TW201822889A - Electric dust collector - Google Patents

Abstract

An electric dust collector (1) contains an electrode unit (10) which collects dust in a dust-containing air flow (P). The electrode unit (10) has a dust-collecting electrode plate (2) and a charging electrode plate (9). These electrode plates (2, 9) are alternately arranged between side plates (11, 12). The electrode unit (10) is provided with a charging shaft (18) which holds the charging electrode plate (9) in a hanging state at its upper part. The charging shaft (18) is supported by an insulating member (15) fixed to an upper position of the side plates (11, 12), in an electrically insulating state with respect to the side plates (11, 12). By opening an openable/closable ceiling door (31) provided on a housing (4) of the electric dust collector (1), the insulating member (15) located on the upper part of the electrode unit (10) can be directly cleaned through an opening (36) by an operator.

Description

   Electric dust collector   

The present invention relates to an electric dust collector that collects particles charged by a corona discharge by the action of Coulomb force, and particularly relates to dust or smoke generated in a factory or the like, metal processing using cutting oil, etc. An electric dust collector that collects generated oil mist or oil fume (hereinafter, collectively referred to as "dust").

For a dust collector that attracts dust with a very fine particle size and keeps the air in the factory clean, there is a method of charging the dust by supplying a charge by a corona discharge generated from a charging electrode, and using Coulomb force An electric dust collector for electrically collecting and collecting dust as a counter electrode of a dust collecting electrode. If you want to capture extremely fine dust with a filter, a high-performance filter (such as a HEPA filter) is required. However, this filter must be exchanged frequently because it quickly generates mesh clogging. Therefore, according to the operating cost, From the viewpoint, the electric dust collector is very advantageous.

However, if the electric dust collector continuously accumulates dust which has adhered to the dust collecting electrode and has lost its charge, it will easily cause dust to fly away from the dust collecting electrode. In addition, if the dust is close to the charging electrode plate, It will be in a state prone to cause abnormal discharge, which will gradually reduce the collection efficiency. Therefore, regular maintenance is required to remove the dust accumulated on the dust collecting electrode. In particular, high-viscosity dust such as smoke, oil mist, or oil fume needs to be disassembled to clean the dust collecting electrode part, which requires very time, time and speciality in maintenance.

Therefore, for example, in the electric dust collector shown in Patent Document 1, a charged electrode portion is provided on the upstream side, a dust collection electrode portion is provided on the downstream side, and each electrode portion is unitized, so that it can be easily installed from the device. Remove the electrode. In addition, the dust collecting electrode of each electrode portion is rotated at a rotation speed of about one revolution per minute, and the dust attached to the dust collecting electrode is scraped by an endless belt body arranged to contact the dust collecting electrode. except. In the case of an electric dust collector having a scraping type dust collecting electrode (hereinafter referred to as a scraping type electric dust collecting device), the cleaning frequency of the dust collecting electrode can be reduced to a certain extent.

By the way, high voltage is usually applied to the charged electrode in an electric dust collector. Therefore, when the dust collecting electrode is fixed or rotating slowly as in Patent Document 1, if dust accumulates, it is easy to cause sparks between the electrodes. . When sparks are generated continuously, the machine is forcibly stopped in consideration of the danger of fire and the like.

On the other hand, Patent Document 2 discloses an electric dust collector that increases the rotation speed of the dust collecting electrode. In this electric dust collector, the dust collecting electrode is rotated at a rotation speed of about 200 revolutions per minute (hereinafter, this electric dust collector is referred to as a "high-speed rotary electric dust collector"), so even if sparks are generated between the electrodes, they will be immediately It is difficult to generate spark continuously when it is cut off. Therefore, since a high voltage can be stably supplied and the discharge amount can be maintained, the collection efficiency is also improved.

In addition, since the dust collecting electrode rotates at a high speed, the dust is removed by centrifugal force. Therefore, the dust does not easily accumulate on the dust collecting electrode, and the frequency of cleaning can be reduced.

In addition, the high-speed rotary electric dust collector may spray water or a cleaning agent from a nozzle or the like installed in the device to clean the dust collecting electrode. The high-speed rotary electric dust collector can use the centrifugal force generated by high-speed rotation to remove water or detergent. Therefore, because it has the advantages of fast drying and shortened operation stop time, it can clean the dust collecting electrode.

