CN208726860U - Automatic winding formula grinding fluid circulation filter - Google Patents
Automatic winding formula grinding fluid circulation filter Download PDFInfo
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- CN208726860U CN208726860U CN201821391287.5U CN201821391287U CN208726860U CN 208726860 U CN208726860 U CN 208726860U CN 201821391287 U CN201821391287 U CN 201821391287U CN 208726860 U CN208726860 U CN 208726860U
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- filter
- roller
- tank
- coiled strip
- filter material
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- 239000012530 fluid Substances 0.000 title claims abstract description 53
- 238000004804 winding Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000007664 blowing Methods 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 37
- 239000004744 fabric Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 description 11
- 239000008187 granular material Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 210000003734 kidney Anatomy 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
The utility model relates to a kind of grinding fluid filter device, especially automatic winding formula grinding fluid circulation filter, water pumps to be fixed on water tank, and filter material is located at the inlet of water tank；Filter tank is mounted on the inlet of tank top, and the bottom in filter tank is communicated with inlet, and the bottom in filter tank is equipped with lower compression roller, and filter tank is provided with float switch；Blowing roller and coiled strip roller are located at the both ends in filter tank, and coiled strip roller is connect with coiled strip motor；Filter material is coiled material, and filter material is inserted on blowing roller, and filter material passes through lower compression roller, and the end of filter material is fixed on coiled strip roller, and lower compression roller is for filter material to be pressed in filter tank；Waste material box is also equipped with below coiled strip roller；Float switch, coiled strip motor and water pump are connect with controller.The device can monitor the service condition of filter material and carry out automatic replacement filter material, can guarantee grinding fluid circulation filter operates normally and can be carried out be filtered for multiple times, filter effect is good, filter material utilization rate is high, filter material replace it is convenient and efficient.
Description
Technical field
The utility model relates to a kind of grinding fluid filter devices, especially automatic winding formula grinding fluid circulation filter.
Background technique
Grinding machine is processed to form the tiny solid granulates of a large amount of diameter, and solid granulates are mixed in grinding fluid, if not in time
Filtering out solid granulates will affect grinding.Existing grinding fluid filter device mostly uses the filter paper of monolithic, needs artificial
Timing is replaced, and worker is easy to forget to replace, and influences processing quality, and artificial replacement efficiency is poor, takes a long time.It is existing
Some filterings mostly use primary filtering, and filter effect is poor, and the service efficiency of grinding fluid is lower.
Utility model content
To solve the above problems, the utility model provides a kind of service condition that can monitor filter material, improves making for filter material
With rate and carrying out replace automatically filter material, can guarantee grinding fluid circulation filter operate normally and can be carried out be filtered for multiple times, mistake
The good automatic winding formula grinding fluid circulation filter of effect is filtered, the specific technical proposal is:
Automatic winding formula grinding fluid circulation filter, including water tank, filter material and water pump, the water pump are fixed on water tank
On, filter material is located at the inlet of water tank；It further include filter tank, float switch, blowing roller, coiled strip roller and coiled strip motor；It is described
Filter tank is mounted on the inlet of tank top, and the bottom in filter tank is communicated with inlet, and the bottom in filter tank is equipped with lower compression roller, filter tank
It is provided with float switch；The blowing roller and coiled strip roller are located at the both ends in filter tank, and coiled strip roller and coiled strip motor connect
It connects；The filter material is coiled material, and filter material is inserted on blowing roller, and filter material passes through lower compression roller, and the end of filter material is fixed on coiled strip roller
On, lower compression roller is for filter material to be pressed in filter tank；Waste material box is also equipped with below the coiled strip roller；The float switch, volume
Material motor and water pump are connect with controller.
