US2959246A

US2959246A - Discharge electrode tensioning means

Info

Publication number: US2959246A
Application number: US819967A
Authority: US
Inventors: Phyl Joseph; Max M Strupp
Original assignee: Research Cottrell Inc
Current assignee: Research Cottrell Inc
Priority date: 1959-06-12
Filing date: 1959-06-12
Publication date: 1960-11-08
Anticipated expiration: 1977-11-08

Description

Nov. 8, 1960 J. PHYL ETAL 2,959,246

DISCHARGE ELECTRODE mnsroums MEANS Filed June 12, 1959 2 Sheets-Sheet 1 Y I I l8 he 60 Q U M] INVENTORS JOSEPH PH Y L MAX M. STRUPP ATTORNEYS Nov. 8, 1960 J. PHYL ETAL 2,959,246

DISCHARGE ELECTRODE TENSIONING MEANS Filed June 12, 1959 2 Sheets-Sheet 2 W54 |ll "ii? 6O 62' 42 INVENTORS JOSEPH PHYL MAX M. STRUPP ATTORNEYS United. States Patent .DISCHARG'E ELECTRODE TENSIONING. MEANS JosephPhyl; Eanwood, and Max M; Strupp, Bridgewater Township, N.J., assignors to Research-Cottrell, Inc., .igiridgewater Township, N.J., a corporation oLNew Filed June 12, 1959, Ser. No. 819,967

Claims. (Gl.-183-- 7) The present invention relates to electrical -;precipitation apparatus and more particularly andspecifically tov new and useful improvementsin dualzdischarge electrode ten- .sioning means for such apparatus.

In conventional precipitator construction,-it has been the practice to suspend discharge electrodes from a high tensionfrarne by a. resilient. or rigid coupling of one type or another and-to weight thebottom free hanging ends of the electrodes to assist in maintaining :the elec- :trodes inverticalalignment within the precipitator.

However, with. theemployment of dual discharge electrodeassemblies rather than the conventional single dischargeelectrodes, certain difliculties have been presented. A-major difiiculty has been the-attainment, of-equal tension on the individual electrode wires of a single assembly.

In order to obtain the maximum efficiency-of an electricalprecipitator, equal tension is necessary in each wire.

The present invention has for one of its principal objects the production ofa simple and effectivemeans for obtaining equal tension in the individual discharge electrode wires of an assembly comprised of :more than one wire.

-Cer. tain, ot-her advantages and objects of the invent ion -will become readily apparent to one skilledjin the art when; the following description is read in lightfifthe accompanying drawings.

The nature ofet-hepresent invention may be stated in general terms as relating to a discharge electrodeassembly for electricalprecipitaters-'whichincludes in--cornbination a high tension frame and a plurality of parallel discharge electrode units depending from the frame, each of the electrode units comprising at least two electrode wires, the combination with said assembly of a weight for each of said electrode units connected to the electrode wires thereof, each of said weights consisting of at least a pair of cooperating sections for maintaining equal tension on the electrode wires of each unit.

Referring now to the accompanying drawings in which like numerals designate similar parts throughout the several veiws:

Figure 1 is a side elevational sectional view incorporating the tensioning means constituting the present invention.

Figure 2 is a fragmentary sectional view of one of the discharge electrode tensioning means of the present invention taken along line 22 of Figure 1.

Figure 3 is an enlarged front elevational view of the tensioning means shown in Figure 2.

Figure 4 is a sectional view of the tensioning means constituting the invention taken along line 4-4 of Figure 2.

Figure 5 is an enlarged fragmentary view of the means for retaining the individual discharge electrode wires in the tensioning weights of the invention.

Referring to Figure 1 of the drawings, there is disclosed a typical electrical gas precipitator which includes a housing 12 having a hopper type discharge hot- .tom 14=,togetherwith a cleanugas outlet, 16 on one side thereof and a dirty gas inlet 18 on the opposite side thereof.

.by a conventional insulator support 26 carried within a housing 28. on the topor upper end of the precipitator housing 12.

Associated with each of the rigid-frames 22 is a plu- :ralit-y'. of discharge electrode assemblies 30 each comprised of a pair of

electrode wires

32 and 34 clearly illustrated inFigure 2. Each of the electrode Wire assem- 'blies is secured to the frame 22 by a coupling or shoulder bolt 36 provided with a spool 37. The discharge electrode assemblies 30 are each maintained in tension by a weight assembly 38. Each of the weight assemblies 38 is comprised of two individual elements 40 and 42 which .are individually connected to the

discharge electrodes

32 and 34, respectively.

