CN114406045A - Dolly is restoreed to steel pipe pit - Google Patents
Dolly is restoreed to steel pipe pit Download PDFInfo
- Publication number
- CN114406045A CN114406045A CN202210174020.5A CN202210174020A CN114406045A CN 114406045 A CN114406045 A CN 114406045A CN 202210174020 A CN202210174020 A CN 202210174020A CN 114406045 A CN114406045 A CN 114406045A
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- CN
- China
- Prior art keywords
- steel pipe
- pit
- base
- swinging
- hydraulic jack
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- 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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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 75
- 239000010959 steel Substances 0.000 title claims abstract description 75
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000013016 damping Methods 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000945 filler Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008263 repair mechanism Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a steel pipe pit repairing trolley which comprises a frame body, a pit repairing mechanism and supporting foot structures, wherein the frame body comprises a base and fixing seats, the fixing seats are oppositely arranged at two ends of the base, the bottom of the base protrudes downwards to form an arc shape, the pit repairing mechanism comprises hydraulic jacks and jacks, the hydraulic jacks are installed on the base, the jacks are detachably installed at the top ends of piston rods of the hydraulic jacks, the tops of the jacks protrude upwards to form an arc shape and are used for jacking at a sunken position on the inner wall of a steel pipe, the supporting foot structures are installed at the bottom ends of the fixing seats, the supporting foot structures are arranged on the corresponding fixing seats and are used for swinging the supporting frame body, when pits are repaired, rubber wheels are driven by external force to roll to the pit positions along the inner wall of the steel pipe, the hydraulic jacks drive the piston rods of the hydraulic jacks to upwards jack at the pit positions and apply pressure, and accordingly the pits are repaired. The invention has simple structure and can repair the pits on the pipe walls of various small-aperture steel pipes conveniently.
Description
Technical Field
The invention relates to the field of pipe wall pit repairing equipment, in particular to a steel pipe pit repairing trolley.
Background
The steel pipe inevitably can produce in processing, transportation and the use and collide with for the steel pipe wall forms and falls hole or pit, and this not only can influence the use of steel pipe, and is pleasing to the eye. Therefore, pits on the pipe wall of the steel pipe need to be repaired, but the existing pipe wall pit repairing equipment can only repair the steel pipe with a large aperture, but is difficult to repair the pits on the pipe wall of the steel pipe with a small aperture, and the steel pipe can only be scrapped in most cases.
Disclosure of Invention
In order to solve the problems, the invention provides the steel pipe pit repairing trolley which is simple in structure and can conveniently repair pits on the wall of the small-aperture steel pipe.
The technical scheme of the invention is as follows: a pit repairing trolley for a steel pipe comprises a frame body, a pit repairing mechanism, supporting leg structures and a barrel type damping structure, wherein the frame body comprises a base and fixing seats, the fixing seats are oppositely arranged at two ends of the base, the bottom of the base protrudes downwards to form an arc shape and is used for abutting against the inner wall of the steel pipe, the pit repairing mechanism comprises a hydraulic jack and a top head, the hydraulic jack is arranged on the base and is positioned between the two fixing seats, the top end of a piston rod of the hydraulic jack is detachably arranged with the top head, the top end of the top head protrudes upwards to form an arc shape and is used for abutting against a concave position of the circumferential wall of the steel pipe in the steel pipe, the supporting leg structure is arranged at the bottom end of each fixing seat, the supporting leg structure comprises two swinging legs and a rubber wheel, one end of each swinging leg is hinged at the bottom end of the fixing seat, the rubber wheel is arranged between the other ends of the two swinging legs, one end of the barrel type damping structure is connected with the top end of the fixing seat, the other end of the swinging pin is connected to the two swinging pins for elastic resetting of the swinging pins, when the pit is repaired, the rubber wheel is driven to roll to the pit position along the inner wall of the steel pipe through external force, the hydraulic jack drives the piston rod to drive the ejector to upwards push against the pit position, so that the base correspondingly moves downwards to drive the swinging pins to swing, the swinging pins overcome the elastic force of the cylindrical damping structure and upwards swing around the hinged position of the swinging pins and the fixing seat to be parallel to the base, the bottom of the base abuts against the inner wall of the steel pipe, and the ejector upwards abuts against the pit and applies pressure to repair the pit.
Furthermore, the supporting leg structure includes the pivot, and the pivot is installed on the bottom side of fixing base, and pendulum foot one end is connected in the pivot.
Further, the supporting legs structure includes the installation axle, and the installation axle is installed on two pendulum feet, and the rubber tyer cover is established on the installation axle, rolls along the steel pipe inner wall.
