CN112691431B - Machining cutting water filter equipment - Google Patents
Machining cutting water filter equipment Download PDFInfo
- Publication number
- CN112691431B CN112691431B CN202011597887.9A CN202011597887A CN112691431B CN 112691431 B CN112691431 B CN 112691431B CN 202011597887 A CN202011597887 A CN 202011597887A CN 112691431 B CN112691431 B CN 112691431B
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- Prior art keywords
- shell
- filter
- rotating shafts
- plate
- bottom plate
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000005520 cutting process Methods 0.000 title claims abstract description 17
- 238000003754 machining Methods 0.000 title claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000002173 cutting fluid Substances 0.000 abstract description 22
- 238000004140 cleaning Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
- B01D33/56—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/36—Supply or regeneration of working media
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention relates to a machining cutting water filtering device, which effectively solves the problems of low filtering speed of cutting fluid, easiness in blockage and frequent replacement of filter cloth. The technical scheme for solving the problem is that the water filter comprises a shell, a water inlet pipe is arranged above the shell, a water outlet pipe is arranged below the shell, a filter body is arranged in the shell, the filter body comprises a top plate which is horizontally arranged, and a bottom plate is arranged below the top plate in parallel; a water inlet is formed in the middle of the top plate, a plurality of first rotating shafts and a plurality of second rotating shafts are uniformly distributed between the top plate and the bottom plate in the circumferential direction, the second rotating shafts are located on the inner sides of the first rotating shafts, and the lower ends of the first rotating shafts penetrate through the bottom plate and are provided with first gears; a vertical filter screen is fixed on each first rotating shaft; the lower end of the second rotating shaft penetrates through the bottom plate and is provided with a second gear; each second rotating shaft is fixedly provided with a vertical baffle plate; the plurality of filter screens and the plurality of baffle plates can form a polygonal enclosure; the invention realizes quick net cleaning, and simultaneously utilizes centrifugal force to improve the filtering effect and the net cleaning efficiency.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a machining cutting water filtering device.
Background
During machining of various machine tools, cutting fluid is required to be used for lubricating and cooling, so that abrasion is reduced, and a cutter and a workpiece are protected. Because cutting waste is generated in the cutting process, the cutting waste has the size according to the cutting process, and generally, the large cutting waste can be directly dropped; however, some fine cutting particles generated in the precision machining process flow into the waste liquid collecting tank along with the washing of the cutting liquid. Because the cutting fluid is used in a large amount, and besides the harm of common oily wastewater, the waste cutting fluid and the waste emulsion are harmful to organisms, and some water-insoluble toxic substances can be dissolved. Therefore, in order to reduce the consumption of the cutting fluid and the generation of sewage, some machine tools use a cutting fluid reflux device to recycle the cutting fluid, and the circulation generally needs to be performed by filtering and cooling steps.
Because the hardness of the particles in the cutting fluid is generally higher and the particle diameter is smaller, the filtering fluid generally needs to be filtered by using a filter cloth or a filter screen with larger meshes, but because the mesh number of the filter cloth is larger, the problems of low filtering speed and easy blockage of the filter cloth are easily caused; therefore, the filter cloth needs to be frequently replaced, which causes inconvenience in use. There is therefore a need to solve the above problems.
Disclosure of Invention
Aiming at the situation, the invention aims to solve the problems in the prior art, and the invention aims to provide a machining cutting water filtering device which can effectively solve the problems of low filtering speed of cutting fluid, easy blockage and frequent replacement of filter cloth.
