CN114307454B - Filter element safety replacement device for bag filter - Google Patents
Filter element safety replacement device for bag filter Download PDFInfo
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- CN114307454B CN114307454B CN202111477545.8A CN202111477545A CN114307454B CN 114307454 B CN114307454 B CN 114307454B CN 202111477545 A CN202111477545 A CN 202111477545A CN 114307454 B CN114307454 B CN 114307454B
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention relates to a safe replacement device for a filter element of a bag filter, which comprises a bracket, an X-axis moving mechanism, a Y-axis moving mechanism and a replacement mechanism; the X-axis moving mechanism is arranged on the support, two ends of the Y-axis moving mechanism are connected with the X-axis moving mechanism, and the replacing mechanism is arranged on the Y-axis moving mechanism. The device can realize remote isolation remote control automatic disassembly and assembly of the filter element, greatly reduce the irradiated level of operators during the filter element replacement operation, ensure that the maintenance of the bag filter is safer, improve the efficiency of the replacement operation, and reduce the secondary pollution caused by filter element fly ash during the replacement operation.
Description
Technical Field
The invention belongs to the field of radiation protection, and particularly relates to a safety replacement device for a filter element of a bag filter.
Background
The domestic waste generated by nuclear related facilities has urgent capacity reduction treatment requirements, compared with overpressure and cement solidification, the incineration treatment can greatly reduce the waste volume, and is an international general technology for treating radioactive solid combustible waste; in the operation and maintenance of the incineration facility, the method reduces the irradiated dose of operators, increases the automation degree of each operation link, and has positive significance for improving the safety and efficiency of the radioactive waste incineration.
The bag filter is key equipment of the radioactive waste incineration purification system, and the stable operation of the bag filter is an important factor for ensuring the whole operation safety of the incineration facility; the bag filter mainly comprises a clean room shell, a filter element, a back-blowing ash discharging component and the like, wherein the filter element is generally sealed on a flower plate between the clean rooms in a three-dimensional way, and the normal service life of the filter element is 1-2 years; along with the long-term use of the bag filter, the filter element needs to be replaced to ensure the operation safety of the incineration system, the manual operation of bag discharging and bag feeding is generally performed in the conventional replacement operation, the labor intensity is high, due to the dispersion characteristic of fly ash, radiation potential safety hazards such as illumination and suction exist in the replacement operation, the remote-isolation remote-control automatic replacement is very necessary to be performed in a targeted manner so as to facilitate the operation of replacing the filter element, thereby reducing the radiation dose born by operators during the operation, and improving the safety and the operation efficiency of the system.
Disclosure of Invention
Aiming at the demands in the prior art, the invention provides the safe replacement device for the filter element of the bag filter, which realizes remote isolation remote control automatic disassembly and assembly of the filter element, greatly reduces the irradiated level of operators during the replacement operation of the filter element, ensures that the maintenance of the bag filter is safer, improves the efficiency of the replacement operation, and reduces the secondary pollution caused by the fly ash of the filter element.
In order to achieve the above purpose, the invention adopts the technical scheme that: the safety replacement device for the filter element of the bag filter comprises a bracket, an X-axis moving mechanism, a Y-axis moving mechanism and a replacement mechanism; the X-axis moving mechanism is arranged on the bracket, two ends of the Y-axis moving mechanism are connected with the X-axis moving mechanism, and the replacing mechanism is arranged on the Y-axis moving mechanism.
Further, the X-axis moving mechanism comprises a group of X-axis guide rails, an X-axis lead screw and an X-axis driving motor; the support consists of a rectangular frame body and four supporting legs, the rectangular frame body is horizontally arranged, the four supporting legs are vertically arranged in a rectangular shape, and the upper end of each supporting leg is fixedly connected with one corner of the lower surface of the rectangular frame body; one X-axis guide rail is arranged on one side of the upper surface of the rectangular frame body, the other X-axis guide rail is arranged on the other side of the upper surface of the rectangular frame body, the two X-axis guide rails are parallel, an X-axis lead screw is horizontally arranged above the X-axis guide rail, and one end of the X-axis lead screw is fixedly connected with a motor shaft of an X-axis driving motor.
