CN106762959B - Flow direction conversion equipment - Google Patents
Flow direction conversion equipment Download PDFInfo
- Publication number
- CN106762959B CN106762959B CN201710076622.6A CN201710076622A CN106762959B CN 106762959 B CN106762959 B CN 106762959B CN 201710076622 A CN201710076622 A CN 201710076622A CN 106762959 B CN106762959 B CN 106762959B
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- Prior art keywords
- fluid
- connecting hole
- conversion
- connecting tube
- flow direction
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention provides a kind of flow direction conversion equipment, which includes body and conversion control.Body includes conversion cradle, has fluid inlet orifice, Fluid-exiting apertures, the first connecting hole and the second connecting hole on conversion cradle, the first connecting hole and the second connecting hole are connected with outer closures device.Conversion control is connected with conversion cradle, and changing on control has the first connecting tube, the second connecting tube and the 3rd connecting tube.It is operated in by varying the link position of three connecting tubes to change control on different stations, in second station, fluid is flowed into through the second connecting hole, the outflow of the first connecting hole, realizes the fluid circulation of first direction；And in 3rd station, fluid is flowed into through the first connecting hole, the outflow of the second connecting hole, realizes the fluid circulation of second direction.
Description
Technical field
The present invention relates to hydraulic machinery field, and more particularly to a kind of flow direction conversion equipment.
Background technology
Fluid conversion equipment is a kind of component that can change flow direction.To realize the reciprocating motion of piston in hydraulic cylinder,
It is generally necessary to the fluid conversion equipment that can change oil circuit direction is set in hydraulic cylinder.The structure of existing hydraulic cylinder usually has two
Kind, Yi Zhongshi：Oil circuit can only be circulated in one direction after entering hydraulic cylinder in hydraulic cylinder, i.e., can only drive piston forward
Movement, the retrogressing of piston could realize after then needing manual draining, and user uses very inconvenient, and operating efficiency is very low.
Another method is：To realize that the automatic of piston is retracted, oil circuit conversion can be configured in hydraulic cylinder on the market at present
Valve, so as to become bidirectional hydraulic.However, in the hydraulic cylinder of this structure, complicated and oil circuit the distribution of oil circuit switching valve
Also very complicated, the sealing between this not only of high cost and oil circuit also has larger hidden danger.
The content of the invention
The present invention is in order to overcome the deficiencies of the prior art and provide a kind of fluid side of the fluid circulation of achievable both direction
To conversion equipment.
To achieve these goals, the present invention provides a kind of flow direction conversion equipment, which includes body and conversion
Control.Body includes conversion cradle, has fluid inlet orifice, Fluid-exiting apertures, the first connecting hole and the second connecting hole on conversion cradle,
First connecting hole and the second connecting hole are connected with outer closures device.Conversion control is connected with conversion cradle, changes control
It is upper that there is the first connecting tube, the second connecting tube and the 3rd connecting tube.
On the first station, the both ends of the second connecting tube are connected with fluid inlet orifice and Fluid-exiting apertures, and fluid connects through second
Adapter circulates between fluid inlet orifice and Fluid-exiting apertures, and fluid is introduced into outer closures device；
In second station, the both ends of the first connecting tube are connected with the first connecting hole and Fluid-exiting apertures respectively, and the 3rd connects
The both ends of adapter are connected with the second connecting hole and fluid inlet orifice respectively, and fluid flows into outer through the 3rd connecting tube from the second connecting hole
The first cavity in portion's closure means, the fluid in the second cavity of outer closures device is through the first connecting hole, the first connecting tube
Flowed out from Fluid-exiting apertures, form the fluid circulation in first direction；
In 3rd station, the both ends of the first connecting tube are connected with the first connecting hole and fluid inlet orifice respectively, and the 3rd connects
The both ends of adapter are connected with the second connecting hole and Fluid-exiting apertures respectively, and fluid flows into outer through the first connecting tube from the first connecting hole
The second cavity in portion's closure means, the fluid in the first cavity of outer closures device is through the second connecting hole, the 3rd connecting tube
Flowed out from Fluid-exiting apertures, form the fluid circulation in second direction.
