CN114393815B - Interface expansion device for PVC pipeline production - Google Patents
Interface expansion device for PVC pipeline production Download PDFInfo
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- CN114393815B CN114393815B CN202210152702.6A CN202210152702A CN114393815B CN 114393815 B CN114393815 B CN 114393815B CN 202210152702 A CN202210152702 A CN 202210152702A CN 114393815 B CN114393815 B CN 114393815B
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- extrusion
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- power
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 96
- 238000005452 bending Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 16
- 239000004800 polyvinyl chloride Substances 0.000 description 16
- 208000032820 Ring chromosome 13 syndrome Diseases 0.000 description 8
- 208000032836 Ring chromosome 15 syndrome Diseases 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 208000032822 Ring chromosome 11 syndrome Diseases 0.000 description 4
- 208000035209 Ring chromosome 17 syndrome Diseases 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 2
- 208000035480 Ring chromosome 8 syndrome Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides an interface expanding device for PVC pipeline production, and relates to the field of PVC pipelines. This interface expansion device is used in PVC pipeline production, including power shell, power shell inboard fixedly connected with power motor, power motor output fixedly connected with power shaft, power shaft middle section fixedly connected with promotes the tooth, promotes tooth surface engagement and has the flitch, and flitch outside sliding connection has the restriction piece, restriction piece and power shell fixedly connected with switching tooth. This interface expansion device is used in PVC pipeline production is close to extrusion board each other through first extrusion ring and second extrusion ring, makes the crooked pipeline inner wall expansion that promotes of extrusion board, adjusts the crooked degree of extrusion board through the distance between first extrusion ring and the second extrusion ring of control, makes the crooked radian of extrusion board can reach different diameters, has reached the effect of arbitrary adjustment pipeline interface expansion ring diameter, has solved the pipeline of different diameters and has needed the problem of different expansion device.
Description
Technical Field
The invention relates to the field of PVC (polyvinyl chloride) pipelines, in particular to an interface expanding device for PVC pipeline production.
Background
PVC is a material which is mainly composed of polyvinyl chloride and is added with other components to increase heat resistance, toughness and ductility, and is widely applied in the world today, wherein PVC pipelines are commonly used in all places, kitchens and bathrooms, public facilities and even factories.
When producing the PVC pipeline that the diameter is great, can set up the ring that swells in smooth pipeline port department to installation and butt joint, but according to pipeline diameter difference ring diameter also different, consequently same equipment can't produce the pipeline of different diameters, has designed an interface expansion device for PVC pipeline production for this reason.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the interface expansion device for PVC pipeline production, which solves the problems that pipelines with different diameters need different expansion devices, the expansion of the pipelines is easy to crack, and the devices stably expand the pipelines.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a PVC is interface expansion device for pipeline production, which comprises a power shell, the inboard fixedly connected with power motor of power shell, power motor output fixedly connected with power shaft, power shaft middle section fixedly connected with promotes the tooth, promote tooth surface engagement and have the pushing plate, pushing plate outside sliding connection has the restriction piece, restriction piece and power shell fixed connection, power shaft surface fixedly connected with switching tooth, power shell outside fixedly connected with heating ring, the inboard fixedly connected with bending motor of power shell, bending motor output fixedly connected with dislocation axle, dislocation axle one side meshing that is kept away from each other has the pinion rack, go up pinion rack and power shell sliding connection, go up pinion rack lower extreme fixedly connected with lower clamping ring, one side meshing that dislocation axle is close to each other is connected with down the pinion rack, lower pinion rack and power shell sliding connection, lower pinion rack lower extreme fixedly connected with go up the lifting ring, top lifting ring surface fixedly connected with filling plate and lower clamping ring fixed connection, pushing plate and filling plate contact, the one end meshing that the power motor is close to the power shaft has first extrusion ring, the one end fixedly connected with extrusion plate of first extrusion ring keeps away from the power motor, extrusion plate is kept away from first extrusion link rod fixedly connected with extrusion tooth, extrusion link rod and second extrusion link rod fixedly connected with extrusion tooth, extrusion tooth and outer surface joint push rod has the push rod, extrusion tooth is connected with the push rod, the outer surface of extrusion tooth is connected with the extrusion tooth, push rod is connected with the extrusion tooth, the push rod is connected with the extrusion tooth, push rod.
Preferably, the power shaft comprises three sections, the two ends of the power shaft are respectively provided with a section of threaded rod, the threaded directions of the two sections of threaded rods are opposite, the threaded rods at the two ends are fixedly connected through the round rod, and the pushing teeth and the switching teeth are fixed on the surface of the round rod.
