CN104313254A - Method and equipment for treating inner surface of elbow pipe with plasma technology - Google Patents
Method and equipment for treating inner surface of elbow pipe with plasma technology Download PDFInfo
- Publication number
- CN104313254A CN104313254A CN201410597276.2A CN201410597276A CN104313254A CN 104313254 A CN104313254 A CN 104313254A CN 201410597276 A CN201410597276 A CN 201410597276A CN 104313254 A CN104313254 A CN 104313254A
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- China
- Prior art keywords
- plasma
- cantilever
- gun
- elbow pipe
- bend pipe
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a method for treating an inner surface of an elbow pipe with a plasma technology. The method comprises the following steps: regulating a plasma gun clamping cantilever to be close to the shape of a pipeline to be processed; moving the head of a plasma gun from one end to the other end along the inner wall of the elbow pipe; rotating the plasma gun by a proper angle; reversely moving the head of the plasma gun to an original end along the inner wall of the elbow pipe; continuously rotating the plasma gun by a proper angle in an original direction; and repeating the previous movements until the entire processing is completed. The invention discloses plasma equipment applicable to the method for processing, and the equipment mainly comprises a small-size plasma gun, a gun rotation device, a telescopic supporting arm, a curvature degree adapting cantilever and a rotation platform. The method and the equipment for treating the inner surface of the elbow pipe with the plasma technology, which are disclosed by the invention, can be applied to the plasma surface treatment of the inner walls of pipelines with different bending radius arcs, and are good for improving the material property of the inner surface of the elbow pipe and prolonging the service life of the elbow pipe.
Description
Technical field
The invention belongs to heat plasma technology field, be specifically related to the method and apparatus that a kind of plasma technology carries out bend pipe inner surface treatment.
Background technology
Thermal plasma is by utilizing extra electric field or high-frequency induction electric field, make gaseous conduction and ionization and produce, its main component is electronics, ion, neutral particle and photon four kinds of particles.After heat plasma technology mainly utilizes effect by compression, the plasma jet of high temperature and high speed carries out various processing to material.The gas temperature that thermal plasma can reach than usual combustion system is much higher, its energy density be only second to laser and electron beam and heat plasma technology to have equipment simple, equipment cost is low, continuous seepage ability is strong, security advantages of higher, is more suitable for dropping into large-scale industrial production and uses.
Plasma surface quench has rate of heating and is exceedingly fast, heat affected zone is very little, speed of cooling also quickly waits outstanding advantage, after hard surfacing, workpiece can form the quenching structure of meticulous densification, increase substantially surface hardness and the wear resistance of workpiece, and workpiece deformation is very little, can carry out following process assembly process without the need to straightening, be a kind of ideal quenching method.The coating structure densification of plasma spraying is smooth, and coat-thickness can accurately control, and spray efficiency is high, has the advantage that other conventional spray paint do not reach.
Current plasma surface quench is mainly used in the revolution steel part of the smooth steel part of any surface finish or symmetrical configuration, for bend pipe hard surfacing process is the outside surface concentrating on bend pipe mostly, the process of inner surface is relatively less, and difficulty is also larger, cost is relatively high, and plasma spraying also has identical limitation.
Inner-walls of duct requires very high to material surface physics, chemical property.Especially the internal surface of bend pipe bears larger shock load, and its wearing and tearing are even more serious.But little for the treatment process carried out bend pipe internal surface, this makes bend pipe become ducted consumable accessory, and its duration of service is shorter, and change inconvenient, have disadvantageous effect to industrial production.
Summary of the invention
The object of the invention is: for the problems referred to above, a kind of plasma technology is provided to carry out the method and apparatus of bend pipe inner surface treatment, the plasma surface treatment technology with good treatment effect is used for bend pipe inner surface treatment, improve the physicochemical property of bend pipe internal surface, and then work-ing life of bend pipe in prolongation industry, save metals resources.
