CN104576235A - Automatic reclosing lock device of miniature circuit breaker - Google Patents
Automatic reclosing lock device of miniature circuit breaker Download PDFInfo
- Publication number
- CN104576235A CN104576235A CN201510038286.7A CN201510038286A CN104576235A CN 104576235 A CN104576235 A CN 104576235A CN 201510038286 A CN201510038286 A CN 201510038286A CN 104576235 A CN104576235 A CN 104576235A
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- CN
- China
- Prior art keywords
- circuit breaker
- bevel gear
- miniature circuit
- base
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 7
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
Landscapes
- Mechanisms For Operating Contacts (AREA)
- Breakers (AREA)
Abstract
The invention relates to an automatic reclosing lock device of a miniature circuit breaker. The automatic reclosing lock device of the miniature circuit breaker comprises a base, an upper cover, a transmission mechanism, a tripping mechanism and an electronic control unit, wherein the transmission mechanism comprises a reversing motor, an angle gear arranged on a rotating shaft of the reversing motor, a bevel gear meshed with the angle gear, a closing brake micro-switch and a separating brake micro-switch, wherein an universal driving shaft is arranged on the lower end face of the bevel gear, one end of the universal driving shaft penetrates through an installation hole in the base and connected to an operating handle of the miniature circuit breaker, and a manual operation switching mechanism/ an automatically switching mechanism are arranged on the base, corresponding to the bevel gear; the tripping mechanism comprises a iron core, a coil, a tripping shaft, a tripping piece and a photosensitive element, wherein one end of the tripping shaft is arranged in an arc hole, and the other end of the tripping shaft is connected to a moving contact support of the miniature circuit breaker; the electronic control unit controls the reversing motor to rotate forwards, to rotate backwards and to stop the motion, and the bevel gear is driven to achieve the automatic reclosing lock motion of the miniature circuit breaker. The automatic reclosing lock device of the miniature circuit breaker has the advantages of being simple in structure, and stable in performance.
Description
Technical field
The present invention relates to a kind of miniature circuit breaker, be specifically related to a kind of auto recloser of miniature circuit breaker.
Background technology
At present, miniature circuit breaker is mainly used in the various places such as industry, business, high level and residential houses, along with the development of China's intelligent grid, under the prerequisite requiring electric power netting safe running, more and more eager to the intellectuality realizing control apparatus.Miniature circuit breaker is extensively adopted to be without prejudice in order to protect the circuit in electric power system in existing low-voltage distribution system; when there is the faults such as phase fault, in short-term power failure; miniature circuit breaker will automatic trip; to realize protecting of task; although this technical scheme has the function to electric line and equipment protection thereof; but when needing user or staff's closing by hand power transmission after Failure elimination; this miniature circuit breaker exists can not the defect of power transmission and waste of manpower in time, thus can not adapt to the intelligentized growth requirement of electrical network.Although the existing miniature circuit breaker commercially occurred with reclosing function, but, the transmission mechanism structural design of the reclosing device of this miniature circuit breaker is more complicated, and have that production cost is high, the defect of unstable properties, when circuit break down need miniature circuit breaker fast trip time, the transmission mechanism action of this circuit breaker is insensitive, thus causes serious potential safety hazard, cannot ensure the Electrical Safety of user.
Summary of the invention
The object of the invention is to the defect overcoming prior art, provide that a kind of structure is simple, stable performance, production cost are low, effectively can realize automatic reclosing and the auto recloser of the miniature circuit breaker of the normal divide-shut brake of circuit breaker can not be affected.
For achieving the above object, the present invention adopts a kind of auto recloser of miniature circuit breaker, comprises base, upper cover, be arranged on the transmission mechanism on base, corresponding transmission mechanism side place is arranged on the tripping mechanism on base, electronic-controlled installation, described transmission mechanism comprises clockwise and anticlockwise motor, be arranged on the bevel gear in the rotating shaft of clockwise and anticlockwise motor, be meshed with bevel gear bevel gear, corresponding bevel gear one end place is arranged on the combined floodgate sensitive switch on base, the other end place of corresponding bevel gear is arranged on the separating brake sensitive switch on base, the lower surface of described bevel gear is provided with universal driving shaft, one end of this universal driving shaft is connected on the operating grip of miniature circuit breaker through the installing hole on base, on described base, corresponding bevel gear place is provided with manual/auto switching mechanism, and described tripping mechanism comprises iron core, be arranged on the coil on iron core, be arranged on the trip shaft in the arcuate socket on base, one end place of corresponding arcuate socket and iron core link the dropout part arranged, the other end place of corresponding arcuate socket is arranged on photo-sensitive cell on base, one end of described trip shaft is arranged in arcuate socket, the other end in this trip shaft is connected on the moving contact rack of miniature circuit breaker, and described electronic-controlled installation controls clockwise and anticlockwise motor and rotates forward, reversion, stop action, and drive bevel gear action to realize the automatic reclosing action of miniature circuit breaker.
