CN201524624U

CN201524624U - Gas-liquid two phase coaxial inflow electrostatic atomization nozzle

Info

Publication number: CN201524624U
Application number: CN2009200474708U
Authority: CN
Inventors: 贾卫东
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2009-07-17
Filing date: 2009-07-17
Publication date: 2010-07-14
Anticipated expiration: 2019-07-17

Abstract

The utility model relates to an efficient and safe electrostatic nozzle applied to agricultural plant protection machines, in particular to a gas-liquid two phase coaxial inflow electrostatic atomization nozzle, which comprises an insulated nozzle seat, wherein an electrostatic device is disposed on the periphery of front section of the insulated nozzle seat; a whirling plate with liquid flow holes is arranged in the middle section of an inner cavity of the insulated nozzle seat; the rear section of the insulated nozzle seat is connected with a liquid inlet pipe through internal threads; a gas inlet pipe is arranged in the center of the liquid inlet pipe; the front end of the gas inlet pipe is fixed onto a chemical liquid distribution disc provided with liquid channels; and the chemical liquid distribution disc is engageably connected with the internal threads on the inner wall of the liquid inlet pipe through external threads on the periphery of the chemical liquid distribution disc. The gas-liquid two phase coaxial inflow electrostatic atomization nozzle can obtain stable gas-liquid two phase flow field structure, increase spray cone angles and improve atomization capacity, obtain good gas-liquid mixing effect and atomizing effect through adjustment, and have good electrostatic effect and high safety.

Description

The coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase

Technical field

The utility model relates to a kind of agricultural plant protection highly effective and safe type electrostatic atomiser mechanically that is applied to, and specifically is the coaxial electrostatic atomization nozzle that becomes a mandarin of a kind of gas-liquid two-phase.

Background technology

The electrostatic spray technology because of its improved soup on plant adhesion and deposition; improved the uniformity of pesticide spraying; reduce and drift about and increase operation rate, reduce the dispenser cost and reduce pollution on the environment, and obtain than extensive use at the agricultural plant protection mechanical field.The problem that is difficult to atomize at high adhering liquid also has application with the electrostatic atomization technology designed agricultural nozzle that combines with the twin technology.But existing two-fluid spray nozzle, (originate: Wang Xiaoying as shown in Figure 1, the cautious universe of sieve, Sha Yi, etc. the charged atomization characteristics of two-fluid spray nozzle. Jiangsu University's journal (natural science edition), 2007,28 (4): 328-331), its structure and charging modes have following deficiency: (1) gas is by axially entering nozzle, and soup is by tangentially entering nozzle, produce stronger turbulent eddy when gas-liquid two-phase mixes, thereby can not form stable gas-liquid two-phase flow field structure and then influence atomizing effect; (2) the gas blowout tubular axis can't be regulated to the position, can't in use regulate its best axial location according to physical condition, is difficult to obtain best atomizing effect; (3) mode that adopts outside, nozzle the place ahead to add electrostatic ring is charged, and owing to the exterior static ring is easy to be adhered to by soup when droplet passes through, and causes short circuit or high-voltage breakdown, and electrostatic efficiency and security are difficult to guarantee.

Summary of the invention

The technical problems to be solved in the utility model provides a kind ofly can obtain stable gas-liquid two-phase flow field structure, can improve spray cone angle and improve the atomizing ability, can obtain gas-liquid mixed effect and atomizing effect, the coaxial electrostatic atomization nozzle that becomes a mandarin of electrostatic efficiency gas-liquid two-phase good, high safety preferably by adjusting.

The coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase of the present utility model includes an insulation nozzle seat, insulation nozzle seat leading portion outer periphery is equipped with electrostatic equipment, insulation nozzle seat inner chamber stage casing is provided with the spinning disk with liquid flow hole, insulation nozzle seat back segment is connected with feed tube by internal thread, the feed tube center is provided with an air inlet pipe, the front end of air inlet pipe is fixed with a soup distributing disc, have fluid course on the soup distributing disc, the screw-internal thread fit on the inwall of the external screw thread of soup distributing disc by its outer rim and feed tube is connected.

It is on the circumference at center that a plurality of fluid courses on the described soup distributing disc are distributed in the air inlet pipe; Described fluid course has 6～8.

Described insulation nozzle seat periphery is with an insulating sheath, described electrostatic equipment is for adopting the device of condenser type charging modes, the induction electrode of electrostatic equipment is enclosed between insulating sheath and the insulation nozzle seat, is used for connecting the preformed hole that the binding post of lead and high-pressure electrostatic generation equipment passes on the insulating sheath and is connected on the induction electrode.

The rear end face of described spinning disk is provided with several eddy flow grooves along the liquid flow hole tangential direction.

Advantage of the present utility model is:

1, air inlet pipe and the coaxial installation of feed tube are easy to form stable gas-liquid two-phase flow field structure and obtain atomizing effect preferably.

