JP4849273B2 - H type protector for discharge electrode of dry type electrostatic precipitator - Google Patents

Description

  The present invention relates to a discharge electrode H-shaped protector for reinforcing a discharge electrode of a dry electrostatic precipitator.

The discharge electrode of the dry electrostatic precipitator applies an electric field to the dust collecting plate, charges the dust passing through the electric field region, and collects the dust on the dust collecting plate by Coulomb force. Not only the dust plate but also the discharge electrode adheres to the dust collecting ability. Therefore, in order to restore the dust collecting ability, it is necessary to periodically remove dust attached to the discharge electrode as well as the dust collecting plate. FIG. 4 shows a discharge electrode of a dry electrostatic precipitator according to the prior art. The discharge electrode 50 is formed in a discharge frame 52 formed by using a discharge frame vertical pipe 52a and a discharge frame horizontal pipe 52b, and the discharge frame horizontal pipe 52b is used as an upper end and a lower end. A through hole (not shown) is formed in a direction perpendicular to the interval, and a discharge line 54 having the same length as the discharge frame vertical pipe 52a is passed through the through hole (not shown) from the vertical direction. It is formed by driving a wedge (not shown) into a gap between the discharge line 54 and the discharge line 54. A striking rod 56 is formed in the middle stage of the discharge frame. The striking rod 56 is hit with a hammer, and dust attached to the discharge electrode 50 is removed by the impact (see Patent Document 1).
JP 2006-7150 A

  However, a portion 58 (a portion surrounded by a broken line in FIG. 4) perpendicular to the discharge line 54 of the discharge frame horizontal pipe 52b adjacent to the strike rod 56 is a portion that receives the stress due to the impact from the hammer most strongly. There are times when this is repeatedly received and damage such as cracking and cutting occurs. When such damage occurs, the strength of the discharge frame decreases, making it difficult to hold the discharge electrode in a stable position in the apparatus, such as a decrease in dust collection capability, a short circuit between the discharge electrode and the dust collection plate, etc. A problem occurs. However, it is costly to replace the entire discharge electrode only by partially damaging the discharge electrode. Although it is possible to reinforce the discharge electrode by repairing the damaged part by welding, the work load becomes a problem because the distance between the discharge electrode and the dust collecting plate is narrow.

  Accordingly, the present invention provides an H-shaped protector for a discharge electrostatic precipitator for a dry electrostatic precipitator that effectively reinforces a partially damaged discharge electrode with a simple structure and without imposing a large work load. .

In order to achieve the above object, an H-type protector for a discharge electrode of a dry electrostatic precipitator according to the present invention includes a pair of H-shaped plates having two column portions and a connecting portion that connects the column portions. comprising a Jo body, the plate-like body is formed in the longitudinal direction of the front Symbol connecting part has a V-shaped cross-section, the side surface of the discharge frame abuts capable sandwiching the discharge frame a groove, wherein When the widthwise ends of the connecting portions notch cut out together with the groove, anda bolt holes top and formed in a lower portion of the pillar portion, is opposed to the plate-like body, by the groove that face each other A discharge line that sandwiches the discharge frame and perpendicularly intersects the discharge frame passes through a through hole that is formed with the notch formed as an opening between the coupling portions facing each other, and is capable of penetrating the discharge line. bolts tighten sandwich the conductive frame and said discharge line, said discharge frame It is characterized by being fixed and reinforced by the plate-like body.

  According to the discharge electrode H-type protector for the dry electrostatic precipitator according to the present invention, the side surface of the discharge frame constituting the discharge electrode contacts the V-shaped side surface forming the groove of the plate-like body. Therefore, when the discharge frame is sandwiched between a pair of plate-like bodies, the side surfaces of the discharge frame come into contact with four side faces including one V-shaped side face and the other V-shaped side face. Can be fixed. In addition, when the diameter of the discharge frame having a circular cross section changes, the contact position with the discharge frame on the side surface of the groove changes, but the contact with the discharge frame is maintained, so discharges with various diameters are maintained. The frame can be fixed. Further, since the discharge line does not interfere with the plate-like body due to the notch formed in the plate-like body, it is possible to avoid an adverse effect of the plate-like body on the discharge line. Further, by sandwiching a portion of the discharge frame where damage is predicted between the plate-like bodies, the entire discharge frame including the plate-like body is not lowered in rigidity, and it is possible to maintain the effect of dust removal by beating.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

