CN107631050B - A kind of valve - Google Patents
A kind of valve Download PDFInfo
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- CN107631050B CN107631050B CN201711079846.9A CN201711079846A CN107631050B CN 107631050 B CN107631050 B CN 107631050B CN 201711079846 A CN201711079846 A CN 201711079846A CN 107631050 B CN107631050 B CN 107631050B
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Abstract
The invention discloses a kind of valves, are related to valve technology field, include at least a main valve, are set on the side link arm of the main valve there are one a releasing device is respectively provided on releasing device or both sides link arm, the releasing device is connected with main valve；The releasing device is from top to bottom followed successively by diffusion valve, desorption tube, diffuses interface, between the diffusion valve and desorption tube and desorption tube and diffusing is connected by an electric melting sleeve between interface, the interface that diffuses is integrally formed and is connected to the link arm of main valve, described diffuse is equipped with a sealing device in interface, the sealing device includes an embedded casing and a movable sealing plug.The present invention in order to solve the problems, such as ball valve that existing band diffuses for releasing device without self-test sealing performance function, propose a kind of thering is that self-test sealing performance and capable of being blocked when without using bleeding device diffused interface diffuses ball valve for releasing device.
Description
Technical field
The present invention relates to valve technology fields more particularly to a kind of with the PE valves diffused.
Background technology
In gas ductwork, PE ball valves play the on-off action in pipe gas transmission process, and running pipeline usually needs
The fuel gas transmission in downstream is controlled by the switch of valve.PE valves are with corrosion-resistant, non-maintaining, keying torque is small, valve
The advantages that light-weight, in installation, and has convenient in carrying, welds the advantages such as simple.Common PE ball valves have common PE
Ball valve, PE are mono- to diffuse ball valve and PE double-diffusing ball valves.Existing PE double-diffusing ball valves can be found in following patent：Patent name is
" double block double-diffusing ball valve ", Authorization Notice No. CN202719177U, authorized announcement date are on 2 6th, 2013.In ball valve two
A bleeding device respectively is arranged for side and the bleeding device is connected to ball valve body inner cavity, can be not only used for ball valve pressure release, it is also possible to
Branch is drawn in pipeline.Since bleeding device is assembled by multiple parts weldings, weld has in the presence of the possibility leaked, so ball
It is both needed to detect by sealing performance before valve manufacture and before installation, it is ensured that safety when use, still, existing PE is bis- to be diffused
Mechanism of the ball valve for bleeding device without included detection leakage is then needed if you need to detect by customizing special equipment, this not only will
Larger device fabrication expense is generated, also, is gone with a small amount of equipment to detect a large amount of ball valve, efficiency is more low.
Invention content
The present invention is in order to solve the asking without self-test sealing performance function for releasing device for the ball valve that existing band diffuses
Topic proposes that a kind of releasing device that is directed to has the function of self-test sealing performance and can block to diffuse when without using bleeding device to connect
Mouth diffuses ball valve.
To achieve the goals above, the present invention uses following technical scheme：A kind of valve includes at least a main valve, institute
It states and is respectively provided with a releasing device, the releasing device on releasing device or both sides link arm there are one being set on the side link arm of main valve
It is connected with main valve；The releasing device is from top to bottom followed successively by diffusion valve, desorption tube, diffuses interface, the diffusion valve with put
Between separate tube and desorption tube and diffusing is connected by an electric melting sleeve between interface, the company for diffusing interface and main valve
Arm is integrally formed and is connected to, and described diffuse is equipped with a sealing device in interface, the sealing device includes an embedded casing and one
Movable sealing plug, the outer wall of the embedded casing and the inner wall sealing for diffusing interface coordinate, and the endoporus of embedded casing is divided into interior spiral shell
Line section and smooth section, internal thread segment is located on the upside of smooth section and the diameter of internal thread segment is less than the diameter of smooth section；The activity
Sealing-plug is divided into external thread section and seal section, and external thread section is located on the upside of seal section；In a tubular form, inside is pore to external thread section,
Outer wall is equipped with external screw thread, and several through-holes are offered on the tube wall of external thread section；The external thread section of the movable sealing plug and institute
The internal thread segment for stating embedded casing screws togather, the seal section can switch between main valve inner cavity and smooth section sliding and can with it is smooth
Duan Shixian is sealed.
