CN204153211U - A kind of hydraulic pressure bracing type upper-mounting type ball valve - Google Patents
A kind of hydraulic pressure bracing type upper-mounting type ball valve Download PDFInfo
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- CN204153211U CN204153211U CN201420642607.5U CN201420642607U CN204153211U CN 204153211 U CN204153211 U CN 204153211U CN 201420642607 U CN201420642607 U CN 201420642607U CN 204153211 U CN204153211 U CN 204153211U
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Abstract
The utility model provides a kind of hydraulic pressure bracing type upper-mounting type ball valve, comprises valve body, valve ball and valve seat, and valve seat is ring structure; The outer surface of valve seat is provided with valve seat support ring, the outer surface of valve seat support ring is provided with limited ring groove, in limited ring groove, is provided with limited ring; Valve seat and seat ring also surround the spring chamber that is held spring jointly; Valve seat support ring, valve seat and valve body surround a hydraulic pressure ring cavity jointly, and hydraulic pressure ring cavity is also connected with note pressing system.In the utility model, valve seat support ring, valve seat and valve body form an air cylinder structure jointly, utilize extraneous highly pressurised liquid, solve the upper-mounting type ball valve especially online dismounting of heavy caliber upper-mounting type ball valve and maintenance issues, reduce operating cost, improve manufacturing efficiency; Overall structure of the present utility model is comparatively simple, easy to process.
Description
Technical field
The utility model belongs to ball valve field, relates to the online dismounting technology of upper-mounting type ball valve especially heavy caliber upper-mounting type ball valve, a kind of hydraulic pressure bracing type upper-mounting type ball valve specifically.
Background technique
Along with the development of oil, rock gas, chemical engineering industry, pipeline valve more and more adopts upper-mounting type ball valve, and user requires that upper-mounting type ball valve must on-line maintenance.Present upper-mounting type ball valve great majority on the market adopt mechanical type by flange runner hole, pulled open by valve seat, thus ball is taken out warp from body cavity, carry out valve maintenance to both sides.This just requires valve to be removed from pipeline during maintenance, could safeguard, thus lose the function of on-line maintenance, not meet customer requirement.
Model utility content
The purpose of this utility model is to provide a kind of hydraulic pressure bracing type upper-mounting type ball valve, it can utilize the pressure of pressure source to be pushed open to both sides by valve seat by medium online, thus by the middle head of upper-mounting type ball valve, valve ball can be taken out from valve body chamber, thus realize on-line maintenance, for user's maintenance cost saving and man-hour, reduce valve user cost, enhance productivity.
The utility model is achieved through the following technical solutions: hydraulic pressure bracing type upper-mounting type ball valve, comprise valve body, valve ball and valve seat, described valve ball is fixed on the inside of described valve body by two described valve seats, the position contacted on described valve seat, with described valve ball is provided with valve base sealing groove, and described valve base sealing groove internal fixtion has valve base sealing pad; Described valve seat is a ring structure; The outer surface of described valve seat is stairstepping, is respectively first step seat ring, second step seat ring and the 3rd step seat ring; The external diameter of described first step seat ring is less than the external diameter of described second step seat ring, and the external diameter of described second step seat ring is less than the external diameter of described 3rd step seat ring; The outer surface of described second step seat ring offers a closure gasket groove, in described closure gasket groove, is provided with an O-ring seals; The outer surface of described valve seat is provided with a valve seat support ring, the internal surface of described valve seat support ring is stairstepping, be respectively first step valve seat support ring and second step valve seat support ring, the internal diameter of described first step valve seat support ring is less than the internal diameter of described second step valve seat support ring; The internal surface of described first step valve seat support ring contacts with the outer surface of described second step seat ring, and the internal surface of described second step valve seat support ring contacts with the outer surface of described 3rd step seat ring; The outer surface of described valve seat support ring is provided with a limited ring groove, in described limited ring groove, is provided with a limited ring; The width of described limited ring is less than the width of described limited ring groove; The inner surface of described first step valve seat support ring near described second step valve seat support ring direction, the internal surface of described second step valve seat support ring, described 3rd step seat ring together form a spring ring cavity near the inner surface of described second step seat ring and the outer surface of described second step seat ring, are evenly distributed with spring in described spring ring cavity; One end of described spring is fixed on described first step valve seat support ring on the inner surface in described second step valve seat support ring direction, and the other end of described spring is fixed on described 3rd step seat ring on the inner surface of described second step seat ring; Internal surface, the position corresponding with described valve seat and described valve seat support ring of described valve body are set to step shape, be respectively first step valve body, second step valve body, the 3rd step valve body and the 4th step valve body, side surface and the described limited ring of described first step valve body and described second step valve body are suitable; Described 3rd step valve body and described 4th step valve body and described first step seat ring and described second step seat ring suitable; The inside of described second step valve body is provided with a note pressure hole, and the one end in described note pressure hole is connected with a note pressure valve, and the other end in described note pressure hole is connected with the inside of described valve body; The outer surface of described first step valve seat support ring, the outer surface of second step seat ring, the side surface of the 3rd step valve body and second step valve body surround a hydraulic pressure ring cavity jointly.
