JP2019017304A - Electrostatic spray nozzle, electrostatic spray device, spray method of electrostatic spray device, spray device and spray method of spray device - Google Patents

Abstract

To provide an electrostatic spray nozzle, an electrostatic spray device, a spray device, and a spray method of the electrostatic spray device and a spray method of the spray device capable of spraying a liquid over a wide range without increase of a number of nozzles, and spraying a liquid over a wide range even when a nozzle with a narrow spray angle is used.SOLUTION: An electrostatic spray nozzle N comprises a nozzle body 41 for spraying a liquid for electrifying a spraying object liquid and spraying the liquid to an object, the electrostatic spray nozzle further comprises a first electrode 421 for electrifying the liquid sprayed from the nozzle body 41 and a second electrode 422 provided close to a spray direction of the liquid relative to the first electrode.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electrostatic spray nozzle, an electrostatic spraying device, a spraying method for an electrostatic spraying device, a spraying device, and a spraying method for a spraying device.

  In order to spray a liquid such as an agrochemical in the form of a mist on a target, for example, a spraying device in which a plurality of nozzles are arranged in parallel along a long pipe is used.

  For example, Patent Document 1 includes a spray member provided with a plurality of nozzles along a pipe, an extension pipe, and a tank for supplying a chemical solution. The extension pipe is connected to the nozzle so that the extension pipe can be expanded and contracted, and when the extension pipe is accommodated in the spray member, a flow path to the nozzle is formed. A pesticide spraying device capable of maintaining a smooth ejection state is disclosed.

JP, 2006-015919, A

  However, in the conventional spraying apparatus as described above, in order to allow the mist-like liquid to reach from corner to corner, it is required that the spray angle when the liquid is sprayed from the nozzle is wide.

  For example, when spraying a liquid in a predetermined range in the juxtaposed direction of the plurality of nozzles, using a nozzle with a narrow spray angle requires a larger number of nozzles than using a nozzle with a wide spray angle. That is, as the number of parts (nozzles) increases, a wide range of spraying can be performed, but the increased number of nozzles increases the operability. Therefore, the selection of nozzles is limited in the conventional spraying device.

  However, in the agrochemical spraying device of Patent Document 1, such problems that the operability is inferior due to the increase in weight due to the increase in the number of nozzles and the problem that the degree of freedom in selecting the nozzles are not devised ,I can not cope.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electrostatic spray nozzle, an electrostatic spray device, and a spray device that are capable of spraying a wide range of liquids and that are excellent in workability. The present invention also provides a spraying method for the electrostatic spraying device and a spraying method for the spraying device.

  The electrostatic spray nozzle according to the present embodiment includes a nozzle body that sprays liquid, and in the electrostatic spray nozzle that charges the sprayed liquid and sprays it on an object, the liquid sprayed from the nozzle body is charged. And a second electrode provided in the direction of spraying the liquid from the first electrode.

  In the present embodiment, the second electrode is provided in the liquid spray direction from the first electrode, and after the liquid sprayed from the nozzle body is charged by the first electrode, It is attracted to the second electrode. Therefore, the spray range of the mist-like liquid is expanded.

  The electrostatic spray nozzle according to the present embodiment is characterized in that the second electrode is disposed in a region where the sprayed liquid forms a mist.

  In the present embodiment, the second electrode is arranged in a region where the sprayed liquid forms a mist, and attracts the particles of the mist-like liquid charged by the first electrode. Accordingly, the spray range of the mist-like liquid is more effectively expanded.

  The electrostatic spray nozzle according to the present embodiment is characterized in that the first electrode has a cylindrical shape, and the second electrode has an annular shape having an inner diameter larger than an inner diameter of the first electrode.

  In this embodiment, when the mist-like liquid particles charged through the first electrode pass through the second electrode having a larger inner diameter than the first electrode, the particles are attracted to the second electrode side. The spray range of the mist-like liquid is expanded.

  The electrostatic spray nozzle according to the present embodiment is characterized in that the second electrode has an inner diameter that increases toward the spray direction.

  In the present embodiment, since the inner diameter of the second electrode increases toward the spraying direction, the range of the mist-like liquid attracted to the second electrode side is also widened. Accordingly, the spray range of the mist-like liquid is more effectively expanded.

  The electrostatic spray nozzle according to the present embodiment has a funnel shape smaller in inner diameter than the first electrode and the second electrode, and includes a waterproof part that covers the first electrode and the second electrode. .

  In the present embodiment, since the first electrode and the second electrode are covered by the waterproof part, it is possible to ensure the safety of using the electrostatic spray nozzle.

  An electrostatic spraying device according to the present embodiment includes an electrostatic spray nozzle according to any one of the above-described embodiments, a pump that sends liquid to a nozzle body included in the electrostatic spray nozzle, and the electrostatic spraying device. A power supply for supplying power to the first electrode and the second electrode provided in the spray nozzle is provided.

