CN218363042U - Steel construction butt welding adjusting device - Google Patents
Steel construction butt welding adjusting device Download PDFInfo
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- CN218363042U CN218363042U CN202222599916.6U CN202222599916U CN218363042U CN 218363042 U CN218363042 U CN 218363042U CN 202222599916 U CN202222599916 U CN 202222599916U CN 218363042 U CN218363042 U CN 218363042U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 238000003466 welding Methods 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 230000033001 locomotion Effects 0.000 claims abstract description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 20
- 210000001503 joint Anatomy 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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Abstract
The utility model discloses a steel structure butt welding adjusting device, which belongs to the field of steel structure production, and comprises an operation table, the upper surface of the operation table is provided with a driven fluted disc and a driving fluted disc, and the driven fluted disc and the driving fluted disc are matched for use, the driving fluted disc is rotatably installed on the upper surface of the operation table, the driven fluted disc is movably arranged on the upper surface of the operation table, a second motor is fixedly installed on the lower surface of the operation table, the output shaft of the second motor is fixedly connected with the central shaft of the driving fluted disc, and installation frames are fixedly installed on the upper surfaces of the driven fluted disc and the driving fluted disc; through setting up pinion rack and fan-shaped tooth piece, cylinder piston end drive pinion rack up-and-down motion, the pinion rack makes fan-shaped tooth piece rotate simultaneously for distance increase or reduction between two splint accomplish the centre gripping operation to steel construction component, remove the operation personnel from and hold up the operation, stability when improving the welding.
Description
Technical Field
The utility model belongs to the technical field of steel construction production, concretely relates to steel construction butt welding adjusting device.
Background
The steel structure dead weight is lighter, and the construction is simple and convenient, and the wide application is in fields such as large-scale factory building, venue, super high-rise, and the butt joint node of steel construction is crucial, will adopt appropriate connected mode, makes node design and structural calculation simplify the model unanimous. Most of the prior structural damage occurs in the nodes, so the nodes are elaborately designed and constructed, an advanced and reliable connecting method is preferentially adopted, the welding positions are usually column-column transverse welding, column-beam flat welding (including truss beam upper and lower flange flat welding), T-shaped angle vertical welding, and the form and the size of the groove are designed according to the requirements.
When the existing steel structure construction process is used for butt welding of a steel structure, a large number of steel members with included angles need to be welded, the angles of two sections of steel beams need to be adjusted during butt welding, manual adjustment is often performed by operating personnel, the stability during welding cannot be guaranteed by one of the steel members, the two welding angles cannot be accurately controlled, the angles are not uniform, and the production quality of the steel structure is greatly influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steel construction butt welding adjusting device to solve current steel mechanism construction technology when carrying out steel construction butt welding, need a large amount of welding steel member that have the contained angle, need adjust the angle of two sections girder steels when the butt joint, often carry out manual adjustment by the operating personnel, stability when its one is difficult to guarantee the welding, its two welding angles are difficult to accurate control, and then lead to the angle non-uniform, very big influence steel construction production quality's problem.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a steel construction butt welding adjusting device, includes the operation panel, the operation panel upper surface is provided with the cooperation between driven fluted disc and the initiative fluted disc and uses, the initiative fluted disc rotates and installs at the operation panel upper surface, the activity of driven fluted disc sets up the upper surface at the operation panel, fixed surface installs motor two under the operation panel, the output shaft of motor two and the center pin fixed connection of initiative fluted disc, the equal fixed mounting in driven fluted disc and the initiative fluted disc upper surface has the installing frame, fixed surface installs the cylinder on the installing frame, cylinder piston end fixed mounting has the pinion rack, articulated installing two connecting rod one and two connecting rod opposite face equal fixed mounting have fan-shaped tooth piece, two in the installing frame fan-shaped tooth piece is located pinion rack both sides and two fan-shaped tooth pieces respectively with pinion rack both sides face meshing, connecting rod one bottom articulates there is connecting rod three, the one end fixed mounting of connecting rod three has splint and keeps away from splint has articulated connecting rod two, the one end that connecting rod three articulates the connecting rod one end articulates the installing frame inner wall, be equipped with driven fluted disc in the operation panel and order to make the sliding mechanism of driving fluted disc and driven fluted disc separation.