The technical scheme for solving the problem is that the water purifier comprises a shell, wherein a water inlet pipe is arranged above the shell, a water outlet pipe is arranged below the shell, a filter body is arranged in the shell, and the filter body is driven by a motor to rotate;
the filter body comprises a top plate which is horizontally arranged, and a bottom plate is arranged below the top plate in parallel; the middle part of the top plate is provided with a water inlet, and the water inlet pipe is arranged right above the water inlet; a plurality of first rotating shafts and second rotating shafts are uniformly distributed on the circumference between the top plate and the bottom plate, the second rotating shafts are positioned on the inner sides of the first rotating shafts, and the lower ends of the first rotating shafts penetrate through the bottom plate and are provided with first gears; a vertical filter screen is fixed on each first rotating shaft; the lower end of the second rotating shaft penetrates through the bottom plate and is provided with a second gear; each second rotating shaft is fixedly provided with a vertical baffle plate; the plurality of filter screens and the plurality of baffle plates can form a polygonal enclosure;
an annular box body communicated with the inside of the shell is fixed on the outer edge surface of the shell, a filter plate is arranged at the bottom of the box body, and a channel communicated with the bottom of the box body is arranged on the outer edge surface of the shell; a plurality of vertical electric telescopic rods are fixed on the upper end surface of the shell, the lower ends of the telescopic rods are arranged in the shell and are fixed with annular baffles, and the annular baffles can block the annular box body; the annular baffle moves up and down to enable the first rotating shaft and the second rotating shaft to synchronously and reversely rotate.
The invention realizes rapid net cleaning, and simultaneously utilizes centrifugal force, thereby improving the filtering effect and the net cleaning efficiency; the operation is convenient, and the filter effect is good.
Drawings
Fig. 1 is a front sectional view of the present invention (filter body not cut).
FIG. 2 is a front sectional view of the present invention.
Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.
Fig. 4 is a cross-sectional view taken along line B-B in fig. 2.
Fig. 5 is a state diagram of fig. 4.
Detailed Description
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present invention comprises a casing 1, a water inlet pipe 2 is arranged above the casing 1, a water outlet pipe 3 is arranged below the casing 1, a filter is arranged inside the casing 1, and the filter is driven by a motor 4 to rotate;
the filter body comprises a top plate 5 which is horizontally arranged, and a bottom plate 6 is arranged below the top plate 5 in parallel; a water inlet 7 is formed in the middle of the top plate 5, and the water inlet pipe 2 is arranged right above the water inlet 7; a plurality of first rotating shafts 8 and second rotating shafts 11 are uniformly distributed on the circumference between the top plate 5 and the bottom plate 6, the second rotating shafts 11 are positioned on the inner sides of the first rotating shafts 8, and the lower ends of the first rotating shafts 8 penetrate through the bottom plate 6 and are provided with first gears 9; a vertical filter screen 10 is fixed on each first rotating shaft 8; the lower end of the second rotating shaft 11 penetrates through the bottom plate 6 and is provided with a second gear 12; each second rotating shaft 11 is fixedly provided with a vertical baffle 13; the plurality of filter screens 10 and the plurality of baffle plates 13 can form a polygonal enclosure;
an annular box body 14 communicated with the inside of the shell 1 is fixed on the outer edge surface of the shell 1, a filter plate 15 is arranged at the bottom of the box body 14, and a channel 16 communicated with the bottom of the box body 14 is arranged on the outer edge surface of the shell 1; a plurality of vertical electric telescopic rods 17 are fixed on the upper end surface of the shell 1, the lower ends of the telescopic rods 17 are arranged in the shell 1 and fixed with an annular baffle 18, and the annular baffle 18 can block the annular box body 14; the ring-shaped baffle 18 moves up and down to enable the first rotating shaft 8 and the second rotating shaft 11 to synchronously rotate in opposite directions.
To facilitate the return flow, the outlet pipe 3 is connected to a pump 19.
In order to facilitate the installation of the filter screen 10, the filter screen 10 is composed of an outer frame and filter cloth inside the outer frame, and the middle part of the outer frame is fixed with the first rotating shaft 8.
In order to realize that the annular baffle plate 18 moves up and down to enable the first rotating shaft 8 and the second rotating shaft 11 to synchronously and reversely rotate, a plurality of fixing blocks 20 are uniformly distributed on the circumference of the lower end face of the bottom plate 6, each fixing block 20 is provided with a guide rod 21, the front side face of each guide rod 21 is provided with a first rack 22 meshed with the first gear 9, and the rear side face of each guide rod 21 is provided with a second rack 23 meshed with the second gear 12; the guide rod 21 is sleeved with a spring 24 which can enable the guide rod 21 to return outwards; the outer end of each guide rod 21 is fixed with a spherical bulge; an annular inclined plate 25 inclined towards the middle is arranged at the upper end of the annular baffle 18, and the inclined plate 25 presses the guide rod 21 to move towards the middle after descending along with the annular baffle 18.
