JP2963840B2 - Electrostatic dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator.

[0002]

2. Description of the Related Art Conventionally, a case having a suction port and a discharge port is provided outside an electrostatic precipitator for collecting mist and the like. The case houses an electrostatic precipitator provided with a discharge electrode and a precipitating electrode. This electrostatic precipitator generates a discharge between the discharge electrode and the precipitating electrode, and moves the fine particles such as mist to the precipitating electrode side by the discharge to collect the mist.

[0003] On one side surface of the case, a door portion which is opened and closed by turning is formed. That is, after stopping the supply of power to the discharge electrode and the dust collecting electrode, the worker performs cleaning and maintenance work of the electrostatic dust collecting device by, for example, opening this door.

[0004]

However, even after the supply of power is stopped, the electric charges are accumulated in the dust collecting electrode and the discharge electrode. Therefore, it is necessary to ground each dust collecting electrode and discharge electrode before performing maintenance work or the like of the electrostatic precipitator to release the electric charge accumulated in the dust collecting electrode and discharge electrode.

[0005] Therefore, there is a problem that the work such as grounding must be performed before the maintenance work is performed, and the work takes time and the like, so that the workability is deteriorated.
In addition, there is a problem in that the electric charge accumulated in both the dust collecting electrode and the discharge electrode must be released, so that it takes more time and effort.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electrostatic precipitator capable of easily grounding a precipitating electrode or a discharge electrode.

[0007]

According to a first aspect of the present invention, there is provided an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case. in the electrostatic precipitator having a door portion for opening and closing by pivots, bullet to the door portion is spaced apart from the electrode discharge at its closed state, at the time of opening operation of the door portion contacting the discharge electrode
As its gist in that it comprises a first conductive member comprising a sexual member.

According to a second aspect of the present invention, there is provided an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case.
In the case, the case is provided with an electrostatic precipitator provided with a door that opens and closes by rotating. In the electrostatic precipitator, the door comes into contact with the dust collecting electrode when the door is closed, and when the door is open, the dust collects from The gist of the present invention is to provide a second conductor member that is separated.

According to a third aspect of the present invention, there is provided an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case.
In the electrostatic precipitator provided with a door that opens and closes by rotating its case, the door separates from the discharge electrode when the door is closed and comes into contact with the discharge electrode when the door is opened. The gist of the present invention is to provide a first conductor member and further provide a second conductor member which comes into contact with the dust collection electrode when the door is closed and separates from the dust collection electrode when the door is open. .

According to a fourth aspect of the present invention, there is provided an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case, a lid member for forming an opening in the case and closing the opening. Wherein the lid member is provided with a lock mechanism for locking the lid member to the case based on the rotation of the rotation axis. In the electrostatic dust collector, the rotation axis of the lock mechanism is turned together with the rotation axis. The gist of the present invention is that the first conductor member that moves and separates from the discharge electrode in the locked state and that is in contact with the discharge electrode when the rotating shaft that releases the locked state rotates is fixed.

[0011]

According to the first aspect of the present invention, for example, when the door of the case is opened for maintenance work or the like while the power supply of the electrostatic precipitator is stopped, the elastic portion is opened.
The first conductor member made of a material rotates together with the door.
Then, at the time of the rotation, the first conductor member made of the elastic member comes into contact with the discharge electrode, and the electric charge accumulated in the discharge electrode is
It escapes to the case via the first conductor member made of an elastic member and is grounded.

According to the second aspect of the present invention, the power is supplied to the electrostatic precipitator and the door is closed when the precipitator is driven. Therefore, the second conductor member is in contact with the dust collection electrode. That is, the dust collection electrode is grounded while the electrostatic precipitator is driven. Then, when the supply of power is stopped and the electrostatic precipitator is stopped, the electric charge accumulated in the precipitating electrode by this ground is released to the case side via the second conductor member.

When the door is opened, the contact between the second conductor member and the dust collecting electrode is released. According to the third aspect of the present invention, the power is supplied to the electrostatic precipitator, and the door is closed when the precipitator is driven. Therefore, the second conductor member is in contact with the dust collection electrode. That is, the dust collection electrode is grounded while the electrostatic precipitator is driven. Then, when the supply of power is stopped and the electrostatic precipitator is stopped, the electric charge accumulated in the precipitating electrode by this ground is released to the case side via the second conductor member.

