CN110560614A - Flue rectangle steel wire cylinder mould hem former - Google Patents
Flue rectangle steel wire cylinder mould hem former Download PDFInfo
- Publication number
- CN110560614A CN110560614A CN201910913882.3A CN201910913882A CN110560614A CN 110560614 A CN110560614 A CN 110560614A CN 201910913882 A CN201910913882 A CN 201910913882A CN 110560614 A CN110560614 A CN 110560614A
- Authority
- CN
- China
- Prior art keywords
- folding knife
- long handle
- folding
- flue
- steel wire
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000000465 moulding Methods 0.000 claims description 6
- 230000003028 elevating effect Effects 0.000 claims 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
- B21F27/14—Specially bending or deforming free wire ends
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses a flue rectangular steel wire mesh cage flanging forming device which comprises a rack, a first lifting device, a folding knife device and an operating platform, wherein a through long slot matched with the folding knife device is arranged on the operating platform, the operating platform is connected with the rack, the first lifting device is arranged in the rack and driven by the first lifting device to move up and down, the folding knife device comprises a folding knife girder, a folding knife long handle and a folding knife opening, the folding knife girder is fixedly connected with the folding knife long handle, the folding knife opening is connected below the folding knife long handle, the folding knife girder is positioned in the rack, the folding knife long handle extends along the length direction of the operating platform, and the first lifting device is connected with one end of the folding knife girder close to the folding knife long handle, so that the web folding machine is realized, the operation is simple, the flue rectangular steel wire mesh cage flanging can be efficiently completed, the labor intensity is reduced, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of building production component processing, in particular to flue rectangular steel wire mesh cage edge folding forming equipment.
Background
At present, the quality requirement of the residential exhaust flue industry on a cement flue is higher and higher, in order to achieve a soft resistance index, the existing process is to thicken wire ribs of a steel wire mesh, the labor intensity of manual edge folding is increased after the wire ribs are thickened, and when the wire ribs are thickened to a certain diameter, manual operation cannot be performed. Because the flue wire net needs a complete rectangular cylinder mould that is long about 3m, the cover is wrapped up in the surface of flue machine centre form, so the size requirement to the cylinder mould hem is very high, needs an equipment that can accomplish the hem automatically and high-efficiently.
Disclosure of Invention
the invention aims to provide forming equipment capable of efficiently finishing folding edges of a rectangular steel wire mesh cage of a flue, so that the labor intensity is reduced, and the working efficiency is improved.
In order to solve the technical problem, the invention provides flue rectangular steel wire mesh cage flanging forming equipment which comprises a rack, a first lifting device, a folding knife device and an operating platform, wherein a through long slot matched with the folding knife device is formed in the operating platform, the operating platform is connected with the rack, the first lifting device is arranged in the rack, the folding knife device is driven by the first lifting device to move up and down, the folding knife device comprises a folding knife girder, a folding knife long handle and a folding knife opening, the folding knife girder is fixedly connected with the folding knife long handle, the folding knife opening is connected below the folding knife long handle, the folding knife girder is located in the rack, the folding knife long handle extends along the length direction of the operating platform, and the first lifting device is connected with one end, close to the folding knife long handle, of the folding knife girder.
Furthermore, a counterweight hammer is arranged at one end, far away from the folding knife long handle, of the folding knife crossbeam.
Furthermore, the two ends of the folding knife girder are connected with vertically arranged sliding sleeves, and sliding rods matched with the sliding sleeves are arranged in the rack.
Furthermore, one end of the folding knife long handle, which is far away from the folding knife girder, is provided with a bolt pile, and one end of the operating platform is provided with a bolt hole matched with the bolt pile.
Furthermore, a table top groove opening is formed in the table top of the operating table along the width direction of the operating table, and a scale is embedded in the table top groove opening.
furthermore, a wire binding guide post is arranged on the side edge of one end, connected with the folding knife girder, of the folding knife long handle, the wire binding is drawn out from a wire binding disc and guided by the guide post and fixed at the other end of the folding knife long handle, and the wire binding disc is installed in the rack.
furthermore, the molding equipment further comprises a second lifting device, the second lifting device is arranged in the rack, and the first lifting device is installed on the second lifting device.
