CN214674367U - Distribution network transformer electric energy quality comprehensive compensation device convenient to install - Google Patents
Distribution network transformer electric energy quality comprehensive compensation device convenient to install Download PDFInfo
- Publication number
- CN214674367U CN214674367U CN202120950047.XU CN202120950047U CN214674367U CN 214674367 U CN214674367 U CN 214674367U CN 202120950047 U CN202120950047 U CN 202120950047U CN 214674367 U CN214674367 U CN 214674367U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- electric energy
- compensation device
- groove
- energy quality
- 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.)
- Active
Links
- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Patch Boards (AREA)
Abstract
The utility model discloses a distribution network transformer electric energy quality comprehensive compensation device convenient to install, which comprises an electric energy quality comprehensive compensation device and a mounting plate, wherein the mounting plate is internally provided with a mounting groove, the inner walls of the two sides of the mounting groove are respectively provided with a clamping groove, one side of the clamping groove, which is far away from the mounting groove, is movably connected with a movable rod, one opposite side of the two movable rods is respectively and fixedly connected with a baffle plate, the opposite side of the two movable rods is respectively and fixedly connected with a pressing plate, the two sides of the electric energy quality comprehensive compensation device are respectively and fixedly connected with a fixed plate, one opposite side of the two fixed plates is respectively provided with a groove, the inner wall of the groove is fixedly connected with a reset spring, the device can rapidly realize the installation and the disassembly of the electric energy quality comprehensive compensation device, thereby greatly reducing the installation and the disassembly time of installation personnel and maintenance personnel, therefore, the device has extremely strong practicability and is worth of being widely popularized.
Description
Technical Field
The utility model relates to an electric power engineering technical field specifically is a distribution network transformer electric energy quality synthesizes compensation arrangement convenient to installation.
Background
The quality of the electric energy refers to the quality of the electric energy in the electric power system. The ideal power should be a perfectly symmetric sine wave. Some factors may cause the waveform to deviate from a symmetrical sine, thereby creating power quality problems. On one hand, the problem of power quality caused by influence factors is researched, on the other hand, the problem of the influence factors is researched, and finally, how to eliminate the influence factors is researched, so that the power is close to a sine wave to the maximum extent, measures for improving the power quality are wide in design, mainly comprise the aspects of reactive compensation, harmonic suppression, voltage fluctuation and flicker reduction, three-phase imbalance solving and the like, and devices for reactive compensation and harmonic governance are as follows: the passive power filter has the functions of reactive compensation and voltage regulation, and is generally specially designed according to the parameters of a harmonic source, the electrical characteristics of a mounting point and the requirements of users; a Static Var Compensator (SVC) device is an important device for comprehensively governing voltage fluctuation, flicker, harmonic waves and voltage unbalance. Active Power Filter (APF), APF is a novel dynamic harmonic suppression and reactive power compensation power electronic device, it can all compensate harmonic and reactive current that change to frequency and amplitude, mainly be applied to low voltage distribution system, but current distribution network transformer electric energy quality comprehensive compensation device is very troublesome when the installation, thereby brought very big inconvenience for the installer, and also be convenient for dismantle, make the maintenance also become very complicated, thereby distribution network transformer electric energy quality comprehensive compensation device's practicality has seriously been influenced, for this reason, we provide a distribution network transformer electric energy quality comprehensive compensation device convenient to install.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a distribution network transformer electric energy quality synthesizes compensation arrangement convenient to installation to solve the problem that proposes in the above-mentioned background art.
In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a compensation arrangement is synthesized to distribution network transformer electric energy quality convenient to installation, synthesizes compensation arrangement and mounting panel including electric energy quality, the mounting groove has been seted up to the inside of mounting panel, the draw-in groove has all been seted up to the both sides inner wall of mounting groove, two the equal swing joint in one side that the mounting groove was kept away from to the draw-in groove has a movable rod, two the equal fixedly connected with baffle in relative one side of movable rod, two the equal fixedly connected with in back of the body one side of the back of the body of movable rod presses the clamp plate, the equal fixedly connected with fixed plate in both sides of compensation arrangement is synthesized to electric energy quality, two the one side that the fixed plate was carried on the back mutually all is seted up flutedly, the inner wall fixedly connected with reset spring of recess, reset spring's opposite side fixedly connected with cardboard, compensation arrangement's bottom fixedly connected with base is synthesized to electric energy quality.