By using above-mentioned technical proposal, enter in water tank after the filtering of filter material when grinding fluid enters in filter tank,
Solid granulates in grinding fluid are trapped on filter material, and when the filter residue accumulation on filter material is excessive, the rate of filtration of filter material is slack-off,
Filter material blocking is serious, and the liquid level of the grinding fluid in filter tank constantly increases, and until float switch is triggered, controller controls coiled strip electricity
Machine starting, coiled strip motor drive coiled strip roller to wind filter material, and filter material is extracted from filter tank, and filter residue is taken out of, and filter residue follows
Filter material is mobile and falls in waste material box.After filter material and the replacement of new filter material of blocking, the rate of filtration is promoted rapidly, grinding fluid
Liquid level decline, restore normal circulating filtration.
The control of automatic replacement filter material is realized by float switch and filter tank.
Preferably, the filter tank is provided with the support plate being obliquely installed, and support plate is equipped with through-hole, on through-hole and water tank
Inlet communicates, and support plate one end is located at the side of blowing roller in the bottom in filter tank；The other end of support plate is located at filter tank
Top, and be located at the side of coiled strip roller, support plate is equipped with through-hole, and through-hole communicates with the inlet of water tank.
By using above-mentioned technical proposal, support plate, which is obliquely installed, is obliquely installed filter material also, and filter material is obliquely installed conveniently
Filter residue is taken out of from filter tank.The utilization rate of filter material can also be improved simultaneously because with the raising of grinding fluid liquid level, grinding fluid with
The contact area of filter material becomes larger.
Preferably, secondary filter is housed, secondary filter covers the through-hole in support plate in the support plate.
By using above-mentioned technical proposal, secondary filter increases filtering times, the solid-state being further reduced in grinding fluid
Particle, while secondary filter is avoided that grinding fluid directly flows directly in water tank from the gap in filter material and filter tank.Secondary filtration
The mesh number of net is 50 mesh.
It preferably, further include length-measuring appliance, the length-measuring appliance includes encoder and spring pressure roller, spring pressure
Wheel is fixed on the axis of encoder, and spring pressure roller is pressed on filter material.
By using above-mentioned technical proposal, encoder and spring pressure roller form wheel type electronic meter counter, and spring pressure roller follows
Filter material rotation, to be accurately controlled the amount of switched of filter material, improves the utilization rate of filter material, reduces cost.
Preferably, the coiled strip roller is hollow pipe, and the both ends of coiled strip roller are respectively inserted on driven shaft and driving shaft, from
Moving axis and driving shaft pass through bearing block and are separately fixed on driven carriage and active bracket, driven carriage and active bracket installation
In the two sides of tank top.
By using above-mentioned technical proposal, hollow pipe is stuck on driving shaft and driven shaft, make it is easy for installation, it is easy to disassemble.
Due to the amount of switched using encoder control filter material, there is a phenomenon where coiled strip roller and driving shaft skidding not
Influence the amount of switched of filter material.
Preferably, the end face that the driven shaft and driving shaft are contacted with coiled strip roller is taper；The driven carriage
Both ends are equipped with kidney slot, and driven carriage is fixed on the top of water tank by adjusting formula handle.
By using above-mentioned technical proposal, the diameter of driven shaft and driving shaft is greater than the outer diameter of coiled strip roller, the end of taper
Conveniently block hollow coiled strip roller in portion.
Preferably, the water tank is equipped with magazine slot, and magazine slot position is in the lower section of driven carriage and active bracket, magazine slot
Interior activity is equipped with waste material box.
By using above-mentioned technical proposal, waste material box is convenient for disassembly and assembly, is convenient to clean.
Preferably, the inside of the water tank is equipped with lower clapboard, and water tank is divided into water tank with strainer and clear water tanks by lower clapboard, under every
The height of plate is not higher than the half of water tank depth, and the side of lower clapboard is equipped with three-stage filtration net, and three-stage filtration net is located at filtering
The side of water tank；The inlet is located at the top of water tank with strainer.
