JP6038760B2 - Electrostatic dust collector discharge electrode striking device - Google Patents

Description

  The present invention provides a discharge electrode for an electrostatic precipitator that can be properly beaten without adjustment at the time of installation even when a part of the discharge hammer is replaced. It relates to a strike device.

For example, in an electrostatic precipitator installed in a thermal power plant, there is a discharge electrode striker for an electrostatic precipitator that removes dust adhering to the discharge electrode by hammering the discharge electrode with a strike hammer. It is arranged. Specifically, the electrostatic precipitator is provided with a plurality of discharge electrodes arranged side by side, and the discharge electrode striker of the electrostatic precipitator has a plurality of striking hammers corresponding to each discharge electrode. They are arranged side by side. And, the discharge hammering device of the electrostatic precipitator is such that each hammer is lifted by swinging as the driving shaft is rotated by a driving source, and when it reaches a predetermined position (highest point), it falls by its own weight. The drive source and drive shaft are adjusted so that each discharge electrode is beaten simultaneously.
By the way, the technique regarding the electric dust collector which improves the peeling characteristic of the dust from a dust collection electrode and raises dust collection efficiency is proposed (for example, refer patent document 1). This electrostatic precipitator has a discharge electrode side contact that is electrically connected to the discharge electrode, and falls at a timing earlier than the fall of the hammer, and closes the discharge electrode close to the discharge electrode side contact during the fall. A ground side contact that can be grounded is provided. Moreover, the technique regarding the electric dust collector which improves the dust collection efficiency by removing the dust adhering to a discharge electrode efficiently is proposed (for example, refer patent document 2). This electrostatic precipitator is electrically connected to the ground contact and the discharge electrode, and in conjunction with the drop operation of the discharge electrode hammer, closes the discharge electrode close to the ground contact. A discharge electrode side contact.

JP 2002-200388 A JP 2002-248376 A

  By the way, the strike hammer of the discharge electrode striker of the electric dust collector needs to be replaced due to deterioration over time, and an existing strike hammer and a new strike hammer having different specifications are mixed. When the existing hammer is dropped from its highest point by its own weight, the drive source and drive shaft have been adjusted so that the existing hammer can be reached by its own weight. Had to be adjusted in the field to strike the discharge electrode properly. Such adjustment work depends on the skill level of the operator.

  Further, the discharge electrode striking device of the electrostatic precipitator has a slight shift in the driving source and the driving shaft due to aging. For this reason, there is a possibility that the new striking hammer may not reach the discharge electrode due to a slight shift in the drop position when it is dropped by its own weight.

  However, in any of the techniques described in the patent literature, when an existing hammering hammer and a new hammering hammer with different specifications are mixed, the new hammer properly strikes the discharge electrode. Adjustment is necessary on site. In addition, when a drive source or a drive shaft is displaced due to deterioration over time, adjustment is required so that a new hammer strikes the discharge electrode appropriately.

  Therefore, the present invention solves the above-described problems, and even when a part of the discharge electrode striking device of the electric dust collector is replaced, the electric dust collector is suitable for striking and does not require adjustment during installation. An object of the present invention is to provide a discharge electrode striking device.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a hammer portion that strikes a discharge electrode of an electric dust collector, an arm portion provided with one end side of the hammer portion, and another arm portion. A hammer provided with a claw portion provided on an end side, and the arm portion is supported so as to swing when the hammer strikes the discharge electrode by rotating and lifting to hammer the hammer. And a regulating means that is disposed at a position facing the claw portion and regulates a swing range of the hammer with respect to the drive shaft by contacting the claw portion, the drive shaft comprising: When the hammer is rotated in a predetermined direction to lift the hammer in the rotational direction and rotated to a predetermined angle, the driving is released and the hammer is rotated in a direction opposite to the predetermined direction by the weight of the hammer to drop the hammer. The hammer falls The hammer in Rutoki the swing range of the hammer so as to reach the discharge electrode is set, it is discharged Gokutsuchi punching device of an electric precipitator according to claim.