In one embodiment of the invention, fluid inlet orifice and Fluid-exiting apertures are oppositely arranged, the first connecting hole and the second connecting hole
It is oppositely arranged, line and the first connecting hole center and the second connecting hole center between fluid inlet orifice center and Fluid-exiting apertures center
Between line it is perpendicular.
In one embodiment of the invention, the first connecting tube, the second connecting tube and the 3rd connecting tube are arranged in arc-shaped to be turned
Change on control.
In one embodiment of the invention, conversion control and conversion cradle are rotatablely connected, by rotate conversion control come
Flow direction conversion equipment switches between the first station, second station and 3rd station.
In one embodiment of the invention, changing has the spacing of limitation conversion control rotational angle on control and conversion cradle
Portion, limiting section include three arc grooves being arranged on conversion cradle and are arranged on recessed with three arcs on conversion control
The matched lug boss of groove, three arc grooves are correspondingly arranged with fluid inlet orifice, the first connecting hole and the second connecting hole respectively.
In one embodiment of the invention, conversion cradle and body detachable connection.
In one embodiment of the invention, one end of body has the connecting portion being connected with outer eccentric drive component, even
There is multiple circumferentially disposed piston components along eccentric shaft in socket part, there are multiple connection conversion cradles on each piston component
Through hole.
In one embodiment of the invention, each piston component includes spring base, spring, piston and oil switch living.Spring
It is fixed on spring base.Piston is connected with spring, has the through hole of multiple connection conversion cradles on piston.Oil switch sleeve living is arranged on
Spring and positioned at piston close to the side of spring base.
In one embodiment of the invention, flow direction conversion equipment further include be arranged on it is intrinsic and with fluid inlet orifice and
At least one fluid storage tank that Fluid-exiting apertures are connected.
In conclusion flow direction conversion equipment provided by the invention on body by setting fluid inlet orifice, fluid to go out
Hole, the first connecting hole and the second connecting hole are simultaneously set and fluid inlet orifice, Fluid-exiting apertures, the first connecting hole and the on conversion control
Three connecting tubes that two connecting holes are connected.It is operated in not by varying the link position of three connecting tubes to change control
On same station, in second station, fluid is flowed into through the second connecting hole, the outflow of the first connecting hole, realizes the stream of first direction
Body circulation；And in 3rd station, fluid is flowed into through the first connecting hole, the outflow of the second connecting hole, realizes the fluid of second direction
Circulation.
In addition, being additionally provided with the connecting portion being connected with outer eccentric driving device on body, therefore can directly be installed at
Realize that the automatic of piston in hydraulic cylinder moves forward and backward on traditional hydraulic pump.It is not only greatly convenient for users to use, at the same time
Also significantly reduce cost.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly,
And coordinate attached drawing, it is described in detail below.
Brief description of the drawings
Fig. 1 a show the structure diagram of body in fluid conversion equipment provided by the invention.
Fig. 1 b show in Fig. 1 a the structure diagram at another visual angle of body in fluid conversion equipment.
Fig. 2 show the structure diagram that control is changed in fluid conversion equipment provided by the invention.
Fig. 3 show the assembling schematic diagram of conversion cradle and conversion control when fluid conversion equipment is located at the first station.
The fluid that Fig. 4 show when fluid conversion equipment is located at the first station flows to schematic diagram.
Fig. 5 show the assembling schematic diagram of conversion cradle and conversion control when fluid conversion equipment is located at second station.
The fluid that Fig. 6 show when fluid conversion equipment is located at second station flows to schematic diagram.
Fig. 7 show the assembling schematic diagram of conversion cradle and conversion control when fluid conversion equipment is located at 3rd station.
