CN201137935Y

CN201137935Y - Powder flame spray gun nozzle

Info

Publication number: CN201137935Y
Application number: CNU2007201908122U
Authority: CN
Inventors: 孙晋奇; 许�鹏; 缪伟民
Original assignee: Anton Oilfield Services Group Ltd
Current assignee: Anton Oilfield Services Group Ltd
Priority date: 2007-12-14
Filing date: 2007-12-14
Publication date: 2008-10-22
Anticipated expiration: 2017-12-14

Abstract

The utility model relates to a powder flame ejection gun nozzle, which comprises an inner core and an outer sleeve which are made of red copper, a mixed cavity is formed between the inner core and the outer sleeve, a plurality of air inlet holes which are evenly distributed along the circumferential direction are arranged on the left end of the inner core, a powder feeding hole is arranged in the center of the inner core, the cross section of the powder feeding hole is formed through smoothly connecting two symmetrical convex circular arcs and two symmetrical concave circular arcs, the convex circular arcs and the concave circular arcs are tangential, the radius of the convex circular arcs is smaller than the radius of the concave circular arcs, a plurality of air outlet holes which surround the powder feeding hole are arranged on the right end of the outer sleeve, two included angles which are formed between a connecting line of the center of any air outlet hole and the center of any powder feeding hole and the connecting line of the center of two neighboring air outlet holes and the center of the powder feeding hole have same angles. The utility model relates to the powder flame ejection gun nozzle which is suitable for spaying and coating fine rod components, the distribution of sprayed powder which is sprayed from the powder flame ejection gun nozzle in space is close to the powder distribution of a strip-shaped cross section, the powder spaying efficiency for spraying powder is increased and the production cost is lowered.

Description

Powder flame-thrower nozzle

Technical field

The utility model 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 1, 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.

The utility model content

The purpose of this utility model provides 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 utility model is taked following design:

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.

The utility model has the advantages that:

The utility model powder flame-thrower nozzle, 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 the utility model master TV structure schematic diagram

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, the utility model 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 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

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 of two symmetries (9), (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 several 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 concave arc (9) of composition powder feeding hole (5), the radius (R) of (10) are 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.