig. 1 of the present invention.
Fig. 3 is a cross-sectional view E-E of fig. 1 according to the present invention.
Fig. 4 is a cross-sectional view D-D of fig. 1 of the present invention.
FIG. 5 is a sectional view of the left valve seat and left backup valve seat assembly of the present invention.
FIG. 6 is an enlarged view of the portion of FIG. 5 taken along line C.
Fig. 7 is a schematic structural view of the retractor 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. The online valve seat replacing ball valve comprises a left valve body 23 and a right valve body 1 which are communicated, wherein a ball body 2 is arranged in the right valve body 1, a left valve seat 8 is arranged in the corresponding left valve body 23, a right valve seat 3 is arranged in the right valve body 1, and the left valve seat 8 and the right valve seat 3 are respectively in sealing fit with the ball body 2; a valve rod 6 is rotatably arranged at the upper end of the right valve body 1 in a penetrating manner, the lower end of the valve rod 6 is connected with a ball valve in a transmission manner, a wrench 7 is connected at the upper end of the valve rod 6, a positioning rod 36 is arranged at the lower end of the right valve body 1 in a penetrating manner in a vertically moving manner, a positioning hole 37 is arranged at the lower end of the corresponding ball body 2, and the positioning rod 36 is matched; an inner bushing 21 is arranged in a channel of the left valve body 23, the left end of the inner bushing 21 is fixed in the left valve body 23 through an outer positioning ring 22, an inner pull sleeve 13, an outer pull sleeve 12, a pull gear sleeve 15, a push gear sleeve 18 and a top sleeve 16 are arranged between the inner bushing 21 and the inner wall of the left valve body 23, the outer pull sleeve 12 is sleeved on the periphery of the inner pull sleeve 13, the push gear sleeve 18 can rotate circumferentially and move axially on the inner bushing 21, a left backup valve seat 10 is arranged on the left side of the left valve seat 8, the left backup valve seat 10 is attached to the left valve seat 8, a butted spiral groove 32 is formed in the inner peripheries of the left valve seat 8 and the left backup valve seat 10, a drag hook 9 is arranged at the right end of the inner pull sleeve 13, an upper hook head 34 and a lower hook head 35 which are vertically symmetrical are arranged on the drag hook 9, the upper hook head 34 and the lower hook head 35 respectively extend into the spiral groove 32, a push plate 11 is arranged at the right end, the left ends of the inner pull sleeve 13 and the outer pull sleeve 12 are respectively in threaded transmission connection with the pull gear sleeve 15 to move left and right, the pitch of a connecting thread between the inner pull sleeve 13 and the pull gear sleeve 15 is larger than that between the outer pull sleeve 12 and the pull gear sleeve 15, the pull gear sleeve 15 is connected with a first rotary driving structure, an inner positioning ring 20 is arranged on the inner liner 21, the pull gear sleeve 15 is limited on the right side of the inner positioning ring 20, the outer periphery of the top sleeve 16 is in threaded connection with the inner periphery of the push gear sleeve 18, the push gear sleeve 18 is connected with a second rotary driving structure, the push gear sleeve 18 drives the top sleeve 16 to move left and right, the top sleeve 16 abuts against the pull gear sleeve 15, and an anti-rotation structure 19 is arranged on the top sleeve 16; the lower end of the left valve body 23 is further provided with a pull box 25 penetrating through a channel of the left valve body 23, the lower end of the pull box 25 is provided with a sealing plate 26, a pull rod 27 moving up and down penetrates through the sealing plate 26, a sealing block 24 is arranged between the pull rod 27 and an inner cavity of the pull box 25, the upper end of the pull rod 27 is provided with a T-shaped head 28, the lower ends of the corresponding left valve seat 8 and the left backup valve seat 10 are provided with T-shaped grooves 29, and the T-shaped heads 28 are arranged on a moving path of the T-shaped grooves.
The first rotary driving structure comprises a first worm 31 and a first hand wheel 14, the first worm 31 rotates to penetrate through the left valve body 23, the outer end of the first worm 31 is connected with the first hand wheel 14, the inner end of the first worm 31 is meshed with the periphery of the gear pulling sleeve 15, and when the first rotary driving structure works, the first hand wheel 14 is rotated, and the gear pulling sleeve 15 is driven to rotate through the first worm 31.
The second rotary driving structure comprises a second worm 30 and a second hand wheel 17, the second worm 30 is rotatably arranged on the left valve body 23 in a penetrating mode, the outer end of the second worm 30 is connected with the first hand wheel 14, the inner end of the second worm 30 is meshed with the periphery of the push gear sleeve 18, and when the second rotary driving structure works, the second hand wheel 17 is rotated, and the push gear sleeve 18 is driven to rotate through the second worm 30.
The anti-rotation structure 19 comprises a positioning pin, the right end of the positioning pin penetrates through the top sleeve 16, and the left end of the positioning pin is fixed on the outer positioning ring 22.
And a packing 4 is arranged between the valve rod 6 and the right valve body 1, a gland 5 is arranged at the upper end of the packing 4, and the gland 5 is fixed on the right valve body 1.