  A schematic diagram of an H-shaped protector for discharge electrodes of a dry electrostatic precipitator according to this embodiment is shown in FIG. The discharge electrode H-type protector 10 of the dry electrostatic precipitator according to the present embodiment is formed in a longitudinal direction of the connecting portion 16 at a pair of H-shaped flat plate 14 and the connecting portion 16 of the flat plate, and is V-shaped. A groove 18 that is in contact with the side surface of the discharge frame 26 and can sandwich the discharge frame 26, and is formed on the same plane as the groove 18 in the center of the connecting portion 16, and is perpendicular to the longitudinal direction. A notch 20 for forming a through hole 30 into which a discharge line 28 perpendicular to the discharge frame 26 can be inserted, and a bolt hole 24 formed at an upper part and a lower part of the column part 22 of the flat plate 14; The plate-like body 12 is formed by facing the plate-like body 12, sandwiching the cylindrical discharge frame 26 and the discharge wire 28, and bolting, and fixing the discharge frame 26 by the plate-like body 12. In particular, the discharge frame 2 The orthogonal portion 40 of the discharge line 28 of, even Should a crack occurs, is to reinforce the crack prediction unit 60.

  FIG. 2 shows a schematic view of a plate-like body constituting this embodiment. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a left side view. The H-shaped flat plate 14 constituting the plate-like body 12 includes two parallel column portions 22 and a connecting portion 16 that connects the column portions 22. The material of the flat plate 14 is not particularly limited as long as it has a certain rigidity and is resistant to corrosion by acid, and stainless steel or the like can be used. Further, the size of the flat plate 14 is such that the column portion 22 of the flat plate 14 has such a size that the discharge frame 26 does not interfere with a bolt hole 24 described below at the upper and lower portions thereof, and the connecting portion 16 of the flat plate 14 is It suffices to have a dimension that allows the discharge line 28 to be inserted between the two column portions 22. On the other hand, the length of the connecting portion 16 needs to have a dimension that can sufficiently reinforce the discharge frame 26 when the discharge frame 26 is sandwiched between the plate-like bodies 12. It is assumed that the thickness of the flat plate 14 has a dimension that can secure rigidity to such an extent that the plate-like body 12 is not deformed by bolting described later. Further, it is desirable that the flat plate 14 be chamfered, deburred, etc., for the safety of the mounting operation.

  A groove 18 having a V-shaped cross section is formed on one surface of the connecting portion 16 on the center line in the longitudinal direction of the connecting portion. The groove 18 is configured to sandwich the discharge frame 26 between the plate-like bodies 12 including the pair of flat plates 14 by bringing the cylindrical discharge frame 26 into contact with two side surfaces constituting the groove 18. At this time, the discharge frame 26 is simultaneously in contact with the four side surfaces constituting the groove 18.

であることが必要である。ｔ_０が数式１の範囲より短い場合は、溝１８の側面と放電枠２６とは当接せず、溝１８の側面と平板１４の平面部分との境界である角の部分と放電枠２６とが当接する。この条件でも一対の板状体１２で放電枠２６を挟み込むことが可能であるが、放電枠２６と板状体１２との当接部分は放電枠２６の断面方向からみて点（放電枠２６の長手方向からみて線）状であり、放電枠２６を挟み込んでボルト止めすると放電枠２６を傷める虞があるため、この条件で放電枠２６挟み込むことは好ましくない。一方。ｔ_０が数式１の範囲より長い場合は、板状体１２で放電枠２６を挟み込んでも、溝１８の４つの側面に同時に当接せず、溝１８によって囲まれた空間で放電枠２６に空間的な遊びが生じ、放電枠２６を固定することはできない。一方、ｔ_０とθが一定の場合すなわち板状体１２に形成された溝１８の断面寸法を一定とした場合、ｒは数式１を満たす範囲、すなわち数式１を変形させ、

