CN111421458A - Method and device for flexibly removing rust on inner and outer surfaces of special-shaped pipe fitting - Google Patents

Method and device for flexibly removing rust on inner and outer surfaces of special-shaped pipe fitting Download PDF

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Publication number
CN111421458A
CN111421458A CN202010175328.2A CN202010175328A CN111421458A CN 111421458 A CN111421458 A CN 111421458A CN 202010175328 A CN202010175328 A CN 202010175328A CN 111421458 A CN111421458 A CN 111421458A
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CN
China
Prior art keywords
special
shaped pipe
pipe fitting
rust
material box
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
CN202010175328.2A
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Chinese (zh)
Inventor
陈文革
田于波
铁洋
马江江
陈曦冉
路佳荣
杨涛
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Xian University of Technology
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Xian University of Technology
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Filing date
Publication date
Application filed by Xian University of Technology filed Critical Xian University of Technology
Priority to CN202010175328.2A priority Critical patent/CN111421458A/en
Publication of CN111421458A publication Critical patent/CN111421458A/en
Pending legal-status Critical Current

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    • 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
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • 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
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00

Abstract

The invention discloses a device for flexibly removing rust on the inner and outer surfaces of a special-shaped pipe fitting, which comprises a turntable, wherein the top of the turntable is provided with a material box, and the surfaces of the turntables at the two sides of the material box are provided with supporting frames at intervals; a rotatable crankshaft is arranged between the supporting frame and the material box; the crankshaft on the supporting frame on one side is connected with an output shaft of a motor fixed on the surface of the turntable through a belt. The physical means is adopted for removing rust, so that the environmental pollution caused by chemical rust removal is avoided; the rust on the inner surface and the outer surface of the pipe can be removed simultaneously, and only the rust on the inner surface or the outer surface can be removed according to the requirement; the device is simple, the operation is convenient, and the efficiency is high; the rust removing effect on the special-shaped pipe, particularly the pipe with a plurality of bends or sudden changes of the inner diameter is obvious.