Preferably, the seal section is cylindrical, the central axis of seal section is overlapped with the central axis of external thread section,
Seal section outer wall is circumferentially equipped at least one sealing ring locating slot, and O-ring seal is equipped in the sealing ring locating slot.
Preferably, the seal section outer wall is circumferentially equipped with two sealing ring locating slots, two sealing ring locating slot institutes
Plane with seal section central axis upright.
Preferably, the seal section bottom is set, there are one the interior hexagonal grooves that can coordinate with allen wrench.
Preferably, being equipped with internal thread at diffusion valve upper end opening on the releasing device；The seal section upper end is set
There are one polygonal grooves；The sealing device further includes a dismountable sealing-plug lead agency, and the sealing-plug drives
Mechanism includes a fixing seal seat and a rotating bar, and being equipped on the outside of the fixing seal seat can be with the screw-internal thread fit on diffusion valve
External screw thread, inside is equipped with through hole along central axis, sealing ring is coaxially provided in the through hole, and the rotating bar passes through solid
Determine the through hole on seal receptacle and seal with fixing seal seat to coordinate, the rotating bar can be slided along the through hole on fixing seal seat
Dynamic and rotation；The rotating bar lower end is equipped with the polygon that can be plugged together with seal section upper end polygonal grooves and starts.
Preferably, the fixing seal seat is equipped with the sealing ring for realizing sealing with diffusion valve upper end opening.
Preferably, the rotating bar upper end is equipped with the spanner for twisting rotating bar.
Preferably, the external thread section inner wall of the movable sealing plug is equipped with filter layer.
Therefore, the present invention has the advantages that：1, it is equipped with sealing device in the releasing device of ball valve, can be used in certainly
Examine the leakproofness of releasing device；2, when ball valve is without using bleeding device, sealing device can be used to block for a long time and diffuse interface,
Further ensure that combustion gas will not be leaked from bleeding device；3, it is provided with dismountable sealing-plug lead agency, it being capable of auxiliary seal
Device is sealed test and may be reused.
Description of the drawings
Fig. 1 is the schematic diagram that the present invention singly diffuses ball valve.
Fig. 2 is the schematic diagram of double-diffusing ball valve of the present invention.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the enlarged diagram at a in Fig. 1 or Fig. 2.
Fig. 5 is the enlarged diagram at c in Fig. 4.
Fig. 6 is the structural schematic diagram that casing is embedded in the present invention.
Fig. 7 is the structural schematic diagram of movable sealing plug in the present invention.
Fig. 8 is the enlarged diagram at b in Fig. 1 or Fig. 2.
Fig. 9 is the front view of sealing-plug lead agency in the present invention.
Figure 10 is the schematic diagram that the present invention is sealed test mode using sealing-plug lead agency.
Figure 11 is the enlarged diagram that the embedded casing of the present invention realizes sealing state with movable sealing plug.
1：Main valve；101：Link arm；2：Releasing device；201：Diffusion valve；202：Desorption tube；203：Diffuse interface；204：It is interior
Screw thread；3：Electric melting sleeve；4：Sealing device；401：Embedded casing；402：Movable sealing plug；403：Internal thread segment；404：It is smooth
Section；405：External thread section；406：Seal section；407：Through-hole；408：O-ring seal；409：Interior hexagonal groove；410：Polygon is recessed
Slot；411：Filter layer；5：Sealing-plug lead agency；501：Fixing seal seat；502：Rotating bar；503：Through hole；504：Outer spiral shell
Line；505：Sealing ring；506：Polygon is started；507：Spanner.