Referring in particular to Figures 2 and 3 of the drawings; itis seen that the upper ends of the discharge electrode wires 32' and 34 are looped aroundthe spool 37 of the bolt 36 and are firmly maintained thereon and .locked together-by a ferrule 44. To further insure that .the;discharge,

electrode wires

32 and 34 do not experience anyrelative movement, the ends of the wires maybe turned back upon themselves, as shown in Figure 3,

to form a "hook portion-46 fitting around the outer-surface of-.the ferrule- 44.

sTorobta-in ,equaltension in each of the discharge :electrode wires 32,. and 34, an individual section40 or .42rof;the weight assembly 381s attached thereto. The

inrlividuahelements and-42-are identical with respect ito one;another and. therefore for the sake of simplicity aonlyea single one-.-will-be described in detail.

The element 40 of the weight 38 consists principally of an elongate body portion which tapers to a reduced neck and terminates in a hook-like upper end adapted to receive the lower end of its respective electrode wire 32. The lower end of electrode wire is formed into a loop by being folded upwardly and is held in place by a ferrule 48. The ferrule 48 is adapted to enclose or surround two thicknesses of the wire 32 and also one thickness of the adjacent wire 34. In order to permit freedom of relative longitudinal movement of the

wires

32 and 34, the ferrule 48 is not clamped tightly on the encompassed wire thicknesses. Instead, it will be noted, the free end of the wire 32 is folded back upon itself to form a. hook portion 50 which fits around the top of the ferrule 48.

The adjacent electrode wire 34 is formed similarly to the wire 32. The lower portion thereof is formed into a loop by being folded upwardly and is held in place by a ferrule 52 which is adapted to surround two thicknesses of the wire 34 and also one thickness of the adjacent wire 32. In order to permit freedom of relative longitudinal movement of the

wires

32 and 34, the ferrule 52, like the ferrule 48, is not clamped tightly on the encompassed wire thicknesses. Instead, the free end of the wire 34 is folded back upon itself to form a hook portion 54 which fits around the top of the ferrule 52.

Equal tension of the

individual electrode wires

32 and 34 is accomplished by the individual weight elements 40 and 42 which are free to move longitudinally with respect to one another. However, these weight elements must be held in close proximity to provide for a mini mum spacing between their associated electrode wires and care must still be taken to avoid the freezing or sticking at zones where two flat areas of the weight elements lie against each other. Therefore, the elements 40 and 42 are provided with

vertical rib projections

56 and 58, respectively, which maintain a minimum of surface contact between the weight elements.

It is also important to note that the hook-like upper end portions of the weight elements 40 and 42 in each instance are offset in a direction toward the cooperating weight sections from a vertical line passing through the center of gravity of the weight, thus causing the weight elements to rock together about their suspension points at the bottom of the loops of the

electrode wires

32 and 34. Manifestly, the above described method of suspending the weight elements eliminates the need for any auxiliary means to hold the weight elements together.

In order to avoid any swinging of the discharge electrode wire assemblies 30 and their associated tensioning weights, a conventional steadying frame 60 is employed. The steadying frame 60 is adapted to rest on a plurality of radially extending shoulders 62 of the individual weight elements 40 and 42.

It will be readily understood by those skilled in the art that although the discharge electrode wires illustrated and described herein are round, satisfactory results could likewise be achieved with the use of electrode wires having other cross-sectional configurations such as for example square, rectangular, and twisted.

Further, it will be apparent that certain other modifications of the invention described could be made without departing from the spirit of the invention. Among the more obvious modifications is with respect to the upper ends of the weight sections 40 and 42. While hook-like configuration is advantageous and provides for easy installation and also dismantlement, the upper ends of these weights could be formed with a bore of sufiicient diameter to receive their respective electrode wires.

According to the provisions of the patent statutes, we have explained the principles and mode of operation of our invention, and as illustrated and described what we now consider to represent its best embodiment. However, We desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I. In a discharge electrode assembly for an electrical precipitator comprising a high tension frame and a plurality of parallel discharge electrode units depending from the frame, each of the electrode units comprising at least two electrode wires, the combination with said assembly of a weight for each of said electrode units connected to the electrode wires thereof, each of said weights consisting of at least a pair of cooperating elements for maintaining equal tension on the electrode wires of each unit and means for maintaining the lower portion of said electrode wires in close proximity and slidable relative to one another.

2. The combination claimed in claim 1 wherein said electrode wires are connected to said weight elements at a point offset in a direction toward the other of said elements from a line passing through the center of gravity of said element.

3. The combination claimed in claim 2 wherein each of said weight elements is provided with a spacing member disposed to abut against the other weight element to thereby present a minimum surface contact between the said cooperating elements.

4. A tensioning weight element for dual discharge elec trode wires in electrical precipitator apparatus comprising a weight assembly including a pair of weight elements, each of said elements provided with suspension means for attaching to its associated discharge electrode, said means being offset in a direction toward the other of said elements from a line passing through the center of gravity of said element, and means for maintaining at least the upper portions of said elements in close proximity of one another.

5. The combination claimed in claim 4 wherein said a means are offset in such a manner that the discharge electrodes contact each other in their entire length to thereby secure maximum corona discharge.