CN219682895U - Nozzle pre-atomization component and nozzle - Google Patents

Abstract

The utility model belongs to the technical field of spraying, and particularly relates to a nozzle pre-atomization component and a nozzle. It solves the defects of unreasonable design in the prior art. The nozzle pre-atomization component comprises a first core block and a second core block which are sequentially sealed and abutted from feeding to spraying, wherein a first taper hole distributed along an X axis and a first compression hole connected with a small-caliber end of the first taper hole are arranged on the first core block, a second taper hole distributed along the X axis and a second compression hole connected with a small-caliber end of the second taper hole are arranged on the second core block, the first taper hole and the second taper hole are communicated and form an expansion chamber with a bore diameter gradually reduced from the middle to two ends, and the bore diameter of the large-caliber end of the first taper hole is larger than that of the large-caliber end of the second taper hole and the middle of the expansion chamber forms a wedge-shaped backflow area. The utility model has the advantages that: atomized spray uniformity.

Description

Nozzle pre-atomization component and nozzle

Technical Field

The utility model belongs to the technical field of spraying, and particularly relates to a nozzle pre-atomization component and a nozzle.

Background

Atomized spraying is achieved by using a nozzle.

The injection hole path of the existing nozzle includes a feed port, an intermediate compression port, and an atomizing injection port. The intermediate compression accelerates the flow rate of the spray to increase the spray pressure. For example, chinese patent discloses an air assisted spray nozzle assembly, patent number CN01111963.2, which includes an air cap to efficiently generate a wide flat jet spray pattern with relatively low air flow and pressure, and to enhance comminution of liquid particles. The air cap has a pair of longitudinally extending air passages on opposite sides of the central liquid flow discharge opening. Each air passage has an exhaust port defined by a downstream transverse deflector flange and a closely spaced, inwardly tapered deflector surface which cooperate to direct and deflect the pressurized air stream inwardly against the exiting liquid stream to atomize the liquid stream into a predetermined spray pattern.

The above scheme, which is assisted by air to further increase the injection pressure, has the advantages as above, but has disadvantages in that: the small middle and large two ends of the middle of the nozzle have poor atomization effect on the spray, so that only an air-assisted high-cost mode can be adopted, and the spray is atomized and sprayed.

Disclosure of Invention

The present utility model has been made in view of the above problems, and an object of the present utility model is to provide a nozzle pre-atomizing member and a nozzle capable of solving the above problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the nozzle pre-atomization component comprises a first core block and a second core block which are sequentially sealed and abutted from feeding to spraying, wherein a first taper hole distributed along an X axis and a first compression hole connected with a small-caliber end of the first taper hole are arranged on the first core block, a second taper hole distributed along the X axis and a second compression hole connected with a small-caliber end of the second taper hole are arranged on the second core block, the first taper hole and the second taper hole are communicated and form an expansion chamber with a bore diameter gradually reduced from the middle part to two ends, and the bore diameter of the large-caliber end of the first taper hole is larger than or smaller than that of the large-caliber end of the second taper hole and forms a backflow area in the middle part of the expansion chamber.

In the nozzle pre-atomization component, the backflow area is a wedge-shaped backflow area, and the second core block is close to one end face of the first core block and a local hole wall of the large-caliber end of the first taper hole to form the wedge-shaped backflow area.

In the nozzle pre-atomization component, the backflow area is a wedge-shaped backflow area, and the wedge-shaped backflow area is formed by one end surface of the first core block, which is close to the second core block, and a local hole wall of the large-caliber end of the second taper hole.

In the nozzle pre-atomization component, the hole wall of the first taper hole and the X axis form a first acute angle, and the hole wall of the second taper hole and the X axis form a second acute angle.

As a first mode, in the nozzle pre-atomization component, a first acute angle formed by the hole wall of the first taper hole and the X axis is larger than a second acute angle formed by the hole wall of the second taper hole and the X axis.