By adopting the scheme, the toothed plate and the fan-shaped toothed block are arranged, the piston end of the cylinder drives the toothed plate to move up and down, and the toothed plate simultaneously enables the fan-shaped toothed block to rotate, so that the distance between the two clamping plates is increased or reduced, the clamping operation of the steel structure assembly is completed, the holding operation of an operator is omitted, and the stability during welding is improved; through setting up motor two, make driven gear and driving gear relative rotation, can be convenient to the accurate adjustment of butt joint angle between the steel construction assembly, convenient operation, angle error reduces when making the butt joint, and then improve steel construction production quality, through setting up slide mechanism, slide mounting board slidable mounting is in lining up the inside and driven fluted disc rotation of spout and is installed at the slide mounting board upper surface, when slide mounting board is gliding, hold-in range action driven fluted disc side to side movement, make the separation of driving fluted disc and driven fluted disc, realize the independent rotation of driving fluted disc, thereby make the better adaptation multi-angle butt joint adjustment operation of the device, improve the device's suitability.
In the above scheme, it should be noted that the first motor, the second motor and the cylinder are all electrically connected to an external power supply.
As a preferred embodiment, the sliding mechanism includes a sliding mounting plate, a through chute is formed in the operating platform, the sliding mounting plate is slidably mounted in the through chute, and a driving mechanism for driving the sliding mounting plate to slide is arranged on the operating platform.
Adopt above-mentioned scheme, through setting up slide mechanism, slide mounting board slidable mounting link up inside and driven fluted disc rotation of spout and install at the slide mounting board upper surface for when slide mounting board is gliding, the synchronous motion is followed the fluted disc, and then has made driven fluted disc and driven fluted disc separation, realizes the independent rotation of driving fluted disc, thereby makes the better adaptation multi-angle butt joint adjustment operation of the device, improves the device's suitability.
As a preferred embodiment, actuating mechanism includes screw rod, driven sprocket, chain and drive sprocket, the quantity of screw rod is two and two screw rods and all rotates to install and link up the spout inner wall, the surface at two screw rods is installed to the sliding mounting board screw thread, screw rod one end is run through and is extended operation panel and driven sprocket and fix the tip at the screw rod, the side of operation panel is fixed with the protecting crust that the cover was established at driven sprocket and drive sprocket outside, the inner wall of protecting crust is fixed with motor one, drive sprocket fixes at a motor output shaft surface, connect through chain drive between drive sprocket and two driven sprocket.
By adopting the scheme, the motor drives the driving chain wheel to rotate through the driving mechanism, the driving chain wheel synchronously drives the two driven chain wheels to rotate through the chain, so that the two screw rods synchronously rotate, the sliding mounting plate can relatively slide in the through sliding groove, and the separation operation of the driving fluted disc and the driven fluted disc is realized.
In a preferred embodiment, a rack is fixedly mounted on a side of the upper surface of the operating platform, which is away from the driving fluted disc, and the rack is used with the driven fluted disc.
Adopt above-mentioned scheme, the tooth draw-in bar is installed at the operation panel upper surface and is located the one side of keeping away from the driving fluted disc, and driven fluted disc removes to keeping away from the driving fluted disc direction, and final driven fluted disc side is laminated with the tooth draw-in bar inner wall mutually, realizes that driven fluted disc breaks away from the angle locking of driving fluted disc, improves the stability of the device during operation.
As a preferred embodiment, sliding seats are fixedly mounted on the upper surfaces of the driven fluted disc and the driving fluted disc, a plurality of grooves are formed in the upper surface of each sliding seat, and rolling shafts are rotatably mounted in the grooves.
