JP2008194655A - Charged mist deposit preventing means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a deposit of charged mist to an object to be protected. <P>SOLUTION: A charged mist desposit preventing means 1 for preventing deposit of charged mist S jetted from a spray nozzle 24 of an electrostatic atomizer 13 to the object to be protected comprises a cover member 2 installed between the spray nozzle 24 and the object to be protected so as to block the charged mist S directing to the object to be protected, and an electric potential imparting means 3 for imparting electric potential to the cover member 2. The cover member 2 has translucency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a charged spray adhesion preventing means for preventing charged spray sprayed from a spray nozzle of an electrostatic spray apparatus from adhering to a protection target.

  The charged spray ejected from the electrostatic spraying device (for example, refer to Patent Document 1) is obtained by using spray as charged particles, and has better spray adhesion to a grounded spray object than non-charged spray. . For this reason, when spraying agricultural chemicals, the amount of spraying can be reduced as compared with uncharged spraying, which is useful for reducing agricultural chemicals. Furthermore, it is expected as a highly efficient spraying means by using a multi-headed mouth.

JP 2004-122091 A

  However, since the charged spray is easily attracted and attached to the ground part, there is a problem that it is often attached to the ground part (for example, an operator who performs the spraying work) other than the spray target. In particular, when the particle size of the charged particles is small, the amount of charge per weight of the charged particles increases and the kinetic energy of the charged particles decreases, so for example, it is easy to ride the electric lines of force from the spray nozzle to the ground site, Easily attracted to the ground.

  Moreover, compared with the case of spraying by a hand-held nozzle described in Patent Document 1, in the case of spraying by a multi-head nozzle, the amount of charged spray increases according to the number of nozzles, and the amount of spray adhesion to the worker increases accordingly. There is.

  Further, when the nozzle hole is in a direction transverse to the traveling direction of the worker, the electric lines of force from the spray nozzle are likely to extend to the worker as the ground part, and the amount of spray adhesion to the worker increases accordingly. There is.

In order to solve the above problem, the charged spray adhesion preventing means of the first invention comprises:
Charged spray adhesion preventing means for preventing the charged spray ejected from the spray nozzle of the electrostatic spraying device from adhering to the protection object,
Spray blocking means provided between the spray nozzle and the protection target is provided so as to block the charged spray toward the protection target.

  Although it does not specifically limit as said spray interruption | blocking means, The aspect which is a cover member which interrupts | blocks the said charged spray, and the aspect which is the air flow discharged | emitted from a blower so that the said charged spray may be interrupted are illustrated. As the cover member, a lightweight one (for example, one made of a resin material or one made of a metal mesh) is suitable because it has good workability.

  According to this configuration, it is possible to prevent the charged spray from adhering to the protection target by blocking the charged spray by the spray blocking means.

As the charging spray adhesion preventing means of the second invention, in the first invention,
The aspect provided with the electric potential provision means in order to provide an electric potential to the said spray interruption | blocking means is illustrated.

  According to this configuration, the electric potential applying means can prevent the electric lines of force from extending from the high-pressure electrode of the spray nozzle to the protection target, and can prevent the charged spray from adhering to the protection target. .

As the charging spray adhesion preventing means of the third invention, in the second invention,
The spray blocking means is a cover member that is disposed so as to block the charged spray and has conductivity, and the potential applying means exemplifies an aspect configured to apply a potential to the cover member. To do.

  The cover member having conductivity is not particularly limited, but a conductive member such as metal is disposed on the surface of a non-conductive member such as a resin or an embodiment formed of a material having conductivity such as metal. The aspect which did is illustrated.

  According to this configuration, the first invention can be implemented at a low cost with a relatively simple configuration.

As the charging spray adhesion preventing means of the fourth invention, in the third invention,
The cover member is exemplified as having a translucency.