The beneficial effect of said structure is: the auto recloser of this miniature circuit breaker has that structure is simple, stable performance, production cost are low, effectively can realize automatic reclosing and can not affect the advantage of the normal divide-shut brake of circuit breaker.When small size breaker is complete, moving contact and fixed contact disconnect, now, the trip shaft be connected with the moving contact rack of miniature circuit breaker is positioned at photo-sensitive cell, trip shaft triggers photo-sensitive cell, this reclosing device obtains signal, clockwise and anticlockwise motor starts to rotate forward, bevel gear driving bevel gear in the rotating shaft of clockwise and anticlockwise motor rotates clockwise, bevel gear drives universal driving shaft to rotate clockwise, universal driving shaft drives the operating grip of miniature circuit breaker to realize reclosing action, when bevel gear touches combined floodgate sensitive switch, clockwise and anticlockwise motor stops operating, namely this miniature circuit breaker reclosing is complete, when reclosing device obtains the trip signal of miniature circuit breaker, the coil electricity of tripping mechanism, thus iron core drives de-fasteners action, dropout part drives trip shaft action, when in the induction range that trip shaft moves to photo-sensitive cell, clockwise and anticlockwise motor starts, clockwise and anticlockwise motor starts to rotate backward, bevel gear driving bevel gear in the rotating shaft of clockwise and anticlockwise motor rotates counterclockwise, thus the universal driving shaft on bevel gear drives the operating grip of miniature circuit breaker to realize separating brake action, when bevel gear touches separating brake sensitive switch, clockwise and anticlockwise motor stops operating, namely this miniature circuit breaker separating brake is complete.This tripping mechanism adopts photo-sensitive cell, non-contact type Trigger Function can be realized, thus the sensitivity of the reclosing device action of this miniature circuit breaker can be ensured.
Described manual/auto switching mechanism comprises button in the chute that is arranged on base, one end place of the keeper arranged that links with button, corresponding keeper is arranged on boss, back-moving spring on base, one end of described keeper is provided with spacer on the upper surface of boss of conflicting, described keeper is provided with the location hole for being sleeved on universal driving shaft, the upper surface of described bevel gear is provided with locating shaft, one end card of described back-moving spring turns on locating shaft, and the other end of this spring is conflicted on the inwall of upper cover.Bevel gear place corresponding on base is provided with manual/auto switching mechanism, manual and auto-conversion function can be realized, when button is pushed to manual gear, button drives keeper action, when spacer on keeper rotates to the below of boss, now, bevel gear loses the restraint of keeper, back-moving spring promotes the downward action of bevel gear, bevel gear is separated with bevel gear, thus the operating grip of miniature circuit breaker loses the restraint of bevel gear, namely operating personnel can stir operating grip and realize the manual divide-shut brake of miniature circuit breaker; When button is pushed to automatic gear, spacer on keeper turns on the upper surface of boss, thus keeper promotes bevel gear upwards action, now, bevel gear is meshed with bevel gear, namely realize automatic divide-shut brake function, now the operating grip of miniature circuit breaker is restricted, and cannot carry out manual operation.
Described keeper is provided with projection near one end of button, the lower surface of described button is provided with the draw-in groove for installing described projection.By keeper and the button of this vibrational power flow, thus be convenient to the assembling of keeper and button, improve the operating efficiency of assembly crewman.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention stereogram.
Fig. 2 is embodiment of the present invention decomposing schematic representation.
Fig. 3 is embodiment of the present invention gate-dividing state structural representation.
Fig. 4 is embodiment of the present invention "on" position structural representation.
Fig. 5 is the assembling schematic diagram of embodiment of the present invention button and keeper.
