CN114472725A - Automatic flanging equipment for stainless steel composite steel pipe - Google Patents
Automatic flanging equipment for stainless steel composite steel pipe Download PDFInfo
- Publication number
- CN114472725A CN114472725A CN202210169066.8A CN202210169066A CN114472725A CN 114472725 A CN114472725 A CN 114472725A CN 202210169066 A CN202210169066 A CN 202210169066A CN 114472725 A CN114472725 A CN 114472725A
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- China
- Prior art keywords
- flanging
- steel pipe
- cylindrical cavity
- push rod
- piston
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Classifications
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- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
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- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
-
- 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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses automatic flanging equipment for a stainless steel composite steel pipe, and relates to the technical field of flanging equipment. According to the automatic flanging device, the lower supporting platform, the flanging assembly, the compressing assembly and the driving assembly which are matched with each other are arranged, so that the steel pipe can be automatically compressed in the machining process, lubricating oil is sprayed at the flanging position, the automatic flanging of the steel pipe is realized, manual operation steps are reduced, and the product quality and the production efficiency are improved.
Description
Technical Field
The invention relates to the technical field of flanging equipment, in particular to automatic flanging equipment for a stainless steel composite steel pipe.
Background
The stainless steel composite steel pipe is a new material compounded by two metal materials of stainless steel and carbon structural steel synchronously by adopting lossless pressure, has the advantages of corrosion resistance, wear resistance, excellent appearance, good bending strength and impact resistance of carbon steel, and is often required to be flanged during production and processing.
However, when the end of the steel pipe is flanged, the flanging is manually knocked and compacted in most cases, so that the labor intensity is very high, the environmental noise is high, the working efficiency is low, the defect rate of finished products is high, and the appearances are not uniform.
Disclosure of Invention
The invention aims to: in order to solve the problems, the automatic flanging equipment for the stainless steel composite steel pipe is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the automatic flanging equipment for the stainless steel composite steel pipe comprises a processing table, an L-shaped mounting frame fixedly mounted at the upper end of the processing table and a steel pipe limiting table arranged on the right side of the upper end of the processing table and used for limiting the steel pipe, wherein a lower supporting table used for supporting the steel pipe is fixedly mounted in the middle of the upper end face of the processing table, a cylindrical cavity is formed in the lower supporting table, a pressing assembly matched with the lower supporting table and used for fixing and limiting the steel pipe is mounted on the L-shaped mounting frame, a flanging assembly used for flanging the steel pipe is slidably arranged on the processing table, and a driving assembly used for being matched with the flanging assembly and used for driving the pressing assembly is further arranged in the cylindrical cavity;
the driving assembly comprises a push rod and a fixed rod fixedly arranged on the side wall in the cylindrical cavity, one end of the push rod penetrates through the side wall of the cylindrical cavity in a sliding mode and is sleeved on the outer surface of the fixed rod, a baffle is fixedly arranged at the other end of the push rod, a push block is fixedly arranged at one end of the push rod, which is positioned in the first cavity, an adjusting spring is fixedly arranged at one end of the push block, which is far away from the push rod, a first piston is fixedly arranged at the other end of the adjusting spring, the outer diameter size of the first piston is matched with the inner diameter size of the cylindrical cavity, a second reset spring is fixedly arranged at the other end of the first piston, and the second reset spring is fixedly connected with the side wall in the cylindrical cavity;
a second piston is fixedly arranged at one end of the fixed rod, which is positioned in the push rod, the outer diameter ruler of the second piston is matched with the inner diameter of the push rod, the surface of the push rod, which is positioned outside the cylindrical cavity, is also fixedly connected with a spray head and an oil injection pipe, the other end of the oil injection pipe is communicated with an external oil storage tank, and one-way valves are arranged in the spray head and the oil injection pipe;
the side wall of one side of the cylindrical cavity, which is close to the flanging assembly, is further provided with an air vent, the side wall of one end, which is far away from the air vent, of the cylindrical cavity is connected with an air duct, and the other end of the air duct is connected with the pressing assembly.