    [Prior technical literature]         [Patent Literature]    

Patent Document 1: Japanese Patent Laid-Open No. 2009-262007

Patent Document 2: Japanese Patent Laid-Open No. 2008-142670

In the scraper-type electric dust collector of Patent Document 1, since the electrode unit is unitized, the operation of taking out the electrode unit from the frame is simple, but since a gap is provided in the fixed electrode plate that is a charged electrode, and an endless belt body is required It is arranged to contact each of the dust collecting electrode plates, so the structure of the unit itself must be complicated. In addition, since a portion of the charged electrode is cut from the center portion to the outer periphery, there is also a disadvantage that the area affected by the mutual repulsive force with the dust collecting electrode is also reduced, and the trapping efficiency is reduced.

In addition, a fixed high-voltage electrode plate is applied with a high voltage (+/- thousands of volts or more). In order to separate it from the ground voltage, the high-voltage electrode plate is arranged in a frame with an insulating member, ie, an obstruction, interposed therebetween. If dust accumulates on this obstacle, there is a danger of sparks and fire. Therefore, in the scraper type electric dust collector, the obstacle portion is also installed to prevent the accumulation of dust. Slow rotation of the dust collection electrode is used. With the cam-type scraping means, the structure of the electrode unit becomes more complicated.

Although the scraping type electric dust collector can reduce the frequency of cleaning and maintenance of the dust collecting electrode to a certain extent, and can prevent dust from accumulating on the obstacles to some extent by means of scraping, in fact, it is desired to completely scrape the accumulation. There is difficulty with the dust on the obstacles. As a result, the electrode unit must be taken out of the frame and washed.

On the other hand, in the high-speed rotary electric dust collector, although it is difficult to accumulate dust on the dust collecting electrode due to the effect of centrifugal force, the cycle required for cleaning and maintenance can be increased. No, the period of exposure to dusty airflow becomes longer. However, in order to remove the dust from the obstacles, as a result, the device must be disassembled to perform cleaning and the like, and there are difficulties in the ease of maintenance, and it becomes a structure that cannot fully utilize the advantages of high-speed rotation.

Although it can be said that it is difficult to attach dust to the electrodes of the high-speed rotary electric dust collector, if the dust gradually accumulates and causes deterioration such as abrasion or corrosion, it requires maintenance by an operator. In the electric dust collector of Patent Document 2, in order to fix the driving portion to the body, the electrodes need to be removed and washed one by one during cleaning, and the need to stop the operation for a long time for cleaning is generated. This becomes The main reason for reducing the efficiency of machinery.

Therefore, in view of the above-mentioned actual situation, the present invention aims to provide an electric dust collector, which has an electrode unit with a high collection efficiency and a simple structure, and does not need to disassemble the device or take out the electrode unit from the device, which can be cleaned easily and surely. The dust-laden insulation member is an easy-to-maintain structure for users.

In order to solve the above-mentioned problem, in the present invention, a charged shaft for applying a voltage to a charged electrode plate is held on the upper part of the charged electrode plate in a suspended state, and is supported on the electrode in an electrically insulated state by an insulating member. Unit side plate. In addition, the insulating member is provided at an upper portion of a side plate that can be viewed from an opening in an upper portion of a frame of the electric dust collector and can be cleaned.

According to the present invention, it is configured to hold a charged electrode plate in a suspended state on a charged shaft supported by a side plate of an electrode unit, and an insulating member for supporting the charged shaft is provided only on the upper portion of the side plate, and can be opened from the upper portion of the frame The insulation member located on the upper part of the side panel can be touched directly with the finger of the operator, or it can be cleaned with a cleaning tool. Thereby, even if the insulating member becomes dirty due to dust, the operator does not need to disassemble the device or take out the electrode unit, and can directly clean the insulating member. In addition, in the event of a malfunction in the electrode portion, the electrode can be easily taken out for maintenance or exchange as a unit, so that the maintenance of the electric dust collector can be easily performed.

