CN107842627B - Hard seal ball valve - Google Patents
Hard seal ball valve Download PDFInfo
- Publication number
- CN107842627B CN107842627B CN201711108937.0A CN201711108937A CN107842627B CN 107842627 B CN107842627 B CN 107842627B CN 201711108937 A CN201711108937 A CN 201711108937A CN 107842627 B CN107842627 B CN 107842627B
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- CN
- China
- Prior art keywords
- valve
- valve seat
- seat cavity
- ball
- cavity
- Prior art date
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- 238000007789 sealing Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
-
- 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
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/06—Devices for relieving the pressure on the sealing faces for taps or cocks
-
- 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
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Abstract
The invention provides a hard seal ball valve. The valve comprises a valve body, a valve cover, a valve seat, a valve ball, an upper valve rod and a lower valve rod, wherein the valve ball is arranged in the valve body, the upper end of the valve ball is connected with the upper valve rod, the lower end of the valve ball is connected with the lower valve rod, the valve covers are arranged on two sides of the valve body, and the valve seat is arranged in a valve seat cavity on the valve cover; the valve seat is communicated with the left valve seat cavity, a left valve seat cavity diversion hole is formed in the valve seat cavity, one end of the left valve seat cavity diversion hole is led into the left valve seat cavity on the inner side of the left valve seat sealing ring, the other end of the left valve seat cavity diversion hole is led into the left valve seat cavity on the outer side of the left valve seat sealing ring, and a left diversion valve is arranged on the left valve seat cavity diversion hole; the valve seat is communicated with the right valve seat cavity, a right valve seat cavity diversion hole is formed in the valve seat cavity, one end of the right valve seat cavity diversion hole is communicated with the right valve seat cavity on the inner side of the right valve seat sealing ring, the other end of the right valve seat cavity diversion hole is communicated with the right valve seat cavity on the outer side of the right valve seat sealing ring, and a right diversion valve is arranged on the right valve seat cavity diversion hole.
Description
Technical Field
The invention relates to a valve, in particular to a hard sealing ball valve.
Background
Currently, ball valves are widely used in industries such as petroleum, chemical industry, electric power, metallurgy, paper making and the like. The traditional ball valve generally adopts soft seal, because the restriction of sealing material, its application temperature scope is little, high temperature resistant, high pressure and corrosion behavior are low, and life is shorter, to the special operating mode condition that adopts high parameter, high performance ball valve as the piece of opening and close, if: in the case of ore pulp, ash, dust and the like, the conditions cannot be met, and therefore, a hard sealing ball valve is adopted. The existing hard sealing ball valve is generally composed of a valve body, a valve cover, a valve ball, a valve seat and a valve rod, and when in use, the valve rod is rotated to drive the valve ball at the lower end of the valve ball to rotate, so that through holes on the valve ball correspond to or are staggered with flow passage holes of the valve, and the opening or closing of the ball valve is realized. Because the valve rod torque is larger when the ball valve is opened due to the influence of the medium pressure in the valve body, the ball valve is not easy to open, the acting force of the valve seat and the valve ball is larger when the ball valve is opened, the abrasion of the sealing surface of the valve seat and the valve ball is easy to cause leakage, the working reliability of the ball valve is reduced, and the service life of the ball valve is shortened. Although innovative hard seal ball valves are also currently being developed, the structure is complex, and the use and maintenance are inconvenient.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the hard seal ball valve which has the advantages of reasonable structure, small torque of the valve rod when the ball valve is opened, easy opening of the ball valve, small acting force between the valve seat and the valve ball when the ball valve is opened, difficult abrasion between the sealing surface of the valve seat and the valve ball, reliable operation, long service life, convenient use and maintenance, high temperature resistance, high pressure resistance and good sealing performance.