Embodiment
As shown in Fig. 1,2,3,4,5, the embodiment of the present invention is a kind of auto recloser of miniature circuit breaker, comprises base 10, upper cover 11, the transmission mechanism be arranged on base 10, corresponding transmission mechanism side place are arranged on tripping mechanism, electronic-controlled installation on base 10.Described transmission mechanism comprises clockwise and anticlockwise motor 20, the bevel gear 21 be arranged in the rotating shaft 201 of clockwise and anticlockwise motor 20, the bevel gear 22 that to be meshed with bevel gear 21, corresponding bevel gear 22 one end place are arranged on combined floodgate sensitive switch 23 on base 10, the other end place of corresponding bevel gear 22 is arranged on separating brake sensitive switch 24 on base 10, the lower surface of described bevel gear 22 is provided with universal driving shaft 221, and one end of this universal driving shaft 221 is connected on the operating grip of miniature circuit breaker through the installing hole on base 10.On described base 10, corresponding bevel gear 22 place is provided with manual/auto switching mechanism.Described tripping mechanism comprises iron core 31, be arranged on the coil 30 on iron core 31, be arranged on the trip shaft 33 in the arcuate socket 101 on base 10, one end place of corresponding arcuate socket 101 and iron core 31 link the dropout part 32 arranged, the other end place of corresponding arcuate socket 101 is arranged on photo-sensitive cell 34 on base 10, one end of described trip shaft 33 is arranged in arcuate socket 101, the other end in this trip shaft 33 is connected on the moving contact rack of miniature circuit breaker, described electronic-controlled installation controls clockwise and anticlockwise motor 10 and rotates forward, reversion, stop action, and drive bevel gear 22 action to realize the automatic reclosing action of miniature circuit breaker.
The auto recloser of this miniature circuit breaker has that structure is simple, stable performance, production cost are low, effectively can realize automatic reclosing and can not affect the advantage of the normal divide-shut brake of circuit breaker.When small size breaker is complete, moving contact and fixed contact disconnect, now, the trip shaft be connected with the moving contact rack of miniature circuit breaker is positioned at photo-sensitive cell, trip shaft triggers photo-sensitive cell, this reclosing device obtains signal, clockwise and anticlockwise motor starts to rotate forward, bevel gear driving bevel gear in the rotating shaft of clockwise and anticlockwise motor rotates clockwise, bevel gear drives universal driving shaft to rotate clockwise, universal driving shaft drives the operating grip of miniature circuit breaker to realize reclosing action, when bevel gear touches combined floodgate sensitive switch, clockwise and anticlockwise motor stops operating, namely this miniature circuit breaker reclosing is complete, when reclosing device obtains the trip signal of miniature circuit breaker, the coil electricity of tripping mechanism, thus iron core drives de-fasteners action, dropout part drives trip shaft action, when in the induction range that trip shaft moves to photo-sensitive cell, clockwise and anticlockwise motor starts, clockwise and anticlockwise motor starts to rotate backward, bevel gear driving bevel gear in the rotating shaft of clockwise and anticlockwise motor rotates counterclockwise, thus the universal driving shaft on bevel gear drives the operating grip of miniature circuit breaker to realize separating brake action, when bevel gear touches separating brake sensitive switch, clockwise and anticlockwise motor stops operating, namely this miniature circuit breaker separating brake is complete.This tripping mechanism adopts photo-sensitive cell, non-contact type Trigger Function can be realized, thus the sensitivity of the reclosing device action of this miniature circuit breaker can be ensured.
Composition graphs 2 and Fig. 3, described manual/auto switching mechanism comprises the button 40 in the chute 102 that is arranged on base 10, to link the keeper 41 arranged with button 40, one end place of corresponding keeper 41 is arranged on the boss 42 on base 10, back-moving spring 43, one end of described keeper 41 is provided with spacer 412 on the upper surface of boss 42 of conflicting, described keeper 41 is provided with the location hole 411 for being sleeved on universal driving shaft 221, the upper surface of described bevel gear 22 is provided with locating shaft 222, one end card of described back-moving spring 43 turns on locating shaft 222, the other end of this spring 43 is conflicted on the inwall of upper cover 11.As shown in Figure 5, described keeper 41 is provided with projection 413 near one end of button 40, the lower surface of described button 40 is provided with the draw-in groove 401 for installing described projection 413.By keeper and the button of this vibrational power flow, thus be convenient to the assembling of keeper and button, improve the operating efficiency of staff.Bevel gear place corresponding on base is provided with manual/auto switching mechanism, manual and auto-conversion function can be realized, when button is pushed to manual gear, button drives keeper action, when spacer on keeper rotates to the below of boss, now, bevel gear loses the restraint of keeper, back-moving spring promotes the downward action of bevel gear, bevel gear is separated with bevel gear, thus the operating grip of miniature circuit breaker loses the restraint of bevel gear, namely operating personnel can stir operating grip and realize the manual divide-shut brake of miniature circuit breaker; When button is pushed to automatic gear, spacer on keeper turns on the upper surface of boss, thus keeper promotes bevel gear upwards action, now, bevel gear is meshed with bevel gear, namely realize automatic divide-shut brake function, now the operating grip of miniature circuit breaker is restricted, and cannot carry out manual operation.
