JPS58219957A - Electric dust collecting apparatus - Google Patents

Abstract

PURPOSE:To carry out dust removal at an electrode part simply in good efficiency without stopping the operation of a dust collecting apparatus, by a method wherein the electrode part of a primary dust collecting chamber is constituted from a circular or a polygonal discharge electrode and a dust collecting electrode in mutually opposed relation to each other and both electrodes are periodically or continuously rotated. CONSTITUTION:When the motor 5 of an electric dust collecting apparatus is started to rotate a dust sucking fan 4, fume dust and oil mist (fume mist) coming from a dust generating source is sucked into a primary dust collecting chamber 1 from a dust sucking port 1a thereof and, when passed between a discharge electrode 2A and a dust collecting electrode 2B constituting an electrode part 2, sucked to the side of a second dust collecting chamber 3 while charged to be coagulated and grown to coarse particles to be collected by a bag filter 6. In this case, the fume mist adhered to and accumulated on the electrodes 2A, 2B are shaken off and removed by centrifugal force generated through the continuous or periodical rotation of the electrodes 2A, 2B. Therefore, an ignition accident due to the accumulation of the fume mist can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric industry III for collecting fume and oil mist generated during arc welding, etc., and in particular, for collecting fume dust generated during carbon dioxide welding. In order to prevent ignition of flammable fume containing oil mist, the fume dust and oil mist that have adhered to or aggregated on the dust collection electrode are removed regularly or continuously.
This invention relates to an electrostatic precipitator equipped with a cleaning function.

As a method of collecting fine fume dust, an electrostatic precipitator is widely used in which the fume dust is made coarse and resistant to adhesion to the electrode part, or is electrostatically aggregated, and then collected in a bag filter. When the fume dust that is attracted to the discharge electrode and dust collection electrode that make up the electrode section sticks and accumulates, it causes spark discharge and causes the leakage of oil, resin, etc.
If the easily flammable carbon fume containing carbon ignites and is sucked into the bag filter, there is a danger that the bag filter will catch fire, so it was necessary to remove the fume dust that adhered to and accumulated on the electrodes.

However, since the electrode part is complicatedly constructed with discharge wires, dust collecting electrode plates, etc., the dust removal work is extremely complicated and easy to neglect, and there are many problems in which dust removal is incomplete due to busy schedules. (Therefore, the present applicant first applied for the
- In the invention of No. 194222, the dust collection operation was stopped once every few hours, and the dust removal brush was activated to clean the electrode part before the next dust collection operation could be started. We proposed a cleaning device for dust collection electrodes and succeeded in solving the above problem. However, with this cleaning device, the operation of the dust collector must be stopped for a certain period of time to remove dust, so there are problems with work efficiency, such as having to stop work such as welding during this time, and who is responsible for handling the dust removal brush each time. There remains the problem of inefficient operation, in which dust cannot be removed from the electrode section and the dust collector cannot be restarted unless this operation is performed.In addition, cleaning with a dust removal brush has low dust removal efficiency, and it is difficult to operate the handle accurately. Otherwise, there would be a problem that dust would be removed unevenly and fume dust would adhere to and remain on the electrode portion.

Therefore, the present invention is an electrostatic precipitator developed to solve the above-mentioned problems, and its purpose is to remove dust from the electrode part extremely easily and efficiently without stopping the operation of the precipitator. The purpose of the present invention is to provide an electrical industry M device devised in the following manner, and in order to achieve this object, the present invention includes an electrode portion composed of a circular or polygonal discharge electrode body and a dust collecting body facing each other. However, by rotating these regularly or continuously, the fume dust that has adhered or accumulated is removed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, there are two types of electrostatic precipitators: electrostatic agglomeration type dust collectors that charge static electricity to fume dust, aggregate it, and collect it on a bag filter; Part 2 of an electrostatic precipitator that periodically shakes off dust and collects it in a bag filter.
Although there are different types of dust collectors, all of them have the same basic structure, and the present invention can be implemented with exactly the same structure. The explanation of is omitted.

FIG. 1 and FIG. 2 show an electric sag according to a first embodiment of the present invention.
s is a front view and a side view showing the whole of s, and in the figure, the part indicated by reference numeral 1 is equipped with an electrode part 2 inside, and
Primary dust collection chamber with dust suction port 1a on the top (electrostatic coagulation*>
The interior is divided into two upper and lower chambers, a clean chamber 3a and a dust chamber 3b, and the clean chamber 3a is equipped with a motor 5 equipped with a dust suction fan 4, and the dust chamber 3a is also generally indicated by the reference numeral 3. The chamber 3b is a secondary dust collection chamber (bag filter dust collector) provided with a plurality of bag filters 6, and this electrostatic agglomeration type dust collector has the above-mentioned results in the dust I/chamber 3b of the secondary dust collection chamber 3. It is constructed by connecting the dust chambers 1 in a communicating state. In the illustrated embodiment, a communication port 1b is opened in the lower side of the primary dust collection chamber 1 as shown in FIGS. 3 and 4, and this communication port 1b is connected to the dust chamber 3b of the secondary VP dust chamber 3. By connecting directly to an open connection port (not shown), -
Although the resultant dust chamber 1 and the dust chamber 3b are connected, there are cases where they are separated and connected by means of a dust I, etc.