Further, when the power supply to the electrostatic precipitator is stopped, if the door of the case is opened for maintenance work or the like, both the first and second conductor members rotate with the door. . Then, at the time of the rotation, the second
The contact between the first conductive member and the dust collection electrode is released, the first conductive member comes into contact with the discharge electrode, and the charge accumulated in the discharge electrode is released to the case via the first conductive member and grounded. .

According to the fourth aspect of the invention, the electrostatic precipitator is normally driven with the lid member locked to the case by the lock mechanism. Then, in order to remove the lid member for performing maintenance work or the like of the electrostatic precipitator, supply of power to the electrostatic precipitator is stopped, and the rotating shaft of the lock mechanism is rotated to release the lock. . Then, the first conductor member rotates together with the rotation shaft. Then, at the time of the rotation, the first conductor member comes into contact with the discharge electrode, and the electric charge accumulated in the discharge electrode is released to the case via the first conductor member and the lid member, and is grounded.

[0016]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. As shown in FIGS. 1 and 2, the electrostatic precipitator 1 is formed on its outer periphery by a box-shaped case 2 made of a conductor such as a metal and having a rectangular cross section. This case 2
A flat plate portion 3 extending inward is formed at the lower portion of the inner side surface of the. An introduction chamber 2a for introducing air containing mist and the like is formed below the flat plate portion 3, and a collection chamber 2b for collecting mist and the like contained in the air is formed above the flat section 3. A suction port 4a for sucking air containing mist and the like and a discharge port 4b for discharging mist and the like collected by the dust collector 1 to the outside of the dust collector 1 are formed on the lower surface of the introduction chamber 2a. A discharge port 4c for discharging air purified by the dust collector 1 is formed on the upper side surface of the collection chamber 2b. Further, an opening (not shown) is formed on the upper surface of the collection chamber 2b, and a lid B is attached to close the opening. In addition, a flange portion 5 is formed at the tip of the suction port 4a, so that it can be easily attached to various machines such as a cutting machine that generates mist and the like.

A fan 6 is connected to the suction port 4a in the introduction chamber 2a. The fan 6 is attached to the lower surface of the introduction chamber 2a via an insulating member, and the fan 6 and the case 2 are maintained in an insulated state. A propeller (not shown) is provided in the fan 6, and an opening 6 a that connects the suction port 4 a and the inside of the case 2 is formed in an upper portion of the fan 6. That is, as the propeller rotates, air containing mist and the like is sucked into the suction port 4 a, and the sucked air is introduced into the case 2 from the opening 6 a via the fan 6.

A door 7 is formed on one side of the case 2, and the door 7 is provided so as to be rotatable about a hinge 7a. A handle 7b is attached to the door portion 7. A grounding spring 8 as a first conductor member made of an elastic member such as a conductor coil spring is attached to an upper portion of the door portion 7. This ground spring 8 is located inside the case 2,
It extends into the collection chamber 2b and is provided rotatably with the door part 7. A pressing spring 9 as a second conductor member made of a coil spring is attached via a bracket 10 to a substantially central portion in the vertical direction of the door portion 7. The pressing spring 9 extends into the case 2, that is, into the collection chamber 2 b, and is provided rotatably with the door 7.

An electrostatic precipitator 11 is provided in the collection chamber 2b. The electrostatic precipitator 11 is provided with a plurality of square pipes 12 each having a square cross section made of a conductor such as an aluminum material and serving as a precipitating pole. Pieces) are combined in a square shape and welded to each other. A plate member 13 is welded to a lower portion of the square pipes 12 combined in a square shape so as to surround the square pipes 12 combined. The square pipe 12 is disposed in the collection chamber 2b by fixing the plate member 13 to the upper surface of the flat plate portion 3 via a sealing member or an insulating member (not shown). At this time, this seal member can prevent air including mist or the like from leaking from the fixed portion between the plate member 13 and the flat plate portion 3. In addition, square pipe 12
And the case 2 are reliably insulated.

When the door 7 is closed,
The pressing spring 9 is brought into contact with the side surface of the square pipe 12,
By rotating and opening the door part 7, the contact state between the pressing spring 9 and the square pipe 12 is released. Also, square pipe 1
A power supply (not shown) is connected to 2 and the power supply charges the negative electrode. The square pipe 12 has a size of 30 mm × 100 mm to 150 mm.

