CN2223133Y

CN2223133Y - Powder electrostatic spray dust precipitating and collecting apparatus

Info

Publication number: CN2223133Y
Application number: CN 95205538
Authority: CN
Inventors: 曾里敏
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-10
Filing date: 1995-03-10
Publication date: 1996-03-27
Anticipated expiration: 2005-03-10

Abstract

The utility model provides a powder electrostatic spray dust precipitating and collecting apparatus. The apparatus is composed of a dust collecting cover, two filter cores arranged in the dust collecting cover, an air channel connecting the filter cores and a centrifugal fan, an air exhausting box, and a reversal valve which can alternately close the air channel and air return ports, wherein, the air exhausting box is connected with the air outlet of the centrifugal fan, and the air exhausting box is provided with two air return ports and an air exhausting valve. Compared with the prior technology, the utility model has the advantages of simple structure, good dedusting effect, easy deashing removal, stable performance, convenient operation, etc; besides, the cleaned power materials can be recovered; the utility model is especially suitable for the uses of electrostatic spray operation and dust precipitating of the powder and the recovery of the power materials.

Description

A kind of electrostatic powder spraying dedusting and retracting device

The utility model belongs to cleaner, and particularly a kind of electrostatic powder spraying dedusting and retracting device are suitable for the electrostatic powder spraying operation.

In the prior art, three major types cleaners such as cyclone dust removal, bag-type dust and electrostatic precipitation are arranged.The advantage of cyclone dust removal is simple in structure, and the pressure loss is little, and is higher to the crude particle dust efficiency of dust collection, but deficiency is low to the particle dust efficiency of dust collection.The efficiency of dust collection height of bag-type dust, but life-span of the filter bag is short, and also deashing is relatively more difficult.The efficiency of dust collection of electrostatic precipitation is also than higher, and not enough is that investment is big.At present, the dust arrester that most common employing cyclone dust collectors of electrostatic powder spraying production line and sack cleaner combine, but still have following weak point: first Powder Recovery rate is not high, reason is that the powder that is attached on cloth bag and the cyclone dust collectors is difficult to remove clean, and spraying is often with the converting colors that needs of product, and the powder of different colours just can not be used once mixing again.Its in two this dust arrester pressure loss big, near workpiece, be difficult to produce enough negative pressure and make whole dust enter dust pelletizing system, cause dust to escape phenomenon and produce, still contaminated environment.It three is that the particle size distribution of powder is narrower, and good fluidity, and coherency and poor adhesive force are difficult to form stable bonding layer (adhesion layer) in cloth bag, reduced dust removing effects.

The purpose of this utility model is to provide a kind of good dedusting effect, Powder Recovery rate height, simple in structure and easy to operate electrostatic powder spraying dedusting and retracting device at the existing defective of dust arrester of existing electrostatic powder spraying operation.

Task of the present utility model realizes by this way; This dust arrester is made up of dust gathering arrester, filter core, air channel, centrifugal blower, air draft case, air bleeding valve and scavenging air valve, dust gathering arrester is an open-front, the casing that the bottom surface turns forward, two filter cores are placed side by side the rear portion in the dust gathering arrester, be communicated with the air inlet of centrifugal blower by two air channels, the air outlet of centrifugal blower is connected with the air draft case that air bleeding valve is housed, on the air draft case, also have two return air inlets that are communicated with two air channels, between two return air inlets and two air channels, respectively be provided with the reversal valve that alternately to close return air inlet and air inlet.

The utility model is work like this: disposal box of the present utility model is connected with the existing spray booth cover of user, during operation, open air bleeding valve earlier, the Rotation With Changing air valve makes it to close left and right two return air inlets, start centrifugal blower then, around filter core, just produce a negative pressuren zone this moment.When carrying out spraying operation, be adsorbed under the effect of electrostatic force on the opposite polarity workpiece from the electronegative coating particle of spray wheel ejection, and the coating particle that is not adsorbed is just run on the filter core of negative pressure, because filter core is to make with the ventilative material of high little density, coating particle is adsorbed on the filter core by obstruct, the air that purifies then enters filter core inside through left and right air channel and air inlet, drains into atmosphere through centrifugal blower, fumer and air bleeding valve again, thereby has realized the dedusting requirement.When the coating grain of cartridge surface absorption when many, rotatable one of them change-over valve makes it to close one of them air inlet duct, close air bleeding valve simultaneously, at this moment, the air that purifies is through fumer, return air inlet, blowback wind is carried out to corresponding that filter core in the air channel, its surperficial coating particle is come off, the part grain is in being sucted by another filter core, remaining is just fallen on the swash plate of disposal box bottom to fall to reclaim in the material collecting barrel along its gradient and uses, after this filter core is cleaned out, by same operation another filter core is carried out deashing, so hocket and just can finish deashing work.When changing the powder of different colours, only more renew cartridge just can.