By adopting the scheme, the slide seats are arranged on the upper surfaces of the driven fluted disc and the driving fluted disc, and the rolling shafts are arranged in the grooves of the slide seats, so that the steel structure component is more labor-saving and convenient when being adjusted and moved on the driven fluted disc and the driving fluted disc, and the usability of the device is further improved.
As a preferred embodiment, a stabilizing ring is fixedly mounted on the lower surfaces of the driving fluted disc and the driven fluted disc, a stabilizing groove is formed in each of the upper surface of the operating platform and the upper surface of the sliding mounting plate, and an inner wall of the stabilizing groove is rotatably mounted on the stabilizing ring.
By adopting the scheme, the stabilizing ring is arranged, when the driven fluted disc and the driving fluted disc rotate, the stabilizing ring rotates and is arranged on the inner wall of the stabilizing groove, the rotating stability of the driven fluted disc and the driving fluted disc is improved, the driven fluted disc and the driving fluted disc are enabled to keep horizontal rotation, the butt joint adjustment precision of the device is further improved, and the production quality of a steel structure is further improved.
Compared with the prior art, the beneficial effects of the utility model are that:
according to the steel structure butt welding adjusting device, the toothed plate and the fan-shaped toothed block are arranged, the piston end of the air cylinder drives the toothed plate to move up and down, and the toothed plate simultaneously enables the fan-shaped toothed block to rotate, so that the distance between the two clamping plates is increased or reduced, clamping operation on a steel structure assembly is completed, manual operation of operating personnel is omitted, and the stability during welding is improved; by arranging the second motor, the driven gear and the driving gear relatively rotate, the butt joint angle between the steel structure components can be conveniently and accurately adjusted, the operation is convenient, the angle error during butt joint is reduced, and the production quality of a steel structure is further improved;
according to the steel structure butt welding adjusting device, the sliding mechanism is arranged, the sliding mounting plate is slidably mounted inside the through sliding groove, the driven fluted disc is rotatably mounted on the upper surface of the sliding mounting plate, and the driven fluted disc is synchronously driven to move left and right while the sliding mounting plate slides, so that the driving fluted disc is separated from the driven fluted disc, and the independent rotation of the driving fluted disc is realized, so that the device is better suitable for multi-angle butt welding adjusting operation, and the applicability of the device is improved;
this steel construction butt welding adjusting device is through setting up actuating mechanism, and the motor drives drive sprocket and rotates, and drive sprocket passes through two driven sprocket rotations of chain synchronous drive for two screw rods rotate in step, thereby the relative slip in the sliding mounting board can link up the spout, realizes the separation operation of driving fluted disc and driven fluted disc.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a left side view schematic structure diagram of the present invention;
fig. 3 is a side view schematic structure diagram of the present invention;
FIG. 4 is a schematic diagram of the explosion structure of the stabilizer ring of the present invention;
fig. 5 is a schematic structural diagram of the driving mechanism of the present invention.
In the figure: 1. an operation table; 2. installing a frame; 3. a slide base; 4. a roller; 5. a driving fluted disc; 6. a driven fluted disc; 7. a slide mounting plate; 8. a first connecting rod; 9. a toothed plate; 10. a second connecting rod; 11. a sector-shaped tooth block; 12. a cylinder; 13. a third connecting rod; 14. a splint; 15. a tooth clamping strip; 16. a first motor; 17. a protective shell; 18. a second motor; 19. a drive sprocket; 20. a driven sprocket; 21. a chain; 22. a stabilizing slot; 23. a stabilizing ring; 24. a screw.
