CN105437010B - A kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency - Google Patents

A kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency Download PDF

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Publication number
CN105437010B
CN105437010B CN201511014454.5A CN201511014454A CN105437010B CN 105437010 B CN105437010 B CN 105437010B CN 201511014454 A CN201511014454 A CN 201511014454A CN 105437010 B CN105437010 B CN 105437010B
Authority
CN
China
Prior art keywords
mounting seat
wire wheel
steel pipe
high frequency
seat
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.)
Expired - Fee Related
Application number
CN201511014454.5A
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Chinese (zh)
Other versions
CN105437010A (en
Inventor
仲崇胜
裴银柱
穆冬生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PANYU ZHUJIANG STEEL PIPE (LIANYUNGANG) CO Ltd
Original Assignee
PANYU ZHUJIANG STEEL PIPE (LIANYUNGANG) CO Ltd
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Filing date
Publication date
Application filed by PANYU ZHUJIANG STEEL PIPE (LIANYUNGANG) CO Ltd filed Critical PANYU ZHUJIANG STEEL PIPE (LIANYUNGANG) CO Ltd
Priority to CN201511014454.5A priority Critical patent/CN105437010B/en
Publication of CN105437010A publication Critical patent/CN105437010A/en
Application granted granted Critical
Publication of CN105437010B publication Critical patent/CN105437010B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/04Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/033Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety 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
    • B24B55/06Dust extraction equipment on grinding or polishing machines

Abstract

The present invention relates to a kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency, it is characterised in that the polishing derusting mechanism includes mill arm(1), connecting seat(2), support wheel group(3), wire wheel mounting seat(5)With telescopic spring mechanism, the connecting seat(2)Top is installed by support wheel group(3)With telescopic spring mechanism, the connecting seat(2)With wire wheel mounting seat(5)Bottom is connected by hinge, top by telescopic spring mechanism, the wire wheel mounting seat(5)It is installed above to have motor mount(12), the motor mount(12)With hydraulic motor(11)It is bolted fastening, the hydraulic motor(11)Sprocket wheel, the wire wheel mounting seat are installed on output shaft(5)Front end is installed by wire wheel(14), the wire wheel(14)With hydraulic motor(11)Pass through chain drive.The device overall construction design is ingenious, easy to operate, conveniently, safely, efficiently.