In order to realize that motor 4 drives roof 5 and rotates, water inlet 7 in install a plurality of strengthening ribs 26, the middle part of a plurality of strengthening ribs 26 is fixed with the back shaft 27 that runs through the shell 1 top, motor 4 drives back shaft 27 and rotates after slowing down and the switching-over.
In order to avoid impurities between the baffle 18 and the inner side wall of the shell, the baffle 18 is closely contacted with the inner wall of the shell 1.
In order to realize the matching of the filter screens 10 and the baffle plates 13, when the annular baffle plate 18 is positioned at the uppermost part of the stroke, a plurality of the filter screens 10 are in a closed state of mutual contact at the tail ends; the blocking sheets 13 are in a state of not contacting and opening end to end.
When the cutting fluid cutting machine is used, firstly, the motor 4 is started, and the control valve of the water inlet pipe 2 is opened, so that the used cutting fluid enters a position between the bottom plate 6 and the top plate 5 through the water inlet 7.
Along with the rotation of the motor 4, the filter body can be driven to rotate together, namely, the bottom plate 6, the top plate 5 and the filter body at the upper part can be driven to rotate together. While the ring baffle 18, the housing 1 body and the ring box 14 do not rotate.
Since in the initial state, see fig. 2, the ring fence 13 is not lowered by the telescopic motor 17, the ring fence 13 is at the top of its travel, and the ring fence 13 is in a state of blocking the ring box 14. Referring to fig. 4, it can be seen that, in the initial state, the blocking pieces 13 on the plurality of second rotating shafts 11 are in an inclined state, that is, an interval is left between two adjacent blocking pieces 13, and the cutting fluid can pass through the interval and swing outwards; and the filter screens 10 on the first rotating shafts 8 are in a state of mutual contact end to end, that is, the filter screens 10 form a complete enclosure.
At this time, as the cutting fluid containing impurities enters, the cutting fluid is thrown into a polygonal filtering chamber formed by a plurality of filtering screens 10; because the cutting fluid has certain centrifugal force in a high-speed rotating state, the filtering of the cutting fluid can be accelerated under the action of the centrifugal force; so that the cutting fluid is rapidly filtered by the filter screen 10 and the impurities are remained on the inner side surface of the filter screen 10.
The cutting fluid thrown out after filtration is thrown on the inner wall of the annular baffle 18, flows downwards along the inner wall of the shell 1, and is refluxed and cooled through the water outlet pipe 3 and the pump 19.
After a certain time, the filtering effect is reduced, namely the filter screen 10 is blocked; at this time, only two electric telescopic rods 17 need to be started simultaneously, so that the two electric telescopic rods 17 simultaneously push the annular baffle 18 downwards.
When the annular baffle 18 descends, firstly, the annular baffle 18 does not block the annular box body 14, and a small part of cutting fluid enters the annular box body 14; and flows into the interior of the housing 1 through the passage 16 after being filtered by the filter plate 15; when the ring-shaped baffle 18 is further lowered, the sloping plate 25 on the upper end surface of the ring-shaped baffle 18 presses the spherical protrusions on the outer ends of the guide rods 21, and the plurality of guide rods 21 are moved toward the middle at the same time.
When the guide rod 21 moves towards the middle, the first rack 22 and the second rack 23 drive the first rotating shaft 8 and the second rotating shaft 11 to rotate simultaneously, and the rotating directions of the first rotating shaft and the second rotating shaft are opposite; thus, referring to fig. 5, the plurality of baffle plates 13 are contacted end to form an area with an upward opening, and the cutting fluid entering through the water inlet pipe 2 is temporarily isolated in the middle area without being filtered. In a similar way, the plurality of filter screens 10 can rotate, a space can be generated between two adjacent filter screens 10 at the moment, and along with the driving of the motor 4, sundries attached to the filter screens 10 can be thrown outwards under the throwing action of centrifugal force and are accepted by the reversing box body 14, so that the sundries can enter the annular box body 14.
