CN111589808A - Oil pipeline inner wall scale removal device - Google Patents
Oil pipeline inner wall scale removal device Download PDFInfo
- Publication number
- CN111589808A CN111589808A CN202010460469.9A CN202010460469A CN111589808A CN 111589808 A CN111589808 A CN 111589808A CN 202010460469 A CN202010460469 A CN 202010460469A CN 111589808 A CN111589808 A CN 111589808A
- Authority
- CN
- China
- Prior art keywords
- wall
- motor
- pipeline inner
- descaling device
- brush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0433—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided exclusively with fluid jets as cleaning tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/047—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
- B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
- B08B2209/04—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces using cleaning devices introduced into and moved along the pipes
Abstract
The invention discloses a descaling device for the inner wall of an oil delivery pipeline, which relates to the field of pipeline cleaning devices and comprises a machine base, a motor and a mechanical descaling device, wherein the machine base comprises a motor mounting seat and three walking wheel supports integrally formed on one side of the motor mounting seat, the motor is arranged on one side of the motor mounting seat, the mechanical descaling device is arranged on the outer wall of a rotating shaft connected with an output shaft of the motor, and the descaling device has the advantages that: in the process of walking inside the oil pipe, when the rotating shaft is driven to rotate by the motor, the steel brushes adhered to the outer walls of the brush support plates in the brush-sweeping type descaling assembly scrub the inner wall of the oil pipe, and meanwhile, the cleaning agent sprayed to the inner wall of the oil pipe by the liquid spraying pipe is uniformly sprayed; the scraper welded on the outer wall of the scraper support plate in the scraping type descaling assembly effectively scrapes dirt on the inner wall of the oil pipe, and the cleaning effect on the inner wall of the oil pipe is guaranteed.
Description
Technical Field
The invention relates to the field of pipeline cleaning devices, in particular to a descaling device for an inner wall of a petroleum transmission pipeline.
Background
After a petroleum pipeline is subjected to a long-time fluid conveying process, various scales may be formed on the inner wall of the conveying pipe, so that the pipeline is blocked, and normal mining and conveying production operations are influenced. Because the petroleum pipeline is long in length, the process of descaling by adopting the traditional mechanical structure is troublesome, and incomplete descaling of the inner wall of the oil pipe is easily caused; while the traditional mode of removing the rust and various oil dirt of the petroleum pipeline by adopting a chemical method does not combine mechanical equipment for auxiliary descaling, and has long descaling time consumption, low efficiency and common effect.
Disclosure of Invention
The invention aims to provide a descaling device for the inner wall of an oil pipeline, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an oil pipeline inner wall scale removal device, includes frame, motor and mechanical rust cleaning device, the frame includes that motor mount pad and motor mount pad one side integrated into one piece's three walking wheel supports constitute, and bolt fixedly connected with motor is passed through to motor mount pad one side, and the output shaft of motor runs through the motor mount pad, and the output shaft end of motor has the pivot through the coupling joint, and the outer wall of pivot is provided with mechanical rust cleaning device.
Preferably, three the outer wall integrated into one piece of walking wheel support has the support, and the left and right sides of support is connected with the wheel seat through walking wheel supporting rod group, rotates in the wheel seat to be connected with the walking wheel.
Preferably, the two walking wheel support rod groups connected with the support are respectively obliquely arranged towards two outer sides at an angle of 30-45 degrees, and the rolling direction of the walking wheels is consistent with the direction of the central axis of the motor output shaft.
Preferably, walking wheel supporting rod group is including the guide cylinder and the guide bar of mutual registrate, the tip of guide cylinder and guide bar respectively with support and wheel seat welded fastening, the outside cover of guide cylinder and guide bar is equipped with first spring, and first spring both ends respectively with support and wheel seat inconsistent.
Preferably, the outside cover of motor mount pad is equipped with the hydrojet pipe, the hydrojet pipe is annular pipe body, and the hydrojet pipe outer wall is provided with a plurality of high pressure nozzle that evenly arrange the setting.
Preferably, the lower extreme welding of hydrojet pipe and intercommunication have the feed liquor to connect, and the feed liquor connects through feed liquor union coupling pump machine.
