JP2009233520A - L-shaped protector for discharge electrode of dry electrostatic precipitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an L-shaped protector for a discharge electrode reinforcing the discharge electrode of a dry electrostatic precipitator. <P>SOLUTION: The protector is made of plate bodies 12 including of a pair of L-shaped flat plates 14, grooves 18 which are formed in the same plane of the central part of the two arms 16 of the flat plates and mutually in perpendicular directions, have a V-shaped cross section and are capable of coming in contact with side surfaces of the discharge frame 24 and hold the discharge frame, and bolt holes 20 formed in the arms 16 at the ends of the arms and roots of the arms 16. The plate bodies 12 are made to be opposite to each other; the two cylindrical frames 24 perpendicular to each other of the discharge electrode 22 are held; and the plate bodies 12 are fastened with bolts so as to reinforce a crossed part 34 of the discharge frame 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an L-shaped protector for a discharge electrode that reinforces 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 schematic diagram of a discharge electrode 40 of a dry electrostatic precipitator according to the prior art. The discharge electrode 40 is formed in a discharge frame 42 formed in a lattice shape by using a plurality of discharge frame vertical pipes 42a and discharge frame horizontal pipes 42b. The discharge line 44 is vertically penetrated through the through hole (not shown), and a wedge (not shown) is driven into the gap between the discharge line 44 and the through hole (not shown) to fix the discharge line 44. It is formed by doing. A striking rod 46 for striking the discharge frame 42 is formed on the outer frame of the discharge frame and perpendicular to the discharge frame vertical pipe 42a and the discharge frame horizontal pipe 42b. The striking rod 46 is hit with a hammer. The dust adhering to the discharge electrode 40 is removed by the impact (see Patent Document 1).
JP 2006-7150 A

  However, the orthogonal portion 48 of the discharge frame vertical pipe 42a and the discharge frame horizontal pipe 42b above and below the striking rod 46 is a portion that is strongly subjected to stress due to impact from the hammer. It may cause damage such as cutting. When such damage occurs, the strength of the discharge frame 42 decreases, and it becomes difficult to hold the discharge electrode 40 at a stable position in the apparatus. A problem such as a short circuit occurs. However, it is costly to replace the entire discharge electrode 40 when only a part of the discharge electrode 40 is damaged. Although it is possible to reinforce the discharge electrode 40 by repairing the damaged portion by welding, the work load becomes a problem because the distance between the discharge electrode 40 and the dust collecting plate (not shown) is narrow.

  Accordingly, the present invention provides an L-shaped protector for the discharge electrode of a dry electrostatic precipitator that effectively reinforces a partially damaged discharge electrode with a simple configuration without imposing a large work load with a focus on the above problems. .

  In order to achieve the above object, a discharge type reinforcing L-type protector for a dry electrostatic precipitator according to the present invention is perpendicular to a pair of L-shaped flat plates and the same plane at the center of two arms of the flat plate. Formed in a direction, having a V-shaped cross section, a groove that can be in contact with a side surface of the discharge frame and sandwich the discharge frame, an end portion of the arm, and a bolt hole formed at the base of the arm; The plate-shaped body is formed so that the plate-shaped body is opposed to each other, two orthogonal cylindrical discharge frames of the discharge electrode are sandwiched, and the plate-shaped body is fixed by bolting to fix the discharge frame. It is characterized by reinforcing the orthogonal part.

  According to the discharge electrode reinforcing L-shaped protector of the dry electrostatic precipitator according to the present invention, the side surface of the discharge frame constituting the discharge electrode comes into contact with 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 surface of the discharge frame abuts on the four side surfaces consisting of one V-shaped side surface and the other V-shaped side surface. It can be held by. In addition, when the diameter of the discharge frame having a circular cross section is changed, the contact position with the discharge frame on the side surface of the groove is changed, but the contact with the discharge frame is maintained. It can also be held against the frame. Furthermore, since the two orthogonal grooves are formed in the plate-like body, two orthogonal discharge frames can be held simultaneously. Therefore, the rigidity of the orthogonal part of the discharge electrode of the dry electrostatic precipitator can be maintained and effectively reinforced. In addition, even when the discharge frame is less rigid due to breakage or breakage of the discharge frame, the impact of the strike is not transmitted to the discharge frame, and the ability to remove dust is reduced, the discharge frame is sandwiched between plates. As a result, the entire discharge frame including the plate-like body is not lowered in rigidity, and the effect of dust removal by striking can be maintained.

  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. .

