CN108707861A - A kind of powder zincizing degreasing unit - Google Patents

A kind of powder zincizing degreasing unit Download PDF

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Publication number
CN108707861A
CN108707861A CN201810838243.0A CN201810838243A CN108707861A CN 108707861 A CN108707861 A CN 108707861A CN 201810838243 A CN201810838243 A CN 201810838243A CN 108707861 A CN108707861 A CN 108707861A
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CN
China
Prior art keywords
oil removing
steel wire
annulus
removing bucket
fixed ring
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.)
Pending
Application number
CN201810838243.0A
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Chinese (zh)
Inventor
刘新达
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.)
Tianjin Pengyuxingye Hardware Co Ltd
Original Assignee
Tianjin Pengyuxingye Hardware Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin Pengyuxingye Hardware Co Ltd filed Critical Tianjin Pengyuxingye Hardware Co Ltd
Priority to CN201810838243.0A priority Critical patent/CN108707861A/en
Publication of CN108707861A publication Critical patent/CN108707861A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/02Pretreatment of the material to be coated
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00Apparatus for cleaning or pickling metallic material

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning In General (AREA)

Abstract

The present invention provides a kind of powder zincizing degreasing units, including oil removing bucket, electromagnetism bung is covered at the top of oil removing bucket, circular steel wire is equipped in oil removing bucket, the diameter of steel wire is equal with the internal diameter of staving, the driving mechanism that driving steel wire moves up and down is provided with above oil removing bucket, the lower section of steel wire is equipped with support portion, support portion includes the fixed ring being arranged concentrically, first annulus, second annulus, second annulus is fixed on the edge of steel wire, fixed ring is fixed on the center of the lower surface of steel wire, first annulus is between the second annulus and fixed ring, several connecting rods are circumferentially evenly equipped between second annulus and fixed ring, fixed ring is fixed in driving mechanism.In oil removing, steel nail pumps the present invention in degreasing fluid, and oil removing is without dead angle, and oil removal efficiency is high, effect is good.

