Induction device for electrostatic spray nozzle assembly

Patent metadata

Field	Value
Publication number	US-12350698-B2
Application number	US-202017425573-A
Country	US
Kind code	B2
Filing date	Jan 24, 2020
Priority date	Jan 25, 2019
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

An induction device for electrification of droplets of hydraulic nozzles comprises: an electrode comprising one or more attachment legs; and an induction electrode holder configured to receive the electrode, wherein the one or more attachment legs are fixed within tubular structures of the induction electrode holder, and wherein a finite distance is formed between an outer surface of each attachment leg in the one or more attachment legs and an inner surface of each tube of the tubular structures.

First claim

The invention claimed is:

1. An induction device for electrification of droplets of a hydraulic nozzle, the nozzle discharging the droplets in a spray pattern, the induction device comprising:
an electrode comprising one or more attachment legs and a transverse portion electrically exposed to the discharging droplets of the spray pattern, the transverse portion extending transversely relative to the one or more attachment legs and extending in a plane co-planar with a cross-sectional plane of the spray pattern; and
an induction electrode holder configured to receive the electrode, wherein the one or more attachment legs each have a first leg end that is fixed within corresponding one or more tubular orifices of the induction electrode holder, each tubular orifice being open at a first end with the corresponding attachment leg extending in a longitudinal direction from the first leg end through the open first end with an open space defined by the open first end of the tubular orifice surrounding the respective attachment leg where the attachment leg exits the first end of the tubular orifice, and wherein a finite distance is formed between an outer surface of each attachment leg in the one or more attachment legs and an inner surface of each of the tubular orifices in which the one or more attachment legs are fixed, the finite distance defining a gap between the outer surface of each attachment leg and the inner surface of the corresponding tubular orifice at the open first end of the corresponding tubular orifice;
wherein the finite distance and the gap are large enough to prevent a formation of continuous liquid film;
wherein the one or more attachment legs each have a respective terminal second leg end that is spaced further in the longitudinal direction from the first leg end than the open first end of the tubular orifice.

2. The device according to claim 1 , wherein:
the transverse portion of the electrode has an annular shape.

3. The device according to claim 2 , wherein:
a ring diameter of the transverse portion of the electrode varies between 15 mm and 70 mm.

4. The device according to claim 1 , wherein:
the transverse portion of the electrode comprises two parallel rods.

5. The device according to claim 4 , wherein:
spacing between the rods varies between 15 mm and 70 mm.

6. The device according to claim 1 , wherein:
a voltage on the electrode varies between 0.1 kV to 20 kV.

7. The device according to claim 1 , wherein the induction electrode holder comprises dielectric material.

8. The device according to claim 1 , wherein a cable connector is arranged at a second end opposite the open first end of one of the one or more tubular orifices.

9. A hydraulic spray nozzle assembly comprising:
a spray nozzle configured to spray liquid as a thin sheet in a discharge direction in a spray pattern, the thin sheet further breaking into liquid droplets;
an electrode comprising one or more attachment legs and a transverse portion electrically exposed to the discharging liquid droplets, the transverse portion extending transversely relative to the one or more attachment legs and extending in a plane co-planar with a cross-sectional plane of the spray pattern, the electrode configured to induce charge in the liquid droplets; and
an induction electrode holder comprising one or more tubular orifices, the induction electrode holder configured to receive the electrode, wherein the one or more attachment legs each have a first leg end that is fixed within the one or more tubular orifices, each tubular orifice being open at a first end with the corresponding attachment leg extending in a longitudinal direction from the first leg end through the open first end with an open space defined by the open first end of the orifice surrounding the respective attachment leg where the attachment leg exits the first end of the tubular orifice, and wherein a finite distance is formed between an outer surface of each attachment leg in the one or more attachment legs and an inner surface of each of the one or more tubular orifices in which a corresponding attachment leg is received, the finite distance defining a gap between the outer surface of each attachment leg and the inner surface of the corresponding tubular orifice at the open first end of the corresponding tubular orifice;
wherein the finite distance and the gap are large enough to prevent a formation of continuous liquid film on the electrode, the induction electrode holder, or the spray nozzle;
wherein the one or more attachment legs each have a respective terminal second leg end that is spaced further in the longitudinal direction from the first leg end than the open first end of the tubular orifice.

10. The hydraulic spray nozzle assembly according to claim 9 , wherein the transverse portion of the electrode has an annular shape.

11. The hydraulic spray nozzle assembly according to claim 10 , wherein a diameter of the annular shape varies between 15 mm and 70 mm.

12. The hydraulic spray nozzle assembly according to claim 9 , wherein the transverse portion of the electrode comprises two parallel rods.

13. The hydraulic spray nozzle assembly according to claim 12 , wherein spacing between the rods varies between 15 mm and 70 mm.

14. The hydraulic spray nozzle assembly according to claim 9 , wherein a cable connector is arranged at a second end opposite the open first end of one of the one or more tubular orifices.

Assignees

• Spraying Systems Co
• Embrapa

Inventors

• Ribeiro Da Rocha Edson Francelino

Classifications

• B05B5/043

  using induction-charging · CPC title

• B05B1/04

  in flat form, e.g. fan-like, sheet-like · CPC title

• B05B5/0533

  Electrodes specially adapted therefor; Arrangements of electrodes · CPC title

• B05B5/0536 Primary

  Dimensional characteristics of electrodes, e.g. diameter or radius of curvature of a needle-like corona electrode · CPC title

• A01M7/0089 Primary

  Regulating or controlling systems (the delivery being related to the movement of a vehicle B05B9/06) · CPC title