By using above-mentioned technical proposal, grinding fluid is after the filtering of filter material, using secondary filtration net filtration, then
Enter water filtering tank from inlet, the solid granulates not filtered out in grinding fluid are deposited in water filtering tank, and are limited to by lower clapboard
In water filtering tank, the grinding fluid in water filtering tank enters in clear water tanks by three-stage filtration net, and three-stage filtration net is 150 mesh, 150 purposes
The more tiny solid granulates of the further filter diameter of filter screen guarantee that the grinding fluid entered in grinding machine meets grinding and requires.
Preferably, liquidometer is also equipped on the water tank, and liquidometer is located at the side of clear water tanks.
By using above-mentioned technical proposal, liquidometer observes the liquid level of the grinding fluid in water tank.Liquidometer is located at clear water tanks
Side be not easy to be contaminated, be able to maintain and clearly observed.
Preferably, the filter material is one of filter cloth, non-woven fabrics or filter paper.
Blowing roller is spring pressing-in type rotary roller, and spring indentation makes the existing mature roller of roller, the both ends dress of roller
Flexible axis, elastic shaft is scalable, easy disassembly.
Compared with prior art the utility model has the following beneficial effects:
Automatic winding formula grinding fluid circulation filter provided by the utility model can monitor the service condition, simultaneously of filter material
Carry out automatic replacement filter material, can guarantee grinding fluid circulation filter operate normally and can be carried out be filtered for multiple times, filter effect
Good, filter material utilization rate is high, filter material replacement is convenient and efficient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of automatic winding formula grinding fluid circulation filter；
Fig. 2 is the top view that automatic winding formula grinding fluid circulation filter does not install filter material；
Fig. 3 is the structural schematic diagram of water tank.
Specific embodiment
Now in conjunction with attached drawing, the utility model is described in further detail.
Embodiment one
As shown in Figure 1 to Figure 3, automatic winding formula grinding fluid circulation filter, including water tank 1, filter material 8 and water pump 14,
Water pump 14 is fixed on water tank 1, and filter material 8 is located at the inlet of water tank 1.Liquidometer 11 and plug 12 are housed on water tank 1.
It further include filter tank 2, float switch 22, blowing roller 3, coiled strip roller 4 and coiled strip motor 48；Filter tank 2 is mounted on water
On the inlet at 1 top of case, the bottom in filter tank 2 is communicated with inlet, and blowing roller 3 and coiled strip roller 4 are located at filter tank 2
Both ends.Coiled strip roller 4 is connect with coiled strip motor 48.
Filter tank 2 is provided with float switch 22 and the support plate 21 that is obliquely installed, 21 one end of support plate in the bottom in filter tank 2,
And it is located at the side of blowing roller 3；The other end of support plate 21 is located at the top in filter tank 2, and is located at the side of coiled strip roller 4,
Support plate 21 is equipped with through-hole, and through-hole is communicated with the inlet of water tank 1.
Lower compression roller 33 is located at the bottom in filter tank 2, and above support plate 21, and lower compression roller 33 is located at the side of blowing roller 3.
Filter material 8 is coiled material, and filter material 8 is inserted on blowing roller 3, and filter material 8 passes through lower compression roller 33, and the end of filter material 8 is fixed on
On coiled strip roller 4, lower compression roller 33 is for filter material 8 to be pressed in filter tank 2；The lower section of coiled strip roller 4 is also equipped with waste material box 9.
The one end in filter tank 2 is equipped with the first roller 32, and the first roller 32 is located at the side of blowing roller 3, and is located at lower compression roller
The other end of 33 top, filter tank 2 is equipped with the second roller 34.
Filter material 8 is stretched out from blowing roller 3, is pressed on the first roller 32, is then passed through lower compression roller 33, is pasted with support plate 21
It closes, then presses against on the second roller 34, be then wound around on coiled strip roller 4.