In the dust collector configured as described above, when the motor 5 is started and the dust suction fan 4 is rotated, the fume dust and oil mist (hereinafter referred to as fume mist) sent from the dust source (welding source) are first collected. The dust is sucked into the primary dust collection chamber 1 through the dust suction port 1a, and relatively coarse dust is dropped into the baffle box 9 shown in FIGS. The dust is charged, agglomerated, and coarsened before being collected in the bag filter 6 of the secondary dust collection chamber 3.
The explanation will be based on the descriptions in FIGS.

FIGS. 3 and 4 are enlarged views showing the first embodiment of the primary dust collection chamber 1, and the electrode section 2 shown here is a discharge electrode having a generally circular umbrella shape as a whole. It is composed of a body 2A and a dust collecting electrode body 2B, and in particular, the discharge electrode body 2A has a plurality of ventilation holes 2A' . built on a bone frame structure, and
A large number of discharge plates 2a are vertically disposed downward on the bottom surface of the discharge electrode body 2A. Each discharge plate 2a is made in the form of a strip having a bent mounting part 2al with a screw hole at the upper end, and the bent mounting part 2a1 has mounting screw holes 2A1 bored in the discharge electrode body 2A. It has a structure in which it protrudes from the bottom side of the discharge electrode body 2A by aligning it with one of the screws 2A2 and fixing it with the screw 2A2, but this is just an example of implementation, and the discharge Board 2a...
If the discharge plate 2a is attached by welding, or by forming a number of cuts in the discharge electrode body 2A and bending them to the bottom side,
Various embodiments can be considered for forming the discharge plate 2a, such as the case where the discharge plate 2a is formed.

Further, the dust collection j-rolling body 2B is formed into a circular shape with a substantially umbrella shape as a whole, and depending on the case, it may be possible to coat the surface with vinyl or the like to enhance the releasability of hume/mist. Incidentally, the above-mentioned discharge electrode body 2A and dust collection electrode body 2B are both formed into a substantially umbrella-shaped circle,
Sometimes it is made into a polygonal shape.

Next, in FIGS. 3 and 4, 12 is a motor for the electrode section 2 installed in the bottom chamber 1C of the primary dust collection chamber 1; The above-mentioned discharge electrode body 2A and dust collection electrode body 2B are mounted on the rotating shaft 12a of the motor 20, which protrudes above the dust suction passageway in the upper and lower tiers, with the discharge electrode body 2A and the dust collection electrode body 2B facing each other. The space between them is insulated by an insulating tube 13 fitted onto the rotating shaft 12a. Incidentally, electric terminals (not shown) are connected to the discharge electrode body 2A and the dust collection electrode body 2B, respectively.

2B, and the motor 12 is driven continuously or periodically by a control circuit (not shown) depending on the condition of the beam mist being firmly attached to the motor 12. The structure is such that the electrode body 2Δ and the dust collection pole body 2B are rotated to remove dust, but since the electrical systems used in these systems are all known, the explanation of Vt will be omitted.

In the first embodiment of the present invention described above, the discharge electrode body 2A and the dust collection pole body 2B are rotated by one motor 12, but the present invention shown in FIG. In the second embodiment, the dust collection electrode body 2B is rotated by the lower motor 12, and the discharge electrode body 2A is moved to the upper chamber 1d of the primary dust collection chamber 1.
The second motor 12A is attached to the rotary shaft 12A1 of the second motor 12A, which is attached to the rotary shaft 12A1. In this way, the discharge electrode body 2A
When the dust collecting electrode body 2B is rotated for dust removal by different rotating means, that is, different motors 12 and 12A, the discharge electrode body 2
By changing the rotation ratio or direction of rotation between A and the dust collecting pole body 2B, it becomes possible to effectively remove dust from firmly attached fume mist. Also, in the first embodiment shown in FIGS. 3 and 4, the rotating shaft 12a has a double shaft structure for the discharge electrode body 2A and the dust collection electrode body 2B, and these shafts are connected to the motor 12. It is also possible to rotate with a different rotation ratio or rotation direction using a gear mechanism housed in the gear box 12b to obtain the same operation and effect as in the second embodiment.