の範囲に半径ｒが存在する限り、一対の板状体１２の溝１８の４つの側面が放電枠２６の側面と同時に当接する。よって一の板状体１２について様々な径の放電枠２６を適切に挟み込むことができる。 FIG. 3 is a schematic view showing the relationship between the groove 18 formed in the plate-like body and the discharge frame 26. As shown in FIG. 3, the cross section of the discharge frame 26 is a circle having a radius r centered on O, the depth of the groove 18 is t ₀ , and the angle formed by the two side surfaces having the V-shaped cross section of the groove 18 is defined. Assuming that 2θ (0 <θ <90 °), in order for the four side surfaces of the grooves 18 of the pair of plate-like bodies 12 to abut simultaneously with the side surfaces of the discharge frame 26,

It is necessary to be. When t ₀ is shorter than the range of Equation 1, the side surface of the groove 18 and the discharge frame 26 do not come into contact with each other, the corner portion that is the boundary between the side surface of the groove 18 and the flat portion of the flat plate 14, and the discharge frame 26. Abut. Even under this condition, it is possible to sandwich the discharge frame 26 between the pair of plate-like bodies 12, but the contact portion between the discharge frame 26 and the plate-like body 12 is a point (of the discharge frame 26 as viewed from the cross-sectional direction of the discharge frame 26. If the discharge frame 26 is pinched and bolted, the discharge frame 26 may be damaged. Therefore, it is not preferable to sandwich the discharge frame 26 under these conditions. on the other hand. When t ₀ is longer than the range of Formula 1, even if the discharge frame 26 is sandwiched between the plate-like bodies 12, it does not contact the four side surfaces of the groove 18 at the same time, and the space surrounded by the groove 18 has a space in the discharge frame 26. Play occurs, and the discharge frame 26 cannot be fixed. On the other hand, when t ₀ and θ are constant, that is, when the cross-sectional dimension of the groove 18 formed in the plate-like body 12 is constant, r is a range that satisfies Equation 1, that is, Equation 1 is transformed,

As long as the radius r exists in this range, the four side surfaces of the grooves 18 of the pair of plate-like bodies 12 are in contact with the side surfaces of the discharge frame 26 simultaneously. Therefore, the discharge frames 26 having various diameters can be appropriately sandwiched with respect to the single plate-like body 12.

を満たす必要がある。なお、ｔ_１が数式３を満たさない場合は、放電枠２６は一の溝１８を構成する側面に同時に当接せず、挟み込みができなくなる。 Further, the cross section of the groove 18 does not have to be completely V-shaped, and may be a form in which the deepest portion of the groove 18 is filled as shown in FIG. At this time, the filling thickness t ₁ is

It is necessary to satisfy. When t ₁ does not satisfy Equation 3, the discharge frame 26 does not simultaneously contact the side surface constituting the one groove 18 and cannot be sandwiched.

  On the surface opposite to the surface on which the groove 18 is formed. A convex portion 32 having a shape following the side surface of the groove 18 is formed. That is, the groove 18 and the convex portion 32 are formed at the same time by folding along the short side direction of the arm 16. The side surface of the convex portion 32 has a shape that follows the shape of the side surface of the groove 18. Thereby, the thickness of the flat plate 14 can be designed with a dimension smaller than the depth of the groove 18, and the plate-like body 12 can be made thinner and lighter. Furthermore, since the side surface of the convex portion 32 and the side surface of the groove 18 can be fitted to each other, even if a plurality of the plate-like bodies 12 are overlapped, it is not bulky and portability is improved.

