CN106825862B - A kind of welder - Google Patents
A kind of welder Download PDFInfo
- Publication number
- CN106825862B CN106825862B CN201710175279.0A CN201710175279A CN106825862B CN 106825862 B CN106825862 B CN 106825862B CN 201710175279 A CN201710175279 A CN 201710175279A CN 106825862 B CN106825862 B CN 106825862B
- Authority
- CN
- China
- Prior art keywords
- distribution base
- cavity volume
- wall
- seated
- pushing block
- 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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Links
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
- B23K9/105—Power supply characterised by the electric circuit by using discharge tubes or mechanical contactors
Abstract
The invention discloses a kind of welders,Including distribution base and it is seated portion,Distribution base is secured by bolts on wall,Wall front end face above distribution base is equipped with electric pressure converter,Electric pressure converter is electrically connected by circuit and distribution base,Distribution base front end face is equipped with cuter spiral line part,Wears groove is equipped in cuter spiral line part,It is equipped in distribution base on rear side of wears groove and is seated hole,It is seated inner wall on rear side of hole and is equipped with the second inserted sheet,It is seated in the distribution base at hole rear and is equipped with the first cavity volume,Inner wall is equipped with resettlement groove on rear side of first cavity volume,Pushing block is equipped in the first cavity volume on front side of resettlement groove,Compression spring is equipped between pushing block back end surface and resettlement groove,Equity is equipped with slide bar in first cavity volume of compression spring both sides,Slide bar is connected with pushing block sliding,Pushing block front end side is provided through distribution base inner wall and enters the push strut being seated in hole,At left and right sides of pushing block open slot is equipped in end wall,Equity is equipped with spline shaft in the first cavity volume on the outside of pushing block,Spline shaft rear side end is connected with motor；The configuration of the present invention is simple, easy to operate, stable connection of powering prevent from generating electric arc during plug, occur so as to cause electric shock accidents, improve Supply Security and stability.
Description
Technical field
The present invention relates to welding technology fields, are specifically a kind of welder.
Background technology
At present, bonding machine uses more and more extensive, itself is just worked normally by for electrical connection, so for weldering
The security being electrically connected that whether consolidates and supply for electrical connection to pick is to determine the basis that can bonding machine work normally, existing
In due to voltage needed for bonding machine it is higher, easily influence by voltage during plug easily generates electric arc, the generation of electric arc is be easy to cause
The electric shock of user, protective capacities is poor, lacks protective device, there are larger security risk, meanwhile, existing middle electric welding machine
The extraneous factors such as power supply mode is grafting, and easy receipts are pulled, pullled influence and so that grafting loosens, and causes loose contact
Phenomenon is made troubles to welding job.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of welder, can solve above-mentioned show in the art
Problem.
The present invention is achieved through the following technical solutions：A kind of welder of the present invention, including distribution base and
Portion is seated, the distribution base is secured by bolts on wall, and the wall front end face above the distribution base is equipped with voltage
Converter, the electric pressure converter are electrically connected by circuit with the distribution base, and the distribution base front end face is equipped with cuter spiral line
Part, is equipped with wears groove in the cuter spiral line part, is equipped in the distribution base on rear side of the wears groove and is seated hole, it is described be seated hole after
Side inner wall is equipped with the second inserted sheet, and the first cavity volume, the first cavity volume rear side are equipped in the distribution base for being seated hole rear
Inner wall is equipped with resettlement groove, is equipped with pushing block in first cavity volume on front side of the resettlement groove, the pushing block back end surface with
Compression spring is equipped between the resettlement groove, equity is equipped with slide bar, the slide bar and institute in first cavity volume of the compression spring both sides
It states pushing block sliding to be connected, the pushing block front end side is provided through being seated hole described in the distribution base inner wall and entrance
Interior push strut, is equipped with open slot at left and right sides of the pushing block in end wall, first cavity volume on the outside of the pushing block
Interior equity is equipped with spline shaft, and the spline shaft rear side end is connected with motor, slides and is connected in the spline shaft
Have into the first tooth-like wheel in the open slot, be equipped with the second tooth-like wheel on the outside of each first tooth-like wheel, described the
The second cavity volume is equipped in the distribution base at two tooth-like wheel rears, is equipped with slippage slot on the outside of second cavity volume, described second
The spiral shell shape bar set in cavity volume equipped with front and rear stretching, extension, the spiral shell shape bar are equipped with the slipping block that whorl is connected, the spiral shell
On front side of shape bar stretch section through the distribution base wall body and into first cavity volume and with the second tooth-like wheel rear side end
Face is fixedly connected, and the portion that is seated is grouped by bolt, transfer block, interior rotating cylinder and cable.
