CN107088792A - Bending pipe fitting inner wall polishing method - Google Patents
Bending pipe fitting inner wall polishing method Download PDFInfo
- Publication number
- CN107088792A CN107088792A CN201710338881.1A CN201710338881A CN107088792A CN 107088792 A CN107088792 A CN 107088792A CN 201710338881 A CN201710338881 A CN 201710338881A CN 107088792 A CN107088792 A CN 107088792A
- Authority
- CN
- China
- Prior art keywords
- wall
- wheel disc
- working media
- pipe fitting
- regulation
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
- B24B29/06—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction
- B24B29/08—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction the cross-section being circular, e.g. tubes, wires, needles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses bending pipe fitting inner wall polishing method, comprise the following steps：Working media is injected into the oil bend pipe gripped, the grinding head that two semicircle spheroids and wheel disc are constituted is entered in bend pipe, working media quickly flows out in the gap between grinding head and elbow internal wall, the working media of flowing drives wheel disc freely to rotate, wheel disc is by working media rotating-spray to the tube wall of part, auxiliary polishing is carried out to elbow internal wall with this, operation medium is on tube wall, the corner on elbow internal wall or protuberance are graded shear removal by the high-speed motion of abrasive grain, also the iron filings come off on tube wall are cleared up while working media impacts tube wall.Pass through the regulation of two semicircle spheroids and wheel disc so that working media can cover the various pieces of pipe bent position comprehensively, the probability of ledge occurs in the part for reducing elbow member inwall, to realize the purpose for improving petroleum pipeline service life.
Description
Technical field
The present invention relates to bend pipe inner surface treatment field, bending pipe fitting inner wall polishing method is specifically referred to.
Background technology
Petroleum pipeline is transported, and except the influence of pipeline external factor, the roughness of inner-walls of duct can also influence oil to transmit
Efficiency, particularly oil pipe bent position inner surface irregular projection, not only oil can be caused to hinder the flow velocity for delaying oil,
Corrosion of the oil to pipeline can also be accelerated.Traditional tube wall polishing generally uses abrasive water jet polishing technology, but beating of using
Bistrique often with inner-walls of duct friction, and easily corroded by polishing liquid, the abrasion of grinding head ultimately resulted in, in reduction bend pipe
The polishing efficiency on surface.
The content of the invention
It is an object of the invention to provide bending pipe fitting inner wall polishing method, to solve drawbacks described above.
The purpose of the present invention is achieved through the following technical solutions：
Bending pipe fitting inner wall polishing method, comprises the following steps：Work is injected into the oil bend pipe gripped
Make medium, the grinding head that two semicircle spheroids and wheel disc are constituted is entered in bend pipe, and working media is out of grinding head and bend pipe
Quickly flowed out in gap between wall, the working media of flowing drives wheel disc freely to rotate, and the work of part is situated between by wheel disc
On matter rotating-spray to tube wall, auxiliary polishing is carried out to elbow internal wall with this, operation medium is on tube wall, by abrasive material
The high-speed motion of grain grades shear removal to the corner on elbow internal wall or protuberance, while working media impacts tube wall
Also the iron filings come off on tube wall are cleared up；
Wherein, sleeve is provided with the middle part of the central shaft, bar is provided with along the axis outer wall in the middle of the central shaft
The projection of shape, is provided with the groove with the protrusions match on sleeve inner peripheral wall, and projection can exist around the axis of central shaft
Freely rotated in groove, wheel disc is installed on excircle of sleeve perisporium, the wheel disc includes body, and the body is arranged on sleeve
On, composition leaf groove between multiple curved blades, two neighboring blade is provided with the both sides of the body, in the semicircle
The end of the upper and lower ends of spheroid is mounted on pulley；Also include multiple regulation rudders, multiple regulation rudders pass through axis of rotation
It is arranged on the two side of body, and multiple regulation rudders are distributed with multiple blade staggers.
