CN105382025A - Excessive-opening-prevention type copper pipe rolling mill - Google Patents

Excessive-opening-prevention type copper pipe rolling mill Download PDF

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Publication number
CN105382025A
CN105382025A CN201510760908.7A CN201510760908A CN105382025A CN 105382025 A CN105382025 A CN 105382025A CN 201510760908 A CN201510760908 A CN 201510760908A CN 105382025 A CN105382025 A CN 105382025A
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CN
China
Prior art keywords
ring
copper pipe
cover plate
type copper
ratchet
Prior art date
Application number
CN201510760908.7A
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Chinese (zh)
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CN105382025B (en
Inventor
杨鑫
何海军
翟建民
陈宗华
孙冀阳
张斌海
刘娜
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新兴铸管(浙江)铜业有限公司
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Priority to CN201510760908.7A priority Critical patent/CN105382025B/en
Publication of CN105382025A publication Critical patent/CN105382025A/en
Application granted granted Critical
Publication of CN105382025B publication Critical patent/CN105382025B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B31/00Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames

Abstract

The invention relates to rolling mills, in particular to an excessive-opening-prevention type copper pipe rolling mill. The excessive-opening-prevention type copper pipe rolling mill comprises a rolling mill body, a cover plate hinged to the rolling mill body and a hydraulic cylinder for driving the cover plate to be opened and closed, and is characterized by further comprising a limiting structure for limiting the opening degree of the cover plate. The limiting structure comprises a limiting switch and a control device. When the limiting switch detects that the cover plate is opened by 85 degrees, the control device stops the hydraulic cylinder, and the cover plate cannot continue to be opened. According to the excessive-opening-prevention type copper pipe rolling mill, excessive opening of the cover plate cannot be generated, and the problem that an existing rolling mill will generate the phenomenon that the opening angle is larger than 90 degrees, and consequently, the hydraulic cylinder cannot close the cover plate can be solved.

Description

Anti-excessive open type copper pipe rolling

Technical field

The present invention relates to milling train, particularly relate to a kind of anti-excessive open type copper pipe rolling.

Background technology

Need to use milling train in the manufacturing process of copper bar.Chinese Patent Application No. be 200820014774X, publication number is CN201239741Y, name is called in the patent document of " lift working roll mixes roller " and discloses a kind of existing milling train.Existing milling train comprises rolling mill body, be articulated with the cover plate on rolling mill body and drive the hydraulic cylinder of cover plate opening-closing.Existing milling train has the following disadvantages: the weight of milling train cover plate own is very heavy, the phenomenon that lid aperture is greater than 90 degree can be produced, the aperture of lid be greater than 90 ° then hydraulic cylinder cover plate can not be shut, at this moment need operating personnel to go process that lid just can be made for a long time to recover; Isolating affection is poor; Cover plate do not have handle, inconvenience during manual operation cover plate.

Summary of the invention

The invention provides a kind of cover plate and can not produce the anti-excessive open type copper pipe rolling that transition opens, solve existing milling train and can produce opening angle and be greater than the phenomenon of 90 ° and problem that cover plate can not be shut by the hydraulic cylinder that causes.

Above technical problem is solved by following technical proposal: a kind of anti-excessive open type copper pipe rolling, comprise rolling mill body, be articulated with cover plate on rolling mill body and drive the hydraulic cylinder of cover plate opening-closing, it is characterized in that, also comprise the position limiting structure of the aperture limiting described cover plate, described position limiting structure comprises limit switch and control device, described control device described limit switch detect described cover plate stop described hydraulic cylinder when being opened to 85 ° and make described cover plate can not continue open.Cover plate can be made to be merely able to unlatching 85 °, and namely the aperture of cover plate is 85 °, produces, thus can not produce the situation that cover plate can not close up by hydraulic cylinder so the open cap period of the day from 11 p.m. to 1 a.m can not produce the phenomenon that cover plate opens more than 90 °.