Further technical solution, the wears groove communicate setting with the hole that is seated.
Further technical solution, the slipping block outboard end is interior into the slippage slot and sliding is connected, described
The first inserting-plate hole, the slippage slot of the first inserting-plate hole opposition are equipped in the slipping block back end surface on the inside of slippage slot
Rear side inner wall is equipped with the first inserted sheet, and first inserting-plate hole is electrically connected with first inserted sheet.
Further technical solution, the bolt is equipped with the wears groove opposite side to be connected with second inserted sheet cooperation grafting
The second inserting-plate hole connect, transfer block outer surface winding are equipped with endless groove, sliding ring, the sliding are equipped in the endless groove
Ring is fixedly connected with the interior rotating cylinder inwall, and the transfer block leaves the bolt one side and is fixedly connected with the cable.
The beneficial effects of the invention are as follows：
1. by setting pushing block in the first cavity volume on front side of resettlement groove, set between pushing block back end surface and the resettlement groove
Compression spring, equity sets slide bar in the first cavity volume of compression spring both sides, and slide bar is connected with pushing block sliding, and pushing block front end side, which is set, wears
It crosses distribution base inner wall and into push strut in hole is seated, is all provided with open slot at left and right sides of pushing block in end wall, outside pushing block
Equity sets spline shaft in first cavity volume of side, and spline shaft rear side end is connected with motor, sliding cooperation company in spline shaft
The first tooth-like wheel in open slot is tapped into, the second tooth-like wheel is all provided on the outside of each first tooth-like wheel, by controlling push strut
Cooperation is slid back and forth, so as to which the transmission of the first tooth-like wheel and the second tooth-like wheel be controlled to be connected, operating procedure is reduced, improves work
Make efficiency.
2. by being all provided with slippage slot on the outside of the second cavity volume, the spiral shell shape bar of setting, spiral shell shape bar are stretched after being equipped in the second cavity volume
On set the slipping block of whorl mating connection, on front side of spiral shell shape bar stretch section through distribution base wall body and into the first cavity volume and with
Second tooth-like wheel back end surface is fixedly connected, and so as to fulfill isolating for the first inserted sheet and the first inserting-plate hole, is prevented in swapping process
Because voltage influence generates electric arc, electric shock accidents is prevented.
3. be grouped by being seated portion by bolt, transfer block, interior rotating cylinder and cable, bolt and wears groove opposite side set to
With the second inserting-plate hole of the second inserted sheet cooperation plug connection, the winding of transfer block outer surface sets endless groove, sliding ring is set in endless groove,
Sliding ring is fixedly connected with interior rotating cylinder inwall, and transfer block leaves bolt one side and is fixedly connected with cable, so as to improve for electrical connection
When fastness, prevent that loosening the phenomenon that causing loose contact occurs.
4. the configuration of the present invention is simple, easy to operate, stable connection of powering, prevent from generating electric arc during plug, so as to cause touching
Electrification occurs, and improves Supply Security and stability.
Description of the drawings
For ease of explanation, the present invention is described in detail by following specific embodiment and attached drawing.
Fig. 1 is a kind of welder external structure schematic diagram of the present invention；
Fig. 2 is the distribution base of the present invention and is seated portion's internal structure schematic diagram；
Fig. 3 is the structure diagram of the cuter spiral line part and interior rotating cylinder of present invention when connecting；
Fig. 4 is structure diagram when bolt of the invention is abutted against with push strut；
Fig. 5 is structure diagram when the first tooth-like wheel of the present invention engages connection with the second tooth-like wheel；
Structure diagram when Fig. 6 is the first inserting-plate hole of the present invention and the fully mated connection of the first inserted sheet.