A bracket 14 is provided above the square pipe 12.
A + -electrode plate 15 in the form of a flat plate charged to a positive pole is fixed to the upper part of the bracket 14. This +
Since the entirety of the pole electrode plate 15 including the upper and lower surfaces is covered with an insulator 16 made of nylon resin or the like, the square pipe 12 and the positive electrode plate 15 are reliably insulated. The positive electrode plate 15 includes the positive electrode plate 15
Are inserted through a plurality of positive electrode pins 17 as discharge electrodes. The positive electrode pin 17 is a positive electrode plate 1
Since it is disposed in contact with No. 5, it is charged to the positive pole. The positive electrode plate 15 has a square through hole 15.
a is formed. In the present embodiment, a total of nine positive electrode pins 17 are arranged three each in the vertical and horizontal directions, and are inserted into the square pipes 12.
That is, the positive electrode pin 17 is covered by the inner surface of the square pipe 12. The lower end of the positive electrode pin 17 slightly protrudes downward from the lower surface of the square pipe 12. The head 18 of the positive electrode pin 17 is
And its head 18 is covered with an insulator 16 a made of the same material as the insulator 16.

On the other hand, + which is disposed in the vicinity of the position closest to the corner portion A where the grounding spring 8 is located
A metal rod 19 made of a conductor is fixed to the head 18a of the pole electrode pin 17 (+ pole electrode pin 17a). When the door 7 is rotated and opened, the ground spring 8 comes into contact with the metal bar 19 during the opening operation. In this embodiment, a voltage of 10,000 volts is applied to the positive electrode pin 17 and the square pipe 12 by the power supply.

In the electrostatic precipitator 11, a strong DC magnetic field is formed between the positive pole charged positive electrode pin 17 and the negative pole charged square pipe 12.
A positive ion shower from the positive electrode pin 17 toward the square pipe 12 occurs. Therefore, fine particles such as mist introduced into the electrostatic precipitator 11 are positively charged by colliding with positive ions, and move to the square pipe 12 under the action of a strong Coulomb force due to a DC electric field. And
Fine particles such as mist are collected by attaching to the square pipe 12.

Next, the operation and effect of the electrostatic precipitator thus configured will be described. First, when the electrostatic precipitator 1 is driven, as shown in FIG. 1, the door 7 is closed, and the pressing spring 9 is held in a state of contact with the square pipe 12. Accordingly, the pressing spring 9 electrically connects the pressing spring 9 and the square pipe 12 to each other, and the square pipe 12 is grounded.

In this state, the electrostatic precipitator 11 is stopped, and the supply of power to the square pipe 12 is stopped. Then, since the square pipe 12 is grounded, the electric charge accumulated in the square pipe 12 is transferred to the door portion 7 through the pressing spring 9.
Escaped to

Next, the door 7 of the case 2 is opened by rotating, for example, to remove dust and the like adhering to the inside of the square pipe 12. Then, the pressing spring 9 and the ground spring 8 are connected to the door portion 7.
It rotates with it. The pressing spring 9 is a square pipe 12
After that, the ground spring 8 engages with and contacts the metal rod 19 attached to the positive electrode pin 17 (+ electrode pin 17a) located near the corner A. Then, while the tip of the ground spring 8 is still engaged with the metal rod 19,
Therefore, the ground spring 8 rotates while bending. When the door 7 is further rotated, the engagement between the tip of the ground spring 8 and the metal bar 19 is released, and the ground spring 8 and the metal bar 19 are separated.

When the door 7 rotates, the metal rod 1
When the tip 9 of the grounding spring 8 contacts the positive electrode 9, the electric charge accumulated in the positive electrode pin 17a moves from the grounding spring 8 to the case 2 and is grounded. The electric charge accumulated in the positive electrode plate 15 moves to the positive electrode pin 17a, and is grounded from the positive electrode pin 17a via the grounding spring 8 and the case 2. The electric charge accumulated in the other positive electrode pin 17 moves to the positive electrode pin 17a via the positive electrode plate 15, and is grounded from the positive electrode pin 17a via the grounding spring 8 and the case 2. You.

Therefore, according to this embodiment, when the door 7 is closed and the electrostatic precipitator 11 is driven,
Since the square pipe 12 and the door portion 7 are electrically connected via the pressing spring 9 or the like, it can be easily grounded with a simple structure when driven. Further, since the pressing spring 9 is formed of an elastic member, it is possible to eliminate an impact caused by abutting on the square pipe 12 when the door portion 7 is closed, for example. In addition, since the square pipe 12 as a dust collecting electrode is formed in the square cylindrical body, the pressing spring 9 can easily and reliably contact the square pipe 12.