1.100‧‧‧electric dust collector

2‧‧‧ Dust collecting electrode plate

3‧‧‧ floor

4‧‧‧frame

5‧‧‧ sidewall

6‧‧‧ side entrance

6a‧‧‧screw

7‧‧‧ Guiding Road

8‧‧‧fan

9‧‧‧ live electrode plate

9a‧‧‧Connecting hole

9b‧‧‧through hole

10, 10A‧‧‧ electrode unit

11, 12‧‧‧ side panels

11A, 12A‧‧‧Side panels

11a, 12a‧‧‧through hole

13‧‧‧rotation axis

14‧‧‧discharge pin

14’‧‧‧discharge line

15‧‧‧Insulating member

16‧‧‧sealing material

17‧‧‧foot

18‧‧‧ charged shaft

18a‧‧‧Receiving Department

19‧‧‧bearing

20‧‧‧ Suction port

21‧‧‧ exhaust port

22‧‧‧Top plate

23‧‧‧Top plate

13a, 24‧‧‧ Couplings (connecting body)

25‧‧‧ opening

26‧‧‧sealing material

27‧‧‧Nozzle

29‧‧‧ spacer

30‧‧‧ support bar

31‧‧‧Top Door

32‧‧‧ track

33‧‧‧Fixed parts

34‧‧‧Wire

35‧‧‧Drive motor

36‧‧‧ opening

37‧‧‧Contact

37a‧‧‧contact electrode

37b‧‧‧Insulating member

40‧‧‧High voltage power supply

41‧‧‧Contact

42‧‧‧ Dust collection room

D‧‧‧ runner

F‧‧‧ clean air

P‧‧‧ dusty airflow (polluted air)

FIG. 1 is a diagram showing an electric dust collector, FIG. 1A is a perspective view, and FIG. 1B is a cross-sectional view.

2 is a cross-sectional view of the electric dust collector viewed from the side, FIG. 2A is a cross-sectional view including an electrode unit, and FIG. 2B is a cross-sectional view without the electrode unit.

FIG. 3 is an exploded view of the electric dust collector, FIG. 3A is a view showing a state where the electrode unit is taken out, and FIG. 3B is a view showing a back side of the side door.

FIG. 4 is a diagram showing an electrode unit, FIG. 4A is a perspective view, and FIG. 4B is a cross-sectional view of an obstacle's periphery.

FIG. 5 is a view showing a state where the top door of the electric dust collector is opened, FIG. 5A is a perspective view viewed from the front side, and FIG. 5B is a perspective view viewed from the back side.

Fig. 6 is a diagram showing another embodiment of the electric dust collector.

FIG. 7 is a diagram showing a discharge line.

In the present invention, in an electric dust collector that separates the dust collected by the dust collecting electrode plate using centrifugal force generated by the rotation of the dust collecting electrode plate, the electrode portions of the dust collecting electrode plate and the charged electrode plate are alternately arranged. The unitization is discussed. The electrode unit is configured as an electrode unit in which a dust collecting electrode plate and a charged electrode plate are integrated between a pair of opposing side plates, and the electrode unit is taken out of a housing of the electric dust collector. In addition, by positioning the insulating member supporting the charged shaft of the charged electrode plate at the upper portion of the side plate of the electrode unit, the dirt of the insulating member can be directly confirmed from the opening in the upper part of the frame, and the dirt can be wiped with a cleaning tool.

In a preferred embodiment of the present invention, a ring-shaped sealing material is provided between at least one of the pair of side plates and the frame. By providing the sealing material so as to surround the power receiving unit that receives the voltage supplied to the charged electrode plate, and the connecting body that transmits the rotational force of the drive motor to the rotating shaft, the sealing material can be charged against the dust-containing gas flowing in the flow path. Parts and joints are sealed. The sealing material may be provided along the periphery of the side plate. The power receiving unit can be configured by, for example, an end portion of a charged shaft exposed on the outer side of the side plate, and the connecting body can be configured by, for example, a magnetic coupling.

The frame of the electric dust collector may also have an openable and closable door covering an opening provided on the upper part. In addition, the frame of the electric dust collector may have a nozzle for blowing a cleaning liquid or air on the insulating member of the electrode unit. This nozzle can quickly remove the dirt of the insulating member, and can also quickly dry the insulating member to which the cleaning liquid is attached.

In a typical embodiment of the present invention, the frame of the electric dust collector is provided with a side door for allowing the electrode unit to enter and exit, and a side wall facing the side door. The electrode unit is disposed in the flow path such that one of the pair of side plates faces the side door and the other of the pair of side plates faces the side wall. In addition, a space surrounded by a pair of side plates, a top plate of the frame body, and a bottom plate of the frame body forms a dust collecting chamber. In the dust collecting chamber, a dust-containing air current flows between the dust collecting electrode plate and the charged electrode plate.