Further, the Y-axis moving mechanism comprises a Y-axis driving motor, a Y-axis lead screw, two Y-axis guide rails and a cross beam; the crossbeam level sets up, the one end and the X axle lead screw thread drive of crossbeam, the lower surface and the X axle guide rail sliding connection of crossbeam one end, two Y axle guide rails parallel mount side by side are at the upper surface of crossbeam, and the Y axle guide rail is parallel with the crossbeam along length direction's central line, Y axle lead screw level sets up between two Y axle guide rails, the one end and the motor shaft fixed connection of Y axle driving motor of Y axle lead screw, Y axle driving motor fixed mounting is on the crossbeam, change the upper end and the Y axle lead screw thread drive of mechanism.
Further, change the mechanism and include protective sheath, Z axle remove the subassembly, turn over board assembly, remove the card, registration arm, a set of anchor clamps and anchor clamps drive assembly, the vertical setting of protective sheath, the upper end and the Y axle lead screw thread drive of protective sheath, the upper end of protective sheath still with two Y axle guide rail sliding connection, Z axle removes the subassembly and removes the card and install in the protective sheath from top to bottom, Z axle removes the subassembly and removes card thread drive, the vertical setting of registration arm, the upper end of registration arm is connected with the lower surface of removing the card, anchor clamps drive assembly installs in the protective sheath, a set of anchor clamps with anchor clamps drive assembly is connected, turn over board assembly installs the lower extreme at the protective sheath.
Further, the Z-axis moving assembly comprises a Z-axis driving motor and a Z-axis lead screw; the Z-axis driving motor is fixedly arranged in the protective sleeve, the Z-axis lead screw is vertically arranged in the protective sleeve, the upper end of the Z-axis lead screw is connected with a motor shaft of the Z-axis driving motor through a coupling, and the movable flower plate is in threaded transmission with the Z-axis lead screw.
Further, the board subassembly turns over including the below and turns over board, turns over board drive cylinder and turns over board drive connecting rod, and the below turns over the board setting and is connected with one side rotation of protective sheath lower extreme opening part in one side of turning over the board, turns over board drive cylinder fixed mounting on the lateral wall of protective sheath, turns over board drive cylinder and turns over board connection with the below through turning over board drive connecting rod.
Further, the clamp driving assembly comprises a clamp driving rotating shaft, a clamp driving connecting rod and a clamp driving air cylinder, wherein the clamp driving air cylinder is fixedly arranged on the protective cover, the clamp driving rotating shaft is vertically arranged in the protective cover, the upper end of the clamp driving rotating shaft is connected with the clamp driving air cylinder, and the lower end of the clamp driving rotating shaft is connected with a group of clamps through the clamp driving connecting rod.
The beneficial technical effects of the invention are as follows:
(1) The replacing mechanism is arranged above the filter element in an accurate positioning mode, the grabbing mechanism is started to grip the top of the filter element by the descending replacing mechanism, the waste filter element is lifted into the protective sleeve by the lifting replacing mechanism, and the old filter element is arranged in the waste barrel by the moving device; grasping a new filter element, accurately positioning the new filter element to an installation position, lowering the replacement mechanism, loading the new filter element into equipment for sealing and fixing, loosening the grasping mechanism, and lifting the replacement mechanism to complete a group of replacement; after the repeated operation is completed and all the filter elements are replaced, the top cover of the bag filter is closed to realize the whole safe replacement of the filter element of the bag filter;
(2) The replacing device is operated in the sealed box body, remote isolation remote control automatic operation is realized, the personnel exposure level of manual replacement is greatly reduced, and the safety of a system is improved;
(3) The invention reduces the operation difficulty, improves the efficiency and reduces the operation strength of replacement.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view of a replacement structure;
fig. 4 is a schematic view of the exterior structure of the replacement structure.