As preferably, described rolling mill body is provided with feet, described feet comprises the hypomere that epimere and upper end are set in epimere lower end, the shock-absorbing spring supporting described epimere is provided with in hypomere, the upper end of described epimere is provided with connecting ring, inner ring is equipped with in described connecting ring, described inner ring is linked together with described connecting ring by rubber ring, described rubber ring is provided with several blind holes distributed along rubber ring circumference, described blind hole is arranged at inner peripheral surface or the outer peripheral face of described rubber ring, division board is provided with in described blind hole, described blind hole is divided into radially-arranged two cavitys along rubber ring by described division board, described division board is provided with the main friction passage being communicated with described two cavitys, friction plate is provided with in described main friction passage, described friction plate is equipped with the friction lever that can radially slide along rubber ring, described friction lever is provided with a friction passage, the elastomeric cap arched upward towards blind hole inside is stamped in the openend of described blind hole, described inner ring is equipped with connecting pin, described epimere is linked together with described rolling mill body body by described connecting pin.The vibration isolating effect of milling train can be improved.The shock insulation process of the technical program is: by liquid filling in blind hole, when producing vibration, reciprocal radial displacement can be produced between inner ring and connecting ring, when this displacement can cause blind hole to be out of shape, blind hole distortion and drive that position liquid in the inner flows back and forth between inner chamber body and outer chamber, the rocking of friction plate and friction lever, liquid flow and friction plate and friction lever rock and change vibrational energy into heat energy in process and consume.If vibrate less and be not enough to impel blind hole to be out of shape time, now only have rocking of liquid, during liquid sloshing, friction lever produces and rocks and energy-absorbing, friction lever is set and can improves the absorption that frequency low-amplitude is vibrated, make the present invention not only can absorb the vibrational energy of isolation high amplitude, can also absorb the vibrational energy of short arc, therefore isolating affection is better.When this structure can make the blind hole of side be squeezed, the blind hole of opposite side then produces diastole instead of simultaneously pressurized or diastole, and making when the positive and negative amplitude vibrated is interval can both effectively absorbing, and absorbing efficiency is high.This structure is also because inner ring is connected by rubber ring with connecting ring, and connecting ring is not easy to produce distortion, and distortion fecund is born in inner ring, so only need after distortion to change inner ring.

As preferably, described friction plate is all stretched out at the two ends of described friction lever, and two end faces of described friction lever are all sphere.Energy-absorbing isolating affection is good.

As preferably, described friction lever is cylindrical, two end faces of described friction lever is all provided with some grooves along the distribution of friction lever circumference.The contact area of energy-absorbing bar with liquid can be improved, to improve energy-absorbing effect and induction sensitivity.

As preferably, described feet also comprises driving mechanism, described inner ring is connected to described connecting ring rotationally, described driving mechanism is used for the one-directional rotation point resultant motion between epimere and hypomere being converted to inner ring, described driving mechanism comprises the ratchet of ratchet and driving pawl, and described ratchet coaxially links together with described inner ring; Described ratchet links together with hypomere.When being subject to vibrating, inner ring can one-directional rotation, thus avoids inner ring to be impacted at a position for a long time, thus can effectively avoid interior annular strain, and inner ring is indeformable, once connecting ring produces distortion, inner ring can also play the effect of repairing connecting ring.Thus effectively overcome the problem that connecting ring easily produces distortion.

As preferably, described ratchet is fixed in drive rod, and described ratchet is connected with described hypomere by described drive rod, and described drive rod is connected with and drives described ratchet to be brought together into engage spring on described ratchet.Reliability of Microprocessor is good.

As preferably, described epimere is provided with slide opening, and described drive rod can two dimension be slidably connected in described slide opening.Ratchet can be further easily made to carry out folding with ratchet, good reliability during one-directional rotation.

As preferably, described drive rod is provided with deposits hole, deposits in hole described in one end of described engage spring is located in.Reliability and convenience when being connected can be improved.

As preferably, described cover plate is provided with handle, described handle comprises handle rod, the outer resilient sleeve of described handle rod is provided with overcoat, the elastic adjusting mechanism of the elastic force regulated between overcoat and handle rod is provided with between described handle rod and overcoat, described elastic adjusting mechanism comprises and is set in handle rod outer and the base tube be located in overcoat and the holding sheet being looped around described base tube outside, the fricting strip that described holding sheet is distributed by the some pieces of circumferences along base tube is formed, described fricting strip is provided with the slide bar that some radial directions along base tube extend, described sliding bar is arranged in described base tube, the inner of described slide bar is provided with and drives the outer shift-in of slide bar and drive fricting strip to be connected to the 3rd spring together with overcoat, described elastic adjusting mechanism is also provided with the pretightning force adjustment structure of the pretightning force regulating described 3rd spring.Realize the switch of cover plate by gripping handle rod during use.This structure of handle rod can make handle rod in use procedure have elasticity, thus improves comfortableness when using, and the elastic effect in the technical program can also change, to adapt to different needs.Concrete adjustment process is, the 3rd spring moving radially along base tube is driven by pretightning force adjustment structure, thus fricting strip is changed with the normal pressure of overcoat, thus realize the change of pretightning force, the thing change of the power that overcoat is rocked relative to handle rod carrys out the different elastic effect in main road.