As a second mode, in the nozzle pre-atomization component, a first acute angle formed by the hole wall of the first taper hole and the X axis is equal to a second acute angle formed by the hole wall of the second taper hole and the X axis.

As a third mode, in the nozzle pre-atomization component, a first acute angle formed by the hole wall of the first taper hole and the X axis is smaller than a second acute angle formed by the hole wall of the second taper hole and the X axis.

In the nozzle pre-atomizing member described above, the first compression hole has a smaller pore diameter than the second compression hole.

In the nozzle pre-atomizing member described above, the first compression hole axial hole length is smaller than the axial length of the expansion chamber in the X axis.

In the nozzle pre-atomizing member described above, the axial length of the first compression hole is smaller than the axial length of the second compression hole.

As a first aspect, in the above-mentioned nozzle pre-atomization component, the nozzle pre-atomization component further includes a feeding pellet, feeding holes distributed along the X axis are provided on the feeding pellet, the feeding holes are communicated with the first compression holes, and the aperture of the feeding holes is larger than the aperture of the first compression holes of the nozzle pre-atomization component.

As a second aspect, in the above-described nozzle pre-atomizing member, the nozzle pre-atomizing member further includes a feed pellet on which feed holes distributed along the X-axis are provided, and a pellet mounting hole communicating with the feed holes, the feed hole aperture being smaller than that of the pellet mounting hole, the first pellet and the second pellet being mounted in the pellet mounting hole and the feed hole and the first compression hole being communicated.

In the nozzle pre-atomization component, the first taper hole is any one of a conical hole and a polygonal taper hole.

In the nozzle pre-atomization component, the second taper hole is any one of a conical hole and a polygonal taper hole.

The utility model also provides a nozzle, which comprises the nozzle pre-atomization component.

In the above-mentioned nozzle, the nozzle still includes the nozzle body be equipped with from the feeding to spray direction seal in proper order the nozzle pre-atomization part and the atomizing ejection head that lean on the nozzle body, the atomizing ejection head includes along the atomizing turbulent flow chamber, exit hole and the atomizing mouth that X axle distributes in proper order, the atomizing turbulent flow chamber with the second compression hole intercommunication of nozzle pre-atomization part and the aperture of atomizing turbulent flow chamber is greater than the aperture of second compression hole.

In the above nozzle, the length of the atomizing turbulence chamber in the X-axis is longer than the length of the expansion chamber of the nozzle pre-atomizing member in the X-axis.

In the nozzle, the feeding core block is provided with feeding holes which are distributed along the X axis and are communicated with the first compression holes, and the aperture of each feeding hole is larger than that of the first compression hole of the nozzle pre-atomization component.

In the above nozzle, the nozzle body is provided with mounting through holes distributed along the X axis, and the nozzle pre-atomizing member and the atomizing nozzle head are sequentially mounted in the mounting through holes from the feed direction to the injection direction.

Compared with the prior art, the utility model has the advantages that:

the expansion chamber is fed with a small caliber communicated with the first compression hole, the expansion chamber is discharged with a small caliber communicated with the second compression hole, the injection material compressed from the first compression hole enters the first taper hole of the expansion chamber, and at the moment, the injection area of the injection material is enlarged by at least one time from the injection area of the first compression hole, and the injection material is in a wide-angle injection and atomization state; the atomized spray is guided along with contacting the second conical hole, and at the same time, a part of spray flows back due to the wedge-shaped backflow area, and the spray flows back and contacts the hole wall of the first compression hole and is sprayed out along with the spray sprayed by the first compression hole.

The combination of the first taper hole, the second taper hole and the expansion chamber can realize uniform atomization spraying under the pressure of 1000-1500psi, and the lower pressure can prolong the service life of the spraying nozzle, and meanwhile, the transitional spraying phenomenon of the paint is also solved.

Drawings

Fig. 1 is a schematic view of a nozzle structure provided by the present utility model.