Specific embodiment
As shown in figs 1 to 6, a kind of welder of the invention including distribution base 1 and is seated portion 6, the distribution base 1
It is fixed on by bolt 101 on wall 4,4 front end face of the wall of 1 top of distribution base is equipped with electric pressure converter 3, described
Electric pressure converter 3 is electrically connected by circuit with the distribution base 1, and the electric pressure converter 3 is defeated for converting the distribution base 1
Go out voltage, so as to meet the electric requirement that connects of different capacity electric welding machine, cuter spiral line part is equipped at the 1 front end face center of distribution base
12, the cuter spiral line part 12 is interior to be equipped with wears groove 120, is equipped in the distribution base 1 of 120 rear side of wears groove and is seated hole 14,
For the 14 rear side inner wall of hole that is seated equipped with the second inserted sheet 140, the distribution base 1 for being seated 14 rear of hole is interior to be equipped with the first appearance
Chamber 11, the 11 rear side inner wall of the first cavity volume are equipped with resettlement groove 115, in first cavity volume 11 of 115 front side of the resettlement groove
Equipped with pushing block 110, compression spring 1151, the compression spring are equipped between 110 back end surface of pushing block and the resettlement groove 115
Equity is equipped with slide bar 116 in first cavity volume 11 of 1151 both sides, and the slide bar 116 coordinates with the pushing block 110 sliding
Connection, 110 front end side of pushing block are provided through the push strut being seated described in 1 inner wall of distribution base and entrance in hole 14
1102, it is equipped with open slot 1101 in 110 left and right sides end wall of pushing block, described the first of 110 outside of pushing block
Equity is equipped with spline shaft 112 in cavity volume 11, and 112 rear side end of spline shaft is connected with motor 114, the spline shaft
Sliding is connected with the first tooth-like wheel 113 into the open slot 1101, each first tooth-like wheel 113 on 112
Outside is equipped with the second tooth-like wheel 111, and the second cavity volume 13, institute are equipped in the distribution base 1 at 111 rear of the second tooth-like wheel
It states 13 outside of the second cavity volume and is equipped with slippage slot 131, the spiral shell shape bar 132 that front and rear stretching, extension is set is equipped in second cavity volume 13,
The spiral shell shape bar 132 is equipped with the slipping block 134 that whorl is connected, and the 132 front side stretch section of spiral shell shape bar is described in
1 wall body of distribution base simultaneously enters in first cavity volume 11 and is fixedly connected with 111 back end surface of the second tooth-like wheel, described to insert
Tight portion 6 is grouped by bolt 64, transfer block 61, interior rotating cylinder 62 and cable 65.
Wherein, the wears groove 120 communicates setting with the hole 14 that is seated.
Wherein, 134 outboard end of slipping block is interior into the slippage slot 131 and sliding is connected, the slippage slot
The first inserting-plate hole 135 is equipped in 134 back end surface of the slipping block of 131 insides, first inserting-plate hole 135 opposes described
131 rear side inner wall of slippage slot is equipped with the first inserted sheet 133, and first inserting-plate hole 135 electrically connects with first inserted sheet 133
It connects, is connected so as to fulfill isolation power supply, prevents accidental shock accident from occurring.
Wherein, the bolt 64 is equipped with and second inserted sheet 140 cooperation plug connection with 120 opposite side of wears groove
Second inserting-plate hole 641, the winding of 61 outer surface of the transfer block are equipped with endless groove 610, sliding ring are equipped in the endless groove 610
620, it is described sliding ring 620 be fixedly connected with interior 62 inner wall of rotating cylinder, it is described transfer block 61 leave 64 one side of bolt and
The cable 65 is fixedly connected, and fastness during electrical connection is supplied so as to improve, prevents from loosening.
During original state, pushing block 110 is subject to the elastic pressure on top surface of compression spring 1151, makes 110 front end face of pushing block and the
One cavity volume, 11 front inner wall abuts against, and is seated at this point, 1102 front end face of push strut utmostly enters in hole 14, meanwhile, it pushes away
Briquetting 110 drives the first tooth-like wheel 113 to leave 111 one side of the second tooth-like wheel, at this point, 134 front end face of slipping block is held with second
13 front end face of chamber abuts against.
When needing for electrical connection, portion 6 will be seated first and is moved to 12 front side of cuter spiral line part, bolt 64 is made to be located at wears groove
120 opposition position makes bolt 64 be gradually inserted in wears groove 120 and be moved to 14 rear side of hole is seated at this point, promoting and being seated portion 6,
Until when rotating cylinder 62 offsets with cuter spiral line part 12 in as shown in Figure 3, rotating cylinder 62 in rotation, makes interior 62 mobilization of rotating cylinder at this time
Bolt 64 on block 61 and transfer block 61 is gradually mobile towards 14 rear side of hole is seated, until bolt 64 as shown in Figure 4 and push strut
1102 front end faces abut against, and are rotated further interior rotating cylinder 62 at this time, make push strut 1102 that pushing block 110 be driven to overcome compression spring 1151
Pressure on top surface and gradually along the Slideslip backwards of slide bar 116, meanwhile, pushing block 110 drives the first tooth-like wheel 113 gradually sidesway backwards
It is dynamic, until 64 back end surface of bolt as shown in Figure 5 is abutted against with being seated 14 rear side inner wall of hole, at this point, the second inserted sheet 140 is inserted completely
Enter in the second inserting-plate hole 641, meanwhile, interior 62 back end surface of rotating cylinder is abutted against with 1 front inner wall of distribution base, meanwhile, pushing block 110
Back end surface is abutted against with 11 rear side inner wall of the first cavity volume, at this point, compression spring 1151 is fully retracted in resettlement groove 115, meanwhile, first
Tooth-like wheel 113 engages connection with the second tooth-like wheel 111, at this point, by motor 114 spline shaft 112 is controlled to rotate, by spline
Shaft 112 drives the spiral shell shape bar 132 on the second tooth-like wheel 111 and the second tooth-like wheel 111 to rotate, and drives spiral shell shape bar 132 and slides
Moving block 134, side is moved backwards along slippage slot 131, until in 13 rear side of 134 back end surface of slipping block as shown in Figure 6 and the second cavity volume
Wall abuts against, meanwhile, the first inserted sheet 133 is fully inserted into the first inserting-plate hole 135, is completed at this time for electrical connection.