As preferably, described pretightning force adjustment structure comprises the conical head that base tube is supported on the tubular structure outside handle rod by two, drive conical head move axially and can make conical head stop at desired location drives structure and some push rods, described two conical heads are slidably connected in the two ends of described base tube in the mode that miner diameter end subtend is arranged, the two ends of described push rod are shelved on the conical surface of described two conical heads, all described slide bars of same fricting strip pass through described spring supporting on same described push rod, the described slide bar of each block fricting strip is respectively supported by a described push rod.During adjustment, realize push rod moving radially thus realizing the change of push rod along base tube radial position along base tube by the position axially changing conical head, thus realize the change of the 3rd initial tension of spring.Convenience during adjustment is good.

As preferably, describedly drive the jacking block tied and enough comprise in two two ends being threaded in described base tube, described two conical heads are between described two jacking blocks.Drive conical head to realize regulating by rotating jacking block, regulate and put in place, automatically locate, convenience during use is better.

The present invention has following advantage: can prevent the cover plate of milling train from excessively opening.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the embodiment of the present invention one.

Fig. 2 be connecting ring in Fig. 1 analyse and observe enlarged diagram.

Fig. 3 is the close-up schematic view at the C place of Fig. 2.

Fig. 4 is the close-up schematic view at the D place of Fig. 3.

Fig. 5 is the close-up schematic view at the B place of Fig. 4.

Fig. 6 is A-A cross-sectional schematic of the handle rod in Fig. 1.

Fig. 7 is E-E cross-sectional schematic of the handle rod of Fig. 1.

Fig. 8 is the close-up schematic view of the feet in the embodiment of the present invention three.

In figure: rolling mill body 1, cover plate 11, hydraulic cylinder 12, position limiting structure 2, limit switch 21, control device 22, handle 5, handle rod 51, overcoat 52, driving mechanism 6, ratchet 61, ratchet 62, drive rod 63, deposit hole 64, engage spring 65, rubber ring 7, blind hole 71, inner chamber body 711, outer chamber 712, division board 72, elastomeric cap 73, main friction passage 75, friction plate 76, friction lever 77, axial end 771, groove 772, prop up friction passage 78, elastic adjusting mechanism 8, base tube 81, holding sheet 82, fricting strip 821, slide bar 822, 3rd spring 823, pretightning force adjustment structure 83, conical head 831, push rod 832, drives structure 833, jacking block 8331, feet 9, hypomere 91, epimere 92, connecting ring 921, inner ring 922, connecting pin 923, slide opening 924, shock-absorbing spring 93.

Detailed description of the invention

Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.

Embodiment one, see Fig. 1, a kind of anti-excessive open type copper pipe rolling, comprises rolling mill body 1 and position limiting structure 2.Rolling mill body 1 is hinged with cover plate 11 and hydraulic cylinder 12.Hydraulic cylinder 12 is for driving and driving cover plate 11 folding.Position limiting structure 2 comprises limit switch 21 and control device 22.Limit switch 21 to be arranged on when cover plate is opened to 85 ° can touched to and produce the position of action.During use, limit switch 21 is touched when hydraulic cylinder 12 drives cover plate 11 to be opened to 85 °, limit switch produces action and carries signal to control device 22, and control device 22 makes hydraulic cylinder 12 stop operation and remains on current state, thus plays the effect preventing from opening.

Rolling mill body 1 is also provided with feet 9.Feet 9 comprises hypomere 91 and epimere 92.The upper end of hypomere 91 is set on the lower end of epimere 92 slidably.The shock-absorbing spring 93 supporting epimere 92 is provided with in hypomere 81.The upper end of epimere 92 is provided with connecting ring 921.Inner ring 922 is equipped with in connecting ring 921.Inner ring 922 is linked together with connecting ring 921 by rubber ring 7.Inner ring 922 is equipped with connecting pin 923.Connecting pin 923 links together with rolling mill body 1.

