US3775827A - Corona-discharge electrode mounting device - Google Patents

Corona-discharge electrode mounting device Download PDF

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Publication number
US3775827A
US3775827A US00212299A US3775827DA US3775827A US 3775827 A US3775827 A US 3775827A US 00212299 A US00212299 A US 00212299A US 3775827D A US3775827D A US 3775827DA US 3775827 A US3775827 A US 3775827A
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US
United States
Prior art keywords
wedge
tool
electrode
corona
bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00212299A
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English (en)
Inventor
I Keserin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Application granted granted Critical
Publication of US3775827A publication Critical patent/US3775827A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/86—Electrode-carrying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53909—Means comprising hand manipulatable tool
    • Y10T29/5393—Means comprising impact receiving tool

Definitions

  • ABSTRACT A tool for securing corona-discharge electrode wires, preferably of a polygonal concave (i.e. clutch) profile, wherein a wedge is driven into an opening in an electrode-support frame into which the electrode wire is inserted.
  • the tool has a projection received within the concavity of the electrode wire and, in turn, is formed with a groove receiving the head of the wedge; the lower end of the tool is bent at an obtuse angle so that the impact portion of the tool is turned away from the electrode or any imaginary extension thereof.
  • a pneumatic or electromotive impactor may be provided at the end of the tool remote from the wedge-engaging end.
  • My present invention relates to systems for mounting corona-discharge electrodes in electrode support frames or holders and, more particularly, to a tool for driving an electro-de-retaining wedge, and to an electro-de-securing assembly comprising a wedge andits setting means.
  • a frame or other support structure receives a generally planar array of transversely spaced but mutually parallel coronadischarge electrode wires, the array being flanked by'a pair of collecting electrodes upon which the dust and other solid particles may accumulate. These accumulations are shed by the collector electrodes as a'result' of rapping, the solids accumulating in a dust-collection bin beneath the collector electrodes.
  • the apparatus may also include blowers or the like for inducting the flow of the particle-containing gas through the space between the collector electrodes and along the array of corona-discharge electrodes.
  • the solid particles entrained by the gas stream become charged and are attracted electro-statically to the collector electrodes.
  • Such systems are among the most efficient for removal of particles from a gas stream and have application in the cleaning of industrial or chemical-plant gases, the purification of air to be admitted to a dust-free space, the removal of particles from the exhaust gases of incinerators and the like, and wherever particle removal is desirable.
  • the apparatus may be used downstream of a particle-separating device such as a cyclone, performing a coarse removal of particles by sedimentation or kinetic principles, and may be followed by a mechanical filter if desired.
  • Corona-discharge electrodes of many types have been described in the art and the present invention is concerned with those corona-discharge electrodes which may be termed electrode wires.
  • Such electrode wires may have a variety of profiles, it being understood that discharge efficiency increases with the number of edges which are provided along the periphery of the electrode. Hence it is a common practice to use electrode wires having polygonal profiles and to in-- crease the sharpness of the edges by forming the sides of the polygon as concavities.
  • the sides of the profile of the star wire are approximately 4 6 mm in length and the wedge which isdriven into the gap between one of these sides and the frame, may
  • Still another object of the invention is to provide a system for anchoring corona-discharge electrode wires in which the effort of the worker can be reduced, the danger of damaging the wire is limited, the wires may be anchored more uniformly, and the anchoring operation can be carried out relatively speedily.
  • the lower end of the tool above the shoulder may be formed with an arcuate ridge of a configuration complementary to that of the electrode wire and receivable in the channel or flute provided by a recessed face thereof for alignment of the tool with the wedge.
  • the wedge is complementarily received within the recess of the electrode wire.
  • the advantage of a tool of this type resides in the fact that the wedge has its'head partly received in the channel form'ed'by a recessed face of the corona-discharge wire and cannot be engaged by a hammer or chisel.
  • the abutment surface of the tool of the present invention fits into the same channel and can provide full surface engagement of the head of the wedge until the tool abuts the tubular frame in which the electrode wires are to be anchored.
  • the wedges are therefore set with precisionand reproducibility.
  • the wedge is guided in the groove formed in the tool.
  • the arcuate nature of the tool whereby the shank turns away from an imaginary extension of the wire, allows a hammer or the like to strike the shank of the tool without the danger that slipping of the hammer will damage the electrode wire. Furthermore, the groove formed in the tool seats against the wedge which prevents slippage in the direction of impact.
  • the complementary configuration of the rib of the tool and the channel of the corona-discharge electrode and the complementary configuration of the wedge and groove of the tool, together with the substantially complementary inter-fitting of the wedge and the electrode channel ensures substantially all-around engagement of the wedge and confinement thereof against lateral displacement while it is driven into place.
  • FIG. 1 is a vertical elevational view of a system for anchoring an electrode in a tubular electrode frame according to the invention, the wedge being hatched for convenience of illustration;
  • FIG. 2 is a cross-sectional view taken along the line of II II of FIG. 1;
  • FIG. 3 is a cross-sectional view taken along the line 111 III of FIG. 1;
  • FIG. 4 is a view taken in the direction of arrow IV of FIG. 1;
  • FIG. 5 is a detail view of the system after the wedge has been driven into place, partly broken away.
  • FIG. 1 of the drawing I show a portion of a frame 1 across which a multiplicity of corona-discharge electrode wires are to be spanned in accordance with the practices common in the electrostatic precipitator art.
  • the upper tubular bar of frame 1 is provided with bores 2 into which the electrode is inserted.
  • the electrode 3 is shown to be a profiled bar of polygonal cross-section and, in the embodiment illustrated, has four sides 4 defining between them the sharp edges 4a which run the length of the electrode wire.
  • the sides 4 are concave outwardly to define channels, one of which has been illustrated at 4b with an axis of curvature located to the left of this channel, as seen in FIG. 2.
  • a wedge 6 is introduced between the wall of bore 2 and the channel 4b and has a circular profile as best seen in FIG. 2 so that its convex face 6a is substantially complementarily received in the channel 4b.
  • This channel may have a depth which is up to the radius of the wedge 6 and may be between 0.1 R and 1 R where R is the radius of the head of the wedge. The wedge and the channel thus lie in substantially tangential relationship.
  • the tool which is used to drive the wedge according to the present invention is represented at 5 and is bent from a rod which may be hardened at least at the upper and lower ends thereof.
  • the rod which has a circular cross-section shape 50, is bent into an obtuse angle a at the lower one third of the rod, this angle being between 170 and
  • This curved lower end is flattened along its flanks 5b and 5c and has an abutment face 5d adapted to come to rest against the upper surface 2a of the frame 1 when the wedge has been driven fully into the bore 2 (compare FIGS. 1 and 5).
  • the lower end of the tool is formed with a groove 7 terminating at the face 5d and substantially complementary to the head of wedge 6 (see FIGS. 1 and 2).
  • an abutment or shoulder 8 which rests against the wedge when the latter is driven into place.
  • the abutment or shoulder 8 forms part of a rib 5e which is complementarily received in the channel 4b (see FIGS. 1 and 3).
  • the tool is formed with an annular flange or shoulder 9 receivable in a pneumatic hammer which is represented at 10.
  • a pneumatic hammer which is represented at 10.
  • a tool for setting a wedge of circular cross section in a corona-electrode frame provided with respective bores each receiving a corona-discharge star-profile electrode wire having arcuately concave flutes comprising a bar having a shank and an end bent arcuately at an obtuse angle to said shank over about one third of the length of said bar, said end being formed with a groove for receiving said wedge and of a circular arcsegmental complementary to that of said wedge, said end having at its extremity a face adapted perpendicular to the axis of said bar at said end and to abut said frame upon driving of said wedge into the respective bore, a rib of circular -segmental profile formed on said bar and receivable in one of said flutes, and an abutment surface at the opposite extremity of said groove parallel to said face and engageable with said wedge for entraining said wedge upon impact displacement of said bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Separation (AREA)
US00212299A 1971-01-27 1971-12-27 Corona-discharge electrode mounting device Expired - Lifetime US3775827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2103696A DE2103696C3 (de) 1971-01-27 1971-01-27 Stabförmiges Schlagwerkzeug