Preferably, the mounting plate is internally provided with a holding tank below the mounting groove, the bottom of the inner cavity of the holding tank is fixedly connected with a motor, the output end of the motor is fixedly connected with a positive and negative lead screw, the outer surface of the positive and negative lead screw is movably connected with a movable block, the top of the movable block is fixedly connected with a connecting rod, the top of the connecting rod extends to the inside of the mounting groove through a chute and is fixedly connected with a limiting rod, the inside of the base is provided with a limiting groove, the motor is started through a controller to drive the positive and negative lead screw to rotate, so that the positive and negative lead screw can drive the movable blocks at the positive and negative ends to move in opposite directions or opposite directions, the movable block can drive the limiting rod to move left and right through the connecting rod, and therefore, when the mounting plate needs to be fixedly mounted, the limiting rod can be rapidly moved to the limiting groove inside the base, and when needs are dismantled, can push out the gag lever post from the spacing inslot portion equally fast, and then further improvement the stability when compensation arrangement is synthesized to electric energy quality to overall operation is simple, very is convenient for the dismantlement and the installation of compensation arrangement is synthesized to electric energy quality.
Preferably, the front end surface of the mounting plate is fixedly connected with a controller, and the outer surface of the controller is fixedly connected with a rotary switch, so that an operator can conveniently turn on and turn off the motor.
Preferably, a display panel is installed on one side of the comprehensive compensation device for power quality, and a display screen is arranged inside the display panel, so that a worker can quickly know the compensation amount required inside the comprehensive compensation device for power quality through the display screen.
Preferably, the movable block is provided with two altogether, and is located the positive and negative both ends of positive and negative lead screw respectively, through the synergism of two movable blocks for the gag lever post can be with the base fixed more stable.
Preferably, the outer surface cover of gag lever post is equipped with the lag, the inside of lag is filled with rubber to reduce the wearing and tearing of gag lever post and spacing groove, and then increase the life of gag lever post.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is:
1. the utility model is provided with a mounting plate, a mounting groove, a fixing plate, a groove, a reset spring, a clamping plate, a clamping groove, a movable rod, a pressing plate and a baffle plate, so that when an operator places the comprehensive compensation device for electric energy quality, the clamping plate can be manually pushed into the groove to compress the reset spring, then the comprehensive compensation device for electric energy quality is aligned with the mounting groove and slowly pushed downwards, when the clamping plate is pushed to the height of the clamping groove, the clamping plate can be rapidly popped out under the rebound action of the reset spring and enters the clamping groove, thereby the comprehensive compensation device for electric energy quality can be rapidly and stably installed in the mounting plate, when the comprehensive compensation device for electric energy quality needs to be disassembled, the operator can push the pressing plate to drive the baffle plate to push the clamping plate through the movable rod, after the clamping plate is completely pushed out from the inside of the clamping groove, the operator can push the comprehensive compensation device for electric energy quality upwards with force, therefore, the device can quickly realize the installation and the disassembly of the electric energy quality comprehensive compensation device, thereby greatly reducing the installation and the disassembly time of installation personnel and maintenance personnel, and having strong practicability and being worth of great popularization;
2. the utility model is also provided with a motor, a positive and negative screw rod, a movable block, a connecting rod, a limiting groove and a base, after the electric energy quality comprehensive compensation device is fixed in the mounting groove, an operator can start the motor through the controller, so that the motor drives the positive and negative screw rods to rotate, so that the positive and negative screw rods can drive the movable blocks at the positive and negative ends to move in opposite directions, so that the movable block can drive the limiting rod to move left and right through the connecting rod, when the installation and fixation are needed, the limiting rod can be quickly moved into the limiting groove in the base, and when the disassembly is needed, the limiting rod can be quickly pushed out from the limiting groove, and then further improved the stability when the compensation arrangement is synthesized to electric energy quality to whole easy operation, very be convenient for the dismantlement and the installation of the compensation arrangement is synthesized to electric energy quality.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall internal structure of the present invention;