Fig. 2 is a partial schematic structure of fig. 1.

Fig. 3 is a schematic diagram of a first core block structure according to the present utility model.

Fig. 4 is a schematic diagram of a second core block structure according to the present utility model.

Fig. 5 is a schematic view of the structure of a nozzle pre-atomizing unit provided by the utility model.

Fig. 6 is a schematic view of another nozzle pre-atomizing unit according to the present disclosure.

Fig. 7 is a schematic perspective view of an atomization spray head according to the present utility model.

Fig. 8 is a schematic view of another view angle atomizing spray head according to the present utility model.

Fig. 9 is a schematic diagram of the structure of an atomizing spray head according to the present utility model.

Fig. 10 is a state diagram after atomization spraying provided by the utility model.

Fig. 11 is a schematic structural diagram of a second embodiment provided by the present utility model.

Fig. 12 is a schematic view of a third embodiment provided by the present utility model.

Fig. 13 is a schematic view of a fourth embodiment provided by the present utility model.

In the figure, a nozzle pre-atomizing member 1, a first pellet 10, a first taper hole 100, a first compression hole 101, a second pellet 11, a second taper hole 110, a second compression hole 111, a nozzle body 2, a mounting through hole 20, a feed pellet 3, a feed hole 30, a pellet mounting hole 31, an atomizing ejection head 4, an atomizing turbulence chamber 40, an outlet hole 41, an atomizing port 42, an expansion chamber a, a wedge-shaped backflow area, a first acute angle a1, and a second acute angle a2.

Detailed Description

The following are specific embodiments of the utility model and the technical solutions of the utility model will be further described with reference to the accompanying drawings, but the utility model is not limited to these embodiments.

Example 1

As shown in fig. 1 and 2, the present nozzle pre-atomising means comprises a feed pellet 3, a first pellet 10 and a second pellet 11 sealed against each other in sequence from the feed to the spray direction, i.e. the spray enters from the feed pellet 3, the first pellet 10 to the second pellet 11.

Of course, the first core block 10 and the second core block 11 of this embodiment are both circular blocks, so as to facilitate the installation of the installation hole sites, and square blocks may also be used.

From the feeding direction to the spraying direction, the two end faces of the first core block 10 are parallel to each other, one end face of the feeding core block 3 close to the first core block 10 is matched with one end face of the first core block 10 close to the feeding core block 3, the two end faces of the second core block 11 are parallel to each other, and one end face of the first core block 10 close to the second core block 11 is matched with the corresponding end face of the second core block 11 to abut against, so that the hard annular surface contact sealing is realized.

The feed core 3 is provided with feed holes 30 distributed along the X-axis, and the feed holes 30 communicate with the first compression holes 101. Preferably, the aperture of the feed hole 30 is smaller than the aperture of the first compression hole 101.

The diameter of the first core block 10 is equal to the diameter of the second core block 11, the diameters being equal to facilitate installation; the thickness of the first core 10 is smaller than the thickness of the second core 11, and the thicker second core 11 provides a better longer service life.

As shown in fig. 2 to 6, the first core block 10 is provided with first tapered holes 100 distributed along the X-axis and first compressed holes 101 connected to the small-caliber end of the first tapered holes 100, and it is understood that the axis of the first tapered holes 100 coincides with the axis of the first compressed holes 101. The second core block 11 is provided with second tapered holes 110 distributed along the X-axis and second compressed holes 111 connected to the small-caliber end of the second tapered holes 110, and the axis of the second tapered holes 110 coincides with the axis of the second compressed holes 111.

The hole wall of the first taper hole 100 and the X axis form a first acute angle a1, and the hole wall of the second taper hole 110 and the X axis form a second acute angle a2. The first and second tapered holes 100 and 110 are communicated and form an expansion chamber a having a diameter gradually reduced from the middle to both ends, the large-caliber end diameter of the first tapered hole 100 is larger than that of the second tapered hole 110 and a reflux zone A1 is formed in the middle of the expansion chamber a. The reflow region A1 in this embodiment is a wedge-shaped reflow region.

