CN109333300A - It is a kind of for removing the device of steel tube surface iron rust - Google Patents
It is a kind of for removing the device of steel tube surface iron rust Download PDFInfo
- Publication number
- CN109333300A CN109333300A CN201811364747.XA CN201811364747A CN109333300A CN 109333300 A CN109333300 A CN 109333300A CN 201811364747 A CN201811364747 A CN 201811364747A CN 109333300 A CN109333300 A CN 109333300A
- Authority
- CN
- China
- Prior art keywords
- polishing
- axis
- fixed
- iron rust
- steel tube
- 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.)
- Withdrawn
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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
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
-
- 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
- B24B55/06—Dust extraction equipment on grinding or polishing machines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
It is a kind of for removing the device of steel tube surface iron rust, including a polishing axis for driving it to rotate by power mechanism, the polishing portion being successively set on polishing axis and portion of gathering dust, polishing portion includes a Sand paper for polishing and setting on polishing axis and centre has spaced left fixed disk and right fixed disk, and the two sides of Sand paper for polishing are wrapped on respectively in two fixed disks, to form polishing region between two fixed disks.The portion of gathering dust includes a closing shell being arranged on polishing axis by bearing, and the drawing fan being fixed on polishing axis is provided in closing shell.The present invention can effectively avoid grinding wheel during the grinding process, since operation does not pay attention to the abrasion caused by steel tube surface, and the dust and iron rust that polishing generates can be drawn into closing shell, reduce the dust generated when polishing derusting and iron rust pollution, while also taking full advantage of the power that polishing axis rotation generates.
Description
Technical field
The present invention relates to the maintenance of steel pipe in daily life and maintenance areas, specifically a kind of for removing steel pipe
The device of surface iron rust.
Background technique
The facility that the main bodys such as guardrail are made of steel pipe is frequently encountered in daily life, due to locating to be subjected in the natural environment
Wind and weather is easy to get rusty, also will cause security risk when being not only repugnant to the eye, but also getting rusty serious on its surface.In day
In normal maintenance, needs to be removed these steel tube surface iron rust, then carry out brushing damp-proof paint etc. again.
Existing iron rust removal tool and equipment, typically using sand paper or the grinding wheel of electronic derusting, using sand paper
Polishing, not only low efficiency, but also heavy workload are higher to manpower requirements；And use electric wheel polishing derusting, then it is easy to appear
Abrasion is also resulted in metal part, to destroy metallic surface；And electric wheel is relatively suitble to and polishing plane, for convex
The bad operation in face and concave surface.
Summary of the invention
In order to solve in the prior art using electric wheel to the existing above problem of steel pipe polishing derusting, the present invention is provided
A kind of for removing the device of steel tube surface iron rust, which is beaten by installing between two fixed disks that polishing axis drives
Dry sanding paper replaces grinding wheel, so that grinding wheel is effectively avoided during the grinding process, since operation does not pay attention to metal product table
It is worn caused by face, and housing is set outside polishing portion, and drive the drawing fan rotation in portion of gathering dust to produce using polishing axis
The iron rust that polishing generates and dust are collected into the portion of gathering dust and are focused on by raw suction, can not only reduce the noise of generation,
And the dust and iron rust for preventing polishing from generating are flown upward everywhere.
The present invention to solve above-mentioned technical problem used by technical solution are as follows: it is a kind of for removing steel tube surface iron rust
Device including a polishing axis for driving it to rotate by power mechanism, is successively set on polishing portion and the portion of gathering dust polished on axis,
Wherein, the polishing portion includes a Sand paper for polishing and setting on polishing axis and the spaced left fixed disk of intermediate tool and the right side are solid
Price fixing, and the two sides of Sand paper for polishing are wrapped on respectively in two fixed disks, to form polishing between two fixed disks
Region, the supporting mechanism for jacking up Sand paper for polishing is provided on the polishing axis between two fixed disks, and supporting mechanism includes one solid
The stop sleeve being scheduled on polishing axis is provided with several support plates around stop sleeve, these support plates are by around support sleeve
The support spring of cylinder setting is supported fixation, and the support spring is in a free state, and support plate supports Sand paper for polishing
The height risen is not less than the brim height of two fixed disks；It is symmetrically arranged with and is fixed on polishing axis on the outside of two fixed disks
Bearing, the two bearings are provided with semi-circular cylindrical or hemispherical housing as fixed base point, which forms
Accommodate the cavity I of polishing portion top half；The portion of gathering dust includes a closing shell being arranged on polishing axis by bearing, should
The cavity II of enclosure is connected to by tracheae with the cavity I in housing, is provided in closing shell and is fixed on polishing
Drawing fan on axis, which generates negative pressure in closing shell in polishing axis rotation process, to pass through tracheae
Iron rust and dust that polishing portion in housing generates are drawn into closing shell, the side far from tracheae is arranged on closing shell
There is exhaust outlet, and is provided with filtration gauze on exhaust outlet.