Preferably, the upper lifting ring consists of a circular ring and arc plates, the inner side of the circular ring is fixedly connected with three arc plates, one ends of the arc plates, which are close to each other, are fixedly connected with the lower toothed plate, and the push rod is fixedly connected to the surface of the arc plates.
Preferably, the first extrusion ring comprises set square and sleeve, and the screw hole is offered at the set square center, and the screw hole meshes with the power shaft, and set square outside fixedly connected with sleeve, sleeve keep away from the one end fixedly connected with arc of set square, extrusion plate and arc fixed connection.
Preferably, the shape of the extrusion teeth is a cylinder, a through hole is formed in the center of the cylinder, the power shaft penetrates through the through hole, teeth are formed in the upper ends of the extrusion teeth, teeth are formed in the outer surfaces of the extrusion teeth, and an annular sliding groove is formed in the lower ends of the extrusion teeth.
Preferably, the upper end of the connecting rod is an L-shaped long rod, the top end of the long rod is in sliding connection with the extrusion teeth, one end of the long rod, which is far away from the extrusion teeth, is fixedly connected with a cylinder, the extrusion spring is arranged in the cylinder, and the push rod is in sliding connection with the cylinder.
Compared with the prior art, the invention has the following beneficial effects:
1. this interface expansion device is used in PVC pipeline production is close to extrusion board each other through first extrusion ring and second extrusion ring, makes the crooked pipeline inner wall expansion that promotes of extrusion board, adjusts the crooked degree of extrusion board through the distance between first extrusion ring and the second extrusion ring of control, makes the crooked radian of extrusion board can reach different diameters, has reached the effect of arbitrary adjustment pipeline interface expansion ring diameter, has solved the pipeline of different diameters and has needed the problem of different expansion device.
2. This interface expansion device is used in PVC pipeline production fills extrusion plate gap clearance through the stripper plate to the pipeline expansion, can expand gradually when making the pipeline expand and place the pipeline and split, independently expand the pipeline through stripper plate and filler plate, makes the pipeline expand gradually when expanding, has reached the effect of expanding the pipeline gradually, has solved the problem that the pipeline expansion is easy to fracture.
3. This interface expansion device is used in PVC pipeline production drives the push plate and push out the position that board control stripper plate and filler plate swell in the time of compressing the stripper plate through the power shaft rotation, makes stripper plate and filler plate swell the position can be on unified horizon, promotes stripper plate and filler plate through utilizing push plate and push out the board, makes stripper plate and filler plate have clear crooked direction when receiving the extrusion, has reached the effect of control crooked direction, has solved the stable problem of expanding the pipeline of device.
Drawings
FIG. 1 is a schematic view of the inner side structure of a heating ring according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of the present invention;
FIG. 3 is a schematic view of a packing plate structure of the present invention;
FIG. 4 is a schematic view of the structure of the squeeze plate of the present invention;
FIG. 5 is a schematic view of the power shaft structure of the present invention;
FIG. 6 is a schematic view of a connecting rod structure according to the present invention.
The device comprises a power shell-1, a power motor-2, a power shaft-3, pushing teeth-4, a pushing plate-5, a limiting block-6, a switching tooth-7, a heating ring-8, a dislocation shaft-9, an upper toothed plate-10, a lower pressing ring-11, a lower toothed plate-12, an upper lifting ring-13, a filling plate-14, a first pressing ring-15, a pressing plate-16, a second pressing ring-17, a pressing tooth-18, an pushing plate-19, a connecting rod-20, a pressing spring-21, a push rod-22 and a bending motor-23.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-6, an interface expanding device for PVC pipe production comprises a power shell 1, a power motor 2 is fixedly connected to the inner side of the power shell 1, a power shaft 3 is fixedly connected to the output end of the power motor 2, a pushing tooth 4 is fixedly connected to the middle section of the power shaft 3, a pushing plate 5 is meshed to the surface of the pushing tooth 4, a limiting block 6 is slidably connected to the outer side of the pushing plate 5, the limiting block 6 is fixedly connected with the power shell 1, the upper end of the limiting block 6 is fixedly connected with the power shell 1 through a thin rod, the thin rod penetrates through an upper end mechanism of the limiting block 6, a transfer tooth 7 is fixedly connected to the surface of the power shaft 3, the power shaft 3 is composed of three sections, two sections of threaded rods are respectively arranged at two ends of the power shaft 3, the two sections of threaded rods are opposite in thread direction, the two ends of the threaded rods are fixedly connected through round rods, the pushing tooth 4 and the transfer tooth 7 are fixed on the surface of the round rod, and the power shaft 3 can drive the two end mechanisms to move in different directions when rotating, and can provide rotary power for the pushing tooth 4 and the transfer tooth 7.