  In the present embodiment, electric power is supplied to the first electrode and the second electrode of the electrostatic spray nozzle by the power source, and liquid is sent to the nozzle body of the electrostatic spray nozzle by the pump. In addition, since any one of the electrostatic spray nozzles described above is used, both a wide range of spraying and improved workability can be achieved.

  In the electrostatic spraying device according to the present embodiment, the electrostatic spraying device includes a nozzle body that sprays liquid, and includes an electrostatic spraying nozzle that charges the sprayed liquid and sprays it on an object. In the spraying method to be performed, electric power is supplied to the first electrode for charging the liquid sprayed from the nozzle body and the second electrode provided in the liquid spraying direction from the first electrode, and directed downward. The electrostatic spray nozzle sprays liquid.

  In the present embodiment, electric power is supplied to the first electrode and the second electrode, and the sprayed liquid is charged by the first electrode and then drawn to the second electrode. Therefore, the spray range of the liquid is expanded. Further, since the electrostatic spray nozzle sprays the liquid downward, the reaction acts upward, and the weight felt by the operator due to the weight of the apparatus can be reduced.

  The spraying apparatus according to the present embodiment includes a spraying apparatus in which a plurality of spraying nozzles spraying liquid and spraying on a target object are arranged in parallel along a rod-like member, and the plurality of spraying nozzles spray liquid. It is characterized by including a narrow-angle spray nozzle whose spray angle is narrower than other spray nozzles.

  In the present embodiment, the spray angle of the narrow angle spray nozzle is narrower than that of other spray nozzles, so that the reaction associated with spraying is stronger than that of other spray nozzles. Therefore, compared with the case where the plurality of spray nozzles have the same spray angle, the weight felt by the operator can be reduced. Further, nozzles other than the narrow-angle spray nozzle can spray over a wide range.

  The spraying device according to the present embodiment is characterized in that the narrow-angle spray nozzle is arranged on one end side of the rod-shaped member with respect to other spray nozzles.

In the present embodiment, the narrow-angle spray nozzle is arranged on one end side far from the worker or one end side close to the worker.
In the rod-like member, the change in weight felt by the worker becomes relatively larger as the distance from the worker increases. Therefore, when the narrow-angle spray nozzle having a stronger reaction than the other spray nozzles is arranged on one end side of the rod-shaped member far from the worker, the weight felt by the worker can be efficiently reduced. On the other hand, when the narrow-angle spray nozzle whose reaction is stronger than the other spray nozzles is arranged on one end side of the rod-shaped member close to the worker, the operator can prevent instability of operation due to a large change in weight. You can reduce the weight you feel.

  In the spraying device according to the present embodiment, the plurality of spraying nozzles are electrostatic spraying nozzles that charge and spray the sprayed liquid.

  In the present embodiment, since the plurality of spray nozzles are electrostatic spray nozzles, even when the spray angle is narrow, a mist-like liquid can be sprayed over a wide range. In addition, when the spray angle is narrow, the reaction becomes large and the weight felt by the worker is reduced, so that workability is improved.

  In the spraying device according to the present embodiment, the spray angle of the narrow-angle spray nozzle is 80 ° or less.

  In the present embodiment, the spray angle of the narrow-angle spray nozzle is 80 ° or less, and the spray angle of other spray nozzles is wider than 80 °.

  In the spraying device according to the present embodiment, the narrow-angle spray nozzle is the electrostatic spray nozzle according to any one of the above-described inventions.

  In the present embodiment, since the narrow-angle spray nozzle is any one of the electrostatic spray nozzles described above, the mist-like liquid can be sprayed over a wide range even with the narrow-angle spray nozzle. Further, since the narrow angle spray nozzle has a larger reaction than the other spray nozzles, the weight felt by the operator can be reduced.

  The spraying method of the spraying device according to the present embodiment is a spraying method performed by a spraying device in which a plurality of spraying nozzles spraying liquid and spraying on a target object are arranged in parallel along a rod-shaped member. The spray nozzles include spray nozzles having a narrower spray angle than other spray nozzles, and the plurality of spray nozzles sprays liquid downward.

  In the present embodiment, the plurality of spray nozzles include spray nozzles having a narrower spray angle than other spray nozzles, and when the plurality of spray nozzles sprays liquid, the liquid is directed downward. Spray. In particular, in a spray nozzle having a narrower spray angle than other spray nozzles, the reaction acts strongly upward, so that the weight felt by the operator due to the weight of the apparatus can be reduced.

  According to the present embodiment, a wide range of liquid spraying is possible even when a nozzle having a narrow spray angle is used. Further, a wider range of liquid can be dispersed without increasing the number of nozzles. In other words, since the number of nozzles can be reduced, the number of parts and weight can be reduced. Therefore, workability is improved.