    [Example 1]    

Hereinafter, an embodiment of the electric dust collector 1 of the present invention will be described with reference to FIG. 1. The electric dust collector 1 of this embodiment is provided with a box-shaped housing 4, an air inlet 20 for sucking in a dust-containing airflow P containing dust from a machining center (not shown), etc. through an exhaust pipe (not shown), and The exhaust port 21 that discharges the clean air F after the dust is removed and purified. The dust-containing airflow P introduced into the casing 4 from the suction port 20 flows in a flow direction D formed between the suction port 20 and the exhaust port 21 in the direction of the arrow (FIG. 1B). The top plate 22 of the frame 4 includes two top doors 31 that can be opened and closed, and a central top plate 23. An electrode unit 10 is provided in the flow path D in the frame 4. The electrode unit 10 includes a plurality of dust-collecting electrode plates 2 for collecting dust, and a plurality of charged electrode plates 9 opposed to each of the dust-collecting electrode plates 2. The electrode plates 2 and 9 are arranged in parallel and alternately at equal intervals. Laminated. The frame 4 has a side door 6 for allowing the electrode unit 10 to enter and exit. A fan 8 is disposed on the downstream side of the electrode unit 10, and the fan 8 generates airflow in the casing 4 to forcibly exhaust the air.

FIG. 2A is a side sectional view of the electric dust collector 1. FIG. 2A shows a state where the dust collecting electrode plate 2 and the charged electrode plate 9 overlap each other when viewed from the front side. The dust collecting electrode plate 2 is a circular plate-like plate material, and rotates around the rotation axis 13. The charged electrode plate 9 is held on the charged shaft 18 and has an arc portion with a slightly smaller radius (with the rotation axis 13 as the center) than the radius of the dust collecting electrode plate 2 on the upstream side of the dust-containing gas flow P. Discharge pins 14 project radially from the outer periphery of the arc portion. The discharge pin 14 constitutes a discharge portion that applies a charge to the dust. The front end of the discharge pin 14 is located at the same position as or slightly inside the outer periphery of the dust collecting electrode plate 2. The arrangement direction of the discharge pins 14 on the arc portion of the charged electrode plate 9 is along the outer periphery of the dust collecting electrode plate 2. A nozzle 27 is provided directly below the top plate 23. The nozzle 27 is a nozzle for blowing a cleaning liquid or air on the insulating member 15 supporting the charged shaft 18. The insulating member 15 is formed by applying a glaze (medicine) on a hard porcelain ware such as ceramics having excellent insulation properties and strong mechanical strength, and sintering it, and is formed into an obstacle shape. As the insulating member 15, a commercially available barrier may be used. The insulating member 15 can be washed by spraying a cleaning solution or air on the insulating member 15, and the insulating member 15 to which the cleaning solution is attached can be quickly dried. It should be noted that the nozzle 27 is not limited to directly below the top plate 23 and may be provided at other locations.

FIG. 2B shows a state where the electrode unit 10 is removed from the housing 4. On the side wall 5 of the frame 4 opposite to the side door 6 shown in FIG. 1A, a contact portion 37 is provided for supplying power to the charged electrode plate 9. The contact portion 37 includes a contact electrode 37a and an insulating member 37b provided around the contact electrode 37a. The insulating member 37b is the same as the aforementioned insulating member 15 and supports the contact electrode 37a on the side wall 5 in an electrically insulated state. The 24 shown by the dotted line is a coupler serving as a coupling body that transmits the rotational force from the driving motor 35 (FIG. 5B) located outside the side wall 5 to the rotating shaft 13 of the dust collecting electrode plate 2. By using a magnetic coupling as the coupling 24, the coupling 24 can transmit power to the rotation shaft 13 without having to penetrate the side wall 5.