  FIG. 1 and FIG. 2 show an L-shaped protector for discharge electrode reinforcement of a dry electrostatic precipitator according to this embodiment. FIG. 1 is a schematic view showing the entirety of the present embodiment, and FIG. 2 is a schematic view of a plate-like body constituting the present embodiment. An L-type protector 10 for reinforcing a discharge electrode of a dry electrostatic precipitator according to the present embodiment is formed in a direction perpendicular to each other on the same surface of a pair of L-shaped flat plates 14 and two arms 16 of the flat plates. A groove 18 having a V-shaped cross section, which can be in contact with the side surface of the discharge frame 24 and sandwich the discharge frame, and bolts formed on the end side of the arm 16 and on the base side of the arm 16 A plate-like body 12 formed from a hole 20, the plate-like body 12 facing each other, and two orthogonal cylindrical discharge frames 24 (discharge frame vertical pipe 24 a and discharge frame horizontal pipe 24 b) of the discharge electrode 22. And the plate-like body 12 is fixed by bolting to reinforce the orthogonal portion 34 of the discharge frame 24, and even if a breakage / breakage occurs in the fracture prediction portion 50 of the orthogonal portion 34, the orthogonal portion 34 is reinforced.

  The L-shaped flat plate 14 constituting the plate-like body 12 is not particularly limited as long as it has a certain rigidity and is resistant to acid corrosion, and stainless steel or the like can be used. Further, the size of the flat plate 14 is such that the arm 16 of the plate-like body 12 can be brought into contact with two orthogonal discharge frames 24 simultaneously. 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.

  The two arms 16 of the plate-like body 12 are both rectangular plates having the same dimension in the longitudinal direction and the short side direction, and have a form that intersects vertically sharing the root 12b.

  A groove 18 is formed at the center of the arm 16. The grooves 18a and 18b constituting the groove 18 are formed in the short side direction of the arm 16 by two side surfaces of a V-shaped cross section, and the grooves 18a and 18b are arranged perpendicular to each other in the plate-like body 12. . Further, the grooves 18 a and 18 b are formed symmetrically about a bisector of an angle (right angle) formed by the two arms 16. Accordingly, the plate-like body 12 avoids the orthogonal portion 34 of the discharge frame 24, and the groove 18 a and the groove 18 b, that is, the groove 18 can come into contact with the two orthogonal discharge frames 24 simultaneously.

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２４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２４とが当接する。この条件でも一対の板状体１２で放電枠２４を挟み込むことが可能であるが、放電枠２４と板状体１２との当接部分は放電枠２４の断面方向からみて点（放電枠２４の長手方向からみて線）状であり、放電枠２４を挟み込んでボルト止めすると放電枠２４を傷める虞があるため、この条件で放電枠２４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２４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２４に空間的な遊びが生じ、放電枠２４を補強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２４の側面と同時に当接する。よって一対の板状体１２について様々な径の放電枠２４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 grooves formed in the plate-like body and the discharge frame. As shown in FIG. 3, the cross section of the discharge frame 24 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 a 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 come into contact with the side surfaces of the discharge frame 24 simultaneously,

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 24 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 24. Abut. Even under this condition, it is possible to sandwich the discharge frame 24 between the pair of plate-like bodies 12, but the contact portion between the discharge frame 24 and the plate-like body 12 is a point (of the discharge frame 24 as viewed from the cross-sectional direction of the discharge frame 24. If the discharge frame 24 is pinched and bolted, the discharge frame 24 may be damaged. Therefore, it is not preferable to sandwich the discharge frame 24 under these conditions. on the other hand. When t ₀ is longer than the range of Equation 1, even if the discharge frame 24 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 24. Play occurs and the discharge frame 24 cannot be reinforced. On the other hand, when t ₀ and θ are constant, that is, when the cross-sectional dimension of the groove 18 formed as a plate 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 24 simultaneously. Therefore, the discharge frames 24 having various diameters can be appropriately sandwiched between the pair of plate-like bodies 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２４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 24 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 26 having a shape following the side surface of the groove 18 is formed. That is, the groove 18 and the convex portion 26 are formed at the same time by folding the arm 16 along the short side direction. The side surface of the convex portion 26 has a shape following the side surface shape 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 14 can be made thinner and lighter. Furthermore, since the side surface of the convex portion 26 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.

