CN201524627U

CN201524627U - Spray gun nozzle for intersection-converge spraying outside the spray gun

Info

Publication number: CN201524627U
Application number: CN2009202451359U
Authority: CN
Inventors: 索双富; 宋琳; 王志豪; 黄伟峰; 李永健
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2010-07-14
Anticipated expiration: 2019-11-04

Abstract

The utility model relates to a spray gun nozzle for intersection-converge spraying outside the spray gun, comprising a powder sending cap, a mounting hole and a through-hole which are communicated with each other and processed in the powder sending cap, at least two inclined powder sending holes communicated with the through hole and uniformly distributed around the mounting hole, a powder channel communicated with the through hole and processed on the side wall of the powder sending cap, a turbine slice mixing chamber in the mounting hole, wherein the turbine slice mixing chamber is composed of a turbine shell with two liquid channels processed on the tubular side wall and a turbine with two leading grooves on the surface and the two liquid channels are respectively communicated with the two leading grooves and a liquid outlet communicated with the two leading grooves is arranged between the side surface of the turbine shell circular cavity and the side surface of the turbine circular body. The spray gun nozzle sprays three jet currents and completely uniformly mixes the liquid material and the solid powder in the setting area outside the nozzle to ensure the instant collision and intersection-converge of the solid, liquid phases at the spray nozzle to form uniform deposit products and the deposit products are deposited and adhered on the surface of the basal body.

Description

A kind of be used for rifle cross outward the spraying spray tip

Technical field

The utility model belongs to the spray coating mechanical technical field, relates to a kind of spray tip that rifle crosses and sprays that is used for outward.

Background technology

The rifle spraying technology that crosses outward is a kind of novel spraying technology of extensive exploitation in recent years, the modes of mixing spraying outside the High Pressure Gun that adopt in polyureas and polyurethane coating construction more, this spraying method is to adopt spraying equipment, the two-phase highly pressurised liquid is sprayed by High Pressure Gun, and outside High Pressure Gun, mix, make coating.

The present High Pressure Gun that uses, in making the process that needs interpolation pressed powder or fiber coat, often occur that liquid filler is asymmetric to advance hole, sealing is insecure and atomizing particle is big defective, also have pressed powder lack of homogeneity in the liquid sizing material, problem such as deposition and stability are low.Cause High Pressure Gun can not satisfy the needs that new and effective thermal boundary and efficient intumescent coating are made, can not satisfy the needs of high-performance coating service life and reliability again.

Summary of the invention

The purpose of this utility model provides a kind of spray tip that rifle crosses and sprays that is used for outward, and can spray and make the coating of adding pressed powder or fiber, liquid filler symmetry in the manufacturing process of this coating, sealing is firm, and atomizing particle is tiny.

The technical solution of the utility model is achieved in that a kind of spray tip that rifle crosses and sprays that is used for outward, comprise powder feeding cap 8, be processed with the installing hole 12 and the through hole 13 that communicate in the powder feeding cap 8, be evenly equipped with the powder feeding hole 7 that communicates with through hole 13 of at least two inclinations around the installing hole 12, be processed with the powder channel 3 that communicates with through hole 13 on powder feeding cap 8 sidewalls, turbine wheel mixing chamber 4 is installed in the installing hole 12

Described turbine wheel mixing chamber 4 comprises the turbine shroud 9 of tubular, the inner chamber of turbine shroud 9 is made up of cylindrical cavity and round platform cavity, the big end of this round platform cavity is connected with cylindrical cavity, be symmetrily processed with two fluid passages 2 that communicate with turbine shroud 9 inner chambers on the sidewall of turbine shroud 9, be provided with turbine body 10 in the inner chamber of turbine shroud 9, turbine body 10 is made of cylinder that is connected and Rotary-table, the Rotary-table of turbine body 10 stretches in the round platform chamber of turbine shroud 9, the outer surface of turbine body 10 is processed with disconnected two spirality helical pitch grooves 11 mutually, one end of two helical pitch grooves 11 lays respectively at periphery, and communicate with fluid passage 2 respectively, the other end of helical pitch groove 11 is positioned at turbine body 10 Rotary-table surfaces, be processed with air outlet slit 5 in the turbine body 10, be processed with the air duct 1 that communicates with air outlet slit 5 on the end face of turbine body 10, the tapering of turbine shroud 9 round platform chamber side surfaces is greater than the tapering of turbine body 10 Rotary-table side surfaces, forms the liquid outlet 6 that communicates with two helical pitch grooves 11 between the side surface in turbine shroud 9 round platform chambeies and the side surface of turbine body 10 Rotary-tables.

