CN101181703B - Powder flame-thrower nozzle - Google Patents
Powder flame-thrower nozzle Download PDFInfo
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- CN101181703B CN101181703B CN2007101795576A CN200710179557A CN101181703B CN 101181703 B CN101181703 B CN 101181703B CN 2007101795576 A CN2007101795576 A CN 2007101795576A CN 200710179557 A CN200710179557 A CN 200710179557A CN 101181703 B CN101181703 B CN 101181703B
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Abstract
The invention relates to a powder flame spray gun nozzle, comprising an inner core and an outer casing made of red copper; a mix cavity is arranged between the inner core and the outer casing; a plurality of gas inlets are evenly distributed along the circumferential direction at the left end of the inner core; a power-feeding hole is arranged in the center of the inner core, the cross section of the power-feeding hole is formed by smoothly connecting the two symmetric convex arcs and two symmetric concave arcs, and the convex arc and the concave arc are tangent and the radius of the convex arc is smaller than that of the concave arc; a plurality of gas outlets that surround the power-feeding hole are arranged at the right end of the outer casing; and the connecting line of the centers of any gas outlets and the power-feeding hole and the connecting line of the center of two adjacent gas outlets and the center of the powder-feeding hole form two equal angles. The invention is the powder flame spray gun nozzle applicable to the spraying of the work pieces of slender rods, which sprays the powder on the cross section distributed approximately in the strip shape in the space. The efficiency of the overlay powder is enhanced and the manufacturing cost is reduced.
Description
Technical field
The present invention relates to a kind of powder flame-thrower nozzle.
Background technology
Flame spray powder coating is that the employing oxy-acetylene flame is a thermal source, and sprayed on material is the heat spraying method of powder, and equipment is simple, and the material category of spraying is many, is to use the most general hot-spraying technique.Nozzle such as Fig. 4, Fig. 5, shown in Figure 6 that oxy-acetylene flame spray powder coating spray gun adopts, comprise inner core 1 and overcoat 2, form a hybrid chamber 3 between inner core 1 and the overcoat 2, inner core 1 center has circular powder feeding hole 5, overcoat 2 right-hand members are provided with several the along the circumferential direction equally distributed ventholes 4 around powder feeding hole 5, and inner core 1 left end is provided with several along the circumferential direction equally distributed air admission holes 6.In flame spraying process, oxygen and acetylene gaseous mixture enter hybrid chamber 3 by air admission hole 6, produce combustion flame from venthole 4 ejections again after fully mixing in hybrid chamber 3; From powder feeding hole 5 ejections, dusty spray is cone shape and ejects from powder feeding hole 5 dusty spray, enters combustion flame with the powder feeding air-flow, is heated fusing or softening, and the molten grain of flame flow promotion is ejected into surface of the work with certain speed and forms coating.Because powder feeding hole 5 cross sectional shapes be circle, in the spraying operation of reality, when workpiece was thin bar, being dispersing of cone shape had the part dusty spray can descend slowly and lightly in air and loses in the dusty spray, and the powder utilization of dusty spray is lower.
Summary of the invention
The purpose of this invention is to provide a kind of suitable powder flame-thrower nozzle that thin bar workpiece is sprayed, making from the dusty spray of powder flame-thrower nozzle ejection is the powder distribution of approximate strip cross section in spatial distributions, to improve the powder utilization of dusty spray, reduce production costs.
For achieving the above object, the present invention takes following design:
A kind of powder flame-thrower nozzle, comprise inner core and the overcoat made by red copper, form a hybrid chamber between inner core and the overcoat, the inner core left end is provided with several along the circumferential direction equally distributed air admission holes, it is characterized in that the inner core center has powder feeding hole, the cross section of powder feeding hole is smooth being formed by connecting of concave arc by the dome arc of two symmetries and two symmetries, and dome arc and concave arc are tangent, and the radius of dome arc is less than the radius of concave arc; The overcoat right-hand member is provided with several ventholes around powder feeding hole, and the two angle angular dimensions that the line at the center of the line at the center of any one venthole and the center of powder feeding hole and the center of adjacent two ventholes and powder feeding hole forms are identical.
The radius of forming the concave arc of powder feeding hole is 1.2mm～2.0mm, the distance of center circle of two concave arcs is 1.2～1.5 times of radius of concave arc, the radius of dome arc is 0.3～0.5 times of radius of concave arc, and the minimum range between the center of venthole and the nearest concave arc is 2.5～3.0 times of radius of concave arc.
The center of 2 ventholes in the venthole lays respectively on the line of symmetry of two concave arcs, has the center of 2 ventholes to lay respectively on the line of symmetry of two dome arcs in the venthole in addition.
The quantity of venthole is 8～16.
Advantage of the present invention is:
A kind of powder flame-thrower nozzle of the present invention, it is assembled by inner core and overcoat, forms a hybrid chamber between the two, helps the even mixing of oxygen and acetylene gas, promotes completing combustion; The cross section of powder feeding hole is smooth being formed by connecting of concave arc by the dome arc of two symmetries and two symmetries, and dome arc and concave arc are tangent, and the radius of dome arc is less than the radius of concave arc; The overcoat right-hand member is provided with several ventholes around powder feeding hole, the center of any three ventholes is identical with the two angle angular dimensions that the line at the center of powder feeding hole forms, the shape of powder feeding hole can change the spatial distribution of pulverized powder, obtain the powder distribution of approximate rectangular cross section, descend slowly and lightly when making the thin rod member of spraying and reduce, thereby improve the spraying powder utilization to airborne powder; Simultaneously the distribution of venthole makes powder be heated fully, and flame flow has effect of contraction to the powder of molten state, reduce dispersing of powder, guarantee the powder distribution of approximate rectangular cross section, the loss of dusty spray when reducing the thin rod member of spraying, improve powder utilization, reduce production costs.
