US2351117A - Fluid heater cleaner - Google Patents

Description

June 13, 1944. R GLlNN ETAL 2,351,117

FLUID HEATER CLEANER" Filed July 19, 1940 2 sheets-sheet 1 June 1.3,l 1944.

R. J. yGLINN ET AL FLUID HEATER CLEANER Filed July 19, 1940 2 Sheets-Sheet 2 struction vas to facilitate maintenance.

Patented June 13, 1944 FIU'ID IHEATER CLEANER Roy .James Glinn and Percy Gilbert Handoll,

'London,`iEngland, -assignors to Diamond Power Specialty Corporation, Detroit, Mich., a corpo- `ration of Michigan Application'uly v19, 1940,-Serial No. `346,410 In Great Britain July v26, 1939 2 Claims.

f1-nis linvention relates ranura nearer cleaners vof .the =kind comprising :a movable blower element adapted tobe projectedfor Voperation from 'a Vretracted 'position andxafter loperation vto be `withdrawnito thatposition, one object being the :provision 'of a fluid heater cleaner of lsuch con- A further object wis the .provision lof a'fluid heater cleaner :with Aa 'form of pressure part which makes for ease in manufacture and is suitable -f or use with high pressure cleaning fluid. A ufurther object uof .thelinvention is the provision fof :automatic kcontrol means for the pressure -fluidfsoarranged that adjustments of the angle Ifor angles over which blowing is eiected may readily be made.v

.According to the present invention a fluid heater cleaner of .the '.kind specified includes a 'pressure Ipart `formed `.with an aperture of sui- .ficientdiameter to permit withdrawal of themoviableblowerelement which extends therethrough and with Ia `valve-chamber containing a valve 'for c'on'trolling :the supply 4of pressure fluid tothe 'aperture rand-thence to the blower element and provided with -a closure member arranged to permit direct-access to the valve-seating. Preferably the said part is aforging.

` In fone embodiment of the invention the pressure part is in the form of a forging of rectangular shapeY and the valve is Aarranged for operaition' by a piston under the control of a pilot or `relay valve arranged automatically to be operated 'in dependence upon the position of the blower element.

The invention will now be described by way` of example with reference to the Aaccompanying drawings, in which:

Figure 1` shows a 'longitudinal sectional elevvation of a uid heater cleaner of the kind specified embodying the improvements according to the'invention;

Figure 2 is a plan view of Figure 1;

Figure 3 is a sectional view to a larger scale on the line III-III of Figure 1; y

Figuresfl and '5-are views on a larger scale thanFigure l showingalternative forms of cam for giving different blowing angles;

I Figure 6 is a sectional view on the line VI--VI of Figure 4, and

Figure '7 is a view of the washer 85 looking rom'the left of Figure 1.

Referring to Figures 1 and 2 of the drawings, I denotes the blower tube which is formed lin one with a solid spindle 2` and is fitted with a blower nozzle 3, theseV parts together forming closing the cylinderY 6 ,and secured 'studs and=nuts I I.

shown, the valve lid clamping the latter against the bolt head 2I.

`between thesleeve I3 mediate the spindle and ment shown the spindler sure `part 4 through the aperture 5 in which the element extends.

The pressure part -4 vis a rectangular forging and is formed with a cylindert for apiston l the -longitudinal'axis of which is transverse to thatof the Fblower element and a relay valve il is disposed in a Ycover `plate 9 to the pressure part 4. Thus an underlying Yvalve chamber Il) and the cylinder 6 extend in a vertical-direction upwardly-from the aperture 5 in the pressure part 4 whichis Isurmounted by the cover-.plate 9 in position by .The actual surfaces of contact .between cover plate 9 and pressure part 4 are provided by the end of an annular projection I2 landthe bottom of an annular recess I3 formed'in the upper surface of the-pressure part ll around the cylinder 6.

