CN111321288B - A double-row slab blank centering device - Google Patents
A double-row slab blank centering device Download PDFInfo
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- CN111321288B CN111321288B CN202010249017.6A CN202010249017A CN111321288B CN 111321288 B CN111321288 B CN 111321288B CN 202010249017 A CN202010249017 A CN 202010249017A CN 111321288 B CN111321288 B CN 111321288B
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- 238000000034 method Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract 1
- 241001417935 Platycephalidae Species 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/70—Furnaces for ingots, i.e. soaking pits
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Attitude Control For Articles On Conveyors (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
本发明公开一种双排板坯坯料对中装置，包括小车、推板、轨道、中间摆轴液压缸、支座、底座。本发明采用采用液压方式进行对中，适用于的不同尺寸、厚度的板坯坯料对中，设备维护简单方便。
The invention discloses a double-row slab blank centering device, comprising a trolley, a push plate, a track, an intermediate swing shaft hydraulic cylinder, a support, and a base. The invention adopts a hydraulic method for centering, is suitable for centering slab blanks of different sizes and thicknesses, and the equipment maintenance is simple and convenient.
Description
Technical Field
The invention relates to the technical field of slabs, in particular to a device for centering double-row slab blanks.
Background
At present, a single-row plate blank is generally adopted for charging in a domestic plate blank charging heating furnace, and in order to improve the yield of the heating furnace, a double-row charging mode is adopted, so that problems are brought to the charging mode, and the phenomenon of deviation occurs in the transportation process before two rows of plate blanks are charged into the heating furnace. Therefore, two rows of blanks need to be centered, and research and development of a device for centering double rows of blanks is a problem to be solved.
Disclosure of Invention
Aiming at the problems, the invention provides the double-row slab blank centering device which adopts a hydraulic mode to drive the trolley to drive the push plate to perform centering, and the mode is simple and easy to maintain and overhaul.
In order to achieve the aim, the double-row slab blank centering device and the double-row slab blank centering method comprise a plurality of bases fixed on a roller way frame, wherein the bases are correspondingly arranged on two sides of the central line of a conveying roller way; the two trolleys are respectively positioned at two sides of the central line of the conveying roller way and freely move in the tracks, and the trolleys at the same side are connected into a whole through a push plate;
the rail is provided with an intermediate pendulum shaft hydraulic cylinder which is used for driving the small sides at two sides to move along the rail in opposite directions.
Further, the lifting beam assembly, the swing arm system and the driving system are sequentially arranged from top to bottom; the driving system is used for driving the lifting beam assembly to do lifting motion by driving the swing arm system;
The lifting beam assembly comprises a plurality of supports, a plurality of lifting beams and a plurality of lifting beams, wherein the supports are fixed on a side frame of a conveying roller way;
A group of cross beams are hinged to each support, and a plurality of rollers are hinged to the upper part of each group of cross beams in sequence;
and connecting beams are fixed at the lower parts of the plurality of groups of cross beams.
The swing arm system is arranged below the connecting beam and comprises a base, a swing arm is hinged to the base through a bearing seat, a guide wheel is hinged to the free end of the swing arm through an ear hole, and the outer contour of the guide wheel is in contact with the lower surface of the connecting beam.
Further, the driving system comprises a tail swing shaft hydraulic cylinder and a hydraulic cylinder seat, a flat head of the tail swing shaft hydraulic cylinder positioned on the left side of the central line of the lifting device is hinged to the other ear hole of the side swing arm, the tail of the side tail swing shaft hydraulic cylinder is hinged to the side hydraulic cylinder seat, a flat head of the tail swing shaft hydraulic cylinder positioned on the right side of the central line of the lifting device is hinged to the other ear hole of the side swing arm, and the tail of the side tail swing shaft hydraulic cylinder is hinged to the side hydraulic cylinder seat.