The power shell 1 outside fixedly connected with heating ring 8, the inboard fixedly connected with bending motor 23 of power shell 1, bending motor 23 output fixedly connected with dislocation axle 9, dislocation axle 9 is mutual one side meshing that keeps away from has upper toothed plate 10, upper toothed plate 10 and power shell 1 sliding connection, upper toothed plate 10 lower extreme fixedly connected with lower clamping ring 11, dislocation axle 9 is mutual one side meshing connection that is close to down toothed plate 12, the tooth has been seted up to one side that keeps away from each other of lower toothed plate 12, lower toothed plate 12 lower extreme sets up in the square groove, push plate 5 passes from the square inslot, lower toothed plate 12 and power shell 1 sliding connection, lower toothed plate 12 lower extreme fixedly connected with goes up lifting ring 13, go up lifting ring 13 fixed surface and be connected with filling plate 14, filling plate 14 and lower clamping ring 11 fixed connection, push plate 5 and filling plate 14 contact, the one end meshing that power axle 3 is close to power motor 2 has first extrusion ring 15, one end fixedly connected with extrusion plate 16 that first extrusion ring 15 kept away from power motor 2, first extrusion ring 15 comprises set-square and sleeve, the screw hole center has been seted up, set-up the screw hole and set-up screw hole 3 has a set-up extrusion ring 16, set-up the fixed connection power ring 16 is kept away from in the outside fixed connection with the set-top plate, the set-down arc 16 can drive the fixed connection power ring, the set-up extrusion ring 16 is kept away from the fixed connection.
One end of the extrusion plate 16, which is far away from the first extrusion ring 15, is fixedly connected with a second extrusion ring 17, the second extrusion ring 17 is meshed with the power shaft 3, extrusion teeth 18 are sleeved on the surface of the power shaft 3, the extrusion teeth 18 are meshed with the switching teeth 7, an outer pushing plate 19 is meshed on the outer surface of the extrusion teeth 18, the extrusion teeth 18 are cylindrical in shape, a through hole is formed in the center of the cylinder, the power shaft 3 penetrates through the through hole, teeth are formed in the upper end of the extrusion teeth 18, teeth are formed in the outer surface of the extrusion teeth 18, an annular sliding groove is formed in the lower end of the extrusion teeth 18, and the extrusion teeth 18 can be meshed and separated with the switching teeth 7 by pushing of a lower device.
The outer push plate 19 is in sliding connection with the limiting block 6, the outer push plate 19 is in contact with the extruding plate 16, the lower end of the extruding tooth 18 is in sliding connection with a connecting rod 20, an extruding spring 21 is placed in an inner groove of the connecting rod 20, a push rod 22 is arranged in an inner groove of the connecting rod 20 in a sliding mode, the upper lifting ring 13 is composed of a circular ring and an arc plate, three arc plates are fixedly connected to the inner side of the circular ring, one ends, close to each other, of the arc plates are fixedly connected with the lower toothed plate 12, the push rod 22 is fixedly connected to the surface of the arc plate, the upper lifting ring 13 can extrude the filling plate 14 under the driving of the lower toothed plate 12, and the push rod 22 can be driven to ascend.
The push rod 22 contacts with the extrusion spring 21, the push rod 22 is fixedly connected with the upper lifting ring 13, the upper end of the connecting rod 20 is an L-shaped long rod, the top end of the long rod is slidably connected with the extrusion teeth 18, one end of the long rod, which is far away from the extrusion teeth 18, is fixedly connected with a cylinder, the extrusion spring 21 is arranged in the cylinder, the push rod 22 is slidably connected with the cylinder, the connecting rod 20 can push the extrusion teeth 18 to be meshed with the switching teeth 7, and the connecting rod 20 penetrates through a groove in the lower end of the lower toothed plate 12.