Furthermore, the second lifting device comprises a driving motor, a screw rod and a lifting frame, the driving motor is installed on the lower portion of the rack, the screw rod is arranged in the vertical direction and is connected with the rack in a rotating mode, the driving motor drives the screw rod to rotate through a chain wheel, and the lifting frame is fixedly connected with a screw rod nut on the screw rod in a sleeved mode.
Furthermore, a plurality of holes are formed in the side surface of the folding knife long handle.
Compared with the prior art, the flue meaningful steel wire mesh cage edge folding forming equipment has the advantages that the web folding mechanization is realized, the operation is simple, the flue rectangular steel wire mesh cage edge folding can be efficiently completed, the labor intensity is reduced, and the working efficiency is improved.
Drawings
FIG. 1 is a side view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of an embodiment of the present invention;
FIG. 3 is a top view of a second embodiment of the present invention;
FIG. 4 is a three-sided view of an embodiment of the present invention;
FIG. 5 is a schematic view of a netpen binding wire of the present invention;
fig. 6 is a third front view of an embodiment of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, which is a side view of an embodiment of a flue rectangular steel wire mesh cage flanging forming device of the present invention, the forming device in this embodiment includes a frame 10, a first lifting device 11, a folding knife device 30, and an operation table 20, the operation table 20 is provided with a through long slot 21 matched with the folding knife device 30, referring to fig. 2, which is a schematic diagram of the working time of this embodiment, during flanging, the lifting of the folding knife device 30 is controlled by the first lifting device 11 arranged in the frame 10, the folding knife device 30 is pressed into the through long slot 21, the middle part of a steel wire mesh is pressed into the through long slot 21, and both sides of the steel wire mesh are tilted due to the blocking of the operation table 20 surfaces on both sides of the through long slot 21, so as to realize flanging of the steel wire mesh on the operation table 20, and finally form a mesh cage 50, which is simple in operation.
Referring to fig. 1, because the length of the netpen 50 is long, the operation panel 20 is separately arranged on one side of the frame 10, and the operation panel 20 is connected with the frame 10, the first lifting device 11 is arranged in the frame 10, the first lifting device 11 is convenient to mount and fix, in this embodiment, the first lifting device 11 is a lifting cylinder, a telescopic rod of the lifting cylinder is connected with the folding knife device 30, the folding knife device 30 is driven by the lifting cylinder to move up and down, and the cylinder can provide a large pushing force, so that the lifting cylinder is adopted in this embodiment, and sufficient pressure can be provided for folding edges of the folding knife device 30. Because the cylinder mould 50 length is longer equally, for making folding knife device 30 can once only carry out the hem to one side of wire net piece, folding knife device 30 length is not less than the length of the wire cylinder mould 50 behind the hem, folding knife device 30 includes folding knife girder 31, folding knife long handle 32 and folding knife mouth 33, and thinner folding knife mouth 33 can make the wire net piece bend more easily when pushing down, and thicker folding knife long handle 32 has improved the intensity of a sword 33, sets up folding knife girder 31 and is convenient for to folding knife device 30 application of force, and is concrete, folding knife girder 31 with folding knife long handle 32 fixed connection, folding knife mouth 33 connect in folding knife long handle 32 below, folding knife girder 31 is located in the frame 10, folding knife long handle 32 is followed operation panel 20 length direction extends. In order to realize the folding of the steel wire mesh by the folding knife device 30, and therefore the lengths of the folding knife long handle 32 and the folding knife edge 33 are longer, in order to ensure the balance of the folding knife device 30 as much as possible, the first lifting device 11 is connected with one end of the folding knife girder 31 close to the folding knife long handle 32, that is, the connection point of the first lifting device 11 and the folding knife device 30 is as close to the middle of the folding knife device 30 as possible. However, since the folding knife long handle 32 and the folding knife edge 33 are too long, in order to further ensure the balance of the folding knife device 30, a counterweight 34 is arranged at one end of the folding knife girder 31 far away from the folding knife long handle 32.