2, according to the difference of the physical parameter of spray liquid, stream pressure, throughput, flow quantity, can regulate air inlet pipe in axial position by rotation air admission hole and soup distributing disc, thereby can obtain best gas-liquid mixed effect and atomizing effect.

3, adopt the electric capacity charging modes, induction electrode is installed on the insulation nozzle seat and is protected by insulation protective jacket, electrostatic efficiency guaranteed with and security strengthened.

Description of drawings

Fig. 1 is the two-fluid spray nozzle structure of prior art;

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is the end face structure schematic diagram of soup distributing disc;

Fig. 4 is the rear end face structural representation of spinning disk.

The specific embodiment

As shown in Figure 2, the coaxial electrostatic atomization nozzle that becomes a mandarin of the gas-liquid two-phase of the utility model embodiment comprises insulating sheath 1, induction electrode 2, binding post 3, insulation nozzle seat 4, spinning disk 5, feed tube 6, air inlet pipe 7, soup distributing disc 8, O RunddichtringO 9.

Described spinning disk 5 is positioned the interior step of insulation nozzle seat 4; and it is fixing by being threaded into insulation nozzle seat 4 backs by feed tube 6; the gap that insulation nozzle seat 4 and feed tube are 6 is by 9 sealings of O RunddichtringO; air inlet pipe 7 is coaxial with feed tube 6; the air inlet pipe front end is fixed with soup distributing disc 8; soup distributing disc 8 also can be regulated axial location by the turn mode by thread connection in feed tube 6 inside; described induction electrode 2 is positioned to fix by being threaded into insulation nozzle seat 4 backs on the insulation nozzle seat 4 and by insulation protective jacket 1, and binding post 3 is welded on the induction electrode 2 by the preformed hole on the insulating sheath 1.

After finishing with upper-part assembling, feed tube 6, air inlet pipe 7 and sprayer feed pipe and air supply pipe are coaxial is connected, binding post is connected with HV generator by lead.

Spinning disk 5 is circular, and there is liquid flow hole 51 at the center, along even 3 the eddy flow grooves 52 (as shown in Figure 3) that distribute of liquid flow hole tangential direction.

Air inlet pipe 7 and feed tube 6 are the two coaxial connection of stainless steel, adopt center air jet structure, and the air inlet pipe center is a gas channel, and on the soup distributing disc 8 of air inlet pipe front end, air inlet pipe is that the center is evenly distributed with 6 fluid courses 81 (as Fig. 4).According to the size adjustment air inlet pipe 7 of the physical parameter that sprays environment, soup, spray parameters, charging voltage and soup distributing disc 8 in axial position obtaining best atomizing effect, be the axial location of reference value adjustments air inlet pipe 7 and soup distributing disc 8 below 50 μ m as the mist droplet particle size in can the canopy chamber.

Induction electrode 2 is a ring-type, adopts copper material to process, and for the indoor sprinkling of canopy, size is decided to be internal diameter 12mm, external diameter is 14mm, width 2mm, and charging voltage is 1000～10000 volts.

Insulation nozzle seat 4 and insulation protective jacket 1 must be the high pressure resistant insulation materials, as the good high rigidity engineering plastics of insulating properties such as Teflon, polyvinyl chloride, nylon etc., to guarantee the security of induction charging effect and nozzle.

Claims

1. coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase, include an insulation nozzle seat (4), insulation nozzle seat leading portion outer periphery is equipped with electrostatic equipment, insulation nozzle seat inner chamber stage casing is provided with the spinning disk (5) with liquid flow hole (51), it is characterized in that: insulation nozzle seat (4) back segment is connected with feed tube (6) by internal thread, the feed tube center is provided with an air inlet pipe (7), the front end of air inlet pipe is fixed with a soup distributing disc (8), have fluid course (81) on the soup distributing disc, the screw-internal thread fit on the inwall of the external screw thread of soup distributing disc by its outer rim and feed tube is connected.

2. the coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase as claimed in claim 1 is characterized in that: it is on the circumference at center that a plurality of fluid courses (81) on the described soup distributing disc (8) are distributed in the air inlet pipe.

3. the coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase as claimed in claim 2, it is characterized in that: described fluid course (81) has 6～8.

4. the coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase as claimed in claim 1, it is characterized in that: described insulation nozzle seat (4) periphery is with an insulating sheath (1), described electrostatic equipment is for adopting the device of condenser type charging modes, the induction electrode of electrostatic equipment (2) is enclosed between insulating sheath (1) and the insulation nozzle seat (4), and the preformed hole that binding post (3) passes on the insulating sheath is connected on the induction electrode (2).

5. the coaxial electrostatic atomization nozzle that becomes a mandarin of gas-liquid two-phase as claimed in claim 1 is characterized in that: the rear end face of described spinning disk (5) is provided with several eddy flow grooves (52) along liquid flow hole (51) tangential direction.