Detailed Description
Please refer to fig. 1-5, the utility model provides a steel structure butt welding adjusting device, including operation panel 1, 1 upper surface of operation panel is provided with driven fluted disc 6 and drive fluted disc 5 and uses between driven fluted disc 6 and the drive fluted disc 5 in cooperation, drive fluted disc 5 rotates and installs on 1 upper surface of operation panel, the activity of driven fluted disc 6 sets up the upper surface at operation panel 1, driven fluted disc 6 and drive fluted disc 5 upper surface all fixed mounting have slide 3, the upper surface of slide 3 has been seted up a plurality of recesses, the internal rotation of recess is installed and is rolled shaft 4, through at driven fluted disc 6 and drive fluted disc 5 upper surface mounting slide 3, and install roller shaft 4 in slide 3 recess, when making steel structure subassembly adjust the removal on driven fluted disc 6 and drive fluted disc 5, it is more laborsaving and convenient, and further promote the ease of use of the device;
a second motor 18 is fixedly mounted on the lower surface of the operating platform 1, an output shaft of the second motor 18 is fixedly connected with a central shaft of the driving toothed disc 5, a mounting frame 2 is fixedly mounted on the upper surfaces of the driven toothed disc 6 and the driving toothed disc 5, an air cylinder 12 is fixedly mounted on the upper surface of the mounting frame 2, a toothed plate 9 is fixedly mounted on a piston end of the air cylinder 12, two first connecting rods 8 are hinged in the mounting frame 2, fan-shaped toothed blocks 11 are fixedly mounted on opposite surfaces of the two first connecting rods 8, the two fan-shaped toothed blocks 11 are respectively located on two sides of the toothed plate 9, the two fan-shaped toothed blocks 11 are respectively meshed with two side surfaces of the toothed plate 9, a third connecting rod 13 is hinged at the bottom of the first connecting rod 8, a clamping plate 14 is fixedly mounted at one end of the third connecting rod 13, a second connecting rod 10 is hinged at one end far away from the clamping plate 14, and one end of the second connecting rod 10 far away from the third connecting rod 13 is hinged on the inner wall of the mounting frame 2;
a sliding mechanism for driving the driven fluted disc 6 to separate the driving fluted disc 5 from the driven fluted disc 6 is arranged in the operating platform 1, the sliding mechanism comprises a sliding mounting plate 7, a through chute is formed in the operating platform 1, the sliding mounting plate 7 is slidably mounted in the through chute, and the driven fluted disc 6 is rotatably mounted on the upper surface of the sliding mounting plate 7 by arranging the sliding mechanism, so that the driven fluted disc 6 is synchronously driven while the sliding mounting plate 7 slides, the driving fluted disc 5 is separated from the driven fluted disc 6, and the driving fluted disc 5 is independently rotated, so that the device is better suitable for multi-angle butt joint adjustment operation, and the applicability of the device is improved;
the operating platform 1 is provided with a driving mechanism for driving the sliding mounting plate 7 to slide, the driving mechanism comprises two screws 24, driven sprockets 20, a chain 21 and a driving sprocket 19, the number of the screws 24 is two, the two screws 24 are rotatably mounted on the inner wall of the through chute, the sliding mounting plate 7 is mounted on the outer surfaces of the two screws 24 in a threaded manner, one end of each screw 24 penetrates through and extends out of the operating platform 1, the driven sprockets 20 are fixed at the end parts of the screws 24, a protective shell 17 covering the driven sprockets 20 and the driving sprocket 19 is fixed on the side surface of the operating platform 1, a first motor 16 is fixed on the inner wall of the protective shell 17, the driving sprocket 19 is fixed on the outer surface of an output shaft of the first motor 16, the driving sprocket 19 and the two driven sprockets 20 are in transmission connection through the chain 21, the first motor 16 drives the driving sprocket 19 to rotate, the driving sprocket 19 synchronously drives the two driven sprockets 20 to rotate through the chain 21, so that the two screws 24 synchronously rotate, the sliding mounting plate 7 can relatively slide in the through chute, and the separation operation of the driving fluted disc 5 and the driven fluted disc 6 is realized;
a toothed clamping strip 15 is fixedly mounted on one side, far away from the driving fluted disc 5, of the upper surface of the operating platform 1, the toothed clamping strip 15 is matched with the driven fluted disc 6 for use, the toothed clamping strip 15 is mounted on the upper surface of the operating platform 1 and located on one side, far away from the driving fluted disc 5, the driven fluted disc 6 moves towards the direction far away from the driving fluted disc 5, finally, the side surface of the driven fluted disc 6 is attached to the inner wall of the toothed clamping strip 15, the angle locking of the driven fluted disc 6 separated from the driving fluted disc 5 is realized, and the working stability of the device is improved;
equal fixed mounting in driving fluted disc 5 and the 6 lower surfaces of driven fluted disc has stabilizing ring 23, stabilizing ring 22 has all been seted up to 1 upper surface of operation panel and 7 upper surfaces of sliding mounting board, stabilizing ring 23 rotates installs the inner wall of stabilizing ring 22, through setting up stabilizing ring 23, in driven fluted disc 6 and the 5 pivoted of driving fluted disc, stabilizing ring 23 rotates the inner wall of installing at stabilizing ring 22, improve driven fluted disc 6 and the 5 pivoted stability of driving fluted disc, make driven fluted disc 6 and driving fluted disc 5 keep the level to rotate, and then improve the device's butt joint adjustment precision, and further improve steel construction production quality.