  The cover member having conductivity and translucency is not particularly limited. However, the cover member may be formed of a material having conductivity and translucency (for example, a transparent conductive resin), or conductive and non-transparent. An embodiment composed of a member having a large number of holes, notches or gaps made of a light-transmitting material (for example, a metal having conductivity and non-translucency), or a material having non-conductivity and translucency (for example, transparent A pattern having a large number of holes, notches or gaps formed on a surface of a cover member made of resin or glass) with a material having conductivity and non-permeability (for example, a metal having conductivity and non-translucency). A mode in which is provided is illustrated. Here, the “having a large number of holes, notches, or gaps” is not particularly limited, but an embodiment formed in a net shape or a stripe shape is exemplified.

  According to this structure, the opposite side can be visually observed from the protection target side or the spray nozzle side of the cover member, for example.

As the charging spray adhesion preventing means of the fifth invention, in the second invention,
The spray blocking means is an air flow discharged from a blower so as to block the charged spray, and the potential applying means is an ionizer that ionizes atoms or molecules contained in the air flow.

  Also according to this configuration, the first invention can be implemented.

As the charged spray adhesion preventing means of the sixth invention, in any one of the second to fourth inventions,
The potential applying unit exemplifies an aspect configured to set the spray blocking unit to a ground potential.

  According to this configuration, by extending the electric lines of force from the high voltage electrode of the spray nozzle to the spray blocking means having the ground potential, it is possible to prevent the electric lines of force from extending to the protection target. Thereby, the charged spray can be sucked and adhered to the spray blocking means.

As the charged spray adhesion preventing means of the seventh invention, in any one of the second to fifth inventions,
The potential applying means exemplifies an aspect in which the spray blocking means is configured to have a potential having a polarity opposite to the charge of the charged spray.

  According to this configuration, the charged spray can be sucked and adhered to the spray blocking means.

As the charged spray adhesion preventing means of the eighth invention, in any one of the second to fifth inventions,
The potential applying means exemplifies an aspect in which the spray blocking means is configured to have a potential having the same polarity as the charge of the charged spray.

  According to this configuration, the charged spray can be repelled against the spray blocking means.

As the charged spray adhesion preventing means of the ninth invention, in any one of the first to eighth inventions,
The said spray nozzle illustrates the aspect arrange | positioned so that a charged spray may be ejected in a horizontal direction with respect to the advancing direction of the said electrostatic spray apparatus.

  The electrostatic spray adhesion preventing means of the present invention is particularly effective when equipped in an electrostatic spray apparatus having such a configuration.

  According to the charged spray adhesion preventing means according to the present invention, there is an excellent effect that the adhesion of the charged spray to the protection target can be prevented.

  FIGS. 1-6 has shown the electrostatic sprayer 10 provided with the charging spray adhesion prevention means 1 of 1st embodiment which actualized this invention. As shown in FIGS. 1 to 4, the electrostatic sprayer 10 includes an electrostatic spray device 13 that ejects a charged spray S onto a machine body 12 supported by a single traveling wheel 11 so as to be able to travel in a field, and a charged spray. A charging spray adhesion preventing means 1 for preventing S from adhering to the protection target is mounted. In this example, the protection target is the upper half of the operator W who operates the electrostatic sprayer 10. In each figure, the arrow F indicates the front side of the aircraft.

  The machine body 12 includes a vertical frame 15 extending vertically. A traveling wheel 11 is rotatably supported at the lower end side of the vertical frame 15, and a grounding chain 20 as a conductor for grounding the airframe 12 and a high voltage generator 23 described later is grounded to the ground. It is attached to do. On the rear side of the vertical frame 15, a pair of right and left jet tubes 16 extending vertically are supported so as to be slidable up and down with respect to the vertical frame 15. The relative vertical position of the pair of jet tubes 16 with respect to the vertical frame 15 can be fixed by a clamper 17. Each jet tube 16 is connected to a supply means for supplying a liquid such as a chemical solution (not shown) via a cock 18. A handle 19 extending to the front side of the machine body is attached to the upper part of the vertical frame 15. The airframe 12 of this example is configured to advance when the operator W holds the grip 19a provided at the tip of the handle 19 by hand and pulls it forward of the airframe. When the supply means is installed in a field and the electrostatic sprayer 10 is configured to pull a long hose extending from the supply means, the liquid can be obtained by grounding a liquid such as a chemical solution on the supply means side. Since the airframe 12 and the high voltage generator 23 can be grounded through, the grounding chain 20 can be omitted.