According to the present invention, the restricting means restricts the swing of the hammer when the drive shaft rotates in a predetermined direction, lifts the hammer around the drive shaft, and releases the restriction of the hammer when the drive shaft rotates to a predetermined position. It rotates in the opposite direction and drops due to its own weight, and the hammer reaches the discharge electrode.

The invention according to claim 2 is the discharge electrode striking device of the electrostatic precipitator according to claim 1, wherein the regulating means swings from vertically below to the discharge electrode side when the hammer falls by its own weight. A space portion is formed between the claw portions so as to be possible.

  According to a third aspect of the present invention, in the discharge electrode striking device for an electrostatic precipitator according to the second aspect, the restricting means is curved to form a space portion.

  According to the first aspect of the present invention, the regulating means sets the swing range of the hammer so that the hammer reaches the discharge electrode when the hammer falls due to its own weight. Even if new hammering hammers having different values are mixed, the new hammer can properly strike the discharge electrode. That is, even when existing hammering hammers and new hammering hammers having different specifications are mixed, no special adjustment is required, so that labor and time can be reduced.

  According to the second aspect of the present invention, when the hammer falls due to its own weight, the restricting means has a space formed between the hammer and the hammer so that the hammer can swing from the vertically lower side to the discharge electrode side. Therefore, the new hammer can strike the discharge electrode appropriately with a simple configuration. Thereby, it can attach easily. Further, by adjusting the size of the space portion, it can be attached to any discharge apparatus of the electric dust collector.

  According to the third aspect of the present invention, since the regulating means is curved and the space portion is formed, the processing is easy. That is, since it is not necessary to adjust the regulating means on site, it can be more easily attached to the discharge electrode striking device of the electric dust collector.

It is a perspective view of the discharge electrode striking device of the electrostatic precipitator according to the embodiment of the present invention. It is a front view which shows the discharge electrode strike device of the electric dust collector of FIG. It is a side view which shows the discharge electrode strike device of the electric dust collector of FIG. It is a side view which shows the discharge electrode striking device of the electric dust collector of FIG. 1, and has shown the state which a drive shaft rotates and a striking hammer lifts. It is a side view which shows the discharge electrode striking device of the electric dust collector of FIG. 1, and has shown the state which a drive shaft rotates and a striking hammer lifts. It is a side view which shows the discharge electrode striking device of the electric dust collector of FIG. 1, and has shown the state which the drive shaft rotated and the striking hammer was lifted to the highest point. It is a side view which shows the discharge electrode striking device of the electric dust collector of FIG. 1, and has shown the state which a drive shaft rotates and a striking hammer falls from the highest point. It is a side view which shows the conventional hammering hammer. It is a front view which shows the state in which the discharge electrode striking device of the electric dust collector of FIG. 1 was installed.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 9 is a front view showing a state in which the discharge electrode striking device 1 of the electric dust collector is installed in the electric dust collector (not shown). A discharge electrode striking device 1 of this electric dust collector includes a plurality of existing striking hammers (existing hammers) 200 and a new striking hammer (hammer) 2 on a drive shaft 100 rotated by a drive source (not shown). Are arranged in a mixed state. The existing hammer 200 and the new hammer 2 are disposed at a predetermined interval on the drive shaft 100 so as to correspond to the discharge electrode 110 of the electric dust collector. In this embodiment, the existing hammer 200 and the new hammer 2 are lifted up to the highest point when the drive shaft 100 rotates counterclockwise (in the direction of the arrow in the figure), and falls onto the arc clockwise by its own weight. At the same time, each discharge electrode 110 is beaten.