The working principle is as follows: when the adjusting device for butt welding of the steel structure is used, steel structure components needing butt welding are respectively placed on the upper surfaces of a driving toothed disc 5 and a driven toothed disc 6, the steel structure components slide on the outer surfaces of rolling shafts 4 in sliding seats 3, so that the steel structure components are pushed to be more labor-saving and convenient to operate, an air cylinder 12 is started to drive the toothed plate 9 to move upwards, fan-shaped toothed blocks 11 meshed with the two sides of the toothed plate 9 synchronously rotate, a connecting rod I8 fixed with the fan-shaped toothed blocks 11 rotates along the direction of a hinged shaft of an installation frame 2, the distance between two clamping plates 14 is reduced, the clamping operation of the steel structure components on the upper surfaces of the driven toothed disc 6 and the driving toothed disc 5 is completed, the holding operation of operators is omitted, the stability during welding is further improved, when the butt joint angle needs to be adjusted, a motor II 18 is started to drive the driving toothed disc 5 to rotate, the driving toothed disc 5 synchronously rotates the driven toothed disc 6 meshed with the driving toothed disc 5, when the driving fluted disc 5 needs to rotate independently, the first motor 16 drives the driving sprocket 19 to rotate, the driving sprocket 19 drives the two driven sprockets 20 to rotate synchronously through the chain 21, so that the two screws 24 rotate synchronously, the sliding mounting plate 7 can slide relatively in the through chutes, the separation operation of the driving fluted disc 5 and the driven fluted disc 6 is realized, when the sliding mounting plate 7 slides to one side far away from the driving fluted disc 5, the side surface of the driven fluted disc 6 is attached to the inside of the tooth clamping strip 15, the angle locking of the driven fluted disc 6 is realized, the independent rotation of the driving fluted disc 5 is realized, and the device is better suitable for multi-angle butt joint adjustment operation, the suitability of the refitting is further improved.
Claims (6)
1. The utility model provides a steel construction butt joint welding adjusting device, a serial communication port, including operation panel (1), operation panel (1) upper surface is provided with driven fluted disc (6) and driving fluted disc (5) and the cooperation is used between driven fluted disc (6) and driving fluted disc (5), driving fluted disc (5) rotate and install at operation panel (1) upper surface, driven fluted disc (6) activity sets up the upper surface at operation panel (1), fixed surface installs motor two (18) under operation panel (1), the output shaft of motor two (18) and the center pin fixed connection of driving fluted disc (5), driven fluted disc (6) and driving fluted disc (5) upper surface equal fixed mounting has installing frame (2), fixed surface installs cylinder (12) on installing frame (2), cylinder (12) piston mounting has fixed tooth board (9), articulated installing in installing frame (2) two connecting rod one (8) and two connecting rod one (8) opposite face equal fixed mounting have fan-shaped tooth piece (11), two fan-shaped tooth piece (11) and three fixed splint (13) one end splint (9) and one end fixed splint (14) are located respectively and fan-shaped connecting rod (9) one side splint (13) one end both sides are articulated to have fan-shaped splint (13) one side splint (13) and one side splint (13) respectively The end articulates there is connecting rod two (10), the one end that connecting rod three (13) were kept away from in connecting rod two (10) articulates at installing frame (2) inner wall, be equipped with in operation panel (1) and order about the sliding mechanism of driven fluted disc (6) motion so that initiative fluted disc (5) and driven fluted disc (6) separation.