As a further description of the above technical solution:
compress tightly the subassembly and include the fixed sleeve of fixed mounting on L type mounting bracket, the inside slip of fixed sleeve is equipped with swing joint pole, swing joint pole is located the fixed third piston that is equipped with of the inside one end of fixed sleeve, third piston external diameter and fixed sleeve internal diameter looks adaptation, swing joint pole surface still overlaps and is equipped with supporting spring, swing joint pole bottom fixed mounting has the pressure platform, the inside installation cavity of having seted up of pressure platform, the inside bottom slip of installation cavity is equipped with two slide bars, two the equal fixed mounting in slide bar bottom has the arc pressure strip, just the slide bar is located and is equipped with first reset spring between the one end of mounting groove and the mounting groove inner wall, fixed sleeve top lateral wall is connected with the air duct.
As a further description of the above technical solution:
the processing table is characterized in that the upper end face of the processing table is provided with a mounting groove, a first lead screw is rotationally arranged in the mounting groove, the surface of the first lead screw is connected with a flanging assembly through threads, the first lead screw is driven by an external motor, the flanging assembly comprises a movable table in threaded connection with the surface of the first lead screw, one end of the movable table close to the side wall of the lower support table is fixedly provided with a limiting sleeve, the inner wall of the limiting sleeve is provided with a sliding groove, an arc-shaped flanging head is arranged in the sliding groove in a sliding manner, one end of the arc-shaped flanging head positioned in the limiting sleeve is fixedly provided with a second lead screw, the side wall in the movable table is also fixedly provided with a threaded sleeve in threaded connection with the second lead screw, the outer side wall of the movable table is fixedly provided with a driving motor, the output shaft of the driving motor is fixedly connected with the threaded sleeve, and the outer surface of the limiting sleeve is fixedly provided with a push plate matched with a baffle plate, the push plate is embodied in an annular configuration.
As a further description of the above technical solution:
the elastic force of the second return spring is smaller than that of the adjusting spring.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the automatic flanging device, the lower supporting platform, the flanging assembly, the compressing assembly and the driving assembly which are matched with each other are arranged, so that the steel pipe can be automatically compressed in the machining process, lubricating oil is sprayed at the flanging position, the automatic flanging of the steel pipe is realized, manual operation steps are reduced, and the product quality and the production efficiency are improved.
Drawings
FIG. 1 illustrates a schematic overall appearance structure provided according to the present invention;
FIG. 2 shows a schematic overall cross-sectional structure provided in accordance with the present invention;
FIG. 3 illustrates a schematic diagram of the different states of FIG. 2 provided in accordance with the present invention;
FIG. 4 is a schematic view of the internal structure of the lower tray of FIG. 2 according to the present invention;
FIG. 5 is an enlarged schematic view of the compression assembly of FIG. 2 according to the present invention;
FIG. 6 illustrates an enlarged cross-sectional view of a turn-up assembly provided in accordance with the present invention;
fig. 7 shows a schematic diagram of the different motion states of fig. 6 according to the present invention.
Illustration of the drawings:
1. a processing table; 2. an L-shaped mounting bracket; 3. a steel pipe limiting table; 4. a lower saddle; 5. a compression assembly; 6. a first lead screw; 7. a flanging component; 8. a drive assembly; 9. an air duct; 51. fixing the sleeve; 52. a movable connecting rod; 53. a support spring; 54. an upper pressing table; 55. a slide bar; 56. an arc-shaped pressing plate; 57. a first return spring; 71. a movable table; 72. a limiting sleeve; 73. an arc-shaped flanging head; 74. a drive motor; 75. a threaded sleeve; 76. a second lead screw; 77. pushing the plate; 81. a push rod; 82. a push block; 83. adjusting the spring; 84. a first piston; 85. a second return spring; 86. fixing the rod; 87. a spray head; 88. an oil filling pipe; 89. a baffle plate; 861. a second piston.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: the automatic flanging equipment for the stainless steel composite steel pipe comprises a processing table 1, an L-shaped mounting frame 2 fixedly mounted at the upper end of the processing table 1 and a steel pipe limiting table 3 arranged at the right side of the upper end of the processing table 1 and used for limiting the steel pipe, a lower supporting table 4 used for supporting the steel pipe is fixedly mounted at the middle position of the upper end face of the processing table 1, a cylindrical cavity is formed in the lower supporting table 4, a pressing assembly 5 matched with the lower supporting table 4 and used for fixing and limiting the steel pipe is mounted on the L-shaped mounting frame 2, a flanging assembly 7 used for flanging the steel pipe is slidably arranged on the processing table 1, and a driving assembly 8 matched with the flanging assembly 7 and used for driving the pressing assembly 5 is further arranged in the cylindrical cavity;