The fluid that Fig. 8 show when fluid conversion equipment is located at 3rd station flows to schematic diagram.
Fig. 9 show the structure diagram of piston component in fluid conversion equipment.
Embodiment
As shown in Figure 1 to Figure 3, in this present embodiment, flow direction conversion equipment includes body 100 and conversion control 200.
Body 100 includes conversion cradle 1, has fluid inlet orifice 11, Fluid-exiting apertures 12, the first connecting hole 13 and second on conversion cradle 1
Connecting hole 14, the first connecting hole 13 and the second connecting hole 14 are connected with outer closures device 300.Change control 200 and conversion
Base 1 is connected, and changing on control 200 has the first connecting tube 201, the second connecting tube 202 and the 3rd connecting tube 203.
In this present embodiment, the flow direction conversion equipment is used for hydraulic pump, and the outer closures device 300 is oil
Chamber.However, the present invention is not limited in any way this.In other embodiments, flow direction conversion equipment provided by the invention is same
Change in the direction that sample is suitable for current.
Fig. 3 and Fig. 4 sets forth when flow direction conversion equipment provided in this embodiment is located at the first station and change bottom
The assembling schematic diagram and fluid of seat and conversion control flow to schematic diagram.On the first station, the both ends of the second connecting tube 202
E and E1 is connected with fluid inlet orifice 11 and Fluid-exiting apertures 12, and fluid is through the second connecting tube 202 in fluid inlet orifice 11 and Fluid-exiting apertures
Circulated between 12, fluid is introduced into oil pocket.Under the station, since fluid (being in this present embodiment hydraulic oil) is introduced into oil
Chamber, the power set 400 being connected in oil pocket (push rod or piston rod) will not work.
Fig. 5 and Fig. 6 sets forth when flow direction conversion equipment provided in this embodiment is located at second station and change bottom
The assembling schematic diagram and fluid of seat and conversion control flow to schematic diagram.At this time, as shown in figure 5, the two of the first connecting tube 201
End D and D1 is connected with the first connecting hole 13 and Fluid-exiting apertures 12 respectively, and the both ends F1 and F of the 3rd connecting tube 203 are respectively with the
Two connecting holes 14 are connected with fluid inlet orifice 11, and fluid flows into the of oil pocket 300 through the 3rd connecting tube 203 from the second connecting hole 14
In one cavity 301, oily power set 400 are promoted to travel forward, the fluid in the second cavity 302 is through the second connecting hole the 14, the 3rd
Connecting tube 203 is flowed out from Fluid-exiting apertures 12, forms the fluid circulation in first direction.
Fig. 7 and Fig. 8 sets forth when flow direction conversion equipment provided in this embodiment is located at 3rd station and change bottom
The assembling schematic diagram and fluid of seat and conversion control flow to schematic diagram.At this time, the both ends D1 and D of the first connecting tube 201 points
Be not connected with the first connecting hole 13 and fluid inlet orifice 11, the both ends F and F1 of the 3rd connecting tube 203 respectively with the second connecting hole 14
It is connected with Fluid-exiting apertures 12, fluid flows into the second cavity 302 through the first connecting tube 201 from the first connecting hole 13, and power is filled
Put 400 and push back to initial position, the hydraulic oil in the first cavity 301 is through the second connecting hole 14 and the 3rd connecting tube 203 from fluid
Portal 12 outflows, form the fluid circulation in second direction.The alternation of second station and 3rd station causes power set
Reciprocating motion can be realized automatically, compared to traditional oil circuit switching valve, flow direction conversion device structure provided by the invention is simple,
It enormously simplify the distribution of oil circuit.