The beneficial effects of the invention are as follows：
1. by setting pushing block in the first cavity volume on front side of resettlement groove, set between pushing block back end surface and the resettlement groove
Compression spring, equity sets slide bar in the first cavity volume of compression spring both sides, and slide bar is connected with pushing block sliding, and pushing block front end side, which is set, wears
It crosses distribution base inner wall and into push strut in hole is seated, is all provided with open slot at left and right sides of pushing block in end wall, outside pushing block
Equity sets spline shaft in first cavity volume of side, and spline shaft rear side end is connected with motor, sliding cooperation company in spline shaft
The first tooth-like wheel in open slot is tapped into, the second tooth-like wheel is all provided on the outside of each first tooth-like wheel, by controlling push strut
Cooperation is slid back and forth, so as to which the transmission of the first tooth-like wheel and the second tooth-like wheel be controlled to be connected, operating procedure is reduced, improves work
Make efficiency.
2. by being all provided with slippage slot on the outside of the second cavity volume, the spiral shell shape bar of setting, spiral shell shape bar are stretched after being equipped in the second cavity volume
On set the slipping block of whorl mating connection, on front side of spiral shell shape bar stretch section through distribution base wall body and into the first cavity volume and with
Second tooth-like wheel back end surface is fixedly connected, and so as to fulfill isolating for the first inserted sheet and the first inserting-plate hole, is prevented in swapping process
Because voltage influence generates electric arc, electric shock accidents is prevented.
3. be grouped by being seated portion by bolt, transfer block, interior rotating cylinder and cable, bolt and wears groove opposite side set to
With the second inserting-plate hole of the second inserted sheet cooperation plug connection, the winding of transfer block outer surface sets endless groove, sliding ring is set in endless groove,
Sliding ring is fixedly connected with interior rotating cylinder inwall, and transfer block leaves bolt one side and is fixedly connected with cable, so as to improve for electrical connection
When fastness, prevent that loosening the phenomenon that causing loose contact occurs
4. the configuration of the present invention is simple, easy to operate, stable connection of powering, prevent from generating electric arc during plug, so as to cause touching
Electrification occurs, and improves Supply Security and stability.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, it is of the invention
Protection domain should be determined by the scope of protection defined in the claims.
Claims (2)
1. a kind of welder including distribution base and is seated portion, it is characterised in that：Distribution base is secured by bolts in wall
On, the wall front end face above distribution base is equipped with electric pressure converter, and electric pressure converter is electrically connected by circuit with distribution base, distribution
Seat front end face is equipped with cuter spiral line part, is equipped with wears groove in cuter spiral line part, is equipped in the distribution base on rear side of wears groove and is seated hole, is seated
Inner wall is equipped with the second inserted sheet on rear side of hole, is seated in the distribution base at hole rear and is equipped with the first cavity volume, and inner wall is equipped on rear side of the first cavity volume
Resettlement groove is equipped with pushing block in the first cavity volume on front side of resettlement groove, compression spring, pressure is equipped between pushing block back end surface and resettlement groove
Equity is equipped with slide bar in first cavity volume of spring both sides, and slide bar is connected with pushing block sliding, and pushing block front end side is provided through
Distribution base inner wall is equipped with open slot simultaneously into push strut in hole is seated in end wall at left and right sides of pushing block, outside pushing block
Equity is equipped with spline shaft in first cavity volume of side, and spline shaft rear side end is connected with motor, and cooperation is slid in spline shaft
The first tooth-like wheel being connected with into open slot, each first tooth-like wheel outside are equipped with the second tooth-like wheel, the second tooth-like wheel
The second cavity volume is equipped in the distribution base at rear, slippage slot is equipped on the outside of the second cavity volume, front and rear stretching, extension is equipped in the second cavity volume and is set
The spiral shell shape bar put, spiral shell shape bar are equipped with the slipping block that whorl is connected, and stretch section passes through distribution base wall body on front side of spiral shell shape bar
And be fixedly connected into the first cavity volume and with the second tooth-like wheel back end surface, be seated portion by bolt, transfer block, interior rotating cylinder and
Cable is grouped into；The slipping block outboard end is interior into the slippage slot and sliding is connected, the institute on the inside of the slippage slot
It states and the first inserting-plate hole is equipped in slipping block back end surface, inner wall is equipped with the on rear side of the slippage slot of the first inserting-plate hole opposition
One inserted sheet, first inserting-plate hole are electrically connected with first inserted sheet；The bolt is equipped with and institute with the wears groove opposite side
The second inserting-plate hole of the second inserted sheet cooperation plug connection is stated, transfer block outer surface winding is equipped with endless groove, the endless groove
It is interior be equipped with sliding ring, it is described sliding ring be fixedly connected with the interior rotating cylinder inwall, it is described transfer block leave the bolt one side and
The cable is fixedly connected.