Preferably, the mechanical rust removing device connected to the outside of the rotating shaft comprises a brushing and sweeping type descaling component and a scraping and descaling component, wherein the brushing and sweeping type descaling component comprises three groups of first telescopic rod groups which are connected with the outer wall of the rotating shaft and arranged at an angle of 120 degrees at intervals, and a brush support plate is connected to the outer end part of each first telescopic rod group.
Preferably, the brush support plate is a circular arc-shaped plate body, and a steel brush is adhered and fixed on the outer surface of the brush support plate.
Preferably, the scraping type descaling assembly comprises three groups of second telescopic rod groups which are connected with the outer wall of the rotating shaft and arranged at an angle of 120 degrees at intervals, and scraper supporting plates connected to the outer end parts of the second telescopic rod groups.
Preferably, the scraper supporting plate is a circular arc-shaped plate body, a plurality of scrapers are welded on the outer surface of the scraper supporting plate, and the plurality of scrapers are obliquely welded and fixed on the outer wall of the scraper supporting plate.
Preferably, the first telescopic rod group and the second telescopic rod group are respectively composed of a telescopic outer cylinder and a telescopic inner rod which are mutually sleeved, and a second spring is connected between the inner end of the telescopic inner rod and the inside of the telescopic outer cylinder.
Preferably, one end of the motor, which is far away from the output shaft, is welded with a traction ring, and a traction rope is bound on the traction ring.
The invention has the technical effects and advantages that:
1. in the process of walking inside the oil pipe, the cleaning agent is extracted under the work of a pump, is guided into the liquid spraying pipe, and is sprayed to the inner wall of the oil pipe through the high-pressure nozzles arranged on the outer wall of the liquid spraying pipe, so that the cleaning agent can dissolve oil dirt on the inner wall of the oil pipe;
2. in the process of walking inside the oil pipe, when the rotating shaft is driven to rotate by the motor, the steel brushes adhered to the outer walls of the brush support plates in the brush-sweeping type descaling assembly scrub the inner wall of the oil pipe, and meanwhile, the cleaning agent sprayed to the inner wall of the oil pipe by the liquid spraying pipe is uniformly sprayed;
3. in the process of walking inside the oil pipe, when the rotating shaft is driven to rotate by the motor, the scraper welded on the outer wall of the scraper supporting plate in the scraping type descaling assembly effectively scrapes off dirt on the inner wall of the oil pipe, so that the cleaning effect on the inner wall of the oil pipe is ensured.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a front view of the structure of the present invention.
Fig. 3 is a cross-sectional view taken at a-a in fig. 2.
Fig. 4 is an enlarged view at B in fig. 3.
Fig. 5 is an enlarged view at C in fig. 3.
In the figure: 1. a machine base; 101. a motor mounting seat; 102. a traveling wheel bracket; 2. a motor; 3. a rotating shaft; 4. a support; 5. a road wheel support rod set; 6. a wheel seat; 7. a traveling wheel; 8. a first telescopic rod group; 9. a second telescopic rod group; 10. a brush support plate; 11. a steel brush; 12. a scraper support plate; 13. a scraper; 14. a liquid spraying pipe; 15. a liquid inlet joint; 16. a high pressure nozzle; 17. a traction ring; 18. a guide cylinder; 19. a guide bar; 20. a first spring; 21. a telescopic outer cylinder; 22. a telescopic inner rod; 23. a second spring.
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.
The invention provides a descaling device for the inner wall of an oil pipeline as shown in figures 1-5, which comprises a machine base 1, a motor 2 and a mechanical descaling device, and is combined with figures 1 and 3, wherein the machine base 1 comprises a motor mounting seat 101 and three walking wheel supports 102 integrally formed on one side of the motor mounting seat 101, one side of the motor mounting seat 101 is fixedly connected with the motor 2 through bolts, an output shaft of the motor 2 penetrates through the motor mounting seat 101, the output shaft end of the motor 2 is connected with a rotating shaft 3 through a coupler, and the outer wall of the rotating shaft 3 is provided with the mechanical descaling device, the left side and the right side of the support 4 are connected with a wheel seat 6 through a walking wheel support rod group 5, a walking wheel 7 is rotatably connected in the wheel seat 6, the rolling direction of the walking wheel 7 is consistent with the central axis direction of an output shaft of the motor 2, under the rolling contact of the walking wheel 7 and the inner wall of the oil pipe, one end of the motor 2 far away from the output shaft is welded with a traction ring 17, a traction rope is bound on the traction ring 17, the walking device can walk in the oil pipe by drawing the traction rope, and the two walking wheel support rod groups 5 connected with the support 4 are respectively arranged in an inclined mode at an angle of 30-45 degrees towards the two outer sides, so that the walking device is more stable when walking in the.