Described powder feeding hole 7 along the centre of gyration line of powder feeding cap 8, from the end face of powder feeding cap 8 inwardly away from the centre of gyration line of powder feeding cap 8.

Described powder feeding hole 7 is six.

The diameter of described installing hole 12 is less than the diameter of through hole 13.

One end of described turbine wheel mixing chamber 4 stretches in the installing hole 12, and the end face of the end face of turbine wheel mixing chamber 4 and powder feeding cap 8 is in same plane.

The utility model nozzle has adopted turbine wheel mixing chamber structure, make the rotation ejection from nozzle respectively of pressed powder, high pressure draught and liquid sizing material, make full use of air-assisted atomization, optimized that the mixing that simple high-pressure atomization exists is inhomogeneous, the regional length of jet atomization, be difficult to a difficult problem such as control, two kinds of atomizing types are combined, greatly improve particle the cross probability and the area that crosses, thereby guaranteed the quality and the efficient of spraying.

Description of drawings

Fig. 1 is the structural representation of the utility model spray tip.

Fig. 2 is the upward view of Fig. 1.

Fig. 3 is the structural representation of powder feeding cap in the utility model spray tip.

Fig. 4 is the vertical view of Fig. 3.

Fig. 5 is the structural representation of swirl plate mixing chamber in the utility model spray tip.

Among the figure, 1. air duct, 2. fluid passage, 3. powder channel, 4. turbine wheel mixing chamber, 5. air outlet slit, 6. liquid outlet, 7. powder feeding hole, 8. powder feeding cap, 9. turbine shroud, 10. turbine body, 11. helical pitch grooves, 12. installing holes, 13. through holes.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

As depicted in figs. 1 and 2, the structure of the utility model spray tip, comprise structure powder feeding cap 8 as shown in Figure 3 and Figure 4, be coaxially arranged with the installing hole 12 and the through hole 13 that communicate in the powder feeding cap 8, the diameter of installing hole 12 is less than the diameter of through hole 13, be evenly equipped with the powder feeding hole 7 of six inclinations around the installing hole 12, powder feeding hole 7 communicates with through hole 13, from the end face of powder feeding cap 8 along in the centre of gyration alignment of powder feeding cap 8, powder feeding hole 7 is away from the centre of gyration line of powder feeding cap 8, turbine wheel mixing chamber 4 is installed in the installing hole 12, one end of turbine wheel mixing chamber 4 stretches in the installing hole 12, the end face of its end face and powder feeding cap 8 is in same plane, the other end of turbine wheel mixing chamber 4 passes through hole 13 and stretches out outside the powder feeding cap 8, is processed with a powder channel 3 on powder feeding cap 8 sidewalls, and powder channel 3 communicates with through hole 13.

As shown in Figure 5, the structure of turbine wheel mixing chamber 4 in the utility model nozzle, the turbine shroud 9 that comprises tubular, the inner chamber of turbine shroud 9 is made up of two parts, wherein a part is a cylindrical cavity, another part is the round platform cavity, and the big end of this round platform cavity and cylindrical cavity smooth connection are symmetrily processed with two fluid passages 2 that communicate with its inner chamber on the sidewall of turbine shroud 9.Be provided with turbine body 10 in the inner chamber of turbine shroud 9, turbine body 10 is made of cylinder that joins successively and Rotary-table, the Rotary-table of turbine body 10 stretches in the round platform chamber of turbine shroud 9, its end face is mutually concordant with the end face of turbine shroud 9, the outer surface of turbine body 10 is processed with disconnected two spiral helical pitch grooves 11 mutually, one end of two helical pitch grooves 11 lays respectively at turbine body 10 peripheries, and communicate with fluid passage 2 on the turbine shroud 9 respectively, the other end of helical pitch groove 11 is positioned at the Rotary-table surface, be processed with air outlet slit 5 in the turbine body 10, air outlet slit 5 runs through turbine body 10, the cylinder of turbine body 10 stretches out outside the turbine shroud 9 away from an end of Rotary-table, is processed with the air duct 1 that communicates with air outlet slit 5 on the end face of this end.The tapering of turbine shroud 9 round platform chamber side surfaces is greater than the tapering of turbine body 10 Rotary-table side surfaces, form the gap between the side surface of the side surface in turbine shroud 9 round platform chambeies and turbine body 10 Rotary-tables, this gap is a liquid outlet 6, and liquid outlet 6 communicates with two helical pitch grooves 11.