Referring to fig. 1 and 2, since the folding knife device 30 is long, in order to ensure that the folding knife device 30 does not shake or deviate from the position when the first lifting device 11 is driven to lift, two ends of the folding knife girder 31 are connected with the sliding sleeves 35 which are vertically arranged, the slide bar 12 which is matched with the sliding sleeves 35 is arranged in the rack 10, and the sliding sleeves 35 are sleeved on the slide bar 12, so that the folding knife device 30 can only move along the axial direction of the slide bar 12, and the working stability of the folding knife device 30 is ensured. Furthermore, because the first lifting device 11 is located at one end of the folding knife long handle 32, when the first lifting device 11 drives the folding knife device 30 to press down, the two ends of the folding knife long handle 32 are stressed differently, so that the free end of the folding knife long handle 32 is easy to deviate from the direction of the through long slot 21, in order to ensure that the folding knife long handle 32 does not deviate when being pressed down, a bolt pile 36 is arranged at one end of the folding knife long handle 32, which is far away from the folding knife girder 31, and a bolt hole 22 matched with the bolt pile 36 is arranged at one end of the operating platform 20. When the folding knife long handle 32 and the folding knife edge 33 are driven to be pressed downwards, the bolt pile 36 is firstly matched with the bolt hole 22, and due to the guiding of the bolt hole 22 to the bolt pile 36, even if the folding knife long handle 32 and the folding knife edge 33 are pressed downwards forcibly, the other end of the folding knife long handle 32 cannot generate deviation, the matching of the folding knife edge 33 and the through long slot 21 is ensured, and the accurate folding of the steel wire net cage 50 is realized. In this embodiment, the end of the bolt pile 36 that matches the bolt hole 22 is tapered, so that when there is some error between the bolt pile 36 and the bolt hole 22, the bolt pile 36 can be inserted into the bolt hole 22 by the guidance of the tapered surface.
Referring to fig. 3, which is a top view of a second embodiment of the present invention, in this embodiment, in order to control the width of each folded edge of the steel mesh, a table top notch 23 is formed in the table top of the operating table 20 along the width direction of the table top, and a scale 24 is embedded in the table top notch 23. Scale 24 on the contrast operation platform face removes the wire net piece, ensures that the width of hem is required size, simultaneously with scale 24 embedding mesa notch 23 in, scale 24 can not be outstanding and wire net form to interfere, influences the removal of wire net piece, and reduces the wire net piece and remove the wearing and tearing to scale 24, extension scale 24's life.
Referring to fig. 4, which is a schematic view of a third structure of an embodiment of the present invention, in order to fix two ends of a steel wire mesh after all sides of a netpen 50 are folded, in this embodiment, in order to fix both ends of the steel wire mesh after all sides of the netpen 50 are folded, a binding wire guide post 42 is disposed on a side edge of one end of the folding knife long handle 32 connected to the folding knife girder 31, a binding wire 41 is guided by the guide post 42 and fixed to the other end of the folding knife long handle 32 after being drawn out from a binding wire tray 43, that is, a binding wire 41 is disposed on one side of the folding knife long handle 32, referring to fig. 5, which is a schematic view of binding wires for closing the edges of the netpen 50, after folding is completed, the folding knife long handle 32 is lifted to the top of the netpen 50, so that the closed edges of the netpen 50 are closely attached to the side surface of the folding knife long handle 32, a hook is used to penetrate through meshes of the netpen 50, the netpen 41 on the side edge of, and then the net cage 50 is pulled out along the length direction of the folding knife long handle 32, the binding wire 41 is pulled out, after the net cage 50 is pulled out completely, the binding wire 41 is cut off, and the end part of the binding wire 41 is fixed with the end part of the folding knife long handle 32 again, so that the next operation is convenient. To continuously pull out the wire 41, the wire tying disk 43 is mounted in the housing 10. Furthermore, because the tie wire 41 is thin and is attached to the side surface of the folding knife long handle 32, when the hook tool hooks the tie wire 41, the tie wire 41 is not easy to hook out, therefore, the side surface of the folding knife long handle 32 is provided with a plurality of holes 37, the holes 37 and the tie wire 41 are at the same height, at the position where the holes 37 are arranged, one side of the tie wire 41 is provided with the net cage 50, the other side of the tie wire 41 is provided with the holes 37, when the wire is tied, the double-hook tool penetrates through two meshes of the net cage 50 and extends into the holes 37 of the folding knife long handle 32, the angle of the double-hook tool is adjusted to ensure that the wire drawing 41 is hooked out, and then the double-hook tool rotates to screw the tie wire 41 which is pulled out. Through setting up hole 37, can alleviate the weight of the long handle 32 of jack on the one hand, on the other hand conveniently ties out of silk 41, adopts the double hook instrument to make the screwing up of tying up silk 41 more convenient simultaneously, improves work efficiency.