The invention provides a kind of method of plasma treatment bend pipe internal surface, the method is:
(1) regulate plasma gun clamping cantilever close with the shape of process pipeline;
(2) plasma gun head moves to the other end along elbow internal wall from one end;
(3) plasma gun rotates proper angle;
(4) plasma gun head is along elbow internal wall reversing motion to initial end;
(5) original direction continuation rotation proper angle pressed by plasma gun;
(6) motion of above-mentioned 4-7 is repeated, until whole process completes.
According to the method described above, the plasma technology bend pipe Inwall treating equiment matched with it is made up of small-sized plasma torch (4), spray gun swivel arrangement (5), telescopic support arm (8), camber adaptation cantilever (6), rotation platform (3), telescopic support arm and camber adapt to cantilever and are connected through the hinge, telescopic support arm is connected on rotation platform, small-sized plasma torch and spray gun swivel arrangement form and are rotatably connected, and are connected in camber by spray gun swivel arrangement and adapt on cantilever.
According to above-mentioned plasma technology bend pipe Inwall treating equiment, it is characterized in that: camber adapts to cantilever and adopts multi-segment structure, and be connected through the hinge between section and section, and each section is hollow structure, its hollow hinge segment structure number is 8 ~ 15.
Cantilever is adapted to according to above-mentioned camber, can by adjustment cantilevered member, make its cantilever integrally bending degree close with pending elbow curvature degree, such system can carry out plasma quenching art breading to the inner surface of pipeline in the curved footpath of difference.
Adapt to cantilever according to the camber described in such scheme, its hollow structure can facilitate the various water, electricity, gas pipelines needed when placing plasma torch work wherein.Meanwhile, adapt to cantilever according to above-mentioned camber, its cantilever is built-in with water composite cooling pipe, is used for reducing pipeline hyperthermia radiation to the ablation of water, electricity, gas pipe.
According to above-mentioned plasma technology bend pipe Inwall treating equiment, it is characterized in that: telescopic support arm adopts hollow nesting structure (as Fig. 2), and telescopic support arm hollow nested section of number is 3 ~ 8.Adapted to the bend pipe of different radii by adjustment retractable support arm extrusion, expand system process elbow radius specification scope.
Plasma technology bend pipe Inwall treating equiment provided by the invention, can be used on the plasma surface quench of elbow internal wall, plasma surface treatment technology good for treatment effect is used for bend pipe inner surface treatment, improve the physical properties of bend pipe internal surface, and then extend the work-ing life in life and industrial circle of bend pipe, reduce costs, save metals resources, this equipment just can carry out spraying operation with plasma spraying technology add powder conveyer on plasma gun after.The adaptedness of this treatment facility is high, can meet the surface treatment of the elbow internal wall of plurality of specifications.
Accompanying drawing explanation
Fig. 1 is bend pipe inner surface treatment plasma system schematic diagram of the present invention.
Fig. 2 is the structural principle schematic diagram of telescopic support arm of the present invention.
Fig. 3 is plasma jet partial traces stretch-out view.
Wherein: 1-worktable, 2-work holder, 3-rotation platform, 4-small-sized plasma torch, 5-spray gun swivel arrangement, 6-camber adapts to cantilever, 7-pending bend pipe, 8-telescopic support arm.
Embodiment
For better explaining and the present invention being described, below in conjunction with drawings and Examples, the present invention will be further described.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to the accompanying drawings 1, the plasma technology bend pipe Inwall treating equiment that the present invention relates to, adjustment work holder (2) before work, the center of circle of pending bend pipe (7) is overlapped with the center of circle of rotation platform (3), then the length of telescopic support arm (8) is adjusted, make the length of telescopic support arm equal to the distance in the center of circle of rotation platform (3) with bend pipe tangent plane center, finally adjust camber adaptation cantilever (6) and make its pin joint all the time on pending bend pipe (7) tangent plane center circle camber line (i.e. identical radian measure).
As Fig. 3, during the work of bend pipe inner surface treatment plasma system, plasma jet moves to the other end along inner-walls of duct from one end, under the effect of spray gun swivel arrangement (5), plasma gun is rotated, when spray gun moves to initial end, under the effect of spray gun swivel arrangement, plasma gun continues to press original direction and rotates, and system repeats motion above until whole process completes.This system is applicable to the surface treatment of different curved footpaths inner-walls of duct.
