JPS59109267A - Circulating sprinkling head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a circulation system for spraying and atomizing a liquid on a desired surface, in particular for spraying a plant protection agent onto the ground and/or on a plant cultivation area. This relates to the spray head.

The dispersing head comprises a casing suitable for connection of a supply pipe for the liquid to be sprayed, a central bore for guiding the liquid into the casing, and a vortex chamber communicating with the central bore, the vortex chamber being located on the side opposite the central bore. is equipped with replaceable spreading platelets. The liquid flows through the vortex chamber in a spiral motion about an axis coaxial with the longitudinal axis of the casing and leaves the system via the distribution plate. The dispersion platelet is formed by a dispersion opening which is used to drain the liquid along the conical surface. This dispersion opening advantageously occupies a position coaxial with the longitudinal axis of the vortex chamber and is connected to the casing by a threaded locking cap.

In agricultural fields, particularly in large-scale agricultural fields, the plant protection agents and other chemicals used are applied to the ground or to the plant cultivation using relatively low- or high-efficiency spray equipment. The jetting device has a sparging head suitable for jetting the liquid, through which the liquid under overpressure can flow out.

The overflow imparts kinetic energy to the ejected droplets that determines the area of application when multiple ejectors are used. Also,
Ejection devices are also known in which ejected droplets are delivered by means of an air movement created by a blower.

The dispersion heads of conventional jetting devices do not provide uniform jetting. Modern constructions have been considered from the point of view of operating on the so-called circulation principle and are perhaps more convenient. That is, a so-called vortex chamber is installed inside the dispensing head which forces the liquid to swirl, so that the liquid leaves the system through relatively narrow perforations.

After leaving the perforations, the ejected droplets come into contact with air particles. That is, droplets with various diameters are formed as extremely complex hydrodynamic phenomena occur and progress. Due to the presence of the vortex chamber and due to the closed borehole, the jet liquid leaves the spreading head along a spherical surface.

Considering that the same sprayer is used for spraying in different plant areas and with different chemicals, it is desirable to be able to vary the spraying area and cone angle. By the way, this modification is also necessary in the case of plants of the same species, but at different stages of development. In general, shoots must be sprayed with great care to avoid damage by high-energy droplets.

Inside the spreading head, ie in the vortex chamber, a vortex is created by so-called swirling profiles.

This swirling profile body has spiral ribs or places! j
It has a recess with a - cross section and a predetermined pitch, which pitch determines the parameters of the vortex.

Spreading heads have already been produced with exchangeable pivoting profiles so that they can be adapted to the plant cultivation area and the material to be spread.

In these solutions, the surface of the swirling profile body is constituted by spiral tracks with different cross-sections and various pitches. One of the disadvantages is that each outlet opening or each distribution platelet must be associated with a large number of pivoting profiles. The situation is further complicated by the fact that, for different plant areas, the time unit-related application efficiency usually has to be adjusted accordingly, and thus the perforation dimensions of the spreading plate also have to be varied. Become. Therefore, a large number of swirling profile bodies and a large number of spreading platelets must be produced for each injection device.

In the last 20 years, in order to eliminate the existing drawbacks, such spreading heads have been developed that allow a stepless adjustment of the ejection parameters. This method of operation is made possible by guiding only a portion of the liquid to be injected, (1) also a quantitatively variable portion, into a helical orbit. The remaining liquid is not redirected in any way,
In some cases, it reaches the vortex chamber while being forced into a slightly minimal circular motion. The image part of the liquid flow is j inside the vortex chamber.
meet and remove the perforation valve from the system.

By this method, the relative volume ratio between the two liquid temperatures can be adjusted, thereby controlling the degree of vortexing,
It is therefore possible to control the relative inverse proportion value of the spraying action range or cone angle.

In the above-mentioned spreading head, the pivoting profile body has a thread 1.1. formed on the surface. l, the threaded conical surface being fitted with a tapered cap having the same opening angle. By continuously adjusting the relative position of the swirling profile and the conical cap, the vorticity can be controlled, thereby making it possible to control the jet dispersion parameters.

In other known spreading heads, the spiral trajectory creating the swirl is formed along the inner surface of a tubular swirl profile. A tapered mandrel, adjustable by means of a thread, projects inside the swirling profile body, and by changing the position of this mandrel, the space available for swirling the liquid can be reduced or enlarged.

