CN205761904U - Spray gun head and spray gun - Google Patents

Abstract

The utility model provides a spray gun head and spray gun. The spray gun head comprises a body, wherein a main flow channel and a plurality of auxiliary flow channels distributed along the circumferential direction of the main flow channel are formed on the body. The utility model discloses a plurality of auxiliary flow ways that the accessible set up around the sprue produce some little efflux around the sprue to disturb, restrain the vortex that the high-speed sprue air current produced, with the distribution form of destroying the air current vortex that produces by high-speed efflux, therefore improved near the flow field structure of spray gun export, reduced the spray gun noise.

Description

Lance head and spray gun

Technical field

This utility model relates to spray gun field, particularly to a kind of lance head and spray gun.

Background technology

The mode of automobile washing is a lot, cuts both ways；But steam clean is the cleaning most beneficial for the protection of Automobile paint Mode, is the cleaning way that purposes is the widest, is also the cleaning way most beneficial for environmental conservation.

Steam clean is flexible cleaning, utilizes steam heat degradation principles, will be attached to car surface with soft steam Dirt combines, softens, expands, separates, then with clean rag by remaining dirt and fraction of water stain removal；Steam clean helps In protection, the cleaning in gap of lacquer painting, and water content does not the most damage circuit, it is possible to effectively clean automobile engine, instrumental panel, The positions such as air louver；While rushing with steam, drying, a flow process just can clean automobile smoothly, operates simpler, fast Prompt.

Use high steam to carry out carwash and can be greatly saved water consumption.But, during the work of car washer spray gun, steam jet is non- Chang Gao, generally reaches hundreds of meters per second.After high temperature, high velocity vapor are entered atmospheric environment by spray gun jet, cause near shower nozzle Air-flow turbulent fluctuation is violent, and eddy current not only quantity is many, and vorticity is big, thus produces aerodynamic noise, and noise with the form of quadrapole There is higher broadband noise (4kHz～16kHz) numerical value in frequency spectrum HFS, and then causes noise total value the highest.

Utility model content

This utility model provides a kind of lance head and spray gun, the problem big to solve spray gun noise of the prior art.

For solving the problems referred to above, as an aspect of the present utility model, it is provided that a kind of lance head, including body, institute State and on body, be formed with sprue and the circumferentially distributed multiple auxiliary flows along described sprue.

Preferably, the cross section of described auxiliary flow is circular, and the radius of described auxiliary flow is less than or equal to 0.5 milli Rice.

Preferably, the inside radius of the radius of described auxiliary flow and described sprue meet following relation: Ra=(0.1～ 0.3) Rb, wherein, Ra is the radius of auxiliary flow, and Rb is the inside radius after sprue shrinks.

Preferably, the radius of described auxiliary flow meets following relation: Ra=0.16Rb with the inside radius of described sprue, Wherein, Ra is the radius of auxiliary flow, and Rb is the inside radius after sprue shrinks.

Preferably, the distance at the center of described auxiliary flow and described sprue center meets following relation:

Rc=1.25Rd～0.85Re, wherein, distance described in Rc；Rd is the pipe external diameter in lance head exit；Re is main flow The perisystolic inside radius in road.

Preferably, the span of the pipe external diameter in described lance head exit is: Rd=(1.4～1.6) Rb.

Preferably, the value of the pipe external diameter in described lance head exit is Rd=1.42Rb.

Preferably, the number of described auxiliary flow is:

$N=INT\left(\frac{2\×\mathrm{\π}\×Rc}{l}\right)$

Wherein, INT is round numbers；The span of l is (1～2) Rb.

Preferably, the value of described l be 1.48Rb, N be 8.

Preferably, the cross section of described auxiliary flow is the first shape, and described first shape is by the first circular arc, the first connection Line, the second circular arc and the second connecting line head and the tail successively are formed by connecting, and described first circular arc has identical with described second circular arc The center of circle.

Preferably, described first connecting line and described second connecting line are circular arc.