Furthermore, the supporting leg structure comprises a connecting plate which is connected between the two swinging legs for installing a barrel type damping structure.
Furthermore, the top end of each fixing seat is bent outwards to form an extension part for installing the top end of the cylindrical shock absorption structure.
Further, the barrel shock-absorbing structure includes barrel and telescopic link, and the barrel bottom articulates on the connecting plate, and the top of telescopic link articulates on the extension of fixing base, and the bottom of telescopic link stretches into in the barrel, and is flexible along the barrel axial.
Furthermore, the cylinder shock-absorbing structure includes the spring part, and the spring part cover is established on barrel and telescopic link to supply telescopic link flexible the reseing.
Further, cylinder shock-absorbing structure includes filler ring and rings, and the filler ring is established on the lateral surface of barrel fixedly, and the rings top articulates on the extension of fixing base, and the telescopic link top is connected in the rings bottom, and the spring part bottom supports and holds on the filler ring, and the spring part top supports and supports at the rings bottom.
Further, the support body is including embracing tightly hooping, embraces to hoop and sets up in hydraulic jack both sides relatively, and each embraces tightly hooping both ends and fixes on the fixing base that corresponds for the hydraulic jack is fixed in the centre gripping.
Further, pit repair mechanism includes hydraulic pressure right angle and connects, and hydraulic pressure right angle connects and installs on the base, and hydraulic pressure right angle connects one end and connects hydraulic jack, and the other end has the hydraulic pump through oil pipe connection.
Compared with the prior art: the invention provides a steel pipe pit repairing trolley which is characterized in that a frame body is driven by external force to move to a pit position on the pipe wall of a steel pipe, a jacking head is driven by a hydraulic jack to upwards abut against the pit and apply pressure, so that the pit on the inner wall of the steel pipe is repaired.
Drawings
FIG. 1 is a perspective view of the steel pipe pit repairing trolley of the invention.
FIG. 2 is a side view of the steel pipe pit repairing trolley.
In the figure:
1. a frame body; 11. a base; 12. a fixed seat; 13. tightly hooping; 2. a pit repairing mechanism; 21. a hydraulic jack; 22. ejecting the head; 23. a hydraulic right-angle joint; 3. a supporting leg structure; 31. swinging feet; 32. a rubber wheel; 33. a rotating shaft; 34. installing a shaft; 35. a connecting plate; 4. a cylindrical shock-absorbing structure; 41. a barrel; 42. a telescopic rod; 43. a spring member; 44. a ring; 45. a lifting ring.
Detailed Description
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1-2, a steel pipe pit repairing trolley for being placed in a steel pipe to restore pits on the wall of the steel pipe comprises a frame body 1, a pit repairing mechanism 2, a supporting leg structure 3 and a cylindrical shock-absorbing structure 4, wherein the frame body 1 comprises a base 11 and a fixing seat 12, and the bottom of the base 11 protrudes downwards to form an arc shape for abutting against the inner wall of the steel pipe. The fixing seats 12 are oppositely arranged at two ends of the base 11, and the pit repairing mechanisms 2 are installed on the base 11 and used for repairing pits in the wall of the steel pipe. The supporting leg structure 3 is disposed at the bottom end of the corresponding fixing seat 12 for supporting the whole frame body 1. The top end of each fixing seat 12 is bent outwards to form an extension part for installing the top end of the cylindrical shock absorption structure 4.
The frame body 1 comprises an embracing hoop 13, and the embracing hoop 13 is oppositely arranged at two sides of the hydraulic jack 21. Two ends of each clasping hoop 13 are fixed on the corresponding fixed seat 12 and are used for clamping the side surface of the hydraulic jack 21 so as to be matched with the fixed seat 12 to further fix the hydraulic jack 21. In this embodiment, each of the clasping hoops 13 includes two connecting sections (not shown) and a surrounding section (not shown), the surrounding section is in an arc shape matching with the side surface of the hydraulic jack 21, and is connected between the two connecting sections for being clamped on the side surface of the hydraulic jack 21, and the two connecting sections are fixed on the corresponding fixing seats 12 through bolts.
The bottom of each fixing base 12 is installed supporting legs structure 3, supporting legs structure 3 include two pendulum feet 31 and rubber tyer 32, and two pendulum feet 31 articulate respectively in 12 bottom both sides of fixing base, and each pendulum foot 31 one end articulates in 12 bottoms of fixing base, and the other end can be swung around its articulated department with fixing base 12 to support body 1. The rubber wheel 32 is arranged between the other ends of the two swinging legs 31, the rubber wheel 32 is placed at the bottom of the pipe wall in the steel pipe, and the rubber wheel 32 rolls along the inner wall of the steel pipe to drive the swinging legs 31 and the frame body 1 to move to the pit position, so that the pit is repaired by the pit repairing mechanism 2 on the machine body.