the driving assembly 8 comprises a push rod 81 and a fixing rod 86 fixedly arranged on the inner side wall of the cylindrical cavity, one end of the push rod 81 penetrates through the side wall of the cylindrical cavity in a sliding mode and is sleeved on the outer surface of the fixing rod 86, a baffle 89 is fixedly arranged at the other end of the push rod 81, a push block 82 is fixedly arranged at one end, located inside the first cavity, of the push rod 81, an adjusting spring 83 is fixedly arranged at one end, away from the push rod 81, of the push block 82, a first piston 84 is fixedly arranged at the other end of the adjusting spring 83, the outer diameter size of the first piston 84 is matched with the inner diameter size of the cylindrical cavity, a second reset spring 85 is fixedly arranged at the other end of the first piston 84, and the second reset spring 85 is fixedly connected with the inner side wall of the cylindrical cavity;
a second piston 861 is fixedly arranged at one end, located inside the push rod 81, of the fixing rod 86, an outer diameter ruler of the second piston 861 is matched with the inner diameter of the push rod 81, a spray head 87 and an oil injection pipe 88 are fixedly connected to the surface of the push rod 81, located on the outer side of the cylindrical cavity, the other end of the oil injection pipe 88 is communicated with an external oil storage tank, and one-way valves are arranged inside the spray head 87 and the oil injection pipe 88;
the air vent has still been seted up to one side lateral wall that cylindrical cavity is close to turn-ups subassembly 7, and the lateral wall that cylindrical cavity kept away from air vent one end is connected with air duct 9, and the air duct 9 other end is connected with compressing tightly subassembly 5.
Further, compress tightly subassembly 5 and include fixed sleeve 51 of fixed mounting on L type mounting bracket 2, the inside slip of fixed sleeve 51 is equipped with swing joint pole 52, swing joint pole 52 is located the fixed third piston that is equipped with of the inside one end of fixed sleeve 51, third piston external diameter and fixed sleeve 51 internal diameter size looks adaptation, swing joint pole 52 surface still overlaps and is equipped with supporting spring 53, swing joint pole 52 bottom fixed mounting has last pressure platform 54, the inside installation cavity of having seted up of last pressure platform 54, the inside bottom slip of installation cavity is equipped with two slide bars 55, the equal fixed mounting in two slide bars 55 bottoms has arc pressure strip 56, and be equipped with first reset spring 57 between slide bar 55 one end that is located the mounting groove and the mounting groove inner wall, fixed sleeve 51 top lateral wall is connected with air duct 9.
Further, the upper end surface of the processing table 1 is provided with a mounting groove, a first lead screw 6 is rotatably arranged in the mounting groove, the surface of the first lead screw 6 is connected with a flanging assembly 7 through a thread, the first lead screw 6 is driven by an external motor, the flanging assembly 7 comprises a movable table 71 in threaded connection with the surface of the first lead screw 6, one end of the movable table 71 close to the side wall of the lower support table 4 is fixedly provided with a limiting sleeve 72, the inner wall of the limiting sleeve 72 is provided with a sliding groove, an arc-shaped flanging head 73 is arranged in the sliding groove in a sliding manner, one end of the arc-shaped flanging head 73 positioned in the limiting sleeve 72 is fixedly provided with a second lead screw 76, the side wall in the movable table 71 is also fixedly provided with a threaded sleeve 75 in threaded connection with the second lead screw 76, the outer side wall of the movable table 71 is fixedly provided with a driving motor 74, the output shaft of the driving motor 74 is fixedly connected with the threaded sleeve 75, and the outer surface of the limiting sleeve 72 is fixedly provided with a push plate 77 matched with a baffle 89, the push plate 77 is embodied in an annular configuration.
Further, the elastic force of the second return spring 85 is smaller than the elastic force of the adjusting spring 83.