It further include length-measuring appliance, length-measuring appliance includes encoder 52 and spring pressure roller 51, and spring pressure roller 51 is solid
It is scheduled on the axis of encoder 52, spring pressure roller 51 is pressed on the second roller 34, and filter material 8 is located at spring pressure roller 51 and the second roller
Between 34.Encoder 52 and spring pressure roller 51 form wheel type electronic meter counter, and spring pressure roller 51 follows filter material 8 to rotate, thus smart
The amount of switched of true control filter material 8, improves the utilization rate of filter material 8, reduces cost.
Float switch 22, coiled strip motor 48, encoder 52 and water pump 14 are connect with controller.
Blowing roller 3 is spring pressing-in type rotary roller, and blowing roller 3 is movably arranged on bracket 31.Spring indentation makes roller
For existing mature roller, the both ends of roller are equipped with elastic shaft, and elastic shaft is scalable, easy disassembly.
Filter material 8 is one of filter cloth, non-woven fabrics or filter paper.
The control of automatic replacement filter material 8 is realized by float switch 22 and filter tank 2.
Support plate 21, which is obliquely installed, is obliquely installed filter material 8 also, and filter material 8, which is obliquely installed, facilitates filter residue the band from filter tank 2
Out.The utilization rate of filter material 8 can be also improved simultaneously, because with the raising of grinding fluid liquid level, the contact area of grinding fluid and filter material 8
Become larger.
Enter in water tank 1 after the filtering of filter material 8 when grinding fluid enters in filter tank 2, the solid granulates in grinding fluid
It is trapped on filter material 8, when the filter residue accumulation on filter material 8 is excessive, the rate of filtration of filter material 8 is slack-off, and filter material 8 blocks seriously,
The liquid level of grinding fluid in filter tank 2 constantly increases, and until float switch 22 is triggered, controller controls coiled strip motor 48 and starts,
Coiled strip motor 48 drives coiled strip roller 4 to wind filter material 8, and filter material 8 is extracted from filter tank 2, and filter residue is taken out of, and filter residue follows filter
Material 8 is mobile and falls in waste material box 9, and encoder 52 calculates the length of the replacement of filter material 8, coiled strip motor after reaching setting value
48 stop.When blocking filter material 8 and new filter material 8 replace after, the rate of filtration is promoted rapidly, and the liquid level decline of grinding fluid restores
Normal circulating filtration.
Embodiment two
On the basis of the above embodiments, secondary filter 6 is housed, secondary filter 6 covers support plate in support plate 21
Through-hole on 21.The mesh number of secondary filter 6 is 50 mesh.Secondary filter 6 increases filtering times, is further reduced in grinding fluid
Solid granulates, while secondary filter 6 is avoided that grinding fluid directly flows directly to water tank 1 from the gap in filter material 8 Yu filter tank 2
In.
Coiled strip roller 4 is hollow pipe, and the both ends of coiled strip roller 4 are respectively inserted on driven shaft 42 and driving shaft 41, driven shaft
42 and driving shaft 41 be separately fixed on driven carriage 44 and active bracket 43 by bearing block, driven carriage 44 and actively prop up
Frame 43 is mounted on the two sides at 1 top of water tank.
The end face that driven shaft 42 and driving shaft 41 are contacted with coiled strip roller 4 is taper；The both ends of driven carriage 44 are equipped with
Kidney slot, driven carriage 44 are fixed on the top of water tank 1 by adjusting formula handle 45.
Driven sprocket is housed on driving shaft 41, drive sprocket is housed on coiled strip motor 48, driven sprocket and drive sprocket are logical
Cross chain connection.
Water tank 1 is equipped with magazine slot 13, and magazine slot 13 is located at the lower section of driven carriage 44 and active bracket 43, magazine slot 13
Interior activity is equipped with waste material box 9.Waste material box 9 is convenient for disassembly and assembly, is convenient to clean.
