CN107570331B - Liquid dispensing nozzle - Google Patents
Liquid dispensing nozzle Download PDFInfo
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- CN107570331B CN107570331B CN201610509550.5A CN201610509550A CN107570331B CN 107570331 B CN107570331 B CN 107570331B CN 201610509550 A CN201610509550 A CN 201610509550A CN 107570331 B CN107570331 B CN 107570331B
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Abstract
The invention provides a liquid spreading nozzle, which can simply and accurately realize the orientation positioning of a nozzle opening arranged on a spray plate and can uniformly spread liquid such as pesticide, herbicide, breeding water and the like on a target place. The nozzle support is combined with a nozzle support (2), a cover (3), a spray plate (4), an annular sealing component (5), a rectifying core (6), a throttle orifice plate (7) and a union nut (8) for connecting the nozzle support and a liquid guide pipe (10). The jet plate has a bulge (4a) forged on the front surface, a groove (4b) on the inner surface of the bulge, and a jet orifice (4c) for spreading and jetting out the liquid in a planar shape, the flow control core has a communication path (6a), a positioning pin (6b), and an elastically deformable projection (6c) formed on the front surface, the positioning pin is inserted into a pin hole (2e) provided in the nozzle holder, and the projection and the groove are fitted to position the jet plate with respect to the flow control core and the nozzle holder.
Description
Technical Field
The present invention relates to a liquid spray nozzle used by being attached to a spray bar of a spray bar type sprayer, a spray bar of a manual liquid spray device, or the like.
Background
In a general liquid spray nozzle, a nozzle hole having a reduced diameter is provided in a nozzle plate disposed at the tip end, and a liquid such as an agricultural chemical or herbicide is sprayed from the nozzle hole while being atomized and diffused. Such a liquid spray nozzle is described in, for example, fig. 6 of patent document 1 below.
The liquid dispensing nozzle described in patent document 1 is composed of: the nozzle unit includes a nozzle holder attached to a nozzle rod, a cap screwed to a front end of the nozzle holder, a nozzle plate fixed to the front end of the nozzle holder by the cap, a seal member interposed between the nozzle plate and the nozzle holder, and a core disposed inside the nozzle holder (downstream of the nozzle plate).
The central part of the spray plate is provided with a spray opening with a reduced bore. The core is provided with twisted grooves or the like through which the liquid for dispersion passes as a vortex.
Patent document 1: japanese laid-open patent publication No. 5-261318
In the liquid distribution nozzle having the structure shown in patent document 1, when the pressure-feed pressure of the liquid is reduced for the purpose of small-amount distribution, the liquid sprayed from the nozzle hole becomes a film having an unstable shape in which twisting occurs, the particle diameter of the dispersed water is also significantly uneven, and the dispersed state is also unstable.
Here, uniform distribution of the drug or the like to the target site cannot be expected.
In addition, when spraying agricultural chemicals or the like by moving a spray bar, to which a plurality of nozzles are attached at predetermined intervals, in a state of being parallel to a culture medium such as vegetables or fruits, the direction of the spray nozzle is adjusted so that a film of the liquid to be sprayed spreads in the longitudinal direction of the spray bar.
In order to avoid the films of the liquid ejected from the adjacent nozzles from colliding with each other, the direction of the ejection opening is adjusted so that the direction of diffusion of the film of the ejected liquid is slightly (generally, about 10 degrees) shifted from the longitudinal direction of the spray bar.
The adjustment of the direction of the nozzle hole can be performed by a method of appropriately rotating the nozzle plate so that the nozzle hole is directed in a direction to be set in a state where the lid is fastened halfway.
Further, in the use of the nozzle, the direction of the nozzle plate is gently changed by the cap due to vibration or the like, and thus, it is considered that the direction of the adjusted nozzle opening is disturbed.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a liquid spray nozzle that can easily and accurately position the direction of a nozzle opening provided in a nozzle plate, and that can uniformly spray a liquid such as an agricultural chemical, a herbicide, or culture water to a target site.
In order to solve the above problem, in the present invention, the liquid dispensing nozzle is configured as follows.