Description

Method and device for flexibly removing rust on inner and outer surfaces of special-shaped pipe fitting
Technical Field
The invention belongs to the technical field of metal surface rust removal engineering, relates to a method for flexibly removing rust on the inner or outer surface of a special-shaped pipe fitting, and further relates to a device for removing rust by applying the method.
Background
Corrosion of metals often has disastrous serious consequences, such as fire, explosion, production stoppage, environmental pollution, etc., and causes huge economic losses. Therefore, the rust removal and the surface treatment are the best ways to reduce corrosion, prolong the service life and improve the economic benefit.
Although the existing chemical rust removal method is high in speed, the surface roughness is different, and the method is not suitable for local rust removal; although the operation is convenient by adopting disc polishing, an electric brush and the like, oxide skin is difficult to remove and is not suitable for products with complex shapes; although the shot blasting method can remove oxide skin, the energy consumption is large, and the sand blasting generates raise dust and causes serious pollution.
In recent years, ultrasonic rust removal, laser rust removal, high-pressure jet flow rust removal and the like also appear, but the ultrasonic rust removal, the laser rust removal, the high-pressure jet flow rust removal and the like are limited to a certain extent due to complex equipment, high price and harsh conditions, and are not suitable for traditional industrial application. At present, the surface rust removal and cleaning of petrochemical pipelines, ships, industrial equipment and the like still stays at the manual and partial automatic auxiliary operation level for decades, and has low efficiency, high labor intensity, high environmental pollution, huge cost and poor quality; therefore, it is urgently needed to design and manufacture a rust removing device which is free of pollution, high in efficiency and wide in application.
Disclosure of Invention
The invention aims to provide a method and a device for flexibly removing rust on the inner or outer surface of a special-shaped pipe fitting.
The technical scheme adopted by the invention is that the device for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting comprises a turntable, wherein the top of the turntable is provided with a material box, and the surfaces of the turntables at the two sides of the material box are provided with supporting frames at intervals; a rotatable crankshaft is arranged between the supporting frame and the material box; the crankshaft on the supporting frame on one side is connected with an output shaft of a motor fixed on the surface of the turntable through a belt.
The material case has the sealed upper cover that can open, and the material bottom of the case portion installs the spring, and the number is 4 ~ 6.
The turntable is driven to rotate by a motor at the bottom of the turntable at the speed of 60-120 r/min.
The invention is also characterized in that:
a method for flexibly removing rust on the inner and outer surfaces of a special-shaped pipe fitting comprises the following steps:
step 1, preparing a plurality of wear-resistant media, adjusting the amplitude of a material box to be 1-3 cm, and adjusting the vibration frequency to be 50-60 times/min; the speed of the turntable is 60-120 r/min;
step 2, the wear-resistant medium in the step 1 is filled into the special-shaped pipe fitting to be treated, the filling amount is 10-30% of the volume of the special-shaped pipe fitting, and two ends of the pipe fitting are plugged by rubber;
step 3, placing the special-shaped pipe fittings processed in the step 2 into a material box, wherein the interval between every two adjacent special-shaped pipe fittings is 1-2 cm; if the rust on the outer surface of the special-shaped pipe fitting needs to be removed, filling stones with edges and corners of 5-20 mm in size into the material tank, wherein the filling amount is that the processed special-shaped pipe fitting is submerged and is smaller than the volume of the material tank 2;
step 4, starting the device for polishing, and controlling the time to be 15-30 min;
step 5, removing rubber at two ends of the special-shaped pipe fitting treated in the step 4, introducing high-pressure air with 3-5 atmospheres, and quickly blowing off the wear-resistant medium in the special-shaped pipe fitting for 1-2 min;
step 6, observing the rust removal condition of the tube wall surface by means of an industrial endoscope, and if the surface is bright, the metallic luster can be seen, and loose reddish brown or black iron oxide is not attached, so that the rust is basically removed;
and 7, coating or brushing protective paint on the inner wall of the special-shaped pipe fitting which is rusted completely to prevent the special-shaped pipe fitting from being rusted again.
The wear-resistant medium is angular kaolin or mullite with the grain size of 0.1-1 mm.
The special-shaped pipe fittings for removing embroidery are T-shaped, L-shaped, cross-shaped or wavy and the like.