  A cutout 20 is formed in the central portion of the connecting portion 16 in the same plane as the groove 18 and in a direction perpendicular to the groove 18. The notch 20 forms a through hole 30 through which the discharge wire 28 is inserted when the discharge frame 26 is sandwiched between the plate-like bodies 12. Therefore, the depth of the notch 20 only needs to have a dimension that is more than half of the outer shape of the discharge line 28. On the other hand, the dimension of the width of the notch 20 (longitudinal direction of the connecting portion 16) extends to the connecting portion between the connecting portion 16 and the column portion 22. As a result, the cross section of the discharge line 28 becomes sufficiently small with respect to the through-hole 30, so that the discharge position of the plate-like body 12 when the portion orthogonal to the discharge line 28 of the discharge frame 26 is sandwiched between the plate-like bodies 12 is discharged. The degree of freedom in the longitudinal direction of the frame 26 is improved.

  Bolt holes 24 are formed in the upper and lower portions of the column portion 22 of the flat plate 14. The bolt holes 24 are formed symmetrically about the groove 18 and the through hole 30 formed by the notch 20 orthogonal to the groove 18. Thereby, the flat plate 14 which comprises the plate-shaped body 12 can form a pair of flat plate 14 by the same design, and can reinforce the orthogonal part 40 of the discharge frame 26 and the discharge wire 28. FIG.

の間で変化する。ここで、ｔ_０が数式１の左辺のとき、ｔ_２は数式４の右辺となり、ｔ_０が数式１の右辺のとき、ｔ_２は数式４の左辺となる。もちろんボルト止め時には板状体１２が若干変形するため、隙間３８の間隔は一定ではなく、柱部２２の上端及び下端に向かうほどその間隔は小さくなる。なお、ボルト３４、ナット３６は一定の剛性を持ち、腐食に強い材料であれば、どのような材料を用いても良いが、熱膨張等を考慮すると板状体１２と同一の材料を用いることが望ましい。 The bolt 34 has a diameter that can be inserted into the bolt hole 24, and the gap 38 formed between the pair of flat plates 12 when the plate-like body 12 sandwiches the discharge frame 26, the thickness of the flat plate 12, and the bolt 34. It has the length of the dimension which added the thickness of the nut 36 to screw. Here, when the discharge frame 26 is sandwiched between the plate-like bodies 12 and the discharge frame 26 is in contact with all four side surfaces of the groove 18, the interval t _{2 of the} gap 38 is

Vary between. Here, when t ₀ is the left side of Formula 1, t ₂ is the right side of Formula 4, and when t ₀ is the right side of Formula 1, t ₂ is the left side of Formula 4. Of course, since the plate-like body 12 is slightly deformed at the time of bolting, the interval of the gap 38 is not constant, and the interval decreases toward the upper end and the lower end of the column portion 22. The bolt 34 and the nut 36 may be any material as long as they have a certain rigidity and are resistant to corrosion. However, in consideration of thermal expansion, the same material as the plate-like body 12 should be used. Is desirable.

  Based on the above configuration, the operation of the discharge electrode reinforcing H-type protector of the dry electrostatic precipitator according to the present embodiment will be described. First, in a state where the connecting portion 16 is directed sideways and the column portion 22 is directed vertically, the discharge frame 26 and the discharge line 28 in the vicinity of the striking rod in the plate-like body 12 composed of a pair of flat plates 14 as in the above-described prior art. And an orthogonal portion 40 (crack prediction unit 60). At this time, the notches 20 formed in the pair of flat plates 14 are formed with through holes 30, the discharge lines 28 are inserted through the through holes 30, and the direction of the grooves 18 formed in the connecting portion 16 is the longitudinal direction of the discharge frame 26. Suitable for. Then, the bolt holes 24 formed in each of the pair of flat plates 12 face each other to form a through hole (not shown) penetrating the plate-like body 12. Bolts are clamped by passing bolts 34 through the through holes (not shown) and tightening them with nuts 36.