The positioning rod 36 is of an inverted T shape, the upper portion of the positioning rod 36 is in threaded connection with the right valve body 1, and the positioning rod 36 can move up and down at the lower end of the right valve body 1.
According to the working principle of the invention, when the left valve seat 8 is damaged, the wrench is rotated, the valve rod 6 transmits the rotation of the ball body 2 to close, the lower positioning rod 36 is rotated to move up and down, and the positioning rod extends into the positioning block at the lower end of the ball body 2 to support and position the ball body 2, so that the ball body 2 is prevented from deviating towards the outlet side, the ball body 2 and the right valve seat 3 form temporary sealing, then the first rotary driving structure is rotated, and the pull gear sleeve 15 is driven to rotate, the inner pull sleeve 13 and the outer pull sleeve 12 are in threaded connection with the pull gear sleeve 15, and the pitch of the connecting thread between the inner pull sleeve 13 and the pull gear sleeve 15 is greater than that between the outer pull sleeve 12 and the pull gear sleeve 15, so that the inner pull sleeve 12 and the outer pull sleeve 12 simultaneously move leftwards under the effect of the connecting thread between the inner pull sleeve 12 and the pull gear sleeve 15, and the distance that the inner pull sleeve 13 moves leftwards is; meanwhile, the draw hook 9 at the right end of the inner pull sleeve 13 acts on the spiral groove 32 and drives the left valve seat 8 and the left backup valve seat 10 to move left, and because the distance that the left valve seat 8 and the left backup valve seat 10 move left is smaller than the distance that the inner pull sleeve 13 and the draw hook 9 move left under the action of the push plate 11 and the outer pull sleeve 12, when the left valve seat 8, the left backup valve seat 10, the inner pull sleeve 13, the outer pull sleeve 12, the push plate 11 and the draw hook 9 move left, the upper hook head 34 and the lower hook head 35 respectively rotate along the spiral groove 32 and move left relative to the left valve seat 8 and the left backup valve seat 10, when the upper hook head 34 and the lower hook head 35 respectively move from the spiral groove 32 of the left valve seat 8 to the spiral groove 32 of the left backup valve seat 10, the left valve seat 8 just moves to the right front of the inner cavity of the draw box 25, at the moment, the first rotation driving structure is stopped, the draw rod 27 outwards, and under the action of the, the left valve seat 8 can be pulled to the inner cavity of the pull box 25.
After the left valve seat 8 is taken out, the second rotary driving structure is rotated to drive the push gear sleeve 18 to rotate, a threaded connection is formed between the push gear sleeve 18 and the push sleeve 16, so that the push sleeve 16 moves rightwards, the pull gear sleeve 15, the inner pull sleeve 13, the outer pull sleeve 12, the push plate 11, the drag hook 9 and the left backup valve seat 10 are driven to move rightwards simultaneously, when the left backup valve seat 10 moves rightwards to the original position of the left valve seat 8, the second rotary driving structure stops rotating, the positioning rod 36 rotates downwards, the positioning rod 36 is separated from the positioning hole of the sphere 2, at the moment, the left valve seat 8 is completely replaced, and the valve can be normally opened and closed.
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 (7)
1. The utility model provides an online change disk seat ball valve, is equipped with the spheroid in the right valve body including the left valve body and the right valve body that are linked together, is equipped with left disk seat in the left valve body that corresponds, is equipped with right disk seat in the right valve body, and the valve rod is worn to be equipped with in the rotation of right valve body upper end, and the valve rod lower extreme links to each other with the ball valve transmission, and the valve rod upper end is connected with spanner, its: the lower end of the right valve body can move up and down to penetrate through a positioning rod, the lower end of the corresponding ball body is provided with a positioning hole, and the positioning rod is matched with the positioning hole; an inner bushing is arranged in a channel of the left valve body, the left end of the inner bushing is fixed in the left valve body through an outer positioning ring, an inner pull sleeve, an outer pull sleeve, a pull gear sleeve, a push gear sleeve and a top sleeve are arranged between the inner bushing and the inner wall of the left valve body, a left backup valve seat is arranged on the left side of the left valve seat, butted spiral grooves are formed in the inner peripheries of the left valve seat and the left backup valve seat, a drag hook is arranged at the right end of the inner pull sleeve and extends into the spiral grooves, a push plate is arranged at the right end of the outer pull sleeve and is butted on the left side of the left backup valve seat, the left ends of the inner pull sleeve and the outer pull sleeve are respectively in threaded transmission connection with the pull gear sleeve to move left and right, the pitch of connecting threads between the inner pull sleeve and the pull gear sleeve is larger than that between the outer pull sleeve and the pull gear sleeve, the pull gear sleeve is connected with a first rotary driving structure, the, the pull gear sleeve is limited on the right side of the inner positioning ring, the outer periphery of the push gear sleeve is in threaded connection with the inner periphery of the push gear sleeve, the push gear sleeve is connected with a second rotary driving structure, the push gear sleeve drives the push sleeve to move left and right, the right end of the push sleeve is abutted against the pull gear sleeve, and the push sleeve is provided with an anti-rotation structure; the lower end of the left valve body is further provided with a pull box penetrating through a channel of the left valve body, the lower end of the pull box is provided with a sealing plate, a pull rod moving up and down penetrates through the sealing plate, a T-shaped head is arranged at the upper end of the pull rod, T-shaped grooves are formed in the lower ends of the corresponding left valve seat and the left backup valve seat, and the T-shaped heads are arranged on a moving path of the T-shaped grooves in a matched mode.