FIG. 3A shows a state where the side door 6 of the electric dust collector 1 is removed, and the opening 25 of the frame 4 is opened to take out the electrode unit 10. As is apparent from FIG. 3A, the electrode unit 10 includes a pair of side plates 11 and 12 (usually made of metal), and is housed in the frame 4 such that the side plate 11 faces the side wall 5 and the side plate 12 faces the side door 6. By removing the side door 6, the electrode unit 10 can be taken out from the opening portion 25 of the frame 4. A pair of legs 17 are provided on the bottom of the electrode unit 10. The leg portion 17 slides from a front side in FIG. 2 to a side wall 5 side of the electric dust collector 1 due to a pair of guide paths 7 provided slightly above the bottom plate 3 (refer to FIG. 2) on the side of the frame body 4. The electrode unit 10 is inserted into the frame body 4. As shown in FIG. 3A, a ring-shaped sealing material 16 is provided around the side plate 12 of the electrode unit 10 along a circumference of the side plate 12. In addition, a ring-shaped sealing material 26 is also provided around the opening portion 25 so as to run along the periphery of the opening portion 25. The screw 6 a is a screw that presses and fixes the side door 6 to the frame 4. FIG. 3B shows the back side of the side door 6. When the electrode unit 10 is inserted into the electric dust collector 1, and the side door 6 is locked with the screw 6a, the sealing material 16 of the side plate 12 is pressed at the position indicated by the two-dot chain line d2 of the side door 6. In addition, the sealing material 26 on the side of the frame 4 on the back side of the side door 6 is pressed by a screw 6a to a position indicated by a two-dot chain line d3.

As shown in FIGS. 1B and 2A, in the electrode unit 10, the charged electrode plate 9 is held on the charged shaft 18 in a suspended state at an upper portion thereof. Specifically, as shown in FIG. 4A, an insulating member 15 is fixed on the upper portions of the side plates 11 and 12. Each of the charged shafts 18 is supported by the insulating member 15 (see FIG. 4B), and each of the charged shafts 18 and the side plates 11 and 12 is supported. They are electrically insulated. The charged shaft 18 supplies a charged potential to the charged electrode plate 9 through a connection hole 9 a (see FIG. 1B) provided at an upper portion of the charged electrode plate 9 at intervals. A plurality of spacers 29 are inserted in the charged shaft 18 and are interposed between the adjacent charged electrode plates 9 and between the charged electrode plates 9 and the side plates 11 and 12. A space for accommodating the dust collecting electrode plate 2 is provided by the spacer 29. A through-hole 9b (see FIG. 1B) is provided in the charged electrode plate 9 so that the rotating shaft 13 can pass therethrough in a non-contact manner. On the other hand, the support rod 30 fixes the charged electrode plates 9 to each other via the spacer 29 in the lower portion of the charged electrode plate 9. The distance between the adjacent charged electrode plates 9 is maintained by the supporting rod 30 and the spacer 29. The support rod 30 has a function of stably holding the charged electrode plate 9 and does not contact the side plates 11 and 12. The insulating member 15 that comes into contact with the dust-containing airflow P is provided only on the upper portion of the electrode unit 10.

Bearings 19 are provided on the side plates 11 and 12. The bearing 19 rotatably receives the rotation shaft 13. The rotation shaft 13 is a connection hole (not shown) provided in the center of the disc-shaped dust collecting electrode plate 2. A spacer (not shown) interposed between the dust collecting electrode plates 2 is inserted into the rotating shaft 13. With this spacer, it is ensured that the dust collecting electrode plate 2 does not contact the charged electrode plate 9. Space. The dust-containing airflow P flows between the side plates 11 and 12, and dust is captured by the dust collecting electrode plate 2.

Hereinafter, the peripheral structures of the charged shaft 18, the rotation shaft 13, and the support rod 30 of the electrode unit 10 will be described. In FIG. 4B, the insulating member 15 penetrates the side plates 11 and 12 and is fixed to the through holes 11 a and 12 a provided in the side plates 11 and 12 in an embedded state. By fixing the insulating member 15 in a buried state, air is prevented from passing through the through holes 11 a and 12 a on the front and back surfaces of the side plates 11 and 12. One portion may be a portion that supplies a charged potential to the charged shaft 18 from a high-voltage power source to be described later. In this example, power is supplied to a portion of the insulating member 15 shown by S in FIG. 4A. Therefore, the charged shaft 18 must pass through the side plate 11 at the position S. However, the charged shaft 18 does not need to pass through the side plates 11 and 12 at other positions, as long as the charged shaft 18 is fixed to the side plates 11 and 12 by the insulating member 15.

The rotation shaft 13 is rotatably supported by a pivot through a bearing 19 provided in a hole (not shown) penetrating through the side plates 11 and 12. One end of the rotating shaft 13 penetrates the side plate 11, and the outside of the side plate 11 is driven by the drive motor 35, so that the coupling 13 a is fixed to the rotating shaft 13. In this embodiment, as a coupling body that transmits the power of the drive motor 35 to the dust collecting electrode plate 2, a magnetic coupling 13a is used, but it is not limited to this, and a spline shaft or a flexible coupling may also be used. . The dust collecting electrode plate 2 rotates at a rotation speed of 200 revolutions per minute in conjunction with the driving motor 35.