Further, when the power is turned off and the door 7 is opened,
During the opening operation, the ground spring 8 contacts the metal rod 19 of the positive electrode pin 17a. Therefore, the positive charges accumulated in the positive electrode plate 15 and each positive electrode pin 17 can be grounded via the ground spring 8 and the case 2 when the door 7 is opened. Further, since the grounding spring 8 is formed of an elastic member such as a coil spring, the metal rod 1
Even after the door portion 7 is further rotated after the engagement with the metal member 9, the ground spring 8 bends, so that the metal bar 19 can be prevented from being damaged and the contact with the metal bar 19 can be prevented while bending for a while. The positive electrode pin 17 and the positive electrode plate 15 can be reliably grounded.

Since the earth spring 8 and the pressing spring 9 are provided on the door 7, the + electrode pin 17 and the + electrode plate 15 can be easily opened and closed based on the opening and closing of the door 7.
In addition, the square pipe 12 can be easily grounded, and the efficiency of the grounding operation can be improved. As described above, since the efficiency of the grounding operation is improved,
When performing various operations such as maintenance of the electrostatic precipitator 11 by opening the door, the operations can be performed efficiently and quickly.

The present invention is not limited to the above-described embodiment, and can be implemented as follows with appropriate modifications without departing from the spirit of the invention. (1) In the above embodiment, a plurality of stages of electrostatic precipitators 11 may be provided in the case 2. In this case, a plurality of grounding springs 8 and pressing springs 9 are attached to the door portion 7 corresponding to the respective electrostatic precipitators 11.

[0032]

(2) In the above embodiment, the ground spring 8 may be formed of a metal plate-shaped elastic thin plate. Alternatively, it may be formed from a leaf spring. It can be formed easily and can be easily attached as compared with the case where it is constituted by a coil spring.

(3) In the above embodiment, the electrostatic precipitator 1 is mounted on a cutting machine or the like, but may be mounted in various rooms such as a clean room. (4) In the above embodiment, the present invention may be applied to an electrostatic precipitator in which the fan 6 is not provided.

(5) In the above embodiment, the metal rod 19 is fixed to the head 18a of the positive electrode pin 17a located at the corner A. The grounding spring 8 is directly connected to the head 18a using the positive electrode pin 17a having a length approximately equal to the length of the metal rod 19 without using the metal rod 19. 18a.

(6) In the above embodiment, the positive electrode pin 17
Is projected from below the square pipe 12, but the lower end of the positive electrode pin 17 and the lower end of the square pipe 12 may be flush. Further, the lower end of the positive electrode pin 17 may be located in the square pipe 12 without protruding from the lower end of the square pipe 12.

(7) In the above embodiment, the grounding operation on the positive electrode pin 17 side was performed based on the opening operation of the door portion 7.
As shown in FIGS. 3 and 4, a lock mechanism 21 is provided on a lid B attached to the upper part of the case 2, and a positive electrode pin is provided based on the operation of a key 22 used in the lock mechanism 21. The grounding work on the 17 side may be performed.

That is, the opening 24 is formed in the upper plate 23 of the case 2.
Are formed. In addition, a lid B is detachably disposed on the upper part of the case 2 to close the opening 24. Then, the lock mechanism 2 is attached to the upper plate portion 25 of the lid B.
1 is provided. The lock mechanism 21 includes an outer frame 26,
The rotating shaft 27 and the rotating shaft 27 inserted into the outer frame 26
And a rectangular lock plate 28 and the like fixed to the base plate. Further, a connecting rod 29 is fixed to the rotating shaft 27, and the ground spring 8 is attached to a lower end of the connecting rod 29 via a bracket 29a.

As shown in FIG. 4, the lock mechanism 21 is locked by the engagement of the lock plate 28 with the lower surface of the upper plate 23. That is, the lid B is fixed to the case 2. At this time, the ground spring 8 is separated from the metal rod 19.

In this state, the key 22 is inserted into the groove 27a formed in the rotation shaft 27, and the rotation shaft 27 is rotated together with the key 22 in the direction of arrow Y. Then, the lock plate 28 and the ground spring 8 rotate together with the rotation shaft 27 in the arrow Y direction. Then, the lock plate 27 is released from the engagement with the upper plate 23, the lock state of the lock mechanism 21 is released, and the grounding spring 8 comes into contact with the metal rod 19, so that the electrode on the positive electrode pin 17 side Is grounded.

As described above, the electrode on the positive electrode pin 17 side can be easily grounded simply by rotating the key 22 in order to release the locked state of the lock mechanism 21. That is, when performing maintenance work or the like of the electrostatic precipitator 11 in the case 2 by removing the cover B, the electrode on the positive electrode pin 17 side is grounded only by releasing the lock of the lock mechanism 21. , Work efficiency can be improved.