If the inner cylindrical bore is completely closed, the liquid will have maximum swirl and will be forced to flow through its entirety in a helical trajectory. In the completely opposite extreme case, ie if no throttling of the internal parts takes place, the liquid reaches the perforations of the distribution platelet, actually bypassing the helical trajectory completely. Of course, in the latter case,
The cone angle is minimum, while the working area is maximum.

The biggest drawback of the above-mentioned spreading head is that the spreading efficiency itself changes as the cone angle changes. Therefore, the adjustment of the continuous metering of liquid, which is related to unit time or unit area, must be time-consuming and complicated.

Therefore, the first thing to do is to evaluate and determine the amount of liquid to be sprayed at one time. For accurate dosing, special measuring devices may be required, but such measuring devices complicate the spraying equipment and also increase its cost.

In the above-mentioned known spreading head, before the cylinder used for the restriction, the liquid is forced to traverse a space in the nature of an annular ring, where it undergoes excessive deflection, which is extremely It's inconvenient. As a result, impurities or suspensions in the ejected liquid settle in this space.
This will sooner or later cause the spreading head to close Z1.7.

The object of the invention is to make it possible to eliminate the disadvantages of the known solutions, namely by changing the spray range and the spray cone angle easily by changing a few mechanical elements, and to The objective is to develop a circulating spray head that allows for dispersion.

The object of the invention is to provide the possibility of a precise positioning of the liquid, which is related to the rise time and the unit area, while preventing the deposition of sediments and suspensions present in the ejected liquid, and 1) Developing a spreading head that prevents clogging of the fabric head.

The idea of the invention is based on the recognition that the range of action of the dispersion and the dispersion cone angle inversely proportional to it are, contrary to the conventional idea, and is based on the recognition that it is not only dependent on the pitch, but can also be advantageously influenced by the dimensions, in particular by the axial length of the vortex chamber.

In fact, by changing the length of the vortex chamber, this change can then be realized quite simply, but the direction of the liquid flow changes only to a small extent, so that the risk of blockage is foreseen. Similarly, it was found that the size of the liquid layer hardly responds to changes in the length of the vortex chamber, and not only does the swirl created by the swirling profile change with the length of the vortex chamber. It was found that the effect was negligible.

Corresponding to said object, the present invention provides a method for spraying and spraying a liquid under pressure in the form of a jet liquid onto any surface, in particular for spraying a plant protection agent onto the ground and/or into a plant cultivation area. The invention relates to a circulating spreading head. The dispensing head according to the invention comprises a casing suitable for connecting a supply pipe of the liquid to be jetted, a central bore for guiding the liquid into the casing, and a swirl chamber communicating with the central bore. The vortex chamber is equipped with a replaceable sparging plate on the side opposite the central bore. The liquid flows through the vortex chamber by means of a spiral movement about an axis coaxial with the longitudinal axis of the casing and passes through the system via the distribution plates. The dispersion platelet is formed by a dispersion opening which is used to drain the liquid along the conical surface. This dispersion opening is advantageously positioned coaxially with the longitudinal axis of the vortex chamber and is fixed to the casing by means of a threaded J-lock cap. moreover,
The dispersion head is formed in such a way that a swirling profile body is attached to the casing, which includes a swirl chamber and, in a manner known per se, imparts a helical movement on the liquid flowing through the casing by means of a tight thread. It is formed so that it is inserted into the inside. A replaceable insert is inserted into the vortex chamber arranged inside the swirling profile body, by means of which the axial length of the vortex chamber from the central bore of the casing is determined or adjusted. It is possible to do so.

Another feature of the spreading head according to the invention is that each insert member comprises:
having a club-shaped head projecting into the vortex chamber and a body portion extending rearward in the direction of the central bore and connecting with the head;
At least three guide ribs are provided that protrude from the body portion and vertically divide the interior space of the casing.

The head of the insert used for adjustment has a conical end directed towards the spreading plate, a head part connected to the barrel part and a guide ring arranged between the conical end and the head part. have The guide ring is formed by a surface in the form of a right circular cylinder, the generatrix of which fits loosely into the thread of the pivoting profile body.

A series of adjusting inserts with guide rings of the same diameter but of different heights are attached to the spreading head, making it possible to vary the axial size of the vortex chamber and the opening angle of the spreading cone. .

Furthermore, a series of spreading platelets, which are formed by spreading openings of the same thickness but of different dimensions, are attached to the spreading head, thereby making it possible to vary the area of action of the jet.

A bushing is inserted into the casing, which guides the pivoting profile body and the insert member toward each other and at the same time facilitates their installation.

The casing connects tightly to the supply pipe of the liquid to be jetted. Screw +h (40) A packing ring is inserted between the vine cap and the scattering plate.