As shown in FIG. 4A, the side plate 11 is the same as the side plate 12 shown in FIG. 3A, and has a ring-shaped sealing material 16 around its periphery. Since the charged potential is obtained from the contact electrode 37a (FIG. 2B) of the side wall 5, as shown in FIG. 4B, it is necessary to make the end of the charged shaft 18 insulated by the insulating member 15 at the S position as the power receiving portion 18a. It is exposed outside the side plate 11. In addition, since the self-driving motor 35 receives the rotational force of the dust collecting electrode plate 2, as shown in FIG. 4A, the connecting body 13 a needs to be exposed outside the side plate 11. When the electrode unit 10 is housed in the frame 4 of the electric dust collector 1 and the side door 6 is locked with the screw 6a, the side plate 11 of the electrode unit 10 faces the side wall 5 of the frame 4 and is sealed along the periphery of the side plate 11 The material 16 is pressed against the side wall 5 of the frame 4. In FIG. 2B, the two-point chain line d1 shows a portion where the side wall 5 of the sealing material 16 is pressed. Thereby, a sealed space surrounded by the side wall 5, the side plate 11, and the sealing material 16 is formed. By enclosing the sealed space with the sealing material 16 for one week, the part receiving power and power transmission can be sealed from the space where the dust-containing airflow P flows, so that the pollution of the polluted air P can be suppressed. In addition, the space surrounded by the side door 6, the side plate 12, and the sealing material 16 also becomes a sealed space sealed from the space in which the dust-containing airflow P flows.

In this way, the outside of the side plates 11 and 12 of the electrode unit 10 provided in the flow path D of the dust-containing air flow P is not exposed to the dust-containing air flow P by the sealing material 16, and the inside of the side plates 11 and 12 becomes exposed to Dust collection chamber 42 (see FIG. 5) of the dust current P. The dust collecting chamber 422 is a space surrounded by the side plates 11, 12, the top plate 22 (see FIG. 1) of the frame 4, and the bottom plate 3 (see FIG. 1) of the frame 4, and the dust collecting chamber 42 contains dust. The air flow P flows between the dust collecting electrode plate 2 and the charged electrode plate 9.

FIG. 5 is a diagram showing a state where the top door 31 is opened. The top door 31 is provided on the side of the intake port 20 and the side of the exhaust port 21. Any one of the top doors 31 can slide along a pair of rails 32 and 32 and is fixed to the frame body 4 by a fixing member 33. When the top door 31 is slid, the opening 36 provided in the frame 4 is opened. The opening 36 has a sufficient width to touch the insulating member 15 in the dust collecting chamber 42 of the electrode unit 10 housed in the housing 4. When the opening 36 is opened, the dust collecting electrode plate 2 and the charged electrode plate 9 held between the side plates 11 and 12 of the electrode unit 10 housed in the electric dust collector 1 can be viewed from the outside. Regardless of the side of the electric dust collector 1 or the electrode unit 10, there are no structures that are exposed directly above the insulating member 15 that is exposed to the inside of the side plates 11 and 12 of the dust-containing air flow P. Therefore, the operator may A cleaning tool such as a waste wire or a brush is inserted to directly wipe the surface of the insulating member 15. Regarding the shape of the insulating member 15 exposed to the side of the dust-containing airflow P, such as a monotonous shape of a circular plate shape, it is relatively easier to clean and is therefore preferable.

By sliding the two top doors 31 to open the openings 36, the insulating members 15 at the four positions of the electrode unit 10 can be cleaned all. Further, in FIG. 5B, reference numeral 35 denotes a driving motor that provides a rotational force to the dust collecting electrode plate 2. In addition, reference numeral 34 is a lead wire for supplying a charged potential to the charged electrode plate 9, and is electrically connected to the high-voltage power source 40 and the power receiving unit 18 a (FIG. 4B). The frame 4 itself is grounded, and the dust collecting electrode plate 2 is also grounded.