Description of drawings
Fig. 1 is master's TV structure schematic diagram of the present invention
Fig. 2 is the left TV structure schematic diagram of Fig. 1
Fig. 3 is the right TV structure schematic diagram of Fig. 1
Fig. 4 is a habit formula powder flame-thrower nozzle structural representation
Fig. 5 is the left TV structure schematic diagram of Fig. 4
Fig. 6 is the right TV structure schematic diagram of Fig. 4
The specific embodiment
As Fig. 1, Fig. 2, shown in Figure 3, a kind of powder flame-thrower nozzle of the present invention, comprise inner core 1 and the overcoat 2 made by red copper, form a hybrid chamber 3 between inner core 1 and the overcoat 2, inner core 1 left end is provided with several along the circumferential direction equally distributed air admission holes 6, it is characterized in that, inner core 1 center has powder feeding hole 5, the cross section of powder feeding hole 5 is concave arc 9,10 smooth being formed by connecting by 7,8 and two symmetries of dome arc of two symmetries, and dome arc 7,8 and concave arc 9,10 are tangent, and the radius of dome arc 7,8 is less than the radius of concave arc 9,10; Overcoat 2 right-hand members are provided with several ventholes 4 around powder feeding hole 5, and the two angle angular dimensions that the line of the center O of the line at the center of any one venthole 4 and the center of powder feeding hole 5 and the center of adjacent two ventholes 4 and powder feeding hole 5 forms are identical.
The radius R of forming the concave arc 9,10 of powder feeding hole 5 is 1.2mm～2.0mm, the distance of center circle H of two concave arcs 9,10 is 1.2～1.5 times of radius R of concave arc 9,10, the radius r of dome arc 7,8 is 0.3～0.5 times of radius R of concave arc 9,10, and the minimum range between the center of venthole 4 and the nearest concave arc is 2.5～3.0 times of radius R of concave arc 9,10.
The center of 2 ventholes in the venthole 4 lays respectively on the line of symmetry of two concave arcs 9,10, has the center of 2 ventholes to lay respectively on the line of symmetry of two dome arcs 7,8 in the venthole 4 in addition.
The quantity of venthole 4 is 8～16.
Claims (4)
1. powder flame-thrower nozzle, comprise inner core (1) and the overcoat (2) made by red copper, form a hybrid chamber (3) between inner core (1) and the overcoat (2), inner core (1) left end is provided with several along the circumferential direction equally distributed air admission holes (6), it is characterized in that, inner core (1) center has powder feeding hole (5), the cross section of powder feeding hole (5) is the dome arc (7 by two symmetries, 8) and the concave arc (9 of two symmetries, 10) smooth being formed by connecting, and dome arc (7,8) and concave arc (9,10) tangent, dome arc (7,8) radius is less than concave arc (9,10) radius; Overcoat (2) right-hand member is provided with at least 4 ventholes (4) around powder feeding hole (5), and the two angle angular dimensions that the line at the center (O) of the line at the center of any one venthole (4) and the center of powder feeding hole (5) and the center of adjacent two ventholes (4) and powder feeding hole (5) forms are identical.
2. powder flame-thrower nozzle according to claim 1, it is characterized in that: the radius (R) of forming the concave arc (9,10) of powder feeding hole (5) is 1.2mm～2.0mm, the distance of center circle (H) of two concave arcs (9,10) is 1.2～1.5 times of radius (R) of concave arc (9,10), the radius (r) of dome arc (7,8) is 0.3～0.5 times of radius (R) of concave arc (9,10), and the minimum range between the center of venthole (4) and the nearest concave arc is 2.5～3.0 times of radius (R) of concave arc.
3. powder flame-thrower nozzle according to claim 1 and 2, it is characterized in that: the center of 2 ventholes in the venthole (4) lays respectively on the line of symmetry of two concave arcs (9,10), has the center of 2 ventholes to lay respectively on the line of symmetry of two dome arcs (7,8) in the venthole (4) in addition.
4. powder flame-thrower nozzle according to claim 1 and 2 is characterized in that: the quantity of venthole (4) is 8～16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101795576A CN101181703B (en) | 2007-12-14 | 2007-12-14 | Powder flame-thrower nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101795576A CN101181703B (en) | 2007-12-14 | 2007-12-14 | Powder flame-thrower nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101181703A CN101181703A (en) | 2008-05-21 |
| CN101181703B true CN101181703B (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101795576A Active CN101181703B (en) | 2007-12-14 | 2007-12-14 | Powder flame-thrower nozzle |
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| CN (1) | CN101181703B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561880B (en) * | 2014-12-18 | 2017-12-22 | 安东石油技术（集团）有限公司 | A kind of flame spraying gun and spray equipment |
| CN113957376A (en) * | 2021-10-25 | 2022-01-21 | 中机凯博表面技术江苏有限公司 | Inner hole dual-fuel supersonic flame spray gun and spraying method |
| CN114525464B (en) * | 2022-01-22 | 2024-01-26 | 西北工业大学 | Spraying device based on rotatory knocking |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201137935Y (en) * | 2007-12-14 | 2008-10-22 | 安东石油技术（集团）有限公司 | Powder flame spray gun nozzle |
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- 2007-12-14 CN CN2007101795576A patent/CN101181703B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201137935Y (en) * | 2007-12-14 | 2008-10-22 | 安东石油技术（集团）有限公司 | Powder flame spray gun nozzle |
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| Publication number | Publication date |
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| CN101181703A (en) | 2008-05-21 |
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