Preferably, the internal surface of described first step valve seat support ring and the outer surface of first step valve seat support ring offer inner support closure gasket groove and support arm closure gasket groove respectively, and described inner support closure gasket groove and support arm closure gasket groove are provided with O-ring seals; Described support arm closure gasket groove is compared to the outer surface of limited ring groove closer to described first step valve seat support ring.
Preferably, described limited ring comprises at least two group limited ring bodies, and the sectional shape of described limited ring body is circular arc; Described limited ring body comprises the first limited ring body and the second limited ring body; The two ends of described first limited ring body are provided with the first latch closure, and described first ring is buckled and offered counterbore; The two ends of described second limited ring body are provided with the second latch closure, and described second latch closure offers through hole; Described first latch closure and described second latch closure are flexibly connected by a bearing pin.
Preferably, the outer surface of described second step seat ring and the outer surface of described 3rd step seat ring are respectively arranged with valve seat track projection, the internal surface of corresponding described first step valve seat support ring and the internal surface of described second step valve seat support ring offer valve seat track runner respectively; The outer surface of described valve seat support ring offers valve seat bracket track projection, the surface of corresponding described second step valve body offers valve body track runner.
Preferably, two sides of described limited ring groove are respectively arranged with buffer layer, and described buffer layer is rubber projection or rubber ring.
Compared with prior art, its effect is positive to the utility model.
1, the utility model newly-increased valve seat support ring between valve seat and valve body, and existing valve seat construction is improved accordingly, valve body, valve seat and valve seat support ring is made jointly to form an air cylinder structure, utilize extraneous highly pressurised liquid (oils, lipid) etc., make on the one hand valve seat better and valve ball form seal pressure, also solve on the other hand the upper-mounting type ball valve especially online dismounting of heavy caliber upper-mounting type ball valve and maintenance issues, reduce operating cost, improve manufacturing efficiency.
2, the utility model is by the position-limiting action of a limited ring, ensure that the long-term effectiveness of seal pressure between valve seat and valve ball, avoid the decline of the seal pressure caused because of the leakage of black box or the damage of part and then cause the leakage of ball valve, avoiding the danger medium of transporting to leak the person and environmental disruption that cause.
3, the utility model utilizes online pressure source to realize the online dismounting of upper-mounting type ball valve, and can not cause larger infringement to ball valve on the one hand, adaptability is good; Also solve the preparation device of extra high-pressure medium on the other hand, improve the convenience of upper-mounting type ball valve on-line maintenance.
4, the utility model is provided with corresponding track runner and track projection at each moving element place, movement locus is well ensured, the device damage avoiding the moving element track caused because local pressure is uneven to deflect and then cause, improves the reliability that equipment runs.
5, overall structure of the present utility model is comparatively simple, and the split-type structural of the valve seat simultaneously adopted and valve seat support ring also makes course of working more easy, can process the product that precision is higher; Split type structure also makes installation process and maintenance process more simple simultaneously, solves the technical barrier of the online dismounting of bigbore upper-mounting type ball valve.
Accompanying drawing explanation
Fig. 1 is the partial structurtes schematic diagram of the utility model the utility model upper-mounting type ball valve.
