CN109209261B - Novel automatic chuck - Google Patents
Novel automatic chuck Download PDFInfo
- Publication number
- CN109209261B CN109209261B CN201811127651.1A CN201811127651A CN109209261B CN 109209261 B CN109209261 B CN 109209261B CN 201811127651 A CN201811127651 A CN 201811127651A CN 109209261 B CN109209261 B CN 109209261B
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- face
- gear
- chuck
- speed regulating
- boss
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 72
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 210000000078 claw Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gripping On Spindles (AREA)
- Transmission Devices (AREA)
Abstract
The invention provides a novel automatic chuck, which belongs to the technical field of chucks of drilling machines and comprises a box body, a power gear, a speed regulating gear, a chuck rack, a wire coiling, a clamping jaw, a power source for respectively providing rotating power for the power gear and the speed regulating gear and a transmission gear for respectively transmitting torque for the power gear and the speed regulating gear; the power gear and the speed regulating gear are respectively and rotatably arranged in the box body; the chuck frame is positioned between the power gear and the speed regulating gear, at least three jaw grooves are uniformly arranged on the first end surface along the circumferential direction, and a chuck frame boss is arranged on the second end surface along the inner edge; the wire coil is rotatably sleeved outside the lug boss of the chuck frame, a spiral groove is arranged on the first end surface, and the second end surface is fixedly connected with the speed regulating gear; the jack catch is arranged in the jack catch groove in a sliding mode, and the side face, facing the wire coiling, of the jack catch is provided with jack catch teeth meshed with the spiral groove of the wire coiling. The chuck is arranged in front of the power head of the drilling machine, and when a drill rod is connected, the power head of the drilling machine does not need to be stopped.
Description
Technical Field
The invention relates to the technical field of drill chucks, in particular to a novel automatic chuck.
Background
At present, when a plurality of drilling machines are connected with a next drill rod in the drilling process, a static connection method is adopted, and the drilling machine which has drilled into a coal seam needs to stop rotating, mainly because the existing drilling machine adopts a clamp holder mode, only plays the roles of fixing and limiting the drill rod and cannot drive the drill rod to rotate. The drilling tool part which has drilled the coal seam is frequently started and stopped, the collapse of the drilled coal hole wall is easily caused by the impact in the starting and stopping process, the drilling tool is locked and cannot be started, and the drilling tool is broken, lost, drilled holes cannot be used and other safety accidents are caused in serious cases.
Disclosure of Invention
The invention aims to provide a novel automatic chuck which is arranged in front of a power head of a drilling machine, and the power head of the drilling machine does not need to be stopped when a drill rod is connected.
In order to achieve the purpose, the invention provides a novel automatic chuck which is arranged in front of a power head of a drilling machine and comprises a box body, a power gear, a speed regulating gear, a chuck rack, a wire coiling, a clamping jaw, a power source for respectively providing rotating power for the power gear and the speed regulating gear and a transmission gear for respectively transmitting torque for the power gear and the speed regulating gear; the power gear, the speed regulating gear, the chuck frame and the wire coil are all in annular structures, and the circle centers of the power gear, the speed regulating gear, the chuck frame and the wire coil are collinear; the power gear and the speed regulating gear are respectively and rotatably arranged in the box body; the chuck frame is positioned between the power gear and the speed regulating gear, the circular end surface fixedly connected with the power gear is a first end surface, the circular end surface opposite to the first end surface is a second end surface, at least three chuck jaw grooves are uniformly arranged on the first end surface along the circumferential direction, and a chuck frame boss is arranged on the second end surface along the inner edge; the wire coil is rotatably sleeved outside the boss of the chuck frame, the circular end face facing the second end face of the chuck frame is a first end face, the circular end face opposite to the first end face is a second end face, the first end face is provided with a spiral groove, and the second end face is fixedly connected with the speed regulating gear; the jack catch is arranged in the jack catch groove in a sliding mode, and the side face, facing the wire coiling, of the jack catch is provided with jack catch teeth meshed with the spiral groove of the wire coiling.
Further, a wire coiling accommodating groove is formed in the second end face of the chuck frame; the circular end face of the speed regulating gear, which faces the wire coiling, is a first end face, the circular end face opposite to the first end face is a second end face, and a first boss of the speed regulating gear is arranged on the first end face; the first boss of the speed regulating gear is rotatably sleeved outside the boss of the chuck frame, and the annular end face of the first boss of the speed regulating gear is fixed on the second end face of the wire coiling.
Further, first bearings are arranged between the first boss of the speed regulating gear and the boss of the chuck frame and between the wire coiling and the boss of the chuck frame.