In the figure:
the device comprises a 1-bracket, a 101-rectangular frame body, 102-supporting legs, a 2-X axis guide rail, a 3-X axis screw rod, a 4-X axis driving motor, a 5-replacement mechanism, a 6-Y axis driving motor, a 7-Y axis screw rod, an 8-Y axis guide rail, a 9-protective sleeve, a 10-Z axis driving motor, an 11-Z axis screw rod, a 12-movable flower plate, a 13-positioning tube, a 14-clamp, a 15-lower turning plate, a 16-clamp driving rotating shaft, a 17-clamp driving connecting rod, an 18-clamp driving cylinder, a 19-turning plate driving cylinder, a 20-turning plate driving connecting rod and a 21-cross beam.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the device for safely replacing the filter element of the bag filter provided by the invention comprises a bracket 1, an X-axis moving mechanism, a Y-axis moving mechanism and a replacing mechanism 5; the X-axis moving mechanism is arranged on the bracket 1, and the two ends of the Y-axis moving mechanism are connected with the X-axis moving mechanism and the replacing mechanism 4 is arranged on the Y-axis moving mechanism.
When the replacement device is used, the replacement mechanism can be moved with high precision through the xyz three-way screw rod and the driving device thereof; positioning is achieved by aligning the positioning tube with the replaced filter bag; the locking and unlocking of the filter element port are realized through the structures such as the cylinder connecting rod and the like; therefore, the filter element is replaced by remote control, so that the efficiency is improved, the radiation dose born by workers during operation is reduced, and the operation flow is safer; the secondary pollution caused by the fly ash of the filter element is greatly reduced by arranging a closed operation box and controlling the air flow during operation; when the standby bag filter exists, the radioactive bag filter bag can be replaced in operation.
Based on this, the X-axis moving mechanism includes two X-axis guide rails 2, an X-axis screw 3, and an X-axis driving motor 4; the bracket 1 consists of a rectangular frame body 101 and a group of supporting legs 102, wherein the rectangular frame body 101 is horizontally arranged, four supporting legs 102 are vertically arranged in a rectangular shape, and the upper end of each supporting leg 102 is fixedly connected with one corner of the lower surface of the rectangular frame body 101; one X-axis guide rail 2 is arranged on one side of the upper surface of the rectangular frame 101, the other X-axis guide rail 2 is arranged on the other side of the upper surface of the rectangular frame 101, the two X-axis guide rails 2 are parallel, an X-axis lead screw 3 is horizontally arranged above the one X-axis guide rail 2, and one end of the X-axis lead screw 3 is fixedly connected with a motor shaft of an X-axis driving motor 4.
Based on this, the Y-axis moving mechanism includes a Y-axis drive motor 6, a Y-axis screw 7, two Y-axis guide rails 8, and a cross beam 21; the crossbeam 21 level sets up, the crossbeam 21 with X axle lead screw 3 screw thread drive, the lower surface and the X axle guide rail 2 sliding connection at crossbeam 21 both ends, two Y axle guide rails 8 are parallel to each other and are installed in the upper surface of crossbeam 21, and Y axle guide rail 8 is parallel with the central line of crossbeam 21 along length direction's central line, Y axle lead screw 7 level sets up between two Y axle guide rails 8, Y axle lead screw 7's one end and Y axle driving motor 6's motor shaft fixed connection, Y axle driving motor 6 fixed mounting is on crossbeam 21, the upper end and the Y axle lead screw 7 screw thread drive of change mechanism 5.