Preferably, the radius of described first connecting line and described second connecting line meet following relation: Rf=(0.025～ 0.075) Rb, wherein, Rf is described first connecting line or the radius of described second connecting line；Rb is interior half after sprue shrinks Footpath.

Preferably, the radius of described first connecting line and described second connecting line is Rf=0.053Rb.

Preferably, the center of described auxiliary flow meets following relation: Rc=1.1Rd with the distance at described sprue center ～0.95Re, wherein, distance described in Rc；Rd is the pipe external diameter in lance head exit；Re is the perisystolic inside radius of sprue.

Preferably, the number of described auxiliary flow is:

$N=INT\left(\frac{2\×\mathrm{\π}\×Rc}{2L}\right)$

Wherein, INT is round numbers；L is between described first connecting line and described second connecting line and described Maximum arc length in the one concentric series of circular arc of circular arc.

Preferably, the value of described L be 1.59Rb, N be 4.

This utility model additionally provides a kind of spray gun, it is characterised in that include above-mentioned lance head.

This utility model can by the multiple auxiliary flows being arranged around at sprue, around sprue generation some Little jet, thus disturb, contain the eddy current that high speed main flow air-flow produces, with destroy the air-flow whirlpool that produced by high-speed jet point Cloth form, thus improve the flow field structure near lance outlet, reduce spray gun noise.

Accompanying drawing explanation

Fig. 1 schematically shows the structural representation of the spray gun in this utility model；

Fig. 2 schematically shows the I portion cutaway view Amplified image of the lance head in this utility model；

Fig. 3 schematically shows the front view of the lance head of an embodiment in this utility model；

Fig. 4 schematically shows the front view of the lance head of another embodiment in this utility model；

Fig. 5 schematically shows flow field schematic diagram when being not provided with auxiliary flow；

Fig. 6 schematically shows the flow field schematic diagram during auxiliary flow being provided with in this utility model.

Reference in figure: 1, body；2, sprue；3, auxiliary flow；4, hand-held handle；5, Switch of spray pistol；6, spray gun Inlet tube；7, lance outlet pipe；8, spray gun rifle head.

Detailed description of the invention

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but this utility model can be by right Require that the multitude of different ways limiting and covering is implemented.

Refer to Fig. 1 to Fig. 6, this utility model provides a kind of lance head, and it is particularly well-suited in the spray gun of car washer. In Fig. 2 to the embodiment shown in 6, this lance head includes body 1, wherein, has been internally formed a main flow at described body 1 Road 2, unlike the prior art, the circumference at this sprue 2 is also distributed multiple auxiliary flow 3, especially, these auxiliary Runner 3 is evenly distributed on sprue 2 around, to reach more preferable noise reduction.Wherein, the Rg in Fig. 3 and Fig. 4 is sprue External diameter, in Fig. 2, arrow A represents that air-flow carrys out flow path direction.

As in figure 2 it is shown, sprue 2 is starting to narrow near its internal diameter of exit, thus form a tapered Step-edge Junction Structure.Sprue 2 runs through this ledge structure along injection direction, and auxiliary flow 3 then can only be formed at this ledge structure, is i.e. formed In the circular step shunk in this sprue and cause, and these auxiliary flows 3 also extend through the circular step of ledge structure, one end Connecting with the most perisystolic sprue, the other end connects with the outside of the outlet of lance head, in order to outwards spray.At one preferably Embodiment in, the axis of sprue 2 and auxiliary flow 3 is parallel to each other.

Fig. 5 is flow field schematic diagram when being not provided with auxiliary flow of the prior art, and Fig. 6 is for being provided with in this utility model Auxiliary flow time flow field schematic diagram.Comparison diagram 5 and Fig. 6 understands, and this utility model can be by being arranged around at sprue 2 Multiple auxiliary flows 3, produce some little jets around sprue, thus disturb, contain what high speed main flow air-flow produced Eddy current, to destroy the distributional pattern in the air-flow whirlpool produced by high-speed jet, thus improves the flow field structure near lance outlet, Reduce spray gun noise.