In this present embodiment, fluid inlet orifice 11 and Fluid-exiting apertures 12 are oppositely arranged, the first connecting hole 13 and the second connecting hole
14 are oppositely arranged, the center of line and the first connecting hole 13 between the center of fluid inlet orifice 11 and the center of Fluid-exiting apertures 12 and
Line between the center of second connecting hole 14 is perpendicular, and the first connecting hole 13 is arrived between fluid inlet orifice 11 and Fluid-exiting apertures 12
Distance it is equal, the second connecting hole 14 to the distance between fluid inlet orifice 11 and Fluid-exiting apertures 12 it is equal.It is corresponding, such as Fig. 2
It is shown, change on control 200, the first connecting tube 201 is identical with 203 structure of the 3rd connecting tube and is symmetricly set on the second connecting tube
202 both sides.The setting causes, when change control 200 by the first station and can be realized when both sides rotate to the left and right the first station and
The switching of second station.However, the present invention is not limited in any way this.
In this present embodiment, change and be rotatablely connected between control 200 and conversion cradle 1, to realize between different station
Switching, it is preferred that set the first connecting tube 201, the second connecting tube 202 and the 3rd connecting tube 203 to be arranged on conversion in arc-shaped
On control 200.The setting causes user to make using the first connecting tube 201, the second connecting tube 202 and the 3rd connecting tube 203
The rotation of conversion control 200 is realized for swing handle.However, the present invention is not limited in any way this.
To realize the accurate switching between the first station, second station and 3rd station, in other the present embodiment, can set
Putting has the limiting section of limitation conversion control rotational angle on conversion control 200 and conversion cradle 1, limiting section, which includes being arranged on, to be turned
Refoot three on seat arc grooves and be arranged on conversion control on three matched lug bosses of arc groove, three
Arc groove is correspondingly arranged with fluid inlet orifice, the first connecting hole and the second connecting hole respectively.However, the present invention this is not made it is any
Limit., can be in the position corresponding to conversion cradle upper fluid into hole, the first connecting hole and the second connecting hole in other embodiments
Three station location markers of upper setting, corresponding change is also equipped with rotating mark on control, by rotating mark and corresponding position
Characterization conversion control rotate in place when mark is to corresponding to.
In this present embodiment, it is detachable connection between conversion cradle 1 and body 100, which greatly facilitates
The replacement and maintenance of conversion cradle 1.
Flow direction conversion equipment provided in this embodiment is applied on hydraulic tool, therefore, in this present embodiment such as Fig. 1
One end of shown body has the connecting portion 2 being connected with outer eccentric drive component, has on connecting portion 2 multiple along eccentric shaft
Circumferentially disposed piston component 21, there are the through holes of multiple connection conversion cradles (due to angle on each piston component 21
Problem, not shown).
As shown in figure 9, each piston component 21 includes spring base 211, spring 212, piston 213 and oil switch 214 living.
Spring 212 is fixed on spring base 211.Piston 213 is connected with spring 212, has multiple connection conversion cradles on piston 213
Through hole.Oil switch 214 living is sheathed on spring 212 and positioned at piston 213 close to the side of spring base 211.Specific operation principle
For：Outer eccentric drive component extruded in rotation process it is multiple along its circumferentially disposed piston component 21, in piston component 21
Piston 313 on there are the through holes of multiple connection conversion cradles, piston 213 is in eccentric drive component 400,214 and of oil switch living
Move back and forth under the action of spring 212, squeeze the oily via through holes in fuel tank, conversion control and conversion cradle during movement
It is pressed into oil pocket.Pressure increase in oil pocket, promotes propulsion power device 400 to move.In second station, propulsion power dress
Put 400 to travel forward, in 3rd station, propulsion power device 400 moves backward, recovers to initial position.
For with enough oil reserves, in this present embodiment, flow direction conversion equipment further include be arranged on it is intrinsic
And be connected with fluid inlet orifice and Fluid-exiting apertures to two fluid storage tanks 3.However, number of the present invention to fluid storage tank 3
Amount is not limited in any way.