That is, the liquid distribution nozzle includes: a nozzle holder having a through hole in an axial center portion, a recess at a tip end, an air introduction hole passing from an outer periphery to the through hole in a rear portion, a pin hole in a bottom of the recess, and a rotation stop protrusion engaging with a notch or recess provided in a catheter to be connected in an outer periphery of the rear portion; a cover having an inner flange screwed to the front end of the nozzle holder on the inner periphery of the front end; a spray plate fastened and fixed by the cover; an annular seal member interposed between the nozzle plate and the nozzle holder; a rectifying core disposed at a front end of the nozzle holder; an orifice plate disposed in the through hole at a position rearward of the air inlet hole; and a union nut for connecting the nozzle holder and the liquid guide tube, wherein the nozzle plate includes: a bulging portion forged on the front surface so as to cross the central portion and having a groove on the back surface; and a nozzle which is located at the center of the bulge part and spreads and sprays the liquid in a planar manner, wherein the rectifying core comprises: a communication path connecting the through hole and a space of the recess; a positioning pin provided so as to protrude from the back surface; and an elastically deformable protrusion formed on a front surface thereof, wherein the positioning pin is inserted into the pin hole, and the protrusion is fitted into a groove on a rear surface of the protruding portion of the nozzle plate, thereby positioning the nozzle plate with respect to the rectifying core and the nozzle holder.
Further, the term "spread in a plane" as used herein means that the liquid to be ejected spreads in a fan-like manner along the same plane without being atomized.
Preferred embodiments of the liquid distribution nozzle are described below.
1) The pin holes and the positioning pins inserted into the pin holes are respectively provided in plural numbers, and the plural pin holes and the plural positioning pins are respectively arranged at centrosymmetric positions.
2) The nozzle holder has a projection for engaging the union nut, and the air inlet hole is provided on the tip end side of the nozzle with respect to the projection.
3) The nozzle holder is connected to the liquid guide tube by the union nut, including the case of being locked to the projection and screwed to the liquid guide tube.
4) The nozzle holder has 2 parallel planes (opposed wide planes) on the outer periphery.
The liquid dispensing nozzle of the present invention is configured such that the sealing member temporarily holds the nozzle plate by pressing the nozzle plate against the inner surface of the inner flange of the cap, and the cap is screwed to the tip end of the nozzle holder in this state.
By this operation, the projection 6c enters the groove 4b on the back surface of the protruding portion 4a, and the nozzle holder is simply screwed to the cap temporarily holding the nozzle plate, thereby positioning the direction of the nozzle hole of the nozzle plate. The reason for this will be described in detail later.
Therefore, in the case of the device using the spray bar in which the plurality of liquid spraying nozzles are installed at predetermined intervals, the liquid such as the agricultural chemical can be uniformly sprayed to the target place.
Drawings
Fig. 1 is a side view showing an example of a liquid dispensing nozzle of the present invention.
Fig. 2 is a cross-sectional view of the liquid dispensing nozzle of fig. 1.
Fig. 3 is a top view of the liquid dispensing nozzle of fig. 1.
Fig. 4 is a sectional view taken along line X-X of fig. 2.
Fig. 5 is a sectional view taken along line Y-Y of fig. 2.
Fig. 6 is an exploded perspective view of the liquid dispensing nozzle of fig. 1.
Fig. 7 is a perspective view showing an example of a boom sprayer in which a plurality of liquid distribution nozzles are attached at predetermined intervals.
Fig. 8 is a bottom view showing the mounting position of the liquid dispensing nozzle relative to the spray bar of fig. 7.
Fig. 9 is a perspective view showing an example of a two-way switching nozzle for liquid distribution.
Fig. 10 is a perspective view showing an example of a three-way switching nozzle for liquid distribution.
Description of reference numerals:
1 … liquid dispensing nozzle; 2 … nozzle holder; 2a … through holes; 2b … recess; 2c … core receiver; 2d … air introduction hole; 2e … pin holes; 2f … detent projection; 2g … external threads; a 2h … projection; 2i … 2 parallel planes; 3 … cover; 3a … inner flange; 4 … spray plate; 4a … bulge; 4b … groove; 4c … spout; 5 … annular sealing member; 6 … a rectifying core; 6a … communication path; 6b … locating pins; 6c … projection; 7 … orifice plate; 7a … orifice; 8 … union nut; 10 … catheter; 11 … a cut-out portion; 12 … spray bar; 13 … two-way switching nozzle; 14 … three-way switching nozzle; 15 … nozzle holder; 16 … union nut.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The liquid distribution nozzle 1 shown in fig. 1 to 6 is configured by combining a nozzle holder 2, a cap 3, a nozzle plate 4, an annular seal member 5, a flow control core 6, an orifice plate 7, and a union nut 8 for connecting the nozzle holder 2 and a liquid guide tube 10.