Further, the supporting leg structure 3 includes a rotating shaft 33 and a mounting shaft 34, the rotating shaft 33 is rotatably mounted on the bottom end side surface of the fixing base 12, and one end of the swinging leg 31 is connected to the rotating shaft 33. In this embodiment, the side surface of the bottom end of the fixing base 12 protrudes outward to form two mounting portions, and two ends of the rotating shaft 33 are mounted on the two mounting portions. The mounting shaft 34 is mounted on the two swing legs 31 and is parallel to the rotating shaft 33, and the rubber wheel 32 is sleeved on the mounting shaft 34 and rolls along the inner wall of the steel pipe.
It can be understood that the mounting shaft 34 is rotatably mounted on the two swing legs 31, the rubber wheel 32 is fixedly sleeved on the mounting shaft 34, and the mounting shaft 34 drives the rubber wheel 32 to rotate; the mounting shaft 34 may also be fixedly mounted on the two swing legs 31, the rubber wheel 32 is rotatably sleeved on the mounting shaft 34, and the rubber wheel 32 rotates around the axis of the mounting shaft 34.
Further, the supporting foot structure 3 further includes a connecting plate 35, the connecting plate 35 is connected between the two swinging feet 31, is parallel to the rotating shaft 33 or the mounting shaft 34, and is used for stabilizing the distance between every two swinging feet 31 and mounting the barrel type damping structure 4.
One end of the cylindrical shock-absorbing structure 4 is connected to the top end of the fixed seat 12, and the other end is connected to the two swinging legs 31, so that the swinging legs 31 can elastically reset. The cylindrical shock-absorbing structure 4 comprises a cylindrical body 41 and an expansion link 42, wherein the bottom end of the cylindrical body 41 is hinged to the connecting plate 35, the top end of the expansion link 42 is hinged to the extending part of the fixed seat 12, and the bottom end of the expansion link 42 extends into the cylindrical body 41. When the frame body 1 is lifted relative to the inner wall of the steel pipe, the swing leg 31 swings around the hinged position of the swing leg and the fixed seat 12, so that the telescopic rod 42 extends and retracts along the axial direction of the cylinder 41. The cylindrical shock-absorbing structure 4 comprises a spring part 43, the spring part 43 is sleeved on the cylinder body 41 and the telescopic rod 42 to enable the telescopic rod 42 to stretch and return, and the spring part 43 adopts a spiral spring.
Further, the connecting plate 35 is provided with mounting blocks (not shown) relatively, and the bottom end of the cylinder 41 is hinged to the two mounting blocks.
The cylindrical shock absorbing structure 4 includes a supporting ring 44 and a hanging ring 45, the supporting ring 44 is fixedly sleeved on the outer side surface of the cylinder 41, and the supporting ring 44 protrudes outwards relative to the outer side surface of the cylinder 41 to form a supporting position for supporting the spring element 43. The top end of the lifting ring 45 is hinged on the extension part of the fixed seat 12, the top end of the telescopic rod 42 is connected to the bottom end of the lifting ring 45, the bottom end of the spring part 43 is abutted on the supporting ring 44, and the top end of the spring part 43 is abutted on the bottom of the lifting ring 45. When the telescopic rod 42 extends and retracts along the axial direction of the barrel 41, the spring piece 43 abuts against the space between the hanging ring 45 and the supporting ring 44, and after the telescopic rod 42 extends, the hanging ring 45 and the supporting ring 44 are pulled by the spring piece 43, so that the telescopic rod 42 is reset.
Further, the extension of fixing base 12 has seted up the mounting groove, rings 45 top hinge in the mounting groove through the round pin axle.