The centering process of the double-row slab blank centering device provided by the invention is as follows: firstly, two rows of slabs are stopped on a conveying roller way, a beam in a lifting device is stopped at a position D and below the roller surface of the conveying roller way, a pushing head E is stopped at a position 1, a pushing head F is stopped at a position 3, lifting check heads fixed on four groups of rails are lifted, then the beams in the lifting device are driven to lift, the two rows of slabs can move to one side along beam rollers hinged on the beams in the lifting process, under the stop actions of the pushing head E, the pushing head F and the lifting check heads, one slab can only move between the pushing head E and the lifting check heads, the other slab can move between the pushing head F and the lifting check heads, when the beam in the lifting device is lifted from the position D to the position C, piston rods of a first group of intermediate swing shaft hydraulic cylinders and a third group of intermediate swing shaft hydraulic cylinders are driven to retract, the piston rods drive a first group of trolley and a third group of trolley to move towards the lifting check heads, until the push head E contacts one side surface of the slab, the piston rods of the first and third groups of intermediate pendulum shaft hydraulic cylinders are continuously driven to retract, the piston rods continuously drive the push head E to push the slab to move towards the lifting stop head, until the other side surface of the slab blank contacts the lifting stop head, the push head E moves from the position 1 to the position 2, the piston rods of the first and third groups of intermediate pendulum shaft hydraulic cylinders are stopped at the moment, the process can control the actions of the intermediate pendulum shaft hydraulic cylinders and maintain pressure by detecting pressure sensor signals on a hydraulic pipeline through a control system, the synchronization of the first and third groups of intermediate pendulum shaft hydraulic cylinders is realized by means of synchronous motors on the hydraulic pipeline, the action process of the second and fourth groups of intermediate pendulum shaft hydraulic cylinders which are synchronously carried out with the process is as follows, the piston rods of the second and fourth groups of intermediate pendulum shaft hydraulic cylinders are driven to retract, the piston rod drives the second and fourth groups of trolleys to move towards the lifting stop head until the push head F contacts one side surface of the slab, the piston rod of the second and fourth groups of intermediate swing shaft hydraulic cylinders is continuously driven to retract, the piston rod continuously drives the push head F to push the slab to move towards the lifting stop head until the other side surface of the slab blank contacts the lifting stop head, the push head F moves from the position 3 to the position 4, at the moment, the piston rod actions of the second and fourth groups of intermediate swing shaft hydraulic cylinders are stopped, the action of the intermediate swing shaft hydraulic cylinders can be controlled and maintained by detecting the pressure sensor signals on the hydraulic pipeline through the control system, the cross beam in the lifting device is driven to descend, the push head E, the push head F and the piston rods of the lifting stop head are driven to fall on the conveying roller way under the action of the dead weight, the push head E and the piston rods of the first and third groups of intermediate swing shaft hydraulic cylinders are driven to stretch out, the push head E moves towards the direction deviating from the lifting stop head, the piston rods of the first and third groups of intermediate swing shaft hydraulic cylinders are simultaneously returned to the position 1 by the position 2, the push head E and the second and fourth groups of intermediate swing shaft hydraulic cylinders stretch out from the position 5 to the position 5 when the whole piston rods of the first and third groups of intermediate swing shaft hydraulic cylinders stretch out. And then driving a conveying roller way to convey the two rows of plate blanks to the front of a heating furnace door. The continuous slab centering can be realized by repeating the above actions repeatedly, and the device is simple to maintain and convenient to overhaul.
Drawings
FIG. 1 is a front view of a lifting device in an embodiment of an auxiliary double row slab blank centering device of the present invention;
FIG. 2 is a top view of a lifting device in an embodiment of an auxiliary double row slab blank centering device of the present invention;
FIG. 3 is a cross-sectional view of A-A of a lifting device in an embodiment of an auxiliary double row blank centering device of the present invention;
FIG. 4 is a B-B cross-sectional view of a lifting device in an embodiment of an auxiliary double row slab blank centering device of the present invention;
FIG. 5 is a left side view of the center of the lifting device in an embodiment of the auxiliary double row blank centering device of the present invention;
FIG. 6 is a front view of an embodiment of the lifting device of the present invention;
FIG. 7 is a top view of an embodiment of the lifting device of the present invention;
FIG. 8 is a left side view of an embodiment of the lifting device of the present invention;
FIG. 9 is a right side view of an embodiment of the lifting device of the present invention;
Detailed Description
The invention is further described below with reference to the drawings.
Example 1
As shown in figures 1-5, the double-row slab blank centering device and method provided by the invention comprise a trolley 1, a push plate 2, a rail 3, a middle pendulum shaft hydraulic cylinder 4, a support 5 and a base 6.
Eight groups of bases 6 are arranged along the direction of the central line of the conveying roller way, four groups of bases 6 are respectively arranged on two sides of the central line of the conveying roller way, the bases 6 are fixed on a roller way frame, four groups of tracks 3 are arranged along the direction of the central line of the conveying roller way, each group of tracks 3 is fixed on the bases 6 which are correspondingly positioned on two sides of the central line of the conveying roller way and correspond to the group of tracks 3, two trolleys 1 are arranged on each group of tracks 3, the trolleys 1 are respectively positioned on two sides of the central line of the conveying roller way for each group of tracks 3, and the trolleys freely move in the tracks 3 as shown in figures 1, 2, 3 and 4.