Specific implementation mode
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one：
A kind of valve, the valve are singly to diffuse ball valve, referring to Fig. 1, include at least a main valve 1,1 both sides of the main valve are
Link arm 101 is set on 1 side link arm 101 of main valve there are one releasing device 2, and the releasing device 2 is connected with main valve 1；It is described to put
It dissipates mechanism 2 be from top to bottom followed successively by diffusion valve 201, desorption tube 202, diffuse interface 203, the diffusion valve 201 and desorption tube 202
Between and desorption tube 202 and diffusing connected by an electric melting sleeve 6 between interface 203, it is described diffuse interface 203 with it is main
The link arm of valve 1 is integrally formed and is connected to, and described diffuse is equipped with a sealing device 4 in interface 203, as shown in Figure 4, Figure 5, described close
Seal apparatus 4 include an embedded casing 401 and a movable sealing plug 402, the outer wall of the embedded casing 401 with diffuse interface 203
Inner wall sealing cooperation, the endoporus of embedded casing 401 is divided into internal thread segment 403 and smooth section 404, as shown in fig. 6, internal thread segment
403 diameter positioned at 404 upside of smooth section and internal thread segment 403 is less than the diameter of smooth section 404；The movable sealing plug 402
It is divided into external thread section 405 and seal section 406, as shown in fig. 7, external thread section 405 is located at 406 upside of seal section；External thread section 405
In a tubular form, internal is pore, and outer wall is equipped with external screw thread, and several through-holes 407 are offered on the tube wall of external thread section 405, described
Filter layer 411 is additionally provided on 405 inner wall of external thread section of movable sealing plug 402, through-hole 407 is for inside and outside movable sealing plug 402
Gas connection, the filter layer 411 on inner wall is for the impurity in gas inside and outside filtering activities sealing-plug 402；The movable sealing
The external thread section 405 and the internal thread segment 403 of the embedded casing 401 of plug 402 screw togather, and the seal section 406 can be in main valve 1
Switching is slided and can be realized with smooth section 404 and sealed between chamber and smooth section 404.
The seal section 406 is cylindrical, and the central axis of seal section 406 is overlapped with the central axis of external thread section 405,
406 outer wall of seal section is circumferentially equipped with two sealing ring locating slots, and O-ring seal 408 is equipped in the sealing ring locating slot,
As shown in fig. 7,406 bottom of the seal section is set there are one the interior hexagonal groove 409 that can coordinate with allen wrench, upper end is equipped with
One polygonal grooves 410.Operating personnel can stretch into hand in 1 channel of main valve, pass through mating allen wrench and seal section
The interior hexagonal groove 409 of 406 bottoms plugs together, rotary moveable sealing-plug 402.
Internal thread 204 is equipped at 201 upper end opening of diffusion valve on the releasing device 2, as shown in figure 8, the sealing
Device 4 further includes a dismountable sealing-plug lead agency 5, as shown in figure 9, the sealing-plug lead agency 5 includes one solid
Determine seal receptacle 501 and a rotating bar 502, the fixing seal seat 501 is in up big and down small ladder shaft-like, and shaft section is in T shape,
Be equipped with the external screw thread 504 that can coordinate with the internal thread 204 on diffusion valve on the outside of downside small column, interface be equipped with for put
The sealing ring 505 that valve upper end opening realizes sealing is dissipated, 501 inside of fixing seal seat is equipped with through hole 503 along central axis, described
Be coaxially provided with sealing ring in through hole 503, the rotating bar 502 pass through the through hole 503 on fixing seal seat 501 and with fixation
The sealing cooperation of seal receptacle 501, the rotating bar 502 can be slided and be rotated along the through hole 503 on fixing seal seat 501；It is described
502 lower end of rotating bar is equipped with the polygon that can be plugged together with 406 upper end polygonal grooves 410 of seal section and starts 506, and upper end, which is equipped with, to be used
In the spanner 507 of twisting rotating bar 502.