The expansion chamber A is fed with a small caliber communicated with the first compression hole 101, the expansion chamber A is discharged with a small caliber communicated with the second compression hole 111, the injection material compressed from the first compression hole 101 enters the first taper hole 100 of the expansion chamber A, at the moment, the injection area of the injection material is enlarged by at least one time from the injection area of the first compression hole 101, and the injection material is in a wide-angle injection and atomization state; the atomized spray is compressed and accelerated and guided along with contacting the second conical hole 110, meanwhile, a part of the spray flows back due to the wedge-shaped backflow area, the spray flows back and contacts the wall of the first compression hole 101 and is sprayed out along with the spray sprayed by the first compression hole 101, in the process, the wedge-shaped backflow area enables the inside of the expansion chamber A to form a circle (radial 360 DEG) backflow state in the spraying and discharging process, so that the spray is sufficiently and uniformly atomized in the expansion chamber A, atomization uniformity is realized in a low-cost state, the specific spraying effect is shown in fig. 10, and the long side and the short side of the spraying surface of fig. 10 are compared with the middle area surrounded by the long side and the short side, and no obvious heavy black dense area exists.

Next, as shown in fig. 6, a first acute included angle a1 formed by the hole wall of the first taper hole 100 and the X axis is larger than a second acute included angle a2 formed by the hole wall of the second taper hole 110 and the X axis. The combination of the structure and the expansion chamber A can realize uniform atomization spraying under the pressure of 1000-1500psi, and the lower pressure can prolong the service life of the spraying nozzle, and simultaneously solve the transitional spraying phenomenon of the coating.

As shown in FIG. 2, the first compression holes 101 have a diameter of 1/3 to 1/5 of the diameter of the second compression holes 111, for example, the first compression holes 101 have a diameter of 0.4 to 0.8mm. The axial hole length of the first compression hole 101 is smaller than the axial length of the expansion chamber a in the X-axis, and the axial length of the first compression hole 101 is smaller than the axial length of the second compression hole 111. To extend the atomization time in the expansion chamber a to improve the uniformity of atomization.

In the spraying process, the front small and rear large compression holes and the front short and rear long compression holes enter by utilizing the high-speed pressure of the first compression hole, then pre-atomize, and finally discharge to the front-most atomizing spray head 4 after being compressed from the second compression hole.

Preferably, the first taper hole 100 of the present embodiment is any one of a conical hole and a polygonal taper hole. And the second taper hole 110 is any one of a taper hole and a polygonal taper hole.

The axial length of the first taper hole 100 is equal to the axial length of the second taper hole 110; or the axial length of the second tapered bore 110 is longer than the axial length of the first tapered bore 100. The axial length is kept consistent or slightly longer so that the expansion and atomization and the atomization expansion speed are increased.

Example two

As shown in fig. 11, the structure and principle of the present embodiment are substantially the same as those of the first embodiment, except that: the large-caliber end aperture of the first taper hole 100 is smaller than that of the second taper hole 110 and forms a wedge-shaped reflux zone in the middle of the expansion chamber a. At this time, the first acute included angle a1 is smaller than the second acute included angle a2.

Example III

As shown in fig. 12, the structure and principle of the present embodiment are substantially the same as those of the first embodiment, except that: the first acute included angle a1 formed by the hole wall of the first taper hole 100 and the X axis is equal to the second acute included angle a2 formed by the hole wall of the second taper hole 110 and the X axis.

Example IV

The structure and principle of this embodiment are basically the same as those of the first embodiment, and the different structures are as follows:

as shown in fig. 13, the nozzle pre-atomizing member further includes a feed pellet 3, on which feed holes 30 distributed along the X-axis and pellet mounting holes 31 communicating with the feed holes 30 are provided, the feed holes 30 having a smaller aperture than that of the pellet mounting holes 31, and first and second pellets 10 and 11 are mounted in the pellet mounting holes 31 and the feed holes 30 communicate with the first compression holes 101.