Cover plate 11 is provided with handle 5.Handle 5 comprises handle rod 51.Draw ring 53 is formed between handle rod 51 and cover plate 11.The outer resilient sleeve of handle rod 51 is provided with overcoat 52.

See Fig. 2, the inner peripheral surface of rubber ring 7 is provided with the blind hole 71 (outer peripheral face that blind hole is arranged on rubber ring is also fine) that several circumferences along rubber ring distribute.Division board 72 is provided with in blind hole 71.Blind hole 71 is divided into two cavitys and inner chamber body 711 and outer chamber 712 by division board 72.The flexible lid 73 of open end cap of blind hole 71.Elastomeric cap 73 is the bowl-type arched upward towards blind hole 71 inside.

See Fig. 3, division board 72 is provided with some main friction passage 75.Main friction passage 75 communication with cavity body 711 and outer chamber 712.Friction plate 76 is provided with in main friction passage 75.

See Fig. 4, in friction plate 76, be equipped with some friction levers 77 that can slide along above-below direction in the distribution arrangement of inner chamber body and outer chamber and figure.Friction lever 77 is cylindrical.Friction lever 77 is provided with a friction passage 78.Prop up the space (in being namely communicated with outer chamber) that friction passage 78 is communicated with friction plate 76 upper and lower.Two axial ends 771 of friction lever 77 are all sphere.

See Fig. 5, two axial ends 771 of friction lever 77 are all provided with some grooves 772.Groove 772 is along the distribution of friction lever 77 circumference.

See Fig. 6, between handle rod 51 and overcoat 52, be provided with elastic adjusting mechanism 8.Elastic adjusting mechanism 8 comprises base tube 81, holding sheet 82 and pretightning force adjustment structure 83.Base tube 81 is set in outside handle rod 51.Base tube 81 is located in overcoat 52.Holding sheet 82 is made up of some pieces of fricting strips 821.Fricting strip 821 distributes along the circumference of base tube 81.Fricting strip 821 is provided with the slide bar 822 that some radial directions along base tube extend axial distribution.Slide bar 822 slides and is arranged in base tube 81.The inner of slide bar 822 is provided with the 3rd spring 823.3rd spring 823 drives fricting strip to be connected to together with overcoat 52 by slide bar.The pretightning force adjustment structure 83 of moving outward comprises two conical heads 831 and some push rods 832.Conical head 831 is tubular structure.Conical head 831 to be set on handle rod 51 and to be located in base tube 81 and linked together with handle rod 51 by base tube 81.Conical head 831 is only connected in base tube 81 slidably.Push rod 832 axially extends along the circumference distribution of base tube 81.All slide bars 822 of same fricting strip 821 are supported on same push rod 832 by the 3rd spring 823, and the slide bar of each block fricting strip is respectively supported by a push rod.

See Fig. 7, the mode that two conical heads 831 are arranged with miner diameter end subtend is slidably connected in the two ends of base tube 81.The two ends of push rod 832 are shelved on the conical surface of two conical heads 831.Pretightning force adjustment structure 83 also comprises drives structure 833.。Driving knot enough 833 comprises the jacking block 8331 in two two ends being threaded in base tube 81.Jacking block 8331 is set on handle rod 51.Two conical heads 831 are between two jacking blocks 8331.

During use, drive conical head 831 to move along the axis of base tube 81 by rotating jacking block 8331, conical head 831 drives push rod 832 moving radially along base tube 81, and push rod 832 extrudes the 3rd spring 823 and changes pretightning force.

The present invention to the process that absorbing is carried out in the vibration produced is:

See Fig. 2 to Fig. 5, in inner chamber body 711 and outer chamber 712 all filled with fluid (can certainly make of the present invention time filling liquid), when panel and horizontal fixed plate produce vibration and are expressed to rubber ring 7 and cause blind hole 71 to be out of shape, make that liquid flows back and forth between inner chamber body 711 and outer chamber 712, friction plate 76 and friction lever 77(be see Fig. 5) produce and rock, liquid flow and friction plate and friction lever rock and change vibrational energy into heat energy in process and consume.If vibrate less and be not enough to impel blind hole to be out of shape time, now only have rocking of liquid, during liquid sloshing friction lever produce rock and energy-absorbing.

Embodiment two, the difference with embodiment one is:

See Fig. 8, feet 9 is also provided with driving mechanism 6.Inner ring 922 is connected in rubber ring 7 rotationally, and rubber ring 7 is fixed together with connecting ring 921.