Publications (1)

Publication Number Publication Date
US3775827A true US3775827A (en) 1973-12-04

Family

ID=5797002

Family Applications (1)

Application Number Title Priority Date Filing Date
US00212299A Expired - Lifetime US3775827A (en) 1971-01-27 1971-12-27 Corona-discharge electrode mounting device

Country Status (3)

Country Link
US (1) US3775827A (ja)
JP (1) JPS5540392B1 (ja)
DE (1) DE2103696C3 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999275A (en) * 1975-03-01 1976-12-28 Gebr. Hofmann Kg Tool for driving balance weights onto spoked wheels

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US983798A (en) * 1910-05-11 1911-02-07 Stephen H Angell Nail-set.
US1156314A (en) * 1910-01-10 1915-10-12 Alfonso R Rheinberger Connector for ground-terminals.
US1344619A (en) * 1919-03-18 1920-06-29 Frederick H Colvin Drift-bar
US2369021A (en) * 1944-04-21 1945-02-06 John H Cloney Magnetic glazier's tool
US2485992A (en) * 1945-02-27 1949-10-25 Buchanan Electrical Prod Corp Armature wedge driver and remover
US3177952A (en) * 1961-08-08 1965-04-13 Cambridge Thermionic Corp Impact tool

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1156314A (en) * 1910-01-10 1915-10-12 Alfonso R Rheinberger Connector for ground-terminals.
US983798A (en) * 1910-05-11 1911-02-07 Stephen H Angell Nail-set.
US1344619A (en) * 1919-03-18 1920-06-29 Frederick H Colvin Drift-bar
US2369021A (en) * 1944-04-21 1945-02-06 John H Cloney Magnetic glazier's tool
US2485992A (en) * 1945-02-27 1949-10-25 Buchanan Electrical Prod Corp Armature wedge driver and remover
US3177952A (en) * 1961-08-08 1965-04-13 Cambridge Thermionic Corp Impact tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999275A (en) * 1975-03-01 1976-12-28 Gebr. Hofmann Kg Tool for driving balance weights onto spoked wheels

Also Published As

Publication number Publication date
DE2103696C3 (de) 1975-11-06
DE2103696B2 (de) 1975-03-13
JPS5540392B1 (ja) 1980-10-17
DE2103696A1 (de) 1972-08-17

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