The technical scheme adopted for solving the technical problems is as follows: the valve comprises a valve body, a valve cover, a valve seat, a valve ball, an upper valve rod and a lower valve rod; the valve body is internally provided with a valve ball with a through hole, the upper end of the valve ball is connected with an upper valve rod, the lower end of the valve ball is connected with a lower valve rod, the upper valve rod and the lower valve rod are arranged on the valve body, the two sides of the valve body are provided with a left valve cover and a right valve cover with flow passage holes, the left valve seat and the right valve seat are respectively arranged in valve seat cavities of the left valve cover and the right valve cover and are positioned at the two sides of the valve ball, the outer end of the valve seat is provided with a valve seat spring, and a sealing ring is arranged between the valve seat and the valve seat cavity; the method is characterized in that: the valve seat is communicated with the left valve seat cavity, a left valve seat cavity diversion hole is formed in the valve seat cavity, one end of the left valve seat cavity diversion hole is led into the left valve seat cavity on the inner side of the left valve seat sealing ring, the other end of the left valve seat cavity diversion hole is led into the left valve seat cavity on the outer side of the left valve seat sealing ring, and a left diversion valve is arranged on the left valve seat cavity diversion hole; the valve seat is communicated with the right valve seat cavity, a right valve seat cavity diversion hole is formed in the valve seat cavity, one end of the right valve seat cavity diversion hole is communicated with the right valve seat cavity on the inner side of the right valve seat sealing ring, the other end of the right valve seat cavity diversion hole is communicated with the right valve seat cavity on the outer side of the right valve seat sealing ring, and a right diversion valve is arranged on the right valve seat cavity diversion hole.
The left valve seat cavity is provided with a left valve seat cavity inner guide port and a left valve seat cavity outer guide port which are communicated with the left valve seat cavity guide hole, and the left valve seat cavity inner guide port and the left valve seat cavity outer guide port are arranged between the left valve seat cavity and the left valve seat and correspond to two sides of the left valve seat sealing ring; and a right valve seat cavity inner guide port and a right valve seat cavity outer guide port which are communicated with the right valve seat cavity guide hole are arranged between the right valve seat cavity and the right valve seat and correspond to two sides of the right valve seat sealing ring.
The left and right valve seat cavities and the outer guide flow openings are arranged between the left and right valve seat cavities and the left and right valve seats, or on the left and right valve seat cavities, or on the left and right valve covers, or on the valve body.
The number of the left valve seat cavity diversion holes and the right valve seat cavity diversion holes is 1 or more than 1 respectively.
The left valve seat cavity guide holes and the right valve seat cavity guide holes are arranged on the left valve cover and the right valve cover, or are arranged on the valve body and the valve cover.
The left and right valve seat chamber pilot holes may be connected to the outside of the ball valve through short pipes.
Short pipe connection can be arranged between the left valve seat cavity diversion hole and the right valve seat cavity diversion hole and the left diversion valve and the right diversion valve.
The left and right diversion valves are respectively in a left and right type structure or are in one of a valve group type structure, a multi-way valve type structure and an integral structure, and an upper valve rod transmission (linkage) type structure. The structure can enable the left diversion valve and the right diversion valve to be respectively opened or simultaneously opened.
The left flow guiding valve and the right flow guiding valve are arranged outside the ball valve, or inside the ball valve, or at different positions, or at the same position.
The invention has reasonable structure, effectively ensures that the torque of the valve rod is small when the ball valve is opened, so that the ball valve is easy to open, the acting force of the valve seat and the valve ball is small when the ball valve is opened, the sealing surface of the valve seat and the valve ball are not easy to wear, the working is reliable, the service life is long, the hard seal ball valve is convenient to use and maintain, and the hard seal ball valve has high temperature resistance, high pressure resistance and good sealing performance.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a left valve cover according to the present invention;
FIG. 3 is a cross-sectional view taken along line 2 A-A;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic view of a left valve seat according to the present invention;
FIG. 6 is a right side view of FIG. 5;
FIG. 7 is a left side view of FIG. 5;
FIG. 8 is an enlarged view of a portion of the portion I of FIG. 1;
in the figure: the valve comprises a left valve cover 1, a left valve seat spring 2, a left valve seat sealing ring 3, a left valve seat cavity diversion hole 4, a left diversion valve 5, a valve body 6, an upper valve rod 7, a right diversion valve 8, a right valve seat cavity diversion hole 9, a right valve seat sealing ring 10, a right valve seat spring 11, a right valve cover 12, a left valve seat 13, a right valve seat 14, a left valve seat 15, a left valve seat cavity outside diversion port 16, a left valve seat cavity 17, a left valve seat sealing surface 18, a left valve seat cavity inside diversion port 19, a lower valve rod 20, a valve ball 21, a right valve seat cavity inside diversion port 22, a right valve seat sealing surface 23, a right valve seat cavity 24 and a right valve seat cavity outside diversion port.
