CN2170619Y

CN2170619Y - Diversion type dc electrostatic eliminator

Info

Publication number: CN2170619Y
Application number: CN 93238077
Authority: CN
Inventors: 徐国忠; 张春台
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-19
Filing date: 1993-01-19
Publication date: 1994-06-29
Anticipated expiration: 2003-01-19

Abstract

The utility model relates to a diversion type dc electrostatic eliminator, wherein, a voltage boosting rectification discharging circuit which is composed of two sets of oppositely independent voltage boosting transformers and rectifying devices of the independent voltage boosting transformers is coupled with an exciting circuit; two corona dischargers are respectively connected with the opposite electrode ends of the voltage boosting rectification discharging circuit and the exciting circuit; a current display device is connected in front of at least one discharger. The diversion type dc electrostatic eliminator can display that whether an outside object is provided with static electricity or not and can display the polarity and the strength of the electrostatic charge; thereby, the diversion type dc electrostatic eliminator can automatically adjust the polarity and the magnitude of discharge current.

Description

Diversion type dc electrostatic eliminator

The utility model relates to a kind of once-through type Xelminator of eliminating article institute static electrification.

In producing product such as paper, plastics, rubber, textile and Chemical Manufacture, regular meeting makes product or articles for use, equipment produce static, causes influencing production efficiency, reduces product quality even causes many unnecessary troubles such as serious accident.For eliminating the static on the article, often need to use Xelminator.Wherein a kind of is the ac high-voltage discharge-type, alternately produce negative ions by a pin type discharger, but negative ions is big in the compound probability in space, and the electrical efficiency that disappears is low.Be the raising electrical efficiency that disappears, adopt the rising operating voltage to increase the method for discharging current usually, the ozone growing amount is increased severely, and the high pressure winding of step-up transformer is also easily breakdown and damage.In addition, employed another kind of Xelminator is as " the once-through type Xelminator that static practical technique handbook is introduced, its principle as shown in Figure 1.Can know by Fig. 1 and to find out, in this Xelminator, high-voltage ac power becomes the electrion voltage of direct current through comprising the rectification discharge circuit that boosts of step-up transformer and rectifying device, then a pair of corona discharger is connected in same high direct voltage electrode tip.Two discharger alternating discharges during work.Electrical efficiency is higher though it disappears, owing to work under the high voltage all the time, so still have and the above-mentioned similar shortcoming of Xelminator that exchanges.

The purpose of this utility model provides a kind of dc static arrester of efficient energy-saving, makes two electrodes produce positive negative corona discharge respectively.When external object is not charged, only between positive and negative discharger, produce faint corona discharge with low voltage.And when external object is charged, can according to electrically charged polarity and current potential height change the polarity of external discharge charge automatically and regulate the discharging current size.The further purpose of the utility model provides a kind of once-through type Xelminator that can demonstrate external object institute static electrification charge polarity and the high low-function of current potential that has.

Xelminator of the present utility model has exciting circuit equally and comprises step-up transformer and the high voltage discharge circuit of rectifying device.The rectification discharge circuit should be two separate covers but this boosts, the formula that specifically forms can be two loops fully independently, and the secondary winding that also can take to be coupled with exciting circuit is formed more easy the forming in two loops by the two relatively independent symmetric windings that middle ground became.And then a pair of corona discharger is connected in the boost different in nature electrode tip of rectification discharge circuit of this two cover respectively.Different in nature electrode tip owing to sparking electrode being connected in DC circuit can carry out corona discharge simultaneously so the characteristics of this structure are exactly positive and negative electrode.In experiment, can observe, when all being connected with the electric current display unit before two sparking electrodes, if near the static electrification not of the object the sparking electrode then only carries out corona discharge between two positive and negative sparking electrodes, discharging current in two discharge loops is little and be bordering on equally, for example can only be 10 μ A; When object has positive charge, electric current display unit in the positive discharge loop demonstrates that discharging current reduces even is zero, and the electric current display unit in the negative discharge loop demonstrates the discharging current increase, show have in the diffluence of the negative ion electrospray of shunting and object with positive charge, under the situation that relative position is determined, the ratio that the increment of discharging current and shunt current account for discharging current depends on the current potential height of external object institute static electrification.Otherwise if external object is electronegative, the discharging current of negative discharge device reduces, and the discharge stream of positive discharge device increases.This phenomenon shows, at least after being connected with the electric current display unit before the discharger, promptly can know to demonstrate external object whether charged and charged polarity of institute and current potential height easily.This is difficult to realize in present Xelminator, and can becomes a kind of new method that high pressure detects.

The symmetry of discharging current when adjusting corona discharge between the positive and negative polarities discharger can adopt respectively the exciting circuit with two cover corresponding two independences of step-up transformer and scalable frequency and/or amplitude.

Below structure of the present utility model is described, but the included scope of the utility model theme is not limited only to this example with example shown in the drawings.

The existing Xelminator schematic diagram of Fig. 1

The circuit structure diagram of Fig. 2 the utility model Xelminator

As shown in the figure, the exciting circuit 1 of this Xelminator and 2 is two independences and amplitude and the adjustable respectively element circuit of frequency, for example can be square-wave generator commonly used and power amplifier formation.Constitute relatively independent two step-up

transformers

3,4 respectively with two symmetrical secondary winding of its direct coupling and middle ground, and form two relatively independent cover high-voltage rectifying discharge circuits through rectifying device 5 and 6 respectively.Different in nature electrode tip at two circuit respectively connects a pin type corona discharger 9 and 10, and its spacing adjustment is suitable.Be connected with a discharging current display unit 7 and 8 in the circuit before two corona dischargers respectively.During use, can make discharging current symmetry by adjusting two exciting circuits by positive and negative two dischargers shown in electric current display unit 7 and 8, in external object 11 is in the working range of Xelminator, variation and increase and decrease situation by electric current display unit 7 and the 8 positive and negative two discharger discharging currents that show, whether charged, and charged polarity of institute and power if can understand external object 11.Just because of the size of positive and negative two discharger discharging currents in the utility model Xelminator and polarity can be with external object the whether charged and electrically charged polarity of institute and strong and weak what adjust automatically, the compound probability of negative ions that the utility model uses is little, the electrical efficiency that disappears height.And because of operating voltage is low, the life-span of high-tension transformer prolongs, and the ozone amount of generation also can significantly reduce.

Claims

1, a kind of with the dc static arrester that connects with corona discharger behind the rectification discharge circuit that boosts of pumping signal through including step-up transformer and rectifying device, what it is characterized in that being coupled with exciting circuit is that two covers include separately step-up transformer (3), (4) and the relatively independent rectification discharge circuit that boosts of rectifying device (5), (6) accordingly, and a pair of corona discharger (9), (10) are connected in the two different in nature electrode tips that boost the rectification discharge circuit respectively.

2, Xelminator as claimed in claim 1 is characterized in that being connected with electric current display unit (7) or (8) at least in a corona discharger (9) or (10) circuit before.

3, Xelminator as claimed in claim 1 or 2 is characterized in that step-up transformer (3) in the relatively independent rectification discharge circuit that boosts of the cover of two after the said exciting circuit and (4) are to be coupled with pumping signal and the symmetric winding form of middle ground.

4, Xelminator as claimed in claim 1 or 2, it is characterized in that with said two step-up transformers (3) and (4) corresponding respectively be relatively independent exciting circuit (1) and (2) of two covers.