It is a schematic diagram which shows typically the structure of the electrostatic spraying apparatus which concerns on Embodiment 1. FIG. It is the figure which expanded and represented only the spreading machine of the electrostatic spraying apparatus which concerns on Embodiment 1. FIG. 3 is a cross-sectional view showing an electrostatic spray nozzle of the electrostatic spray device according to Embodiment 1. FIG. It is explanatory drawing explaining an effect | action of the electrostatic spraying nozzle of the electrostatic spraying apparatus which concerns on Embodiment 1. FIG. It is a schematic diagram which shows typically the some electrostatic spraying nozzle of the electrostatic spraying apparatus which concerns on Embodiment 2. FIG. FIG. 9 is a schematic diagram schematically showing a plurality of electrostatic spray nozzles of an electrostatic spray device according to Embodiment 3. It is a schematic diagram which shows typically the several electrostatic spraying nozzle of the electrostatic spraying apparatus which concerns on Embodiment 4. FIG.

  Below, the electrostatic spraying nozzle, the electrostatic spraying apparatus, the spraying method of the electrostatic spraying apparatus, the spraying apparatus, and the spraying method of the spraying apparatus according to the embodiments of the present invention will be described in detail based on the drawings.

(Embodiment 1)
FIG. 1 is a schematic diagram schematically showing the configuration of the electrostatic spraying device according to the first embodiment.
In the figure, reference numeral 100 denotes an electrostatic spraying device, and the electrostatic spraying device 100 includes a sprayer 10 (spreading device) and a tank unit 5. The spreader 10 includes an electrostatic spray nozzle N, and the tank unit 5 includes a power source 51, a pump 52, and a tank 53. In the electrostatic spraying device 100, the power supply 51 supplies power to the electrostatic spraying nozzle N of the spreader 10, and the pump 52 is rotated by the power supply 51, whereby the liquid in the tank 53 is sent to the sprayer 10. Electric power and liquid sent from the tank unit 5 are sent to the spreader 10 via the cable C. That is, the cable C includes an electric wire that supplies electric power from the power source 51 and a hose that supplies liquid from the tank 53. The electrostatic spray nozzle N sprays the liquid onto an object (for example, a crop) T.
The tank unit 5 may be used on the back of an operator, or may be used on a wheelbarrow or the like.

  FIG. 2 is an enlarged view of only the spreader 10 of the electrostatic spraying device 100 according to the first embodiment. The spreader 10 includes a grip part 1, a collar part 2, and a jet tube 3. The grip part 1, the collar part 2, and the jet tube 3 are arranged in a straight line in this order. A plurality of electrostatic spray nozzles N <b> 1 to N <b> 5 are provided at one end of the electrostatic spraying device 100, and a gripping unit 1 is provided at the other end of the electrostatic spraying device 100. An operator operates the spreader 10 while holding the grip portion 1. Hereinafter, for convenience of explanation, the plurality of electrostatic spray nozzles N1 to N5 are also simply referred to as electrostatic spray nozzles N.

  More specifically, a rod-like collar portion 2 is connected to the grip portion 1, and the collar portion 2 is configured to be able to expand and contract in the longitudinal direction. Accordingly, the distance from the jet tube 3, that is, the gripping portion 1 to the electrostatic spray nozzle N can be adjusted as necessary. The collar part 2 has a pipe shape. The cable C is connected to the injection tube 3 via the grip portion 1 and the collar portion 2.

  A jet tube 3 is connected to one end side of the flange portion 2. The jet tube 3 (bar-shaped member) has a hollow bar shape, and a plurality of electrostatic spray nozzles N are provided at regular intervals, for example. That is, each electrostatic spray nozzle N communicates with the injection tube 3. The plurality of electrostatic spray nozzles N are arranged in parallel from one end of the jet tube 3 to the other end. A cable C is connected to the other end of the jet tube 3. An electric wire of the cable C extends along the jet tube 3 and is connected to an electrode to be described later of each electrostatic spray nozzle N.

  FIG. 3 is a cross-sectional view showing the electrostatic spray nozzle N of the electrostatic spray device 100 according to the first embodiment. As shown in FIG. 3, the electrostatic spray nozzle N includes a nozzle body 41, an electrode portion 42, a waterproof member 43, and a holding member 44.

  The nozzle body 41 has a cylindrical shape. The nozzle body 41 includes a proximal end portion connected to the injection tube 3 and a distal end portion provided with a spray port 411. The liquid (for example, liquid agrochemical) sent to the nozzle body 41 through the jet tube 3 passes through the nozzle body 41 from the base end portion to the tip portion of the nozzle body 41 and sprays from the spray port 411. Is done. The spray direction of the liquid from the nozzle body 41 is a direction away from the spray port 411 along the axial length direction of the nozzle body 41. Therefore, when the spray port 411 is downward, the spray direction is downward. That is, the operator operates the spreader 10 so that the spraying direction faces the ground.

  The electrode part 42 has conductivity and is made of metal, for example. The electrode unit 42 includes a charging unit 423 and two connection terminals 45 and 45. The charging unit 423 is connected to the power source 51 through the connection terminal 45 as described later. The electrode unit 42 negatively charges the liquid sprayed from the nozzle body 41.