The nozzle holder 2 has a through hole 2a in the axial center portion, a recessed portion 2b and a core receiving portion 2c at the tip, an air introduction hole 2d penetrating from the outer periphery to the through hole 2a at the rear portion, a pin hole 2e at the bottom of the recessed portion 2b, a rotation stopping projection 2f at the outer periphery at the rear portion, and a male screw 2g for screwing the cap 3 at the outer periphery at the tip.
The nozzle holder 2 shown in the example has a protrusion 2h for engaging the union nut 8 on the outer periphery of the rear portion of the main body, and has 2 parallel flat surfaces (opposite-width surfaces) 2i on the outer periphery of the middle portion of the long side of the main body. The flat surface 2i is not essential, but can be used to stop the rotation of the nozzle holder 2 when rotating the cover 3.
The air inlet hole 2d is disposed on the front end side of the nozzle with respect to the projection 2h, and the rotation-stopping projection 2f is disposed on the rear end side of the nozzle with respect to the projection 2 h.
The lid 3 is a lid having an inner flange 3a on the inner periphery on the front end side. The cap 3 is screwed to the front end of the nozzle holder 2 to fasten and fix the nozzle plate 4.
The shower plate 4 has: a bulging portion 4a which is forged at a front surface (outer surface) so as to cross a central portion and which generates an elongated groove 4b at a back surface (inner surface); and a spout 4c located at the center of the bulge 4a and spreading the liquid in a planar manner.
The annular seal member 5 may be a general-purpose O-ring. The annular seal member 5 is interposed between the nozzle plate 4 and the nozzle holder 2, and is compressed by fastening the cap 3 to seal the nozzle plate 4 and the nozzle holder 2 in a liquid-tight manner.
The outer diameter of the annular seal member 5 is slightly larger than the inner diameter of the cap 3 on the distal end side, and the annular seal member 5 can be held by the cap 3 by being pressed against the inner surface of the cap 3 by an elastic restoring force.
The rectifying core 6 rectifies the flow of the liquid flowing forward through the through hole 2a of the nozzle holder 2 by changing the flow direction. The flow control core 6 includes a communication passage 6a connecting the through hole 2a of the nozzle holder 2 and the space of the recess 2b, a positioning pin 6b provided to protrude from the rear surface, and an elastically deformable projection 6c formed on the front surface.
The flow straightening core 6 is disposed at the tip of the main body of the nozzle holder 2 with a part thereof slightly floating from the tip of the nozzle holder 2. In the illustrated structure, the core receiving portions 2c at 2 positions in an arc shape in end view arranged at a centrosymmetric position are slightly protruded from the front end of the main body portion of the nozzle holder 2, and the rectifying core 6 is supported by the core receiving portions 2 c.
Therefore, the non-support portion of the rectifying core 6 by the core receiving portion 2c floats from the front end of the main body portion of the nozzle holder 2 by an amount corresponding to the amount of protrusion of the core receiving portion 2c, and the rectifying core 6 can be easily removed from the nozzle holder 2 at the time of maintenance by a gap generated between the non-support portion and the front end of the main body portion of the nozzle holder 2.
The rectifying core 6 can be held at a position floating from the tip of the main body of the nozzle holder 2 by setting the depth of the pin hole 2e and the length of the positioning pin 6b so that the positioning pin 6b abuts the bottom of the pin hole 2e before the rectifying core 6 abuts the tip of the main body of the nozzle holder.
It is only preferable that the straightening core 6 is held at a position floating from the tip of the main body of the nozzle holder 2 on the maintenance surface. Therefore, it is a matter of course that the core receiving portion 2c does not exist and the depth of the pin hole 2e is larger than the length of the positioning pin 6 b.
The orifice plate 7 is disposed in the through hole 2a at a position rearward of the air introduction hole 2 d. The orifice plate 7 increases the flow rate of the supplied liquid by passing the liquid through a central orifice 7 a.
The liquid whose flow rate is increased by passing through the orifice 7a sucks air from the air introduction hole 2d, and the mixed fluid mixed with the air is pressurized by the ejector effect and reaches the rectifying core 6. By this ejector effect, the ejection of the liquid from the ejection port 4c is stabilized, the particle diameter of the diffused water is made uniform, and the diffusion state is also improved.
The union nut 8 is a nut having a structure similar to that of the cover 3, and the union nut 8 is engaged with the projection 2h, and in this state, the union nut 8 is screwed to the catheter 10. Thereby, the nozzle holder 2 is fastened and coupled to the catheter 10.