Furthermore, the novel automatic chuck further comprises a clamping ring fixedly sleeved on the annular end face of the chuck rack boss.
Furthermore, the novel automatic chuck further comprises a clamping ring which is sleeved outside the boss of the chuck rack and is positioned between the two first bearings.
Furthermore, the novel automatic chuck also comprises a second bearing, wherein the outer ring of the second bearing is fixed on the box body; a second boss of the speed regulating gear is arranged on the second end surface of the speed regulating gear along the inner edge; the power gear deviates from the circular end face of the chuck rack and is a first end face, and a power gear boss is arranged on the first end face along the inner edge; the second boss of the speed regulating gear and the boss of the power gear are respectively fixedly sleeved in the inner ring of the second bearing.
Furthermore, the novel automatic chuck further comprises a bearing end cover fixed outside the box body.
Further, the clamping jaw extends out of the clamping jaw groove from the clamping jaw groove; a base plate is arranged between every two adjacent clamping jaws; the thickness of the pad plate is larger than that of the part outside the clamping jaw groove outside the clamping jaw, and the pad plate is fixed on the clamping chuck frame.
Furthermore, a limiting bulge is arranged in the jaw slot along the radial direction of the chuck rack; the clamping jaw is provided with a limiting groove for accommodating the limiting bulge.
Further, the box body comprises an upper box body and a lower box body.
The invention has the beneficial effects that:
the novel automatic chuck replaces the prior holder to be installed in front of a power head of a drilling machine, a drill rod is installed, the drill rod passes through the novel automatic chuck, the drilling machine is started, the output value of a power source is adjusted, the rotating speed of a power gear and a speed regulating gear is the same as that of the drill rod, the power gear drives a chuck frame and a jaw to rotate, the speed regulating gear drives a wire coil to rotate, the relative speed between the jaw and the wire coil on the chuck frame and the jaw and the wire coil on the chuck frame are zero, the jaw keeps an initial state, the rotating speed of the power gear is kept unchanged when the drill rod is connected, the rotating speed of the speed regulating gear is adjusted to generate a forward speed difference between the wire coil and the chuck frame, the wire coil rotates forward relative to the chuck frame, the jaw meshed with a spiral groove of the wire coil extends inwards to clamp the drill rod, the drill rod to be connected is connected to the drill rod, the rotating speed of the, the wire rod rotates reversely relative to the chuck frame, the clamping jaws meshed with the spiral grooves of the wire rod extend outwards to realize the loosening of the drill rod, and in the process of clamping or loosening the drill rod, the chuck frame and the clamping jaws on the chuck frame are still in a synchronous rotating state with the drill rod, so that the power head of the drilling machine does not need to be stopped.
Drawings
FIG. 1 is a front view of a novel automatic chuck provided by an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the novel automatic chuck shown in FIG. 1;
FIG. 3 is a schematic view of the internal structure of the novel automatic chuck shown in FIG. 1 in another direction;
FIG. 4 is a cross-sectional view taken in the direction A-A of the novel automatic chuck of FIG. 1;
FIG. 5 is a perspective half sectional view of a portion of the novel automatic chuck of FIG. 1 positioned within a housing;
FIG. 6 is a half sectional view of a portion of the novel automatic chuck of FIG. 1 positioned within a housing;
FIG. 7 is a schematic structural view of a power gear in the novel automatic chuck shown in FIG. 1;
FIG. 8 is a schematic structural view of a speed regulating gear in the novel automatic chuck shown in FIG. 1;
fig. 9 is a schematic view of a chuck holder of the novel automatic chuck shown in fig. 1.
In the figure: 1-a box body; 2-a power gear; 2.1-power gear boss; 3-speed regulating gear; 3.1-first boss of speed regulating gear; 3.2-second boss of speed regulating gear; 4-a chuck holder; 4.1-pawl slot; 4.2-chuck holder boss; 4.3-wire coiling accommodating groove; 5-coiling silk; 6-clamping jaws; 7-a transmission gear; 8-a first bearing; 9-a collar; 10-a snap ring; 11-a second bearing; 12-a bearing end cap; 13-a backing plate; 14-a hydraulic motor; 15-a flat end holding screw of an inner hexagon; 16-socket head cap screw; 17-cross recessed pan head screw; 18-flat washers; 19-elastic gasket.