The walking wheel support rod group 5 comprises a guide cylinder 18 and a guide rod 19 which are sleeved with each other, the end parts of the guide cylinder 18 and the guide rod 19 are respectively welded and fixed with the support 4 and the wheel seat 6, a first spring 20 is sleeved outside the guide cylinder 18 and the guide rod 19, two ends of the first spring 20 are respectively abutted against the support 4 and the wheel seat 6, the wheel seat 6 is ejected outwards under the elastic action of the first spring 20, and the walking wheel 7 is guaranteed to be tightly abutted against the inner wall of an oil pipe of the oil pipe in a rolling manner.
Referring to fig. 1, 2 and 3, a liquid spraying pipe 14 is fixedly sleeved on the outer portion of the motor mounting seat 101, wherein the liquid spraying pipe 14 is an annular circular pipe, the outer wall of the liquid spraying pipe 14 is provided with a plurality of high-pressure nozzles 16 which are uniformly arranged, the lower end of the liquid spraying pipe 14 is welded and communicated with a liquid inlet joint 15, the liquid inlet joint 15 is connected with the existing pump equipment through a liquid inlet pipe, the cleaning agent is extracted under the operation of the pump equipment, and is guided into the liquid spraying pipe 14, and finally the cleaning agent is sprayed to the inner wall of the oil pipe by the plurality of high-pressure nozzles 16 arranged on the outer wall of the liquid spraying pipe 14, so that the cleaning agent dissolves oil dirt on the inner wall of the oil pipe. The mechanical rust cleaning device that 3 outsides of pivot are connected includes that the formula scale removal subassembly is swept to the brush and the formula scale removal subassembly is scraped, the formula scale removal subassembly is swept to the brush includes three groups and 3 wall connections in pivot and is the first telescopic link group 8 of 120 degrees angle settings in interval, and the outer tip of first telescopic link group 8 is connected with brush extension board 10, brush extension board 10 is convex plate body, and the surface bonding of brush extension board 10 is fixed with hairbrush 11, when motor 2 orders about pivot 3 and rotates, the bonded hairbrush 11 of brush extension board 10 outer wall scrubs oil pipe's inner wall, spray the sanitizer of liquid spray pipe 14 injection at the oil pipe inner wall simultaneously and carry on evenly.
Further, scrape formula scale removal subassembly and include three groups and 3 wall connections of pivot and be the second telescopic link group 9 that the interval 120 degrees angle set up, and the outer tip of second telescopic link group 9 is connected with scraper extension board 12, scraper extension board 12 is the convex plate body, and the outer skin welding of scraper extension board 12 has many scrapers 13, many scrapers 13 are slant welded fastening at the outer wall of scraper extension board 12, when motor 2 orders about pivot 3 and rotates, scraper 13 that scraper extension board 12 outer wall welded carries out effectual scraping to the dirt of oil pipe inner wall, guarantee the clean effect to the oil pipe inner wall.
As shown in fig. 3 and 5, the first telescopic rod group 8 and the second telescopic rod group 9 are both composed of a telescopic outer cylinder 21 and a telescopic inner rod 22 which are sleeved with each other, and a second spring 23 is connected between the inner end of the telescopic inner rod 22 and the inside of the telescopic outer cylinder 21, and the brush support plate 10 and the scraper support plate 12 are pushed out to the outside under the elastic force of the second spring 23, so that the steel brush 11 and the scraper 13 are ensured to be in close contact with the inner wall of the oil pipe, and dirt is effectively scrubbed and scraped.