Compared to known solutions, the circulation according to the invention!
? 'l Cloth heads have many advantages. The most important advantage is that it is not necessary to always use a new series of swirl profiles for each individual spreading plate, i.e. the spreading parameters can be varied by changing the axial length of the swirl chamber. be.

The geometry of the spreading head prevents abrupt changes in direction of the liquid, thereby avoiding blockages of the spreading head that would cause operational disturbances. In contrast to infinitely adjustable spreading heads, where the adjustment of the spreading efficiency is complex and imprecise, the exchange of the inserts used for adjustment allows for precisely determined spreading platelets with given dimensions. The distribution efficiency is correlated, which greatly simplifies the adjustment of the injection device.

Furthermore, it is advantageous that modifications of the dispersion, cone angle or working area carried out by changing the insert only have a small effect on the size of the ejected droplets. The technical and operational advantage is that the spreading head consists of only a few components and these components can be easily assembled, with the most complex component being replaced, namely the swiveling profile body. There's no need to do it at all.

Next, the present invention will be explained in detail using the accompanying drawings.

FIG. 1 shows all the components of the circulating distribution head according to the invention. The insert 3, the pivoting profile 2 and the spreading plate 1 used for adjustment are
It is mounted within the casing 6 of the spreading head. The distribution plate 1 is designed with a distribution opening 10 in a manner known per se. The spreading opening 10 extends into the trumpet 10a at the inwardly directed end of the spreading head. The cone angle of the flange 10a matches the cone angle of the conical end 31a of the insert member 3. The insert 6 used for adjustment is inserted into the central bore of the pivoting profile body 2, and between the head 31 and the inner side of the spreading plate there is a swirl chamber 4.
There is. Along the inner surface of the turning profile body 2, a helical thread 2a is formed. This helical thread forces the liquid entering from the central bore 11 of the dispensing head into a helical motion.

The housing 6 of the spreading head is equipped with a connecting fitting 9 which is advantageously connected to the ejection device via a thread 6ja on the connecting member 6 and which prevents liquid from escaping. A bushing 5 is disposed within the body portion 62 of the casing 6. The bushing 5 facilitates the mounting of the pivoting profile body 2 and the insert member B and at the same time determines their relative position. A threaded lock cap 7 for fixing the distribution plate 1 to the casing 6 is screwed onto the thread 62a of the body portion 62. A packing ring 8 is expediently inserted between the distribution plate 1 and the locking cap 7.

As is clear from FIG. 2, by appropriate use of the various inserts 6 used for adjustment, it is possible to vary the spreading cone angle and, inversely, the spreading range of action. The insert member 3 consists of three components: a head 31;
It consists of a body portion 32 and guide ribs 33.

The club-shaped head 31 likewise consists of six parts: a conical end 31a pointing toward the spreading plate 1, a guide ring 31b1 forming the central part of the head, and a central bore 11.
It consists of a head portion 31c that is oriented in a direction. The head 31 is
It is connected to the body portion 32 along the head portion 31c.

As is clear from FIG. 3, the guide rib 33
It protrudes radially from.

The guiding ribs 36 divide the liquid entering through the central bore 11 into several parts, these flow parts being
The helical thread 2a between the pivoting profile body 2 and the head 61 of the insert part B is reached separately. The insert member 3 fits loosely into the pivoting profile body 2 .

As is clear from FIG. 3, the guide rib 33 has a shoulder portion 33a.
The dimensions of this shoulder correspond to the thickness of the bushing 5. Therefore, the head portion 31, body portion 32, and guide ribs 63 can be easily
It is easily verified that it forms a single component that is replaceable and operable.

As is clear from FIG. 2, the guide ring 3 of the head 31
1b have different axial lengths, and the insert member can protrude into the swirling profile body 2 to different extents, thereby shortening or lengthening the axial length of the vortex chamber 4. It is possible to do so.

As is clear from FIG. 2a, when the vortex chamber 4 is long,
The liquid travels a short path in the spiral thread 2a. The liquid is
The flow passes through the spreading head in such a way that the spreading opening 10 has a small opening angle depending on the spreading cone angle. What is illustrated in FIG. 2b is the case where the guide ring 31b of the head 31 is higher, so that the vortex chamber 4 becomes shorter. In this case the liquid is forced to follow a longer path in the helical thread 2a.

