CN209771582U - High-precision combined separation filter - Google Patents
High-precision combined separation filter Download PDFInfo
- Publication number
- CN209771582U CN209771582U CN201920520584.3U CN201920520584U CN209771582U CN 209771582 U CN209771582 U CN 209771582U CN 201920520584 U CN201920520584 U CN 201920520584U CN 209771582 U CN209771582 U CN 209771582U
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- filter
- separating
- filter screen
- cylinder
- bottom plate
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- 238000000926 separation method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000005192 partition Methods 0.000 claims description 32
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 13
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 13
- 241001330002 Bambuseae Species 0.000 abstract description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 13
- 239000011425 bamboo Substances 0.000 abstract description 13
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000011282 treatment Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 22
- 238000001914 filtration Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000011001 backwashing Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
The utility model belongs to the water treatment facilities field, in particular to high accuracy combination separation filter, including the filter unit, the filter unit is all including separating a section of thick bamboo, set up the filter screen in separating a section of thick bamboo, transversely set up between separating a section of thick bamboo and the filter screen and separate the area, axial setting drive shaft in the filter screen, the drive shaft connection driver, the below of drive shaft sets up the axis, axis and drive shaft periphery suit compress tightly the subassembly, the filter screen bottom sets up the bottom plate, the bottom plate below sets up the baffle, the baffle becomes to separate the chamber with separating a section of thick bamboo, baffle periphery and barrel inner wall connection, axis intercommunication water outlet assembly, the bottom plate periphery communicates air inlet assembly respectively, the barrel bottom sets up the drain, barrel one side sets up the water inlet, the barrel top sets up the oil extraction gas vent respectively and washes the export. The multi-unit realizes a plurality of independent separation filter organizations in the cylinder body, realizes that one unit in one space washes other normal work, and each unit can work simultaneously, thus saving space.
Description
Technical Field
The utility model relates to a high accuracy combination separation filter belongs to the water treatment facilities field.
Background
The fiber ball filter and the cellulose filter in the prior art are widely applied to the treatment of suspended matters and oil in the departments of clear water filtration, oilfield sewage treatment, smelting, chemical engineering, machinery or light industry and the like. With the development of petroleum deep exploitation and chemical enterprises in large scale and strict requirements on environmental protection, separation technology for sewage containing suspended matters and oil is increasingly emphasized. The lower filtration equipment of present filter fineness faces the difficult problem that the play water precision is low to be up to standard, and the filter goes out water and is unstable, and the later stage is poor because of the malignant effect of accumulating water of filter material, therefore the backwash just need consume a large amount of clear water, and equipment area is big, needs a plurality of jar body units to assemble into the online operation of system and just can wash, and some needs one to prepare one and waste the multi-purpose equipment in space specially.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the high-precision combined separation filter can use the inlet water washing filter material to save the use amount of the clear water backwashing, has small occupied area and high processing precision, and can simultaneously realize the inlet water washing and outlet water backwashing functions by the in-line operation in a tank body.
High accuracy combination separation filter, the novel nipple rectifier comprises a cylindrical shel, set up the filter unit in the barrel respectively, the filter unit all includes the section of thick bamboo that separates that sets up along the barrel axial, set up the filter screen in separating the section of thick bamboo, it separates the area to transversely set up between a section of thick bamboo and the filter screen, axial setting drive shaft in the filter screen, the drive shaft connection driver, the below of drive shaft sets up the axis, axis and drive shaft periphery suit compress tightly the subassembly, the filter screen bottom sets up the bottom plate, the bottom plate below sets up the baffle, the baffle becomes to separate the chamber with separating the section of thick bamboo, baffle periphery and barrel inner wall connection, axis intercommunication water outlet assembly, the barrel lower part sets up the drain, barrel one side sets up the water inlet, the barrel top sets up the oil extraction gas vent respectively and washes the export, oil extraction gas vent and separate the outer intercommunication of section of thick bamboo, wash export and filter screen in-.
The pressing assembly comprises a filter column, the filter column is sleeved on the middle shaft and the driving shaft, and a pressing plate is arranged between the top of the filter column and the bottom of the driving shaft.
The pressing assembly is characterized in that a washing unit is arranged below the pressing assembly and comprises a lifting chain and a ventilating assembly, one end of the lifting chain is connected with the outer side of the filter column, the other end of the lifting chain is fixed on the tray, the tray is sleeved on the middle shaft and is located above the bottom plate, the pressing plate and the tray are respectively and horizontally placed inside the filter screen, and the outer diameters of the pressing plate and the tray are matched with the inner diameter of the filter screen.