Embodiment two：
A kind of valve, the valve are double-diffusing ball valve, referring to Fig. 2, Fig. 3, include at least a main valve 1,1 liang of the main valve
Side is link arm 101, is respectively provided with a releasing device 2 on 1 both sides link arm 101 of main valve, the releasing device 2 is connected with main valve 1；
The releasing device 2 is from top to bottom followed successively by diffusion valve 201, desorption tube 202, diffuses interface 203, the diffusion valve 201 with put
Between separate tube 202 and desorption tube 202 and diffusing is connected by an electric melting sleeve 6 between interface 203, described to diffuse interface
203 are integrally formed and are connected to the link arm of main valve 1, and two diffusing for releasing device 2 are respectively provided with a sealing device 4 in interface 203,
The sealing device 4 includes an embedded casing 401 and a movable sealing plug 402, and the outer wall of the embedded casing 401 connects with diffusing
The inner wall sealing cooperation of mouth 203, the endoporus of embedded casing 401 are divided into internal thread segment 403 and smooth section 404, internal thread segment 403
Diameter in 404 upside of smooth section and internal thread segment 403 is less than the diameter of smooth section 404；It is outer that the movable sealing plug 402, which divides,
Thread segment 405 and seal section 406, external thread section 405 are located at 406 upside of seal section；In a tubular form, inside is pipe to external thread section 405
Hole, outer wall is equipped with external screw thread, and several through-holes 407 are offered on the tube wall of external thread section 405, the movable sealing plug 402
It is additionally provided with filter layer 411 on 405 inner wall of external thread section, through-hole 407 is for gas connection inside and outside movable sealing plug 402, on inner wall
Filter layer 411 for the impurity in gas inside and outside filtering activities sealing-plug 402；The external thread section of the movable sealing plug 402
405 screw togather with the internal thread segment 403 of the embedded casing 401, the seal section 406 can 1 inner cavity of main valve and smooth section 404 it
Between switching sliding and can with smooth section 404 realize sealing.
The seal section 406 is cylindrical, and the central axis of seal section 406 is overlapped with the central axis of external thread section 405,
406 outer wall of seal section is circumferentially equipped with two sealing ring locating slots, and O-ring seal 408 is equipped in the sealing ring locating slot,
As shown in fig. 6,406 bottom of the seal section is set there are one the interior hexagonal groove 409 that can coordinate with allen wrench, upper end is equipped with
One polygonal grooves 410.Operating personnel can stretch into hand in 1 channel of main valve, pass through mating allen wrench and seal section
The interior hexagonal groove 409 of 406 bottoms plugs together, rotary moveable sealing-plug 402.
It is equipped with internal thread 204 at 201 upper end opening of diffusion valve on the releasing device 2, the sealing device 4 also wraps
A dismountable sealing-plug lead agency 5 is included, the sealing-plug lead agency 5 is rotated including a fixing seal seat 501 and one
Bar 502, the fixing seal seat 501 are in up big and down small ladder shaft-like, and shaft section is in T shape, are equipped on the outside of the small column of downside
The external screw thread 504 that can coordinate with the internal thread 204 on diffusion valve, interface are equipped with close for being realized with diffusion valve upper end opening
The sealing ring 505 of envelope, 501 inside of fixing seal seat are equipped with through hole 503 along central axis, are coaxially set in the through hole 503
There are sealing ring, the rotating bar 502 to pass through the through hole 503 on fixing seal seat 501 and match with the sealing of fixing seal seat 501
It closes, the rotating bar 502 can be slided and be rotated along the through hole 503 on fixing seal seat 501；502 lower end of the rotating bar is set
There is the polygon that can be plugged together with 406 upper end polygonal grooves 410 of seal section to start 506, upper end is equipped with for twisting rotating bar 502
Spanner 507.
For above-mentioned two embodiment, the present invention can carry out following experiments of sealing performance：
A. valve can carry out the self-checking of following sealing performance before installing and using：Close diffusion valve 201, operator
Member stretches into hand in 1 channel of main valve, passes through in 406 bottom of seal section in mating allen wrench and releasing device 2 six
Angle groove 409 plugs together, rotary moveable sealing-plug 402, and the rotation of movable sealing plug 402 rises, when the seal section of movable sealing plug 402
After 406 enter the smooth section 404 for embedding casing 401, sealing is realized between seal section 406 and smooth section 404, as shown in figure 11,
Movable sealing plug 402 continues to rise, and 2 inner chamber gas of releasing device of 406 upside of seal section is squeezed, and atmospheric pressure value becomes larger, and can
Lifting position by adjusting movable sealing plug 402 controls the atmospheric pressure value of intracavitary in releasing device 2.Activity of then stopping rotating is close