  The existing hammer 200 strikes the discharge electrode 110 of the electrostatic precipitator. As shown in FIGS. 8 and 9, the hammer portion 210 is held between the lower end portions of the rectangular mounting plates 201 and 202. In the state, it is fixed by the fastening members 211 and 212. The existing hammer 200 is swingably disposed on the support fitting 300 via the swing shaft 203. The support fitting 300 is fixed to the drive shaft 100 by a fixing pin 301 and rotates together with the drive shaft 100. The stopper 400 is disposed on the discharge electrode 110 side of the upper end portions of the mounting plates 201 and 202. When the drive shaft 100 rotates counterclockwise, the existing hammer 200 is lifted by the hammer portion 210 coming into contact with the stopper 400 and lifted to the highest point. When the hammer part 210 reaches the highest point, it falls while drawing a circular arc clockwise by its own weight, and strikes the discharge electrode 110.

  The new hammer 2 strikes the discharge electrode 110 of the electric dust collector, and is replaced when the existing hammer 200 has deteriorated over time. The new hammer 2 is formed in a pendulum shape as shown in FIGS. 1 to 3, and mainly includes a hammer portion 21, an arm portion 22, swinging shafts 23A and 23B (not shown), and a claw portion 24. It has. The hammer portion 21 is formed in a disc shape having a predetermined thickness, and is disposed so that the outer peripheral surface portion can strike the discharge electrode 110. In FIG. 3, the swing shafts 23 </ b> A and 23 </ b> B are configured by a swing shaft 23 </ b> A that is horizontally formed forward from the arm portion 22 and a swing shaft 23 </ b> B that is horizontally formed rearward from the arm portion 22. ing. The hammer portion 21 is swingable with respect to the support fitting 3 by the swing shafts 23A and 23B. The claw portion 24 is formed above the arm portion 22 and above the swing shafts 23A and 23B. In a state where the new hammer 2 is attached to the discharge electrode striking device 1 of the electric dust collector, the claw portion 24 abuts on the inner peripheral surface of the curved plate 41 of the stopper 4 to be described later, so that the swing range of the new hammer 2 is increased. It comes to regulate.

  In this embodiment, as shown in FIG. 3, the new hammer 2 has the swing shafts 23A and 23B of the new hammer 2 positioned vertically below the drive shaft 100, and the new hammer 2 and the support bracket 3 are positioned vertically downward. The hammer portion 21 is attached so as to strike the discharge electrode 110 in a state where the discharge electrode 110 is hit.

  As shown in FIGS. 1 to 3, the support fitting 3 is formed into two parts, and is parallel to the first insertion part 31 through which the drive shaft 100 can be inserted and the axial direction of the first insertion part 31. Formed between the first insertion portion 31 and the second insertion portions 32A and 32B. The second insertion portions 32A and 32B can be inserted through the swing shafts 23A and 23B of the new hammer 2, respectively. A flat surface portion 33. The drive shaft 100 is inserted into the first insertion portion 31, the swing shaft 23A of the new hammer 2 is inserted into the second insertion portion 32A, and the swing shaft is inserted into the second insertion portion 32A. It is fastened by fastening bolts 42 and 43 of the stopper 4 to be described later in a state where 23B is inserted. At this time, the base end portion 22A of the arm portion 22 is located between the second insertion portion 32A and the second insertion portion 32B, and above the second insertion portion 32A and the second insertion portion 32B. The nail | claw part 24 protrudes. The support bracket 3 rotates with the rotation of the drive shaft 100, and the new hammer 2 is disposed so as to be swingable with respect to the support bracket 3.

  The stopper 4 as the restricting means restricts the swing range of the new hammer 2 with respect to the drive shaft 100. As shown in FIG. 1, a curved plate 41 processed so as to bend the central portion of a rectangular flat plate is provided. A space S is formed on the inner surface side of the curved plate 41. As shown in FIG. 3, the curved plate 41 is disposed on the side opposite to the discharge electrode 110 of the flat portion 33 of the support fitting 3.