Detailed Description
The embodiment provides a novel automatic chuck which is arranged in front of a power head of a drilling machine and comprises a box body 1, a power gear 2, a speed regulating gear 3, a chuck rack 4, a wire coiling 5, a clamping jaw 6, a power source for respectively providing rotating power for the power gear 2 and the speed regulating gear 3 and a transmission gear 7 for respectively transmitting torque for the power gear 2 and the speed regulating gear 3; the power gear 2, the speed regulating gear 3, the chuck frame 4 and the wire coiling 5 are all in annular structures, and the circle centers of the two structures are collinear; the power gear 2 and the speed regulating gear 3 are respectively and rotatably arranged in the box body 1; the chuck frame 4 is positioned between the power gear 2 and the speed regulating gear 3, the circular end face fixedly connected with the power gear 2 is a first end face, the circular end face opposite to the first end face is a second end face, at least three chuck jaw grooves 4.1 are uniformly arranged on the first end face along the circumferential direction, and a chuck frame boss 4.2 is arranged on the second end face along the inner edge; the wire coil 5 is rotatably sleeved outside the chuck frame boss 4.2, the circular end face facing the second end face of the chuck frame 4 is a first end face, the circular end face opposite to the first end face is a second end face, a spiral groove is formed in the first end face, and the second end face is fixedly connected with the speed regulating gear 3; the claw 6 is arranged in the claw groove 4.1 in a sliding mode, and a claw tooth meshed with the spiral groove of the wire coil 5 is arranged on the side face, facing the wire coil 5.
The novel automatic chuck replaces the prior holder to be installed in front of a power head of a drilling machine, a drill rod is installed, the drill rod passes through the novel automatic chuck, the drilling machine is started, the output value of a power source is adjusted, the rotating speed of a power gear 2 and a speed regulating gear 3 is the same as that of the drill rod, the power gear 2 drives a chuck frame 4 and a jaw 6 to rotate, the speed regulating gear 3 drives a coil wire 5 to rotate, the relative speed between the chuck frame 4 and the jaw 6 on the chuck frame 4 and the coil wire 5 is zero, the jaw 6 keeps an initial state, the rotating speed of the power gear 2 is kept unchanged when the drill rod is connected, the rotating speed of the speed regulating gear 3 is adjusted to generate a forward speed difference between the coil wire 5 and the chuck frame 4, the coil wire 5 rotates forward relative to the chuck frame 4, the jaw 6 meshed with a spiral groove of the coil wire 5 extends inwards to clamp the drill rod, and the drill rod to be, and the rotating speed of the speed regulating gear 3 is regulated again to generate reverse speed difference between the wire coil 5 and the chuck frame 4, the wire coil 5 rotates reversely relative to the chuck frame 4, the clamping jaws 6 meshed with the spiral grooves of the wire coil 5 extend outwards to realize the loosening of the drill rod, and in the process of clamping or loosening the drill rod, the chuck frame 4 and the clamping jaws 6 on the chuck frame 4 are still in a rotating state synchronous with the drill rod, so that the power head of the drilling machine does not need to be stopped.
The specific mounting manner of the speed gear 3, the chuck holder 4 and the wire coil 5 can be as follows: the first end face of the wire coiling 5 is directly attached to the second end face of the chuck frame 4, and the circular end face of the speed regulating gear 3 is directly attached to the second end face of the wire coiling 5; or the first end face of the wire coiling 5 is directly attached to the second end face of the chuck rack 4, and the circular end face of the speed regulating gear 3 is provided with a connecting part, such as an annular connecting platform, for connecting the second end face of the wire coiling 5. In the present embodiment, preferably, the second end face of the chuck holder 4 is provided with a wire coil accommodating groove 4.3 for mounting the wire coil 5 while limiting radial play of the wire coil 5; the circular end face of the speed regulating gear 3 facing the wire coil 5 is a first end face, the circular end face opposite to the first end face is a second end face, and a first boss 3.1 of the speed regulating gear is arranged on the first end face; the first boss 3.1 of the speed regulating gear is rotatably sleeved outside the boss 4.2 of the chuck rack, and the annular end face of the first boss 3.1 of the speed regulating gear is fixed on the second end face of the wire coiling 5 so as to drive the wire coiling 5 to rotate through the speed regulating gear 3.
Further, first bearings 8 are arranged between the first boss 3.1 of the speed regulating gear and the boss 4.2 of the chuck holder and between the wire coil 5 and the boss 4.2 of the chuck holder, so that the resistance of the speed regulating gear 3 and the wire coil 5 in rotation is reduced, and the rotation is smoother. Preferably, the first bearing 8 is a thin arm bearing.
Further, the novel automatic chuck further comprises a clamping ring 9 fixedly sleeved on the annular end face of the chuck holder boss 4.2 so as to limit the axial movement of the first bearing 8.