The ventilation assembly comprises an air pipe, the air pipe is transversely arranged in the barrel body, air nozzles are vertically distributed on the air pipe upwards, the top ends of the air nozzles penetrate through the bottom plate and are flush with the top surface of the bottom plate, and a nozzle sealing surface is arranged on the bottom surface of the tray corresponding to the air nozzles.
The filter units are arranged in a plurality of numbers and are uniformly distributed in the cylinder body.
The pressing plate edge be equipped with the through-hole, separate the area and be located the top that compresses tightly the subassembly.
The water outlet component comprises a water outlet pipe, the inner end of the water outlet pipe is positioned in the clapboard and communicated with the middle shaft, the outer end of the water outlet pipe penetrates out of the cylinder body,
The part of the water outlet pipe arranged outside the cylinder body is communicated with the backflushing water inlet pipe.
the top of the separating cylinder is fixed in the cylinder through a support, the support stabilizes the filter screen and the separating cylinder and arranges the retaining edge on the cylinder, and the retaining edge is arranged on the cylinder, and the lower part of the filter screen is provided with a side weir.
The flanges are provided with through holes communicated with the cylinder body.
And a shaft sleeve is arranged between the middle shaft and the partition plate and is fixedly connected with the bottom plate and the partition plate respectively.
The water inlet can set up to two, arrange the baffle upper and lower both sides respectively in, only use during the use one of them can, can select one of them water inlet during the use, when selecting for use the water inlet of top, from the top mouth intaking, the import below is sealed, the through-hole that sets up on the water intaking from separating a section of thick bamboo top lateral wall of top, this through-hole increases the trompil, gets into in separating a section of thick bamboo, from the recoil water inlet rush-in during the back flush, goes out from washing the export. When the water inlet below is selected, water enters from the lower port, and the unit needing backwashing can be backwashed during filtering without separately feeding water from the backwashing water inlet pipe. The following water inlets are taken as an example in this embodiment.
The separating belt is annular, water flow is changed between the filter screen and the separating cylinder, the air nozzle is in surface contact with the tray, the partition plate is arranged in the cylinder, the shaft sleeve is connected with the partition plate to stabilize the middle shaft, the support stabilizes the filter screen and the separating cylinder and is arranged on the flange, and the flange is arranged on the cylinder. The filter material is arranged in the filter screen, one end of the filter screen is provided with a side weir for blocking the medium, the shaft drives the pressing plate, the edge of the pressing plate is provided with a through hole, the filter column and the middle shaft are provided with through holes, one side of the tray is provided with a nozzle sealing surface, the tray moves the filter material when being washed, the shaft sleeve is provided with a sealing middle shaft root, the bottom plate is provided with a through hole, the partition plate is provided with a through hole, the through hole on the partition plate is only arranged in.
When the filter material flushing device works, the driver pushes the driving shaft to drive the pressing plate and the filter column to compress a filter material along the central shaft, water enters the lower part in the cylinder from the water inlet to carry out cyclone gravity separation on particles, then passes through the partition plate to fill the space of the partition cylinder and the cylinder, flows through the bottom plate to pass through the tray and the filter screen, is filtered by the filter material, then enters the filter column to pass through the central shaft to reach the water outlet, separated floating particles are transferred to the upper part of the pressing plate in the filter screen from the flange through hole to the oil discharge exhaust port to be discharged from the oil discharge exhaust port through the partition plate, a plurality of units are arranged in the cylinder, when the filter material is flushed, the driver of one unit drives the driving shaft to loosen the pressing plate and the filter column to loosen the filter material, the filter column drives the lifting chain and the lifting chain to pull the tray to the set part of the side weir, the, The separating belt is arranged between the filter screen and the separating cylinder clamp to ensure that fluid is flushed and enters the filter screen to flush the filter material and then is discharged at a flushing outlet, so that the fluid is prevented from being short-circuited from the filter screen and the separating cylinder clamp to the backflushing outlet directly, all the other units keep normal operation, the multiple units in the cylinder sequentially realize flushing regeneration and recovery operation, and the function of one set of system is realized in one tank.