  The electrostatic spraying device 13 is connected to the high voltage generating unit 23 that generates a high voltage and a plurality of charged sprays S that are composed of countless droplets that are charged by the high voltage. The spray nozzle 24 is provided. In this example, a high voltage generator 23 is provided in the middle of the handle 19 in the front-rear length direction, and four spray nozzles 24 are vertically spaced apart from each other in each jet tube 16. It is lined up. Each spray nozzle 24 can adjust the ejection direction of the charged spray S in the front-rear direction, the left-right direction, or the up-down direction.

  The charged spray adhesion preventing means 1 includes a cover member 2 as a spray blocking means provided between the spray nozzle 24 and the protection target so as to block the charged spray S directed to the protection target, and the cover member 2. And a potential applying means 3 for applying a potential. The cover member 2 is fixed to the grip side of the handle 19 with respect to the high voltage generator 23 by a fixing metal fitting 4 as a fixing means.

  The cover member 2 is disposed so as to block the charged spray S and has conductivity. The potential applying means 3 is configured to apply a potential to the cover member 2.

Although it does not specifically limit as the cover member 2, The following aspect is illustrated.
(1) An embodiment formed of a material having conductivity and translucency (for example, a transparent conductive resin).
(2) An aspect comprising a member having a large number of holes, notches, or gaps formed of a conductive and non-translucent material (for example, a metal having conductivity and non-translucency).
(3) A material having conductivity and non-permeability (for example, on the surface of the cover member that is made of non-conductive and translucent material (for example, transparent resin or glass) (surface on the side to be protected) A mode in which a pattern having a large number of holes, notches, or gaps formed by a conductive and non-transparent metal is provided.

  Moreover, as a shape of the cover member 2, in this example, as shown in FIG. 4, a shape curved toward the worker side so as to cover the upper part of the upper half of the worker W as a protection target and the left and right sides. Adopted. The shape of the cover member 2 is not limited to this shape. For example, as shown in FIG. 5A, the shape of the cover member 2 may be curved so as to cover only the left and right sides, or as shown in FIG. As shown, it can be changed as appropriate, such as making it flat.

  Although it does not specifically limit as the electric potential provision means 3, The following aspect is illustrated. In the following mode (b) or (c), as shown in FIG. 6, in order to prevent the potential of the cover member 2 from leaking to the handle, there is an electrical connection between the cover member 2 and the fixing bracket 4. It is preferable to interpose a leakage prevention unit 5 having insulating properties.

(A) A mode in which a portion made of a conductive material in the cover member 2 is connected to a grounded portion (the handle 19 or the like) (see FIGS. 1 and 3). According to this configuration, the electric lines of force L are extended from the high-voltage electrode of the spray nozzle 24 to the portion formed of the conductive material having the ground potential, thereby preventing the electric lines of force L from extending to the protection target. can do. As a result, the charged spray S can be sucked and adhered to the portion of the cover member 2 formed of the conductive material, and the charge of the charged spray S can be discharged.

(B) A mode (not shown) configured so that the portion of the cover member 2 formed of the conductive material has a potential opposite to the charge of the charged spray S. Specifically, a reverse polarity potential generating means (not shown) for generating a potential having a polarity opposite to the charge of the charging spray S (the height of the potential is not particularly limited) is added to the high voltage generating unit 23, and An example in which the output from the reverse polarity potential generator is connected to a portion formed of the conductive material is illustrated. According to this configuration, the charged spray S can be sucked and adhered to the portion of the cover member 2 formed of the conductive material.