Blocking 402 stands pressurize for a period of time, then goes to open diffusion valve 201, if still there is larger air-flow intracavitary out of releasing device 2
Outflow then illustrates the parts welding No leakage on releasing device 2；, whereas if opening diffusion valve 201, airless is from diffusing
Intracavitary flows out in mechanism 2, then illustrates the parts weld on the communicating pipe 4 on releasing device 2 or a certain parts itself
There are leakage points；
B. valve after installation is complete, can carry out the self-checking of following sealing performance：Open diffusion valve 201；Operator
Member stretches into the rotating bar 502 of sealing-plug lead agency 5 from 201 upper end opening of diffusion valve, until 502 lower end of rotating bar is more
Side shape is started 506 to be plugged together with the polygonal grooves 410 of 2 interior sealing section of releasing device, 406 upper end, then by the sealing-plug lead agency
External screw thread 504 on 5 fixing seal seat 501 is screwed togather fixed and is realized close with the internal thread 204 at 201 upper end opening of diffusion valve
Envelope, as shown in Figure 10.Then rotating bar 502 is twisted by shaking spanner 507, movable sealing plug 402 is revolved with rotating bar 502
Turn, the rotation of movable sealing plug 402 rises, when the seal section 406 of movable sealing plug 402 enters the smooth section 404 of embedded casing 401
Afterwards, realize that sealing, movable sealing plug 402 continue to rise between seal section 406 and smooth section 404,406 upside of seal section is diffused
The gas of intracavitary is squeezed in mechanism 2, and atmospheric pressure value becomes larger, and can be put by adjusting the lifting position control of movable sealing plug 402
Dissipate the atmospheric pressure value of intracavitary in mechanism 2.Then stop rotating movable sealing plug 402, stands pressurize for a period of time, then remove Unscrew
Fixing seal seat 501 illustrates the parts in releasing device 2 if still there is larger air-flow intracavitary out of releasing device 2 to flow out
Weld No leakage；, whereas if opening fixing seal seat 501, airless intracavitary out of releasing device 2 flows out, then explanation is diffused
There are leakage points for parts weld or a certain parts itself in mechanism 2.
Claims (7)
1. a kind of valve, a main valve is included at least, sets that there are one releasing devices or both sides to connect on the side link arm of the main valve
A releasing device is respectively provided on arm, the releasing device is connected with main valve；The releasing device, which is from top to bottom followed successively by, to be put
It dissipates valve, desorption tube, diffuse interface, between the diffusion valve and desorption tube and desorption tube and diffuse between interface by one
Electric melting sleeve connects, and the interface that diffuses is integrally formed and is connected to the link arm of main valve, it is characterised in that：It is described to diffuse in interface
Equipped with a sealing device, the sealing device include an embedded casing and a movable sealing plug, the outer wall of the embedded casing and
The inner wall sealing cooperation of interface is diffused, the endoporus of embedded casing is divided into internal thread segment and smooth section, and internal thread segment is located at smooth section
The diameter of upside and internal thread segment is less than the diameter of smooth section；The movable sealing plug is divided into external thread section and seal section, outer spiral shell
Line section is located on the upside of seal section；In a tubular form, inside is pore to external thread section, and outer wall is equipped with external screw thread, and the tube wall of external thread section
On offer several through-holes；The external thread section of the movable sealing plug and the internal thread segment of the embedded casing screw togather, described close
Envelope section, which can switch sliding between main valve inner cavity and smooth section and can be realized with smooth section, to be sealed；
Internal thread is equipped at diffusion valve upper end opening on the releasing device；The seal section upper end set there are one polygon it is recessed
Slot；The sealing device further includes a dismountable sealing-plug lead agency, and the sealing-plug lead agency includes a fixation
Seal receptacle and a rotating bar, the fixing seal seat outside is equipped with can be with the external screw thread of the screw-internal thread fit on diffusion valve, inside
It is equipped with through hole along central axis, sealing ring is coaxially provided in the through hole, the rotating bar passes through on fixing seal seat
Through hole and with fixing seal seat seal coordinate, the rotating bar can along the through hole on fixing seal seat slide and rotate；Institute
Rotating bar lower end is stated to start equipped with the polygon that can be plugged together with seal section upper end polygonal grooves.
2. a kind of valve according to claim 1, it is characterised in that：The seal section is cylindrical, the center of seal section
Axis is overlapped with the central axis of external thread section, and seal section outer wall is circumferentially equipped at least one sealing ring locating slot, described close
It is equipped with O-ring seal in seal locating slot.