Referring to fig. 4 and 6, since the first lifting device 11 is mainly used for pressing down the folding knife device 30, the first lifting device 11 cannot lift the folding knife long handle 32 to the top of the netpen 50, in order to lift the folding knife long handle 32, the forming apparatus further includes a second lifting device 13, the second lifting device 13 is disposed in the rack 10, the first lifting device 11 is mounted on the second lifting device 13, and the folding knife device 30 is connected to the first lifting device 11, so that when the folding knife long handle 32 is lifted by the second lifting device 13, the first lifting device 11 needs to be mounted on the second lifting device 13. Specifically, the second lifting device 13 includes a driving motor 131, a screw rod 132 and a lifting frame 133, the driving motor 131 is installed at the lower part of the frame 10, the screw rod 132 is arranged along the vertical direction and is rotatably connected with the frame 10, the driving motor 131 drives the screw rod 132 to rotate through a chain wheel, and the lifting frame 133 is fixedly connected with a screw rod nut sleeved on the screw rod 132. When the driving motor 131 drives the screw rod 132 to rotate, the screw rod nut on the screw rod 132 moves up and down along the length direction of the screw rod 132 so as to drive the lifting frame 133 fixedly connected with the screw rod 132 to move up and down, and when the flanging operation is performed, the lifting frame 133 descends, so that the first lifting device 11 can press the flanging opening 33 into the through-length slot 21; after the folding is completed, the lifting frame 133 is lifted to drive the folding knife long handle 32 to be lifted to the top of the net cage 50, and the wire 41 is tied.
When the folding device works, a steel wire mesh is flatly laid on an operation platform, a telescopic rod of a lifting cylinder of a first lifting device 11 is used for driving a folding knife girder 31 to move up and down, a folding knife edge 33 is driven to be inserted into a through long slot 21 of an operation table 20, the steel wire mesh forms a folding angle with the through length of 90 degrees, the steel wire mesh is moved by a set size according to a scale 24 on the table top of the operation table 20, and then a flat steel wire mesh can be folded into a rectangular steel wire mesh cage 50 by the same method. After the folding is finished, the second lifting device 13, the folding knife girder 31 and the folding knife long handle 32 move upwards together to reach the top of the net cage 50 through the driving motor 131 at the bottom of the machine frame 10 to stop, the steel wire net cage 50 is tightly attached to the side face of the folding knife girder 31 at the closed edge, a double-hook tool is used for passing through the meshes and corresponding to the holes 37 on the side face of the folding knife handle, the binding wires 41 reserved on the side face of the folding knife long handle 32 are hooked out and rotated repeatedly at intervals, so that the net cage 50 can be woven into a complete square net cage 50, the net cage 50 and the binding wires 41 are pulled out together to one end of the outlet of the folding knife long handle 32 to cut off the binding wires 41, the end parts of the binding wires 41 and the end parts of the folding knife long handle 32 are fixed, the second lifting device 13 returns to the initial point again to wait for the next operation, the whole operation process is simple and easy to learn, the difficulty of net folding is overcome for the flue.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (9)
1. The utility model provides a flue rectangle steel wire cylinder mould hem former, its characterized in that, includes frame, first elevating gear, jack knife device and operation panel, be provided with on the operation panel with jack knife device complex leads to long slot, the operation panel with the frame meets, first elevating gear set up in the frame, jack knife device by first elevating gear drive reciprocates, jack knife device includes jack knife girder, jack knife long handle and jack knife mouth, jack knife girder with jack knife long handle fixed connection, the jack knife connect in jack knife long handle below, the jack knife girder is located in the frame, jack knife long handle is followed the operation panel length direction extends, first elevating gear with the jack knife girder is close to the one end of jack knife long handle is connected.
2. The flue rectangular steel wire mesh cage edge folding forming device as claimed in claim 1, wherein a counterweight hammer is arranged at one end of the folding knife girder far away from the folding knife long handle.
3. The flue rectangular steel wire mesh cage flanging molding device as claimed in claim 1, wherein a vertically arranged sliding sleeve is connected to two ends of the folding knife girder, and a sliding rod matched with the sliding sleeve is arranged in the machine frame.
4. The flue rectangular steel wire mesh cage flanging molding device as claimed in claim 1, wherein a bolt pile is arranged at one end of the folding knife long handle far away from the folding knife crossbeam, and a bolt hole matched with the bolt pile is arranged at one end of the operating platform.