Detailed description of the preferred embodiments
The invention is described in further detail below with reference to the accompanying drawings.
The invention comprises a valve body 6, valve covers 1 and 12, valve seats 13 and 14, a valve ball 20, an upper valve rod 7 and a lower valve 19; a valve ball 20 with a through hole is arranged in the valve body 6, the upper end of the valve ball 20 is connected with the upper valve rod 7, the lower end of the valve ball 20 is connected with the lower valve rod 19, the upper and lower valve rods 7 and 19 are arranged on the valve body 6, left and right valve covers 1 and 12 with flow passage holes are arranged on two sides of the valve body 6, left and right valve seats 13 and 14 are respectively arranged in valve seat cavities 16 and 23 of the left and right valve covers 1 and 12 and are positioned on two sides of the valve ball 20, valve seat springs 2 and 11 are arranged at the outer ends of the valve seats 13 and 14, and seals 3 and 10 are arranged between the valve seats 13 and 14 and the valve seat cavities 16 and 23; the valve seat is communicated with a left valve seat cavity 16, a left valve seat cavity flow guide hole 4 is formed, one end of the left valve seat cavity flow guide hole 4 is communicated with the left valve seat cavity 16 at the inner side of the left valve seat sealing ring 3, the other end of the left valve seat cavity flow guide hole 4 is communicated with the left valve seat cavity 16 at the outer side of the left valve seat sealing ring 3, and a left flow guide valve 5 is arranged on the left valve seat cavity flow guide hole 4; the valve seat is communicated with a right valve seat cavity 23, a right valve seat cavity diversion hole 9 is formed, one end of the right valve seat cavity diversion hole 9 is led to the right valve seat cavity 23 on the inner side of the right valve seat sealing ring 10, the other end of the right valve seat cavity diversion hole 9 is led to the right valve seat cavity 23 on the outer side of the right valve seat sealing ring 10, and a right diversion valve 8 is arranged on the right valve seat cavity diversion hole 9. A left valve seat cavity inner diversion port 18 and a left valve seat cavity outer diversion port 15 which are communicated with the left valve seat cavity diversion hole 4 are arranged between the left valve seat cavity 16 and the left valve seat 13 and correspond to two sides of the left valve seat sealing ring 3; between the right valve seat cavity 23 and the right valve seat 14, corresponding to the two sides of the right valve seat sealing ring 10, a right valve seat cavity inner guide port 21 and a right valve seat cavity outer guide port 24 which are communicated with the right valve seat cavity guide hole 9 are arranged. The left and right valve seat chambers 18, 15, 21, 24 are provided between the left and right valve seat chambers 16, 23 and the left and right valves 13, 14, on the left and right valve seats 13, 14, on the left and right valve seat chambers 16, 23, on the left and right valve covers 1, 12, or on the valve body 6. The number of the left valve seat cavity guide holes 4 and the right valve seat cavity guide holes 9 is 1 or more than 1 respectively. The left and right valve seat chamber diversion holes 4, 9 are provided on the left and right valve covers 1, 12, or on the valve body 6 and the valve covers 1, 12. The left and right valve seat chamber diversion holes 4, 9 can be connected to the outside of the ball valve through short pipes. Short pipe connection can be arranged between the left and right valve seat cavity diversion holes 4 and 9 and the left and right diversion valves 5 and 8. The left and right diversion valves 5, 8 are respectively one type structure of left and right, or are one type structure of valve group type structure, multi-way valve type structure, integral structure and upper valve rod 7 transmission (linkage) type structure. The structure can enable the left and right diversion valves 5, 8 to be respectively opened or simultaneously opened. The left and right diversion valves 5, 8 are arranged outside the ball valve, or inside the ball valve, or at different positions, or at the same position.
