JP2006095357A - Electrostatic spray nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic spray nozzle preventing electric shock accidents by making electrodes completely covered in a waterproof way and causing no drops of voltage due to leakage. <P>SOLUTION: In the nozzle, an electrode 14 is arranged in the vicinity of the spraying mouth 12a of the nozzle body 12 so that a fluid to be sprayed (b) of the ground electric potential is charged electrically with a high voltage applied by the electrode 14. A nonconductive cover 13 covering the outside of the nozzle body 12 consists of a cylindrical cover body 18 fixed to the side of the nozzle body 12 and a cylindrical tip cap 18 engaged externally in the tip side of the cover body 18. A cylindrically formed electrode 14 is laid between the engaging surfaces of the cover body 18 and the tip cap 19, and waterproof seals 20 are arranged on both sides of the electrode 14 held between the engaging surfaces of the cover body 18 and the tip cap 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrostatic spray nozzle used for spraying agricultural chemicals and the like.

  In spraying pesticides, etc., an electrode is placed near the spray port of the nozzle body, and a high voltage is applied to this electrode to charge the spray chemical solution at ground potential and improve the adhesion rate to crops. A spray nozzle is used.

  As shown in FIG. 2, the conventional electrostatic spray nozzle a has a cylindrical shape in which a cylindrical nonconductive cover 2 is attached to the outside of the spray port 1a of the nozzle body 1 and the cover 2 is fixed to the nozzle body 1 side. The cover main body 3 and a cylindrical tip cap 4 that is externally screwed onto the front end side of the cover main body 3 are formed, and the cover main body 3 is positioned so that the cylindrical electrode 5 is positioned around the front of the spray port 1a. The electrode 5 is fixed by screwing the tip cap 4 to the cover body 3, and an electric wire 6 for supplying a high voltage is connected to the electrode 5.

  When spraying the chemical solution from the spray port 1a of the nozzle body 1, the electrostatic spray nozzle a applies a high voltage from the outside to the electrode 5 through the electric wire 6 to charge the spray chemical solution b at the ground potential. Thus, the adhesion rate of the charged chemical solution b to the crop can be improved.

  By the way, in the above-described conventional electrostatic spray nozzle a, the electrode 5 is exposed on the inner peripheral surface of the cover 2 and is in a state of touching the human body. There is a fear.

  Further, since the electrode 5 is exposed on the inner peripheral surface of the cover 2, there is a risk of electric shock by touching water droplets even if the electrode 5 is not directly touched by being wet with the spray chemical b, There is a problem in that a phenomenon occurs in which a leakage occurs between the chemical liquid b and the electrode 5 and the voltage drops, and the effect of static electricity is lost.

  Therefore, an object of the present invention is to provide an electrostatic spray nozzle that can prevent an electric shock accident by making the electrode completely waterproof and concealed, and that does not cause a voltage drop due to leakage. is there.

  In order to solve the above problems, the invention according to claim 1 is an electrostatic spraying in which an electrode is disposed in the vicinity of a spray port of a nozzle body, and a ground potential spray fluid is charged by a high voltage from the electrode. In the nozzle, a configuration is adopted in which the electrode is concealed within the thickness of a non-conductive cover that covers the outside of the nozzle body and is stored in a waterproof state.

  According to a second aspect of the present invention, in the first aspect of the invention, the cover includes a cylindrical cover main body fixed to the nozzle main body side, and a cylindrical front end cap that is externally screwed onto the front end side of the cover main body. The above-mentioned electrode formed in a cylindrical shape is placed between the fitting surface of the cover body and the tip cap, and a waterproof seal is incorporated at positions on both sides of the electrode between the fitting surface of the cover body and the tip cap. Is adopted.

  According to a third aspect of the present invention, in the first aspect of the invention, the cover is formed in a cylindrical shape using a synthetic resin, and the electrode is embedded in the cover by molding.

  Here, an electric wire for supplying a high voltage is connected to the electrode provided in the cover, and a portion of the electric wire drawn out from the cover is stopped by a waterproof plug.