Description

A kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency
Technical field
The present invention relates to one kind polishing derusting mechanism, and in particular to a kind of pre- postwelding inside weld polishing rust remover of steel pipe high frequency Structure, belongs to steel pipe manufacture and manufacture field.
Background technology
At present, submerged-arc welded (SAW) pipe technological process is general all after prewelding is molded, then carries out inside and outside submerged-arc welding.I takes charge of creation Property invention using the shaping of high frequency prewelding, then carry out the technological process of submerged-arc welding, and it is efficient produce qualified finished product, into Work(is applied among multiple orders.But there is problems with the pre- postwelding of high frequency:1. it is located in coastal area, water, sky because I takes charge of Salinity is heavier in gas, and the pre- postwelding of steel pipe, weld seam soaks through emulsion, got rusty at once, so as to cause follow-up submerged arc welding quality not It is stable.
For it is above-mentioned the problem of, existing polishing derusting mode has two kinds:
1st, artificial drilling steel pipe is arranged, polishing derusting is carried out with angle grinder assembling steel wire lump, wastes time and energy, and belong to danger Dangerous operation, it is particularly when caliber is smaller, then artificial very painstaking.
2nd, using the original sander in workshop, but grinding efficiency is low.As shown in figure 1, after steel pipe is molded through high frequency prewelding, Emulsion has been contaminated at 1 in figure, causes to get rusty rapidly in weld seam, simultaneously because the reason of edge milling machines milling groove, causes weldering at 1 Seam is significantly lower than steel pipe internal-surface.If using original sander, as shown in Fig. 2 wire wheel(1)Direction of rotation perpendicular to Weld seam, it is basic to remove the iron rust not fallen in pit.As shown in Fig. 2 original interior grinding machine, grinds arm(2)For seamless steel pipe structure, by force Degree deficiency, when wire wheel enters length of steel pipe more than 6 meters or so, wire wheel without support because acutely beat, seriously partially From weld seam, therefore, above-mentioned technical problem is solved in the urgent need to a kind of new technical scheme.
The content of the invention
In order to solve above-mentioned problem, the invention discloses a kind of pre- postwelding inside weld polishing rust remover of steel pipe high frequency Structure, the device overall construction design is ingenious, easy to operate, conveniently, safely, efficiently.
To achieve these goals, technical scheme is as follows, and a kind of pre- postwelding inside weld polishing of steel pipe high frequency is removed Rust mechanism, it is characterised in that the polishing derusting mechanism includes mill arm, connecting seat, support wheel group, wire wheel mounting seat and bullet Spring telescoping mechanism, the connecting seat top is installed by support wheel group and telescopic spring mechanism, the connecting seat and wire wheel mounting seat Bottom is connected by hinge, top by telescopic spring mechanism, and the wire wheel mounting seat is installed above motor peace Seat is filled, the motor mount is bolted on fastening, the hydraulic motor output shaft with hydraulic motor and installs sprocket wheel, institute State wire wheel mounting seat front end and wire wheel is installed, the wire wheel passes through chain drive with hydraulic motor.The technical scheme is connected Seat is mounted below support wheel group, can effectively support bistrique position to advance to 12.5 meters of steel pipe depths without departing from bead rail, And do not beat;The telescopic spring mechanism at bistrique position in the technical scheme, automatically adjusts wire wheel height, it is ensured that steel by spring Silk wheel is strong all the time to touch weld recess depths, so as to effectively remove iron rust and dust.
As a modification of the present invention, the support wheel group includes four row deep groove ball bearings, two groups of arc rollers, rollers Axle and roller mounting seat, the roller shaft and bearing fit, are assemblied in arc roller, and two groups of arc rollers are arranged on rolling Take turns in mounting seat.
As a modification of the present invention, the telescopic spring mechanism includes guide rod, big stripped nut, small locking screw Mother, spring, rotating seat and the guide copper sleeve inside rotating seat, guide rod rear and front end are provided with one group of locking circle spiral shell Mother, rotating seat is hinged cooperation with connecting seat.
As a modification of the present invention, the motor mount is parallel with wire wheel mounting seat to be installed, the motor peace Fill the fixed hole position of seat and correspond installation with the groove profile hole position of wire wheel mounting seat, and held out against by adjusting screw rod.