Impurities and a part of cutting fluid enter the annular box body 14 and then are slowly filtered by the filter plate 15 at the bottom of the annular box body 14.
Later on, the electric telescopic rod 17 is reset, the whole device can be restored to the initial state again, impurities are thrown through the inclination of the filter screen 10, the filter screen 10 can be restored to the dredging state again, and subsequent continuous quick filtration is facilitated. Meanwhile, due to the action of the inclined plate 25, the inclined plate 25 can scrape the impurities remained in the shell 1, so that the impurities slowly flow into the annular box body 14 along the inclined plate 25.
The device supports the filter screens 10 by using the first rotating shafts 8, and the plurality of filter screens 10 can be closed and opened by rotating the first rotating shafts 8; meanwhile, the opened filter screen 10 can be inclined, so that sundries attached to the filter screen 10 can be thrown off smoothly.
The device utilizes the up-and-down movement of the annular baffle 18 to switch the filtration and the net cleaning; by moving the ring-shaped baffle 18 downwards, the cutting fluid is isolated by a plurality of baffle plates 13 during cleaning; on the other hand, the sundries can be thrown into the annular box body 14 through the lifting of the annular box body 14.
This device ingenious design inside separation blade 13 and the filter screen 10 in the outside, make state between them opposite, cut through the downstream, realized filtering and clear net, the cooperation is ingenious, and the effect is showing, has realized automatic clear net.
The device can realize quick net cleaning, and simultaneously improves the filtering effect and the net cleaning efficiency by utilizing centrifugal filtration; the operation is convenient, and the filter effect is good.
Claims (7)
1. A machining cutting water filtering device comprises a shell (1), and is characterized in that a water inlet pipe (2) is arranged above the shell (1), a water outlet pipe (3) is arranged below the shell, a filtering body is arranged inside the shell (1), and the filtering body is driven by a motor (4) to rotate;
the filter body comprises a top plate (5) which is horizontally arranged, and a bottom plate (6) is arranged below the top plate (5) in parallel; a water inlet (7) is formed in the middle of the top plate (5), and the water inlet pipe (2) is arranged right above the water inlet (7); a plurality of first rotating shafts (8) and second rotating shafts (11) are uniformly distributed on the circumference between the top plate (5) and the bottom plate (6), the second rotating shafts (11) are positioned on the inner sides of the first rotating shafts (8), and the lower ends of the first rotating shafts (8) penetrate through the bottom plate (6) and are provided with first gears (9); a vertical filter screen (10) is fixed on each first rotating shaft (8); the lower end of the second rotating shaft (11) penetrates through the bottom plate (6) and is provided with a second gear (12); each second rotating shaft (11) is fixedly provided with a vertical baffle plate (13); the plurality of filter screens (10) and the plurality of baffle plates (13) can form a polygonal enclosure;
an annular box body (14) communicated with the inside of the shell (1) is fixed on the outer edge surface of the shell (1), a filter plate (15) is arranged at the bottom of the box body (14), and a channel (16) communicated with the bottom of the box body (14) is arranged on the outer edge surface of the shell (1); a plurality of vertical electric telescopic rods (17) are fixed on the upper end surface of the shell (1), the lower ends of the telescopic rods (17) are arranged in the shell (1) and are fixed with annular baffles (18), and the annular baffles (18) can block the annular box body (14); the annular baffle (18) moves up and down to enable the first rotating shaft (8) and the second rotating shaft (11) to synchronously rotate in opposite directions.
2. A machine-cut water filter device according to claim 1, characterised in that the outlet pipe (3) is connected to a pump (19).
3. A machine-cut water filter unit as claimed in claim 1, wherein said filter screen (10) consists of an outer frame and a filter cloth inside the outer frame, the middle part of the outer frame being fixed to the first rotary shaft (8).