It is not in place and cause its service life to fall sharply for inner surface treatment of the petroleum pipeline in the prior art before dispatching from the factory
Defect, inventor designs a kind of inner surface sanding and polishing structure dedicated for petroleum pipeline pipe bent position, passes through two semicircles
The regulation of spheroid and wheel disc so that polishing liquid energy enough covers the various pieces of pipe bent position comprehensively, reduces the office of elbow member inwall
There is the probability of projection in portion, to realize the purpose for improving petroleum pipeline service life；During work, two semi-round balls for being oppositely arranged
Body can be protected when liquid of polishing quickly flows to wheel disc, and can be in bend pipe in the pulley that semicircle spheroid upper and lower ends are set
Wall carries out slidably, to avoid causing both abrasions because of the excessive friction of semicircle spheroid and tube wall, extending grinding head
Service life, semicircle spheroid is connected with central axle threads so that the quick-replaceable after wheel disc is impaired, improves the reality of grinding head
The property used.Wherein, wheel disc is made up of the blade of body and the alloy material being welded on body, ensures wheel disc in mill with this
Expect the stability under the prolonged impact of particle, not only consider to reduce the exclusion of blade and rubbing for blade surface on body
Wipe, it is also contemplated that the runner of body blade has enough length, to ensure the stability and blade of liquid flowing to fluid
Abundant effect, therefore use multiple blades, with increase polishing liquid rotary speed, improve wheel disc auxiliary polishing efficiency.
Further, wheel disc is fixed on sleeve, and the rotation of sleeve is rotated by projection and limited, because groove is not
Complete annular groove, i.e. sleeve can not carry out 360 degree and rotate freely, because two semicircle spheroids and wheel disc are done in elbow member
Erratic motion, if 360 degree of wheel disc is rotated freely, is easily caused the grinding head of two semicircle spheroids and wheel disc composition in bend pipe
It is detained on interior certain point position, i.e., the inwall of the point position is polished repeatedly, and when projection is moved to the extreme position of groove,
Sleeve can not carry out 360 degree and rotate freely, with the impact of polishing liquid, and the position of two semicircle spheroids can change, i.e. edge
Polishing liquid flow direction continue to move to, by polishing liquid drive under, wheel disc is rotated again, with carry out to elbow internal wall other
Point position carries out sanding and polishing, and then substantially reduces the man-hour of elbow member inwall processing.Also, between two adjacent blades
Rotation is provided with regulation rudder so that when grinding head is detained in elbow member at the position of certain point, being capable of 360 degree of freedom using rudder is adjusted
Polishing liquid near the ability of rotation, agitation blades so that a nondirectional active force is produced to grinding head, and then driving is beaten
Bistrique is moved on, to ensure that grinding head realizes continuous polishing.
Be provided with U-lag on the semicircle spheroid, be provided with blind hole in U-lag bottom, the two ends end of central shaft with it is blind
Hole screw thread coordinates.U-lag is provided with semicircle spheroid so that the interval region between two semicircle spheroids is relatively large, with full
Smooth installation, the work of the various sizes of wheel disc of foot, and the blind threaded cooperation in central shaft and U-lag, can be realized pair
The quick-replaceable of wheel disc, and the size in control interval region in right amount, are reached most preferably with the rotational efficienty for ensuring wheel disc.
Multiple adjustment holes are also provided with the body, the adjustment hole annular array is distributed in body axis surrounding.Body
On the adjustment hole that is provided with may be such that pressure balance before and after body, keep slow-roll stabilization, reduce vibration, it is ensured that the work effect of wheel disc
Rate.
The regulation rudder is in arc-shaped.Preferably, regulation rudder is in arc-shaped as blade so that regulation rudder is in air exercise
Produced swirling fluid intensity is bigger during grinding fluid progress agitation regulation, and then accelerates grinding head to break away from dead state, carries indirectly
The auxiliary grinding efficiency of high grinding head.
The bending direction of the regulation rudder is identical with the bending direction of the blade.Preferably, regulation rudder and blade
Bending direction is identical, can reduce the interference obstruction that both mutually produce in agitation polishing liquid, then improve polishing liquid to curved
The impact dynamics of pipe fitting inner wall, shortens the processing man-hour of ledge or edge on elbow member inwall.
Along the radial direction of the body, the length of the regulation rudder is less than the length of blade.Preferably, in the footpath along body
To on direction, the length of regulation rudder is less than the length of blade, ensure that realization stirred with blade based on the eddy flow to be formed, regulation
Rudder stirs the fluid-mixing supplemented by the eddy flow to be formed, and then realizes in the increase unit interval to the certain point position on elbow member inwall
Sanding and polishing effect.
