CN105065682A - Cage sleeve type throttle valve - Google Patents
Cage sleeve type throttle valve Download PDFInfo
- Publication number
- CN105065682A CN105065682A CN201510564286.0A CN201510564286A CN105065682A CN 105065682 A CN105065682 A CN 105065682A CN 201510564286 A CN201510564286 A CN 201510564286A CN 105065682 A CN105065682 A CN 105065682A
- Authority
- CN
- China
- Prior art keywords
- valve
- cage
- valve rod
- tubular frame
- type throttling
- 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.)
- Granted
Links
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
- 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
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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
- 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
- F16K1/42—Valve seats
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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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
- 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
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a cage sleeve type throttle valve which comprises a valve body (14), a valve seat (15) installed in the valve body (14) and a spring (13) installed in a hole of the valve seat (15). A pressing ring (11) is pressed on the valve seat (15) after being connected with the valve body (14), the outer circle of the valve seat (15) is sleeved with a lower inner hole of a cage sleeve (7), and the outer circle of a valve rod (5) is sleeved with an upper inner hole of the cage sleeve (7). A valve deck (6) is installed on the valve body (14) and connected with the valve rod (5) through threads. A cylindrical filtering support (17) is connected with the lower end of the valve deck (6), the upper end of the valve rod (5) is connected with a hand wheel (1), the lower end of the valve rod (5) is connected with the cage sleeve (7), and a cage sleeve balance hole (71) in the cage sleeve (7) is communicated with a valve rod balance hole (51) in the valve rod (5). The cage sleeve type throttle valve is reasonable in structural design, low in noise, resistant to erosion and abrasion and long in service life, and flow can be precisely controlled.
Description
Technical field
The present invention designs a kind of throttle valve, and specific design is steadily a kind of, and noise is little, and flow can accurately control, and erosion resistance is wear-resistant, the cage type throttling valve of long service life.
Background technique
Needle valve throttle valve, disc type throttle valve, cage type throttling valve is mainly contained in the throttle valve of current use, and cage type throttling valve restriction effect is better, but there is following shortcoming in cage type throttling valve at present: with solid particles such as the grains of sand in (1) fluid, the fluid high-speed of mixing directly washes away cage trepanning and valve seat, this can cause cage trepanning and valve seat rapid deterioration, quick abrasion, the life-span is short.(2) cage cover and valve rod are that recessed bond ing or cage overlap with valve rod is one overall, steady and noise is large when causing flow control inaccuracy, throttling.(3) when valve closing, cage cover directly contacts with spool, causes clashing, and causes cage to overlap and damages.Therefore strengthen wear resistance abrasion-resistance that cage type throttling valve valve seat and cage overlap be improve cage type throttling valve working life must by approach.
Therefore, necessary design on the basis of prior art researches and develops a kind of reasonable in design, and operate steadily, noise is little, and flow can accurately control, good seal performance, and erosion resistance is wear-resistant, the cage type throttling valve of long service life.
Summary of the invention
Goal of the invention: the object of the invention is to provide a kind of reasonable in design, operate steadily, noise is little, and flow can accurately control, good seal performance, and erosion resistance is wear-resistant, the cage type throttling valve of long service life.
Technological scheme: in order to realize object of the present invention, the technical solution used in the present invention is:
A kind of cage type throttling valve, it comprises valve body, is arranged on the valve seat in valve body, be arranged on the spring in valve seat orifice, be pressed on valve seat after compression circle and valve body are threaded connection, the lower inner hole sleeve of cage cover is on the cylindrical of valve seat, and the upper inner hole sleeve of cage cover is on the cylindrical of valve rod; Valve gap is arranged on valve body by bolt, and described valve gap is connected with threaded stem; Cartridge filtration support is fixedly connected with valve gap lower end, transparent cover is connected with valve gap upper end, and valve rod upper end is connected with handwheel, and valve rod lower end is overlapped with cage and is connected, the cage cover equalizing orifice that cage puts communicates with the valve rod equalizing orifice on valve rod, is provided with cemented carbide lining in described cage trepanning;
Described cartridge filtration support comprises tubular frame, upper ring washer, lower ring washer and copper cash, described upper ring washer and lower ring washer are arranged on tubular frame respectively, copper cash is arranged in order the outside around tubular frame, tubular frame cylindrical offers tubular frame radial hole and tubular frame cannelure;
The cylindrical of described valve seat offers near longitudinal center line three row throttle orifices.
Preferably, above-described a kind of cage type throttling valve, described valve gap lower end and valve rod joint, be provided with pad, metallic packing ring and back-up ring from top to bottom successively.
Preferably, above-described a kind of cage type throttling valve, described valve rod top is provided with instruction nut, can overlap position play indicative function to cage.
Preferably, above-described a kind of cage type throttling valve, the outer surface of described transparent cover is provided with Pointing sign board.