The invention has the beneficial effects that: the physical means is adopted for removing rust, so that the environmental pollution caused by chemical rust removal is avoided; the rust on the inner surface and the outer surface of the pipe can be removed simultaneously, and only the rust on the inner surface or the outer surface can be removed according to the requirement; the device is simple, the operation is convenient, and the efficiency is high; the rust removing effect on the special-shaped pipe, particularly the pipe with a plurality of bends or sudden changes of the inner diameter is obvious.
Drawings
FIG. 1 is a schematic diagram of the operation of the device for flexibly removing rust on the inner surface of a special-shaped pipe fitting according to the invention;
FIG. 2 is a structural diagram of the device for flexibly removing rust on the inner surface of the special-shaped pipe fitting;
FIG. 3 is an electron microscope image of the surface morphology before and after rust removal in the present invention, wherein (a) is before rust removal and (b) is after rust removal;
FIG. 4 is a three-dimensional topography of a rust-removing surface observed by a laser confocal microscope before rust removal;
FIG. 5 is a three-dimensional topography of the derusted surface observed by a laser confocal microscope after derusting of the invention; in the figure, 1 is a crankshaft, 2 is a material box, 3 is a transmission belt, 4 is a motor, 5 is a spring, 6 is a rotating disc, and 7 is a supporting frame.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the invention adopts the principle of vibration rust removal after filling media in the pipe fitting.
As shown in fig. 2, the device for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting comprises a turntable 6, wherein the top of the turntable 6 is provided with a material tank 2, and the surfaces of the turntables 6 at the two sides of the material tank 2 are provided with supporting frames 7 at intervals; a rotatable crankshaft 1 is arranged between the support frame 7 and the material box 2, and the crankshaft 1 rotates around the support frame 7; the crankshaft 1 on the supporting frame 7 on one side is connected with an output shaft of a motor 4 fixed on the surface of a rotary table 6 through a belt 3, and the motor provides power and adjusts the frequency.
The material case 2 has the sealed upper cover that can open, and the material case 2 bottom is installed spring 5, and the number is 4 ~ 6, through the size and the elasticity of spring 5, adjusts the amplitude.
The turntable 6 is driven to rotate by a motor at the bottom of the turntable, and the speed is 60-120 r/min.
A method for flexibly removing rust on the inner and outer surfaces of a special-shaped pipe fitting comprises the following steps:
step 1, preparing a plurality of wear-resistant media, adjusting the amplitude of the material tank 2 to be 1-3 cm, and adjusting the vibration frequency to be 50-60 times/min; the speed of the turntable is 60-120 r/min;
step 2, the wear-resistant medium in the step 1 is filled into the special-shaped pipe fitting to be treated, the filling amount is 10-30% of the volume of the special-shaped pipe fitting, and two ends of the pipe fitting are plugged by rubber;
step 3, the special-shaped pipe fittings processed in the step 2 are placed into a material box 2, the interval between every two special-shaped pipe fittings is 1-2 cm, if rust on the outer surfaces of the special-shaped pipe fittings needs to be removed, stones with edges and corners of 5-20 mm in size are filled into the material box 2, the filling amount is that the processed special-shaped pipe fittings are submerged, and the filling amount is smaller than the volume of the material box 2;
step 4, starting the device for polishing, and controlling the time to be 15-30 min;
step 5, removing rubber at two ends of the special-shaped pipe fitting treated in the step 4, introducing high-pressure air with 3-5 atmospheres, and quickly blowing off the wear-resistant medium in the special-shaped pipe fitting for 1-2 min;
and 6, observing the rust removal condition of the surface of the pipe wall by using an industrial endoscope, and if the surface is bright, the metallic luster can be seen, and loose reddish brown or black iron oxide is not attached, so that the rust is basically removed.
And 7, coating or brushing protective paint on the inner wall of the special-shaped pipe fitting which is rusted completely to prevent the special-shaped pipe fitting from being rusted again.
The wear-resistant medium is angular kaolin or mullite, and the particle size is 0.1-1 mm.
The special-shaped removing pipe fitting is T-shaped, L-shaped, cross-shaped or wavy and the like.
Example 1 this example is a "T" pipe having a diameter of 20mm and a wall thickness of 5mm
The method comprises the following steps:
step 1, preparing a plurality of angular kaolins with the particle size of 0.1mm, adjusting the amplitude of a material box 2 to be 3cm, and adjusting the vibration frequency to be 60 times/min; the speed of the rotating disc 6 is 120 r/min;
step 2, the wear-resistant medium in the step 1 is filled into the special-shaped pipe fitting to be processed, the filling amount is 30% of the volume of the special-shaped pipe fitting, and two ends of the pipe fitting are plugged by rubber;
step 3, the special-shaped pipe fittings processed in the step 2 are placed into a material box 2, and the interval between every two special-shaped pipe fittings is 2 cm;