When the device is used, firstly, the PVC pipe orifice is placed into the device, the heating ring 8 is used for heating the pipe wall, after the heating is completed, the power motor 2 is started to drive the power shaft 3 to rotate, the power shaft 3 drives the first extrusion ring 15 and the second extrusion ring 17 to mutually approach to the extrusion plate 16 when rotating, the power shaft 3 drives the pushing teeth 4 to rotate, the pushing teeth 4 drive the pushing plate 5 to push the extrusion plate 16 in the limiting block 6, the extrusion plate 16 is outwards expanded, the bending motor 23 is started to drive the dislocation shaft 9 to rotate, the lower toothed plate 12 extrudes the filling plate 14 downwards through the lower compression ring 11, the upper toothed plate 10 extrudes the filling plate 14 through the upper lifting ring 13, the upper lifting ring 13 pushes the connecting rod 20 through the push rod 22 after the filling plate 14 is stressed to bend, the extrusion teeth 18 are meshed with the switching teeth 7, the extrusion teeth 18 rotate to drive the outer push plate 19, and the push plate 19 pushes the filling plate 14, so that the bending positions of the filling plate 14 and the extrusion plate 16 are identical.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a PVC is interface expansion device for pipeline production, includes power shell (1), its characterized in that: the utility model is characterized in that a power motor (2) is fixedly connected to the inner side of the power shell (1), the output end of the power motor (2) is fixedly connected with a power shaft (3), a pushing tooth (4) is fixedly connected to the middle section of the power shaft (3), a pushing plate (5) is meshed with the surface of the pushing tooth (4), a limiting block (6) is connected to the outer side of the pushing plate (5) in a sliding manner, the limiting block (6) is fixedly connected with the power shell (1), a switching tooth (7) is fixedly connected to the surface of the power shaft (3), a heating ring (8) is fixedly connected to the outer side of the power shell (1), a bending motor (23) is fixedly connected to the inner side of the power shell (1), a dislocation shaft (9) is fixedly connected to the output end of the bending motor, an upper toothed plate (10) is meshed to one side, which is far away from each other, of the upper toothed plate (10) is connected with the power shell (1) in a sliding manner, a lower pressing ring (11) is fixedly connected to the lower end of the dislocation shaft (9), a lower toothed plate (12) is meshed to one side, which is close to each other, the lower toothed plate (12) is connected to the power shell (1) in a sliding manner, the lower toothed plate (12) is fixedly connected to the lower toothed plate (13) with the upper lifting ring (14) and the upper end of the upper toothed plate (14) is fixedly connected to the lower toothed plate (14), the pushing plate (5) is contacted with the filling plate (14);
one end meshing that power shaft (3) is close to power motor (2) has first extrusion ring (15), one end fixedly connected with extrusion board (16) that power motor (2) was kept away from to first extrusion ring (15), one end fixedly connected with second extrusion ring (17) that first extrusion ring (15) was kept away from to extrusion board (16), second extrusion ring (17) and power shaft (3) meshing, extrusion tooth (18) have been cup jointed on power shaft (3) surface, extrusion tooth (18) and switching tooth (7) meshing, extrusion tooth (18) surface meshing has push plate (19), push plate (19) and limiting block (6) sliding connection, push plate (19) contact with extrusion board (16), extrusion tooth (18) lower extreme sliding connection has connecting rod (20), extrusion spring (21) have been placed to connecting rod (20) inside groove, push rod (22) and extrusion spring (21) contact, push rod (22) and last bail (13) fixed connection.
2. The interface expansion device for PVC pipe production according to claim 1, wherein: the power shaft (3) is composed of three sections, two ends of the power shaft (3) are respectively provided with a section of threaded rod, the threaded directions of the two sections of threaded rods are opposite, the threaded rods at the two ends are fixedly connected through the round rod, and the pushing teeth (4) and the switching teeth (7) are fixed on the surface of the round rod.
3. The interface expansion device for PVC pipe production according to claim 1, wherein: the upper lifting ring (13) consists of a circular ring and arc plates, the inner side of the circular ring is fixedly connected with three arc plates, one ends of the arc plates, which are close to each other, are fixedly connected with the lower toothed plate (12), and the push rod (22) is fixedly connected to the surface of the arc plates.
4. The interface expansion device for PVC pipe production according to claim 1, wherein: the first extrusion ring (15) is composed of a triangle and a sleeve, a threaded hole is formed in the center of the triangle, the threaded hole is meshed with the power shaft (3), the sleeve is fixedly connected to the outer side of the triangle, an arc plate is fixedly connected to one end, away from the triangle, of the sleeve, and the extrusion plate (16) is fixedly connected with the arc plate.
5. The interface expansion device for PVC pipe production according to claim 1, wherein: the external shape of the extrusion teeth (18) is a cylinder, a through hole is formed in the center of the cylinder, the power shaft (3) penetrates through the through hole, teeth are formed in the upper end of the extrusion teeth (18), teeth are formed in the outer surface of the extrusion teeth (18), and an annular chute is formed in the lower end of the extrusion teeth (18).