The present invention compared with prior art, has the following advantages and advantages：
1st, bending pipe fitting inner wall polishing method of the present invention, when projection is moved to the extreme position of groove, sleeve without
Method carries out 360 degree and rotated freely, with the impact of polishing liquid, and the position of two semicircle spheroids can change, i.e., along polishing liquid
Flow direction continue to move to, by polishing liquid drive under, wheel disc is rotated again, with carry out to elbow internal wall other point positions enter
Row sanding and polishing, and then substantially reduce the man-hour of elbow member inwall processing；
2nd, bending pipe fitting inner wall polishing method of the present invention, rotates between two adjacent blades and is provided with regulation
Rudder so that when grinding head is detained in elbow member at the position of certain point, using adjust rudder can 360 degree of abilities for freely rotating, stir
Polishing liquid near movable vane piece so that a nondirectional active force is produced to grinding head, and then drives grinding head to move on,
To ensure that grinding head realizes continuous polishing；
3rd, bending pipe fitting inner wall polishing method of the present invention, regulation rudder is identical with the bending direction of blade, can reduce
The interference that both mutually produce in agitation polishing liquid is obstructed, and then improves impact dynamics of the polishing liquid to elbow member inwall, contracting
The processing man-hour of ledge or edge on short elbow member inwall.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural representation of wheel disc.
Mark and corresponding parts title in accompanying drawing：
1- semicircles spheroid, 2- wheel discs, 3- fasteners, 4- central shafts, 5- pulleys, 6- bodies, 7- blades, 8- projections, 9- regulations
Hole, 10-U shapes groove, 11- sleeves, 12- regulation rudders.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment 1
As depicted in figs. 1 and 2, the present embodiment comprises the following steps：Work is injected into the oil bend pipe gripped
Medium, the grinding head that two semicircle spheroids and wheel disc are constituted is entered in bend pipe, and working media is from grinding head and elbow internal wall
Between gap in quickly flow out, the working media of flowing drives wheel disc freely to rotate, and wheel disc is by the working media of part
On rotating-spray to tube wall, auxiliary polishing is carried out to elbow internal wall with this, operation medium is on tube wall, by abrasive grain
High-speed motion the corner on elbow internal wall or protuberance are graded shear removal, while working media impacts tube wall
By the iron filings come off on tube wall cleaning；
Wherein, sleeve 11 is provided with the middle part of the central shaft 4, is set along the axis outer wall in the middle of the central shaft 4
There is the projection 8 of strip, the groove coordinated with the projection 8 is provided with the inner peripheral wall of sleeve 11, and projection 8 can be around central shaft
4 axis is freely rotated in groove, wheel disc 2 is provided with the outer circle wall of sleeve 11, the wheel disc 2 includes body 6, described
Body 6 is arranged on sleeve 11, is provided with multiple curved blades 7 in the both sides of the body 6, two neighboring blade 7 it
Between constitute leaf groove, be mounted on pulley 5 in the end of the upper and lower ends of the semicircle spheroid 1；Also include multiple regulation rudders 12, it is many
The individual regulation rudder 12 is arranged on by axis of rotation on the two side of body 6, and multiple regulation rudders 12 and multiple blades 7
It is interspersed.
It is not in place and cause its service life to fall sharply for inner surface treatment of the petroleum pipeline in the prior art before dispatching from the factory
Defect, inventor designs a kind of inner surface sanding and polishing structure dedicated for petroleum pipeline pipe bent position, passes through two semicircles
The regulation of spheroid 1 and wheel disc 2 so that polishing liquid energy enough covers the various pieces of pipe bent position comprehensively, reduces elbow member inwall
There is the probability of projection in part, to realize the purpose for improving petroleum pipeline service life；During work, two are oppositely arranged
Semicircle spheroid 1 can be protected when liquid of polishing quickly flows to wheel disc 2, and the pulley 5 set in the upper and lower ends of semicircle spheroid 1
It can carry out slidably, to avoid causing both abrasions because of the excessive friction of semicircle spheroid 1 and tube wall, prolonging in elbow internal wall
The service life of grinding head is grown, semicircle spheroid 1 is threadedly coupled with central shaft 4 so that the quick-replaceable after wheel disc 2 is impaired, carried
The high practicality of grinding head.Wherein, wheel disc 2 is made up of body 6 and the blade for the alloy material being welded on body 67,
Ensure stability of the wheel disc 2 under the prolonged impact of abrasive grain with this, not only consider to reduce blade on body 6
7 exclusion and the friction on the surface of blade 7, it is also contemplated that the runner of the blade 7 of body 6 has enough length, to ensure liquid flow
Abundant effect of the dynamic stability and blade 7 to fluid, therefore multiple blades 7 are used, to increase the rotary speed of polishing liquid,
Improve the efficiency of the auxiliary polishing of wheel disc 2.