  At this time, a contact portion between the side surface of the discharge frame 26 and the plate-like body 12 extends in the longitudinal direction of the discharge frame 26, and the length thereof is the same as the groove 18 formed in the connecting portion 16. Further, the side surface of the discharge frame 26 is simultaneously in contact with the four side surfaces of the groove 18 of the plate-like body 12 sandwiched oppositely from both directions. As a result, the discharge frame 26 is fixed to the plate-like body 12, and a certain rigidity can be obtained between the plate-like body 12 and the portion of the discharge frame 26 sandwiched between the plate-like bodies 12. Further, since the discharge line 28 is inserted through the through-hole 30, it does not come into contact with the plate-like body 12, and adverse effects on the discharge line 28 such as deterioration of discharge characteristics and disconnection due to the contact can be avoided. Further, in this state, even if a crack is generated in the crack predicting portion 60 and the like in the portion of the discharge frame 26 that contacts the plate 12 in the longitudinal direction, the rigidity of the discharge frame 26 itself is lost. Since the portion is fixed to the plate-like body 12, the rigidity of the portion of the discharge frame 26 where the plate-like body 12 is sandwiched is reinforced as a result.

  Therefore, even if the hammering operation is performed on the striking rod 42 in the vicinity of the above-described reinforcing portion and a certain stress is applied to the reinforcing portion, the plate-like body 12 itself that reinforces the discharge frame 26 is rigid and discharges. Since the frame 26 itself is not stressed, there is no possibility that the discharge frame 26 is deformed as a result. Further, even if a crack is generated in the crack predicting portion 60 in the orthogonal portion 40 of the discharge frame 26, the plate-like body 12 is sandwiched between the plate portion 12 and the orthogonal portion 40 of the discharge frame 26 together with the crack predicting portion 60. As a whole, the discharge frame 26 including the above can maintain the effect of dust removal by hitting without lowering the rigidity.

  In the present embodiment, the case where the plate-like body 12 is used in the portion 40 orthogonal to the discharge line 28 of the discharge frame 26 in the vicinity of the striking rod 42 has been described. The present invention can also be applied to a certain discharge frame 26.

  It can be used as an H-shaped protector for the discharge electrode of a dry electrostatic precipitator that effectively reinforces the partially damaged discharge electrode with a simple configuration and reduces the economical and human maintenance burden on the discharge electrode.

It is the schematic which shows the whole this embodiment. It is the schematic of the plate-shaped body which comprises this embodiment. It is the schematic which shows the relationship between the groove | channel formed in the plate-shaped object, and the discharge frame. It is the schematic which shows the dust collection electrode of the dry electric dust collector of a prior art.

Explanation of symbols

10 ......... H-shaped protector for discharge electrode reinforcement, 12 ......... Plate-like body, 14 ......... Flat plate, 16 ......... Connecting portion, 18 ......... Groove, 20 ......... Notch, 22 ......... Column, 24 ......... Bolt hole, 26 ......... Discharge frame, 28 ......... Discharge wire, 30 ......... Through hole, 32 ......... Protrusion, 34 ......... Bolt, 36 ......... Nut, 38 ......... Gap, 40 ......... Orthogonal portion, 42 ......... Strike rod, 50 ......... Discharge electrode, 52 ......... Discharge frame, 54 ......... Discharge wire, 56 ......... Strike rod, 58... Orthogonal part, 60.

Claims (1)

A pair of H-shaped plates having two pillar parts and a connecting part for connecting the pillar parts to each other ;
The plate-like body is
Is formed in the longitudinal direction of the front Symbol connecting part has a V-shaped cross-section, the side surface abuts capable sandwiching the discharge inventory groove of the discharge frame,
A notch that cuts out both ends of the connecting portion in the width direction together with the groove;
A bolt hole formed in the upper part and the lower part of the pillar part ,
The plate-like bodies are opposed to each other, the discharge frame is sandwiched between the grooves facing each other, and discharge lines that intersect perpendicularly to the discharge frame are formed with the notches between the coupling portions facing each other as openings. Let the discharge wire penetrate through the penetrating hole,
Bolted sandwich and said discharge line and the discharge collecting frame, the discharge electrode reinforcing H-type protector dry electrostatic precipitator, which comprises reinforced by fixing the discharge frame by the plate-like body.

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