The multi-unit realizes a plurality of independent separation filter organizations in the barrel body, realizes that one unit in one space washes all the other normal work, and the independent structure of one unit is for separating a section of thick bamboo, the filter screen, separate the area, the filter screen lower part sets up limit weir, drive shaft, driver, clamp plate, filter column, bottom plate, axle sleeve, baffle, tray, carry chain, air cock, baffle set up corresponding through-hole, trachea, recoil water inlet, delivery port, support, on the flange, wash export, filter material.
The fixed orbit relative motion of clamp plate and bottom plate in filter column and well axle, compress tightly the filter material in the filter screen and guarantee the separation filter effect of high accuracy, separate a section of thick bamboo setting and guarantee outside the filter screen that a large amount of into can get into from getting into the baffle through-hole, the cooperation separates the area and controls the rivers direction, rivers evenly separate around the filter screen when guaranteeing to move filters, the oil of dividing around the filter screen is discharged from the oil extraction exhaust hole discharge barrel from the hole of flange, the tray is pressed to the power of clamp plate motion and is closed the air cock trachea gas and can not spill too much.
During backflushing, the pressing plate and the filter column prevent the filter materials from being loosened along the central shaft, the chain is lifted to the set position of the edge weir, the medium concentration edge weir which is flushed by the air nozzle is opened to control the medium concentration edge weir to pass through the tray and effectively flush the filter materials, the filter materials are loosened during lifting of the chain, the belt barrier is arranged at the gap between the filter screen and the barrel barrier to ensure that fluid flushing enters the filter screen to flush the filter materials and then is discharged at a flushing outlet, short circuit of the fluid from the gap between the filter screen and the barrel barrier to the backflushing outlet is prevented, and the barrel barrier ensures that the.
The utility model has the advantages that:
1) The multiple operation units in one cylinder are realized, and the operation can be carried out simultaneously, and one operation unit can be cut out for cleaning under the condition of mutual noninterference.
2) The occupied space of the equipment is reduced, so that the filtering area is increased by nearly 3 times than the equivalent filtering area.
3) Saves time and labor during flushing, saves energy and reduces consumption.
4) The equipment manufacturing cost is reduced, and the utilization rate of the cylinder body is higher.
5) The filter material washing effect of the arranged structure is better.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is an enlarged schematic view of a portion B in fig. 1.
Fig. 4 is an enlarged schematic view of a portion C in fig. 1.
In the figure: 1-cylinder, 2-partition cylinder, 3-filter screen, 4-drive shaft, 5-press plate, 6-partition belt, 7-filter column, 8-middle shaft, 9-tray, 10-lifting chain, 11-bottom plate, 12-air nozzle, 13-shaft sleeve, 14-air pipe, 15-partition plate, 16-recoil water inlet pipe, 17-water outlet, 18-sewage outlet, 19-water inlet, 20-support, 21-flange, 22-flushing outlet, 23-oil discharge and exhaust port, 24-driver, 25 and edge weir.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
as shown in figures 1-4, the high precision combined separating filter of the utility model comprises a cylinder body 1, filtering units are respectively arranged in the cylinder body 1, the filtering units all comprise a separating cylinder 2 axially arranged along the cylinder body 1, a filter screen 3 is arranged in the separating cylinder 2, a separating belt 6 is transversely arranged between the separating cylinder 2 and the filter screen 3, a driving shaft 4 is axially arranged in the filter screen 3, a driver 24 is connected with the top of the driving shaft 4, a middle shaft 8 is arranged below the driving shaft 4, a pressing component is sleeved on the peripheries of the middle shaft 8 and the driving shaft 4, a bottom plate 11 is arranged at the bottom of the filter screen 3, a baffle 15 is arranged below the bottom plate 11, the baffle 15 and the separating cylinder 2 form a separating chamber, the periphery of the baffle 15 is connected with the inner wall of the cylinder body 1, the middle shaft 8 is communicated with a water outlet component, the periphery of the bottom plate 11 is respectively communicated with a water inlet, a water inlet 19 is formed in one side of the barrel body 1, the water inlet 19 is located below the partition plate 15, an oil discharge and exhaust port 23 and a flushing outlet 