The two groups of pushing plates 2 are respectively arranged on two sides of the central line of the conveying roller way, one side of the pushing plate 2 positioned on the central line of the conveying roller way is fixed on the four groups of trolleys 1 on the side, and the other side of the pushing plate 2 positioned on the central line of the conveying roller way is fixed on the four groups of trolleys 1 on the side as shown in figures 2,3 and 4.
Four groups of intermediate pendulum shaft hydraulic cylinders 4 are arranged along the central line direction of a conveying roller way, the flat heads of the first group of intermediate pendulum shaft hydraulic cylinders 4 are positioned on one side, namely the side B, of the central line of the conveying roller way, the flat heads of the second group of intermediate pendulum shaft hydraulic cylinders 4 are positioned on the other side, namely the side A, of the central line of the conveying roller way, the four groups of support seats 5 are arranged along the central line direction of the conveying roller way and are respectively fixed below the four groups of rails 3, the flat heads of the first group of intermediate pendulum shaft hydraulic cylinders 4 are hinged to the lug holes of the lower part of the trolley 1 clamped on the side B of the first group of rails 3, the flat heads of the first group of intermediate pendulum shaft hydraulic cylinders 4 are hinged to the support seat 5 fixed below the first group of the trolley 1, the flat heads of the third group of intermediate pendulum shaft hydraulic cylinders 4 are hinged to the lower part of the fourth group of rails 3, the flat heads of the third group of intermediate pendulum shaft hydraulic cylinders 4 are hinged to the support seats 5 fixed below the fourth group of rails 3 (the flat heads are hinged to the fourth group of rails 2, the fourth group of intermediate pendulum shaft hydraulic cylinders 4 are hinged to the lower than the fourth group of rails 3, and the fourth group of intermediate pendulum shaft hydraulic cylinders 4 are hinged to the fourth group of rails 2 is hinged to the lower than the fourth group of the fourth heads of rails 1, and the fourth group of intermediate pendulum shaft hydraulic cylinders 4 is hinged to the fourth group of the fourth heads is hinged to the lower than the fourth heads of the fourth group of the flat heads of the fourth heads of the trolley 1 is hinged to the fourth lower than the fourth heads of the fourth group of the fourth heads is hinged to the fourth lower than the fourth bottom the fourth group of the trolley 1 is positioned below the bottom the fourth bottom the bottom is arranged 4.
Example 2
On the basis of the embodiment, the whole centering process of the double-row slab blank centering device comprises the following steps of firstly stopping two rows of slabs on a conveying roller way, stopping a beam in a lifting device at a position D below the roller surface of the conveying roller way, stopping a pushing head E at a position 1, stopping a pushing head F at a position 3, lifting a lifting baffle head fixed on four groups of rails 3, then driving the beam in the lifting device to lift, moving two rows of slabs to one side along a beam roller hinged on the beam in the lifting process, moving one slab between the pushing head E, the pushing head F and the lifting baffle head under the stopping action of the pushing head, wherein one slab can only move between the pushing head E and the lifting baffle head, and the other slab can move between the pushing head F and the lifting baffle head, when the beam in the lifting device lifts up from the position D to the position C, driving piston rods of a first group of a middle swing shaft hydraulic cylinder 4, driving the piston rods of the first group of the lifting baffle head 1 to move in the direction until the pushing head E contacts one side of the slab, continuously driving the middle shaft 4 to move along the first group of the piston rod 4, and synchronously driving the piston rods of the middle shaft 4 to move synchronously until the piston rods of the first group of the middle swing shaft 4 and the piston rod 4 move synchronously move towards the first swing shaft 4 and the piston rod of the lifting cylinder 2 are stopped by the piston rod of the middle hydraulic system when the piston rod of the middle piston rod 4 is synchronously moves, the piston rods of the second and fourth groups of intermediate pendulum shaft hydraulic cylinders 4 are driven to retract, the piston rods drive the second and fourth groups of trolleys 1 to move towards the lifting baffle heads until the push heads F contact one side surface of the slab, the piston rods of the second and fourth groups of intermediate pendulum shaft hydraulic cylinders 4 are continuously driven to retract, the piston rods continuously drive the push heads F to push the slab to move towards the lifting baffle heads until the other side surface of the slab blank contacts the lifting baffle heads, the push heads F move from the position 3 to the position 4, at the moment, the piston rods of the second and fourth groups of intermediate pendulum shaft hydraulic cylinders 4 are stopped, the process can control the actions of the intermediate pendulum shaft hydraulic cylinders 4 and keep pressure by detecting pressure sensor signals on a hydraulic pipeline through a control system, then the cross beam in the lifting device is driven to descend, under the stop action of the push heads E, the push heads F and the lifting baffle heads, the piston rods of the first and third groups of intermediate pendulum shaft hydraulic cylinders 4 are driven to extend towards the lifting baffle heads under the self-weight action, the push heads E move away from the lifting baffle heads, and the piston rods of the first and the third groups of intermediate pendulum shaft hydraulic cylinders 4 are driven to extend from the piston rods E, and the piston rods of the second and fourth groups of intermediate pendulum shaft hydraulic cylinders 4 are driven to extend from the position 2 to the position 4, and all the piston rods 4 extend from the second piston rods 4 to the position 4 are simultaneously completely, and the whole process is completed when the piston rods are completely extended from the piston rods 4 to the piston rods 4 and extend from the second piston rods to the middle shaft hydraulic cylinder 4. And then driving a conveying roller way to convey the two rows of plate blanks to the front of a heating furnace door.