Preferably, above-described a kind of cage type throttling valve, described valve gap is provided with the Cock screw for fixing stem position, can firm discharge after fixing stem position by Cock screw.
Preferably, above-described a kind of cage type throttling valve, described often row throttle orifice has four decile throttle orifices, and between row and row, throttle orifice is interlaced, and throttle orifice is overlapping and progressively reduce from top to bottom.
A kind of cage type throttling valve specific works process provided by the invention and principle are:
Fluid enters from the right entry of valve body, tubular frame cannelure is entered in the gap of copper cash, enter in tubular frame through tubular frame radial hole again, the gap between copper cash is utilized to filter fluid like this, the wearing and tearing of cage trepanning and valve seat can be reduced, reduce fluid to cage cover and the erosion of valve seat, improve cage type throttling valve working life.And the spring in valve seat makes cage overlap upwards to be pressed on valve rod all the time, when valve closing, cage cover and valve seat can not clash into, steady during throttling, noise is little.
During throttling, rotate clockwise handwheel, band ovable valve stem and cage cover decline, and the area of valve seat throttle orifice reduces gradually, and flow reduces gradually, until throttle orifice closed by cage cover.Rotate counterclockwise handwheel, band ovable valve stem and cage cover rise, and the area of throttle orifice increases gradually, and flow increases gradually, until throttle orifice all to expose flow maximum.When rotation handwheel, when reaching the flow of regulation by the scale observed on Pointing sign board, locking Cock screw, can firm discharge, reaches flow control accurate.
Beneficial effect: compared to the prior art a kind of cage type throttling valve provided by the invention has the following advantages:
Cage type throttling valve provided by the invention, reasonable in design, operates steadily, and noise is little, and flow can accurately control, good seal performance, and erosion resistance is wear-resistant, long service life.
This throttle valve filters fluid by gap between tubular frame and copper cash, can realize the erosion resistance of cage trepanning and valve seat, wear-resistant, raising throttle valve working life.Spring in valve seat makes cage overlap upwards to be pressed on all the time on valve rod, and when valve closing, cage cover and valve seat can not clash into, steady during throttling, noise is little and flow control is accurate.The ordered arrangement of throttle orifice on valve seat, the reduction of flow continuous and stable when realizing throttling.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of cage type throttling valve of the present invention.
Fig. 2 is the structural representation of the amplification of I part in Fig. 1.
Fig. 3 is the distribution schematic diagram of throttle orifice on valve seat.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
As depicted in figs. 1 and 2, a kind of cage type throttling valve, it comprises valve body (14), be arranged on the valve seat (15) in valve body (14), be arranged on the spring (13) in valve seat (15) hole, compressing after circle (11) is threaded connection with valve body (14) is pressed on valve seat (15), the lower inner hole sleeve of cage cover (7) is on the cylindrical of valve seat (15), and the upper inner hole sleeve of cage cover (7) is on the cylindrical of valve rod (5); Valve gap (6) is arranged on valve body (14) by bolt, and described valve gap (6) is threaded with valve rod (5); Cartridge filtration support (17) is fixedly connected with valve gap (6) lower end, transparent cover (4) is connected with valve gap (6) upper end, valve rod (5) upper end is connected with handwheel (1), valve rod (5) lower end is connected with cage cover (7), cage cover equalizing orifice (71) on cage cover (7) communicates with the valve rod equalizing orifice (51) on valve rod (5), is provided with cemented carbide lining (16) in described cage cover (7) hole;
Described cartridge filtration support (17) comprises tubular frame (8), upper ring washer (18), lower ring washer (10) and copper cash (9), described upper ring washer (18) and lower ring washer (10) are arranged on tubular frame (8) respectively, described upper ring washer (18) and lower ring washer (10) are arranged on tubular frame (8) respectively, copper cash (9) is arranged in order the outside around tubular frame (8), tubular frame (8) cylindrical offers tubular frame radial hole (81) and tubular frame cannelure (82);
The cylindrical of described valve seat (15) offers three row throttle orifices near longitudinal center line.
Above-described cage type throttling valve, described valve gap (6) lower end and valve rod (5) joint, be provided with pad (21), metallic packing ring (20) and back-up ring (19) from top to bottom successively.
Above-described cage type throttling valve, described valve rod (5) top is provided with instruction nut (3), and the outer surface of transparent cover (4) is provided with Pointing sign board (2).
Above-described cage type throttling valve, described valve gap (6) is provided with the Cock screw (22) for fixing valve rod (5) position.