A kind of preferred embodiment of the invention is that the positioning convex ring on polishing axis is close in the inside of the right fixed disk,
The groove around polishing axis is provided on lateral surface, the side edge of the Sand paper for polishing is in the groove, sets in the groove
The right annular cover plate around polishing axis is set, and is compressed the side edge of right annular cover plate and Sand paper for polishing by several fixing screws
It is fixed in groove；The other side of the Sand paper for polishing is arranged in the ring-shaped depression of left fixed disk lateral surface, and passes through fastening
Screw and left annular cover plate are fixed in the ring-shaped depression.
Another preferred embodiment of the invention is that the right fixed disk passes through a Macintosh and the fixed biography of polishing axis
Dynamic, which includes one holding out against the step key of positioning convex ring and holding out against the taper key of the step key, wherein step key be height not
Deng two flat keys be composed, and higher-height part resists positioning convex ring, and taper key is that the top of one end is the flat of inclined-plane
Key, and have bevelled one end and a lower height of part of step key and push against, to form the recessed of right-angled trapezium shape between the two
It falls into.
Another preferred embodiment of the invention is that the stop sleeve is made of abrasive rubber, support thereon
Spring is distributed with four groups along the axial direction of stop sleeve, and each group of spring by several groups around stop sleeve forms.
In the present invention, every support plate is arc, and all support plates are respectively positioned on same circumference.
Another preferred embodiment of the invention is that the closing shell is discoid, and its edge is arc convex,
The edge inner wall of arc convex is provided with several magnet strips, the iron rust generated for adsorbing polishing.
Another preferred embodiment again of the invention is that the open edge of the housing is fixed by fixed plate and bearing
Connection is provided with two pieces of soft curtains in casing base opening, and this two pieces of soft curtains are located at the two sides of polishing axis, with
Housing is cooperated to cover polishing portion when polishing, the dust four for preventing polishing from generating dissipates.
Another preferred embodiment again of the invention is one end setting of the polishing axis far from polishing portion and portion of gathering dust
There is portable shell, the motor and speed reducer of driving polishing axis rotation is provided in portable shell, the power of motor output passes through
Speed reducer drives polishing axis rotation after slowing down, carrying handle, while the portable shell on polishing axis are provided on portable shell
Position between polishing portion is provided with pressing lever by bearing, when operating with, a hand-held carrying handle, and the other hand pressing
Pressing lever, to enable the polishing portion of its other end to be adjacent to the steel pipe for needing to derust polishing axis force.
Another preferred embodiment again of the invention is the axis in the close polishing shaft end portion of closing shell in the portion of gathering dust
It holds and is fixed by the fastening nut of polishing shaft end portion setting.
In the present invention, in a free state, the height that support plate props up Sand paper for polishing is not less than the support spring
The brim height of two fixed disks, effect is: when the present apparatus to be placed in recessed cambered surface, can slightly push support
Spring forms cylindric polishing so that it be made to keep sustained height with two fixed disks；And on convex steel part surface of polishing
When, then when such as steel tube surface, firmly support spring can be made to push, to form recessed polishing between two fixed disks
Region, so that steel pipe to be placed to the iron rust on polishing removal surface in the area.
In the present invention, the lateral surface of fixed disk refers to the side back to polishing region, and the medial surface of fixed disk, which refers to, to be in
The side at polishing region edge.