Further, above-mentioned novel automatic chuck still includes the snap ring 10 that the cover is established outside chuck holder boss 4.2 and is located between two first bearings 8, and cooperation rand 9 restricts the location to two first bearings 8.
Further, the specific implementation manner of the power gear 2 and the speed regulating gear 3 rotatably disposed in the box 1 is as follows: the novel automatic chuck also comprises a second bearing 11, the outer ring of which is fixed on the box body 1; a second boss 3.2 of the speed regulating gear is arranged on the second end surface of the speed regulating gear 3 along the inner edge; the circular end face of the power gear 2, which deviates from the chuck rack 4, is a first end face, and a power gear boss 2.1 is arranged on the first end face along the inner edge; the second boss 3.2 of the speed regulating gear and the boss 2.1 of the power gear are respectively fixedly sleeved in the inner ring of the second bearing 11. Specifically, the second bearing 1 is a deep groove ball bearing.
Further, above-mentioned novel automatic chuck still includes and fixes bearing end cover 12 outside box 1 to carry out axial spacing to second bearing 1, also play certain dustproof effect.
Further, the jaw 6 extends from the inside of the jaw slot 4.1 to the outside of the jaw slot 4.1 for installation; a backing plate 13 is arranged between every two adjacent clamping jaws 6; the backing plate 13 is thicker than the part of the claw 6 outside the claw groove 4.1 and is fixed on the chuck rack 4 to avoid the interference between the power gear 2 and the claw 6.
Furthermore, a limiting bulge is arranged in the jaw slot 4.1 along the radial direction of the chuck holder 4; the jaw 6 is provided with a limiting groove for accommodating the limiting protrusion, so that the jaw 6 is ensured to slide along the radial direction of the chuck rack 4, and the jaw 6 is prevented from slipping from the jaw groove 4.1.
Further, the case 1 includes an upper case and a lower case, and a specific shape structure is designed according to a function.
Furthermore, the spiral grooves of the wire rod 5 adopt Archimedes threads with equal thread pitches, and the rotation of the gear can enable the claws 6 to simultaneously approach to the center or withdraw from the center by the same distance, so that the automatic centering function is realized.
Further, the transmission gear 7 has a diameter smaller than those of the power gear 2 and the speed gear 3 to transmit a larger torque.
Further, the power source is a hydraulic motor 14, a hollow boss is arranged on the end face, connected with the hydraulic motor 14, of the speed regulating gear 3, a threaded hole is formed in the radial direction of the boss, an output shaft of the hydraulic motor 14 penetrates through the boss, and a hexagon socket flat end set screw 15 penetrates through the threaded hole to assemble the speed regulating gear 3 on the hydraulic motor 14.
In this embodiment, specifically, the power gear 2 and the backing plate 13 are fixed on the chuck holder 4 by hexagon socket cap screws 16, the annular end face of the first boss 3.1 of the speed adjusting gear is welded on the second end face of the wire coil 5, the collar 9 is fixed on the annular end face of the chuck holder boss 4.2 by cross-recessed pan head screws 17, the bearing end cover 12 is fixed outside the box body 1 by the hexagon socket cap screws 16, and a flat washer 18 and an elastic washer 19 are arranged between the bearing end cover 12 and the hexagon socket head screws 16.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.
Claims (10)
1. A novel automatic chuck is characterized by being arranged in front of a power head of a drilling machine and comprising a box body, a power gear, a speed regulating gear, a chuck frame, a wire coiling, a clamping jaw, a power source for respectively providing rotating power for the power gear and the speed regulating gear and a transmission gear for respectively transmitting torque for the power gear and the speed regulating gear;
the power gear, the speed regulating gear, the chuck frame and the wire coil are all in annular structures, and the circle centers of the power gear, the speed regulating gear, the chuck frame and the wire coil are collinear;
the power gear and the speed regulating gear are respectively and rotatably arranged in the box body;
the chuck frame is positioned between the power gear and the speed regulating gear, the circular end face fixedly connected with the power gear is a first end face, the circular end face opposite to the first end face is a second end face, at least three chuck jaw grooves are uniformly arranged on the first end face along the circumferential direction, and a chuck frame boss is arranged on the second end face along the inner edge;
the wire coil is rotatably sleeved outside the boss of the chuck frame, the circular end face facing the second end face of the chuck frame is a first end face, the circular end face opposite to the first end face is a second end face, the first end face is provided with a spiral groove, and the second end face is fixedly connected with the speed regulating gear;
the jack catch is arranged in the jack catch groove in a sliding mode, and jack catch teeth meshed with the spiral groove of the wire coiling are arranged on the side face, facing the wire coiling, of the jack catch.