As shown in Figure 3, the cylindrical of valve seat (15) offers near longitudinal center line three row throttle orifices, described often row throttle orifice has four decile throttle orifices, and between row and row, throttle orifice is interlaced, and throttle orifice is overlapping and progressively reduce from top to bottom.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a cage type throttling valve, it is characterized in that, it comprises valve body (14), be arranged on the valve seat (15) in valve body (14), be arranged on the spring (13) in valve seat (15) hole, compressing after circle (11) is threaded connection with valve body (14) is pressed on valve seat (15), the lower inner hole sleeve of cage cover (7) is on the cylindrical of valve seat (15), and the upper inner hole sleeve of cage cover (7) is on the cylindrical of valve rod (5); Valve gap (6) is arranged on valve body (14) by bolt, and described valve gap (6) is threaded with valve rod (5); Cartridge filtration support (17) is fixedly connected with valve gap (6) lower end, transparent cover (4) is connected with valve gap (6) upper end, valve rod (5) upper end is connected with handwheel (1), valve rod (5) lower end is connected with cage cover (7), cage cover equalizing orifice (71) on cage cover (7) communicates with the valve rod equalizing orifice (51) on valve rod (5), is provided with cemented carbide lining (16) in described cage cover (7) hole;
Described cartridge filtration support (17) comprises tubular frame (8), upper ring washer (18), lower ring washer (10) and copper cash (9), described upper ring washer (18) and lower ring washer (10) are arranged on tubular frame (8) respectively, copper cash (9) is arranged in order the outside around tubular frame (8), tubular frame (8) cylindrical offers tubular frame radial hole (81) and tubular frame cannelure (82);
The cylindrical of described valve seat (15) offers three row throttle orifices near longitudinal center line.
2. a kind of cage type throttling valve according to claim 1, it is characterized in that, described valve gap (6) lower end and valve rod (5) joint, be provided with pad (21), metallic packing ring (20) and back-up ring (19) from top to bottom successively.
3. a kind of cage type throttling valve according to claim 1, is characterized in that, described valve rod (5) top is provided with instruction nut (3).
4. a kind of cage type throttling valve according to any one of claims 1 to 3, is characterized in that, the outer surface of described transparent cover (4) is provided with Pointing sign board (2).
5. a kind of cage type throttling valve according to claim 4, is characterized in that, described valve gap (6) is provided with the Cock screw (22) for fixing valve rod (5) position.
6. a kind of cage type throttling valve according to claim 4, is characterized in that, described often row throttle orifice has four decile throttle orifices, and between row and row, throttle orifice is interlaced, and throttle orifice is overlapping and progressively reduce from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510564286.0A CN105065682B (en) | 2015-09-07 | 2015-09-07 | A kind of cage type throttling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510564286.0A CN105065682B (en) | 2015-09-07 | 2015-09-07 | A kind of cage type throttling valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105065682A true CN105065682A (en) | 2015-11-18 |
| CN105065682B CN105065682B (en) | 2017-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510564286.0A Active CN105065682B (en) | 2015-09-07 | 2015-09-07 | A kind of cage type throttling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105065682B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191606A (en) * | 2017-05-18 | 2017-09-22 | 华中科技大学 | It is a kind of accurately to continuously adjust the choke valve of Working fluid flow resistance |
| CN107327609A (en) * | 2017-07-03 | 2017-11-07 | 常熟市虞菱机械有限责任公司 | A kind of many turning valve manual driving devices of visual stem position |
| CN107990011A (en) * | 2017-11-28 | 2018-05-04 | 美尚生态景观股份有限公司 | A kind of throttle valve |
| CN109185468A (en) * | 2018-11-29 | 2019-01-11 | 美钻深海能源科技研发（上海）有限公司 | A kind of manual cage set throttle valve with valve position transmitter |
| CN109538161A (en) * | 2018-12-27 | 2019-03-29 | 中国石油集团西部钻探工程有限公司 | Filtering type double containment fixed restrictive valve |
| WO2021082713A1 (en) * | 2019-10-31 | 2021-05-06 | 江苏金石机械集团有限公司 | Fixed throttle valve for sand control |