Fig. 2 is the overall structure schematic diagram of the utility model limited ring.
Fig. 3 is the structural representation of the utility model limited ring body.
In Fig. 1: 1 is valve body; 2 is valve ball; 3 is valve seat; 4 is valve base sealing pad; 5 is valve seat support ring; 6 is spring; 7 is note pressure hole; 8 is note pressure valve; 9 is hydraulic pressure ring cavity; 101 is first step valve body; 102 is second step valve body; 103 is the 3rd step valve body; 104 is the 4th step valve body; 301 is first step seat ring; 302 is second step seat ring; 303 is the 3rd step seat ring; 304 is closure gasket groove; 305 is O-ring seals; 501 is first step valve seat support ring; 502 is second step valve seat support ring; 503 is limited ring; 5011 is O-ring seals.
In Fig. 2: 503 is limited ring.
In Fig. 3: 5031 is the first limited ring body; 5032 is the second limited ring body; 5033 is the first latch closure; 5034 is the second latch closure; 5035 is bearing pin.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage more become apparent, and are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.
Set forth detail in the following description so that fully understand the utility model.But the utility model can be different from alternate manner described here to implement with multiple, those skilled in the art can when doing similar popularization without prejudice to when the utility model intension.Therefore the utility model is not by the restriction of following public embodiment.
Embodiment one
See Fig. 1, hydraulic pressure bracing type upper-mounting type ball valve, comprises valve body 1, valve ball 2 and valve seat 3, and valve ball 2 is fixed on the inside of valve body 1 by two valve seats 3; The position contacted on valve seat 3, with valve ball 2 is provided with valve base sealing groove, and valve base sealing groove internal fixtion has valve base sealing pad 4; Valve seat 3 is a ring structure; The outer surface of valve seat 3 is stairstepping, is respectively first step seat ring 301, second step seat ring 302 and the 3rd step seat ring 303; The external diameter of first step seat ring 301 is less than the external diameter of second step seat ring 302, and the external diameter of second step seat ring 302 is less than the external diameter of the 3rd step seat ring 303; The outer surface of second step seat ring 302 offers a closure gasket groove 304, in closure gasket groove 304, be provided with an O-ring seals 305; The outer surface of valve seat 3 is provided with valve seat support ring 5, the internal surface of valve seat support ring 5 is stairstepping, be respectively first step valve seat support ring 501 and second step valve seat support ring 502, the internal diameter of first step valve seat support ring 501 is less than the internal diameter of second step valve seat support ring 502; The internal surface of first step valve seat support ring 501 contacts with the outer surface of second step seat ring 302, and the internal surface of second step valve seat support ring 502 contacts with the outer surface of the 3rd step seat ring 303; The outer surface of valve seat support ring 5 is provided with limited ring groove, in limited ring groove, is provided with limited ring 503; The width of limited ring 503 is less than the width of limited ring groove; Internal surface, the 3rd step seat ring 303 of the inner surface of first step valve seat support ring 501 near second step valve seat support ring 502 direction, second step valve seat support ring 502 together form spring ring cavity near the inner surface of second step seat ring 302 and the outer surface of second step seat ring 302, are evenly distributed with spring 6 in spring ring cavity; One end of spring 6 is fixed on first step valve seat support ring 501 on the inner surface in second step valve seat support ring 502 direction, and the other end of spring 6 is fixed on the 3rd step seat ring 303 on the inner surface of second step seat ring 302; Internal surface, the position corresponding with valve seat 3 and valve seat support ring 5 of valve body 1 are set to step shape, be respectively first step valve body 101, second step valve body 102, the 3rd step valve body 103 and the 4th step valve body 104, side surface and the limited ring 503 of first step valve body 101 and second step valve body 102 are suitable; 3rd step valve body 103 and the 4th step valve body 104 and first step seat ring 301 and second step seat ring 302 suitable; The inside of second step valve body 102 is provided with note pressure hole 7, and the one end in note pressure hole 7 is connected with note pressure valve 8, and the other end in note pressure hole 7 is connected with the inside of valve body 1; Side surface and the second step valve body 102 of the outer surface of first step valve seat support ring 501, the outer surface of second step seat ring 302, the 3rd step valve body 103 surround a hydraulic pressure ring cavity 9 jointly.
