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A pressure stabilizing and filtering device for pwm variable spray

A technology of filtering device and voltage stabilizing device, which is applied in the direction of injection device, filtration separation, fixed filter element filter, etc., which can solve the problems of poor voltage stabilizing effect, increased risk of mist drift, mixed impurities, etc., to improve spray pressure , good filtering effect, good effect of automatic adjustment

Active Publication Date: 2019-07-12
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the high-speed solenoid valve is turned on and closed, there are large pressure fluctuations in the spraying circuit of the liquid medicine, which leads to poor droplet size distribution, increased risk of droplet drift, and uneven distribution of liquid spray droplets on the leaf surface. Uniformity and other problems that are not conducive to spray stability
At present, the existing PWM variable spray mainly uses the overflow device and the accumulator to stabilize the pressure of the liquid spraying circuit between the medicine tank and the solenoid valve, the structure is complex and the voltage stabilization effect is poor.
Moreover, the arrangement of the liquid medicine filter is concentrated between the medicine box and the solenoid valve. Due to the harsh working environment and the long-term work of the hydraulic components of the agricultural sprayer, impurities are likely to be mixed in the liquid medicine spraying circuit, resulting in The blockage of the nozzle makes the equipment unable to spray normally

Method used

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  • A pressure stabilizing and filtering device for pwm variable spray
  • A pressure stabilizing and filtering device for pwm variable spray
  • A pressure stabilizing and filtering device for pwm variable spray

Examples

Experimental program
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Effect test

Embodiment 1

[0025] refer to figure 1 and figure 2 , the present embodiment relates to a pressure stabilizing and filtering device, including a connecting body 1 and a detachable and sealingly mounted pressure stabilizing device 2 and a filtering device 3 on the connecting body 1, the inlet of the filtering device 3 is externally connected to the medicinal liquid, the The outlet and the voltage stabilizing device 2 communicate with the connecting body 1; the voltage stabilizing device 2 includes a mounting seat 21 and a slide bar 22, an elastic member 23 and a sealing member 24 arranged in the mounting seat 21, and the mounting seat 21 and the The connecting body 1 is sealed and connected, the sliding rod 22 is slidably installed in the mounting seat 21, and the two ends of the elastic member 23 are respectively connected with the sliding rod 22 and the mounting seat 21 to press the sliding rod 22 Sliding; the sliding rod 22 is in sealing connection with the mounting seat 21 through a se...

Embodiment 2

[0036] This embodiment is based on Embodiment 1, and as an improvement to the seal 24, the seal 24 is a seal ring, and an annular groove is opened on the outer surface of the slide rod 22, and the seal ring is sleeved on the ring In the groove, the sliding rod 22 is sealingly connected with the inner wall of the mounting base 21 through a sealing ring. The sliding rod 22 is sealed and connected with the inner wall of the mounting seat 21 through the sealing member 24. When the sliding rod 22 slides, it can prevent the liquid medicine from entering the cavity formed between the sliding rod 22 and the mounting seat 21, thereby ensuring that the sliding rod 22 It can slide smoothly in the mounting seat 21 without being hindered by the liquid medicine.

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Abstract

The invention discloses a voltage stabilizing and filtering device for a PWM variable spray. The voltage stabilizing and filtering device comprises a connecting body, a voltage stabilizing unit and a filtering unit. The voltage stabilizing unit and the filtering unit are installed on the connecting body detachably in a seal mode. An inlet of the filtering unit is externally connected with chemical liquid. An outlet of the filtering device and the voltage stabilizing unit communicate with the connecting body. The voltage stabilizing unit comprises an installing seat, a sliding rod, an elastic part and a seal part, and the sliding rod, the elastic part and the seal part are arranged in the installing seat. The installing seat is in seal connection with the connecting body. The sliding rod is slidably installed in the installing seat. The two ends of the elastic part are connected with the sliding rod and the installing seat to push and press the sliding rod to slide. The sliding rod is in seal connection with the installing seat through the seal part. The voltage stabilizing and filtering device has the beneficial effects that structure is simple, automatic voltage stabilizing is achieved, and filtering effect is good.

Description

technical field [0001] The invention relates to a pressure stabilizing and filtering device, in particular to a pressure stabilizing and filtering device for PWM variable spraying. Background technique [0002] PWM variable spray is a device that changes the spray time. By adjusting the duty cycle and frequency of the PWM signal, it controls the conduction and closure of the high-speed solenoid valve, and then realizes the adjustment of the spraying flow rate and the distribution of the droplet deposition. However, when the high-speed solenoid valve is turned on and closed, there are large pressure fluctuations in the spraying circuit of the liquid medicine, which leads to poor droplet size distribution, increased risk of droplet drift, and uneven distribution of liquid spray droplets on the leaf surface. Uniformity and other problems that are not conducive to spray stability. At present, the existing PWM variable spray mainly uses the overflow device and the accumulator to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05B12/08B05B15/40B05B15/50B01D29/56B01D29/96
CPCB01D29/56B01D29/96B05B12/085
Inventor 李君马亚坤王浩钟志清柏元强荀露梁鑫
Owner SOUTH CHINA AGRI UNIV
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