When the ball valve is opened, the left and right diversion valves 5 and 8 are opened firstly, under the action of the left and right valve seat cavity diversion holes 4 and 9, mediums in the left and right valve seat cavities 16 and 23 are discharged into the downstream pipeline of the ball valve through the left and right valve seat cavities and the outer diversion ports 18, 15, 21 and 24, so that the pressure of the mediums in the left and right valve seat cavities 16 and 23 is smaller than that in the upstream pipeline of the ball valve, then the upper valve rod 7 is rotated to drive the valve ball 20 to rotate 90 degrees, so that the through holes on the valve ball 20 correspond to the flow passage holes of the ball valve, and the ball valve is opened (the acting force of the left and right valve seats 13 and 14 and the valve ball 20 in the opening process of the ball valve is small, so that the torque of the upper valve rod 7 of the ball valve is small when the ball valve is opened, and the sealing surfaces 17 and 22 of the left and the right valve seat 20 are not easy to wear).
When the ball valve is closed, the upper valve rod 7 is rotated in the opposite direction to drive the valve ball 20 to rotate 90 degrees, so that the through hole on the valve ball 20 is staggered with the flow passage hole of the ball valve to close the ball valve, then the left and right diversion valves 5 and 8 are closed, and the left and right valve seat sealing surfaces 17 and 22 on the left and right valve seats 13 and 14 are attached to the valve ball 20 to achieve an ideal sealing effect.
According to the hard sealing ball valve, the torque of the upper valve rod 7 of the ball valve is small under the action of the guide holes 4 and 9 of the left valve seat cavity and the right valve seat cavity and the guide holes 15, 18, 21 and 24 of the left valve seat cavity and the right valve seat cavity, so that the ball valve is conveniently opened, the acting force of the left valve seat 13 and the right valve seat 14 and the valve ball 20 when the ball valve is opened is small, the sealing surfaces 17 and 22 of the left valve seat and the right valve seat and the valve ball 20 are not easy to wear, the work is reliable, the structure is reasonable, the service life is long, and the use and the maintenance are convenient.
Claims (8)
1. A hard seal ball valve comprises a valve body, a valve cover, a valve seat, a valve ball, an upper valve rod and a lower valve rod; the valve body is internally provided with a valve ball with a through hole, the upper end of the valve ball is connected with an upper valve rod, the lower end of the valve ball is connected with a lower valve rod, the upper valve rod and the lower valve rod are arranged on the valve body, the two sides of the valve body are provided with a left valve cover and a right valve cover with flow passage holes, the left valve seat and the right valve seat are respectively arranged in valve seat cavities of the left valve cover and the right valve cover and are positioned at the two sides of the valve ball, the outer end of the valve seat is provided with a valve seat spring, and a sealing ring is arranged between the valve seat and the valve seat cavity; the method is characterized in that: the valve seat is communicated with the left valve seat cavity, a left valve seat cavity diversion hole is formed in the valve seat cavity, one end of the left valve seat cavity diversion hole is led into the left valve seat cavity on the inner side of the left valve seat sealing ring, the other end of the left valve seat cavity diversion hole is led into the left valve seat cavity on the outer side of the left valve seat sealing ring, and a left diversion valve is arranged on the left valve seat cavity diversion hole; the valve seat is provided with a left valve seat cavity, a right valve seat sealing ring and a left valve seat cavity sealing ring, wherein the left valve seat cavity is communicated with the left valve seat cavity; and a right valve seat cavity inner guide port and a right valve seat cavity outer guide port which are communicated with the right valve seat cavity guide hole are arranged between the right valve seat cavity and the right valve seat and correspond to two sides of the right valve seat sealing ring.
2. The hard seal ball valve of claim 1 wherein: the left and right valve seat cavities and the outer guide flow openings are arranged between the left and right valve seat cavities and the left and right valve seats, or on the left and right valve seat cavities, or on the left and right valve covers, or on the valve body.
3. The hard seal ball valve of claim 1 wherein: the number of the left valve seat cavity diversion holes and the right valve seat cavity diversion holes is 1 or more than 1 respectively.