  According to the present invention, since the electrode is concealed within the thickness of the non-conductive cover that covers the outside of the nozzle body and stored in a waterproof state, the human body touches the cover by maintaining the insulating state of the electrode and preventing exposure to the outside. The risk of electric shock disappears even if you touch water drops.

  In addition, since the electrode is waterproof, it is in an electrically insulated state, and there is no possibility of a voltage drop due to leakage between the chemical solution and the electrode, so that the electrostatic effect can be reliably maintained.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

  As shown in the figure, the electrostatic spray nozzle A of the present invention covers the front outer side from the outer periphery of the spray port 12a to the nozzle body 12 that is attached to the tip of the spray pipe 11 connected to the chemical tank and sprays the chemical b. A non-conductive cover 13 is attached, and the electrode 14 located around the front of the spray port 12a is concealed in the thickness of the cover 13 so as to be waterproof, and an electric wire 15 for supplying a high voltage to the electrode 14 The portion of the electric wire 15 that is drawn out from the cover 13 is stopped by a waterproof plug 16.

  In the first embodiment shown in FIG. 1A, a cover 13 is fitted on the nozzle body 12 side and fixed with a screw 17 or the like, and on the distal end side of the cover body 18. The cover main body 18 and the front end cap 19 are made of synthetic resin as the material, and the cylindrically formed electrode 14 is connected to the cover main body 18 and the front end cap 19. A waterproof seal 20 such as an O-ring is incorporated at positions on both sides of the electrode 14 between the fitting surfaces of the cover body 18 and the tip cap 19 so that the electrode 14 is insulated and concealed in a waterproof state. It has become.

  The cover body 18 is provided with an insertion hole 21 for an electric wire 15 that is connected to the electrode 14 and supplies a high voltage. A portion of the electric wire 15 that is drawn out from the cover body 18 is stopped by a waterproof plug 16. Has been.

  In the second embodiment shown in FIG. 1B, the cover 13 is formed in a cylindrical shape using a synthetic resin, and the electrode 14 and the electric wire 15 connected thereto are embedded in the cover 13 by molding. The portion of the electric wire 15 drawn out from the cover 13 is stopped by a waterproof plug 16 and the electrode 14 is concealed in an insulated and waterproof state.

  The electrostatic spray nozzle A of the present invention is configured as described above, and when spraying the chemical liquid b in a state of being attached to the tip of the spray pipe 11, the spray chemical liquid b having the ground potential is applied by applying a high voltage to the electrode 14. The electrode 14 is concealed in an insulating and waterproof state so that even if the human body touches the cover 13 or touches water droplets, there is a risk of electric shock. Will disappear.

  Further, by making the electrode 14 waterproof, the electrode 14 does not get wet with the spray chemical liquid b, and the voltage does not drop due to electric leakage between the chemical liquid b and the electrode 14. Can be maintained.

(A) is a longitudinal front view showing the electrostatic spray nozzle of the first embodiment, (b) is a longitudinal front view showing the electrostatic spray nozzle of the second embodiment. Longitudinal front view showing a conventional electrostatic spray nozzle

Explanation of symbols

A Electrostatic spray nozzle 11 Spray pipe 12 Nozzle body 12a Spray port 13 Cover 14 Electrode 15 Electric wire 16 Waterproof plug 17 Screw 18 Cover body 19 Tip cap 20 Waterproof seal

Claims (3)

  In an electrostatic spray nozzle in which an electrode is disposed in the vicinity of the spray port of the nozzle body, and a ground potential spray fluid is charged by a high voltage from the electrode, the thickness of the non-conductive cover that covers the outside of the nozzle body An electrostatic spray nozzle characterized in that the electrode is concealed in a waterproof form.   The cover includes a cylindrical cover body that is fixed to the nozzle body side, and a cylindrical tip cap that is externally screwed onto the distal end side of the cover body. The cylindrically formed electrode is connected to the cover body and the distal end. The electrostatic spray nozzle according to claim 1, wherein a waterproof seal is incorporated at positions on both sides of the cap between the fitting surfaces of the cap and between the fitting surface of the cover body and the tip cap. .   The electrostatic spray nozzle according to claim 1, wherein the cover is formed in a cylindrical shape using a synthetic resin, and the electrode is embedded in the cover by molding.

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