  The electrode unit 42 includes a first electrode 421 and a second electrode 422. A first electrode 421 and a second electrode 422 are arranged in this order from the nozzle body 41 (spray port 411) in the spray direction. That is, the second electrode 422 is provided in the spray direction from the first electrode 421. The first electrode 421 and the second electrode 422 are integrally formed.

  The first electrode 421 has a cylindrical shape having an axial center along the spray direction. The inner diameter of the first electrode 421 is larger than the outer diameter of the nozzle body 41. A second electrode 422 extends from the end of the first electrode 421 in the spray direction in the spray direction.

The second electrode 422 has an annular shape having an inner diameter larger than the inner diameter of the first electrode 421. The inner diameter of the second electrode 422 continuously increases toward the spray direction. In other words, the second electrode 422 has a funnel shape. The nozzle body 41, the first electrode 421, and the second electrode 422 are disposed around the same axis.
In this embodiment, the case where the second electrode 422 has a funnel shape has been described as an example. However, the present invention is not limited to this. For example, the second electrode 422 may have a cylindrical shape that is larger than the inner diameter of the first electrode 421 and has a constant inner diameter, or may have a cylindrical shape in which the inner diameter expands stepwise.

  In this embodiment, the case where the first electrode 421 and the second electrode 422 are integrally formed has been described as an example. However, the present invention is not limited to this. The first electrode 421 and the second electrode 422 may be separate members.

  Each connection terminal 45 has a rectangular plate shape, and extends from the side edge of the nozzle body 41 of the first electrode 421 along the axial length direction of the first electrode 421. The connection terminal 45 is elongated in the protruding direction. The protruding directions of the connection terminals 45 and 45 are the same as each other. The connection terminals 45 and 45 are separated from each other by 180 ° in the circumferential direction of the first electrode 421.

  The waterproof member 43 has insulating properties and waterproof properties, and is made of, for example, synthetic rubber or synthetic resin. The waterproof member 43 insulates and waterproofs the charging unit 423 of the electrode unit 42. The waterproof member 43 includes a funnel-shaped portion 431 (waterproof portion) and columnar portions 432 and 432.

  The funnel-shaped part 431 is arranged coaxially with the charging part 423 of the electrode part 42 and covers the charging part 423. That is, the funnel-shaped portion 431 has a funnel shape that follows the charging portion 423, and the charging portion 423 is embedded in the central portion in the thickness direction. The inner diameter of the funnel-shaped part 431 is smaller than the inner diameter of the charging part 423 and larger than the outer diameter of the nozzle body 41.

  Each cylindrical portion 432 has a cylindrical shape. The columnar part 432 protrudes in the axial length direction from the nozzle body 41 side edge of the funnel-like part 431. On the circumferential surface of the columnar portion 432, a plurality of ridges each having appropriate elasticity are arranged in parallel in the axial length direction. The protruding directions of the columnar portions 432 and 432 are the same as each other. In the connection terminals 45 and 45 of the electrode part 42, the end part on the charging part 423 side is arranged at the axial center of the cylindrical parts 432 and 432. That is, the tip ends of the connection terminals 45 and 45 are exposed to the outside of the waterproof member 43. The part embedded in the waterproof member 43 of the electrode part 42 is insulated and waterproofed.

  The electrode part 42 and the waterproof member 43 are integrated by insert molding. The electrode part 42 is inserted into the mold of the waterproof member 43, and then synthetic rubber or synthetic resin is injected into the mold, whereby the integrated electrode part 42 and the waterproof member 43 can be easily obtained. . Since the electrode part 42 and the waterproof member 43 are integrated, for example, a person cannot pick up the connection terminal 45 of the electrode part 42 and remove the electrode part 42 from the waterproof member 43.

  The holding member 44 has an insulating property and a waterproof property, and is made of, for example, a synthetic resin. The waterproof member 43 and the nozzle body 41 are accommodated in the holding member 44.

  The electrostatic spray nozzle N is connected to a power source 51 of the tank unit 5 via an electric wire 46. The electric wire 46 is a covered electric wire, and a connection terminal is provided at one end of the conducting wire, and the connection terminal is connected to one or both of the connection terminals 45 and 45 of the electrode part 42.

  The electrostatic spray nozzle N is connected to the pump 52 via the jet tube 3 and the cable C. The pump 52 pressurizes the liquid stored in the tank 53 and sends it to the electrostatic spray nozzle N through the jet tube 3 and the cable C. Then, the liquid is sprayed from the spray port 411 of the nozzle body 41.

  In the electrostatic spray nozzle N, the charging part 423 of the electrode part 42 and the funnel-like part 431 of the waterproof member 43 are disposed at positions separated from the nozzle body 41 by an appropriate length in the spraying direction, and liquid is sprayed from the nozzle body 41. In such a case, the liquid is configured to surround the liquid. The axial length direction of each of the first electrode 421, the second electrode 422, the funnel-shaped portion 431, and the columnar portion 432 is along the spray direction of the liquid sprayed by the nozzle body 41.