The illustrated catheter 10 is a branch pipe provided on the spray bar, a branch pipe provided on the tip of the liquid spreading bar, on the outer periphery near the tip, or the like. A notch 11 (or a recess) is provided at the tip end of the catheter 10, and the rotation stop protrusion 2f on the rear outer periphery of the nozzle holder 2 is fitted into the notch 11 (or the recess).
The position of the nozzle holder 2 where the rotation stop projection 2f is provided is sized to fit in close contact with the hole of the catheter 10, and the structure is such that the connection between the nozzle holder 2 and the catheter 10 is sealed in a liquid-tight manner without using a sealing member.
In the exemplary liquid dispensing nozzle, the nozzle holder 2 is formed of polypropylene (PP), the cap 3, the rectifying core 6, and the union nut 8 are formed of polyoxymethylene resin (POM), the orifice plate 4 and the orifice plate 7 are formed of stainless steel, and the annular seal member 5 is formed of nitrile rubber (NBR).
The material of the nozzle holder 2 is not limited to polypropylene. The materials of the cover 3, the rectifying core 6, and the union nut 8 are not limited to polyoxymethylene resin. They may be formed of a material resistant to the liquid to be dispensed. When the liquid to be dispersed is, for example, an agricultural chemical, the material having tolerance may be a polyamide resin (PA), a fluorine-based resin, or the like, in addition to the polypropylene and the polyoxymethylene resin, and may be formed of these resins.
The material of the annular seal member 5 is not limited to nitrile rubber.
The exemplary liquid distribution nozzle 1 configured as described above has the flow straightening core 6 attached to the nozzle holder 2 by inserting the positioning pin 6b into the pin hole 2 e.
The nozzle plate 4 and the annular seal member 5 are placed inside the lid 3, and the nozzle plate 4 is temporarily held by pressing the annular seal member 5 held by the lid 3 against the inner flange 3a of the lid 3.
In this state, the cap 3 is screwed to the outer periphery of the tip end of the nozzle holder 2. At the beginning of this screwing, the shower plate 4 rotates together with the lid 3 following the movement of the lid 3.
When the cover 3 is rotated to the vicinity of the fastening end point, the protrusion 6c provided on the front surface of the rectifying core 6 is pressed against the back surface of the nozzle plate 4, is slightly elastically deformed, and falls into the groove 4b on the back surface of the bulge 4 a. Then, the projection 6c is elastically restored.
Therefore, the projection 6c is hooked on the edge of the groove 4b and cannot follow the subsequent rotation of the cover 3. As a result, only the cap 3 is rotated thereafter, and the attachment of the cap 3 to the nozzle holder 2 and the fixation of the nozzle plate 4 by the cap 3 are completed.
In this fixed state, the projection 6c provided on the rectifying core 6 is fitted in the groove 4b on the back surface of the expanded portion of the nozzle plate 4, and thus the nozzle plate 4 is positioned with respect to the rectifying core 6.
Further, since the positioning pin 6b on the back surface is inserted into the pin hole 2e provided in the nozzle holder 2, the rectifying core 6 is positioned with respect to the nozzle holder 2, and the nozzle holder 2 is positioned with respect to the liquid guide 10 attached to the spray bar or the scatter bar by engaging the rotation-stopping protrusion 2f with the notch 11 or the recess provided in the liquid guide 10 to be connected to the nozzle.
Thereby, the positioning of the orientation of the nozzle 4c of the nozzle plate 4 can be simply and reliably achieved. Therefore, as shown in fig. 7 and 8, even in a boom sprayer or the like used with a plurality of liquid spray nozzles 1 attached to the boom 12 at predetermined intervals, liquid such as agricultural chemicals can be uniformly sprayed to a target site. In fig. 8, the dispersion liquid spreads in a direction with a single-dot chain line added.
Fig. 9 and 10 show an example of a product in which a plurality of liquid distribution nozzles are provided at 1 position, and the positions of the plurality of nozzles are changed so that the spray patterns at the same spray point are changed.
Fig. 9 shows a stem sprayer in which a two-way switching nozzle 13 is attached to a branch pipe (a liquid guide pipe 10) of a stem 12, and fig. 10 shows a stem sprayer in which a three-way switching nozzle 14 is attached to a branch pipe (a liquid guide pipe 10) of a stem 12.