Further, wheel disc 2 is fixed on sleeve 11, and the rotation of sleeve 11 is rotated by projection 8 and limited, because recessed
Groove and incomplete annular groove, i.e. sleeve 11 can not carry out 360 degree and rotate freely, because two semicircle spheroids 1 and wheel disc 2 exist
Erratic motion is done in elbow member, if 2360 degree of wheel disc is rotated freely, two semicircle spheroids 1 is easily caused and wheel disc 2 is constituted
Grinding head be detained in bend pipe on the position of certain point, i.e., the inwall of the point position is polished repeatedly, and be moved in projection 8 recessed
During the extreme position of groove, sleeve 11 can not carry out 360 degree and rotate freely, with the impact of polishing liquid, the position of two semicircle spheroids 1
Putting to change, i.e., continued to move to along the flow direction of polishing liquid, by the way that under the drive of polishing liquid, wheel disc 2 is rotated again, to open
Open up and sanding and polishing is carried out to other point positions of elbow internal wall, and then substantially reduce the man-hour of elbow member inwall processing.Also,
Rotated between two adjacent blades 7 and be provided with regulation rudder 12 so that when grinding head is detained in elbow member at the position of certain point, profit
Being capable of 360 degree abilities for freely rotating, the polishing liquid near agitation blades 7 so as to grinding head generation one with regulation rudder 12
Nondirectional active force, and then drive grinding head to move on, to ensure that grinding head realizes continuous polishing.
Further, U-lag 10 is provided with the semicircle spheroid 1, the bottom of U-lag 10 is provided with blind hole, central shaft 4
Two ends end with it is blind threaded coordinate.U-lag 10 is provided with semicircle spheroid 1 so that the interval between two semicircle spheroids 1
Region is relatively large, to meet smooth installation, the work of various sizes of wheel disc 2, and central shaft 4 with it is blind in U-lag 10
Hole screw thread coordinates, and the quick-replaceable to wheel disc 2, and the size in control interval region in right amount can be realized, to ensure wheel disc 2
Rotational efficienty reaches most preferably.
The present embodiment also includes fastener 3, and the fastener 3 is arranged on the side wall of the semicircle spheroid 1.In use, by steel
Rope is connected with fastener 3, under the driving in pulling equipment, ensure that the auxiliary polishing structure that two semicircle spheroids 1 are constituted
Motion more rule in elbow member, prevents stuck some position in elbow member of polishing structure.
Preferably, being also provided with multiple adjustment holes 9 on the body 6, the annular array of adjustment hole 9 is distributed in body 6
Axis surrounding.The adjustment hole 9 being provided with body 6 may be such that the pressure balance before and after body 6, keep slow-roll stabilization, reduce vibration,
Ensure the operating efficiency of wheel disc 2.
Preferably, regulation rudder 12 is in arc-shaped as blade 7 so that regulation rudder 12 carries out agitation tune in air exercise grinding fluid
Produced swirling fluid intensity is bigger during section, and then accelerates grinding head to break away from dead state, and the auxiliary of grinding head is improved indirectly
Grinding efficiency.
Preferably, regulation rudder 12 is identical with the bending direction of blade 7, both can be reduced mutual in agitation polishing liquid
The interference of generation is obstructed, and is then improved impact dynamics of the polishing liquid to elbow member inwall, is shortened ledge on elbow member inwall
Or the processing man-hour of edge.
Preferably, being less than the length of blade 7 in the length that rudder 12 in the radial direction, is adjusted along body 6, it ensure that
Realize with blade 7 stir formed eddy flow based on, regulation rudder 12 agitation formed eddy flow supplemented by fluid-mixing, and then realize increase
Plus the sanding and polishing effect in the unit interval to the certain point position on elbow member inwall.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (6)
1. bending pipe fitting inner wall polishing method, it is characterised in that comprise the following steps：To the oil bend pipe gripped
Interior injection working media, the grinding head that two semicircle spheroids (1) and wheel disc (2) are constituted is entered in bend pipe, working media from
Quickly flowed out in gap between grinding head and elbow internal wall, the working media of flowing drives wheel disc (2) freely to rotate, and takes turns
Disk (2) carries out auxiliary polishing, operation medium with this by working media rotating-spray to the tube wall of part to elbow internal wall
On tube wall, the corner on elbow internal wall or protuberance are graded shear removal by the high-speed motion of abrasive grain, in work
Also the iron filings come off on tube wall are cleared up while making media impingement tube wall；
Wherein, sleeve (11) is provided with the middle part of the central shaft (4), along the axis outer wall in the middle of the central shaft (4)
Projection (8) provided with strip, is provided with the groove coordinated with the projection (8), and projection (8) energy on sleeve (11) inner peripheral wall
Enough axis around central shaft (4) are freely rotated in groove, and wheel disc (2), the wheel are provided with sleeve (11) outer circle wall
Disk (2) includes body (6), and the body (6) is arranged on sleeve (11), is provided with the both sides of the body (6) and multiple is in
Leaf groove is constituted between the blade (7) of arc, two neighboring blade (7), it is equal in the end of the upper and lower ends of the semicircle spheroid (1)
Pulley (5) is installed；Also include multiple regulation rudders (12), multiple regulation rudders (12) are arranged on body by axis of rotation
(6) on two side, and multiple regulation rudders (12) are interspersed with multiple blades (7).