Driving mechanism 6 comprises ratchet 61, the ratchet 62 of driving pawl and drive rod 63.Ratchet 61 coaxially links together with inner ring 922.Ratchet 61 is structure as a whole with inner ring 922.Ratchet 62 is fixed in one end of drive rod 63.Epimere 92 is provided with slide opening 924.The other end of drive rod 63 can be located in slide opening 924 in two dimension slip.The radial direction of the lower end edge connecting ring 921 of drive rod 63 slidably clasp joint in hypomere 91(see Fig. 1) be fixed together.Drive rod 63 is provided with deposits hole 64.Deposit hole 64 and have two.Deposit in hole 64 and be equipped with engage spring 65.Engage spring 65 is extension spring.One end of engage spring 65 links together with drive rod 63, and the other end links together with epimere 92.When engage spring 65 is in free state, under the effect of engage spring 65 spring, ratchet 62 can be engaged in ratchet 61.

During use, when being caused feet 9 to produce contractile motion when vibrating, drive rod 63 is towards connecting ring 921 translation (being namely moved upward in figure), now ratchet 62 can rotate clockwise by driving pawl 61, ratchet 61 drives inner ring 922 to rotate clockwise, when feet extends, drive rod 63 moves down, now ratchet 62 can not to rotate and when ratchet 62 touches the tooth on ratchet 61 by driving pawl 61, drive rod 63 makes drive rod 63 to reset away from ratchet 61, when ratchet 62 does not touch the tooth on ratchet 61, under the effect of engage spring 65, ratchet 62 moves to right and resets.Thus when making each vibration period, the impact site suffered by inner ring 922 is different, and inner ring 922 is circumferentially shifted one's position continuously and withstands shocks thus be not easy produce distortion and become oval.

Claims (10)

1. an anti-excessive open type copper pipe rolling, comprise rolling mill body, be articulated with cover plate on rolling mill body and drive the hydraulic cylinder of cover plate opening-closing, it is characterized in that, also comprise the position limiting structure of the aperture limiting described cover plate, described position limiting structure comprises limit switch and control device, described control device described limit switch detect described cover plate stop described hydraulic cylinder when being opened to 85 ° and make described cover plate can not continue open.
2. anti-excessive open type copper pipe rolling according to claim 1, it is characterized in that, described rolling mill body is provided with feet, described feet comprises the hypomere that epimere and upper end are set in epimere lower end, the shock-absorbing spring supporting described epimere is provided with in hypomere, the upper end of described epimere is provided with connecting ring, inner ring is equipped with in described connecting ring, described inner ring is linked together with described connecting ring by rubber ring, described rubber ring is provided with several blind holes distributed along rubber ring circumference, described blind hole is arranged at inner peripheral surface or the outer peripheral face of described rubber ring, division board is provided with in described blind hole, described blind hole is divided into radially-arranged two cavitys along rubber ring by described division board, described division board is provided with the main friction passage being communicated with described two cavitys, friction plate is provided with in described main friction passage, described friction plate is equipped with the friction lever that can radially slide along rubber ring, described friction lever is provided with a friction passage, the elastomeric cap arched upward towards blind hole inside is stamped in the openend of described blind hole, described inner ring is equipped with connecting pin, described epimere is linked together with described rolling mill body body by described connecting pin.
3. anti-excessive open type copper pipe rolling according to claim 2, it is characterized in that, described friction plate is all stretched out at the two ends of described friction lever, and two end faces of described friction lever are all sphere.
4. the anti-excessive open type copper pipe rolling according to Claims 2 or 3, it is characterized in that, described feet also comprises driving mechanism, described inner ring is connected to described connecting ring rotationally, described driving mechanism is used for the one-directional rotation point resultant motion between epimere and hypomere being converted to inner ring, described driving mechanism comprises the ratchet of ratchet and driving pawl, and described ratchet coaxially links together with described inner ring; Described ratchet links together with hypomere.
5. anti-excessive open type copper pipe rolling according to claim 4, it is characterized in that, described ratchet is fixed in drive rod, and described ratchet is connected with described hypomere by described drive rod, and described drive rod is connected with and drives described ratchet to be brought together into engage spring on described ratchet.
6. anti-excessive open type copper pipe rolling according to claim 5, it is characterized in that, described epimere is provided with slide opening, and described drive rod can two dimension be slidably connected in described slide opening.
7. anti-excessive open type copper pipe rolling according to claim 5, it is characterized in that, described drive rod is provided with deposits hole, deposits in hole described in one end of described engage spring is located in.
8. want the anti-excessive open type copper pipe rolling described in 1 or 2 or 3 according to right, it is characterized in that, described cover plate is provided with handle, described handle comprises handle rod, the outer resilient sleeve of described handle rod is provided with overcoat, the elastic adjusting mechanism of the elastic force regulated between overcoat and handle rod is provided with between described handle rod and overcoat, described elastic adjusting mechanism comprises and is set in handle rod outer and the base tube be located in overcoat and the holding sheet being looped around described base tube outside, the fricting strip that described holding sheet is distributed by the some pieces of circumferences along base tube is formed, described fricting strip is provided with the slide bar that some radial directions along base tube extend, described sliding bar is arranged in described base tube, the inner of described slide bar is provided with and drives the outer shift-in of slide bar and drive fricting strip to be connected to the 3rd spring together with overcoat, described elastic adjusting mechanism is also provided with the pretightning force adjustment structure of the pretightning force regulating described 3rd spring.
9. anti-excessive open type copper pipe rolling according to claim 8, it is characterized in that, described pretightning force adjustment structure comprises the conical head that base tube is supported on the tubular structure outside handle rod by two, drive conical head move axially and can make conical head stop at desired location drives structure and some push rods, described two conical heads are slidably connected in the two ends of described base tube in the mode that miner diameter end subtend is arranged, the two ends of described push rod are shelved on the conical surface of described two conical heads, all described slide bars of same fricting strip pass through described spring supporting on same described push rod, the described slide bar of each block fricting strip is respectively supported by a described push rod.
10. anti-excessive open type copper pipe rolling according to claim 9, is characterized in that, the described jacking block driving knot enough to comprise in two two ends being threaded in described base tube, described two conical heads are between described two jacking blocks.
CN201510760908.7A 2015-11-10 2015-11-10 Prevent excessive open type copper pipe rolling CN105382025B (en)