Next, the operation of the electric dust collector 1 of this embodiment will be described. By driving the drive motor 35, the dust collecting electrode plate 2 is rotated. In addition, due to the rotation of the fan 8, the dust-containing airflow P flowing into the casing 4 from the suction port 20 moves between the dust collecting electrode plate 2 and the charged electrode plate 9. By the corona discharge generated from the front end of the discharge pin 14 of the charged electrode plate 9, the dust contained in the dust-containing gas flow P acquires a positive or negative charge. When the dust collecting electrode plate 2 and the charged electrode plate 9 face each other, an electric field is formed therebetween, and the charged dust is attracted toward the ground-side dust collecting electrode plate 2 and captured.

Since the dust collecting electrode plate 2 rotates at a high speed, the dust adhered to the dust collecting electrode plate 2 is removed by centrifugal force. Therefore, it is difficult for dust to accumulate on the dust collecting electrode plate 2, and the maintenance period such as cleaning can be increased. On the other hand, because the insulating member 15 in the dust collection chamber 42 is reduced in frequency, the period of exposure to the dust-containing airflow P is increased, so the period required for cleaning is shorter than that of the dust collection electrode plate 2. However, by holding the charged electrode plate 9 in a suspended state across the two charged shafts 18 provided above the pair of side plates 11 and 12, the insulating member 15 supporting the charged shaft 18 also exists only in the electrode unit 10. Upper part. Therefore, the operator can directly wipe the insulation member 15 exposed to the dust-containing airflow P in the dust collecting chamber 42 with a waste wire or a brush from the opening 36 provided in the frame 4 of the electric dust collector 1, so there is no need to deliberately The electrode unit 10 is taken out from the frame 4 and can be easily maintained. In addition, the regular maintenance intervals of specialized personnel such as manufacturers can be increased.

In addition, as long as the side door 6 is removed, the dust collection electrode plate 2 or the charged electrode plate 9 can be easily removed for each electrode unit 10, and therefore the exchange operation is extremely easy. Therefore, for example, in an environment where the electric dust collector 1 needs to be continuously operated in a factory or the like, as long as the electrode unit 10 is replaced with a new electrode unit 10, the operation can be started immediately, and the operation stop time can be greatly shortened.

In addition, unlike the scraper type electric dust collector, there is no gap in the overlapping portion of the dust collecting electrode plate 2 and the charged electrode plate 9, so there is no place where the mutual repulsive force between the electrode plates is cut off midway, and the collection efficiency is also Get higher.

In addition, since the opening 36 is opened sufficiently wide, the insulating member 15 or the dust collecting electrode plate 2 can also be cleaned using a high-pressure cleaner. After washing, the dust collecting electrode plate 2 is rotated at a high speed, which not only dries quickly but also shortens the operation stop time.

    [Example 2]    

FIG. 6 shows an electric dust collector 100 containing two electrode units 10A. Each of the electrode units 10A is arranged in a stacking direction of the dust collecting electrode plate 2 and the charged electrode plate 9 and is housed in the frame 4. The side plates 11A and 12A of the electrode unit 10A are rectangular, and the shape is slightly different from the side plates 11 and 12 of the electrode unit 10 of Example 1. 1 is the same. Furthermore, a contact 41 is provided. The contact 41 is electrically connected to each of the charged shafts 18 when the side plate 12A of the left electrode unit 10A and the side plate 11A of the right electrode unit 10A overlap each other (see FIG. 4B). In addition, a connecting body (not shown) is provided, and this connecting system transmits a rotational force between the rotating shafts 13 when the side plate 12A of the left electrode unit 10A and the side plate 11A of the right electrode unit 10A overlap.

When the two electrode units 10A are arranged adjacent to each other and the opposing side plates 11A and 12A overlap each other, the sealing material 16 located between the side plates forms a sealed space (in addition, in FIG. 6, the electrode unit 10A on the left side The side plate 12A is provided with a sealing material 16, so the sealing material of the side plate 11A of the right electrode unit 10A can also be removed). In this sealed space, a contact member 41 (not shown) that electrically connects the charged shaft 18 of each electrode unit 10A, or a connecting body (not shown) that transmits a rotational force between the rotating shafts 13 of each electrode unit 10A, etc. Self-polluting air insulation. According to the second embodiment, by arranging two electrode units 10A adjacent to each other, it is not necessary to increase the electrode unit itself, and it can cope with the needs of an electric dust collector that requires a large amount of air. In addition, the opening 36 (see FIG. 5) has a width comparable to the width of the frame 4. Therefore, the operator can directly clean all the insulating members 15 in the dust collection chamber of the electrode unit 10A.