2. The novel automatic chuck according to claim 1, wherein a wire holding groove is provided on the second end face of the chuck holder;
the circular end face of the speed regulating gear, which faces the wire coiling, is a first end face, the circular end face opposite to the first end face is a second end face, and a first boss of the speed regulating gear is arranged on the first end face;
the first boss of the speed regulating gear is rotatably sleeved outside the boss of the chuck frame, and the annular end face of the first boss of the speed regulating gear is fixed on the second end face of the wire coiling.
3. The novel automatic chuck according to claim 2, wherein first bearings are disposed between the first boss of the speed regulating gear and the boss of the chuck holder and between the wire rod and the boss of the chuck holder.
4. The automatic chuck as claimed in claim 3, further comprising a retainer ring fixedly fitted over the annular end surface of the chuck holder boss.
5. The novel automatic chuck according to claim 3 or 4, further comprising a snap ring disposed between the two first bearings and disposed outside the chuck holder boss.
6. The novel automatic chuck according to claim 5, further comprising a second bearing having an outer race fixed to the housing;
a second boss of the speed regulating gear is arranged on the second end surface of the speed regulating gear along the inner edge;
the power gear is a first end face deviating from the circular end face of the chuck rack, and a power gear boss is arranged on the first end face along the inner edge;
and the second boss of the speed regulating gear and the boss of the power gear are respectively fixedly sleeved in the inner ring of the second bearing.
7. The novel automatic chuck according to claim 6, further comprising a bearing end cap fixed outside the housing.
8. The new automatic chuck according to claim 1, wherein said jaws extend from inside the jaw slots to outside the jaw slots;
a base plate is arranged between every two adjacent clamping jaws;
the thickness of the cushion plate is larger than that of the part outside the clamping jaw groove and fixed on the clamping chuck frame.
9. The novel automatic chuck according to claim 8, wherein the jaw groove is provided with a limit protrusion along a radial direction of the chuck holder;
and the clamping jaw is provided with a limiting groove for accommodating the limiting bulge.
10. The novel automatic chuck according to claim 1, wherein said housing comprises an upper housing and a lower housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127651.1A CN109209261B (en) | 2018-09-27 | 2018-09-27 | Novel automatic chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127651.1A CN109209261B (en) | 2018-09-27 | 2018-09-27 | Novel automatic chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109209261A CN109209261A (en) | 2019-01-15 |
| CN109209261B true CN109209261B (en) | 2020-05-05 |
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ID=64981845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811127651.1A Active CN109209261B (en) | 2018-09-27 | 2018-09-27 | Novel automatic chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209261B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116464407B (en) * | 2023-06-19 | 2023-08-29 | 太原理工智能钻进研究院有限公司 | Automatic replacing device for drill rod of drilling machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9347282B1 (en) * | 2012-02-01 | 2016-05-24 | David L. Sipos | High torque capacity spider |
| CN103821467B (en) * | 2014-03-07 | 2015-11-18 | 湖南科技大学 | A kind of automatic drilling machine hydraulic power chuck |
| CN205309362U (en) * | 2015-12-31 | 2016-06-15 | 东莞市环宇文化科技有限公司 | Chuck device |
| CN106238761B (en) * | 2016-09-29 | 2018-11-27 | 东莞市凌美激光科技有限公司 | A kind of self-centering chuck |
| CN106761482B (en) * | 2016-12-01 | 2019-03-22 | 太原理工大学 | A kind of Automatic-clamping release mechanism formula chuck |
| CN108278090B (en) * | 2018-03-20 | 2022-05-20 | 西南石油大学 | Chuck tool used in process of jetting conduit under coiled tubing |
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2018
- 2018-09-27 CN CN201811127651.1A patent/CN109209261B/en active Active
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| CN109209261A (en) | 2019-01-15 |
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Effective date of registration: 20200824 Address after: 035404 guanjiaying Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province Patentee after: SHANXI GUANJIAYING FLANGE FORGING GROUP Co.,Ltd. Address before: 030024 West Street, Taiyuan, Shanxi, No. 79, No. Patentee before: Taiyuan University of Technology |
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| CP03 | Change of name, title or address | ||
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Address after: 035404 Guanjiaying Industrial Park, Shenshan Township, Dingxiang County, Xinzhou, Shanxi Province Patentee after: Shanxi Guanjiaying Flange Forging Co.,Ltd. Country or region after: China Address before: 035404 Guanjiaying Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province Patentee before: SHANXI GUANJIAYING FLANGE FORGING GROUP CO.,LTD. Country or region before: China |