fig. 2 is an overall elevation view of the present invention;
fig. 3 is a schematic perspective view of the electric energy quality comprehensive compensation device of the present invention;
FIG. 4 is an enlarged view of the present invention at A in FIG. 1;
FIG. 5 is an enlarged view of the present invention at B in FIG. 1;
in the figure: 1. a power quality comprehensive compensation device; 2. mounting a plate; 3. a fixing plate; 4. a groove; 5. a return spring; 6. clamping a plate; 7. mounting grooves; 8. a base; 9. a card slot; 10. a movable rod; 11. a pressing plate; 12. a baffle plate; 13. a limiting groove; 14. accommodating grooves; 15. a motor; 16. a positive and negative screw rod; 17. a movable block; 18. a connecting rod; 19. a limiting rod; 20. a controller; 21. a display panel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-5, the utility model provides a distribution network transformer electric energy quality synthesizes compensation arrangement convenient to installation, synthesize compensation arrangement 1 and mounting panel 2 including electric energy quality, mounting groove 7 has been seted up to mounting panel 2's inside, draw-in groove 9 has all been seted up to the both sides inner wall of mounting groove 7, the equal swing joint in one side that mounting groove 7 was kept away from to two draw-in grooves 9 has movable rod 10, the equal fixedly connected with baffle 12 in relative one side of two movable rod 10, the equal fixedly connected with in back of the body one side of two movable rod 10 presses the clamp plate 11, the equal fixedly connected with fixed plate 3 in both sides of electric energy quality synthesizes compensation arrangement 1, the one side that two fixed plate 3 carried on the back mutually all is seted up flutedly 4, the inner wall fixedly connected with reset spring 5 of recess 4, reset spring 5's opposite side fixedly connected with cardboard 6, the bottom fixedly connected with base 8 of electric energy quality synthesizes compensation arrangement 1.
In a preferred embodiment, an accommodating groove 14 is formed in the mounting plate 2 below the mounting groove 7, a motor 15 is fixedly connected to the bottom of an inner cavity of the accommodating groove 14, an output end of the motor 15 is fixedly connected with a positive and negative lead screw 16, a movable block 17 is movably connected to the outer surface of the positive and negative lead screw 16, a connecting rod 18 is fixedly connected to the top of the movable block 17, the top of the connecting rod 18 extends into the mounting groove 7 through a sliding groove and is fixedly connected with a limiting rod 19, a limiting groove 13 is formed in the base 8, wherein the motor 15 is respectively electrically connected with a controller 20 and a power supply through a lead wire, the motor 15 is of a model YS7211, the motor 15 is started through the controller 20, the motor 15 drives the positive and negative lead screw 16 to rotate, the positive and negative lead screws 16 can drive the movable blocks 17 at the positive and negative ends of the positive and negative lead screws to move in opposite directions, and the movable block 17 can drive the limiting rod 19 to move left and right through the connecting rod 18, thereby make when needs installation is fixed, can remove gag lever post 19 to the inside spacing groove 13 of base 8 fast, and when needs are dismantled, equally can release gag lever post 19 from spacing groove 13 inside fast, and then further improvement the stability when compensation arrangement is synthesized to electric energy quality 1 installs to whole easy operation, the very dismantlement and the installation of compensation arrangement is synthesized to electric energy quality 1 of being convenient for.
In a preferred embodiment, a controller 20 is fixedly connected to the front end surface of the mounting plate 2, and a rotary switch is fixedly connected to the outer surface of the controller 20, so that an operator can turn on and off the motor 15 conveniently.
In a preferred embodiment, a display panel 21 is installed at one side of the power quality comprehensive compensation device 1, and a display screen is arranged inside the display panel 21, so that a worker can quickly know the compensation amount required inside the power quality comprehensive compensation device 1 through the display screen.