6. The interface expansion device for PVC pipe production according to claim 1, wherein: the upper end of the connecting rod (20) is an L-shaped long rod, the top end of the long rod is in sliding connection with the extrusion teeth (18), one end of the long rod, which is far away from the extrusion teeth (18), is fixedly connected with a cylinder, the extrusion spring (21) is arranged in the cylinder, and the push rod (22) is in sliding connection with the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152702.6A CN114393815B (en) | 2022-02-18 | 2022-02-18 | Interface expansion device for PVC pipeline production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152702.6A CN114393815B (en) | 2022-02-18 | 2022-02-18 | Interface expansion device for PVC pipeline production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114393815A CN114393815A (en) | 2022-04-26 |
| CN114393815B true CN114393815B (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210152702.6A Active CN114393815B (en) | 2022-02-18 | 2022-02-18 | Interface expansion device for PVC pipeline production |
Country Status (1)
| Country | Link |
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| CN (1) | CN114393815B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3172639U (en) * | 2011-10-14 | 2012-01-05 | 株式会社フロウエル | Tube end diameter expansion / ring insertion device |
| DE202011050988U1 (en) * | 2011-08-15 | 2012-11-23 | Rehau Ag + Co. | Device for expanding hollow workpieces, in particular the ends of plastic pipes and metal-plastic composite pipes, and its use |
| JP2013010145A (en) * | 2011-06-28 | 2013-01-17 | Kurimoto Ltd | Diameter expansion tool of fixing ring |
| WO2014125025A1 (en) * | 2013-02-13 | 2014-08-21 | Georg Fischer Jrg Ag | Flanging attachment for expanding cylindrical pipe ends |
| KR20150136353A (en) * | 2014-05-27 | 2015-12-07 | 지엘테크(주) | Narrowness space diastole and construction method |
| KR101955560B1 (en) * | 2018-09-06 | 2019-03-07 | 세인스틸 주식회사 | Method for manufacturing the extruded casing for double insulation pipe use for expansion machine and extruded casing for double insulation pipe thereof |
| CN210098747U (en) * | 2019-04-16 | 2020-02-21 | 芜湖德创电气有限公司 | Pipe expanding device for main shell of air-conditioning compressor |
| CN212860422U (en) * | 2020-08-05 | 2021-04-02 | 上海予通管道工程技术有限公司 | Expansion device for repairing hydraulic pipeline |
-
2022
- 2022-02-18 CN CN202210152702.6A patent/CN114393815B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013010145A (en) * | 2011-06-28 | 2013-01-17 | Kurimoto Ltd | Diameter expansion tool of fixing ring |
| DE202011050988U1 (en) * | 2011-08-15 | 2012-11-23 | Rehau Ag + Co. | Device for expanding hollow workpieces, in particular the ends of plastic pipes and metal-plastic composite pipes, and its use |
| JP3172639U (en) * | 2011-10-14 | 2012-01-05 | 株式会社フロウエル | Tube end diameter expansion / ring insertion device |
| WO2014125025A1 (en) * | 2013-02-13 | 2014-08-21 | Georg Fischer Jrg Ag | Flanging attachment for expanding cylindrical pipe ends |
| KR20150136353A (en) * | 2014-05-27 | 2015-12-07 | 지엘테크(주) | Narrowness space diastole and construction method |
| KR101955560B1 (en) * | 2018-09-06 | 2019-03-07 | 세인스틸 주식회사 | Method for manufacturing the extruded casing for double insulation pipe use for expansion machine and extruded casing for double insulation pipe thereof |
| CN210098747U (en) * | 2019-04-16 | 2020-02-21 | 芜湖德创电气有限公司 | Pipe expanding device for main shell of air-conditioning compressor |
| CN212860422U (en) * | 2020-08-05 | 2021-04-02 | 上海予通管道工程技术有限公司 | Expansion device for repairing hydraulic pipeline |
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| Publication number | Publication date |
|---|---|
| CN114393815A (en) | 2022-04-26 |
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Effective date of registration: 20231106 Address after: No. 1002, 10th Floor, Building A, High tech International, No. 227 Changzhi Road, Taiyuan Xuefu Park, Shanxi Comprehensive Reform Demonstration Zone, Taiyuan City, Shanxi Province, 030000 Applicant after: Taiyuan Changda Huamei New Material Technology Co.,Ltd. Address before: 610011 4th floor, unit 1, building 1, No. 11, zidonglou section, East Street, Jinjiang District, Chengdu, Sichuan Applicant before: Sun Yongjiu |
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