5. the flue rectangular steel wire mesh cage flanging molding device as claimed in claim 1, wherein a table top notch is formed in the table top of the operating table along the width direction of the operating table, and a scale is embedded in the table top notch.
6. The flue rectangular steel wire mesh cage edge folding forming equipment as claimed in claim 1, wherein a wire binding guide column is arranged on a side edge of one end, connected with the folding knife girder, of the folding knife long handle, a wire binding is drawn out of a wire binding disc, guided by the guide column and fixed to the other end of the folding knife long handle, and the wire binding disc is installed in the machine frame.
7. The flue rectangular wire mesh cage flanging forming device as claimed in claim 6, wherein the forming device further comprises a second lifting device, the second lifting device is arranged in the machine frame, and the first lifting device is mounted on the second lifting device.
8. The flue rectangular steel wire mesh cage flanging molding device as claimed in claim 7, wherein the second lifting device comprises a driving motor, a screw rod and a lifting frame, the driving motor is installed at the lower part of the frame, the screw rod is arranged in the vertical direction and is rotatably connected with the frame, the driving motor drives the screw rod to rotate through a chain wheel, and the lifting frame is fixedly connected with a screw rod nut sleeved on the screw rod.
9. The flue rectangular steel wire mesh cage flanging molding device as claimed in claim 6, wherein a plurality of holes are formed in the side surface of the folding knife long handle, and the holes and the binding wires are located at the same height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910913882.3A CN110560614A (en) | 2019-09-25 | 2019-09-25 | Flue rectangle steel wire cylinder mould hem former |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910913882.3A CN110560614A (en) | 2019-09-25 | 2019-09-25 | Flue rectangle steel wire cylinder mould hem former |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110560614A true CN110560614A (en) | 2019-12-13 |
Family
ID=68782476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910913882.3A Pending CN110560614A (en) | 2019-09-25 | 2019-09-25 | Flue rectangle steel wire cylinder mould hem former |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110560614A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3774434A (en) * | 1971-09-14 | 1973-11-27 | R Bock | Arrangement for bending of bars of reinforcing steel mats |
| EP1539397A1 (en) * | 2002-07-23 | 2005-06-15 | Stema Engineering A/S | Method and apparatus for the manufacture of concrete reinforcing rod mesh |
| CN102814432A (en) * | 2012-08-25 | 2012-12-12 | 永城煤电控股集团有限公司 | U-shaped mesh folding device |
| CN205732389U (en) * | 2016-06-16 | 2016-11-30 | 浙江华创融盛商业展示有限公司 | A kind of multistation bender |
| CN207238839U (en) * | 2017-09-21 | 2018-04-17 | 安徽建工建筑工业有限公司 | A kind of easy reinforced mesh bending device |
| CN210754886U (en) * | 2019-09-25 | 2020-06-16 | 千瑞机电科技(丹阳)有限公司 | Flue rectangle steel wire cylinder mould hem former |
-
2019
- 2019-09-25 CN CN201910913882.3A patent/CN110560614A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3774434A (en) * | 1971-09-14 | 1973-11-27 | R Bock | Arrangement for bending of bars of reinforcing steel mats |
| EP1539397A1 (en) * | 2002-07-23 | 2005-06-15 | Stema Engineering A/S | Method and apparatus for the manufacture of concrete reinforcing rod mesh |
| CN102814432A (en) * | 2012-08-25 | 2012-12-12 | 永城煤电控股集团有限公司 | U-shaped mesh folding device |
| CN205732389U (en) * | 2016-06-16 | 2016-11-30 | 浙江华创融盛商业展示有限公司 | A kind of multistation bender |
| CN207238839U (en) * | 2017-09-21 | 2018-04-17 | 安徽建工建筑工业有限公司 | A kind of easy reinforced mesh bending device |
| CN210754886U (en) * | 2019-09-25 | 2020-06-16 | 千瑞机电科技(丹阳)有限公司 | Flue rectangle steel wire cylinder mould hem former |
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Effective date of registration: 20240523 Address after: 430070 5A / F, future mansion, 378 Wuluo Road, Hongshan District, Wuhan City, Hubei Province Applicant after: Wuhan yizhiniao Technology Co.,Ltd. Country or region after: China Address before: 212300 Xishu Village Committee, Lucheng Town, Danyang City, Zhenjiang City, Jiangsu Province Applicant before: Qianrui Electromechanical Technology (Danyang) Co.,Ltd. Country or region before: China |