In the embodiment shown in fig. 3, the cross section of auxiliary flow 3 can be circular, and the radius of described auxiliary flow 3 is little In or equal to 0.5 millimeter.Compared with other cross sectional shapes, the auxiliary flow of circular cross-section, can preferably reach noise reduction.

Such as Fig. 3, there is relationship below between radius and the inside radius of described sprue 2 of auxiliary flow 3, i.e. Ra= (0.1～0.3) Rb, wherein, Ra is the radius of auxiliary flow, and Rb is the inside radius after sprue shrinks.It is highly preferred that Ra= 0.16Rb.In the case of meeting above-mentioned relation formula, noise reduction can be improved further.

Such as Fig. 3, the center of auxiliary flow 3 meets with distance Rc at sprue 2 center: Rc=1.25Rd～0.85Re, its Middle Rd is the pipe external diameter in lance head exit；Re is the perisystolic inside radius of sprue.

Such as Fig. 3, the span of the pipe external diameter in described lance head exit is: Rd=(1.4～1.6) Rb, more preferably Rd=1.42Rb.

Such as Fig. 3, the number of described auxiliary flow can use following formula to determine:

$N=INT\left(\frac{2\×\mathrm{\π}\×Rc}{l}\right)$

Wherein, INT is round numbers；The span of l is (1～2) Rb.Such as, the value of described l is more preferably 1.48Rb, N are 8.

In the embodiment shown in fig. 4, described auxiliary flow 3 can use narrow, elongated flat hole, such as this flat Hole can be formed by connecting by the first circular arc, the first connecting line, the second circular arc and the second connecting line successively head and the tail, and described first circular arc With described second circular arc, there is the identical center of circle.The auxiliary flow of this structure, equally suppression main flow air-flow is used to produce Eddy current, reduce the effect of noise.Wherein, the first connecting line and the second connecting line can use straight line, the most more push away Recommend be the first connecting line and the second connecting line is circular arc, i.e. the two ends in this flat hole are carried out corners process.

Such as Fig. 4, the radius of the first connecting line and described second connecting line meets following relation: Rf=(0.025～0.075) Rb, more preferably Rf=0.053Rb, wherein, Rf is described first connecting line or the radius of described second connecting line；Rb is main flow Inside radius after road contraction.Use this structure, can more efficiently reduce noise in the case of flat hole.

Such as Fig. 4, the center of described auxiliary flow 3 meets following relation: Rc=with distance Rc at described sprue 2 center 1.1Rd～0.95Re, wherein, Rd is the pipe external diameter in lance head exit；Re is the perisystolic inside radius of sprue.

Such as Fig. 4, when auxiliary flow uses flat hole, its number can be determined by following formula:

$N=INT\left(\frac{2\×\mathrm{\π}\×Rc}{2L}\right)$

Wherein, INT is round numbers；L is the arc length of the auxiliary flow two-end-point being perpendicular to main flow direction, it is also possible to be expressed as In between described first connecting line and described second connecting line and the described first concentric series of circular arc of circular arc Big arc length.Such as, the value of described L is more preferably 1.59Rb, N is 4.

This utility model additionally provides a kind of spray gun, and it includes above-mentioned lance head.Refer to Fig. 1, this spray gun can include Several parts compositions such as hand-held handle 4, Switch of spray pistol 5, spray gun inlet tube 6, lance outlet pipe 7 and spray gun rifle head 8.Wherein, high Temperature, gases at high pressure are produced by boiler and by spray gun inlet tube, lance outlet pipe, are finally flowed out by lance head high velocity jet. When the lance head being provided without in this patent, as it is shown in figure 5, will go out at spray gun owing to high velocity air is injected into atmospheric environment Mouth produces the eddy current of vorticity a large amount of, big, thus produces noise.When have employed the lance head in this patent, during its auxiliary flow Flow field schematic diagram as shown in Figure 6, the flow field structure near lance outlet has obtained improving well, thus reduces spray gun and make an uproar Sound.