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. (1) in an electrostatic precipitator according to claim 2 or 3, wherein the second
Is a pressing spring 9.

According to this electrostatic precipitator, since the pressing spring 9 having elasticity comes into contact with the square pipe 12, it is possible to prevent the square pipe 12 from being damaged when the door 7 is opened and closed. (2) in the electrostatic precipitator according to claim 1 or 3 wherein the first
Is a ground spring 8 composed of a coil spring as an elastic member.

According to this electrostatic precipitator, the ground spring 8
Can be bent, so that the + electrode pin 17 can be prevented from being damaged. The term “square tubular body” used in the present specification is defined as follows.

"Square cylindrical body" means a hollow cylindrical body having a square cross section. Not only the square pipe having a square cross section shown in the above embodiment, but also various rectangular shapes such as a rectangle and a rhombus in cross section are used. And further includes a cylinder having a polygonal cross-sectional shape such as a regular triangle and a regular hexagon.

[0046]

As described above in detail, according to the first aspect of the present invention, when the door is opened, the electric charge accumulated in the discharge electrode via the first conductor member made of the elastic member . The charge can be easily grounded. Further, due to the elastic force of the first conductor member,
After contacting the discharge electrode,
This can prevent damage to the discharge electrode, etc.
Can maintain contact with the discharge electrode during
Charged electric charges can be reliably grounded. According to the second aspect of the invention, the electric charge accumulated in the dust collecting electrode can be easily grounded via the second conductor member when the door is closed. According to the third aspect of the present invention, the electric charge accumulated in the discharge electrode and the dust collecting electrode based on the opening / closing operation of the door portion can be easily grounded via the first conductor member or the second conductor member. Claim 4
According to the invention described above, when the lid member is attached to the case, the rotation axis of the lock mechanism provided on the lid member is rotated to release the lock, and the accumulated rotation is accumulated in the discharge electrode. The electric charge can be easily grounded via the first conductor member.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of an electrostatic precipitator according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the electrostatic precipitator in one embodiment.

FIG. 3 is a side sectional view of an electrostatic precipitator in another example.

FIG. 4 is a partially cutaway plan view showing the operation of an electrostatic precipitator in another example.

[Explanation of symbols]

2 ... Case, 7 ... door portion, 8 ... first ground spring and the conductor member, 9 ... pressing spring as a second conductive member,
12 ... square pipe as the dust collection electrode, 1 7 ... discharge of the electrode positive pole electrode pin, 21 ... lock mechanism, 24 ... opening, 27
... Rotating shaft, B ... Lid as lid member.

Continuation of front page (56) References JP-A-57-180447 (JP, A) JP-A-1-167344 (JP, U) JP-A-48-1273 (JP, U) JP-A-48-64871 (JP) , U) Jikken 49-22056 (JP, Y1) (58) Fields studied (Int. Cl. ⁶ , DB name) B03C 3/00-3/88

Claims (4)

(57) [Claims] 1. An electrostatic precipitator provided with an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case, and the case being provided with a door part which is opened and closed by turning. The first part comprises a first elastic member which is separated from the discharge electrode when the door is closed, and is in contact with the discharge electrode when the door is opened.
Electrostatic precipitator provided with the conductor member of the above. 2. An electrostatic precipitator having an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case and having a door part which is opened and closed by rotating the case. An electrostatic precipitator provided with a second conductor member that contacts the dust collecting electrode when the door is closed and separates from the dust collecting electrode when the door is open. 3. An electrostatic precipitator provided with an electrostatic precipitator having a discharge electrode and a precipitating electrode in a case, and the case provided with a door portion which is opened and closed by turning. The part is separated from the discharge electrode when the door part is closed,
A first conductor member is provided for contacting the discharge electrode when the door is opened, and a second conductor that contacts the dust collection electrode when the door is closed and separates from the dust collection electrode when the door is open. An electrostatic precipitator provided with a conductor member. 4. An electrostatic precipitator having a discharge electrode and a dust collecting electrode is provided in a case, and an opening is formed in the case and a cover member for closing the opening is attached to the case. Is an electrostatic precipitator provided with a lock mechanism that locks the lid member to the case based on the rotation of the rotation shaft. The rotation shaft of the lock mechanism rotates together with the rotation shaft to lock the lock state. An electrostatic precipitator to which a first conductor member is fixed, which is sometimes separated from the discharge electrode and is in contact with the discharge electrode when the rotating shaft for releasing the locked state is rotated.