Low-cost intelligent integrated spraying pressure and flow detection device and method

Patent metadata

Field	Value
Publication number	US-11618047-B2
Application number	US-202117604445-A
Country	US
Kind code	B2
Filing date	Apr 13, 2021
Priority date	Jun 22, 2020
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

The present invention provides a low-cost intelligent integrated spraying pressure and flow detection device and method. The low-cost intelligent integrated spraying pressure and flow detection device includes an intelligent integrated pressure and flow detection device, a control unit and a calibration system. The intelligent integrated pressure and flow detection device is a device which integrates a pressure detection unit and a flow detection unit and is configured to detect pressure and flow. The control unit is connected to the intelligent integrated pressure and flow detection device and the calibration system. The calibration system is configured to simulate a working condition of the intelligent integrated pressure and flow detection device during field work.

First claim

What is claimed is:

1. An integrated spraying pressure and flow detection device, comprising an integrated pressure and flow detection unit, a control unit and a calibration system, wherein the integrated pressure and flow detection unit is a device configured to detect a pressure and a flow of a sprayer; and the control unit is connected to the integrated pressure and flow detection unit and the calibration system, and under an action of the control unit, the calibration system is configured to simulate changes in working parameters of the integrated pressure and flow detection unit during a field work,
wherein the integrated pressure and flow detection unit comprises an integrated pressure and flow detection device housing, expansion rings, front and rear guide elements, ball bearings, bearings, a preamplifier, a shaft, an impeller, a CYT 101 pressure transmitter and connecting holes; and
the integrated pressure and flow detection device housing has a tubular shape in a left-right symmetry and comprises flanges respectively formed on two ends thereof, and the flanges at the two ends are connected to a boom sprayer pipeline, end surfaces of the flanges at the two ends are respectively formed with annular rectangular grooves for mounting the expansion rings and the front and rear guide elements, and a boss is provided on an outer housing circumference of an end surface of the integrated pressure and flow detection device housing, the boss is threadedly connected to the pressure transmitter, and the preamplifier is threadedly connected to a middle position directly under the integrated pressure and flow detection device housing; top portions of the front and rear guide elements are respectively provided with circular cones which are axially opposite to each other and configured for mounting the bearings and the ball bearings, a cylindrical bottom of each of the circular cones is formed with two coaxial stepped holes which are a first stepped hole and a second stepped hole, wherein the first stepped hole is in interference fit with an outer race of a respective one of the bearings, and the second stepped hole is in clearance fit with a respective one of the ball bearings; an end of each of the ball bearings is in contact with an end of the shaft to bear an axial force generated when the impeller is driven by a liquid to rotate; an inner bore of each of the bearings is in clearance fit with the shaft so that the shaft is configured for rotating along a circumferential direction; and the shaft is a stepped shaft and comprises a step portion which is in transition fit with an inner bore of the impeller.

2. The integrated spraying pressure and flow detection device according to claim 1 , wherein the expansion rings each are made of bronze and have a beveled edge, the expansion rings are respectively mounted in the formed grooves on left and right sides of the housing, the expansion rings each have an end surface fitting to a respective one of the formed grooves and the other end surface fitting to an end surface at a bottom of a respective one of the front and rear guide elements, and the expansion rings are configured to expand to form a seal, so that the front and rear guide elements fit to surfaces of the formed grooves, respectively, to prevent the front and rear guide elements from undergoing axial movement during operation.

3. The integrated spraying pressure and flow detection device according to claim 1 , wherein the front and rear guide elements are made of a non-magnetically-conductive aluminum alloy by casting, and are distributed at two ends of the shaft, and are each in a shape of an annular cylindrical hole, a top of the annular cylindrical hole is provided with a respective one of the circular cones which is coaxial with the annular cylindrical hole and fixed by an upper support column and a lower support column, and the annular cylindrical hole, the respective one of the circular cones, the upper support column and the lower support column are integrally cast.

4. The integrated spraying pressure and flow detection device according to claim 1 , wherein the first stepped hole has a diameter of 10 mm and a depth of 10 mm, the second stepped hole has a diameter of 9 mm and a depth of 4 mm, and while keeping a cylindrical part of each of the circular cones unchanged, an excess material is removed from a conical part of each of the circular cones during casting to reduce a weight of the integrated pressure and flow detection unit.

5. The integrated spraying pressure and flow detection device according to claim 1 , wherein the preamplifier comprises a permanent magnet, an iron core, a coil, and an amplifying and shaping circuit which are integrally packaged, the preamplifier is connected to the integrated pressure and flow detection device housing through M15 threads in a middle of a bottom surface of the housing, and outputs, through a lead, electrical signals generated by periodically cutting magnetic lines of force, and four pins at a bottom end of the packaged preamplifier respectively correspond to a signal output, a power input, a shielding grid and an amplifier ground wire.

6. The integrated spraying pressure and flow detection device according to claim 1 , wherein the control unit comprises a controller, an analog quantity acquisition module, a USB flash drive, a touch screen, a DC boost module and a 12V DC power supply; and the controller is connected to the analog quantity acquisition module, the touch screen and the DC boost module, the analog quantity acquisition module is connected to a pressure detection unit and a flow detection unit, the touch screen is connected to the USB flash drive, and the DC boost module is connected to the 12V DC power supply.

7. The integrated spraying pressure and flow detection device according to claim 1 , wherein the calibration system comprises a one-way valve, a filter, a flow regulating valve, a proportional relief valve, a pressure regulating valve, a pump, a water tank, a nozzle, a solenoid valve, a measuring cylinder and an electronic balance;
the proportional relief valve, the pressure transmitter, the pump, the flow regulating valve and the solenoid valve are all connected to the control unit;
the water tank comprises a water outlet and a reflux inlet respectively provided at a bottom thereof and at a predetermined height position on a side thereof, and comprises a water feeding port provided right in a middle of a top thereof; the water tank is connected to a liquid inlet of the pump through the water outlet at the bottom, the filter is disposed between the water outlet at the bottom of the water tank and the pump, and the water tank is connected to the proportional relief valve through the reflux inlet on the side; a liquid outlet of the pump is connected to an end of the proportional relief valve and the pressure regulating valve respectively by pipelines; the pressure regulating valve is connected to a valve end of the flow regulating valve, and the pressure regulating valve is configured to control a pressure difference between the proportional relief valve and the flow regulating valve and keep a pressure of a liquid outputted from a fixed-difference relief valve at a constant value; the flow regulating valve is connected to the one-way valve; and a water inlet end of the integrated pressure and flow detection unit is connected to the pressure transmitter and the one-way valve, the other end of the integrated pressure and flow detection unit is connected to the solenoid valve, the solenoid valve is connected to the nozzle in series, the controller is configured to switch the solenoid valve on or off at a high speed to control a working status of the nozzle, the nozzle operates when the solenoid valve is switched on; the nozzle stops operating

Assignees

• Univ Jiangsu

Inventors

• Li Jinyang
• Chen Yunfei

Classifications

• G01F1/115

  with magnetic or electromagnetic coupling to the indicating device · CPC title

• B05B12/085 Primary

  responsive to flow or pressure of liquid or other fluent material to be discharged (B05B1/3006, B05B1/323 take precedence; spray pistols designed to control volume of flow with the controlling means being fluid actuated B05B7/1254) · CPC title

• B05B12/006 Primary

  Pressure or flow rate sensors · CPC title

• B05B1/30

  designed to control volume of flow, e.g. with adjustable passages {(B05B11/0094 takes precedence)} · CPC title