Claims (3)
1. an auto recloser for miniature circuit breaker, comprises base, upper cover, be arranged on the transmission mechanism on base, corresponding transmission mechanism side place is arranged on the tripping mechanism on base, electronic-controlled installation, is characterized in that: described transmission mechanism comprises clockwise and anticlockwise motor, be arranged on the bevel gear in the rotating shaft of clockwise and anticlockwise motor, be meshed with bevel gear bevel gear, corresponding bevel gear one end place is arranged on the combined floodgate sensitive switch on base, the other end place of corresponding bevel gear is arranged on the separating brake sensitive switch on base, the lower surface of described bevel gear is provided with universal driving shaft, one end of this universal driving shaft is connected on the operating grip of miniature circuit breaker through the installing hole on base, on described base, corresponding bevel gear place is provided with manual/auto switching mechanism, and described tripping mechanism comprises iron core, be arranged on the coil on iron core, be arranged on the trip shaft in the arcuate socket on base, one end place of corresponding arcuate socket and iron core link the dropout part arranged, the other end place of corresponding arcuate socket is arranged on photo-sensitive cell on base, one end of described trip shaft is arranged in arcuate socket, the other end in this trip shaft is connected on the moving contact rack of miniature circuit breaker, and described electronic-controlled installation controls clockwise and anticlockwise motor and rotates forward, reversion, stop action, and drive bevel gear action to realize the automatic reclosing action of miniature circuit breaker.
2. the auto recloser of miniature circuit breaker according to claim 1, it is characterized in that: described manual/auto switching mechanism comprises the button in the chute that is arranged on base, to link the keeper arranged with button, one end place of corresponding keeper is arranged on the boss on base, back-moving spring, one end of described keeper is provided with spacer on the upper surface of boss of conflicting, described keeper is provided with the location hole for being sleeved on universal driving shaft, the upper surface of described bevel gear is provided with locating shaft, one end card of described back-moving spring turns on locating shaft, the other end of this spring is conflicted on the inwall of upper cover.
3. the auto recloser of miniature circuit breaker according to claim 1 and 2, is characterized in that: described keeper is provided with projection near one end of button, the lower surface of described button is provided with the draw-in groove for installing described projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038286.7A CN104576235B (en) | 2015-01-23 | 2015-01-23 | Automatic reclosing lock device of miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038286.7A CN104576235B (en) | 2015-01-23 | 2015-01-23 | Automatic reclosing lock device of miniature circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104576235A true CN104576235A (en) | 2015-04-29 |
| CN104576235B CN104576235B (en) | 2017-02-22 |
Family
ID=53092041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510038286.7A Active CN104576235B (en) | 2015-01-23 | 2015-01-23 | Automatic reclosing lock device of miniature circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN104576235B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795286A (en) * | 2015-04-30 | 2015-07-22 | 浙江天正电气股份有限公司 | Circuit breaker |
| CN104795287A (en) * | 2015-04-30 | 2015-07-22 | 浙江天正电气股份有限公司 | Breaker with elastic energy-storing module |
| CN105070608A (en) * | 2015-08-12 | 2015-11-18 | 宏秀电气有限公司 | Working method of automatic switching-off/switching-on small circuit breaker |
| CN106057600A (en) * | 2016-08-05 | 2016-10-26 | 上海永继电气股份有限公司 | Reclosing apparatus of circuit breaker |
| CN106653502A (en) * | 2016-12-30 | 2017-05-10 | 浙江天正电气股份有限公司 | Power-driven operating device capable of remotely controlling breaking and closing of small-sized circuit breaker |