In conclusion flow direction conversion equipment provided by the invention on body by setting fluid inlet orifice, fluid to go out
Hole, the first connecting hole and the second connecting hole are simultaneously set and fluid inlet orifice, Fluid-exiting apertures, the first connecting hole and the on conversion control
Three connecting tubes that two connecting holes are connected.It is operated in not by varying the link position of three connecting tubes to change control
On same station, in second station, fluid is flowed into through the second connecting hole, the outflow of the first connecting hole, realizes the stream of first direction
Body circulation；And in 3rd station, fluid is flowed into through the first connecting hole, the outflow of the second connecting hole, realizes the fluid of second direction
Circulation.
In addition, being additionally provided with the connecting portion being connected with outer eccentric driving device on body, therefore can directly be installed at
Realize that the automatic of piston in hydraulic cylinder moves forward and backward on traditional hydraulic pump.It is not only greatly convenient for users to use, at the same time
Also significantly reduce cost.
Although the present invention is disclosed above by preferred embodiment, but is not limited to the present invention, this any known skill
Skill person, without departing from the spirit and scope of the present invention, can make a little change and retouch, therefore protection scope of the present invention is worked as
Subject to claims scope claimed.
Claims (8)
- A kind of 1. flow direction conversion equipment, it is characterised in that including：Body, including conversion cradle, there is on the conversion cradle fluid inlet orifice, Fluid-exiting apertures, the first connecting hole and second to connect Hole is connect, first connecting hole and the second connecting hole are connected with outer closures device；Control is changed, is connected with the conversion cradle, there is the first connecting tube, the second connecting tube and the on the conversion control Three connecting tubes；On the first station, the both ends of the second connecting tube are connected with fluid inlet orifice and Fluid-exiting apertures, and fluid is through the second connecting tube Circulated between fluid inlet orifice and Fluid-exiting apertures, fluid is introduced into outer closures device；In second station, the both ends of the first connecting tube are connected with the first connecting hole and Fluid-exiting apertures respectively, the 3rd connecting tube Both ends be connected respectively with the second connecting hole and fluid inlet orifice, fluid flows into exterior envelope through the 3rd connecting tube from the second connecting hole Close the first cavity in device, the fluid in the second cavity of outer closures device is through the first connecting hole, the first connecting tube from stream Body portals outflow, forms the fluid circulation in first direction；In 3rd station, the both ends of the first connecting tube are connected with the first connecting hole and fluid inlet orifice respectively, the 3rd connecting tube Both ends be connected respectively with the second connecting hole and Fluid-exiting apertures, fluid flows into exterior envelope through the first connecting tube from the first connecting hole Close the second cavity in device, the fluid in the first cavity of outer closures device is through the second connecting hole, the 3rd connecting tube from stream Body portals outflow, forms the fluid circulation in second direction；Fluid inlet orifice and Fluid-exiting apertures are oppositely arranged, and the first connecting hole and the second connecting hole are oppositely arranged, fluid inlet orifice center and The line between line and the first connecting hole center and the second connecting hole center between Fluid-exiting apertures center is perpendicular.
- 2. flow direction conversion equipment according to claim 1, it is characterised in that first connecting tube, the second connection Pipe and the 3rd connecting tube are arranged on conversion control in arc-shaped.
- 3. flow direction conversion equipment according to claim 1, it is characterised in that conversion control is rotated with conversion cradle to be connected Connect, cut by rotating conversion control come flow direction conversion equipment between the first station, second station and 3rd station Change.
- 4. flow direction conversion equipment according to claim 3, it is characterised in that on the conversion control and conversion cradle Limiting section with limitation conversion control rotational angle, the limiting section include three arc grooves being arranged on conversion cradle And be arranged on conversion control on the matched lug boss of three arc grooves, three arc grooves respectively with Fluid inlet orifice, the first connecting hole and the second connecting hole are correspondingly arranged.