In the present invention, in addition to the above, various embodiments as follows can be adopted.

In FIG. 4, a single sealing material 16 surrounding the power receiving portion 18 a and the connecting body 13 a is provided on the side plate 11 of the electrode unit 10. However, two sealing materials 16 surrounding the power receiving portion 18 a and the connecting body 13 a may be provided.

In the above-mentioned Embodiments 1 and 2, the ceramic is used as the insulating member 15 as an example, but the ceramic may be replaced with the insulating member 15 made of glass, synthetic resin, or the like. That is, the insulating member 15 only needs to be a material having excellent insulation properties and high mechanical strength, and its shape may be a shape other than an obstacle. In addition, a cylindrical resin member may be attached to the end of the telescopic shaft 18, or a resin may be integrally molded, and the resin portion may be used as an insulating member.

In the above-mentioned first and second embodiments, in addition to the discharge pin 14, the discharge portion may be a member having a tip such as a sawtooth, or may be a discharge line 14 'as shown in FIG. In addition, the charged electrode plate 9 may be provided separately from the discharge portion.

In the first and second embodiments, although the sealing material 16 is provided on the side plates 11 and 12, the sealing material 16 may be provided inside the side wall 5 or the side door 6.

Claims (9)

    An electric dust collector is characterized by comprising: a frame body having an opening at the upper part; an air inlet that sucks a dust-containing airflow containing dust into the frame body; and an electrode unit that is provided in the dust-containing body sucked from the air inlet. The flow path through which the airflow flows collects the dust in the dust-containing airflow; and the exhaust port, which discharges the clean airflow after removing the dust; the electrode unit is provided with: one opposite side plate, which can be separated from the above The frame is removed; multiple pieces of dust collecting electrode plates collect dust and separate the collected dust by centrifugal force generated by rotation; multiple pieces of charged electrode plates are opposed to each of the above dust collecting electrode plates; The rotating shaft receives the rotating force of the driving motor to rotate the dust collecting electrode plate; and the charging shaft is used to apply a voltage from the power source to the charged electrode plate; the dust collecting electrode plate and the charged electrode plate are connected to the above A pair of side plates are alternately arranged in a laminated shape with a predetermined interval therebetween. The charged shaft is held on the upper part of the charged electrode plate in a suspended state, and is electrically insulated by an insulating member. State is supported on the side plates, the insulating member is disposed at an upper position of the line side of the opening can be observed from the above and may be for sweeping.         The electric dust collector according to claim 1, wherein a ring-shaped sealing material is provided between at least one of the pair of side plates and the frame.         The electric dust collector according to claim 2, comprising: a power receiving unit located outside the side plate and receiving a voltage supplied from the power supply to the charged electrode plate; and a connecting body located outside the side plate and facing the rotation axis. The rotational force of the driving motor is transmitted, and the sealing material is provided so as to surround the power receiving unit and the coupling body, and can seal the power receiving unit and the coupling body from a dust-containing airflow flowing through the flow path.         The electric dust collector according to claim 2 or 3, wherein the sealing material is provided along a circumference of the side plate.         The electric dust collector according to claim 3, wherein the power receiving unit is configured by an end portion of the charged shaft exposed on an outer side of the side plate, and the connection system is configured by a magnetic coupling.         The electric dust collector according to any one of claims 1, 2, 3, and 5, wherein the frame has an openable and closable door covering the opening.         The electric dust collector according to any one of claims 1, 2, 3, and 5, wherein the housing has a nozzle for blowing a cleaning liquid or air on the insulating member of the electrode unit.         According to the electric dust collector of any one of claims 1, 2, 3, and 5, wherein the frame body includes a side door for allowing the electrode unit to enter and exit, and a side wall opposite to the side door, the electrode unit is based on the first One of the side plates facing the side door and the other of the pair of side plates facing the side wall are arranged in the flow path, and the pair of side plates, the top plate of the frame body, and the frame body face each other. The space surrounded by the bottom plate forms a dust collecting chamber. In the dust collecting chamber, the dust-containing airflow flows between the dust collecting electrode plate and the charged electrode plate.         According to the electric dust collector of claim 1, wherein the plurality of electrode units are provided, the electrode units are arranged in a stacking direction of the dust collecting electrode plate and the charged electrode plate, and are housed in the frame.