Description

A kind of powder zincizing degreasing unit
Technical field
The invention belongs to steel nail production equipment fields, more particularly, to a kind of powder zincizing degreasing unit.
Background technology
Powder zincizing is that in case of heating, gyrate zincizing case, and the part in zincizing case is made not stop with filler Ground collides and friction, piece surface are in activated state, zinc powder allowed to be adhered to piece surface.Since temperature raises, zinc start to Inside parts diffusion forms fe-zn alloy layer secured, smooth, fine and close, in homogeneous thickness in piece surface.Steel nail is carried out Powder zincizing can improve the wear-resisting property and Corrosion Protection of steel nail.
It needing to carry out the pretreatments such as oil removing, pickling to steel nail before powder zincizing, existing oil removing generally uses chemical method, Steel nail is put into the degreasing fluid for being immersed in and having configured in placement plate and is taken out after a period of time.When the oil removing of this method and placement plate Contact position be oil removing dead angle, degreasing fluid is not easy to infiltrate, and oil removing at this is caused to be not thorough, and then influences subsequently to carry out steel nail Powder zincizing quality.
Invention content
In view of this, the present invention is directed to propose a kind of powder zincizing degreasing unit, when use device oil removing, steel nail except It pumps in fluid, degreasing fluid can infiltrate steel nail and the oil removing dead angle of steel wire contact position, and then can be by steel Whole oil stains of the outer surface of nail clean up, and oil removing is without dead angle, and oil removal efficiency is high, effect is good.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way:
A kind of powder zincizing degreasing unit, including oil removing bucket, are covered with electromagnetism bung at the top of oil removing bucket, in oil removing bucket Equipped with circular steel wire, the diameter of steel wire is equal with the diameter of the inner cavity of oil removing bucket, and driving is provided with above oil removing bucket The driving mechanism that steel wire moves up and down, the lower section of steel wire are equipped with support portion, and support portion includes the fixed ring being arranged concentrically, the One annulus, the second annulus, fixed ring are fixed on the center of the lower surface of steel wire, and the second annulus is fixed on the edge of steel wire, First annulus is circumferentially evenly equipped with several connecting rods, steel wire between the second annulus and fixed ring between the second annulus and fixed ring The center of net offers circular hole, and fixed ring forms channel up and down with circular hole and fixed ring is fixed in driving mechanism.
Further, the mesh number of steel wire is 5~100 mesh.
Further, driving mechanism includes holder, and holder is in " n " font, and holder is equipped with the first cylinder, the first cylinder position In the surface of oil removing bucket, the center of electromagnetism bung be provided with the matched through-hole of the telescopic rod of the first cylinder, the first cylinder Telescopic rod is downward and the end of telescopic rod is stretched by through-hole in oil removing bucket, and fixed ring is fixed on the telescopic rod of the first cylinder End.
Further, the lower part of the inner cavity of oil removing bucket is equipped with bubbling pipe, and multiple sprays are uniformly provided on the tube wall of bubbling pipe Stomata, oil removing bucket are externally provided with pulse gas generator and air blower, and air blower, pulse gas generator and bubbling pipe pass through gas Pipeline is linked in sequence.
Further, the bottom of holder is equipped with the second cylinder that driving arm moves up and down, between electromagnetism bung and holder It is fixedly connected with cross bar, electromagnetism bung is fixed to by cross bar on holder.
Further, it is provided with observation window on the side wall of oil removing bucket.
Further, the surface spraying of steel wire has corrosion-resistant coating.
Compared with the existing technology, powder zincizing of the present invention is had the advantage that with degreasing unit:
(1) in oil removing, steel nail pumps powder zincizing degreasing unit of the present invention in degreasing fluid, Degreasing fluid can infiltrate steel nail and the oil removing dead angle of steel wire contact position, and then can be by whole oil stains of the outer surface of steel nail It cleans up, oil removing is without dead angle, and oil removal efficiency is high, effect is good;
(2) powder zincizing degreasing unit of the present invention passes through the bubbling pipe of setting, the generation of pulse gas generator Gas entered in the degreasing fluid in oil removing bucket by bubbling pipe, under the drive of air pulse, degreasing fluid generate disturbance, into One step, which enhances in oil removing bucket, removes speed oil and deoiling effect.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the overall structure diagram of the powder zincizing degreasing unit described in the embodiment of the present invention;
Fig. 2 is the structural schematic diagram of the support portion of the powder zincizing degreasing unit described in the embodiment of the present invention.
Reference sign:
1, oil removing bucket;11, oil inlet pipe;12, oil exit pipe;13, electromagnetism bung;131, cross bar;2, steel wire;3, driving machine Structure;31, holder;32, the first cylinder;4, support portion;41, fixed ring;42, the first annulus;43, the second annulus;44, connecting rod;5, Second cylinder;6, bubbling pipe;61, fumarole;62, pulse gas generator;63, air blower;7, observation window.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair The limitation of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple " It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can Can also be electrical connection to be mechanical connection;It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of powder zincizing degreasing unit, as shown in Figure 1, including oil removing bucket 1, the upper portion side wall of oil removing bucket 1 is provided with The lower sides of oil inlet pipe 11, oil removing bucket 1 are provided with oil exit pipe 12.The top of oil removing bucket 1 is covered with electromagnetism bung 13, oil removing bucket Circular steel wire 2 is equipped in 1, steel wire 2 is for placing steel nail.The mesh number of steel wire 2 is 5~100 mesh, prevents steel nail from steel In the gap for falling or being stuck in steel wire 2 in the gap of silk screen 2.The diameter phase of the diameter of steel wire 2 and the inner cavity of oil removing bucket 1 Top Deng, oil removing bucket 1 is provided with the driving mechanism 3 that driving steel wire 2 moves up and down.
Driving mechanism 3 includes holder 31, and holder 31 is in " n " font, and holder 31 is equipped with the first cylinder 32, the first cylinder 32 Positioned at the surface of oil removing bucket 1.The center of electromagnetism bung 13 is provided with the matched through-hole of telescopic rod with the first cylinder 32 (in figure It is not shown), the telescopic rod of the first cylinder 32 is downward and the end of telescopic rod is stretched by through-hole in oil removing bucket 1.When first When the telescopic rod of cylinder 32 is retracted to utmostly, electromagnetism bung 13, which is powered, generates magnetic attraction, and steel nail is acted on by magnetic attraction When, steel nail leaves steel wire 2 and moves upwards the bottom end for being adsorbed to electromagnetism bung 13.Then, electromagnetism bung 13 powers off, and steel nail exists Fallen from electromagnetism bung 13 under the action of its own gravity, such power on/off is multiple, steel nail steel wire 2 and electromagnetism bung 13 it Between degreasing fluid in pump, degreasing fluid can infiltrate steel nail and the oil removing dead angle of 2 contact position of steel wire, in turn Whole oil stains of the outer surface of steel nail can be cleaned up.
To prevent steel wire 2 from deforming, the lower section of steel wire 2 is equipped with support portion 4, as shown in Fig. 2, support portion 4 includes concentric The fixed ring 41 of setting, the first annulus 42, the second annulus 43.Fixed ring 41 is fixed on the center of the lower surface of steel wire 2, and second Annulus 43 is fixed on the edge of steel wire 2, and the first annulus 42 is between the second annulus 43 and fixed ring 41.In steel wire 2 The heart offers circular hole (not shown), and fixed ring 41 forms channel up and down with circular hole and fixed ring 41 is fixed on first The end of the telescopic rod of cylinder 32 is circumferentially evenly equipped with several connecting rods 44 between second annulus 43 and fixed ring 41.
As shown in Figure 1, the bottom of holder 31 be equipped with driving arm 31 move up and down the second cylinder 5, electromagnetism bung 13 with Cross bar 131 is fixedly connected between holder 31, electromagnetism bung 13 is fixed to by cross bar 131 on holder 31.It is put when by steel nail When setting on steel wire 2, the second cylinder 5, the telescopic rod elongation of the second cylinder 5, holder 31, electromagnetism bung 13, steel wire 2 are driven It is moved upwards up to the top of oil storage barrel, facilitates worker that steel nail is placed on steel wire 2.
Speed oil and deoiling effect are removed to further enhance in oil removing bucket 1, the lower part of the inner cavity of oil removing bucket 1, which is equipped with, to be bubbled Pipe 6.Multiple fumaroles 61 are uniformly provided on the tube wall of bubbling pipe 6, oil removing bucket 1 is externally provided with pulse gas generator 62 and air blast Machine 63, air blower 63, pulse gas generator 62 and bubbling pipe 6 are linked in sequence by gas pipeline.When opening air blower 63, drum What wind turbine 63 generated divides into pulse gas generator 62.The gas that pulse gas generator 62 generates is entered by bubbling pipe 6 Into the degreasing fluid in oil removing bucket 1, under the drive of air pulse, degreasing fluid generates disturbance, enhances the oil removing speed in oil removing bucket 1 Degree and deoiling effect.
In addition, being provided with observation window 7 on the side wall of oil removing bucket 1.The surface spraying of steel wire 2 has corrosion-resistant coating, prevents steel Silk screen 2 is corroded, and extends the service life of steel wire 2.
The use process of the present invention:
Before oil removing, the second cylinder 5, the telescopic rod elongation of the second cylinder 5, holder 31, electromagnetism bung 13, steel wire 2 are opened It is moved upwards up to the top of oil storage barrel, steel nail is placed on steel wire 2 by worker, and then, the telescopic rod of the second cylinder 5 is retracted, Holder 31, electromagnetism bung 13,2 homing of steel wire close the second cylinder 5, start oil removing.
When oil removing, the first cylinder 32 and air blower 63, the telescopic rod constantly elongation and contraction of the first cylinder 32 are opened.When When the telescopic rod of one cylinder 32 is retracted to utmostly, electromagnetism bung 13, which is powered, generates magnetic attraction, and steel nail is made by magnetic attraction Used time, steel nail leave steel wire 2 and move upwards the bottom end for being adsorbed to electromagnetism bung 13.Then, electromagnetism bung 13 powers off, steel nail It falls under the effect of gravity, such power on/off is multiple, in degreasing fluid of the steel nail between steel wire 2 and electromagnetism bung 13 It pumps, degreasing fluid can infiltrate steel nail and the oil removing dead angle of 2 contact position of steel wire, and then can be by the outer of steel nail Whole oil stains on surface clean up.After oil removing, the first cylinder 32 and air blower 63 are closed.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.