4. The hard seal ball valve of claim 1 wherein: the left valve seat cavity guide holes and the right valve seat cavity guide holes are arranged on the left valve cover and the right valve cover, or are arranged on the valve body and the valve cover.
5. A hard seal ball valve according to claim 1, 3 or 4, wherein: the left and right valve seat chamber pilot holes may be connected to the outside of the ball valve through short pipes.
6. The hard seal ball valve of claim 1 wherein: short pipe connection can be arranged between the left valve seat cavity diversion hole and the right valve seat cavity diversion hole and the left diversion valve and the right diversion valve.
7. The hard seal ball valve of claim 1 wherein: the left and right diversion valves are respectively in a left and right type structure or are in one of a valve group type structure, a multi-way valve type structure and an integral type structure, and an upper valve rod transmission type structure.
8. A hard seal ball valve according to claim 1 or 7, wherein: the left flow guiding valve and the right flow guiding valve are arranged outside the ball valve, or inside the ball valve, or at different positions, or at the same position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711108937.0A CN107842627B (en) | 2017-11-02 | 2017-11-02 | Hard seal ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711108937.0A CN107842627B (en) | 2017-11-02 | 2017-11-02 | Hard seal ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107842627A CN107842627A (en) | 2018-03-27 |
| CN107842627B true CN107842627B (en) | 2024-03-12 |
Family
ID=61682520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711108937.0A Active CN107842627B (en) | 2017-11-02 | 2017-11-02 | Hard seal ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107842627B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115614498A (en) * | 2022-11-10 | 2023-01-17 | 上海瑞控阀门有限公司 | Low-temperature electric control ball valve reliable in sealing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629640A (en) * | 2009-08-12 | 2010-01-20 | 昆山维萨阀门有限公司 | Pilot-operated type hard seal fixing ball valve |
| CN102878316A (en) * | 2012-10-23 | 2013-01-16 | 浙江超达阀门股份有限公司 | Ball valve reliable in sealing and low in opening-closing torque |
| CN103375604A (en) * | 2013-07-23 | 2013-10-30 | 浙江石化阀门有限公司 | Superhigh temperature rigidity seal ball valve |
| CN106286880A (en) * | 2016-09-29 | 2017-01-04 | 江苏神通阀门股份有限公司 | In one, dress declines torque ball valve |
| CN208010963U (en) * | 2017-11-02 | 2018-10-26 | 朱晓丰 | A kind of hard seal ball valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7032880B2 (en) * | 2004-03-22 | 2006-04-25 | Valve Innnovations, L.L.C. | Valve with pressure adaptable seat |
| US20150377366A1 (en) * | 2014-06-30 | 2015-12-31 | Thomas A. Hartman | Ball Valve and Method of Operating the Same |
-
2017
- 2017-11-02 CN CN201711108937.0A patent/CN107842627B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629640A (en) * | 2009-08-12 | 2010-01-20 | 昆山维萨阀门有限公司 | Pilot-operated type hard seal fixing ball valve |
| CN102878316A (en) * | 2012-10-23 | 2013-01-16 | 浙江超达阀门股份有限公司 | Ball valve reliable in sealing and low in opening-closing torque |
| CN103375604A (en) * | 2013-07-23 | 2013-10-30 | 浙江石化阀门有限公司 | Superhigh temperature rigidity seal ball valve |
| CN106286880A (en) * | 2016-09-29 | 2017-01-04 | 江苏神通阀门股份有限公司 | In one, dress declines torque ball valve |
| CN208010963U (en) * | 2017-11-02 | 2018-10-26 | 朱晓丰 | A kind of hard seal ball valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107842627A (en) | 2018-03-27 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211103 Address after: 224713 No. 161, Yanhe Middle Road, Yanhe Town, Jianhu County, Jiangsu Province Applicant after: JIANHU YUXIANG MACHINERY MANUFACTURING Co.,Ltd. Address before: 224700 No. 30, Qianzhuang group, Qianzhuang neighborhood committee, Baota Town, Jianhu County, Yancheng City, Jiangsu Province Applicant before: Zhu Xiaofeng |
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