The working principle is as follows: when the device is used, firstly, a steel pipe to be flanged is placed on the lower supporting table 4, one end of the steel pipe is abutted to the steel pipe limiting table 3, then the external motor is started, the external motor drives the first screw rod 6 to rotate, the first screw rod 6 further drives the movable table 71 to move to be close to the lower supporting table 4, the push plate 77 is firstly abutted to the baffle 89 and pushes the baffle 89 to move synchronously, the baffle 89 pushes the push rod 81 to move in the moving process, the push rod 81 pushes the inside of the push rod 81 in the moving process, so that lubricating oil in the push rod 81 is sprayed out through the spray head 87, the lubricating oil steel pipe sprayed out by the spray head 87 can be sprayed on the surface of the arc flanging head 73 so as to lubricate the surface of the arc flanging head 73, meanwhile, the push rod 81 further drives the push block 82 and the adjusting spring 83 to push the first piston 84, the first piston 84 further extrudes the second return spring 85, air in the cylindrical cavity is guided into the fixed sleeve 51 through the air guide tube 9, the air enters the fixed sleeve 51 and then further pushes the movable connecting rod 52 to descend through the third piston, the movable connecting rod 52 can drive the upper pressing table 54 fixedly connected with the bottom of the movable connecting rod to gradually descend until the arc pressing plate 56 in the upper pressing table 54 starts to abut against the steel pipe, the arc pressing plate 56 abuts against the steel pipe and then extrudes the first return spring 57 until the limit position is reached, when the arc flanging head 73 is about to abut against the steel pipe, the upper pressing table 54 starts to abut against the lower support 4 at the moment, the limit fixing of the steel pipe is realized, along with the continuous rotation of the first screw rod 6, the arc flanging head 73 starts to be inserted into the steel pipe, the arc surface of the arc flanging head 73 is opened to perform flaring and flanging treatment on the steel pipe, meanwhile, the push rod 81 continues to be pushed, and at the moment, the push rod 81 starts to extrude the adjusting spring 83 through the push block 82, until the flaring and flanging are finished, the external motor is driven to rotate reversely at the moment, and the arc-shaped flanging head 73 is driven to be far away from the steel pipe;
when the arc flanging head 73 is away from the steel pipe by a distance, the driving motor 74 is started, the driving motor 74 starts to drive the arc flanging head 73 to rotate, the arc flanging head 73 further drives the second lead screw 76 to move, the second lead screw 76 further drives the arc flanging head 73 fixedly connected with the other end of the second lead screw to contract into the limiting sleeve 72, then the external motor is continuously driven to rotate forwards, the first lead screw 6 drives the movable platform 71 to be close to the steel pipe, the limiting sleeve 72 can extrude the flanging position of the steel pipe, so that the flanging position forms a vertical angle with the steel pipe, then the external motor is driven to rotate backwards, so that the movable platform 71 is driven to move to the initial position, at the moment, the push rod 81 loses the limit, the second reset spring 85 and the support spring 53 reset, so that the air in the fixed sleeve 51 can be matched to be guided back into the cylindrical cavity again, and the push rod 81 is in the resetting process, inside negative pressure state that produces to can extract to inside through annotating the lubricating oil of oil pipe 88 in with external batch oil tank and keep in, convenient next time uses, and the bench 54 that presses is also driven by swing joint pole 52 and is lifted again and resets this moment, so that operating personnel takes out the steel pipe that the turn-ups ended, and installs the new turn-ups steel pipe of treating, carries out next round of operation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The automatic flanging equipment for the stainless steel composite steel pipe comprises a processing table (1), an L-shaped mounting frame (2) fixedly mounted at the upper end of the processing table (1) and a steel pipe limiting table (3) arranged on the right side of the upper end of the processing table (1) and used for limiting the steel pipe, wherein a lower supporting table (4) used for supporting the steel pipe is fixedly mounted in the middle of the upper end face of the processing table (1), a cylindrical cavity is formed in the lower supporting table (4), the automatic flanging equipment is characterized in that a pressing assembly (5) matched with the lower supporting table (4) and used for fixing and limiting the steel pipe is mounted on the L-shaped mounting frame (2), a flanging assembly (7) used for flanging the steel pipe is arranged in the processing table (1) in a sliding mode, and a driving assembly (8) matched with the flanging assembly (7) and used for driving the pressing assembly (5) is further arranged in the cylindrical cavity;
the driving component (8) comprises a push rod (81) and a fixed rod (86) fixedly arranged on the inner side wall of the cylindrical cavity, one end of the push rod (81) penetrates through the side wall of the cylindrical cavity in a sliding manner and is sleeved on the outer surface of the fixing rod (86), the other end of the push rod (81) is fixedly provided with a baffle plate (89), and one end of the push rod (81) positioned in the first cavity is fixedly provided with a push block (82), an adjusting spring (83) is fixedly arranged at one end of the push block (82) far away from the push rod (81), a first piston (84) is fixedly arranged at the other end of the adjusting spring (83), the outer diameter of the first piston (84) is matched with the inner diameter of the cylindrical cavity, a second return spring (85) is fixedly arranged at the other end of the first piston (84), the second return spring (85) is fixedly connected with the inner side wall of the cylindrical cavity;
a second piston (861) is fixedly arranged at one end, located inside the push rod (81), of the fixing rod (86), an outer diameter ruler of the second piston (861) is matched with the inner diameter of the push rod (81), a spray head (87) and an oil injection pipe (88) are fixedly connected to the surface of the position, located outside the cylindrical cavity, of the push rod (81), the other end of the oil injection pipe (88) is communicated with an external oil storage tank, and one-way valves are arranged inside the spray head (87) and the oil injection pipe (88);
the side wall of one side of the cylindrical cavity, which is close to the flanging assembly (7), is also provided with an air vent, the side wall of the cylindrical cavity, which is far away from one end of the air vent, is connected with an air duct (9), and the other end of the air duct (9) is connected with the pressing assembly (5).