Under the action of the above structure, the first pellet 10 and the second pellet 11 at this time are received and fixed in the pellet mounting hole 31 of the feed pellet 3 in advance, so that the three components form a single module, which is finally assembled in a set position to improve efficiency. Meanwhile, the above structure can also ensure concentricity of the first compression hole 101, the first taper hole 100, the second taper hole 110, and the second compression hole to improve spray uniformity.

Next, the end face of the first pellet 10 near the first compression hole 101 is conformed to the hole bottom face of the pellet mounting hole 31, while an end face of the second pellet 11 far from the first pellet 10 and an end orifice of the pellet mounting hole 31 far from the first compression hole 101 are flush. The above structure can make the feeding pellet 3 and the end surface of the second pellet 11 remote from the first compression hole 101 form a common hard contact sealing surface to improve sealability.

That is, the section provided with the pellet mounting hole 31 has a certain wall thickness portion 32, and the wall thickness portion 32 is fitted over the first pellet 10 and the second pellet 11 so that the first pellet 10, the second pellet 11 and the feed pellet 3 are formed as a single body.

Example five

As shown in fig. 1, the present embodiment provides a nozzle including the nozzle pre-atomizing member 1 of any one of the first to fourth embodiments. And the nozzle also comprises a nozzle body 2, the nozzle body 2 is provided with a nozzle pre-atomizing component 1 and an atomizing spray head 4 which are sequentially sealed and abutted from the feeding direction to the spraying direction, as shown in fig. 7-9, the atomizing spray head 4 comprises an atomizing turbulence chamber 40, an outlet hole 41 and an atomizing port 42 which are sequentially distributed along the X axis, the atomizing turbulence chamber 40 is communicated with a second compression hole 111 of the nozzle pre-atomizing component 1, and the aperture of the atomizing turbulence chamber 40 is larger than that of the second compression hole 111. The atomizing port 42 is a tip nozzle type atomizing port, and the injection angle is 40 °.

The aperture gap is designed so that the pre-atomized spray enters the atomizing turbulence chamber 40 and is further atomized and turbulent, so that the final spray is uniform in injection.

The length of the atomizing turbulence chamber 40 in the X-axis is longer than the length of the expansion chamber a of the nozzle pre-atomizing member 1 in the X-axis. To provide a sufficiently turbulent atomization of the pre-atomized spray.

As shown in fig. 2, the feed core 3 is provided with feed holes 30 distributed along the X-axis and communicating with the first compression holes 101, and the aperture of the feed holes 30 is larger than the aperture of the first compression holes 101 of the nozzle pre-atomizing member 1. The above different designs of the apertures of the feed hole 30 and the first compression hole 101 may result in a stronger compression performance of the first compression hole 101 and a longer axial length of the feed hole 30 than the axial length of the first compression hole 101, e.g. the axial length of the feed hole 30 is at least twice the axial length of the first compression hole 101, this difference being present such that the feed hole 30 has sufficient room for turbulence of the feed, e.g. turbulence threads are provided in the wall of the feed hole 30, as shown in fig. 5.

The following are two fixation schemes:

first kind: as shown in fig. 1 and 2, the nozzle body 2 is provided with mounting through holes 20 distributed along the X axis, and the nozzle pre-atomizing member 1 and the atomizing head 4 are mounted in the mounting through holes 20 in this order from the feed direction toward the ejection direction.

The nozzle pre-atomizing member 1 and the atomizing ejection head 4 can be connected with the mounting through hole 20 by an interference fit. That is, the feeding pellet 3, the first pellet 10 and the second pellet 11 of the nozzle pre-atomizing member 1 are fixed with interference fit with the mounting through-hole 20, respectively.