A xed valve seat vHI `is disposed at the bottom -of Vthe valve chamber I!) and'is screwed into the opening I5 between'thevalve chamber and aperture `5 Aand is Jdirectlyaccessible and may be inspected and-attended ltovor replaced by removing the cover plate 9 and the piston 'l with associated partsfincluding movable 4valve lid I6 and a biassing spring VII disposed within the piston I around a central sleeve I8 and bolt I9. As I6 is held vto bolt I'S by a intothe valve lid and vA nut `22 screwed onto the bolt I9 serves to clamp the end offpiston 'I through which the bolt passes, and shoulder-23 on the bolt and acts as a'stop to limit opening of the `valve by engaging the inside ofthe cover plate vSlwhich is suitably recessedat V24 to receive and position one 'end 'of the 'spring `I'I, the other end of which bearszagainst the end of 'thepiston lThe relay valve l8 .includes a lspindle axis'of which is disposed 'in the axis of the blower element and a cam 26 on the blower element is arranged to transmit moveflanged collar 20 Vscrewed 2s "the ment tothe spindle 25 through a tappet 21 transverse to the blower element and a lever 28 intertappet. In the arrange- V25 is parallel to the axis of the blower element, the relay valve 8 being arranged as a removable unit secured in a recess 29 "in the cover` plate 9, which recess is in communication with the cylinder B through a port 30'.

The spindle 25 of the relay valve vslides through 'a plane parallel to a sleeve 34, the inner end of which is clamped against a shoulder in the recess 29 by a threaded ferrule 36 screwed into the recess and bearing against the annular shoulder 31 on the sleeve. The inner portion of the sleeve 34 is formed with ports 38 and the adjacent portion of the spindle 25 is of reduced diameter so that when the movable valve face 39 formed near the inner end of the spindle is moved from the valve seat on the sleeve, iluid is able to pass into the annular space 4|, and through the ports 38 into the annular space 42 and thence to a duct 43 in the cover plate. The spindle 25 is biassed to the closed position by a spring which acts between seatings in the ferrule 36 and a head 45 screwed onto the spindle and the lever 38 operates the relay valve by pressing against the head 45. The

lever 38 is pivoted to, and the tappet 21 is ar-V ranged to slide in a bracket 3| secured to the pressure part 4 by studs I 99 and the length of the tappet 21 is adjustable, whilst a pin and slot arrangement 32 prevents rotation of the tappet 21 and thus maintains proper orientation of a roller 33 at the lower end of the tappet 21 in relation to the cam 26. I

The relay valve 8 is yarranged to exhaust pressure fluid acting lon the upper side of piston 1 to the inner side of awall 46 of the fluid heater. Thus a tube 41 is arranged to conduct the fluid from the duct 43 in cover plate 9 to a duct 48 leading to the interior of a wall box 49 clamped by screws 98 to the front side of the pressure part 4, the tube being readily disconnectablevfrom the cover plate 9 by means ofthe joint 50.

According to the connection required, the one side Ior the other side of the forged pressure part is' bored and provided with studs and nuts 5| for the connection of a pressure fluid pipe 52 for supplying pressure fluid, generally steam, to the valve chamber I0 and a flanged aperturev 53 is provided on the wall box 49 adjacent to the pressure part for the admission of cooling iluid,`such as air, to the interior lof the wall box. Suitably the pressure fluid pipe`52 is provided with a stop valve (not shown) whereby the pressure part 4 may be isolated to permit of attention to the valves or piston.