As a modification of the present invention, the wire wheel mounting seat front end flange axis hole position is provided with rotating shaft, biserial Bearing, dust ring and gland, rotating shaft output end are provided with wire wheel and locking nut, and rotating shaft input installs sprocket wheel, the liquid Pressure motor realizes that power is transmitted by sprocket wheel, chain and rotating shaft.
As a modification of the present invention, the polishing derusting mechanism also includes in sweep-up pipe, the wire wheel mounting seat Between neutral position sweep-up pipe is installed.
As a modification of the present invention, the hydraulic motor realizes that power is transmitted with rotating shaft by duplex chain.
As a modification of the present invention, the support wheel group is set to arc.
Relative to prior art, advantages of the present invention is as follows, and 1)Whole technical scheme reasonable in design, ingenious, operation It is convenient, 2), wire wheel direction of rotation is consistent with weld seam in the technical scheme, can effectively remove iron rust dust in pit;Mill arm is got rid of Seamless steel pipe structure has been abandoned, rectangular configuration has been welded into using high-strength panel, and in the case of reduction quality to greatest extent, increase Strong mill arm intensity;3)The technical scheme connecting seat is mounted below support wheel group, can effectively support bistrique position to advance to 12.5 Beated without departing from bead rail, and not meter Gang Guan depths;4)The telescopic spring mechanism at bistrique position in the technical scheme, and steel Silk wheel direction of rotation is consistent with bead direction, automatically adjusts wire wheel height by spring, it is ensured that wire wheel is strong all the time Touch weld recess depths, so as to effectively remove iron rust and dust, and one in place, bring great convenience to production;5) The technical scheme installs sweep-up pipe in bistrique, it is to avoid environmental pollution, and mill arm uses high-strength panel welding rectangular configuration, it is ensured that mill Arm high-intensity high-tenacity feature, mill arm front portion is equipped with curved support wheel group;6), the Technical Design it is simple, handling ease, energy The low, processing cost of consumption is low, machining accuracy is high, and service life is long.
Brief description of the drawings
Fig. 1 is that the pre- postwelding inside weld of steel pipe high frequency gets rusty schematic diagram;
Fig. 2 is original interior mill structure schematic diagram;
Fig. 3 is the front view of the present invention;
Fig. 4 is the top view of the present invention;
Fig. 5 is the axonometric schematic diagram of the present invention;
Fig. 6 is wire wheel sectional view;
Fig. 7 is support wheel partial structural diagram
In figure:1st, arm is ground, 2, connecting seat, 3, support wheel group, 4, arc roller, 5, wire wheel mounting seat, 6 chains, 7 chains Wheel, 8, rotating seat, 9, spring, 10, guide rod, 11, hydraulic motor, 12, motor mount, 13, adjusting screw rod, 14, wire wheel, 15th, rotating shaft, 16, locking nut, 17, big stripped nut, 18, small locking nut, 19, sweep-up pipe,
20th, double-row bearing, 21, gland, 22, dust ring, 23, roller shaft, 24, bearing, 25, roller mounting seat.
Embodiment
In order to further enhance the appreciation and understanding of the invention, with reference to the accompanying drawings and detailed description, this is further elucidated Invention.
Embodiment 1:
Referring to Fig. 3-Fig. 5, a kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency, the polishing derusting mechanism bag Mill arm 1, connecting seat 2, support wheel group 3, wire wheel mounting seat 5 and telescopic spring mechanism are included, support is installed on the top of connecting seat 2 Wheel group 3 and telescopic spring mechanism, the connecting seat 2 is with the bottom of wire wheel mounting seat 5 by hinge, and top is stretched by spring Contracting mechanism is connected, and the wire wheel mounting seat 5 is installed above motor mount 12, the motor mount 12 and hydraulic pressure horse It is bolted up to 11 on fastening, the output shaft of hydraulic motor 11 and sprocket wheel is installed, the front end of wire wheel mounting seat 5 is installed Wire wheel 14, the wire wheel 14 passes through chain drive with hydraulic motor 11.The technical scheme connecting seat is mounted below support Wheel group, can effectively support bistrique position to advance to 12.5 meters of steel pipe depths and be beated without departing from bead rail, and not;The technical side The telescopic spring mechanism at bistrique position in case, automatically adjusts wire wheel height, it is ensured that wire wheel is strong all the time by spring Weld recess depths is touched, so as to effectively remove iron rust and dust.
Embodiment 2:
Referring to Fig. 3-Fig. 5, as a modification of the present invention, the support wheel group 3 include four row deep groove ball bearings, two groups Arc roller 4, roller shaft 23 and roller mounting seat 25, the roller shaft 23 are closed with bearing with 24, are assemblied in arc roller 4, Two groups of arc rollers are arranged in roller mounting seat 25.
Embodiment 3:
Referring to Fig. 3-Fig. 5, as a modification of the present invention, the telescopic spring mechanism includes guide rod 10, big locking circle Nut 17, small locking nut 18, spring 9, rotating seat 8 and the guide copper sleeve inside rotating seat, guide rod rear and front end are equal One group of stripped nut is provided with, rotating seat 8 is hinged cooperation with connecting seat 2.
Embodiment 4:
Referring to Fig. 3-Fig. 5, as a modification of the present invention, the motor mount 12 is parallel with wire wheel mounting seat 5 Install, advantage is convenient transmission so that transmission is more steady quick.The fixed hole position of the motor mount 12 is pacified with wire wheel The groove profile hole position for filling seat 5 corresponds installation, and is held out against by adjusting screw rod 13.
Embodiment 5:
Referring to Fig. 3-Fig. 5, as a modification of the present invention, the front end flange axis hole position of wire wheel mounting seat 5 peace Equipped with rotating shaft 15, double-row bearing 20, dust ring 22 and gland 21, the output end of rotating shaft 15 is provided with wire wheel 14 and locking nut 16, the input of rotating shaft 15 installs sprocket wheel, and the hydraulic motor 11 realizes that power is transmitted by sprocket wheel, chain and rotating shaft 15.
Embodiment 6:
Referring to Fig. 3-Fig. 5, as a modification of the present invention, the polishing derusting mechanism also includes sweep-up pipe, the steel The silk wheel central idle position of mounting seat 5 is provided with sweep-up pipe 19, it is to avoid environmental pollution.
Embodiment 7:
Referring to Fig. 3-Fig. 5, as a modification of the present invention, the hydraulic motor 11 passes through duplex chain with rotating shaft 15 Realize that power is transmitted.Because the kind of drive is limited by steel duct space, and transmission torque is larger, therefore uses duplex chain to pass It is dynamic, it is to avoid the heating skidding that belt wheel and belt transmission are brought;The support wheel group is set to arc, realizes polishing nose In steel duct traveling process, moved all the time along weld seam, while polishing nose is avoided because of the bob problem without support, its Remaining structure and advantage are identical with embodiment 1.
Operation principle:Referring to Fig. 1-Fig. 5, a kind of pre- postwelding inside weld polishing derusting mechanism of shown steel pipe high frequency, including Grind arm 1, connecting seat 2, motor mount 12, wire wheel mounting seat 5, support wheel group 3, telescopic spring mechanism and transmission device.Mill Arm 1 uses high-strength panel, and solid is welded into rectangular configuration, it is ensured that mill arm intensity and toughness;Mill arm 1 uses spiral shell with connecting seat 2 Bolt is connected, and the bottom of connecting seat 2 is provided with support wheel group 3.Because it is longer to grind arm, and sander head is heavier, installs support additional Assembling is postponed, and the bracing force of workpiece polishing mechanism front end is effectively ensured, simultaneously as the guide effect of arc wheel group, it is ensured that traveling side To without departing from weld seam.As in Figure 3-5, connecting seat 2 and the bottom hinge of wire wheel mounting seat 5, top is stretched by spring Contracting mechanism is connected, and telescopic spring mechanism includes:Guide rod 10, big locking nut 17, small locking nut 18, spring 9 and rotating seat 8.During working condition, compression spring holds out against wire wheel to lower swing all the time, so that steel wire wheel surface is strong to touch weldering Stitch groove depths.Motor mount 12 is fastened with wire wheel mounting seat 5 by four bolt connections as in Figure 3-5, wire wheel Mounting seat front portion is equipped with adjusting screw rod 13, convenient regulation driving chain elasticity.Hydraulic motor is installed on motor mount 12 11, wire wheel mounting seat front flange axle hole location is provided with rotating shaft 15, biserial deep groove ball bearing, dust ring, gland.Turn The output end of axle 15 is equipped with wire wheel 14 and locking nut 16, and the input of rotating shaft 15 is equipped with sprocket wheel, and rotating shaft 15 is led to hydraulic motor 11 Cross duplex chain and realize that power is transmitted.Because the kind of drive is limited by steel duct space, and transmission torque is larger, therefore uses Double-row-roller Chain conveyer, it is to avoid the heating skidding that belt wheel and belt transmission are brought.Wire wheel mounting seat central idle position Put equipped with sweep-up pipe 19, timely dust suction, it is to avoid environmental pollution.
The present invention can also combine at least one in technical characteristic described in embodiment 2,3,4,5,6,7 with embodiment 1, Form new embodiment.
It should be noted that above-described embodiment is only presently preferred embodiments of the present invention, not for limiting the present invention Protection domain, the equivalent substitution or replacement made on the basis of above-mentioned technical proposal, belong to the present invention protection model Enclose.