In FIGS. 1 and 2, reference numeral 7 denotes an operation handle for removing dust from the bag filter 6. When the handle 7 is rotated, the dust removal member 8 installed in the secondary dust collection chamber 3 is removed.
can blow off the humid mist firmly attached to the bag filter 6 into the packet 10. Further, 11 is an inspection door for the electrode section 2 attached to the side surface of the primary dust collection chamber 1 so as to be openable and closable.

Since the present invention is as described above, the fume mist sucked into the primary dust collection chamber 1 by the rotation of the dust suction fan 4 is transferred between the discharge electrode body 2A constituting the electrode section 2 and the dust collection electrode body 2.
When passing between the discharge electrodes 2A and TA, the discharge electrodes 2A and TA are charged, agglomerated, and coarsened while being attracted toward the second arbor room 3 and collected by the bag filter 6.
The fume and mist that accumulates on the dust electrode body 2B can be prevented from sticking and accumulating by rotating both 2A and 2B continuously or periodically by the motor 12. The dust removal rotation of the electrode body 2A and the dust collecting pole body 2B is performed using different rotation means, that is, the motor 12 and the second motor 12.
A more excellent dust removal effect can be achieved by rotating the rotation ratio or direction of rotation separately according to A.

Therefore, according to the electrostatic precipitator according to the present invention, it is possible not only to efficiently collect fume mist, which is difficult to collect with a normal bag filter type dust collector, but also to By rotating the electrode section, the fume mist that sticks and accumulates can be shaken off with a centrifugal horn to remove dust, so the restaurant is equipped with a restaurant that can prevent combustion (ignition) accidents caused by the accumulation of fume mist.

In addition, in the present invention, since dust can be removed by rotating the electrode part as described above, it is possible to perform dust removal operation while performing dust collection operation of the dust collector. It is extremely easy electrically to control the rotation of this rotating means continuously or periodically. Therefore, by automating the rotation control of the electrode section, it is possible to eliminate the complicated dust removal work. release the members,
In addition, it is possible to prevent combustion accidents due to neglect of dust removal work, and it has the advantage of eliminating all the drawbacks of this type of conventional equipment, which removes dust from the electrode part by rotating the dust removal brush. We are prepared.

[Brief explanation of the drawing]

1 to 4 show an electrostatic precipitator according to a first embodiment of the present invention, in which FIG. 1 is an overall front view, FIG. 2 is a side view, and FIG. 3 is a primary fs birth chamber. In the enlarged front sectional view of the fourth
The figure is also an enlarged side sectional view, and FIG. 5 shows the second embodiment of the present invention.
FIG. 6 is an enlarged side sectional view of the primary dust collection chamber used in the embodiment, FIG. 6 is a partially omitted enlarged plan view of the discharge electrode used in the present invention, and FIG. 7 is a cut end view of FIG. 6 A-Atsm. It is.
11...-Achievements, 2...
Electrode part, 2A...discharge electrode body, 2B...dust collection electrode body, 3...secondary f51 chamber, 4...dust suction fan,
5...Fan motor, 6...Bag filter, 12.12°A...Electrode rotating motor. Patent applicant Amano Co., Ltd.

Claims (4)

[Claims] (1) At the rear of the primary dust collection chamber, which is equipped with an electrode section that prevents the fine fume dust that has been sucked in from adhering or electrostatically agglomerates, there is a fan for suction and a fan that prevents the fume dust that has become coarse or agglomerated from adhering to the electrode section. In a dust collector that connects a secondary dust collection chamber equipped with a filter for collection, the electrode part of the secondary dust collection chamber is formed by a circular or polygonal discharge electrode and a dust collection pole body facing each other. An electrostatic precipitator characterized in that the discharge electrode body and the dust collection pole body are configured to rotate periodically or continuously. (2) At the rear of the primary dust collection chamber, which is equipped with an electrode section that prevents the fine fume dust that has been sucked in from adhering or electrostatically agglomerates, there is a suction fan and a suction fan that captures the fume dust that has become coarse or agglomerated on the electrode section. In a dust collector in which a secondary dust collecting chamber is connected with a filter for collecting dust, the electrode portions of the secondary dust collecting chambers are arranged in a circular shape or oppositely facing each other. It is composed of a polygonal discharge electrode body and a dust collection electrode body,
An electrostatic precipitator characterized in that the discharge electrode body and the east electrode body are configured to be rotated periodically or continuously by separate rotating means. (3) A patented electrostatic precipitator characterized in that the discharge electrode body and the dust collection pole body are rotated at different rotation ratios by separate rotation means. (4) The electrostatic precipitator according to claim 2, wherein the discharge electrode body and the dust collection pole body are rotated in different directions by separate rotating means.