22 are respectively formed in the top of the barrel body 1, the oil discharge and exhaust port 23 is communicated with the outside of the partition barrel 2, the flushing outlet 22 is communicated with the inside of the filter screen 3, through holes are axially distributed in the filter column 7 and the middle shaft 8 respectively, through holes are distributed in the bottom plate 11 and the partition plate 15 respectively, and through holes communicated with the barrel body 1 are formed in the side wall of the top of the. The pressing assembly comprises a filter column 7, the filter column 7 is sleeved on a middle shaft 8 and a driving shaft 4, a pressing plate 5 is arranged between the top of the filter column 7 and the bottom of the driving shaft 4, one end of a lifting chain 10 is connected to the outer side of the filter column 7, the other end of the lifting chain 10 is fixed on two sides of a tray 9, the tray 9 is sleeved at the bottom of the middle shaft 8, and the tray 9 is located on the upper portion of a bottom plate 11. The pressing plate 5 and the tray 9 are respectively and horizontally placed inside the filter screen 3, and the outer diameters of the pressing plate 5 and the tray 9 are both adapted to the inner diameter of the filter screen 3. The number of the filter units is 4-6, and the filter units are uniformly distributed in the cylinder body 1. The edge of the pressing plate 5 is provided with a through hole, and the separation belt 6 is positioned above the pressing component. The water outlet assembly comprises a water outlet pipe, the inner end of the water outlet pipe is located in the partition plate 15 and communicated with the middle shaft 8, the outer end of the water outlet pipe penetrates out of the barrel body 1, the ventilating assembly comprises an air pipe 14, the air pipe 14 is transversely arranged in the barrel body 1, an air tap 12 is vertically distributed on the air pipe 14 upwards, the top end of the air tap 12 penetrates through the bottom plate 11 and is flush with the top surface of the bottom plate 11, and a nozzle sealing surface is arranged on the bottom surface. The part of the water outlet pipe arranged outside the cylinder body 1 is communicated with a backflushing water inlet pipe 16. The top of the separating cylinder 2 is fixed in the cylinder body 1 through a support 20, the support 20 stabilizes the filter screen 3 and the separating cylinder 2 and is arranged on a flange 21, the flange 21 is arranged on the cylinder body 1, and the lower part of the filter screen 3 is provided with a side weir 25. The rib 21 is provided with a through hole communicating with the cylinder 1. A shaft sleeve 13 is arranged between the middle shaft 8 and the partition plate 15, and the shaft sleeve 13 is fixedly connected with the bottom plate 11 and the partition plate 15 respectively.
When the device works, the driver 24 pushes the driving shaft 4 to drive the pressing plate 5 and the filter column 7 to compress the filter material along the central shaft 8, water enters the lower part in the cylinder 1 from the water inlet 19 to carry out cyclone gravity separation on particles, passes through the partition plate 15 to fill the space between the partition cylinder 2 and the cylinder 1, flows through the bottom plate 11, passes through the tray 9 and the filter screen 3, is filtered by the filter material, enters the filter column 7 to pass through the central shaft 8 to reach the water outlet 17, the separated floating particles are transferred to the upper part of the pressing plate 5 in the filter screen 3 through the baffle edge 21 to the oil discharge and exhaust port 23 after being transferred to the partition belt 6, the plurality of units are arranged in the cylinder 1, the driver 24 of one unit drives the driving shaft 4 to loosen the pressing plate 5 and the filter column 7 to loosen the filter material when the filter material is washed, the filter column 7 drives the lifting chain 10 and the lifting chain 10 to pull the tray 9 to the set position of, after the air pipe 14 stops supplying air, a large amount of water passes through the partition plate 15 and simultaneously passes through the bottom plate 11, the tray 9 and the filter screen 3, the partition belt 6 is blocked at the gap between the filter screen 3 and the partition cylinder 2 to ensure that the fluid is flushed and enters the filter screen 3 to flush the filter material and then is discharged at the flushing outlet 22, the fluid is prevented from being directly short-circuited to the backflushing outlet from the gap between the filter screen 3 and the partition cylinder 2, the rest units are kept in normal operation at the moment, the multiple units in the cylinder body 1 are sequentially flushed, regenerated and recovered to operate, and the function of one set of system is realized in.