(C) A mode (not shown) configured so that the portion formed of the conductive material in the cover member 2 has the same polarity as the electric charge of the charging spray S (the height of the electric potential is not particularly limited). . Specifically, the high voltage generator 23 is added with the same polarity potential generator (not shown) that generates a potential having the same polarity as the charge of the charging spray S, and the output from the same polarity potential generator The aspect connected to the site | part formed with the electroconductive material is illustrated. According to this configuration, the charged spray S can be repelled on the portion of the cover member 2 formed of the conductive material.

  According to the charged spray adhesion preventing means 1 of the present example configured as described above, the charged spray S is shielded by the cover member 2, and the electric potential is applied from the high voltage electrode of the spray nozzle 24 to the protection target. It is possible to prevent the force line L from extending. For this reason, adhesion of the charged spray S to the protection target can be prevented.

  Further, the cover member 2 is disposed so as to block the charged spray S and has conductivity, and the potential applying means 3 is configured to apply a potential to the cover member 2, and is relatively Since it is a simple structure, it can be implemented at low cost.

  Moreover, since the cover member 2 is provided with translucency, the opposite side can be visually observed from the protection target side or the spray nozzle side of the cover member 2, for example.

  Next, FIG. 7 shows a second embodiment that embodies the present invention. This charged spray adhesion preventing means 30 is mainly different from the first embodiment in the following points. Accordingly, portions common to the embodiment are given the same reference numerals, and redundant description is omitted.

  In the charged spray adhesion preventing means 30 of the present example, the spray blocking means is an air flow A discharged from the blower 31 so as to block the charged spray S, and the potential applying means is an atom included in the air flow A. Or it is comprised so that it may be the ionizer 32 which ionizes a molecule | numerator. Hereinafter, the ionized atom or molecule is referred to as “ion Ai”. In this example, the blower 31 and the ionizer 32 are housed in a housing 33.

  Although it does not specifically limit as the ionizer 32, The following aspect is illustrated.

(X) A mode in which atoms or molecules contained in the air flow A are ionized to have a polarity opposite to the charge of the charged spray S (see FIG. 7). According to this configuration, the charged droplets D constituting the charged spray S can be attracted and adhered to the ions Ai in the air flow A. The charged spray S can be electrically neutralized by bringing the ions Ai into contact with the charged droplets D constituting the charged spray.

(Y) An aspect (not shown) in which atoms or molecules contained in the air flow A are ionized to the same polarity as the charge of the charged spray S. According to this configuration, the charged spray S can be repelled against the air flow A containing the ions Ai.

(Z) A mode (not shown) in which atoms or molecules contained in the air flow A are ionized by an alternating high voltage. According to this configuration, the same effects as in (x) and (y) can be obtained.

Although it does not specifically limit as an arrangement | positioning location of the charging spray adhesion prevention means 30 of this example, The following aspect is illustrated.
(A) A mode in which the electrostatic sprayer 10 is disposed. Although not particularly limited, as shown in FIG. 7, an example of fixing with a fixture 4 as a fixing means on the grip side of the handle 19 with respect to the high voltage generator 23 is illustrated. At this time, the leakage preventive portion 5 shown in FIG. 6 of the first embodiment can be interposed between the charged spray adhesion preventing means 30 and the fixture 4.
(B) A mode of disposing the protection target. Although not particularly limited, when the subject of protection is the worker W as in this example, it can be hung from the neck of the worker W or worn on a part of the body (head, shoulder, chest, waist, etc.). An example of such a mode is illustrated.