| CN112855961A (en) * | 2020-12-31 | 2021-05-28 | 江苏信得石油机械股份有限公司 | Outer bushing type cage sleeve throttling valve for oil conveying pipeline |
| CN114413000A (en) * | 2022-02-14 | 2022-04-29 | 西派集团有限公司 | Straight-through cage type throttle valve |
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| US4041982A (en) * | 1976-01-09 | 1977-08-16 | Kieley & Mueller, Inc. | Double wall plug control valve |
| FR2568971B1 (en) * | 1984-08-07 | 1987-01-09 | Bertin & Cie | VALVE DEVICE FOR PARTICULARLY STEAM FLUID OR OTHER HOT OR CORROSIVE GAS |
| US5431188A (en) * | 1994-03-25 | 1995-07-11 | Master Flo Valve, Inc. | Flow trim for choke |
| CN201875164U (en) * | 2010-10-15 | 2011-06-22 | 王元清 | High-pressure-difference labyrinth multi-stage pressure reducing throttle stop valve |
| CN102392617A (en) * | 2011-10-11 | 2012-03-28 | 西南石油大学 | Multistage throttle valve |
| CN103343836A (en) * | 2013-07-29 | 2013-10-09 | 天津奥美自动化系统有限公司 | Hedging-type cavitation-resistant valve cage as well as regulating valve with valve cage |
| CN103912691A (en) * | 2014-04-21 | 2014-07-09 | 天津诺威流体控制科技有限公司 | Balancing type adjusting valve |
| CN204961841U (en) * | 2015-09-07 | 2016-01-13 | 盐城工学院 | Cage type throttling valve |
-
2015
- 2015-09-07 CN CN201510564286.0A patent/CN105065682B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041982A (en) * | 1976-01-09 | 1977-08-16 | Kieley & Mueller, Inc. | Double wall plug control valve |
| FR2568971B1 (en) * | 1984-08-07 | 1987-01-09 | Bertin & Cie | VALVE DEVICE FOR PARTICULARLY STEAM FLUID OR OTHER HOT OR CORROSIVE GAS |
| US5431188A (en) * | 1994-03-25 | 1995-07-11 | Master Flo Valve, Inc. | Flow trim for choke |
| CN201875164U (en) * | 2010-10-15 | 2011-06-22 | 王元清 | High-pressure-difference labyrinth multi-stage pressure reducing throttle stop valve |
| CN102392617A (en) * | 2011-10-11 | 2012-03-28 | 西南石油大学 | Multistage throttle valve |
| CN103343836A (en) * | 2013-07-29 | 2013-10-09 | 天津奥美自动化系统有限公司 | Hedging-type cavitation-resistant valve cage as well as regulating valve with valve cage |
| CN103912691A (en) * | 2014-04-21 | 2014-07-09 | 天津诺威流体控制科技有限公司 | Balancing type adjusting valve |
| CN204961841U (en) * | 2015-09-07 | 2016-01-13 | 盐城工学院 | Cage type throttling valve |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191606A (en) * | 2017-05-18 | 2017-09-22 | 华中科技大学 | It is a kind of accurately to continuously adjust the choke valve of Working fluid flow resistance |
| CN107191606B (en) * | 2017-05-18 | 2019-06-11 | 华中科技大学 | A kind of throttle valve that can accurately continuously adjust Working fluid flow resistance |
| CN107327609A (en) * | 2017-07-03 | 2017-11-07 | 常熟市虞菱机械有限责任公司 | A kind of many turning valve manual driving devices of visual stem position |
| CN107990011A (en) * | 2017-11-28 | 2018-05-04 | 美尚生态景观股份有限公司 | A kind of throttle valve |
| CN107990011B (en) * | 2017-11-28 | 2019-05-17 | 美尚生态景观股份有限公司 | A kind of throttle valve |
| CN109185468A (en) * | 2018-11-29 | 2019-01-11 | 美钻深海能源科技研发（上海）有限公司 | A kind of manual cage set throttle valve with valve position transmitter |
| CN109538161A (en) * | 2018-12-27 | 2019-03-29 | 中国石油集团西部钻探工程有限公司 | Filtering type double containment fixed restrictive valve |
| WO2021082713A1 (en) * | 2019-10-31 | 2021-05-06 | 江苏金石机械集团有限公司 | Fixed throttle valve for sand control |
| CN112855961A (en) * | 2020-12-31 | 2021-05-28 | 江苏信得石油机械股份有限公司 | Outer bushing type cage sleeve throttling valve for oil conveying pipeline |
| CN112855961B (en) * | 2020-12-31 | 2022-08-12 | 江苏信得石油机械股份有限公司 | Outer bushing type cage sleeve throttling valve for oil conveying pipeline |
| CN114413000A (en) * | 2022-02-14 | 2022-04-29 | 西派集团有限公司 | Straight-through cage type throttle valve |
| CN114413000B (en) * | 2022-02-14 | 2023-01-31 | 西派集团有限公司 | Straight-through cage sleeve type throttle valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105065682B (en) | 2017-07-07 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20151118 Assignee: Jiangsu Hongtai Petrochemical Machinery Co., Ltd. Assignor: Yangcheng Institute of Technology Contract record no.: 2017320000204 Denomination of invention: Cage sleeve type throttle valve Granted publication date: 20170707 License type: Exclusive License Record date: 20171212 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211222 Address after: 224041 Gougang Industrial Park, Wuyou street, Yannan high tech Zone, Yancheng City, Jiangsu Province Patentee after: JIANGSU TIANFULONG ANTI-CORROSION EQUIPMENT CO.,LTD. Address before: 224051 No. 1 hope road middle road, Ting Hu District, Yancheng City, Jiangsu Patentee before: YANCHENG INSTITUTE OF TECHNOLOGY |