Claims (10)
1. A high accuracy combination separation filter which characterized in that: comprises a cylinder body (1), wherein filter units are respectively arranged in the cylinder body (1), the filter units respectively comprise a separating cylinder (2) which is axially arranged along the cylinder body (1), a filter screen (3) is arranged in the separating cylinder (2), a separating belt (6) is transversely arranged between the separating cylinder (2) and the filter screen (3), a driving shaft (4) is axially arranged in the filter screen (3), the driving shaft (4) is connected with a driver (24), a middle shaft (8) is arranged below the driving shaft (4), the middle shaft (8) and the periphery of the driving shaft (4) are sleeved with a compressing assembly, a bottom plate (11) is arranged at the bottom of the filter screen (3), a partition plate (15) is arranged below the bottom plate (11), the partition plate (15) and the separating cylinder (2) form a separating cavity, the periphery of the partition plate (15) is connected with the inner wall of the cylinder body (1), the middle shaft (8) is communicated with a water outlet assembly, the top of the barrel body (1) is respectively provided with an oil discharge exhaust port (23) and a flushing outlet (22), the oil discharge exhaust port (23) is communicated with the outside of the separation barrel (2), the flushing outlet (22) is communicated with the inside of the filter screen (3), through holes are axially distributed in the middle shaft (8), through holes are respectively distributed in the bottom plate (11) and the partition plate (15), and through holes communicated with the barrel body (1) are arranged on the side wall of the top of the separation barrel (2).
2. The high precision combined separating filter as set forth in claim 1, wherein: the pressing assembly comprises a filter column (7), the filter column (7) is sleeved on the middle shaft (8) and the driving shaft (4), and a pressing plate (5) is arranged between the top of the filter column (7) and the bottom of the driving shaft (4).
3. The high precision combined separating filter as set forth in claim 1, wherein: the washing unit is arranged below the pressing assembly and comprises a lifting chain (10) and a ventilating assembly, one end of the lifting chain (10) is connected with the bottom of the pressing assembly, the other end of the lifting chain is fixed on a tray (9), the tray (9) is sleeved on a middle shaft (8), the tray (9) is located above a bottom plate (11), and the tray (9) is horizontally placed inside the filter screen (3).
4. A high precision combined separating filter according to claim 3, characterized in that: the ventilation assembly comprises an air pipe (14), the air pipe (14) is transversely arranged in the barrel body (1), air nozzles (12) are vertically distributed upwards on the air pipe (14), the top ends of the air nozzles (12) penetrate through the bottom plate (11) and are flush with the top surface of the bottom plate (11), and a nozzle sealing surface is arranged on the bottom surface of the tray (9) corresponding to the air nozzles (12).
5. The high precision combined separating filter as set forth in claim 1, wherein: the edge of the pressing plate (5) is provided with a through hole, and the separation belt (6) is positioned above the pressing component.
6. The high precision combined separating filter as set forth in claim 1, wherein: the water outlet component comprises a water outlet pipe, the inner end of the water outlet pipe is positioned in the partition plate (15) and communicated with the middle shaft (8), and the outer end of the water outlet pipe penetrates out of the barrel body (1).
7. The high precision combined separating filter as set forth in claim 6, wherein: the part of the water outlet pipe arranged outside the cylinder body (1) is communicated with the backflushing water inlet pipe (16).
8. The high precision combined separating filter as set forth in claim 1, wherein: the top of the separating cylinder (2) is fixed in the cylinder (1) through a support (20), the support (20) stabilizes the filter screen (3) and the separating cylinder (2) is arranged on the flange (21), the flange (21) is arranged on the cylinder (1), and the lower part of the filter screen (3) is provided with a side weir.
9. The high precision combination separation filter of claim 8, wherein: the flange (21) is provided with a through hole communicated with the cylinder body (1).
10. The high precision combined separating filter as set forth in claim 1, wherein: a shaft sleeve (13) is arranged between the middle shaft (8) and the partition plate (15), and the shaft sleeve (13) is fixedly connected with the bottom plate (11) and the partition plate (15) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920520584.3U CN209771582U (en) | 2019-04-17 | 2019-04-17 | High-precision combined separation filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920520584.3U CN209771582U (en) | 2019-04-17 | 2019-04-17 | High-precision combined separation filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209771582U true CN209771582U (en) | 2019-12-13 |
Family
ID=68802905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920520584.3U Active CN209771582U (en) | 2019-04-17 | 2019-04-17 | High-precision combined separation filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209771582U (en) |
-
2019
- 2019-04-17 CN CN201920520584.3U patent/CN209771582U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211112 Address after: 252000 room 2908, Tower B, Xingguang venture building, Dongchang East Road, Liaocheng Economic and Technological Development Zone, Shandong Province Patentee after: Shandong haizuan energy saving and Environmental Protection Technology Co., Ltd Address before: 255000 room 602, unit 1, building 3, Huayuan Road, Nanding Town, Zhangdian District, Zibo City, Shandong Province Patentee before: Gao Xiyi |
|
| TR01 | Transfer of patent right |