  In the tank unit 5, the power supply 51 is a positive power supply device that has a primary battery or a secondary battery and outputs a positive high voltage. The power source 51 further has an output terminal and a ground terminal. The ground terminal of the power source 51 is grounded. The other end of the conducting wire of the electric wire 46 is connected to the output terminal of the power supply 51 via the cable C.

  In the present embodiment, the electrostatic spraying device 100 includes a plurality of electrostatic spraying nozzles N1 to N5. In this case, the connection terminals of the electric wires 46 and 46 are connected to both of the connection terminals 45 and 45 of the electrode portion 42 provided in each electrostatic spray nozzle N. The power supply 51 and the electrode portions 42, 22,... Of the electrostatic spray nozzles N1 to N5 are connected in series via electric wires 46, 46,. In addition, the electrostatic spray nozzle N1 farthest from the power source 51 has the connection terminal of the electric wire 46 connected to one of the connection terminals 45 and 45 of the electrode part 42.

  The positive high voltage output from the power source 51 is applied to the electrode unit 42 through the electric wire 46. As a result, the electrode part 42 is positively charged. The power source 51 does not have a battery, and may be connected to a commercial power source or a generator outside the electrostatic spraying device 100.

  The electrostatic spray nozzle N is used, for example, such that liquid is sprayed toward a crop planted in the field (target T). When the electrode part 42 is positively charged, the liquid sprayed from the nozzle body 41 is negatively charged. The charged liquid tends to adhere to the crops planted in the field due to the electrostatic effect.

  FIG. 4 is an explanatory diagram for explaining the operation of the electrostatic spray nozzle N of the electrostatic spray device 100 according to the first embodiment. In FIG. 4, for convenience of explanation, a cross section of the electrostatic spray nozzle N is schematically shown.

  The liquid sprayed from the spray port 411 of the nozzle body 41 forms a liquid film (liquid film) immediately after being sprayed. Thereafter, the water droplets are separated from each other and changed to a mist shape, and sprayed on the object T as a mist shape. That is, in the spraying direction, the liquid sprayed from the spray port 411 becomes a mist through a liquid film region L forming a liquid film, a separation area Z where water droplets are separated from each other, and a fog area F forming a mist. .

  As described above, the nozzle body 41, the first electrode 421, and the second electrode 422 are arranged in parallel around the same axis. Accordingly, the liquid sprayed from the spray port 411 of the nozzle body 41 passes through the insides of the first electrode 421 and the second electrode 422.

The first electrode 421 is disposed in the vicinity of the separation area Z so as to surround the liquid sprayed from the spray port 411. Specifically, the position of the first electrode 421 is configured to overlap at least a part of the separation area Z in the spraying direction.
Since the first electrode 421 is positively charged, the mist particles formed in the separation area Z by the separation of water droplets are negatively charged. Also, the negatively charged mist particles repel each other because they have the same polarity (negative). Accordingly, the distance between the mist particles increases, and the range of the separation area Z in the direction intersecting the spray direction is expanded.

The second electrode 422 is disposed in the fog area F. Specifically, the position of the second electrode 422 is configured to overlap the fog area F in the spray direction.
As described above, in the fog area F, the negatively charged mist particles repel each other because they have the same polarity. Furthermore, since the second electrode 422 is positively charged, fog particles are attracted to the second electrode 422. Therefore, the distance between the mist particles further increases, and the range of the separation area Z in the direction crossing the spraying direction is expanded.
In addition, as described above, the second electrode 422 has a configuration in which the inner diameter sequentially increases toward the spray direction, so that the separation area Z in the direction intersecting the spray direction as the spray direction is reached. This range is further expanded.

  Since it has such a configuration, in the electrostatic spraying device 100 according to the first embodiment, the angle (spraying angle) at which the liquid is sprayed from the nozzle body 41 is narrow or wide, and it is in a wide range. Liquid (mist) can be sprayed. Accordingly, it is possible to increase the degree of freedom in selecting the nozzle body 41 in manufacturing the apparatus.

  The power supply 51 may be a negative power supply device that outputs a negative high voltage. In this case, since the electrode part 42 is negatively charged, the liquid sprayed from the nozzle body 41 is positively charged.

  Moreover, in this Embodiment, although the electrostatic spraying apparatus 100 demonstrated to the example the case provided with several electrostatic spraying nozzles N1-N5, it does not restrict to this. The electrostatic spraying device 100 may include a single electrostatic spraying nozzle N.

(Embodiment 2)
FIG. 5 is a schematic diagram schematically illustrating a plurality of electrostatic spray nozzles N1 to N5 of the electrostatic spray device 100 according to the second embodiment. In the electrostatic spraying device 100 according to Embodiment 2, the plurality of electrostatic spraying nozzles (spraying nozzles) N1 to N5 are arranged in parallel from the one end 31 of the injection tube 3 in the order of N1, N2, N3, N4, and N5. Has been. In other words, the electrostatic spray nozzle N1 is closest to the one end 31 of the jet tube 3, and the electrostatic spray nozzle N5 is closest to the other end of the jet tube 3. The electrostatic spray nozzle N has already been described, and detailed description thereof will be omitted.