  The space S regulates the swing range of the claw portion 24 of the new hammer 2, and the claw portion 24 of the hammer 2 can be accommodated in the space S when the curved plate 41 is attached to the support fitting 3. The claw portion 24 can swing in the space S along with the swing of the hammer 2. Specifically, for example, in FIG. 3, when the drive shaft 100 tries to rotate counterclockwise (in the direction of the arrow in the figure), the claw portion 24 moves the space S in the curved plate 41 to the right in the figure clockwise. The claw portion 24 is prevented from swinging when it swings in the direction and comes into contact with the inner peripheral surface, so that the hammer portion 21 of the new hammer 2 is raised to the highest point along with the rotation of the drive shaft 100. In FIG. 3, when the hammer portion 21 of the new hammer 2 attempts to swing leftward about the swing shafts 23 </ b> A and 23 </ b> B in the figure, the claw portion 24 is placed in the curved plate 41. When the space S is swung clockwise in the drawing and comes into contact with the inner peripheral surface, the swing of the claw portion 24 is restricted.

  When the drive shaft 100 rotates in a predetermined direction, the space S restricts the swing of the new hammer 2 and lifts it around the drive shaft 100. When the drive shaft 100 rotates to a predetermined angle, the restriction of the new hammer 2 is released. The size and shape of the space S are set so that the new hammer 2 can reach the discharge electrode 110 side from below in the vertical direction.

  Next, the operation of the discharge electrode striking device 1 of the electrostatic precipitator having such a configuration will be described.

  The discharge electrode striking device 1 of the electrostatic precipitator is adjusted such that the position and angle of the drive source and the drive shaft 100 are adjusted so that the existing hammer 200 reaches the discharge electrode 110 when it falls from its highest point by its own weight. Yes. When it is discovered that the existing hammer 200 has deteriorated over time in the discharge electrode striking device 1 of the electric dust collector, the deteriorated existing hammer 200 is removed and replaced with the new hammer 2 as shown in FIG. At this time, as shown in FIG. 3, the swing shafts 23 </ b> A and 23 </ b> B of the new hammer 2 are positioned vertically below the drive shaft 100 and the new hammer 2 extends vertically downward. It is attached to strike.

  Thereafter, the drive shaft 100 is rotated counterclockwise by the drive source at predetermined time intervals. As shown in FIG. 4, in a state where the drive shaft 100 is rotated about 30 ° counterclockwise, the support fitting 3 is rotated counterclockwise together with the drive shaft 100 and is inserted into the second insertion portions 32A and 32B. The rocking shafts 23A and 23B thus lifted are lifted. At this time, since the claw portion 24 is not in contact with the inner peripheral surface of the curved plate 41, the arm portion 22 is free, and the hammer portion 21 is suspended vertically downward from the swing shafts 23A and 23B by its own weight. ing.

  As shown in FIG. 5, when the drive shaft 100 is rotated approximately 90 ° counterclockwise, the support fitting 3 is rotated counterclockwise together with the drive shaft 100, and the second insertion portions 32A and 32B are rotated. The new hammer 2 is lifted through the swing shafts 23A and 23B inserted into the shaft. At this time, the claw portion 24 is in contact with the inner peripheral surface of the curved plate 41, and the swing of the new hammer 2 is restricted.

  As shown in FIG. 6, when the drive shaft 100 is rotated approximately 180 ° counterclockwise, the support fitting 3 is rotated counterclockwise together with the drive shaft 100, and the second insertion portions 32A and 32B are rotated. The new hammer 2 is lifted up to the highest point through the swinging shafts 23A and 23B inserted through. At this time, the claw portion 24 is in contact with the inner peripheral surface of the curved plate 41, and the swing of the new hammer 2 is restricted.

  At this time, the other existing hammer 200 and the new hammer 2 arranged on the drive shaft 100 also reach the highest point at the same time.

  Then, as shown in FIG. 7, the new hammer 2 that has reached the highest point is released from the regulation, falls while drawing a circular arc clockwise by the weight of the hammer portion 21, and the discharge electrode 110 is beaten. Here, when the hammer portion 21 strikes the discharge electrode 110, the space S of the curved plate 41 of the stopper 4 swells on the opposite side to the discharge electrode 110, so that the claw portion 24 can swing to the right. Therefore, the hammer portion 21 can swing to the discharge electrode 110 side from the vertically lower side. In other words, even if the drive shaft 100 is slightly displaced and the new hammer 2 does not reach the discharge electrode 110, the hammer portion 21 swings to the discharge electrode 110 side. It can be reached.