The course of work of the utility model nozzle:

Air duct 1 is communicated with the compressed air central tube, and fluid passage 2 is communicated with the liquid material conveyance conduit, and powder channel 3 is communicated with the pressed powder conveyance conduit.The start-up control compression set, this compression set is delivered to spray gun with air compression back by central tube, and the circulation of air pipeline in spray gun enters air duct 1, through air outlet slit 5 ejections, forms air-spray.After the liquid material heating, deliver to spray gun by liquid conducting pipes, liquid line in spray gun enters two fluid passages 2 respectively, the liquid material that enters two fluid passages 2 is under the high pressure effect, along 11 operations of helical pitch groove, behind the Rotary-table surface of arrival turbine body 10, carry out premixed, from liquid outlet 6 rotation ejections, form the liquid jet of rotation then.Pressed powder required in the coating is delivered to powder channel 3 by the high-pressure delivery device, pressed powder enters powder feeding cap 8 by powder channel 3, and rotation at a high speed in powder feeding cap 8, then, from powder feeding hole 7 ejections, liquid material sprays after the collision of annular nozzle exit immediately all around, at this moment the direction of rotation powder jet vertical with the liquid jet direction of rotation of powder.Liquid material is from liquid outlet 6 rotation ejections, and gas is from air outlet slit 5 ejections, and when the liquid material of ejection was done centrifugal motion, the inertia force that sprays gas at a high speed radially scattered droplet., under the comprehensive function of two kinds of power of above-mentioned ejection gas, open radially reaching axial dispersion through the droplet of nozzle atomization, make droplet in bigger spatial dimension, have more uniform Mass Distribution.From the coupling that outside spray gun, crosses of three strands of jets of nozzle ejection, form eddy current, the air-spray that air outlet slit 5 forms atomizes liquid material fast, and in the setting regions nozzle outside with full and uniform mixing of pressed powder that sprays, together be deposited on by the spraying substrate surface, form coating.

The utility model spray tip can guarantee the solid, liquid two-phase in the collision of moment of jetting nozzle, cross, form uniform sedimentation products, stable and uniform ground deposition is attached to matrix surface.

Claims

1. one kind is used for the spray tip that rifle crosses and sprays outward, it is characterized in that, comprise powder feeding cap (8), be processed with the installing hole (12) and the through hole (13) that communicate in the powder feeding cap (8), be evenly equipped with the powder feeding hole (7) that communicates with through hole (13) of at least two inclinations around the installing hole (12), be processed with the powder channel (3) that communicates with through hole (13) on powder feeding cap (8) sidewall, turbine wheel mixing chamber (4) is installed in the installing hole (12)

Described turbine wheel mixing chamber (4) comprises the turbine shroud (9) of tubular, the inner chamber of turbine shroud (9) is made up of cylindrical cavity and round platform cavity, the big end of this round platform cavity is connected with cylindrical cavity, be symmetrily processed with two fluid passages (2) that communicate with turbine shroud (9) inner chamber on the sidewall of turbine shroud (9), be provided with turbine body (10) in the inner chamber of turbine shroud (9), turbine body (10) is made of cylinder that is connected and Rotary-table, the Rotary-table of turbine body (10) stretches in the round platform chamber of turbine shroud (9), the outer surface of turbine body (10) is processed with disconnected two spirality helical pitch grooves (11) mutually, one end of two helical pitch grooves (11) lays respectively at periphery, and communicate with fluid passage (2) respectively, the other end of helical pitch groove (11) is positioned at turbine body (10) Rotary-table surface, be processed with air outlet slit (5) in the turbine body (10), be processed with the air duct (1) that communicates with air outlet slit (5) on the end face of turbine body (10), the tapering of turbine shroud (9) round platform chamber side surface is greater than the tapering of turbine body (10) Rotary-table side surface, forms the liquid outlet (6) that communicates with two helical pitch grooves (11) between the side surface in turbine shroud (9) round platform chamber and the side surface of turbine body (10) Rotary-table.

2. according to the described nozzle of claim 1, it is characterized in that, described powder feeding hole (7) along the centre of gyration line of powder feeding cap (8), from the end face of powder feeding cap (8) inwardly away from the centre of gyration line of powder feeding cap (8).

3. according to claim 1 or 2 described nozzles, it is characterized in that described powder feeding hole (7) is six.

4. according to the described nozzle of claim 1, it is characterized in that the diameter of described installing hole (12) is less than the diameter of through hole (13).

5. according to the described nozzle of claim 1, it is characterized in that an end of described turbine wheel mixing chamber (4) stretches in the installing hole (12), the end face of the end face of turbine wheel mixing chamber (4) and powder feeding cap (8) is in same plane.