  The plurality of electrostatic spray nozzles N1 to N5 have different spray angles. More specifically, the spray angle of the electrostatic spray nozzle N1 (narrow angle spray nozzle) is the narrowest among the plurality of electrostatic spray nozzles N1 to N5. For example, the spray angle of the electrostatic spray nozzle N1 is 80 ° or less, and the spray angles of the electrostatic spray nozzles N2 to N5 are 110 °. The spray angle of the electrostatic spray nozzle N1 may be 10 ° or more and 80 ° or less. In the following, for convenience of explanation, the spray angle of the electrostatic spray nozzle N1 is 80 °. Although the spray angle of the electrostatic spray nozzle N1 is the narrowest, as described above, the range of the fog area F is expanded to the same extent as the other electrostatic spray nozzles N by the first electrode 421 and the second electrode 422.

On the other hand, in the case of the electrostatic spraying device 100 (spreading device 10) provided with a plurality of electrostatic spraying nozzles N1 to N5, the spraying device 10 (spreading device), in particular, the one end 31 is heavy. Is easy to get tired and the operation of the spreader 10 becomes difficult. Furthermore, since the plurality of electrostatic spray nozzles N1 to N5 are concentrated on the one end portion 31 of the spreader 10, the one end portion 31 of the spreader 10 tends to be lowered during the operation. In such a case, there arises a problem that the liquid cannot be uniformly sprayed on the object T.
However, the electrostatic spraying device 100 according to the present embodiment having the above-described configuration can solve such a problem. This will be described in detail below.

  When the liquid is sprayed from the spray port 411 of the nozzle body 41, the nozzle body 41 has a reaction on the side opposite to the liquid spraying direction. Such reaction acts as a reduction in the relative weight of the nozzle body 41. In other words, the worker feels lightly by the magnitude of such reaction. Such a reaction becomes larger as the spray angle of the liquid is narrower.

  On the other hand, in the electrostatic spraying device 100 according to the present embodiment, the spray angle of the electrostatic spraying nozzle N1 provided at the one end 31 that is farthest from the operator is more than the other electrostatic spraying nozzles N2 to N5. narrow. That is, the reaction acting at the electrostatic spray nozzle N1 is the largest. As described above, since the reaction at the electrostatic spray nozzle N1 farthest from the worker is the largest, the relative weight of the spreader 10 (one end portion 31) is effectively reduced, and the worker moves the jet tube 3 over. It can be kept level with respect to the ground. Therefore, the liquid can be uniformly distributed, and the workability of the operator is improved.

  Further, in the present embodiment, the spray angle of the other electrostatic spray nozzles N2 to N5 excluding the electrostatic spray nozzle N1 is 110 ° and wider than the electrostatic spray nozzle N1, so that a wide range of liquid can be sprayed. It is.

  In the present embodiment, the spray angle of the electrostatic spray nozzle N1 is narrower than that of the other electrostatic spray nozzles N2 to N5, but the electrostatic spray nozzle N1 is an electrostatic spray nozzle. The spraying range can be expanded to the same extent as the nozzles N2 to N5. Accordingly, it is possible to ensure the spread of the liquid over a wide range.

  In the present embodiment, the case where the spray nozzle is an electrostatic spray nozzle has been described as an example. However, the present invention is not limited to this, and the spray nozzle may not be an electrostatic spray nozzle.

  In the present embodiment, the case where only the spray angle of the electrostatic spray nozzle N1 is 80 ° has been described. However, the present invention is not limited to this. For example, the spray angle of the electrostatic spray nozzle N1 and the electrostatic spray nozzle N2 may be 80 °.

  Furthermore, in the present embodiment, the charging unit 423 in the electrostatic spray nozzles N1 to N5 is not limited to the description in the present embodiment, and may be a known one.

  The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

(Embodiment 3)
FIG. 6 is a schematic diagram schematically showing a plurality of electrostatic spray nozzles N <b> 1 to N <b> 5 of the electrostatic spray device 100 according to the third embodiment. Also in the electrostatic spraying device 100 according to the third embodiment, as in the second embodiment, a plurality of electrostatic spraying nozzles (spraying nozzles) N1 to N5 are arranged in parallel, and the electrostatic spraying nozzle N1 is the jet tube 3. The electrostatic spray nozzle N5 is closest to the other end portion of the injection tube 3.

  The plurality of electrostatic spray nozzles N1 to N5 have different spray angles. More specifically, among the plurality of electrostatic spray nozzles N1 to N5, the spray angle of the electrostatic spray nozzle N5 (narrow angle spray nozzle) is the narrowest. For example, the spray angle of the electrostatic spray nozzle N5 is 80 ° or less, and the spray angles of the electrostatic spray nozzles N1 to N4 are 110 °. The spray angle of the electrostatic spray nozzle N1 may be 10 ° or more and 80 ° or less. In the following, for convenience of explanation, the spray angle of the electrostatic spray nozzle N5 is 80 °. Although the spray angle of the electrostatic spray nozzle N5 is the narrowest, as described above, the range of the fog area F is expanded to the same extent as the other electrostatic spray nozzles N by the first electrode 421 and the second electrode 422.