When the pit on the pipe wall of the steel pipe is repaired by the steel pipe pit repairing trolley, the steel pipe is horizontally placed on a horizontal plane, so that the pit on the pipe wall is positioned at the top of the steel pipe; adjusting the position of the steel pipe pit repairing trolley to enable the ejector 22 to face to the corresponding position of the top of the steel pipe, and measuring and recording the distance from the pit to the end part of the steel pipe; the rubber wheel 32 is driven by external force (manpower or driving equipment) to roll for the same distance along the inner wall of the bottom of the steel pipe, so that the top 22 is aligned to the position of the pit; the hydraulic jack 21 drives the piston rod to drive the ejector 22 to be upwards ejected at the pit position, so that the base 11 correspondingly moves downwards to drive the swinging foot 31 to swing, the swinging foot 31 overcomes the elasticity of the spring part 43 of the cylindrical damping structure 4, swings upwards around the hinged position of the spring part 43 and the fixed seat 12 to be parallel to the base 11, and the bottom of the base 11 is abutted against the bottom of the inner wall of the steel pipe; the jacking head 22 continuously supports against the concave pit upwards under the action of the hydraulic jack 21 and applies pressure, so that the concave pit inwards towards the steel pipe is repaired; after the repair is finished, the hydraulic jack 21 drives the top head 22 to descend, the swinging leg 31 swings downwards around the hinged position of the swinging leg and the fixed seat 12 under the action of the elastic force of the spring piece 43, the bottom of the base 11 is separated from the bottom of the inner wall of the steel pipe, and the rubber wheel 32 is driven by external force to move to another position along the steel pipe to repair the pit or move out of the steel pipe.
In conclusion, the steel pipe repairing frame is simple in structure, the frame body 1 is driven to move to the position of the pit on the pipe wall of the steel pipe through external force, the jacking head 22 is driven to upwards jack the pit through the hydraulic jack 21 and apply pressure, so that the pit on the inner wall of the steel pipe is repaired, the operation is convenient and fast, the repairing efficiency is high, the maintenance cost is low, and the steel pipe repairing frame is suitable for repairing various steel pipes with small apertures.
Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a dolly is restoreed to steel pipe pit, includes support body (1), pit repair body (2), supporting legs structure (3) and cylinder shock-absorbing structure (4), support body (1) includes base (11) and fixing base (12), and fixing base (12) set up the both ends at base (11) relatively, its characterized in that: the bottom of the base (11) protrudes downwards to form an arc shape and is used for abutting against the inner wall of the steel pipe, the pit repairing mechanism (2) comprises a hydraulic jack (21) and a top head (22), the hydraulic jack (21) is installed on the base (11) and is located between the two fixing seats (12), the top head (22) is detachably installed at the top end of a piston rod of the hydraulic jack (21), the top end of the top head (22) protrudes upwards to form an arc shape and is used for supporting the sunken position of the peripheral wall of the steel pipe in the steel pipe, the supporting leg structure (3) is installed at the bottom end of each fixing seat (12), the supporting leg structure (3) comprises two swinging legs (31) and a rubber wheel (32), one end of each swinging leg (31) is hinged to the bottom end of the fixing seat (12), the rubber wheel (32) is installed between the other ends of the two swinging legs (31), one end of the damping structure (4) is connected to the top end of the fixing seat (12), the other end of the swinging pin is connected to the two swinging pins (31) so that the swinging pins (31) can be elastically reset, when a pit is repaired, the rubber wheel (32) is driven to roll to the position of the pit along the inner wall of the steel pipe through external force, the hydraulic jack (21) drives the piston rod to drive the ejector head (22) to upwards prop and hold the position of the pit, the base (11) correspondingly moves downwards to drive the swinging pins (31) to swing, the swinging pins (31) overcome the elasticity of the cylindrical damping structure (4) and upwards swing around the hinged position of the swinging pins and the fixing seat (12) to be parallel to the base (11), the bottom of the base (11) is propped against the inner wall of the steel pipe, and the ejector head (22) upwards props against the pit and applies pressure to repair the pit.
2. The steel pipe pit repairing trolley according to claim 1, characterized in that: the supporting leg structure (3) comprises a rotating shaft (33), the rotating shaft (33) is installed on the side face of the bottom end of the fixed seat (12), and one end of the swinging leg (31) is connected to the rotating shaft (33).
3. The steel pipe pit repairing trolley according to claim 2, characterized in that: the supporting foot structure (3) comprises a mounting shaft (34), the mounting shaft (34) is mounted on the two swinging feet (31), and the rubber wheel (32) is sleeved on the mounting shaft (34) and rolls along the inner wall of the steel pipe.
4. The steel pipe pit repairing trolley according to claim 1, characterized in that: the supporting leg structure (3) comprises a connecting plate (35), and the connecting plate (35) is connected between the two swinging legs (31) for mounting the barrel type damping structure (4).
5. The steel pipe pit repairing trolley according to claim 1, characterized in that: the top end of each fixed seat (12) is bent outwards to form an extension part for installing the top end of the cylindrical shock absorption structure (4).