Claims (7)

1. a kind of powder zincizing degreasing unit, it is characterised in that:Including oil removing bucket (1), oil removing bucket is covered with electricity at the top of (1) Magnetic bung (13), oil removing bucket (1) is interior to be equipped with circular steel wire (2), the diameter of steel wire (2) and the inner cavity of oil removing bucket (1) Diameter is equal, and the driving mechanism (3) that driving steel wire (2) moves up and down is provided with above oil removing bucket (1), steel wire (2) Lower section is equipped with support portion (4), and support portion (4) includes the fixed ring (41) being arranged concentrically, the first annulus (42), the second annulus (43), fixed ring (41) is fixed on the center of the lower surface of steel wire (2), and the second annulus (43) is fixed on the side of steel wire (2) Edge, the first annulus (42) is between the second annulus (43) and fixed ring (41), between the second annulus (43) and fixed ring (41) Several connecting rods (44) are circumferentially evenly equipped with, the center of steel wire (2) offers circular hole, and fixed ring (41) is formed up and down with circular hole Channel and fixed ring (41) be fixed to driving mechanism (3) on.
2. powder zincizing degreasing unit according to claim 1, it is characterised in that:The mesh number of steel wire (2) be 5~ 100 mesh.
3. powder zincizing degreasing unit according to claim 1, it is characterised in that:Driving mechanism (3) includes holder (31), holder (31) is in " n " font, and holder (31) is equipped with the first cylinder (32), and the first cylinder (32) is located at oil removing bucket (1) Surface, the center of electromagnetism bung (13) are provided with the matched through-hole of telescopic rod with the first cylinder (32), the first cylinder (32) Telescopic rod downward and the end of telescopic rod is stretched by through-hole in oil removing bucket (1), fixed ring (41) is fixed on the first gas The end of the telescopic rod of cylinder (32).
4. powder zincizing degreasing unit according to claim 1, it is characterised in that:The lower part of the inner cavity of oil removing bucket (1) Equipped with bubbling pipe (6), multiple fumaroles (61) are uniformly provided on the tube wall of bubbling pipe (6), oil removing bucket (1) is externally provided with pulse air Body generator (62) and air blower (63), air blower (63), pulse gas generator (62) and bubbling pipe (6) pass through gas pipeline It is linked in sequence.
5. powder zincizing degreasing unit according to claim 3, it is characterised in that:The bottom of holder (31) is equipped with driving The second cylinder (5) that holder (31) moves up and down, is fixedly connected with cross bar (131) between electromagnetism bung (13) and holder (31), Electromagnetism bung (13) is fixed to by cross bar (131) on holder (31).
6. powder zincizing degreasing unit according to claim 5, it is characterised in that:It is arranged on the side wall of oil removing bucket (1) There is observation window (7).
7. powder zincizing degreasing unit according to claim 1, it is characterised in that:The surface spraying of steel wire (2) has Corrosion-resistant coating.
CN201810838243.0A 2018-07-26 2018-07-26 A kind of powder zincizing degreasing unit Pending CN108707861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810838243.0A CN108707861A (en) 2018-07-26 2018-07-26 A kind of powder zincizing degreasing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810838243.0A CN108707861A (en) 2018-07-26 2018-07-26 A kind of powder zincizing degreasing unit