Compared with prior art, the invention has the following beneficial effects:
1) present invention replaces grinding wheel by installing Sand paper for polishing between two fixed disks that polishing axis drives, thus effectively
Avoid grinding wheel during the grinding process, since operation does not pay attention to the abrasion caused by steel tube surface, and two fixed disks it
Between be arranged sand paper be supported by the support system that stop sleeve, support spring and several support plates are formed, thus can
Enough it is suitable for the polishing derusting of a variety of steel tube surfaces such as plane, concave and convex surface；
2) in the present invention, by the way that portion of gathering dust is arranged on polishing axis, which is a closing shell, is arranged in closing shell
There is the shaft-driven drawing fan of polishing, to generate negative pressure in closing shell, and closes shell and pass through tracheae and polishing portion
The housing connection of outside setting reduces polishing derusting so that the iron rust for the dust that polishing generates is drawn into closing shell
When the dust that generates and iron rust pollution, while also taking full advantage of the power that polishing axis rotation generates.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram at left fixed disk；
Fig. 3 is the left view schematic diagram at left fixed disk；
Fig. 4 is the structural schematic diagram of right fixed disk；
Fig. 5 is the structural schematic diagram of the polishing portable shell in axis one end；
Appended drawing reference: 1, axis of polishing, 101, fastening nut, 102, positioning convex ring, 2, left fixed disk, 201, left annular cover plate, 3,
Sand paper for polishing, 4, right fixed disk, 401, groove, 402, right annular cover plate, 403, step key, 404, taper key, 5, supporting mechanism,
501, stop sleeve, 502, support plate, 503, support spring, 6, closing shell, 601, cavity II, 602, magnet strip, 603, mistake
Filter gauze, 604, exhaust outlet, 7, drawing fan, 8, tracheae, 9, housing, 901, cavity I, 902, fixed plate, 903, soft curtain,
10, bearing, 11, portable shell, 12, carrying handle, 13, pressing lever.
Specific embodiment
Technical solution of the present invention is further elaborated combined with specific embodiments below.
Embodiment 1
As shown in Figure 1, it is a kind of for removing the device of steel tube surface iron rust, beating for its rotation is driven by power mechanism including one
Mill axis 1, the polishing portion being successively set on polishing axis 1 and portion of gathering dust, wherein the polishing portion includes 3 He of Sand paper for polishing
Setting is on polishing axis 1 and centre has spaced left fixed disk 2 and right fixed disk 4, and the two sides of Sand paper for polishing 3 are wrapped up respectively
It is fixed in two fixed disks, so that polishing region is formed between two fixed disks, the polishing axis 1 between two fixed disks
On be provided with jack up Sand paper for polishing 3 supporting mechanism 5, supporting mechanism 5 include one be fixed on polishing axis 1 on stop sleeve 501,
Stop sleeve 501 is provided with several support plates 502, the support that these support plates 502 are arranged by surrounding stop sleeve 501
Spring 503 is supported fixation, and the support spring 503 is in a free state, and support plate 502 props up Sand paper for polishing 3
Height be not less than two fixed disks brim height；It is symmetrically arranged with and is fixed on polishing axis 1 on the outside of two fixed disks
Bearing 10, semi-circular cylindrical or hemispherical housing 9 are provided with using the two bearings 10 as fixed base point, in the housing 9
Portion forms the cavity I 901 for accommodating polishing portion top half；The portion of gathering dust is arranged on polishing axis 1 including one by bearing 10
Closing shell 6, the cavity II 601 inside the closing shell 6 is connected to the cavity I 901 in housing 9 by tracheae 8, closed
Be provided in shell 6 be fixed on polishing axis 1 on drawing fan 7, the drawing fan 7 with polishing 1 rotation process of axis in closing
Negative pressure is generated in shell 6, so that iron rust and dust that polishing portion in housing 9 generates are drawn into closing shell 6 by tracheae 8
Interior, the side far from tracheae 8 is provided with exhaust outlet 604 on closing shell 6, and is provided with filtration gauze on exhaust outlet 604
603。
The above are basic embodiments of the invention, further can be improved and be optimized on the basis of above, thus
To following embodiment:
Embodiment 2
The present embodiment is a kind of improvement project to embodiment 1, as shown in figure 4, polishing axis is close in the inside of the right fixed disk 4
Positioning convex ring 102 on 1, the groove 401 around polishing axis 1 is provided on lateral surface, and the side edge of the Sand paper for polishing 3 is in
In the groove 401, the right annular cover plate 402 around polishing axis 1 is set in the groove 401, and will by several fixing screws
The side edge of right annular cover plate 402 and Sand paper for polishing 3 is pressed abd fixed in groove 401；As shown in Fig. 2, the Sand paper for polishing 3
The other side is arranged in the ring-shaped depression of left 2 lateral surface of fixed disk, and is fixed by fastening screw with left annular cover plate 201
In the ring-shaped depression.
Embodiment 3
The present embodiment is another improvement project to embodiment 1, as shown in figure 4, the right fixed disk 4 by a Macintosh with
Polishing 1 fixed conveyor of axis, the Macintosh include a step key 403 for holding out against positioning convex ring 102 and hold out against the oblique of the step key 403
Key 404, wherein step key 403 is that two flat keys that height does not wait are composed, and higher-height part resists positioning convex ring
102, taper key 404 is that the top of one end is the flat key on inclined-plane, and has bevelled one end and a lower height of part of step key 403
It pushes against, to form the recess of right-angled trapezium shape between the two.