Second kind: as shown in fig. 13, the first pellet 10 and the second pellet 11 are received in the pellet mounting hole 31, and the feed pellet 3 is fixed in the mounting through hole 20 by interference fit.

Example six

The embodiment provides a spray gun and spraying equipment using the spray gun. The spray gun and the spraying equipment are all available commercial products, and the structure of the spray gun and the spraying equipment is not further described in the embodiment.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (10)

1. The nozzle pre-atomization component is characterized by comprising a first core block (10) and a second core block (11) which are sequentially sealed and abutted from feeding to spraying, wherein a first taper hole (100) distributed along an X axis and a first compression hole (101) connected with a small-caliber end of the first taper hole (100) are arranged on the first core block (10), a second taper hole (110) distributed along the X axis and a second compression hole (111) connected with the small-caliber end of the second taper hole (110) are arranged on the second core block (11), the aperture of the first compression hole (101) is smaller than that of the second compression hole (111), the first taper hole (100) and the second taper hole (110) are communicated and form an expansion chamber (A) with the aperture gradually reduced from the middle to the two ends, the aperture of the large-caliber end of the first taper hole (100) is larger than or smaller than that of the large-caliber end of the second taper hole (110) and the aperture of the first taper hole (110) forms a backflow chamber (A) at the middle of the expansion chamber (1).

2. Nozzle pre-atomising component according to claim 1, characterized in that the recirculation zone (A1) is a wedge-shaped recirculation zone, which is formed by the second core (11) near an end face of the first core (10) and a local bore wall of the large bore end of the first cone bore (100).

3. Nozzle pre-atomising component according to claim 1, characterized in that the return area (A1) is a wedge-shaped return area, which is formed by an end face of the first core piece (10) close to the second core piece (11) and a local bore wall of the large bore end of the second cone bore (110).

4. Nozzle pre-atomising component according to claim 1, characterized in that the first compression orifice (101) axial orifice length is smaller than the axial length of the expansion chamber (a) in the X-axis; the axial length of the first compression hole (101) is smaller than the axial length of the second compression hole (111).

5. The nozzle pre-atomizing component according to claim 1, characterized in that the first cone orifice (100) is any one of a cone orifice and a polygonal cone orifice; the second taper hole (110) is any one of a conical hole and a polygonal taper hole.

6. Nozzle pre-atomising component according to claim 1, characterized in that it further comprises a feed pellet (3), on which feed pellet (3) feed holes (30) are provided distributed along the X-axis, the feed holes (30) being in communication with the first compression holes (101).

7. Nozzle pre-atomising part according to claim 1 further comprising a feed pellet (3), feed holes (30) being provided on the feed pellet (3) distributed along the X-axis, and pellet mounting holes (31) communicating with the feed holes (30), the feed holes (30) having a smaller bore diameter than the pellet mounting holes (31), the first pellets (10) and the second pellets (11) being mounted in the pellet mounting holes (31) and the feed holes (30) communicating with the first compression holes (101).

8. Nozzle, characterized in that it comprises a nozzle pre-atomising member (1) according to any of the claims 1-7.

9. Nozzle according to claim 8, characterized in that it further comprises a nozzle body (2), on which nozzle body (2) there are arranged said nozzle pre-atomising member (1) and an atomising ejection head (4) which are sealed against each other in succession from the feed to the ejection direction, said atomising ejection head (4) comprising an atomising turbulence chamber (40), an outlet orifice (41) and an atomising orifice (42) distributed in succession along said X-axis, said atomising turbulence chamber (40) being in communication with a second compression orifice (111) of said nozzle pre-atomising member (1) and the aperture of said atomising turbulence chamber (40) being greater than the aperture of said second compression orifice (111).

10. Nozzle according to claim 9, characterized in that the length of the atomizing turbulence chamber (40) in the X-axis is longer than the length of the expansion chamber (a) of the nozzle pre-atomizing member (1) in the X-axis.