Example 3
As shown in fig. 6-9, the lifting device for assisting in centering of double-row slab blanks comprises a lifting beam assembly, a swing arm system and a driving system.
The lifting beam assembly comprises three groups of supports A4, cross beams A1, rollers A2 and connecting beams A3, wherein the cross beams A1 are arranged along the central line of a conveying roller way, the supports A4 are arranged along the central line of the conveying roller way, the three groups of supports A4 are fixed on a side frame of the conveying roller way, one end of each group of cross beams A1 is hinged to the corresponding support A4 of the corresponding cross beam A1, 8 rollers A2 are hinged to the upper part of each group of cross beams A1 in sequence, and the connecting beams A3 are fixed on the lower parts of the three groups of cross beams A1 to form a frame structure as shown in figures 7 and 8.
The swing arm A7 system comprises a bearing seat A6, a base A5, a swing arm A7 and a guide wheel A8, wherein the swing arm 7 positioned on the left side of the center line of the lifting device is hinged on the side bearing seat A6, the side bearing seat A6 is fixed on the side base A5, the side guide wheel A8 is hinged on one lug hole of the side swing arm A7, the outer contour of the side guide wheel A8 is contacted with the lower surface of the connecting beam A3, the swing arm 7 positioned on the right side of the center line of the lifting device is hinged on the side bearing seat A6, the side bearing seat A6 is fixed on the side base A5, the side guide wheel A8 is hinged on one lug hole of the side swing arm A7, and the outer contour of the side guide wheel 8 is contacted with the lower surface of the connecting beam A3 as shown in fig. 6 and 7.
The driving system comprises a tail swing shaft hydraulic cylinder A10 and a hydraulic cylinder seat A9, a flat head of the tail swing shaft hydraulic cylinder A10 positioned on the left side of the central line of the lifting device is hinged to the other lug hole of the side swing arm A7, the tail of the side tail swing shaft hydraulic cylinder A10 is hinged to the side hydraulic cylinder seat A9, a flat head of the tail swing shaft hydraulic cylinder A10 positioned on the right side of the central line of the lifting device is hinged to the other lug hole of the side swing arm A7, and the tail of the side tail swing shaft hydraulic cylinder A10 is hinged to the side hydraulic cylinder seat A9 as shown in figures 6 and 7.
The whole lifting process of the lifting device comprises the following steps of firstly stopping two rows of slabs on a conveying roller way, fully retracting piston rods of two groups of tail rocker shaft hydraulic cylinders A10, stopping a beam A1 at the position A and below the roller surface of the conveying roller way, then lifting baffle heads fixed on a centering device, driving piston rods of the two groups of tail rocker shaft hydraulic cylinders A10 to extend, driving the two groups of swing arms A7 to simultaneously rotate anticlockwise around respective connecting centers, driving guide wheels A8 hinged to the two groups of swing arms A7 to simultaneously drive a connecting beam A3 and three groups of beams A1 to rotate clockwise around respective hinging centers of the three groups of beams A1, gradually contacting rolling wheels A2 fixed on the three groups of beams A1 with the slabs in the lifting process of the three groups of beams A1, and blocking the two rows of slabs to one side due to the rotation of the rolling wheels A2 around the rotation centers of the rolling wheels A1, and under the action of push plates and the lifting baffle heads positioned on two sides of the conveying roller way, and stopping the two rows of slabs when the two groups of tail rocker shaft hydraulic cylinders A10 extend to the position of the three groups of beams A1 to reach the position B when the three groups of beams A1 are completely separated from the roller way. And then the push plates on two sides of the conveying roller way are driven to center the two rows of slabs by taking the lifting baffle heads as a reference, as shown in fig. 4, then the piston rods of the two groups of tail swing shaft hydraulic cylinders A10 are driven to retract, the three groups of cross beams A1 and the connecting beams A3 rotate anticlockwise around respective hinging centers under the action of dead weight and dead weight of the two rows of slabs, the two groups of swing arms A7 rotate clockwise around respective hinging centers, and the two groups of guide wheels 8 roll along the lower parts contacted with the connecting beams A3. Under the stop effect of the push plates and the lifting stop heads which are positioned on two sides of the conveying roller way, the two rows of slabs can not move along the roller A2, so that the slab centering effect is ensured. When the piston rods of the two groups of tail swing axle hydraulic cylinders A10 are fully retracted, the three groups of cross beams A1 return to the position A from the position B, and the lifting-lowering process is fully completed.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.