The cam 26 which` is external to the pressure part 4 is readily removable. Thus as shown more particularly in Figure 3 the cam is divided into two parts 54 and 55 which together embrace the 5' part 56 of the spindle 2 of reduced diameter and are removably secured thereto. Conveniently the cam is secured to the spindle 2 by a screw 51 which passes through the bore 58 in cam part 54 and the diametrical bore 59 in the part 56 of the spindle 2 and screws into the cam part 55 thereby clamping the 'cam parts 54 and 55 against the spindle 2. `It follows that by removing the screw 51 the parts of the cam may be removed from the blower element.V It will be seenvthat the part of `the screw 51 adjacent its head. is of enlarged diameter and that one end of bore-59 and the bore 58 in cam part 54 are'of corresponding size. The ensures that the position of the cam parts 54 and shall not accidentally be interchanged, an

error which it is important to guard against when the two parts are not symmetrical. The cam shown is arranged to give a blowing angle of nearly 360 degrees, but-the two parts 54 and 55 areformed with inclines -60 and 6| respectively,

referred to hereinafter. YThe arrangement is such v, that the roller 33 when the head of screw 51 is adjacent thereto engages the cam surface to one side of the slot IUI of cam part 54 which accom- Vmodates the screwA head.

Cil

4the blower element.

The blower element slides through joints requiring no lubrication. Thus the element slides with a somewhat loose t through a sleeve 62 at the front and an adjustable packing 63 at the rear of the pressure part 4. The -adjustable graphited packing 63 isprovided in the pressure Dart 4 itself between-neck ring 64 and gland 65 whilst the sleeve 62 is provided at the forward end of a cylindrical extension 66 screwed and welded to the forging and projecting within the wall box 49.

The nozzle 3 which discharges at an angle to the longitudinal axis of the blower element and the angular position of which relatively to the blower tube I may readily be adjusted is screwed into the blower tube and locked in position by a lock nut 61 whilst the solid spindle 2 is formed towards its extremity with a screw thread 68 hereinafter referred to, adjacent the part 56 of the spindle to which the cam 26 is secured. The

blower tube I at its rear end is formed with ports 69 which always lie in the pressure uid chamber 19, which is formed by the parts of the aperture 5 and extension 66 between the sleeve 62 and neck ring 64 and which is arranged to receive pressure fluid from the valve chamber I 0 through the opening I5. Thus when the valve lid I6 is lifted, pressure fluid flows from the valve 'chamber' I 0 into the chamber 10 and thence through the ports 69 and blower tube I to the nozzle 3.

The blower element may be turned by a con-- centric gear wheel 1| through a key 12 and keyway 13 and rotation of the blower element causes longitudinal movement thereof through co-operation between the screw thread 68 and a xed nut wheel 1| is positionedlongitudinally by the surfaces 82 and 83 vrespectively of p arts of the housing and the end of bracket 15 and is provided with bearing surfaces 84 and 85 on the bracket 15 and housing 19 respectively.

Suitable-stops are arranged directly to oppose further rotation of the blower element in its end position. Thus clamped to the ,rear end of the blower element is a washer 85 formed on its periphery with shoulders 31 and 88 which abut against stops 89 and 99 formed on the interior of a housing 9| which is clamped to the gear casing 19 and which serves to enclose the end of Instead of providing `both stops 89 and 99 within the housingv 9|, one only 89, in ay be formed therein at the rear end thereof, the other, 94, being located within'the outer end of the gear case 19.

Figures 4 and 6 show a camion giving a blowing angle smaller than that given by the cam of Figure i.. In this case the cam consists of a single part arranged to 'be clamped to the blower element 'by a screw passing through the part 56 of the element and screwing into the threaded hole 53 of the cam. A projection S3 on the cam by engaging the recess 94 in the part 56 of the blower element assists in positioning the cam. Inclines 95 and 96 on the cam are provided at the end-.sl of the cam surface corresponding to the blowing period. .l

The cam shown in Figure 5 is similar to that shown in Figures 4 and 6, corresponding parts being similarly numbered, but is arranged for a smaller blowing angle.