2. The on-line replacement seat ball valve of claim 1, wherein: the first rotary driving structure comprises a first worm and a first hand wheel, the first worm is rotatably arranged on the left valve body in a penetrating mode, the outer end of the first worm is connected with the first hand wheel, and the inner end of the first worm is meshed with the periphery of the gear sleeve.
3. The on-line replacement seat ball valve of claim 1, wherein: the second rotary driving structure comprises a second worm and a second hand wheel, the second worm is rotatably arranged on the left valve body in a penetrating mode, the outer end of the second worm is connected with the first hand wheel, and the inner end of the second worm is meshed with the periphery of the gear pushing sleeve.
4. The on-line replacement seat ball valve of claim 1, wherein: the anti-rotation structure comprises a positioning pin, the right end of the positioning pin penetrates through the top sleeve, and the left end of the positioning pin is fixed on the outer positioning ring.
5. The on-line replacement seat ball valve of claim 1, wherein: and a packing is arranged between the valve rod and the right valve body, a gland is arranged at the upper end of the packing and is fixed on the right valve body.
6. The on-line replacement seat ball valve of claim 1, wherein: the locating lever is the type of falling T, and locating lever upper portion links to each other with right valve body screw thread.
7. The on-line replacement seat ball valve of claim 1, wherein: the draw hook is provided with an upper hook head and a lower hook head which are symmetrical up and down, and the upper hook head and the lower hook head respectively extend into the spiral groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123461.7A CN110805715B (en) | 2019-11-16 | 2019-11-16 | Change disk seat ball valve on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123461.7A CN110805715B (en) | 2019-11-16 | 2019-11-16 | Change disk seat ball valve on line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110805715A true CN110805715A (en) | 2020-02-18 |
| CN110805715B CN110805715B (en) | 2021-04-20 |
Family
ID=69490195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911123461.7A Active CN110805715B (en) | 2019-11-16 | 2019-11-16 | Change disk seat ball valve on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110805715B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3157190A (en) * | 1960-05-26 | 1964-11-17 | Cameron Iron Works Inc | Ball valve |
| CN1869485A (en) * | 2006-06-12 | 2006-11-29 | 郑州阀门厂 | Water injection alarm gas stop valve capable of changing metal sealing ring |
| CN104455530A (en) * | 2014-11-25 | 2015-03-25 | 天津百利展发集团有限公司 | Valve seat combination structure easy and convenient to maintain |
| CN204805610U (en) * | 2015-04-30 | 2015-11-25 | 自贡新地佩尔阀门有限公司 | Removable self -tightening high temperature valve seat seal structure of track ball valve |
| CN205908795U (en) * | 2016-06-12 | 2017-01-25 | 成都成高阀门有限公司 | Can dismantle valve seat seal structure reaches track ball valve including this seal structure |
| CN206754583U (en) * | 2017-05-08 | 2017-12-15 | 天津鼎津阀门有限公司 | A kind of ball valve being conveniently replaceable |
| CN209309365U (en) * | 2018-11-30 | 2019-08-27 | 博纳斯威阀门股份有限公司 | It is a kind of can rapid pretension and adjust replacement sealing ball valve |
-
2019
- 2019-11-16 CN CN201911123461.7A patent/CN110805715B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3157190A (en) * | 1960-05-26 | 1964-11-17 | Cameron Iron Works Inc | Ball valve |
| CN1869485A (en) * | 2006-06-12 | 2006-11-29 | 郑州阀门厂 | Water injection alarm gas stop valve capable of changing metal sealing ring |
| CN104455530A (en) * | 2014-11-25 | 2015-03-25 | 天津百利展发集团有限公司 | Valve seat combination structure easy and convenient to maintain |
| CN204805610U (en) * | 2015-04-30 | 2015-11-25 | 自贡新地佩尔阀门有限公司 | Removable self -tightening high temperature valve seat seal structure of track ball valve |
| CN205908795U (en) * | 2016-06-12 | 2017-01-25 | 成都成高阀门有限公司 | Can dismantle valve seat seal structure reaches track ball valve including this seal structure |
| CN206754583U (en) * | 2017-05-08 | 2017-12-15 | 天津鼎津阀门有限公司 | A kind of ball valve being conveniently replaceable |
| CN209309365U (en) * | 2018-11-30 | 2019-08-27 | 博纳斯威阀门股份有限公司 | It is a kind of can rapid pretension and adjust replacement sealing ball valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110805715B (en) | 2021-04-20 |
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Effective date of registration: 20210331 Address after: 325100 Dongou Industrial Park, Dongou street, Yongjia County, Wenzhou City, Zhejiang Province Applicant after: Zhejiang special valve 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. |
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