During assembling, the relevant position of successively putting into valve inner symmetrical by two groups of valve components (valve component is made up of valve seat and valve seat support ring), put into rear hand valve component is pushed open to both sides (now valve component is without any active force), the volume being greater than valve ball in the space between two groups of valve components after pushing open, therefore valve ball can load the inside of valve body easily, each assembly enters into pressurization steps after having placed, namely in note pressure hole, high-pressure medium (as hydraulic oil) is injected by note pressure valve, and then be injected in hydraulic pressure ring cavity, along with injection and the increase of the high-pressure medium in hydraulic pressure ring cavity, move in direction based on the activity principle valve seat support hoop valve ball place of cylinder, the motion of valve seat support ring have compressed spring again, the compressive force of spring makes to establish initial sealing between valve seat and valve ball, when limited ring groove exposes gradually from second step valve body, (this exposes width is that seal pressure as required calculates to reach the width that exposes of corresponding groove, expose the width of width i.e. limited ring), load corresponding limited ring, valve seat and valve ball are fixed, seal pressure is also corresponding to be determined, after location, extract high-pressure medium out by note pressure valve, release the pressure in sealing ring cavity, thus complete the assembling work of upper-mounting type ball valve.
During on-line maintenance dismounting, high-pressure medium (as hydraulic oil) is injected to note pressure hole by note pressure valve, and then be injected in hydraulic pressure ring cavity, along with injection and the increase of the high-pressure medium in hydraulic pressure ring cavity, move in direction based on the activity principle valve seat support hoop valve ball place of cylinder, owing to establishing seal pressure between valve seat and valve ball, therefore need to inject than more high-pressure medium during assembling; The progressively injection of keyed high-pressure medium, limited ring groove can expose to come more more from second step valve body, limited ring groove expose the width that width is greater than limited ring, therefore limited ring loosens, and can take out limited ring easily; Limited ring carries out pressure release after taking out, and now the compressive force of spring is released, and the seal pressure between valve seat and valve ball disappears, and therefore only relies on hand just the both sides of valve component to valve body to be pushed open, takes out the associated components such as valve ball, and keep in repair accordingly; Complete assembling according to step during above-mentioned assembling after having keeped in repair and can make ball valve reliable operation.
Do not leak in order to ensure sealing ring cavity, can offer inner support closure gasket groove and support arm closure gasket groove respectively at the outer surface of the internal surface of first step valve seat support ring 501 and first step valve seat support ring 501, inner support closure gasket groove and support arm closure gasket groove are provided with O-ring seals 5011; Support arm closure gasket groove is compared to the outer surface of limited ring groove closer to first step valve seat support ring 501.
Embodiment two
The present embodiment is that the one of embodiment one is improved, and see Fig. 2 and Fig. 3, limited ring 503 comprises at least two group limited ring bodies, and the sectional shape of limited ring body is circular arc; Limited ring body comprises the first limited ring body 5031 and the second limited ring body 5032; The two ends of the first limited ring body 5031 are provided with on the first latch closure 5033, first latch closure 5033 and offer counterbore; The two ends of the second limited ring body 5032 are provided with on the second latch closure 5034, second latch closure 5034 and offer through hole; First latch closure 5033 and the second latch closure 5034 are flexibly connected by a bearing pin 5035.
Limited ring in the present embodiment have employed split type structure, therefore degree of flexibility is higher, putting into the form that limited ring groove can be a chain, put into limited ring groove and can installation be completed with a bearing pin is fixing, only need to take out bearing pin during taking-up limited ring to be taken out from limited ring groove, simple and convenient.
In order to protect limited ring further in the present embodiment, can be respectively arranged with buffer layer on two of a limited ring groove side, buffer layer can be rubber projection, also can be rubber ring.
Embodiment three
The present embodiment is that the another kind of embodiment one improves, the outer surface of second step seat ring 302 and the outer surface of the 3rd step seat ring 303 are respectively arranged with valve seat track projection, the internal surface of corresponding first step valve seat support ring 501 and the internal surface of second step valve seat support ring 502 offer valve seat track runner respectively; The outer surface of valve seat support ring 5 offers valve seat bracket track projection, the surface of corresponding second step valve body 102 offers valve body track runner.