The foregoing is only the embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the invention provides a kind of method of plasma treatment bend pipe internal surface, the method is:
(1) regulate plasma gun clamping cantilever close with the shape of process pipeline;
(2) plasma gun head moves to the other end along elbow internal wall from one end;
(3) plasma gun rotates proper angle;
(4) plasma gun head is along elbow internal wall reversing motion to initial end;
(5) original direction continuation rotation proper angle pressed by plasma gun;
(6) motion of above-mentioned 4-7 is repeated, until whole process completes.
2. according to the method described above, the plasma technology bend pipe Inwall treating equiment matched with it is made up of small-sized plasma torch (4), spray gun swivel arrangement (5), telescopic support arm (8), camber adaptation cantilever (6), rotation platform (3), telescopic support arm (8) and camber adapt to cantilever and are connected through the hinge, telescopic support arm (8) is connected on rotation platform (3), small-sized plasma torch (4) and spray gun swivel arrangement (5) form and are rotatably connected, and are connected in camber adaptation cantilever (6) by spray gun swivel arrangement (5).
3. plasma technology bend pipe Inwall treating equiment according to claim 2, it is characterized in that: described camber adapts to cantilever (6) and adopts multi-segment structure, be connected through the hinge between section and section, and each section is hollow structure, its hollow hinge segment structure number is 8 ~ 15.
4. plasma technology bend pipe Inwall treating equiment according to claim 2, is characterized in that: described telescopic support arm (8) adopts hollow nesting structure, and telescopic support arm hollow nested section of number is 3 ~ 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410597276.2A CN104313254B (en) | 2014-10-31 | 2014-10-31 | A kind of plasma technology carries out method and the equipment of bend pipe inner surface treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410597276.2A CN104313254B (en) | 2014-10-31 | 2014-10-31 | A kind of plasma technology carries out method and the equipment of bend pipe inner surface treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104313254A true CN104313254A (en) | 2015-01-28 |
| CN104313254B CN104313254B (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410597276.2A Active CN104313254B (en) | 2014-10-31 | 2014-10-31 | A kind of plasma technology carries out method and the equipment of bend pipe inner surface treatment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD288996A5 (en) * | 1989-11-07 | 1991-04-18 | Dr Wissenschaftlich-Technisches Zentrum,De | DEVICE FOR WELDING AND / OR CUTTING IN LARGE-LAYER, PRISMATICALLY SHAPED PARTS, ESPECIALLY TO RAILROAD CARS |
| CN203664120U (en) * | 2014-01-24 | 2014-06-25 | 中国石化集团胜利石油管理局海上石油工程技术检验中心 | In-pipe anti-corrosion coating sprayer with guide mechanism |
| CN103990580A (en) * | 2014-05-26 | 2014-08-20 | 中海石油深海开发有限公司 | Stepping type paint-spraying device for cylindrical inner walls |
| CN204237817U (en) * | 2014-10-31 | 2015-04-01 | 四川大学 | A kind of plasma technology carries out the equipment of bend pipe inner surface treatment |
-
2014
- 2014-10-31 CN CN201410597276.2A patent/CN104313254B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD288996A5 (en) * | 1989-11-07 | 1991-04-18 | Dr Wissenschaftlich-Technisches Zentrum,De | DEVICE FOR WELDING AND / OR CUTTING IN LARGE-LAYER, PRISMATICALLY SHAPED PARTS, ESPECIALLY TO RAILROAD CARS |
| CN203664120U (en) * | 2014-01-24 | 2014-06-25 | 中国石化集团胜利石油管理局海上石油工程技术检验中心 | In-pipe anti-corrosion coating sprayer with guide mechanism |
| CN103990580A (en) * | 2014-05-26 | 2014-08-20 | 中海石油深海开发有限公司 | Stepping type paint-spraying device for cylindrical inner walls |
| CN204237817U (en) * | 2014-10-31 | 2015-04-01 | 四川大学 | A kind of plasma technology carries out the equipment of bend pipe inner surface treatment |
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| Publication number | Publication date |
|---|---|
| CN104313254B (en) | 2016-06-01 |
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