Embodiment 4
The present embodiment is another improvement project to embodiment 1, as shown in Figure 1, the stop sleeve 501 uses abrasive rubber
It is made, support spring 503 thereon is distributed with four groups along the axial direction of stop sleeve 501, and each group has several groups around support
The spring of sleeve 501 forms.
Embodiment 5
The present embodiment is another improvement project to embodiment 1, as shown in Figure 1, every support plate 502 is arc,
And all support plates 502 are respectively positioned on same circumference, and when support spring 503 is compressed to minimum, all support plates
502 surround a round tube.
Embodiment 6
The present embodiment is another improvement project to embodiment 1, as shown in Figure 1, the closing shell 6 is discoid, and its
Edge is arc convex, and the edge inner wall of arc convex is provided with several magnet strips 602, the iron generated for adsorbing polishing
Rust；These magnet strips 602 are removably to be arranged in closing shell 6, and be provided with and can beat on closing shell 6
The maintenance door opened, consequently facilitating dust and iron rust inside sweeping.
Embodiment 7
The present embodiment is another improvement project to embodiment 1, as shown in figure 3, the open edge of the housing 9 passes through fixation
Plate 902 is fixedly connected with bearing 10, and two pieces of soft curtains 903, and this two pieces of soft curtains 903 are provided at 9 bottom opening of housing
The two sides of polishing axis 1 are located at, to cooperate housing 9 to cover polishing portion in polishing, the dust four for preventing polishing from generating dissipates.
Embodiment 8
The present embodiment is another improvement project to embodiment 1, as shown in figure 5, the polishing axis 1 is far from polishing portion and gathers dust
The one end in portion is provided with portable shell 11, and the motor and speed reducer that driving polishing axis 1 rotates is provided in portable shell 11,
Carrying handle 12 is provided on portable shell 11, while the position on polishing axis 1 between portable shell 11 and polishing portion passes through
Bearing is provided with pressing lever 13.
Embodiment 9
The present embodiment is another improvement project to embodiment 1, is beaten as shown in Figure 1, the closing shell 6 in the portion of gathering dust is close
The bearing 10 of mill 1 end of axis is fixed by the fastening nut 101 of polishing 1 end of axis setting.
Embodiment 10
The present embodiment is another improvement project to embodiment 1, and the exhaust outlet 604 is rectangular tubular, and side wall has on it
There is slot, a rectangle frame is inserted into the slot, the filtration gauze 603 is fixed in the rectangle frame, and can be with
The number of plies of filtration gauze 603 is set as needed, there is gap between each layer of filtration gauze 603.
In the above various embodiments of the invention, the power resources of the motor can be battery, be also possible to using just
Close electric wire and socket.
Claims (9)
1. a kind of for removing the device of steel tube surface iron rust, it is characterised in that: drive its rotation by power mechanism including one
Polishing axis (1), the polishing portion that is successively set in polishing axis (1) and gather dust portion, wherein the polishing portion includes a polishing
Sand paper (3) and setting are in polishing axis (1) and intermediate have spaced left fixed disk (2) and right fixed disk (4), and Sand paper for polishing
(3) two sides are wrapped on respectively in two fixed disks, so that polishing region is formed between two fixed disks, it is solid at two
The supporting mechanism (5) for jacking up Sand paper for polishing (3) is provided on polishing axis (1) between price fixing, supporting mechanism (5) includes one fixed
Stop sleeve (501) in polishing axis (1) is provided with several support plates (502) around stop sleeve (501), these branch
Fagging (502) is by being supported fixation, and the support spring around the support spring (503) of stop sleeve (501) setting
(503) in a free state, the height that support plate (502) props up Sand paper for polishing (3) is not less than the edge of two fixed disks
Highly；It is symmetrically arranged with the bearing (10) being fixed in polishing axis (1) on the outside of two fixed disks, utilizes the two bearings
(10) fixed base point is provided with semi-circular cylindrical or hemispherical housing (9), is formed and is accommodated in polishing portion inside the housing (9)
The cavity I (901) of half part；The portion of gathering dust includes a closing shell by bearing (10) setting in polishing axis (1)
(6), the internal cavity II (601) of the closing shell (6) is connected to by tracheae (8) with the cavity I (901) in housing (9), is being sealed
The drawing fan (7) being fixed in polishing axis (1) is provided in closed shell body (6), which rotates with polishing axis (1)
Negative pressure is generated in closing shell (6) in the process, thus the iron rust and ash that the interior polishing portion of housing (9) are generated by tracheae (8)
Dirt is drawn into closing shell (6), and the side in closing shell (6) far from tracheae (8) is provided with exhaust outlet (604), and
Filtration gauze (603) are provided on exhaust outlet (604).
2. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the right fixation
The positioning convex ring (102) in polishing axis (1) is close in the inside of disk (4), and the groove around polishing axis (1) is provided on lateral surface
(401), the side edge of the Sand paper for polishing (3) is in the groove (401), and setting is around polishing axis in the groove (401)
(1) right annular cover plate (402), and by several fixing screws by the side edge of right annular cover plate (402) and Sand paper for polishing (3)
It is pressed abd fixed in groove (401)；The other side setting of the Sand paper for polishing (3) is recessed in the annular of left fixed disk (2) lateral surface
In falling into, and it is fixed in the ring-shaped depression by fastening screw and left annular cover plate (201).
3. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the right fixation
For disk (4) by a Macintosh and polishing axis (1) fixed conveyor, which includes a step key for holding out against positioning convex ring (102)
(403) and the taper key (404) of the step key (403) is held out against, wherein step key (403) is height not two equal flat keys combination
It forms, and higher-height part resists positioning convex ring (102), taper key (404) is that the top of one end is the flat key on inclined-plane, and is had
Bevelled one end and step key (403) a lower height of part push against, to form the recess of right-angled trapezium shape between the two.
4. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the support sleeve
Cylinder (501) is made of abrasive rubber, and support spring (503) thereon is distributed with four groups along the axial direction of stop sleeve (501), often
One group of spring by several groups around stop sleeve (501) forms.
5. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: every branch
Fagging (502) is arc, and all support plates (502) are respectively positioned on same circumference.
6. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the closing shell
Body (6) is discoid, and its edge is arc convex, is provided with several magnet strips (602) in the edge inner wall of arc convex, is used
In the iron rust that absorption polishing generates.
7. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the housing
(9) open edge is fixedly connected by fixed plate (902) with bearing (10), is provided with two pieces at housing (9) bottom opening
Soft curtain (903), and this two pieces of soft curtains (903) are located at the two sides of polishing axis (1), to cooperate housing (9) in polishing
Polishing portion is covered, the dust four for preventing polishing from generating dissipates.
8. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the polishing axis
(1) one end far from polishing portion and portion of gathering dust is provided with portable shell (11), and driving polishing is provided in portable shell (11)
The motor and speed reducer of axis (1) rotation, is provided with carrying handle (12) on portable shell (11), while in polishing axis (1)
Position between portable shell (11) and polishing portion is provided with pressing lever (13) by bearing.
9. according to claim 1 a kind of for removing the device of steel tube surface iron rust, it is characterised in that: the portion of gathering dust
Closing shell (6) close to polishing axis (1) end bearing (10) by polishing axis (1) end setting fastening nut (101)
It is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811364747.XA CN109333300A (en) | 2018-11-16 | 2018-11-16 | It is a kind of for removing the device of steel tube surface iron rust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811364747.XA CN109333300A (en) | 2018-11-16 | 2018-11-16 | It is a kind of for removing the device of steel tube surface iron rust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109333300A true CN109333300A (en) | 2019-02-15 |
Family
ID=65315720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811364747.XA Withdrawn CN109333300A (en) | 2018-11-16 | 2018-11-16 | It is a kind of for removing the device of steel tube surface iron rust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109333300A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390294A (en) * | 2020-04-24 | 2020-07-10 | 山东卓文建设有限公司 | Metal pipe rust cleaning dust keeper |
| CN111604741A (en) * | 2020-05-29 | 2020-09-01 | 杨二春 | Low-loss alternating sander |
| CN112900830A (en) * | 2021-01-28 | 2021-06-04 | 刘凤 | Building scaffold iron pipe surface impurity cleaning device and using method |
-
2018
- 2018-11-16 CN CN201811364747.XA patent/CN109333300A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390294A (en) * | 2020-04-24 | 2020-07-10 | 山东卓文建设有限公司 | Metal pipe rust cleaning dust keeper |
| CN111390294B (en) * | 2020-04-24 | 2021-05-28 | 山东卓文建设有限公司 | Metal pipe rust cleaning dust keeper |
| CN111604741A (en) * | 2020-05-29 | 2020-09-01 | 杨二春 | Low-loss alternating sander |
| CN112900830A (en) * | 2021-01-28 | 2021-06-04 | 刘凤 | Building scaffold iron pipe surface impurity cleaning device and using method |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190215 |
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| WW01 | Invention patent application withdrawn after publication |