If a longer guide ring 31b is inserted, a situation as illustrated in FIG. 2c will be created, in which position the dispersion cone angle will be even larger than in FIG. 2b. Of course, not only three inserts 6 are provided for a dispensing opening with given dimensions, but any number of inserts can be provided. Correspondingly,
It is possible to vary the dispersion cone angle and therefore the area of action of the dispersion within a wide range.

Due to its simple construction and easy operation, the spraying head according to the invention can be used for the spraying of any agricultural plant protection agent, while also allowing the sprayed liquid to be sprayed in a controlled manner. , for example in lacquer spreaders operating under pressure, the spreading head according to the invention can also be advantageously installed in such cases.

[Brief explanation of the drawing]

1 is a longitudinal sectional view of the spreading head, FIG. 2 is a view showing the adjustment of the spreading parameters, and FIG. 6 is a perspective view of the insert used for adjustment. 1... Scatter plate 2... Swiveling profile body 2a... Screw thread 3 of the swiveling profile body 4... Insert member 4... Vortex chamber 5... Bush 6.
...Casing 7...Threaded lock cap 8...Packing ring 10...Spreading opening 11.
・Center drilling 61 ・Head part 31a of the insertion member
... Conical end 31b of the head of the insertion member ... Guide ring 31c of the head of the insertion member ... Head portion 32 of the head of the insertion member ... Body portion 33 of the insertion member ... Guide rib

Claims (1)

[Scope of Claims] (1) Circulating spray head for spraying a liquid under pressure and spraying it in the form of a mist onto a desired surface, in particular for spraying a plant protection agent onto the ground and/or on a plant cultivation area. The divisor cloth head is provided with a casing suitable for connection of a supply pipe for the liquid to be ejected, a central perforation for guiding the liquid into the casing, and a vortex chamber communicating with the central perforation. a replaceable sparge plate on the side opposite the perforation, and the liquid flows through the vortex chamber in a spiral movement about an axis coaxial with the longitudinal axis of the casing and leaves the system via the sparge plate; A spreading platelet is formed by a spreading opening used to drain the liquid along the conical surface and advantageously occupies a position coaxial with the longitudinal axis of the vortex chamber and is fixed to the casing by a threaded locking cap. In the circulating spreading head, in the casing (6),
A swirling profile body (2) is inserted which encloses the vortex chamber (4) and imparts a swirling motion along the inner surface by means of a helical thread (2a) to the flowing liquid, and this swirling profile body Vortex chamber (4) placed inside (2)
A replaceable insert (6) is inserted in the interior, by means of which the central bore (1) of the casing (6) is inserted.
Circulating spreading spatula characterized in that the axial length of the swirl chamber (4) from 1) can be determined or adjusted
Do. (2) Each insert (6) connects a club-shaped head (31) projecting into the swirl chamber (4) to the dispersion head and extends rearwardly in the direction of the central bore (11). Torso part 02)
and is provided with at least three guiding ribs (33) projecting radially from the barrel part (32) and longitudinally dividing the interior space (6a) of the casing. A circulating spreading head according to scope 1. (6) The head of the insertion member (6) used for adjustment (
31) has a conical end (
31a), neck part (61c) connected to torso part (32)
, and a guide ring (61h) provided between the conical end (31a) and the neck part (31c). (4) The guide ring (31b) is characterized in that it is formed by a cylindrical vertical surface, the generatrix of which fits into the helical thread +I-+ (2a) of the pivoting profile body (2). A circulating spreading head according to claim 2 or 6. (5) Each spreading head is provided with a series of inserts (3) used for adjustment, these inserts (3)
) with the same diameter but different height guide rings (3
1b), whereby the axial dimension of the vortex chamber (4) and the opening angle of the dispersion cone can be varied. Circulating spreading head as described in . (6) A series of spreading platelets (1) are attached to each spreading head, which spreading platelets (1) are formed by spreading openings (10) of the same thickness but of different dimensions, so that the spray 6. A circulating spraying spatula according to any one of claims 1 to 5, characterized in that the range of action can be changed. (7) guiding the pivoting profile body (2) and the insert element (3) used for adjustment in the casing (6) opposite to each other and simultaneously guiding both the casing (6);
Circulating spreading head according to any one of claims 1 to 6, characterized in that a bushing (5) is inserted to facilitate installation in the circulation spreading head. (8) Circulating spraying according to any one of claims 1 to 7, characterized in that the casing (6) is tightly connected to a supply pipe of the liquid to be jetted. head. (9) Threaded lock cap (7) and scattering plate (
9. A circulating spray head according to claim 1, characterized in that a sealing ring (8) is inserted between the parts 1).