In the operation of the cleaner described, when the shaft 18 is rotated in the forward direction, the blower element is rotated by the gear wheel 1I and co-operation between the screw thread 68 and nut 14 causes the blower element to be projected. During the greater part of the forward movement, the cleaning pressure fluid is excluded from the pressure fluid chamber 5, but when the blower element has been projected to an operative position the cam 26 becomes effective over the blowing angle to effect movement of the valve lid I6 to the open position so that cleaning fluid is projected from the nozzle 3. The arrangement is such that the recess or gap between the inclines 60 and 6I of Figure 3 or 95 and 96 of Figures 4 or 5 first comes below the tappet roller 33, after which rotation of the cam operates the tappet 21 to open the relay valve 3.

When the relay valve 8 opens, pressure fluid, which has leaked from the valve chamber I Ibetween the piston 1 and cylinder 6 or/ and through a small port, not shown, into the space between the piston and cover plate 9, is vented through the tube 41, with the result that the pressure in valve chamberk I0 rapidly forces the piston 1 and valve lid I6 to the open position.

When, under the control of cam 26 the relay valve B recloses, the leakage of pressure fluid causes the pressure in the space between the piston and cover plate to rise until the spring I1, assisted by gravity, becomes effective in returning the piston and valve lid to the closed position.

Rotation of the shaft 18 in the reverse direction causes movement of the blower element to the retracted position.

In the cleaner described above the blower element may be removed and the valves or piston may be attended to without removing the pressure part or disconnecting the pressure fluid connection thereto. Thus after removing the gland nuts 91 and unclamping the brackets 3| andA 15 the blower element may be withdrawn together with the bracket 15 and housings 19 and 9|; after disconnecting the tube 41 and removing the cover plate clamping nuts I I, the cover plate 9 may be lifted to give access to piston 1, valve lid I6 and valve seat I4; whilst after removal of the bracket 3l, the relay valve may be removed from recess 29 upon unscrewing ferrule 36.

Moreover, the cam 26 may readily be replaced without dismantling the cleaner, since the screw 51 is accessible between the limbs 16 of bracket 15 and the tappet 21 is also accessible. As a result the angle through which blowing takes place vmay be quickly and easily changed. If desired the direction in which Iblowing occurs may be changed by varying the angular position of the nozzle 3 relatively to the tube I.

In addition the pressure part is of neat and simple construction and suitable for use at high pressures and the screw thread on the blower element is remote from the pressure part and therefore remains relatively cool when steam is used as the cleaning medium.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we

declare that what we claim ist' l. In a fluid heater cleaner comprising a movable blower tube adapted to 'be projected from a retracted position and after operation to be withdrawn to that position, the combination of a casing for the lblower element having a fluid inlet through the wall thereof, a valve guarding said inlet and having its housing forming a part of said casing, and a relay valve positioned in said housing for the control of said valve and having a tappet extending through said casing for actuation by said blower tube, said valve being located sufficiently close to the opening occupied by the blower element and to that end of the opening from which the blower element is withdrawn that leakage of iluid past the valve may be observed in said opening and a tool may be inserted through the opening to manipulate said valve on its seat in an effort to dislodge foreign matter.

2. In a fluid heater cleaner comprising a movable blower tube adapted to be projected from a retracted position and after operation to be withdrawn to that position, the combination of a casing for the blower element having a fluid inlet through the wall thereof opening into a fluid chamber, a valve guarding said inlet and having its housing forming a part of said casing, said valve being spring pressed toward its seat in the base of said chamber and having its aXis normal to the blower element guarding the outlet from said chamber, a relay valve positioned in said casing for the control of said valve and having its axis normal to the axis of said valve, and a tappet for said relay valve projecting through said casing for actuation by said blower tube, said valve being located sufficiently close to the opening occupied by the blower element and to that end of the opening from which the blower element is withdrawn that -leakage of fluid past the valve may be observed in said opening and a tool may be inserted through the opening to manipulate said Valve on its seat in an effort to dislodge foreign matter, said relay valve and said tappet each being independently removable.

ROY JAMES GLINN. .PERCY GILBERT HANDOLL.

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