  Thus, the discharge electrode striking device 1 of the electric dust collector is controlled such that the drive shaft 100 is rotated counterclockwise to a predetermined angle by the drive source at predetermined time intervals, and the existing hammer 200 and the new hammer 2 are controlled. At the same time, the discharge electrode 110 is repeatedly beaten.

  As described above, according to the discharge electrode striking device 1 of the electrostatic precipitator, the stopper 4 can move the swing range of the new hammer 2 so as to reach the discharge electrode 110 when the new hammer 2 drops due to its own weight. Therefore, even if the existing hammer 200 and the new hammer 2 having different specifications are mixed, the new hammer 2 can appropriately strike the discharge electrode 110. That is, even if the existing hammer 200 and the new hammer 2 are mixed, no special adjustment is required, so that labor and time can be reduced.

  Further, when the new hammer 2 is dropped by its own weight, a space S is formed between the stopper 4 and the new hammer 2 so as to be swingable from the lower side to the discharge electrode 110 side. Thus, the new hammer 2 can strike the discharge electrode 110 appropriately. As a result, in the discharge electrode striking device 1 of the electrostatic precipitator, when the existing hammer 200 is deteriorated over time and replaced with the new hammer 2, no adjustment is required on the site, so that it does not depend on the skill level of the operator. Anyone can easily replace it. Further, by adjusting the size of the space S of the curved plate 41, it can be attached to the discharge electrode striking device 1 of any electric dust collector. For example, when the deviation generated in the drive shaft 100 of the discharge electrode striking device 1 of the electrostatic precipitator is large, the curved plate 41 is processed into a greatly curved shape to increase the space S, whereby the new hammer 2 is The discharge electrode 110 can be hit appropriately.

  Furthermore, the stopper 4 is processed so as to bend the central portion of the rectangular flat plate, and the space S is formed. Therefore, the processing is easy.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, the curved plate 41 has been described so as to form the space S with the claw portion 24. However, if the space S is formed with the claw portion 24, the curved plate is used. Of course, it is not limited to 41. For example, the stopper 4 is constituted by a rectangular (not curved) pressing plate, and a spacer disposed between the pressing plate and the flat surface portion 33 of the support fitting 3. A space S may be formed between the two.

1 Electrostatic dust collector discharge electrode striking device 2 New hammer (hammer)
21 Hammer 22 Arm 24 Claw 3 Supporting Bracket 4 Stopper (Regulator)
41 Curved plate S Space (space part)
100 Drive shaft 110 Discharge electrode 200 Existing hammer (existing hammer)

Claims (3)

A hammer provided with a hammer part for striking the discharge electrode of the electric dust collector, an arm part provided with the hammer part on one end side, and a claw part provided on the other end side of the arm part ;
A drive shaft that rotates and lifts to strike the hammer and supports the arm portion so that the hammer swings when striking the discharge electrode;
A regulating means that is disposed at a position facing the claw portion and regulates a swing range of the hammer relative to the drive shaft by contacting the claw portion ;
With
The drive shaft rotates in a predetermined direction to lift the hammer, and when rotated to a predetermined angle, the drive is released and rotated in the opposite direction to the predetermined direction by the weight of the hammer to drop the hammer,
The restricting means has a swing range of the hammer so that the hammer reaches the discharge electrode when the hammer falls.
A discharger striking device for an electrostatic precipitator. The restricting means is formed with a space portion between the claw portion so as to be able to swing from the vertically lower side to the discharge electrode side when the hammer falls by its own weight.
The discharge electrode striking device for an electrostatic precipitator according to claim 1. The regulating means is curved to form a space portion,
The discharge electrode striking device for an electrostatic precipitator according to claim 2.

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