In a preferred embodiment, two movable blocks 17 are provided and located at the front and back ends of the front and back screw rod 16 respectively, so that the limiting rod 19 can fix the base 8 more stably through the cooperation of the two movable blocks 17.
In a preferred embodiment, the outer surface of the limiting rod 19 is sleeved with a protective sleeve, and the protective sleeve is filled with rubber, so that the abrasion between the limiting rod 19 and the limiting groove 13 is reduced, and the service life of the limiting rod 19 is prolonged.
The utility model discloses a theory of operation: when an operator places the comprehensive compensation device 1 for power quality, the clamping plate 6 can be pushed into the groove 4 manually and is enabled to compress the reset spring 5, then the comprehensive compensation device 1 for power quality is aligned with the mounting groove 7 and is slowly pushed downwards, when the clamping plate 6 is pushed to the height of the clamping groove 9, the clamping plate 6 can be rapidly ejected out and enters the clamping groove 9 under the rebounding action of the reset spring 5, so that the comprehensive compensation device 1 for power quality can be rapidly and stably mounted in the mounting plate 2, when the device needs to be dismounted, the operator can push the pressing plate 11 to drive the baffle 12 to push the clamping plate 6 through the movable rod 10, after the clamping plate 6 is completely pushed out from the inside of the clamping groove 9, the operator can lift the comprehensive compensation device 1 for power quality upwards with force, and the device can rapidly mount and dismount the comprehensive compensation device 1 for power quality, and then greatly reduce the time of installation and disassembly of installation personnel and maintenance personnel, therefore, the device has extremely strong practicability and is worth popularizing, after the electric energy quality comprehensive compensation device 1 is fixed in the installation groove 7, an operator can also start the motor 15 through the controller 20, so that the motor 15 drives the positive and negative screw rod 16 to rotate, thereby the positive and negative screw rod 16 can drive the movable blocks 17 at the positive and negative ends to move in opposite directions or opposite directions, further the movable block 17 can drive the limiting rod 19 to move left and right through the connecting rod 18, thereby when the installation and the fixation are needed, the limiting rod 19 can be quickly moved into the limiting groove 13 in the base 8, and when the disassembly is needed, the limiting rod 19 can be quickly pushed out from the inside of the limiting groove 13, further improving the stability of the electric energy quality comprehensive compensation device 1 during the installation, and the whole operation is simple, and the disassembly and the assembly of the electric energy quality comprehensive compensation device 1 are very convenient.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a distribution network transformer electric energy quality synthesizes compensation arrangement convenient to installation, synthesizes compensation arrangement (1) and mounting panel (2) including electric energy quality, its characterized in that: the mounting plate is characterized in that a mounting groove (7) is formed in the mounting plate (2), clamping grooves (9) are formed in the inner walls of the two sides of the mounting groove (7), movable rods (10) are movably connected to one sides of the two clamping grooves (9) far away from the mounting groove (7), a baffle (12) is fixedly connected to one side of each of the two movable rods (10) opposite to the other side of each of the two movable rods (10), and a pressing plate (11) is fixedly connected to the opposite side of each of the two movable rods (10), both sides of the electric energy quality comprehensive compensation device (1) are fixedly connected with fixed plates (3), one side of each of the two fixed plates (3) which is opposite to each other is provided with a groove (4), the inner wall of the groove (4) is fixedly connected with a return spring (5), the other side of the return spring (5) is fixedly connected with a clamping plate (6), the bottom of the electric energy quality comprehensive compensation device (1) is fixedly connected with a base (8).
2. The power quality comprehensive compensation device for the distribution network transformer, which is convenient to install, according to claim 1, is characterized in that: mounting panel (2) inside below that is located mounting groove (7) has seted up holding tank (14), the inner chamber bottom fixedly connected with motor (15) of holding tank (14), the positive and negative lead screw (16) of output fixedly connected with of motor (15), the surface swing joint of positive and negative lead screw (16) has movable block (17), the top fixedly connected with connecting rod (18) of movable block (17), the top of connecting rod (18) is passed through the spout and is extended to the inside and fixedly connected with gag lever post (19) of mounting groove (7), spacing groove (13) have been seted up to the inside of base (8).