  On the other hand, in the case of the electrostatic spraying device 100 (spreading device 10) provided with a plurality of electrostatic spraying nozzles N1 to N5, the sprayer 10 (spreading device) is heavy, so that the operability and workability of the spraying device 10 are poor. Further, since the plurality of electrostatic spray nozzles N1 to N5 are concentrated on the one end portion 31 of the spreader 10, the one end portion 31 of the spreader 10 is likely to be lowered, resulting in a problem that the liquid cannot be uniformly sprayed.

The plurality of electrostatic spray nozzles N1 to N5 are arranged in parallel from the one end 31 of the injection tube 3 in the order of N1, N2, N3, N4, and N5. Even with the same weight, the electrostatic spray nozzle N1 has the largest relative weight felt by the operator. Therefore, the influence of the substantial or relative weight change in the electrostatic spray nozzle N1 is large. That is, when a substantial or relative weight change occurs in the electrostatic spraying nozzle N1, an operation such as the one end 31 of the sprayer 10 shaking may be disturbed and the workability may be deteriorated due to such a change. is there.
However, the electrostatic spraying device 100 according to the present embodiment having the above-described configuration can solve such a problem. This will be described in detail below.

  In the electrostatic spraying device 100 according to the present embodiment, the spray angle of the electrostatic spraying nozzle N5 closest to the operator is narrower than the other electrostatic spraying nozzles N1 to N4. That is, the reaction acting on the electrostatic spray nozzle N5 is the largest. Thus, since the reaction at the electrostatic spray nozzle N5 closest to the operator is the largest, the relative weight of the spreader 10 (one end portion 31) is prevented while preventing a large change in the relative weight. Mitigation is obtained. Therefore, the operator can keep the jet tube 3 level with respect to the ground and can evenly disperse the liquid, thereby improving workability.

  In the present embodiment, the spray angle of the other electrostatic spray nozzles N1 to N4 excluding the electrostatic spray nozzle N5 is 110 °, which is wider than the electrostatic spray nozzle N5, so that a wide range of liquids can be sprayed. It is.

  In the present embodiment, the spray angle of the electrostatic spray nozzle N5 is narrower than that of the other electrostatic spray nozzles N1 to N4, but the electrostatic spray nozzle N1 is an electrostatic spray nozzle, and therefore other electrostatic sprays. The spraying range can be expanded to the same extent as the nozzles N2 to N5. Accordingly, it is possible to ensure the spread of the liquid over a wide range.

  In the present embodiment, the case where the spray nozzle is an electrostatic spray nozzle has been described as an example. However, the present invention is not limited to this, and the spray nozzle may not be an electrostatic spray nozzle.

  In the present embodiment, the case where only the spray angle of the electrostatic spray nozzle N5 is 80 ° has been described, but the present invention is not limited to this. For example, the spray angle of the electrostatic spray nozzle N5 and the electrostatic spray nozzle N4 may be 80 °.

  Furthermore, in the present embodiment, the charging unit 423 in the electrostatic spray nozzles N1 to N5 is not limited to the description in the present embodiment, and may be a known one.

  About the part similar to Embodiment 1-2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

(Embodiment 4)
FIG. 7 is a schematic diagram schematically showing a plurality of electrostatic spray nozzles N1 to N5 of the electrostatic spray device 100 according to the fourth embodiment. Also in the electrostatic spraying device 100 according to the fourth embodiment, a plurality of electrostatic spraying nozzles (spraying nozzles) N1 to N5 are arranged in parallel as in the second embodiment, and the electrostatic spraying nozzle N1 is the jet tube 3. The electrostatic spray nozzle N5 is closest to the other end portion of the injection tube 3.

  The plurality of electrostatic spray nozzles N1 to N5 have different spray angles. More specifically, among the plurality of electrostatic spray nozzles N1 to N5, the spray angle of the electrostatic spray nozzle N1 (narrow-angle spray nozzle) is the narrowest, and the spray angles are increased in the order of N1, N2, N3, N4, and N5. . For example, the spray angle of the electrostatic spray nozzle N1 is 80 ° or less, and may be, for example, 10 ° or more and 80 ° or less. The spray angle of the electrostatic spray nozzle N2 is 90 °, the spray angle of the electrostatic spray nozzle N3 is 100 °, the spray angle of the electrostatic spray nozzle N4 is 105 °, and the spray angle of the electrostatic spray nozzle N5 is 110 °. is there. In the following, for convenience of explanation, the spray angle of the electrostatic spray nozzle N1 is 80 °.