step 4, opening the device to polish the inside of the special-shaped pipe fitting, and controlling the time to be 30 min;
step 5, removing rubber at two ends of the special-shaped pipe fitting treated in the step 4, introducing high-pressure air with 5 atm, and quickly blowing off the wear-resistant medium in the special-shaped pipe fitting for 2 min;
step 6, observing the rust removal condition of the tube wall surface by means of an industrial endoscope, and if the surface is bright, the metallic luster can be seen, and loose reddish brown or black iron oxide is not attached, so that the rust is basically removed;
and 7, coating or brushing protective paint on the inner wall of the special-shaped pipe fitting which is rusted completely to prevent the special-shaped pipe fitting from being rusted again.
Example 2, this example for removing the tarnishing of the outer wall of L tubes having a diameter of 50mm and a tube wall thickness of 5mm, comprises the following steps:
step 1, adjusting the amplitude of the material tank 2 to be 1cm, and the vibration frequency to be 50 times/min; the speed of the rotating disc 6 is 90r/min
Step 2, plugging two ends of the special-shaped pipe fitting by using rubber, then loading the special-shaped pipe fitting into the material box 2, wherein the interval between every two adjacent special-shaped pipe fittings is 1cm, and filling stones with edges and corners, the size of which is 15mm, into the material box 2; the loading amount is that the processed special-shaped pipe fittings are submerged and is smaller than the volume of the material box 2;
step 3, opening the device to polish the outside of the special-shaped pipe fitting, and controlling the time to be 22 min;
step 4, removing rubber at two ends of the special-shaped pipe fitting treated in the step 3, introducing high-pressure air with the pressure of 4 atmospheres, and quickly blowing off the wear-resistant medium in the special-shaped pipe fitting for 1 min;
step 5, observing the rust removal condition of the tube wall surface, if the surface is bright, the metallic luster can be seen, and loose reddish brown or black iron oxide is not attached, the rust is basically removed, fig. 3 is a surface appearance electron microscope image before and after rust removal in the embodiment, wherein (a) is before rust removal and (b) is after rust removal;
and 6, coating or brushing protective paint on the inner wall of the special-shaped pipe fitting which is rusted completely to prevent the special-shaped pipe fitting from being rusted again.
Example 3 this example shows the removal of rust from the inner and outer surfaces of a cruciform tube having a tube diameter of 40mm and a wall thickness of 10mm
The method comprises the following steps:
step 1, preparing a plurality of mullite (mixture of silicon oxide and aluminum oxide) with the grain diameter of 0.5mm, adjusting the amplitude of a material tank 2 to be 2cm, and adjusting the vibration frequency to be 55 times/min; the speed of the turntable is 60 r/min;
step 2, the wear-resistant medium in the step 1 is filled into the special-shaped pipe fitting to be processed, the filling amount is 20% of the volume of the special-shaped pipe fitting, and two ends of the pipe fitting are plugged by rubber;
step 3, the special-shaped pipe fittings processed in the step 2 are placed into a material box 2, the interval between every two special-shaped pipe fittings is 1.5cm, stones with edges and corners of 5mm in size are filled into the material box 2, the filling amount is that the processed special-shaped pipe fittings are submerged, and the filling amount is smaller than the volume of the material box 2;
step 4, opening the device to polish the inside and the outside of the special-shaped pipe fitting, and controlling the time to be 15 min;
step 5, removing rubber at two ends of the special-shaped pipe fitting treated in the step 4, introducing high-pressure air of 3 atmospheres, and quickly blowing off the wear-resistant medium in the special-shaped pipe fitting for 1.5 min;
step 6, observing the rust removal condition of the tube wall surface by means of an industrial endoscope, if the surface is bright, the metallic luster can be seen, and loose reddish brown or black iron oxide is not attached, the rust is basically removed, and fig. 4 and 5 are three-dimensional topography graphs of the rust removal surface observed by a laser confocal microscope before and after rust removal in the embodiment;
and 7, coating or brushing protective paint on the inner wall of the special-shaped pipe fitting which is rusted completely to prevent the special-shaped pipe fitting from being rusted again.
The physical means is adopted for removing rust, so that the environmental pollution caused by chemical rust removal is avoided; the rust on the inner surface and the outer surface of the pipe can be removed simultaneously, and only the rust on the inner surface or the outer surface can be removed according to the requirement; the device is simple, the operation is convenient, and the efficiency is high; the rust removing effect on the special-shaped pipe, particularly the pipe with a plurality of bends or sudden changes of the inner diameter is obvious.