3. The power quality comprehensive compensation device for the distribution network transformer, which is convenient to install, according to claim 1, is characterized in that: the front end fixed surface of mounting panel (2) is connected with controller (20), the surface fixed connection of controller (20) has rotary switch.
4. The power quality comprehensive compensation device for the distribution network transformer, which is convenient to install, according to claim 1, is characterized in that: display panel (21) are installed to one side of compensation arrangement (1) is synthesized to electric energy quality, display panel (21) inside is provided with the display screen.
5. The power quality comprehensive compensation device for the distribution network transformer, which is convenient to install, according to claim 2, is characterized in that: the movable blocks (17) are provided with two movable blocks which are respectively positioned at the positive and negative ends of the positive and negative screw rods (16).
6. The power quality comprehensive compensation device for the distribution network transformer, which is convenient to install, according to claim 2, is characterized in that: the outer surface cover of gag lever post (19) is equipped with the lag, the inside of lag is filled with rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120950047.XU CN214674367U (en) | 2021-05-06 | 2021-05-06 | Distribution network transformer electric energy quality comprehensive compensation device convenient to install |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120950047.XU CN214674367U (en) | 2021-05-06 | 2021-05-06 | Distribution network transformer electric energy quality comprehensive compensation device convenient to install |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214674367U true CN214674367U (en) | 2021-11-09 |
Family
ID=78474250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120950047.XU Active CN214674367U (en) | 2021-05-06 | 2021-05-06 | Distribution network transformer electric energy quality comprehensive compensation device convenient to install |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214674367U (en) |
-
2021
- 2021-05-06 CN CN202120950047.XU patent/CN214674367U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214044432U (en) | Intelligent silicon controlled reactive power compensator | |
| CN214674367U (en) | Distribution network transformer electric energy quality comprehensive compensation device convenient to install | |
| CN212136988U (en) | Armored movable high-voltage switch equipment | |
| CN217588612U (en) | Transformer installation base with adjustable | |
| CN208874118U (en) | A kind of intelligent box change device facilitating installing and dismounting | |
| CN217134140U (en) | Transformer for power engineering with regulatory function | |
| CN211014418U (en) | Embedded comprehensive metering box of low pressure | |
| CN211126507U (en) | Fire control switch board | |
| CN220042722U (en) | Power control box convenient to installation | |
| CN212056411U (en) | Fast dismounting's reactive power compensation controller | |
| CN211266169U (en) | High-voltage metering box convenient to install | |
| CN108758221A (en) | A kind of communication equipment holder that can highly adjust | |
| CN218549399U (en) | Power cable is with adjustable chain staple bolt | |
| CN215497822U (en) | Low-voltage power distribution cabinet is administered to electric wire netting harmonic | |
| CN216850939U (en) | Electrical distribution box convenient to disassemble and assemble | |
| CN217282228U (en) | Efficient automatic reactive power compensation device | |
| CN210378689U (en) | High-low voltage distribution transformer convenient to install and maintain | |
| CN220358022U (en) | Locking device of high-voltage vacuum circuit breaker | |
| CN214379551U (en) | AC/DC screen power cabinet convenient to install | |
| CN216649574U (en) | Photovoltaic panel deflection structure for photovoltaic power generation equipment | |
| CN217968510U (en) | Panel compression fittings is used in production of box-type substation | |
| CN207844223U (en) | A kind of safty shield module and safety relay device | |
| CN213583467U (en) | Voltage transformer convenient to installation | |
| CN221150585U (en) | Power distribution switch cabinet | |
| CN216957617U (en) | Arrester fixing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Shihong Inventor after: Gan Zhixiang Inventor after: Shen Yibo Inventor before: Wang Shihong Inventor before: Gan Zhixiang Inventor before: Shen Yibo |