6. The steel pipe pit repairing trolley according to claim 5, wherein: the cylindrical shock absorption structure (4) comprises a cylindrical body (41) and an expansion rod (42), the bottom end of the cylindrical body (41) is hinged to the connecting plate (35), the top end of the expansion rod (42) is hinged to the extending portion of the fixing seat (12), and the bottom end of the expansion rod (42) extends into the cylindrical body (41) and stretches axially along the cylindrical body (41).
7. The steel pipe pit repairing trolley according to claim 6, wherein: the telescopic shock absorption structure (4) comprises a spring piece (43), and the spring piece (43) is sleeved on the cylinder body (41) and the telescopic rod (42) so as to enable the telescopic rod (42) to stretch and reset.
8. The steel pipe pit repairing trolley according to claim 7, wherein: the cylindrical shock absorption structure (4) comprises a supporting ring (44) and a lifting ring (45), the supporting ring (44) is fixedly sleeved on the outer side face of the cylinder body (41), the top end of the lifting ring (45) is hinged to an extending portion of the fixing seat (12), the top end of the telescopic rod (42) is connected to the bottom end of the lifting ring (45), the bottom end of the spring part (43) is abutted to the supporting ring (44), and the top end of the spring part (43) is abutted to the bottom of the lifting ring (45).
9. The steel pipe pit repairing trolley according to claim 1, characterized in that: the support body (1) is including embracing tightly hoop (13), embraces tightly hoop (13) and sets up in hydraulic jack (21) both sides relatively, and each embraces tightly hoop (13) both ends and fixes on fixing base (12) that corresponds for hydraulic jack (21) are fixed in the centre gripping.
10. The steel pipe pit repairing trolley according to claim 1, characterized in that: pit repair body (2) include hydraulic pressure right angle joint (23), and hydraulic pressure right angle joint (23) are installed on base (11), and hydraulic jack (21) are connected to hydraulic pressure right angle joint (23) one end, and the other end has the hydraulic pump through oil pipe connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174020.5A CN114406045B (en) | 2022-02-23 | 2022-02-23 | Steel pipe pit repair trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174020.5A CN114406045B (en) | 2022-02-23 | 2022-02-23 | Steel pipe pit repair trolley |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114406045A true CN114406045A (en) | 2022-04-29 |
| CN114406045B CN114406045B (en) | 2024-10-01 |
Family
ID=81262152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210174020.5A Active CN114406045B (en) | 2022-02-23 | 2022-02-23 | Steel pipe pit repair trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114406045B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921599A (en) * | 2023-02-20 | 2023-04-07 | 山东高原油气装备有限公司 | Pit falling repairing machine for petroleum casing pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100130424A (en) * | 2009-06-03 | 2010-12-13 | 주식회사 스틸플라워 | Device for correcting round of large caliber steel pipe |
| CN203635683U (en) * | 2013-12-30 | 2014-06-11 | 刘晨蕾 | Electric steel tube pit repairing device |
| CN204018435U (en) * | 2014-09-01 | 2014-12-17 | 中国石油集团渤海石油装备制造有限公司 | A kind of steel pipe aligning internal support device |
| CN209223509U (en) * | 2018-12-27 | 2019-08-09 | 济南玛钢钢管制造有限公司 | A kind of small-bore spiral steel pipe tube wall pit prosthetic appliance |
| CN213162535U (en) * | 2020-06-08 | 2021-05-11 | 江苏中大杆塔有限公司 | Pipe fitting repairing device for steel pipe tower |
-
2022
- 2022-02-23 CN CN202210174020.5A patent/CN114406045B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100130424A (en) * | 2009-06-03 | 2010-12-13 | 주식회사 스틸플라워 | Device for correcting round of large caliber steel pipe |
| CN203635683U (en) * | 2013-12-30 | 2014-06-11 | 刘晨蕾 | Electric steel tube pit repairing device |
| CN204018435U (en) * | 2014-09-01 | 2014-12-17 | 中国石油集团渤海石油装备制造有限公司 | A kind of steel pipe aligning internal support device |
| CN209223509U (en) * | 2018-12-27 | 2019-08-09 | 济南玛钢钢管制造有限公司 | A kind of small-bore spiral steel pipe tube wall pit prosthetic appliance |
| CN213162535U (en) * | 2020-06-08 | 2021-05-11 | 江苏中大杆塔有限公司 | Pipe fitting repairing device for steel pipe tower |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921599A (en) * | 2023-02-20 | 2023-04-07 | 山东高原油气装备有限公司 | Pit falling repairing machine for petroleum casing pipe |
| CN115921599B (en) * | 2023-02-20 | 2023-07-21 | 山东高原油气装备有限公司 | A fall hole repairing machine for petroleum casing pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114406045B (en) | 2024-10-01 |
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