Based on this, change mechanism 5 includes protective sheath 9, Z axle remove subassembly, turns over board subassembly, removes colored board 12, registration arm 13, a set of anchor clamps 14 and anchor clamps drive assembly, and protective sheath 9 is vertical to be set up, and the upper end and the Y axle lead screw 7 screw drive of protective sheath 9, and the upper end of protective sheath 9 still is with a set of Y axle guide rail 8 sliding connection, Z axle removes subassembly and removes colored board 12 from top to bottom and installs in protective sheath 9, Z axle removes the subassembly and is connected with removing colored board 12, and registration arm 13 is vertical to be set up, and the upper end of registration arm 13 is connected with the lower surface of removing colored board 12, anchor clamps drive assembly installs in protective sheath 9, four anchor clamps 14 with anchor clamps drive assembly is connected, turn over board assembly installs the lower extreme at protective sheath 9.
Based on this, the Z-axis moving assembly includes a Z-axis driving motor 10 and a Z-axis screw 11; the Z-axis driving motor 10 is fixedly arranged in the protective sleeve 9, the Z-axis lead screw 11 is vertically arranged in the protective sleeve 9, the upper end of the Z-axis lead screw 11 is fixedly connected with a motor shaft of the Z-axis driving motor 10, and the movable flower plate 12 and the Z-axis lead screw 11 are in threaded transmission.
Based on this, the board subassembly includes below board 15, board drive cylinder 19 and board drive connecting rod 20 turns over, and below board 15 sets up in the lower extreme opening part of protective sheath 9, and one side that the below was turned over board 15 rotates with one side of protective sheath 9 lower extreme opening part and is connected, turns over board drive cylinder 19 fixed mounting on the lateral wall of protective sheath 9, turns over board drive cylinder 19 and turns over board 15 through board drive connecting rod 20 and be connected below.
Based on this, the clamp driving assembly comprises a clamp driving rotating shaft 16, a clamp driving connecting rod 17 and a clamp driving air cylinder 18, wherein the clamp driving air cylinder 18 is fixedly arranged on the protective cover 9, the clamp driving rotating shaft 16 is vertically arranged in the protective cover 9, the upper end of the clamp driving rotating shaft 16 is connected with the clamp driving air cylinder 18, and the lower end of the clamp driving rotating shaft 16 is connected with a group of clamps 14 through the clamp driving connecting rod 17.
The invention is realized in such a way that after the cover plate of the bag filter is removed, the replacement device rotates and moves the replacement mechanism 5 to the horizontal position approximately corresponding to the filter bag through the X-axis screw 3 and the Y-axis screw 7; after moving to the approximate position, the lower turnover 15 is opened by a turnover driving cylinder 19 and a turnover connecting rod 20; the Z-axis screw rod 11 of the replacing mechanism 5 rotates through the Z-axis driving motor 10 to descend the movable flower plate 12, and the movable flower plate is stopped when the lower end of the positioning tube 13 connected with the movable flower plate 12 is 1-3 cm above the filter element port; the horizontal position of the replacement mechanism 5 is finely adjusted through the X-axis lead screw 3 and the Y-axis lead screw 7, so that the movable flower plate 12 is connected with the positioning tube 13 to be aligned with the filter bag interface; the movable flower plate 12 is moved downwards through the Z-axis lead screw 11, so that a positioning pipe 13 connected with the movable flower plate 12 is tightly connected with the port of the filter element; the clamp driving cylinder 18 rotates the clamp rotating shaft 16, and the 4 clamps 14 are synchronously rotated under the drive of the clamp driving connecting rod 17 to lock the filter element port; . Lifting through a Z-axis screw rod 11 after locking, taking out the filter element from the bag filter, and taking in the protective sleeve 9; the replacement mechanism 5 is moved out of the upper part of the bag filter to be replaced by rotating the X-axis screw 3 and the Y-axis screw 7; after replacement, the replacement mechanism 5 is moved to the upper part of the bag filter by rotating the X-axis screw 3 and the Y-axis screw 7, and a new filter element is put into the bag filter by descending the Z-axis screw 11; after the device is put in, 4 clamps 14 are driven and unlocked through a clamp driving cylinder 18, and the replacement mechanism 5 is lifted through a Z-axis screw 11; and circularly executing the operation to finish the replacement of each filter element in the bag filter.