Publications (1)

Publication Number Publication Date
CN108707861A true CN108707861A (en) 2018-10-26

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CN201810838243.0A Pending CN108707861A (en) 2018-07-26 2018-07-26 A kind of powder zincizing degreasing unit

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109208018A (en) * 2018-11-06 2019-01-15 刘昊 A kind of copper and copper alloy shape tube acid cleaning process

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CN88200247U (en) * 1988-01-18 1988-11-09 赵书敏 Quick cleaning equipment for magnet
KR20010065419A (en) * 1999-12-29 2001-07-11 이구택 Device of Cleaning Mixing Acid Tank
JP2005218943A (en) * 2004-02-04 2005-08-18 Sutai:Kk Washing apparatus
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CN103352232A (en) * 2013-06-17 2013-10-16 安徽长青电子机械(集团)有限公司 Air blowing type metal piece soaking degreasing equipment
KR101407620B1 (en) * 2013-01-24 2014-06-16 동서대학교산학협력단 Cleaning device having a cylinder driven by a reciprocating type washing plate
CN104550116A (en) * 2015-01-19 2015-04-29 张家港市科宇信超声有限公司 Multi-arm oscillating ultrasonic cleaner
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CN106835176A (en) * 2017-04-14 2017-06-13 石宏杰 A kind of hardware galvanized pipe lift pickler
CN206450022U (en) * 2016-10-21 2017-08-29 天津鹏宇兴业五金制品有限公司 A kind of fast-drying device of steel nail
CN206925051U (en) * 2017-07-12 2018-01-26 浙江盛世嘉实业有限公司 A kind of on-line cleaning device of screw
CN108212919A (en) * 2018-01-09 2018-06-29 海宁迪万沃浦建材科技有限公司 A kind of cleaning machine
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CN88200247U (en) * 1988-01-18 1988-11-09 赵书敏 Quick cleaning equipment for magnet
KR20010065419A (en) * 1999-12-29 2001-07-11 이구택 Device of Cleaning Mixing Acid Tank
JP2005218943A (en) * 2004-02-04 2005-08-18 Sutai:Kk Washing apparatus
KR20060060085A (en) * 2004-11-30 2006-06-05 한밭대학교 산학협력단 Washing device
CN2903806Y (en) * 2006-04-07 2007-05-23 鲁亮 Magnet switch solar water heater
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CN103352232A (en) * 2013-06-17 2013-10-16 安徽长青电子机械(集团)有限公司 Air blowing type metal piece soaking degreasing equipment
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CN206450022U (en) * 2016-10-21 2017-08-29 天津鹏宇兴业五金制品有限公司 A kind of fast-drying device of steel nail
CN106835176A (en) * 2017-04-14 2017-06-13 石宏杰 A kind of hardware galvanized pipe lift pickler
CN206925051U (en) * 2017-07-12 2018-01-26 浙江盛世嘉实业有限公司 A kind of on-line cleaning device of screw
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CN208791728U (en) * 2018-07-26 2019-04-26 天津鹏宇兴业五金制品有限公司 A kind of powder zincizing degreasing unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109208018A (en) * 2018-11-06 2019-01-15 刘昊 A kind of copper and copper alloy shape tube acid cleaning process
CN109208018B (en) * 2018-11-06 2020-10-30 淮北微立淘科技有限公司 Pickling process of copper and copper alloy special pipe

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