Claims (2)
1. The double-row slab blank centering device is characterized by comprising a plurality of bases fixed on a roller way frame, wherein the bases are correspondingly arranged at two sides of the central line of a conveying roller way, a group of rails are erected on the two opposite bases, each group of rails is fixed in the conveying roller way corresponding to the group of rails, and two trolleys are arranged on each group of rails, are respectively positioned at two sides of the central line of the conveying roller way and freely move in the rails, and are connected into a whole through a push plate;
The rail is provided with a middle pendulum shaft hydraulic cylinder which is used for driving the trolleys at two sides to move along the rail in opposite directions.
2. The double-row slab blank centering device of claim 1, further comprising a lifting beam assembly, a swing arm system and a driving system which are sequentially arranged from top to bottom, wherein the driving system is used for driving the lifting beam assembly to do lifting motion by driving the swing arm system;
The lifting beam assembly comprises a plurality of supports, a plurality of lifting beams and a plurality of lifting beams, wherein the supports are fixed on a side frame of a conveying roller way;
A group of cross beams are hinged to each support, and a plurality of rollers are hinged to the upper part of each group of cross beams in sequence;
A connecting beam is fixed at the lower part of the plurality of groups of cross beams;
The swing arm system is arranged below the connecting beam and comprises a base, a swing arm is hinged to the base through a bearing seat, a guide wheel is hinged to the free end of the swing arm through an earhole, and the outer contour of the guide wheel is in contact with the lower surface of the connecting beam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010249017.6A CN111321288B (en) | 2020-03-31 | 2020-03-31 | A double-row slab blank centering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010249017.6A CN111321288B (en) | 2020-03-31 | 2020-03-31 | A double-row slab blank centering device |
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| Publication Number | Publication Date |
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| CN111321288A CN111321288A (en) | 2020-06-23 |
| CN111321288B true CN111321288B (en) | 2024-12-13 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211876752U (en) * | 2020-03-31 | 2020-11-06 | 中冶华天工程技术有限公司 | Lifting device for supplementary double slab blank centering |
| CN212025416U (en) * | 2020-03-31 | 2020-11-27 | 中冶华天工程技术有限公司 | A double-row slab blank centering device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2200026C3 (en) * | 1972-01-03 | 1975-02-13 | Helmut 6200 Wiesbaden Heuss | Walking beam furnace for heating material in an upright position |
| JP2010265536A (en) * | 2009-05-18 | 2010-11-25 | Nippon Steel Corp | Heating furnace and heating method |
| CN101966568B (en) * | 2010-11-26 | 2012-04-11 | 中冶赛迪工程技术股份有限公司 | Casting blank transverse moving mechanism |
| CN203900115U (en) * | 2014-05-13 | 2014-10-29 | 武汉钢铁(集团)公司 | Strip steel centering set with side guide rolls |
| CN106555048B (en) * | 2015-09-24 | 2018-04-27 | 宝山钢铁股份有限公司 | A kind of high accuracy heating furnace takes out steel position control method |
| CN209166076U (en) * | 2018-11-16 | 2019-07-26 | 法孚斯坦因冶金技术（上海）有限公司 | Middle baffle device in furnace |
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2020
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211876752U (en) * | 2020-03-31 | 2020-11-06 | 中冶华天工程技术有限公司 | Lifting device for supplementary double slab blank centering |
| CN212025416U (en) * | 2020-03-31 | 2020-11-27 | 中冶华天工程技术有限公司 | A double-row slab blank centering device |
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Effective date of registration: 20241108 Address after: 243000 Fu Chang Industrial Park, 259 HSI Nan Road, Ma'anshan economic and Technological Development Zone, Anhui Applicant after: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Country or region after: China Applicant after: HUATIAN NANJING ENGINEERING & TECHNOLOGY CORPORATION, MCC Address before: No.699, Hunan West Road, Ma'anshan City, Anhui Province Applicant before: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Country or region before: China |
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