- 5. flow direction conversion equipment according to claim 1, it is characterised in that the conversion cradle and body are detachable Formula connects.
- 6. flow direction conversion equipment according to claim 1, it is characterised in that one end of the body has and outside The connecting portion that eccentric drive component is connected, has multiple circumferentially disposed piston components along eccentric shaft on the connecting portion, There is the through hole of multiple connection conversion cradles on each piston component.
- 7. flow direction conversion equipment according to claim 6, it is characterised in that each piston component includes：Spring base；Spring, is fixed on the spring base；Piston, is connected with the spring, has multiple through holes being connected with conversion cradle on the piston；Oil switch living, is sheathed on the spring and positioned at the piston close to the side of spring base.
- 8. flow direction conversion equipment according to claim 1, it is characterised in that the flow direction conversion equipment also wraps Include and be arranged at least one fluid storage tank that is intrinsic and being connected with fluid inlet orifice and Fluid-exiting apertures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076622.6A CN106762959B (en) | 2017-02-13 | 2017-02-13 | Flow direction conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076622.6A CN106762959B (en) | 2017-02-13 | 2017-02-13 | Flow direction conversion equipment |
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| Publication Number | Publication Date |
|---|---|
| CN106762959A CN106762959A (en) | 2017-05-31 |
| CN106762959B true CN106762959B (en) | 2018-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710076622.6A Active CN106762959B (en) | 2017-02-13 | 2017-02-13 | Flow direction conversion equipment |
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| CN (1) | CN106762959B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135170A (en) * | 1955-12-13 | 1964-06-02 | Starrfraesmaschinen Ag | Hydraulic control for moving elements of a machine tool |
| CN103062430A (en) * | 2013-01-15 | 2013-04-24 | 东莞市骏兴机械科技有限公司 | Rotary fluid control valve |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN105692791A (en) * | 2016-02-02 | 2016-06-22 | 北京工业大学 | Pressure energy recovery method based on rotary liquid switcher |
| CN105712438A (en) * | 2016-02-02 | 2016-06-29 | 北京工业大学 | Pressure energy recovering method based on rotary self-sealing liquid switchers |
| CN106321544A (en) * | 2016-11-03 | 2017-01-11 | 杭州欧盾机电有限公司 | Conversion valve |
| CN206478058U (en) * | 2017-02-13 | 2017-09-08 | 杭州欧盾机电有限公司 | Flow direction conversion equipment |
-
2017
- 2017-02-13 CN CN201710076622.6A patent/CN106762959B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135170A (en) * | 1955-12-13 | 1964-06-02 | Starrfraesmaschinen Ag | Hydraulic control for moving elements of a machine tool |
| CN103062430A (en) * | 2013-01-15 | 2013-04-24 | 东莞市骏兴机械科技有限公司 | Rotary fluid control valve |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN105692791A (en) * | 2016-02-02 | 2016-06-22 | 北京工业大学 | Pressure energy recovery method based on rotary liquid switcher |
| CN105712438A (en) * | 2016-02-02 | 2016-06-29 | 北京工业大学 | Pressure energy recovering method based on rotary self-sealing liquid switchers |
| CN106321544A (en) * | 2016-11-03 | 2017-01-11 | 杭州欧盾机电有限公司 | Conversion valve |
| CN206478058U (en) * | 2017-02-13 | 2017-09-08 | 杭州欧盾机电有限公司 | Flow direction conversion equipment |
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| Publication number | Publication date |
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| CN106762959A (en) | 2017-05-31 |
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Address after: 310000 E 157, 2 floor, 688 Binan Road, Changhe street, Binjiang District, Hangzhou, Zhejiang. Patentee after: Europe Shield Technology Co., Ltd. Address before: 310000 E 157, 2 floor, 688 Binan Road, Changhe street, Binjiang District, Hangzhou, Zhejiang. Patentee before: Hangzhou Oudun Electromechanical Co., Ltd. |