The diameter of driven shaft 42 and driving shaft 41 is greater than the outer diameter of coiled strip roller 4, and the end of taper is conveniently blocked hollow
Coiled strip roller 4.Hollow pipe is stuck on driving shaft 41 and driven shaft 42, make it is easy for installation, it is easy to disassemble.
Due to controlling the amount of switched of filter material 8 using encoder 52, show even if coiled strip roller 4 occurs with what driving shaft 41 skidded
Amount of switched as nor affecting on filter material 8.
Embodiment three
On the basis of above-described embodiment one or embodiment two, as shown in figure 3, the inside of water tank 1 is equipped with lower clapboard 15, under
Water tank 1 is divided into water tank with strainer 17 and clear water tanks 18 by partition 15, and the height of lower clapboard 15 is not higher than the half of 1 depth of water tank, under
The side of partition 15 is equipped with three-stage filtration net 7, and three-stage filtration net 7 is located at the side of water tank with strainer 17；Inlet is located at filtering
The top of water tank 17.
Liquidometer 11 is located at the side of clear water tanks 18.The side that liquidometer 11 is located at clear water tanks 18 is not easy to be contaminated, energy
It is enough to keep clearly being observed.
Grinding fluid filters using secondary filter 6 after the filtering of filter material 8, then enters water filtering tank from inlet
17, the solid granulates not filtered out in grinding fluid are deposited in water filtering tank 17, and are limited in water filtering tank 17 by lower clapboard 15, are filtered
Grinding fluid in water tank 17 enters in clear water tanks 18 by three-stage filtration net 7, and three-stage filtration net 7 is 150 mesh, the filtering of 150 mesh
The more tiny solid granulates of further filter diameter are netted, guarantee that the grinding fluid entered in grinding machine meets grinding and requires.
Claims (10)
1. automatic winding formula grinding fluid circulation filter, including water tank (1), filter material (8) and water pump (14), the water pump (14)
It is fixed on water tank (1), filter material (8) is located at the inlet at the top of water tank (1)；
It is characterized in that, further including filter tank (2), float switch (22), blowing roller (3), coiled strip roller (4) and coiled strip motor
(48)；
The filter tank (2) is mounted on water tank (1) inlet, and the bottom of filter tank (2) is communicated with inlet, the bottom of filter tank (2)
Equipped with lower compression roller (33), filter tank (2) are provided with float switch (22)；
The blowing roller (3) and coiled strip roller (4) are located at the both ends of filter tank (2), coiled strip roller (4) and coiled strip motor
(48) it connects；
The filter material (8) is coiled material, and filter material (8) is inserted on blowing roller (3), and filter material (8) passes through lower compression roller (33), filter material (8)
End be fixed on coiled strip roller (4), lower compression roller (33) is used to for filter material (8) being pressed in filter tank (2)；
Waste material box (9) are also equipped with below the coiled strip roller (4)；
The float switch (22), coiled strip motor (48) and water pump (14) are connect with controller.
2. automatic winding formula grinding fluid circulation filter according to claim 1, which is characterized in that the filter tank (2)
It is provided with the support plate (21) being obliquely installed, one end of support plate (21) is located at blowing roller (3) in the bottom of filter tank (2)
Side；The other end of support plate (21) is located at the top in filter tank (2), and is located at the side of coiled strip roller (4), support plate (21)
It is equipped with through-hole, through-hole is communicated with the inlet of water tank (1).
3. automatic winding formula grinding fluid circulation filter according to claim 2, which is characterized in that the support plate
(21) secondary filter (6) are housed on, secondary filter (6) covers the through-hole on support plate (21).
4. automatic winding formula grinding fluid circulation filter according to claim 1, which is characterized in that further include that length is surveyed
Device is measured, the length-measuring appliance includes encoder (52) and spring pressure roller (51), and spring pressure roller (51) is fixed on encoder
(52) on axis, spring pressure roller (51) is pressed on filter material (8).