Noise measuring result in an experimental example is as shown in the table:

Use the technical scheme in this patent, can be about 3dB by the lower noise of lance outlet, considerably increase product Competitiveness.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this For the technical staff in field, this utility model can have various modifications and variations.All in spirit of the present utility model and principle Within, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (17)

1. a lance head, it is characterised in that include body (1), described body (1) is formed with sprue (2) and along described Circumferentially distributed multiple auxiliary flows (3) of sprue (2).

Lance head the most according to claim 1, it is characterised in that the cross section of described auxiliary flow (3) is circular and described The radius of auxiliary flow (3) is less than or equal to 0.5 millimeter.

Lance head the most according to claim 2, it is characterised in that the radius of described auxiliary flow (3) and described sprue (2) inside radius meets following relation:

Ra=(0.1～0.3) Rb

Wherein, Ra is the radius of auxiliary flow, and Rb is the inside radius after sprue shrinks.

Lance head the most according to claim 2, it is characterised in that the radius of described auxiliary flow (3) and described sprue (2) inside radius meets following relation:

Ra=0.16Rb

Wherein, Ra is the radius of auxiliary flow, and Rb is the inside radius after sprue shrinks.

Lance head the most according to claim 3, it is characterised in that the center of described auxiliary flow (3) and described sprue (2) distance at center meets following relation:

Rc=1.25Rd～0.85Re

Wherein, distance described in Rc；Rd is the pipe external diameter in lance head exit；Re is the perisystolic inside radius of sprue.

Lance head the most according to claim 5, it is characterised in that the span of the pipe external diameter in described lance head exit It is:

Rd=(1.4～1.6) Rb.

Lance head the most according to claim 5, it is characterised in that the value of the pipe external diameter in described lance head exit is Rd =1.42Rb.

Lance head the most according to claim 5, it is characterised in that the number of described auxiliary flow is:

$N=INT\left(\frac{2\×\mathrm{\π}\×Rc}{l}\right)$

Wherein, INT is round numbers；The span of l is (1～2) Rb.

Lance head the most according to claim 8, it is characterised in that the value of described l be 1.48Rb, N be 8.

Lance head the most according to claim 1, it is characterised in that the cross section of described auxiliary flow (3) is the first shape, Described first shape is formed by connecting by the first circular arc, the first connecting line, the second circular arc and the second connecting line successively head and the tail, and described First circular arc and described second circular arc have the identical center of circle.

11. lance heads according to claim 10, it is characterised in that described first connecting line and described second connecting line are equal For circular arc.

12. lance heads according to claim 11, it is characterised in that described first connecting line and described second connecting line Radius meets following relation:

Rf=(0.025～0.075) Rb

Wherein, Rf is described first connecting line or the radius of described second connecting line；Rb is the inside radius after sprue shrinks.

13. lance heads according to claim 12, it is characterised in that described first connecting line and described second connecting line Radius is Rf=0.053Rb.

14. lance heads according to claim 10, it is characterised in that the center of described auxiliary flow (3) and described main flow The distance at road (2) center meets following relation:

Rc=1.1Rd～0.95Re

Wherein, Rc is described distance；Rd is the pipe external diameter in lance head exit；Re is the perisystolic inside radius of sprue.

15. lance heads according to claim 14, it is characterised in that the number of described auxiliary flow is:

$N=INT\left(\frac{2\×\mathrm{\π}\×Rc}{2L}\right)$

Wherein, INT is round numbers；L is between described first connecting line and described second connecting line and described first circle Maximum arc length in the concentric series of circular arc of arc.

16. lance heads according to claim 15, it is characterised in that the value of described L be 1.59Rb, N be 4.

17. 1 kinds of spray guns, it is characterised in that include the lance head according to any one of claim 1 to 16.