The working principle of the invention is as follows:
when the invention is used, the invention is placed in an oil pipe, the walking wheels 7 arranged in the invention are in rolling contact with the inner wall of the oil pipe, and the traction rope is dragged by the traction ring 17 arranged at one end of the traction telescopic binding motor 2, so that the invention can walk in the oil pipe;
in the process of walking inside the oil pipe, the cleaning agent is extracted under the work of the pump, the cleaning agent is guided into the liquid spraying pipe 14, and finally the cleaning agent is sprayed to the inner wall of the oil pipe through the high-pressure nozzles 16 arranged on the outer wall of the liquid spraying pipe 14, so that the cleaning agent dissolves oil dirt on the inner wall of the oil pipe; meanwhile, the motor 2 is powered on to drive the rotating shaft 3 to rotate, so that a mechanical derusting device arranged on the outer wall of the rotating shaft 3 is driven to descale the inner wall of the oil pipe.
When the motor 2 drives the rotating shaft 3 to rotate, the steel brush 11 adhered to the outer wall of the brush support plate 10 in the brush-sweeping type descaling assembly brushes the inner wall of the oil pipe, and simultaneously, the cleaning agent sprayed on the inner wall of the oil pipe by the liquid spraying pipe 14 is uniform;
when motor 2 orders about pivot 3 and rotates, scrape among the formula scale removal subassembly scraper extension board 12 outer wall welded scraper 13 and carry out effectual scraping to the dirt of oil pipe inner wall, guarantee to the clean effect of oil pipe inner wall, combine the clear water to wash oil pipe inside at last, can dash out the dirt.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (12)
1. The utility model provides a petroleum pipeline inner wall scale removal device, includes frame (1), motor (2) and mechanical rust cleaning device, its characterized in that: frame (1) includes motor mount pad (101) and motor mount pad (101) one side integrated into one piece's three walking wheel supports (102) and constitutes, and motor mount pad (101) one side is through bolt fixedly connected with motor (2), and motor mount pad (101) is run through to the output shaft of motor (2), and the output axle head of motor (2) has pivot (3) through the coupling joint, and the outer wall of pivot (3) is provided with mechanical rust cleaning device.
2. The oil pipeline inner wall descaling device according to claim 1, characterized in that: three outer wall integrated into one piece of walking wheel support (102) has support (4), and the left and right sides of support (4) is connected with wheel seat (6) through walking wheel supporting rod group (5), and rotation is connected with walking wheel (7) in wheel seat (6).
3. The oil transportation pipeline inner wall descaling device according to claim 2, characterized in that: two walking wheel support rod sets (5) connected with the support (4) are obliquely arranged at an angle of 30-45 degrees towards the two outer sides respectively, and the rolling direction of the walking wheels (7) is consistent with the direction of the central axis of the output shaft of the motor (2).
4. The oil pipeline inner wall descaling device according to claim 3, characterized in that: walking wheel supporting rod group (5) are including guide cylinder (18) and guide bar (19) that overlap each other, and the tip of guide cylinder (18) and guide bar (19) is respectively with support (4) and wheel seat (6) welded fastening, and the outside cover of guide cylinder (18) and guide bar (19) is equipped with first spring (20), and just first spring (20) both ends are inconsistent with support (4) and wheel seat (6) respectively.
5. The oil pipeline inner wall descaling device according to claim 1, characterized in that: the outside cover of motor mount pad (101) is equipped with spray tube (14), spray tube (14) are annular pipe body, and spray tube (14) outer wall is provided with a plurality of high pressure nozzle (16) of evenly arranging the setting.
6. The oil pipeline inner wall descaling device according to claim 5, characterized in that: the lower end of the liquid spraying pipe (14) is welded and communicated with a liquid inlet connector (15), and the liquid inlet connector (15) is connected with a pump machine through a liquid inlet pipe.
7. The oil pipeline inner wall descaling device according to claim 1, characterized in that: the mechanical rust removing device connected to the outside of the rotating shaft (3) comprises a brush sweeping type descaling component and a scraping type descaling component, wherein the brush sweeping type descaling component comprises three groups of first telescopic rod groups (8) which are connected with the outer wall of the rotating shaft (3) and arranged at an interval of 120 degrees, and brush supporting plates (10) connected to the outer end parts of the first telescopic rod groups (8).
8. The oil pipeline inner wall descaling device according to claim 7, characterized in that: the brush support plate (10) is a circular arc-shaped plate body, and a steel brush (11) is fixedly bonded on the outer surface of the brush support plate (10).