The safety replacement device for the filter element of the bag filter is not limited to the specific embodiment, and other embodiments are obtained by a person skilled in the art according to the technical scheme of the invention, and the safety replacement device also belongs to the technical innovation scope of the invention.
Claims (3)
1. The utility model provides a bag filter core safety replacement device which characterized in that: the safe replacement device for the filter element of the bag filter comprises a bracket (1), an X-axis moving mechanism, a Y-axis moving mechanism and a replacement mechanism (5); the X-axis moving mechanism is arranged on the bracket (1), two ends of the Y-axis moving mechanism are connected with the X-axis moving mechanism, and the replacing mechanism (5) is arranged on the Y-axis moving mechanism;
the X-axis moving mechanism comprises two X-axis guide rails (2), an X-axis lead screw (3) and an X-axis driving motor (4); the bracket (1) consists of a rectangular frame body (101) and four supporting legs (102), wherein the rectangular frame body (101) is horizontally arranged, the four supporting legs (102) are vertically arranged in a rectangular shape, and the upper end of each supporting leg (102) is fixedly connected with one corner of the lower surface of the rectangular frame body (101); one X-axis guide rail (2) is arranged on one side of the upper surface of the rectangular frame body (101), the other X-axis guide rail (2) is arranged on the other side of the upper surface of the rectangular frame body (101), the two X-axis guide rails (2) are parallel, an X-axis lead screw (3) is horizontally arranged above the one X-axis guide rail (2), and one end of the X-axis lead screw (3) is connected with a motor shaft of an X-axis driving motor (4) through a coupling;
the Y-axis moving mechanism comprises a Y-axis driving motor (6), a Y-axis lead screw (7), two Y-axis guide rails (8) and a cross beam (21); the X-axis guide rail (2) is arranged on the upper surface of the cross beam (21), the center line of the Y-axis guide rail (8) along the length direction is parallel to the center line of the cross beam (21) along the length direction, the Y-axis guide screw (7) is horizontally arranged between the two Y-axis guide rails (8), one end of the Y-axis guide screw (7) is fixedly connected with a motor shaft of the Y-axis driving motor (6), the Y-axis driving motor (6) is fixedly arranged on the cross beam (21), and the upper end of the replacement mechanism (5) is in threaded transmission with the Y-axis guide screw (7);
the replacing mechanism (5) comprises a protective sleeve (9), a Z-axis moving assembly, a turning plate assembly, a positioning tube (13), a group of clamps (14) and a clamp driving assembly, wherein the protective sleeve (9) is vertically arranged, the upper end of the protective sleeve (9) is in threaded transmission with a Y-axis lead screw (7), the upper end of the protective sleeve (9) is also in sliding connection with two Y-axis guide rails (8), the Z-axis moving assembly and a movable flower plate (12) are installed in the protective sleeve (9) from top to bottom, the Z-axis moving assembly is connected with the movable flower plate (12), the positioning tube (13) is vertically arranged, the upper end of the positioning tube (13) is connected with the lower surface of the movable flower plate (12), the clamp driving assembly is installed in the protective sleeve (9), the group of clamps (14) is connected with the clamp driving assembly, and the turning plate assembly is installed at the lower end of the protective sleeve (9).
The flap assembly comprises a lower flap (15), a flap driving cylinder (19) and a flap driving connecting rod (20), wherein the lower flap (15) is arranged at the opening of the lower end of the protective sleeve (9), one side of the lower flap (15) is rotatably connected with one side of the opening of the lower end of the protective sleeve (9) through a hinge, the flap driving cylinder (19) is fixedly arranged on the outer side wall of the protective sleeve (9), and the flap driving cylinder (19) is connected with the lower flap (15) through the flap driving connecting rod (20).