From structure of the present utility model and operation principle as can be known, the utility model following advantage recklessly compared with the prior art.

1, simple in structure, to make easily, cost is low.

2, owing to can produce high negative near filter core, can prevent effectively that powder from escaping, and filter element filtering is effective, therefore efficiency of dust collection height of the present utility model can reach 99.8% after tested.

3, deashing work is easy, and need not shut down and carry out, and can boost productivity effectively.

4, Qing Li powder is recyclable, reduces production costs.

5, stable performance, running is reliable, and is easy to operate.

Followingly in conjunction with the accompanying drawings structure of the present utility model is further described.

Fig. 1 is the cutaway view of a kind of concrete structure of the utility model.

Fig. 2 is that the A of Fig. 1 is to view.

As shown in Figure 1, dust gathering arrester (1) is welded with metallic plate, and air channel (3) can be directly welded on the base plate of dust gathering arrester (1), and two filter cores (2) are socketed on the air channel (3), and the filtering material of filter core (2) can be made with highly effective air filter paper with gas turbine.For the ease of deashing, in filter core (2) upper end a montant (11) that passes outside the dust gathering arrester (1) is set, this montant (11) and one is shouldered bar (12) and is connected, shoulder bar (12) so that before blowback wind, shake earlier, make montant (11) drive filter core (2) and move up and down, allow the most of powder that invests on the filter core (2) come off on the base plate of dust gathering arrester (1) by vibration.Centrifugal blower (4) is arranged at dust gathering arrester (1) below, in the air inlet top of centrifugal blower (4) itself air collecting box (13) is set preferably, and two air inlets (5) corresponding with air channel (3) are opened on air collecting box (13).The air outlet (14) of centrifugal blower (4) is connected with air draft case (6), and exhaust valve (7) can be arranged on the rear portion or the both sides of air draft case (6).The air draft case is arranged at the back lower place of dust gathering arrester (1), allow and connect into a cavity between dust gathering arrester (1) base plate, air collecting box (13) upper surface, air draft case (6) inwall and two side plates, and establish a dividing plate (10) in the middle of the cavity and make it to be separated into two air channels, left and right air channel (3) only is communicated with corresponding left and right air inlet (5).Two return air inlets (9) are opened on the inwall of air draft case (6) corresponding to air inlet (5), and reversal valve (8) is the junction that the air door of a radial type is articulated in return air inlet (9) and air inlet (5), and handle by the handle (15) that stretches out the outside.

The utility model is particularly suitable for the electrostatic powder spraying operation and removes industry and reclaim the powder use.

Claims

1, a kind of electrostatic powder spraying dedusting and retracting device, it is characterized in that by Ju dust hood (1), filter core (2), air channel (3), centrifugal blower (4), air draft case (6), air bleeding valve (7) and scavenging air valve (8) are formed, dust gathering arrester (1) is an open-front, the casing that the bottom surface turns forward, two filter cores are placed side by side the rear portion in the dust gathering arrester, be communicated with the air inlet (5) of centrifugal blower (4) by two air channels (3), the air outlet (14) of centrifugal blower (4) is connected with the air draft case (6) that air bleeding valve (7) is housed, on air draft case (6), also have two return air inlets (9) that are communicated with two air channels (3), the reversal valve (8) that can alternately cut out return air inlet (19) and air channel (3) mouth respectively is set between two return air inlets (9) and air channel (3).

2, dedusting according to claim 1 and retracting device, the filtering material that it is characterized in that filter core (2) is the gas turbine air paper.

3, require 1 or 2 described dedusting and retracting devices according to uncle's profit, it is characterized in that also being provided with the montant (11) outside the extended dust gathering arrester (1) on filter core (2), this montant (11) and is shouldered bar (12) and is connected.

4, dedusting according to claim 1 and retracting device is characterized in that in air inlet (5) top of centrifugal blower (4) air collecting box (13) being set preferably, and open on air collecting box (13) in corresponding two air channels of two air inlets (5) (3).

5, dedusting according to claim 1 and retracting device, it is characterized in that connecting into a cavity between base plate, air collecting box (13) upper surface, air draft case (6) inwall and two side plates of dust gathering arrester (1), in the middle of cavity, establish a dividing plate (10) and make it to be separated into two air channels.

6,, it is characterized in that reversal valve (6) is a radial type air door, is articulated in the junction of return air inlet (9) and air inlet (5) according to claim 1 or 4 described dedusting and retracting devices.