4. The machine-cutting water filtering device as claimed in claim 1, wherein a plurality of fixing blocks (20) are uniformly distributed on the circumference of the lower end face of the bottom plate (6), each fixing block (20) is provided with a guide rod (21), a first rack (22) meshed with the first gear (9) is arranged on the front side face of each guide rod (21), and a second rack (23) meshed with the second gear (12) is arranged on the rear side face of each guide rod (21); the guide rod (21) is sleeved with a spring (24) which can enable the guide rod (21) to reset outwards; the outer end of each guide rod (21) is fixed with a spherical bulge; the upper end of the annular baffle (18) is provided with an annular inclined plate (25) inclined towards the middle, and the inclined plate (25) can extrude the guide rod (21) to move towards the middle after descending along with the annular baffle (18).
5. The machine-cutting water filtering device as claimed in claim 1, wherein a plurality of reinforcing ribs (26) are installed in the water inlet (7), a supporting shaft (27) penetrating through the top of the housing (1) is fixed in the middle of the plurality of reinforcing ribs (26), and the motor (4) drives the supporting shaft (27) to rotate after speed reduction and reversing.
6. A machine-cut water filter device according to claim 1, wherein said baffle (18) is in close contact with the inner wall of the housing (1).
7. A machine-cutting water filtration device as claimed in claim 1, wherein when a plurality of said filter screens (10) are in a closed condition in end-to-end contact with one another; at the moment, the blocking pieces (13) are in a state of not contacting and opening end to end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597887.9A CN112691431B (en) | 2020-12-30 | 2020-12-30 | Machining cutting water filter equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597887.9A CN112691431B (en) | 2020-12-30 | 2020-12-30 | Machining cutting water filter equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112691431A CN112691431A (en) | 2021-04-23 |
| CN112691431B true CN112691431B (en) | 2022-05-03 |
Family
ID=75512057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011597887.9A Active CN112691431B (en) | 2020-12-30 | 2020-12-30 | Machining cutting water filter equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112691431B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117018750B (en) * | 2023-10-07 | 2024-01-09 | 西安巨浪精密机械有限公司 | Chip liquid iron fillings splitter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201928961U (en) * | 2010-12-30 | 2011-08-17 | 青岛顺昌食品有限公司 | Cleaning and impurities-removing device of fruits and vegetables |
| CN207805184U (en) * | 2018-01-04 | 2018-09-04 | 宁夏吴忠市精艺裘皮制品有限公司 | It is a kind of to produce the waste water filtering used in suede discharge waste water treatment system |
| CN109876510B (en) * | 2019-03-26 | 2019-09-24 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | The separator of cuttings liquid in a kind of iron filings |
| CN110368735B (en) * | 2019-08-06 | 2022-02-18 | 广东德通水务有限公司 | Be applied to sewage treatment's mechanical equipment |
| CN211072806U (en) * | 2019-09-17 | 2020-07-24 | 江苏慧泰科环境工程技术研究院有限公司 | Cutting fluid recovery unit of lathe |
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2020
- 2020-12-30 CN CN202011597887.9A patent/CN112691431B/en active Active
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| Publication number | Publication date |
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| CN112691431A (en) | 2021-04-23 |
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Inventor after: Jin Gang Inventor after: Li Wenshuo Inventor after: Jiang Haotian Inventor after: Li Zhanjie Inventor after: Wang Zhiqiang Inventor after: Wang Zhujie Inventor before: Li Zhanjie Inventor before: Li Wenshuo Inventor before: Jiang Haotian Inventor before: Jin Gang Inventor before: Wang Zhiqiang Inventor before: Wang Zhujie |
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Effective date of registration: 20231129 Address after: No.52 Chang'an North Road, Beilin District, Xi'an City, Shaanxi Province, 710000, No. 69, 9th Row, Zhonggong Electronics Market Patentee after: Xi'an Junlin Electronic Technology Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20231129 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: No. 1310 Dagu South Road, Jinnan District, Tianjin Patentee before: TIANJIN University OF TECHNOLOGY AND EDUCATION (CHINA VOCATIONAL TRAINING INSTRUCTOR TRAINING CENTER) |