9. The oil pipeline inner wall descaling device according to claim 7, characterized in that: the scraping type descaling assembly comprises three groups of second telescopic rod groups (9) which are connected with the outer wall of the rotating shaft (3) and arranged at an angle of 120 degrees at intervals, and scraper supporting plates (12) connected with the outer end parts of the second telescopic rod groups (9).
10. The oil transportation pipeline inner wall descaling device according to claim 9, characterized in that: the scraper support plate (12) is a circular arc-shaped plate body, a plurality of scrapers (13) are welded on the outer surface of the scraper support plate (12), and the plurality of scrapers (13) are obliquely welded and fixed on the outer wall of the scraper support plate (12).
11. The oil transportation pipeline inner wall descaling device according to claim 7 or 9, wherein: the first telescopic rod group (8) and the second telescopic rod group (9) are respectively composed of a telescopic outer cylinder (21) and a telescopic inner rod (22) which are mutually sleeved, and a second spring (23) is connected between the inner end of the telescopic inner rod (22) and the inside of the telescopic outer cylinder (21).
12. The oil pipeline inner wall descaling device according to claim 1, characterized in that: one end of the motor (2) far away from the output shaft is welded with a traction ring (17), and a traction rope is bound on the traction ring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460469.9A CN111589808A (en) | 2020-05-27 | 2020-05-27 | Oil pipeline inner wall scale removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460469.9A CN111589808A (en) | 2020-05-27 | 2020-05-27 | Oil pipeline inner wall scale removal device |
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| Publication Number | Publication Date |
|---|---|
| CN111589808A true CN111589808A (en) | 2020-08-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010460469.9A Pending CN111589808A (en) | 2020-05-27 | 2020-05-27 | Oil pipeline inner wall scale removal device |
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| CN (1) | CN111589808A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112044887A (en) * | 2020-09-08 | 2020-12-08 | 汤炬 | Sewage treatment is with high-efficient pipeline desilting equipment |
| CN112337908A (en) * | 2020-12-06 | 2021-02-09 | 江苏盐西土地整理开发有限公司 | Pipeline inner wall cleaning equipment |
| CN112361120A (en) * | 2020-10-15 | 2021-02-12 | 天津大学 | Non-excavation formula pipeline maintenance all-in-one |
| CN112371662A (en) * | 2020-10-12 | 2021-02-19 | 张琦 | A pipeline inner wall cleaning device for car maintenance |
| CN112392047A (en) * | 2020-11-06 | 2021-02-23 | 李飞虎 | Core filling processing method for precast concrete pipe pile |
| CN112588742A (en) * | 2020-11-27 | 2021-04-02 | 王烨峰 | Concrete pouring pipeline cleaning equipment for building foundation |
| CN112588743A (en) * | 2020-11-30 | 2021-04-02 | 黄桂华 | Pipeline cleaning device for hydraulic engineering |
| CN112756348A (en) * | 2020-12-17 | 2021-05-07 | 石家庄怡鑫科技开发有限公司 | Scraping device |
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| CN112044887A (en) * | 2020-09-08 | 2020-12-08 | 汤炬 | Sewage treatment is with high-efficient pipeline desilting equipment |
| CN112371662A (en) * | 2020-10-12 | 2021-02-19 | 张琦 | A pipeline inner wall cleaning device for car maintenance |
| CN112361120A (en) * | 2020-10-15 | 2021-02-12 | 天津大学 | Non-excavation formula pipeline maintenance all-in-one |
| CN112392047B (en) * | 2020-11-06 | 2021-12-14 | 浙江恒宸建设集团有限公司 | Core filling processing method for precast concrete pipe pile |
| CN112392047A (en) * | 2020-11-06 | 2021-02-23 | 李飞虎 | Core filling processing method for precast concrete pipe pile |
| CN112588742A (en) * | 2020-11-27 | 2021-04-02 | 王烨峰 | Concrete pouring pipeline cleaning equipment for building foundation |
| CN112588743A (en) * | 2020-11-30 | 2021-04-02 | 黄桂华 | Pipeline cleaning device for hydraulic engineering |
| CN112588743B (en) * | 2020-11-30 | 2021-09-03 | 广州珠科院工程勘察设计有限公司 | Pipeline cleaning device for hydraulic engineering |
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Application publication date: 20200828 |