2. A bag filter cartridge safety replacement apparatus as defined in claim 1, wherein: the Z-axis moving assembly comprises a Z-axis lead screw (11) of a Z-axis driving motor (10) and a moving flower plate (12); the Z-axis driving motor (10) is fixedly arranged in the protective sleeve (9), the Z-axis lead screw (11) is vertically arranged in the protective sleeve (9), the upper end of the Z-axis lead screw (11) is fixedly connected with a motor shaft of the Z-axis driving motor (10), and the movable flower plate (12) is in threaded transmission with the Z-axis lead screw (11).
3. The bag filter cartridge safety replacement apparatus of claim 1, wherein: the clamp driving assembly comprises a clamp driving rotating shaft (16), a clamp driving connecting rod (17) and a clamp driving air cylinder (18), wherein the clamp driving air cylinder (18) is fixedly arranged on the protective sleeve (9), the clamp driving rotating shaft (16) is vertically arranged in the protective sleeve (9), the upper end of the clamp driving rotating shaft (16) is connected with the clamp driving air cylinder (18), and the lower end of the clamp driving rotating shaft (16) is connected with a group of clamps (14) through the clamp driving connecting rod (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111477545.8A CN114307454B (en) | 2021-12-06 | 2021-12-06 | Filter element safety replacement device for bag filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111477545.8A CN114307454B (en) | 2021-12-06 | 2021-12-06 | Filter element safety replacement device for bag filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114307454A CN114307454A (en) | 2022-04-12 |
| CN114307454B true CN114307454B (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111477545.8A Active CN114307454B (en) | 2021-12-06 | 2021-12-06 | Filter element safety replacement device for bag filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN114307454B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116870626A (en) * | 2022-06-17 | 2023-10-13 | 金华华东环保设备有限公司 | Method for replacing filter bag of electric modified bag dust collector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4773922A (en) * | 1987-07-22 | 1988-09-27 | The United States Of America As Represented By The United States Department Of Energy | Remotely serviced filter and housing |
| JPH10274692A (en) * | 1997-03-31 | 1998-10-13 | Hitachi Zosen Corp | Filter supplying facility |
| CN105467425A (en) * | 2014-09-05 | 2016-04-06 | 中国辐射防护研究院 | Radioactive source remote-control pickup device applicable to well-type ionization chamber standard device |
| RU152748U1 (en) * | 2015-02-05 | 2015-06-20 | Акционерное общество "Прогресс-Экология" | DEVICE FOR INSTALLATION AND CHANGE OF AEROSOLIC FILTERS OF A NUCLEAR POWER PLANT |
| CN107398110A (en) * | 2017-09-01 | 2017-11-28 | 苏州百硕自动化环保设备有限公司 | A kind of filter of automatically replaceable filter core |
| CN212141814U (en) * | 2020-03-21 | 2020-12-15 | 湖南钧众环保科技发展有限公司 | Cloth bag replacing device of bag type dust collector |
| CN111735574A (en) * | 2020-07-29 | 2020-10-02 | 广东栗子科技有限公司 | Filter core material loading check out test set |
| CN213408067U (en) * | 2020-09-21 | 2021-06-11 | 成都展新电熔耐火材料有限公司 | Cloth bag type dust remover |
| CN112599276B (en) * | 2020-12-09 | 2022-07-15 | 中广核研究院有限公司 | Nuclear power plant radioactive waste filter element carrying device |
| CN112676830B (en) * | 2020-12-09 | 2022-02-25 | 中广核研究院有限公司 | Automatic filter element disassembling and transferring device |
| CN112755666A (en) * | 2020-12-30 | 2021-05-07 | 高淑兰 | Air pollution administers with industry sack cleaner that can change sack automatically |
| CN112675626B (en) * | 2021-03-12 | 2021-06-29 | 佛山市绿源亚太环保设备科技有限公司 | Intelligent dust collector for flue gas cloth bag |
| CN113713462B (en) * | 2021-09-14 | 2023-04-07 | 深圳市陶氏水处理设备技术开发有限公司 | Water purifier with automatic filter element replacing function and automatic filter element replacing method |
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2021
- 2021-12-06 CN CN202111477545.8A patent/CN114307454B/en active Active
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