2. a kind of welder according to claim 1, it is characterised in that：The wears groove with it is described be seated hole and communicate set
It puts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710175279.0A CN106825862B (en) | 2017-03-22 | 2017-03-22 | A kind of welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710175279.0A CN106825862B (en) | 2017-03-22 | 2017-03-22 | A kind of welder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106825862A CN106825862A (en) | 2017-06-13 |
| CN106825862B true CN106825862B (en) | 2018-05-18 |
Family
ID=59129369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710175279.0A Active CN106825862B (en) | 2017-03-22 | 2017-03-22 | A kind of welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106825862B (en) |
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| CN107175442A (en) * | 2017-06-14 | 2017-09-19 | 何志达 | A kind of novel welding device |
| CN108199234A (en) * | 2017-06-14 | 2018-06-22 | 泉州东特机械有限公司 | It is a kind of to use easy bridge facility |
| CN107181132A (en) * | 2017-06-14 | 2017-09-19 | 何纪全 | A kind of cup device |
| CN107175392A (en) * | 2017-06-14 | 2017-09-19 | 何志达 | A kind of welder |
| CN107181137A (en) * | 2017-06-14 | 2017-09-19 | 何纪全 | A kind of novel water glass device |
| CN107161809A (en) * | 2017-06-14 | 2017-09-15 | 孙美娟 | A kind of bridge facility |
| CN107181138A (en) * | 2017-06-14 | 2017-09-19 | 孙美娟 | A kind of novel bridge facility |
| CN108098195A (en) * | 2017-06-14 | 2018-06-01 | 泉州市智敏电子科技有限公司 | A kind of modified welder |
| CN108110566A (en) * | 2017-06-14 | 2018-06-01 | 泉州东特机械有限公司 | A kind of improved bridge facility |
| CN107332055A (en) * | 2017-09-04 | 2017-11-07 | 毛林杰 | A kind of novel bridge Architectural Equipment |
| CN107591638A (en) * | 2017-09-04 | 2018-01-16 | 毛林杰 | A kind of bridge construction equipment |
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| CN104953373A (en) * | 2015-05-29 | 2015-09-30 | 杭州涛度电子商务商行 | Rapidly-radiating power supply interface device of power supply equipment |
| CN105006702A (en) * | 2015-07-03 | 2015-10-28 | 舒泳军 | Stable power supply socket |
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| Publication number | Publication date |
|---|---|
| CN106825862A (en) | 2017-06-13 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Yanying Inventor after: Long Sheng Inventor after: Chu Jianyue Inventor before: Jiang Miaohai |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180419 Address after: 313000 Huzhou City, Zhejiang Province, No. three Bridge Road, No. 685 Applicant after: Zhejiang dadongwu Group Steel Co. Ltd. Address before: After the street of Yiwu city in Zhejiang province Jinhua City, more than 322008 village A District 20 building 11, Room 301 Applicant before: YIWU MANWANG MACHINERY EQUIPMENT CO., LTD. |
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| GR01 | Patent grant | ||
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Address after: 313000 No. 685 Sanliqiao Road, Huzhou City, Zhejiang Province Patentee after: Zhejiang Dadong Wuhangxiao Green Construction Technology Co., Ltd. Address before: 313000 No. 685 Sanliqiao Road, Huzhou City, Zhejiang Province Patentee before: Zhejiang dadongwu Group Steel Co. Ltd. |