5. automatic winding formula grinding fluid circulation filter according to claim 1, which is characterized in that the coiled strip roller
It (4) is hollow pipe, the both ends of coiled strip roller (4) are respectively inserted on driven shaft (42) and driving shaft (41), driven shaft (42) and master
Moving axis (41) is separately fixed on driven carriage (44) and active bracket (43) by bearing block, driven carriage (44) and active
Bracket (43) is mounted on the two sides at the top of water tank (1).
6. automatic winding formula grinding fluid circulation filter according to claim 5, which is characterized in that the driven shaft
(42) and the end face that contacts with coiled strip roller (4) of driving shaft (41) is taper；The both ends of the driven carriage (44) are equipped with waist
Shape hole, driven carriage (44) are fixed on the top of water tank (1) by adjusting formula handle (45).
7. automatic winding formula grinding fluid circulation filter according to claim 5, which is characterized in that the water tank (1)
It is equipped with magazine slot (13), magazine slot (13) is located at the lower section of driven carriage (44) and active bracket (43), and magazine slot (13) is interior
Activity is equipped with waste material box (9).
8. automatic winding formula grinding fluid circulation filter according to claim 1, which is characterized in that the water tank (1)
Inside be equipped with lower clapboard (15), water tank (1) is divided into water tank with strainer (17) and clear water tanks (18), lower clapboard by lower clapboard (15)
(15) height is not higher than the half of water tank (1) depth, and the side of lower clapboard (15) is equipped with three-stage filtration net (7), and three-level mistake
Strainer (7) is located at the side of water tank with strainer (17)；The inlet is located at the top of water tank with strainer (17).
9. automatic winding formula grinding fluid circulation filter according to claim 8, which is characterized in that the water tank (1)
On be also equipped with liquidometer (11), and liquidometer (11) is located at the side of clear water tanks (18).
10. automatic winding formula grinding fluid circulation filter according to claim 1, which is characterized in that the filter material (8)
For one of filter cloth, non-woven fabrics or filter paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821391287.5U CN208726860U (en) | 2018-08-28 | 2018-08-28 | Automatic winding formula grinding fluid circulation filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821391287.5U CN208726860U (en) | 2018-08-28 | 2018-08-28 | Automatic winding formula grinding fluid circulation filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208726860U true CN208726860U (en) | 2019-04-12 |
Family
ID=66031424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821391287.5U Active CN208726860U (en) | 2018-08-28 | 2018-08-28 | Automatic winding formula grinding fluid circulation filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208726860U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760353A (en) * | 2020-07-15 | 2020-10-13 | 靳忠 | Filtering device |
| CN113087269A (en) * | 2021-05-07 | 2021-07-09 | 淄博瀚泓环保科技有限公司 | High-efficient disinfection and sterilization hemodialysis water treatment device |
| CN114939817A (en) * | 2022-06-16 | 2022-08-26 | 秦皇岛市东旭达黏胶制品有限公司 | Metal plate grinding machine |
-
2018
- 2018-08-28 CN CN201821391287.5U patent/CN208726860U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760353A (en) * | 2020-07-15 | 2020-10-13 | 靳忠 | Filtering device |
| CN113087269A (en) * | 2021-05-07 | 2021-07-09 | 淄博瀚泓环保科技有限公司 | High-efficient disinfection and sterilization hemodialysis water treatment device |
| CN114939817A (en) * | 2022-06-16 | 2022-08-26 | 秦皇岛市东旭达黏胶制品有限公司 | Metal plate grinding machine |
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Effective date of registration: 20240326 Address after: 215000, No. 3351 Chengyang Road, Weitang Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee after: SUZHOU GAMMA AUTOMATION TECHNOLOGY Co.,Ltd. Country or region after: China Address before: No. 3366 Chengyang Road, Weitang Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215131 Patentee before: ALFA INTELLIGENT TECHNOLOGY CO.,LTD. Country or region before: China |