  Bolt holes 20 are formed on the end 16 a side of the arm 16 of the flat plate 14 and on the base 16 b side of the arm 16. The bolt hole 20 is formed in a bilaterally symmetrical position with a bisector of an angle (right angle) formed by the two arms 16 as a center line, like the grooves 18a and 18b. 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 34 of the discharge frame 24. 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３２の間隔は一定ではなく、アーム１６の端部１６ａに向かうほどその間隔は小さくなる。なお、ボルト２８、ナット３０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 28 has a diameter that can be inserted into the bolt hole 20. The gap 32 formed between the pair of flat plates 12 when the plate-like body 12 sandwiches the discharge frame 24, the thickness of the flat plate 12, and the bolt 28. It has the length of the dimension which added the thickness of the nut 30 to screw. Here, when the discharge frame 24 is sandwiched between the plate-like bodies 12 and the discharge frame 24 is in contact with all four side surfaces of the groove 18, the interval t _{2 of the} gap 32 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 when bolted, the interval of the gap 32 is not constant, and the interval decreases toward the end 16 a of the arm 16. The bolt 28 and the nut 30 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 L-shaped protector of the dry electrostatic precipitator according to the present embodiment will be described. First, the discharge frame vertical pipe 24a and the discharge frame horizontal pipe 24b are sandwiched between the plate-like body 12 composed of a pair of flat plates 14 at a position in the vicinity of the orthogonal portion 34 of the discharge frame 24 in the vicinity of the striking rod as in the above-described prior art. At this time, the groove 18a and the groove 18b sandwich either the discharge frame vertical pipe 24a or the discharge frame horizontal pipe 24b, respectively. Then, the bolt holes 20 formed in each of the pair of flat plates 12 face each other to form a through hole penetrating the plate-like body. Bolts are clamped by passing bolts 28 through these through holes and tightening them with nuts 30.

  At this time, the contact portion of the side surface of the discharge frame 24 with the plate-like body 12 extends in the longitudinal direction of the discharge frame 24, and the length thereof is the same as the length of the groove 18. Further, the side surface of the discharge frame 24 simultaneously abuts on the four side surfaces of the groove 18 of the plate-like body 12 sandwiched from two directions. Thereby, the discharge frame 24 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 24 held by the plate-like body 12. In this state, even if the rigidity of the discharge frame 24 itself is lost due to cracks or the like in the portion that contacts the plate-like body 12 in the longitudinal direction of the discharge frame 24, the portion is fixed to the plate-like body 12. As a result, the rigidity of the portion of the discharge frame 24 where the plate-like body 12 is sandwiched is reinforced.

  Further, since the flat plate 14 constituting the plate-like body 12 also has rigidity, the form in which the discharge frame vertical pipe 24 a and the discharge frame horizontal pipe 24 b are orthogonal to each other is to obtain a certain rigidity as a whole via the plate-like body 12. Become. In this state, even if the fracture prediction part 50 as shown in FIG. 1 occurs due to cracks or the like in the orthogonal portion 34 between the discharge frame vertical pipe 24a and the discharge frame horizontal pipe 24b, the discharge frame Since the configuration in which the vertical pipe 24a and the discharge frame horizontal pipe 24b are orthogonal to each other has obtained rigidity through the plate-like body 12, the rigidity of the orthogonal portion 34 is reinforced as a result.

  Therefore, even when a hammer is applied to the striking point in the vicinity of the above-described reinforcing portion, and the constant stress reaches the reinforcing portion, the plate-like body 12 itself that reinforces the discharge frame 24 is rigid, and the discharge frame 24 Since no stress is applied to the discharge electrode itself, there is no possibility that the discharge electrode 22 composed of the discharge frame 24 is deformed. Further, the fracture predicting portion 50 of the orthogonal portion 34 of the discharge frame 24 is damaged or broken, and the rigidity of the discharge frame 24 is reduced. The impact due to the strike is not transmitted to the discharge frame 24 and the ability to wipe off dust is reduced. Even in the case where the discharge frame 24 is sandwiched between the plate-like bodies 12, even if the discharge frame 24 including the plate-like body 12 is not lowered in rigidity, it is possible to maintain the dust removal effect by the strike. it can.

  In this embodiment, the case where the plate-like body 12 is used for the orthogonal portion 34 of the discharge frame 24 in the vicinity of the striking rod has been described. However, the present invention is not limited to this, and the orthogonal portion of the discharge frame at a position away from the striking rod. It can also be applied to.

  It can be used as an L-shaped protector for a discharge electrode of a dry electrostatic precipitator that effectively reinforces a 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 system form. 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 ......... L-shaped protector for discharge electrode reinforcement, 12 ......... Plate-like body, 14 ......... Plate, 16 ......... Arm, 18 ......... Groove, 20 ......... Bolt hole, 22 ......... Release Electrode, 24 ......... Discharge frame, 26 ......... Protrusions, 28 ......... Bolt, 30 ......... Nut, 32 ......... Gap, 34 ......... Orthogonal portion, 40 ......... Discharge electrode, 42 ... ...... Discharge frame, 44... Discharge line, 46... Strike rod, 48.

Claims (1)

A pair of L-shaped flat plates;
A groove formed in a direction perpendicular to each other on the same plane of the two arm central portions of the flat plate, having a V-shaped cross section, abutting a side surface of the discharge frame, and sandwiching the discharge frame;
An end of the arm and a bolt hole formed at the base of the arm;
Having a plate-like body formed from
The discharge of a dry type electrostatic precipitator that faces the plate-like body, sandwiches two orthogonal cylindrical discharge frames of discharge electrodes, and fixes the plate-like body by bolting to reinforce the orthogonal portions of the discharge frame. L-shaped protector for electrode reinforcement.

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