  According to the charged spray adhesion preventing means 30 of the present example configured as described above, the charged spray S is blocked by the air flow A as the spray shielding means, and the spray nozzle 24 is controlled by the ionizer 32 as the potential applying means. It is possible to prevent the electric lines of force L from extending from the high voltage electrode to the object to be protected. For this reason, adhesion of the charged spray S to the protection target can be prevented.

In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) The configuration of the electrostatic sprayer 10 equipped with the present invention is appropriately changed. For example, the number of spray nozzles 24, the arrangement position, and the like are appropriately changed, the number of traveling wheels 11 is changed, and the airframe 12 is changed to an automatic cart configured to be capable of automatic traveling.
(2) To equip the present invention with a hand-held electrostatic spraying device.
(3) The mode of the spray blocking means is appropriately changed according to the protection target. For example, the size and shape of the cover member 2 can be changed as appropriate according to the protection target. More specifically, the cover member 2 is placed on the worker W so that the protection target is the whole body of the worker W. It is exemplified that the size and shape are adapted to the whole body. Moreover, the flow of the air flow A can be appropriately changed by changing the performance, the number, the arrangement position, and the like of the blower 31, and more specifically, substantially intersects the moving direction of the charged spray S. An example of flowing the air flow in the direction is illustrated.

It is a side view of the electrostatic sprayer provided with the charging spray adhesion prevention means which concerns on 1st embodiment which actualized this invention. It is a front view of the electrostatic sprayer. It is a top view of the electrostatic sprayer. It is a perspective view of the same charging spray adhesion prevention means. It is a perspective view which shows the example of a change of the same charging spray adhesion prevention means. It is sectional drawing which shows an example of the attachment structure of the same charging spray adhesion prevention means. It is a side view of the electrostatic sprayer provided with the charging spray adhesion prevention means which concerns on 2nd embodiment which actualized this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Charge spray adhesion prevention means 2 Cover member 3 Electric potential provision means 4 Fixing metal fitting 5 Electric leakage prevention part 10 Electrostatic sprayer 11 Traveling wheel 12 Airframe 13 Electrostatic spray device 15 Vertical frame 16 Jet pipe 17 Clamper 18 Cock 19 Handle 19a Grip 20 Grounding chain 23 High voltage generator 24 Spray nozzle 30 Charged spray adhesion preventing means 31 Blower 32 Ionizer 33 Case A Air flow F Front side L Electric field line S Charged spray W Worker

Claims (9)

Charged spray adhesion preventing means for preventing the charged spray ejected from the spray nozzle of the electrostatic spraying device from adhering to the protection object,
Charged spray adhesion preventing means provided with spray blocking means provided between the spray nozzle and the protection target so as to block the charged spray toward the protection target.   The charged spray adhesion preventing means according to claim 1, further comprising a potential applying means for applying a potential to the spray blocking means.   3. The spray blocking means is a cover member that is disposed so as to block the charged spray and has conductivity, and the potential applying means is configured to apply a potential to the cover member. The charged spray adhesion preventing means.   The charging spray adhesion preventing means according to claim 3, wherein the cover member has translucency.   The spray spray blocking means is an air flow discharged from a blower so as to block the charged spray, and the potential applying means is an ionizer that ionizes atoms or molecules contained in the air flow. Charge spray adhesion prevention means.   The charged spray adhesion preventing means according to any one of claims 2 to 4, wherein the potential applying means is configured to set the spray blocking means to a ground potential.   The charged spray adhesion preventing means according to any one of claims 2 to 5, wherein the potential applying means is configured to set the spray blocking means to a potential having a polarity opposite to the charge of the charged spray.   The charged spray adhesion preventing means according to any one of claims 2 to 5, wherein the potential applying means is configured to set the spray blocking means to a potential having the same polarity as the charge of the charged spray.   The said spray nozzle is a charge spray adhesion prevention means as described in any one of Claims 1-8 arrange | positioned so that a charge spray may be ejected in the horizontal direction with respect to the advancing direction of the said electrostatic spray apparatus.

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