The two-way switching nozzle 13 of fig. 9 has 2 liquid distribution nozzles 1 having different ejection patterns at positions rotated by 180 ° on the outer periphery of the nozzle holder 15. In addition, the three-way switching nozzle 14 of fig. 10 has three liquid distribution nozzles 1 different in ejection pattern at positions spaced apart at 120 ° intervals on the outer periphery of the nozzle holder 15.
The nozzle holder 15 is coupled to the catheter 10 by a union nut 16 and is rotatable about the tip of the catheter 10 inserted into the nozzle holder 2.
By the rotation of the nozzle holder 15, the two-way switching nozzle 13 in fig. 9 sequentially changes the positions of 2 liquid distribution nozzles 1, and the three-way switching nozzle 14 in fig. 10 sequentially changes the positions of three liquid distribution nozzles 1.
In the case of the illustrated boom sprayer, the liquid guide tube 10 inserted into the nozzle holder 15 is provided with a hole (not shown) for communicating the internal passage with only the nozzle facing downward, and the position of the nozzle of a different type is changed by rotating the nozzle holder 15 to switch the spray pattern.
In the two-way switching nozzle 13 and the three-way switching nozzle 14, the nozzle opening is often required to be positioned for at least one of 2 or 3 liquid distribution nozzles. The liquid distribution nozzle having the structure described in fig. 1 to 6 can meet this demand.
Claims (3)
1. A liquid dispensing nozzle in which, in a liquid dispensing nozzle,
the disclosed device is provided with:
a nozzle holder (2) having a through hole (2a) in an axial center portion, a recess (2b) in a tip end, an air introduction hole (2d) in a rear portion that passes from an outer periphery to the through hole (2a), a pin hole (2e) in a bottom of the recess (2b), and a rotation stop protrusion (2f) in a rear portion outer periphery that engages with a notch (11) or a recess provided in a catheter (10) to be connected;
a cover (3) having an inner flange (3a) screwed to the front end of the nozzle holder on the inner periphery of the front end;
a nozzle plate (4) fastened and fixed by the cover (3);
an annular seal member (5) interposed between the nozzle plate and the nozzle holder (2);
a flow straightening core (6) disposed at the front end of the nozzle holder (2);
an orifice plate (7) disposed in the through-hole (2a) at a position rearward of the air introduction hole (2 d); and
a union nut (8) that connects the nozzle holder (2) and the catheter (10),
the nozzle plate (4) has: a bulging portion (4a) which is forged on the front surface so as to cross the central portion and which generates a groove (4b) on the back surface; and a nozzle (4c) located at the center of the bulge (4a) for spreading and ejecting the liquid in a planar manner,
the rectifying core (6) has: a communication path (6a) that connects the through hole (2a) and the space of the recess (2 b); a positioning pin (6b) provided so as to protrude from the rear surface; and an elastically deformable protrusion (6c) formed on the front surface,
the positioning pin (6b) is inserted into the pin hole (2e), and the projection (6c) is fitted into a groove (4b) on the back surface of the bulging portion (4a) of the nozzle plate (4), thereby positioning the nozzle plate (4) with respect to the flow straightening core (6) and the nozzle holder (2).
2. The liquid dispensing nozzle of claim 1,
the pin holes (2e) and the positioning pins (6b) inserted into the pin holes (2e) are respectively provided in plural numbers, and the plural pin holes (2e) and the plural positioning pins (6b) are respectively arranged at centrosymmetric positions.
3. The liquid dispensing nozzle of claim 1 or 2,
the nozzle holder (2) has a projection (2h) for engaging the union nut (8) at a position forward of the rotation stop projection (2f), and the air inlet hole (2d) is provided at a position closer to the tip end side of the nozzle than the projection (2 h).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610509550.5A CN107570331B (en) | 2016-06-30 | 2016-06-30 | Liquid dispensing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610509550.5A CN107570331B (en) | 2016-06-30 | 2016-06-30 | Liquid dispensing nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107570331A CN107570331A (en) | 2018-01-12 |
| CN107570331B true CN107570331B (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610509550.5A Active CN107570331B (en) | 2016-06-30 | 2016-06-30 | Liquid dispensing nozzle |
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| CN (1) | CN107570331B (en) |
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| CN102179329A (en) * | 2011-04-29 | 2011-09-14 | 华东理工大学 | Jet nozzle for condensing and devolatilizing synthetic rubber |
| CN105569625A (en) * | 2014-11-10 | 2016-05-11 | 中国石油化工股份有限公司 | Underground steam flow dryness distribution and regulation device |
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| CN107570331A (en) | 2018-01-12 |
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