| CN107845513A (en) * | 2017-12-07 | 2018-03-27 | 西门子中压开关技术（无锡）有限公司 | Motor-operating mechanism and switching device |
| CN108155069A (en) * | 2018-02-09 | 2018-06-12 | 浙江德菱科技股份有限公司 | Reclosing miniature circuit breaker |
| CN109346387A (en) * | 2018-09-25 | 2019-02-15 | 浙江正泰电器股份有限公司 | A kind of energy storage type reclosing breaker and its control circuit and control method |
| CN111180273A (en) * | 2020-01-20 | 2020-05-19 | 厦门大恒科技有限公司 | Internet of things miniature circuit breaker with reclosing function |
| WO2021096002A1 (en) * | 2019-11-13 | 2021-05-20 | 엘에스일렉트릭(주) | Circuit breaker |
| CN113451083A (en) * | 2021-06-28 | 2021-09-28 | 温州商学院 | Intelligent automatic reclosing device of molded case circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5838219A (en) * | 1997-05-29 | 1998-11-17 | Eaton Corporation | Electrical circuit breaker with manual and remote actuators |
| CN102800538A (en) * | 2012-08-07 | 2012-11-28 | 浙江麦克力电气有限公司 | Automatic switching-on device of circuit breaker |
| CN103887123A (en) * | 2014-03-11 | 2014-06-25 | 温州圣普电气有限公司 | Intelligent switch-on and switch-off device of miniature circuit breaker |
-
2015
- 2015-01-23 CN CN201510038286.7A patent/CN104576235B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5838219A (en) * | 1997-05-29 | 1998-11-17 | Eaton Corporation | Electrical circuit breaker with manual and remote actuators |
| CN102800538A (en) * | 2012-08-07 | 2012-11-28 | 浙江麦克力电气有限公司 | Automatic switching-on device of circuit breaker |
| CN103887123A (en) * | 2014-03-11 | 2014-06-25 | 温州圣普电气有限公司 | Intelligent switch-on and switch-off device of miniature circuit breaker |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795286A (en) * | 2015-04-30 | 2015-07-22 | 浙江天正电气股份有限公司 | Circuit breaker |
| CN104795287A (en) * | 2015-04-30 | 2015-07-22 | 浙江天正电气股份有限公司 | Breaker with elastic energy-storing module |
| CN105070608A (en) * | 2015-08-12 | 2015-11-18 | 宏秀电气有限公司 | Working method of automatic switching-off/switching-on small circuit breaker |
| CN106057600A (en) * | 2016-08-05 | 2016-10-26 | 上海永继电气股份有限公司 | Reclosing apparatus of circuit breaker |
| CN106057600B (en) * | 2016-08-05 | 2023-09-19 | 上海永继电气股份有限公司 | Circuit breaker reclosing device |
| CN106653502B (en) * | 2016-12-30 | 2019-02-22 | 浙江天正电气股份有限公司 | A kind of electrically operated device of remote controlled miniature circuit breaker on/off switch |
| CN106653502A (en) * | 2016-12-30 | 2017-05-10 | 浙江天正电气股份有限公司 | Power-driven operating device capable of remotely controlling breaking and closing of small-sized circuit breaker |
| CN107845513A (en) * | 2017-12-07 | 2018-03-27 | 西门子中压开关技术（无锡）有限公司 | Motor-operating mechanism and switching device |
| CN107845513B (en) * | 2017-12-07 | 2020-01-31 | 西门子中压开关技术（无锡）有限公司 | Electric operating mechanism and switch device |
| CN108155069A (en) * | 2018-02-09 | 2018-06-12 | 浙江德菱科技股份有限公司 | Reclosing miniature circuit breaker |
| CN108155069B (en) * | 2018-02-09 | 2023-11-17 | 浙江德菱科技股份有限公司 | Reclosing miniature circuit breaker |
| CN109346387A (en) * | 2018-09-25 | 2019-02-15 | 浙江正泰电器股份有限公司 | A kind of energy storage type reclosing breaker and its control circuit and control method |
| WO2021096002A1 (en) * | 2019-11-13 | 2021-05-20 | 엘에스일렉트릭(주) | Circuit breaker |
| US12087534B2 (en) | 2019-11-13 | 2024-09-10 | Ls Electric Co., Ltd. | Circuit breaker with manual energy-accumulating unit gears intitally separated from one another |
| CN111180273A (en) * | 2020-01-20 | 2020-05-19 | 厦门大恒科技有限公司 | Internet of things miniature circuit breaker with reclosing function |
| CN113451083A (en) * | 2021-06-28 | 2021-09-28 | 温州商学院 | Intelligent automatic reclosing device of molded case circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104576235B (en) | 2017-02-22 |
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Address after: 325600 Wenzhou Daqiao Industrial Park, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: Huanyu Hi Tech Co.,Ltd. Address before: 325600 Wenzhou Daqiao Industrial Zone, Yueqing City, Zhejiang Province Patentee before: Huanyu Hi Tech Co.,Ltd. |