Claims (6)

1. The device for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting is characterized by comprising a turntable (6), wherein the top of the turntable (6) is provided with a material box (2), and the surfaces of the turntables (6) on the two sides of the material box (2) are provided with supporting frames (7) at intervals; a rotatable crankshaft (1) is arranged between the support frame (7) and the material box (2); the crankshaft (1) on the supporting frame (7) at one side is connected with an output shaft of a motor (4) fixed on the surface of the turntable (6) through a belt (3).
2. The device for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting according to claim 1, wherein the material tank (2) is provided with an openable sealing upper cover, and the number of the springs (5) is 4-6 and are mounted at the bottom of the material tank (2).
3. The device for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting according to claim 1, wherein the rotary disc (6) is driven to rotate by a motor at the bottom of the rotary disc at a speed of 60-120 r/min.
4. A method for flexibly removing rust on the inner and outer surfaces of a special-shaped pipe fitting by using the device of claim 1, which is characterized by comprising the following steps:
step 1, preparing a plurality of wear-resistant media, adjusting the amplitude of the material box (2) to be 1-3 cm, and adjusting the vibration frequency to be 50-60 times/min; the speed of the turntable (6) is 60-120 r/min;
step 2, the wear-resistant medium in the step 1 is filled into the special-shaped pipe fitting to be treated, the filling amount is 10-30% of the volume of the special-shaped pipe fitting, and two ends of the pipe fitting are plugged by rubber;
step 3, the special-shaped pipe fittings processed in the step 2 are placed into a material box (2), the interval between every two special-shaped pipe fittings is 1-2 cm, if rust on the outer surfaces of the special-shaped pipe fittings needs to be removed, and stones with edges and corners and with the size of 5-20 mm are filled into the material box (2); the loading amount is that the processed special-shaped pipe fittings are submerged and is smaller than the volume of the material box (2);
step 4, starting the device for polishing, and controlling the time to be 15-30 min;
step 5, removing rubber at two ends of the special-shaped pipe fitting treated in the step 4, introducing high-pressure air with 3-5 atmospheres, and quickly blowing off the wear-resistant medium in the special-shaped pipe fitting for 1-2 min;
step 6, observing the rust removal condition of the tube wall surface by means of an industrial endoscope, and if the surface is bright, the metallic luster can be seen, and loose reddish brown or black iron oxide is not attached, so that the rust is basically removed;
and 7, coating or brushing protective paint on the inner wall of the special-shaped pipe fitting which is rusted completely to prevent the special-shaped pipe fitting from being rusted again.
5. The method for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting according to claim 4, wherein the wear-resistant medium is angular kaolin or mullite, and the particle size is 0.1-1 mm.
6. The method for flexibly removing the rust on the inner and outer surfaces of the special-shaped pipe fitting as claimed in claim 4, wherein the special-shaped pipe fitting is T-shaped, L-shaped, cross-shaped or wavy.
CN202010175328.2A 2020-03-13 2020-03-13 Method and device for flexibly removing rust on inner and outer surfaces of special-shaped pipe fitting Pending CN111421458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010175328.2A CN111421458A (en) 2020-03-13 2020-03-13 Method and device for flexibly removing rust on inner and outer surfaces of special-shaped pipe fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010175328.2A CN111421458A (en) 2020-03-13 2020-03-13 Method and device for flexibly removing rust on inner and outer surfaces of special-shaped pipe fitting

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CN111421458A true CN111421458A (en) 2020-07-17

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2344639A1 (en) * 1973-09-05 1975-03-13 Dillenberg Bergische Metall Deburring grinding or polishing of small metal castings - has workpieces inserted into cages with a grinding material and vibrated
SU540727A1 (en) * 1974-06-10 1976-12-30 Рижский Ордена Трудового Красного Знамени Политехнический Институт Resonant Type Vibrator
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2344639A1 (en) * 1973-09-05 1975-03-13 Dillenberg Bergische Metall Deburring grinding or polishing of small metal castings - has workpieces inserted into cages with a grinding material and vibrated
SU540727A1 (en) * 1974-06-10 1976-12-30 Рижский Ордена Трудового Красного Знамени Политехнический Институт Resonant Type Vibrator
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