  On the other hand, in the case of the electrostatic spraying device 100 (spreading device 10) provided with a plurality of electrostatic spraying nozzles N1 to N5, the sprayer 10 (spreading device) is heavy, so that the operability and workability of the spraying device 10 are poor. Further, since the plurality of electrostatic spray nozzles N1 to N5 are concentrated on the one end portion 31 of the spreader 10, the one end portion 31 of the spreader 10 is likely to be lowered, resulting in a problem that the liquid cannot be uniformly sprayed.

  In the electrostatic spraying device 100 according to the present embodiment, the spraying angle of the electrostatic spraying nozzle N1 that is the farthest from the worker is the narrowest, and the spraying angle of the electrostatic spraying nozzle N gradually increases as the worker approaches the worker. Become wide. That is, the reaction that acts on the electrostatic spray nozzle N1 is the largest, and the reaction that acts on the electrostatic spray nozzle N becomes weaker as it approaches the operator.

  In this way, the reaction at the electrostatic spray nozzle N gradually decreases as the distance from the operator increases, so that a large change in the relative weight is prevented in advance, and the electrostatic spray nozzles N1 to N5 are prevented. Relative weight reduction can be obtained in a balanced manner as a whole. Therefore, stable operability can be ensured and workability is enhanced.

  In the above description, the electrostatic spraying apparatus 100 includes a plurality of electrostatic spraying nozzles N1 to N5, and the spray angle is increased in the order of N1, N2, N3, N4, and N5. It is not limited. In the plurality of electrostatic spray nozzles N1 to N5, the spray angle may be narrowed in the order of N1, N2, N3, N4, and N5.

  In the present embodiment, the case where the spray nozzle is an electrostatic spray nozzle has been described as an example. However, the present invention is not limited to this, and the spray nozzle may not be an electrostatic spray nozzle.

  About the part similar to Embodiment 1-3, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In addition, this invention is not restricted to the above description, You may implement | achieve by combining Embodiment 1 and either of Embodiment 2-4.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meanings, but is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.

DESCRIPTION OF SYMBOLS 3 Jet pipe 10 Spreading device 31 One end part 41 Nozzle main body 51 Power supply 52 Pump 100 Electrostatic spraying device 421 1st electrode 422 2nd electrode F Fog area N1-N5 Electrostatic spray nozzle T Target object Z Separation area

Claims (13)

In an electrostatic spray nozzle that has a nozzle body that sprays liquid and charges the sprayed liquid to spray on the object,
A first electrode for charging liquid sprayed from the nozzle body;
An electrostatic spray nozzle comprising: a second electrode provided in a spray direction of the liquid from the first electrode.   The electrostatic spray nozzle according to claim 1, wherein the second electrode is disposed in a region where the sprayed liquid forms a mist. The first electrode is cylindrical;
The electrostatic spray nozzle according to claim 1, wherein the second electrode has an annular shape having an inner diameter larger than an inner diameter of the first electrode.   The electrostatic spray nozzle according to any one of claims 1 to 3, wherein the second electrode has an inner diameter that increases in the spray direction.   5. The electrostatic spray nozzle according to claim 3, wherein the electrostatic spray nozzle has a funnel shape having an inner diameter smaller than that of the first electrode and the second electrode, and includes a waterproof portion that covers the first electrode and the second electrode. . An electrostatic spray nozzle according to any one of claims 1 to 5;
A pump for sending liquid to a nozzle body provided in the electrostatic spray nozzle;
An electrostatic spraying device comprising: a power supply that supplies power to the first electrode and the second electrode provided in the electrostatic spraying nozzle. In a spraying method performed in an electrostatic spraying device having an electrostatic spraying nozzle that has a nozzle body for spraying liquid and charges the sprayed liquid to spray on the object,
Supplying power to the first electrode for charging the liquid sprayed from the nozzle body, and the second electrode provided in the liquid spraying direction from the first electrode;
The electrostatic spraying device spraying method, wherein the electrostatic spraying nozzle sprays liquid downward. In a spraying device in which a plurality of spraying nozzles spraying liquid and spraying on a target object are arranged in parallel along a rod-shaped member,
The plurality of spraying nozzles include narrow angle spraying nozzles having a narrower spray angle at which the liquid is sprayed than other spraying nozzles.   The spraying device according to claim 8, wherein the narrow-angle spraying nozzle is disposed on one end side of the rod-shaped member with respect to other spraying nozzles.   The spraying device according to claim 8 or 9, wherein the plurality of spraying nozzles are electrostatic spraying nozzles that charge and spray the sprayed liquid.   The spraying device according to any one of claims 8 to 10, wherein the spray angle of the narrow-angle spray nozzle is 80 ° or less.   The spraying device according to claim 10, wherein the narrow-angle spray nozzle is the electrostatic spray nozzle according to claim 1. In a spraying method performed by a spraying device in which a plurality of spraying nozzles spraying liquid and spraying on a target object are arranged along the rod-shaped member,
The plurality of spray nozzles include spray nozzles having a narrower spray angle than other spray nozzles,
A spraying method for a spraying device, wherein the plurality of spraying nozzles spray liquids downward.

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