2. bending pipe fitting inner wall polishing method according to claim 1, it is characterised in that：In the semicircle spheroid
(1) U-lag (10) is provided with, U-lag (10) bottom is provided with blind hole, the two ends end of central shaft (4) is matched somebody with somebody with blind threaded
Close.
3. bending pipe fitting inner wall polishing method according to claim 1, it is characterised in that：On the body (6) also
Multiple adjustment holes (9) are provided with, adjustment hole (9) annular array is distributed in body (6) axis surrounding.
4. bending pipe fitting inner wall polishing method according to claim 1, it is characterised in that：It is described regulation rudder (12) be in
Arc-shaped.
5. bending pipe fitting inner wall polishing method according to claim 4, it is characterised in that：The regulation rudder (12)
Bending direction is identical with the bending direction of the blade (7).
6. bending pipe fitting inner wall polishing method according to claim 1, it is characterised in that：Along the body (6)
Radially, the length of the regulation rudder (12) is less than the length of blade (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338881.1A CN107088792A (en) | 2017-05-15 | 2017-05-15 | Bending pipe fitting inner wall polishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338881.1A CN107088792A (en) | 2017-05-15 | 2017-05-15 | Bending pipe fitting inner wall polishing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107088792A true CN107088792A (en) | 2017-08-25 |
Family
ID=59638452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710338881.1A Pending CN107088792A (en) | 2017-05-15 | 2017-05-15 | Bending pipe fitting inner wall polishing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107088792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997146A (en) * | 2021-12-07 | 2022-02-01 | 江苏鸿迅机车有限公司 | Electric vehicle frame dog-ear frock of polishing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06155255A (en) * | 1992-11-11 | 1994-06-03 | Mitsubishi Heavy Ind Ltd | Pipe inner surface grinding device |
| CN202846279U (en) * | 2012-09-03 | 2013-04-03 | 舒能（苏州）工业技术有限公司 | Elbow pipe grinding tool |
| CN104511808A (en) * | 2013-09-29 | 2015-04-15 | 中国石油天然气股份有限公司 | Polishing device for coating in oil pipe |
| CN105033791A (en) * | 2015-07-30 | 2015-11-11 | 四川金锋建设有限公司 | Use method for pulling and releasing mechanisms for petroleum pipeline inner surface polishing |
| CN105127849A (en) * | 2015-09-02 | 2015-12-09 | 四川金锋建设有限公司 | Polishing method for inner surface of elbow pipe |
-
2017
- 2017-05-15 CN CN201710338881.1A patent/CN107088792A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06155255A (en) * | 1992-11-11 | 1994-06-03 | Mitsubishi Heavy Ind Ltd | Pipe inner surface grinding device |
| CN202846279U (en) * | 2012-09-03 | 2013-04-03 | 舒能（苏州）工业技术有限公司 | Elbow pipe grinding tool |
| CN104511808A (en) * | 2013-09-29 | 2015-04-15 | 中国石油天然气股份有限公司 | Polishing device for coating in oil pipe |
| CN105033791A (en) * | 2015-07-30 | 2015-11-11 | 四川金锋建设有限公司 | Use method for pulling and releasing mechanisms for petroleum pipeline inner surface polishing |
| CN105127849A (en) * | 2015-09-02 | 2015-12-09 | 四川金锋建设有限公司 | Polishing method for inner surface of elbow pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997146A (en) * | 2021-12-07 | 2022-02-01 | 江苏鸿迅机车有限公司 | Electric vehicle frame dog-ear frock of polishing |
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Application publication date: 20170825 |