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CN201510760908.7A CN105382025B (en) 2015-11-10 2015-11-10 Prevent excessive open type copper pipe rolling

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Application Number Priority Date Filing Date Title
CN201510760908.7A CN105382025B (en) 2015-11-10 2015-11-10 Prevent excessive open type copper pipe rolling

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CN105382025B CN105382025B (en) 2018-02-06

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11300406A (en) * 1998-04-22 1999-11-02 Nippon Steel Corp Hydraulic equipment for driving hydraulic rolling-down cylinder of stand changing type rolling mill
US20020190068A1 (en) * 2001-01-09 2002-12-19 Sisk David E. Remotely operated manhole cover for a tanker
CN101049607A (en) * 2007-05-11 2007-10-10 鞍山亨通冶金矿山设备制造有限公司 Machine for reassembling bearing seat of supporting roller with positioning function, rotational carrying roller, and servo actuated cover board
CN201239741Y (en) * 2008-08-13 2009-05-20 中国第一重型机械集团公司 Elevation type work roll changing machine
CN202262154U (en) * 2011-09-29 2012-05-30 迈普通信技术股份有限公司 Flip type head of communication cabinet
CN203196998U (en) * 2013-02-28 2013-09-18 郑美璇 Rolling box with safety device
CN203637564U (en) * 2013-12-19 2014-06-11 东风汽车公司 Oil filler cap structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11300406A (en) * 1998-04-22 1999-11-02 Nippon Steel Corp Hydraulic equipment for driving hydraulic rolling-down cylinder of stand changing type rolling mill
US20020190068A1 (en) * 2001-01-09 2002-12-19 Sisk David E. Remotely operated manhole cover for a tanker
CN101049607A (en) * 2007-05-11 2007-10-10 鞍山亨通冶金矿山设备制造有限公司 Machine for reassembling bearing seat of supporting roller with positioning function, rotational carrying roller, and servo actuated cover board
CN201239741Y (en) * 2008-08-13 2009-05-20 中国第一重型机械集团公司 Elevation type work roll changing machine
CN202262154U (en) * 2011-09-29 2012-05-30 迈普通信技术股份有限公司 Flip type head of communication cabinet
CN203196998U (en) * 2013-02-28 2013-09-18 郑美璇 Rolling box with safety device
CN203637564U (en) * 2013-12-19 2014-06-11 东风汽车公司 Oil filler cap structure

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