2. The adjusting device for butt welding of the steel structure according to claim 1, wherein the sliding mechanism comprises a sliding mounting plate (7), a through chute is formed in the operating platform (1), the sliding mounting plate (7) is slidably mounted in the through chute, and a driving mechanism for driving the sliding mounting plate (7) to slide is arranged on the operating platform (1).
3. The adjusting device for the butt welding of the steel structure according to claim 2, wherein the driving mechanism comprises two screws (24), a driven sprocket (20), a chain (21) and a driving sprocket (19), the two screws (24) are both rotatably mounted on the inner wall of the through chute, the sliding mounting plate (7) is mounted on the outer surfaces of the two screws (24) in a threaded manner, one end of each screw (24) penetrates through and extends out of the operating platform (1), the driven sprocket (20) is fixed to the end portion of each screw (24), a protective shell (17) covering the outer portions of the driven sprocket (20) and the driving sprocket (19) is fixed to the side surface of the operating platform (1), a first motor (16) is fixed to the inner wall of the protective shell (17), the driving sprocket (19) is fixed to the outer surface of an output shaft of the first motor (16), and the driving sprocket (19) is in transmission connection with the two driven sprockets (20) through the chain (21).
4. The adjusting device for the butt welding of the steel structure according to claim 2, wherein a tooth clamping bar (15) is fixedly mounted on one side of the upper surface of the operating platform (1) far away from the driving fluted disc (5), and the tooth clamping bar (15) is used with the driven fluted disc (6) in a matching manner.
5. The adjusting device for the butt welding of the steel structure according to claim 1, wherein sliding bases (3) are fixedly mounted on the upper surfaces of the driven fluted disc (6) and the driving fluted disc (5), a plurality of grooves are formed in the upper surface of each sliding base (3), and rollers (4) are rotatably mounted in the grooves.
6. The adjusting device for the butt welding of the steel structure according to claim 1, wherein a stabilizing ring (23) is fixedly mounted on the lower surfaces of the driving fluted disc (5) and the driven fluted disc (6), a stabilizing groove (22) is formed in each of the upper surface of the operating platform (1) and the upper surface of the sliding mounting plate (7), and the inner wall of the stabilizing groove (22) is rotatably mounted on the stabilizing ring (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222599916.6U CN218363042U (en) | 2022-09-30 | 2022-09-30 | Steel construction butt welding adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222599916.6U CN218363042U (en) | 2022-09-30 | 2022-09-30 | Steel construction butt welding adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218363042U true CN218363042U (en) | 2023-01-24 |
Family
ID=84956180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222599916.6U Active CN218363042U (en) | 2022-09-30 | 2022-09-30 | Steel construction butt welding adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218363042U (en) |
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2022
- 2022-09-30 CN CN202222599916.6U patent/CN218363042U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20231106 Address after: 472000 Yuwang Road West, Industrial Agglomeration Zone, Sanmenxia City, Henan Province Patentee after: Henan West Baofeng Construction Technology Co.,Ltd. Address before: 431800 Hubei Hongze Yulong Steel Structure Engineering Co.,Ltd., Small and Micro Entrepreneurship Park, Jingshan Economic Development Zone, Jingmen City, Hubei Province Patentee before: Hubei Hongze Yulong Steel Structure Engineering Co.,Ltd. |