Claims (8)

1. a kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency, it is characterised in that the polishing derusting mechanism includes mill Arm(1), connecting seat(2), support wheel group(3), wire wheel mounting seat(5)With telescopic spring mechanism, the connecting seat(2)Pacify on top Fill support wheel group(3)With telescopic spring mechanism, the connecting seat(2)With wire wheel mounting seat(5)Bottom by hinge, on Portion is connected by telescopic spring mechanism, the wire wheel mounting seat(5)It is installed above to have motor mount(12), the motor Mounting seat(12)With hydraulic motor(11)It is bolted fastening, the hydraulic motor(11)Sprocket wheel is installed, institute on output shaft State wire wheel mounting seat(5)Front end is installed by wire wheel(14), the wire wheel(14)With hydraulic motor(11)Pass through chain drive.
2. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 1, it is characterised in that the support Wheel group(3)Including four row deep groove ball bearings(24), two groups of arc rollers(4), roller shaft(23)With roller mounting seat(25), it is described Roller shaft and bearing fit, are assemblied in arc roller(4)In, two groups of arc rollers are arranged in roller mounting seat.
3. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 2, it is characterised in that the spring Telescoping mechanism includes guide rod(10), spring(9), rotating seat(8)With the guide copper sleeve inside rotating seat, two before and after guide rod End is provided with one group of stripped nut, rotating seat(8)With connecting seat(2)It is hinged cooperation.
4. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 3, it is characterised in that the motor Mounting seat(12)With wire wheel mounting seat(5)It is parallel to install, the motor mount(12)Fixed hole position and wire wheel install Seat(5)Groove profile hole position correspond and install, and pass through adjusting screw rod(13)Hold out against.
5. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 4, it is characterised in that:The steel wire Take turns mounting seat(5)Front end flange axis hole position is provided with rotating shaft(15), double-row bearing (20), dust ring (22) and gland (21), Rotating shaft(15)Output end is provided with wire wheel(14)And locking nut(16), rotating shaft(15)Input installs sprocket wheel, the hydraulic pressure Motor(11)Pass through sprocket wheel, chain and rotating shaft(15)Realize that power is transmitted.
6. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 3 or 4, it is characterised in that described Derusting mechanism of polishing also includes sweep-up pipe, the wire wheel mounting seat(5)Central idle position is provided with sweep-up pipe(19).
7. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 5, it is characterised in that the hydraulic pressure Motor(11)With rotating shaft(15)Realize that power is transmitted by duplex chain.
8. the pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency according to claim 5, it is characterised in that the support Wheel group is set to arc.
CN201511014454.5A 2015-12-31 2015-12-31 A kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency Expired - Fee Related CN105437010B (en)

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Application Number Priority Date Filing Date Title
CN201511014454.5A CN105437010B (en) 2015-12-31 2015-12-31 A kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency

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Application Number Priority Date Filing Date Title
CN201511014454.5A CN105437010B (en) 2015-12-31 2015-12-31 A kind of pre- postwelding inside weld polishing derusting mechanism of steel pipe high frequency

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CN105437010B true CN105437010B (en) 2017-09-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107900878B (en) * 2017-11-17 2019-11-26 洛阳德平科技股份有限公司 High efficient full automatic pipe end rust removalling equipment

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08243893A (en) * 1995-03-07 1996-09-24 Topy Ind Ltd Angular pipe welding bead part grinding device
JPH09277146A (en) * 1996-04-15 1997-10-28 Kyowa Stainless Kk Internal surface polishing machine
CN201565825U (en) * 2009-12-11 2010-09-01 河北华油钢管设计研究院有限公司 Inside weld grinding machine of straight welding pipes
CN102407469A (en) * 2011-11-07 2012-04-11 杨春 Special grinding machine for pipeline inner hole
CN202278462U (en) * 2011-10-08 2012-06-20 鑫源泰钢管集团有限公司 Welding seam grinding device in steel pipe
CN102513904A (en) * 2011-12-30 2012-06-27 大连三高集团有限公司 Inner weld seam grinding machine for straight weld seam pipes
CN104723193A (en) * 2015-03-13 2015-06-24 番禺珠江钢管有限公司 Welding pipe inside burr grinding device
CN205438081U (en) * 2015-12-31 2016-08-10 番禺珠江钢管(连云港)有限公司 Weld grinding rust removing mechanism in behind steel pipe high frequency prewelding

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08243893A (en) * 1995-03-07 1996-09-24 Topy Ind Ltd Angular pipe welding bead part grinding device
JPH09277146A (en) * 1996-04-15 1997-10-28 Kyowa Stainless Kk Internal surface polishing machine
CN201565825U (en) * 2009-12-11 2010-09-01 河北华油钢管设计研究院有限公司 Inside weld grinding machine of straight welding pipes
CN202278462U (en) * 2011-10-08 2012-06-20 鑫源泰钢管集团有限公司 Welding seam grinding device in steel pipe
CN102407469A (en) * 2011-11-07 2012-04-11 杨春 Special grinding machine for pipeline inner hole
CN102513904A (en) * 2011-12-30 2012-06-27 大连三高集团有限公司 Inner weld seam grinding machine for straight weld seam pipes
CN104723193A (en) * 2015-03-13 2015-06-24 番禺珠江钢管有限公司 Welding pipe inside burr grinding device
CN205438081U (en) * 2015-12-31 2016-08-10 番禺珠江钢管(连云港)有限公司 Weld grinding rust removing mechanism in behind steel pipe high frequency prewelding

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