By being provided with corresponding track runner and track projection, movement locus well being ensured, the device damage avoiding the moving element track caused because local pressure is uneven to deflect and then cause, improve the reliability that equipment runs.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solutions of the utility model; therefore; every content not departing from technical solutions of the utility model; the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all belong to the protection domain of technical solutions of the utility model.
Claims (5)
1. a hydraulic pressure bracing type upper-mounting type ball valve, comprises valve body, valve ball and valve seat, and described valve ball is fixed on the inside of described valve body by two described valve seats, it is characterized in that:
The position contacted on described valve seat, with described valve ball is provided with valve base sealing groove, and described valve base sealing groove internal fixtion has valve base sealing pad;
Described valve seat is a ring structure; The outer surface of described valve seat is stairstepping, is respectively first step seat ring, second step seat ring and the 3rd step seat ring; The external diameter of described first step seat ring is less than the external diameter of described second step seat ring, and the external diameter of described second step seat ring is less than the external diameter of described 3rd step seat ring; The outer surface of described second step seat ring offers a closure gasket groove, in described closure gasket groove, is provided with an O-ring seals;
The outer surface of described valve seat is provided with a valve seat support ring, the internal surface of described valve seat support ring is stairstepping, be respectively first step valve seat support ring and second step valve seat support ring, the internal diameter of described first step valve seat support ring is less than the internal diameter of described second step valve seat support ring; The internal surface of described first step valve seat support ring contacts with the outer surface of described second step seat ring, and the internal surface of described second step valve seat support ring contacts with the outer surface of described 3rd step seat ring; The outer surface of described valve seat support ring is provided with a limited ring groove, in described limited ring groove, is provided with a limited ring; The width of described limited ring is less than the width of described limited ring groove;
The inner surface of described first step valve seat support ring near described second step valve seat support ring direction, the internal surface of described second step valve seat support ring, described 3rd step seat ring together form a spring ring cavity near the inner surface of described second step seat ring and the outer surface of described second step seat ring, are evenly distributed with spring in described spring ring cavity; One end of described spring is fixed on described first step valve seat support ring on the inner surface in described second step valve seat support ring direction, and the other end of described spring is fixed on described 3rd step seat ring on the inner surface of described second step seat ring;
Internal surface, the position corresponding with described valve seat and described valve seat support ring of described valve body are set to step shape, be respectively first step valve body, second step valve body, the 3rd step valve body and the 4th step valve body, side surface and the described limited ring of described first step valve body and described second step valve body are suitable; Described 3rd step valve body and described 4th step valve body and described first step seat ring and described second step seat ring suitable; The inside of described second step valve body is provided with a note pressure hole, and the one end in described note pressure hole is connected with a note pressure valve, and the other end in described note pressure hole is connected with the inside of described valve body; The outer surface of described first step valve seat support ring, the outer surface of second step seat ring, the side surface of the 3rd step valve body and second step valve body surround a hydraulic pressure ring cavity jointly.
2. hydraulic pressure bracing type upper-mounting type ball valve as claimed in claim 1, it is characterized in that: the internal surface of described first step valve seat support ring and the outer surface of first step valve seat support ring offer inner support closure gasket groove and support arm closure gasket groove respectively, and described inner support closure gasket groove and support arm closure gasket groove are provided with O-ring seals; Described support arm closure gasket groove is compared to the outer surface of limited ring groove closer to described first step valve seat support ring.
3. hydraulic pressure bracing type upper-mounting type ball valve as claimed in claim 1, it is characterized in that: described limited ring comprises at least two group limited ring bodies, the sectional shape of described limited ring body is circular arc; Described limited ring body comprises the first limited ring body and the second limited ring body; The two ends of described first limited ring body are provided with the first latch closure, and described first ring is buckled and offered counterbore; The two ends of described second limited ring body are provided with the second latch closure, and described second latch closure offers through hole; Described first latch closure and described second latch closure are flexibly connected by a bearing pin.