3. a kind of valve according to claim 2, it is characterised in that：The seal section outer wall is circumferentially equipped with two sealings
Enclose locating slot, planes where two sealing ring locating slots with seal section central axis upright.
4. a kind of valve according to claim 1, it is characterised in that：The seal section bottom is set there are one can be with interior hexagonal
The interior hexagonal groove of spanner cooperation.
5. a kind of valve according to claim 1, it is characterised in that：The fixing seal seat is equipped with and is used for and diffusion valve
Upper end opening realizes the sealing ring of sealing.
6. a kind of valve according to claim 1, it is characterised in that：The rotating bar upper end is equipped with for twisting rotating bar
Spanner.
7. a kind of valve according to claim 1, it is characterised in that：It is set on the external thread section inner wall of the movable sealing plug
There is filter layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711079846.9A CN107631050B (en) | 2017-11-06 | 2017-11-06 | A kind of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711079846.9A CN107631050B (en) | 2017-11-06 | 2017-11-06 | A kind of valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107631050A CN107631050A (en) | 2018-01-26 |
| CN107631050B true CN107631050B (en) | 2018-09-14 |
Family
ID=61107219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711079846.9A Active CN107631050B (en) | 2017-11-06 | 2017-11-06 | A kind of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107631050B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869828B (en) * | 2018-09-04 | 2019-09-06 | 启东市金猴除尘成套设备有限公司 | A kind of valve |
| CN109027295B (en) * | 2018-09-10 | 2019-09-06 | 启东市鑫宇冶金设备有限公司 | A kind of PE ball valve |
| CN108869781B (en) * | 2018-09-10 | 2019-12-10 | 浙江苏明阀门有限公司 | Natural gas valve |
| CN109538843B (en) * | 2019-01-08 | 2020-12-25 | 湖北钟格塑料管有限公司 | Branching natural gas pipeline |
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|---|---|---|---|---|
| JPH11118055A (en) * | 1997-10-13 | 1999-04-30 | Kitz Corp | Method and device for making use of discharging pipe for valve |
| JP2001153249A (en) * | 1999-11-30 | 2001-06-08 | Kubota Corp | Cover flange for diffusion valve |
| CN2457412Y (en) * | 2000-12-28 | 2001-10-31 | 郑傛宰 | Ball valve with diffuse |
| CN101354097B (en) * | 2008-09-01 | 2011-03-30 | 玉环燃具实业有限公司 | Gas valve with pressure measuring device |
| CN102797865B (en) * | 2012-07-26 | 2014-04-02 | 北京京燃凌云燃气设备有限公司 | Polyethylene (PE) double-diffusing ball valve |
| CN202719177U (en) * | 2012-08-02 | 2013-02-06 | 苏州工业园区思达德阀门有限公司 | Double-blocking and double-bleeding ball valve |
| CN204878947U (en) * | 2015-04-15 | 2015-12-16 | 北京保利泰克塑料制品有限公司 | A exhaust stack valve for PE ball cock assembly |
| CN204784815U (en) * | 2015-05-26 | 2015-11-18 | 苏州市燃气设备阀门制造有限公司 | PE connects steel ball valve |
| CN105114652A (en) * | 2015-09-13 | 2015-12-02 | 苏州市燃气设备阀门制造有限公司 | Steel-plastics ball valve structure |
| CN205402082U (en) * | 2016-03-08 | 2016-07-27 | 王大功 | Natural gas line plugging device |
| CN106224686B (en) * | 2016-09-19 | 2018-07-06 | 钊田 | A kind of pipeline diffuses the on-line production more changing device and replacing options of valve |
| CN206386538U (en) * | 2017-01-16 | 2017-08-08 | 河北强星调压器有限公司 | A kind of high-voltage safety diffusion valve |
-
2017
- 2017-11-06 CN CN201711079846.9A patent/CN107631050B/en active Active
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| CN107631050A (en) | 2018-01-26 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180807 Address after: 325000 Zhejiang province Wenzhou Longwan District Yongxing Street Hong Kong Road 32 Applicant after: LIANGGANG VALVE GROUP CO., LTD. Address before: 310003 202 unit, 5 unit 8, rouge new village, Xiacheng District, Hangzhou, Zhejiang Applicant before: Zhao Guifeng |
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