2. The automatic flanging equipment for the stainless steel composite steel pipes according to claim 1, wherein the pressing assembly (5) comprises a fixed sleeve (51) fixedly mounted on the L-shaped mounting frame (2), a movable connecting rod (52) is slidably arranged in the fixed sleeve (51), a third piston is fixedly arranged at one end of the movable connecting rod (52) positioned in the fixed sleeve (51), the outer diameter of the third piston is matched with the inner diameter of the fixed sleeve (51), a supporting spring (53) is further sleeved on the surface of the movable connecting rod (52), an upper pressing table (54) is fixedly mounted at the bottom of the movable connecting rod (52), a mounting cavity is formed in the upper pressing table (54), two sliding rods (55) are slidably arranged at the bottom end in the mounting cavity, and arc-shaped pressing plates (56) are fixedly mounted at the bottoms of the two sliding rods (55), and a first return spring (57) is arranged between one end of the sliding rod (55) in the mounting groove and the inner wall of the mounting groove, and the side wall of the top of the fixed sleeve (51) is connected with the air duct (9).
3. The automatic flanging device for the stainless steel composite steel pipe according to claim 1, wherein an installation groove is formed in the upper end face of the processing table (1), a first lead screw (6) is rotatably arranged in the installation groove, a flanging component (7) is connected to the surface of the first lead screw (6) through threads, the first lead screw (6) is driven by an external motor, the flanging component (7) comprises a movable table (71) in threaded connection with the surface of the first lead screw (6), a limiting sleeve (72) is fixedly arranged at one end, close to the side wall of the lower supporting table (4), of the movable table (71), a sliding groove is formed in the inner wall of the limiting sleeve (72), an arc-shaped flanging head (73) is arranged in the sliding groove, a second lead screw (76) is fixedly arranged at one end, located inside the limiting sleeve (72), of the arc-shaped flanging head (73), and a threaded sleeve (75) in threaded connection with the second lead screw (76) is fixedly arranged on the side wall inside the movable table (71) The utility model discloses a, movable table (71) lateral wall fixed mounting has driving motor (74), driving motor (74) output shaft and threaded sleeve (75) fixed connection, limit sleeve (72) external surface is fixed with push pedal (77) with baffle (89) cooperation use, push pedal (77) specifically are the annular structure.
4. The automatic flanging device for the stainless steel composite steel pipe according to claim 1, wherein the elastic force of the second return spring (85) is smaller than that of the adjusting spring (83).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210169066.8A CN114472725A (en) | 2022-02-23 | 2022-02-23 | Automatic flanging equipment for stainless steel composite steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210169066.8A CN114472725A (en) | 2022-02-23 | 2022-02-23 | Automatic flanging equipment for stainless steel composite steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114472725A true CN114472725A (en) | 2022-05-13 |
Family
ID=81483689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210169066.8A Withdrawn CN114472725A (en) | 2022-02-23 | 2022-02-23 | Automatic flanging equipment for stainless steel composite steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114472725A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115871217A (en) * | 2023-03-03 | 2023-03-31 | 胜利油田高原石油装备有限责任公司 | A inside lining oil pipe turn-ups closing device for oil field |
-
2022
- 2022-02-23 CN CN202210169066.8A patent/CN114472725A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115871217A (en) * | 2023-03-03 | 2023-03-31 | 胜利油田高原石油装备有限责任公司 | A inside lining oil pipe turn-ups closing device for oil field |
| CN115871217B (en) * | 2023-03-03 | 2023-06-09 | 山东高原油气装备有限公司 | A inside lining oil pipe turn-ups closing device for oil field |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220513 |