4. hydraulic pressure bracing type upper-mounting type ball valve as claimed in claim 1, it is characterized in that: the outer surface of described second step seat ring and the outer surface of described 3rd step seat ring are respectively arranged with valve seat track projection, the internal surface of corresponding described first step valve seat support ring and the internal surface of described second step valve seat support ring offer valve seat track runner respectively; The outer surface of described valve seat support ring offers valve seat bracket track projection, the surface of corresponding described second step valve body offers valve body track runner.
5. hydraulic pressure bracing type upper-mounting type ball valve as claimed in claim 1, is characterized in that: two sides of described limited ring groove are respectively arranged with buffer layer, and described buffer layer is rubber projection or rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642607.5U CN204153211U (en) | 2014-11-02 | 2014-11-02 | A kind of hydraulic pressure bracing type upper-mounting type ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642607.5U CN204153211U (en) | 2014-11-02 | 2014-11-02 | A kind of hydraulic pressure bracing type upper-mounting type ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN204153211U true CN204153211U (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420642607.5U Active CN204153211U (en) | 2014-11-02 | 2014-11-02 | A kind of hydraulic pressure bracing type upper-mounting type ball valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016138709A1 (en) * | 2015-03-04 | 2016-09-09 | 江苏神通阀门股份有限公司 | Top-mounted type ball valve |
| CN106051204A (en) * | 2016-08-03 | 2016-10-26 | 常州大学 | Ultra-large diameter all-welded ball valve sealing structure |
| CN107131317A (en) * | 2017-06-02 | 2017-09-05 | 永嘉县信诚科技服务有限公司 | High-temperature wearable metal sealing electric-controlled ball valve |
| CN113154077A (en) * | 2021-05-07 | 2021-07-23 | 纽托克流体控制有限公司 | Top-mounted type gas storage metal hard sealing ball valve capable of being maintained on line |
| CN114352763A (en) * | 2021-12-27 | 2022-04-15 | 浙江伯特利科技股份有限公司 | Top-mounted cryogenic ball valve and online assembly device and assembly process thereof |
| CN114754159A (en) * | 2021-01-12 | 2022-07-15 | 纳福希（上海）阀门科技有限公司 | Top-mounted ultra-low temperature soft sealing fixed ball valve |
-
2014
- 2014-11-02 CN CN201420642607.5U patent/CN204153211U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016138709A1 (en) * | 2015-03-04 | 2016-09-09 | 江苏神通阀门股份有限公司 | Top-mounted type ball valve |
| CN106051204A (en) * | 2016-08-03 | 2016-10-26 | 常州大学 | Ultra-large diameter all-welded ball valve sealing structure |
| CN107131317A (en) * | 2017-06-02 | 2017-09-05 | 永嘉县信诚科技服务有限公司 | High-temperature wearable metal sealing electric-controlled ball valve |
| CN114754159A (en) * | 2021-01-12 | 2022-07-15 | 纳福希（上海）阀门科技有限公司 | Top-mounted ultra-low temperature soft sealing fixed ball valve |
| CN113154077A (en) * | 2021-05-07 | 2021-07-23 | 纽托克流体控制有限公司 | Top-mounted type gas storage metal hard sealing ball valve capable of being maintained on line |
| CN113154077B (en) * | 2021-05-07 | 2022-06-03 | 纽托克流体控制有限公司 | Top-mounted type gas storage metal hard sealing ball valve capable of being maintained on line |
| CN114352763A (en) * | 2021-12-27 | 2022-04-15 | 浙江伯特利科技股份有限公司 | Top-mounted cryogenic ball valve and online assembly device and assembly process thereof |
| CN114352763B (en) * | 2021-12-27 | 2023-06-16 | 浙江伯特利科技股份有限公司 | Top-mounted cryogenic ball valve, on-line assembly device and assembly process thereof |
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Address after: Song Xiu road Qingpu District Shanghai city 201703 No. 399 Patentee after: Ecoworld Xi (Shanghai) valve technology Co. Ltd. Address before: Song Xiu road Qingpu District Shanghai city 201703 No. 399 Patentee before: Shanghai North America Valve Co., Ltd. |