US1997651A

US1997651A - Washing device comprising shower pipes

Info

Publication number: US1997651A
Application number: US740770A
Authority: US
Inventors: Paramor John; Suckling Harry
Original assignee: Watford Engineering Works Ltd
Current assignee: Watford Engineering Works Ltd
Priority date: 1933-11-08
Filing date: 1934-08-21
Publication date: 1935-04-16
Anticipated expiration: 1952-04-16

Description

3 Sheets-Sheet l A ril 16, 1935. J. PARAMOR ET AL WASHING DEVICE COMPRISING SHOWER PIPES Filed Aug. 21, 1934 April 16, 1935; V J. PARAMOR ETAL v 1,997,651

WASHING DEVICE COMPRISING SHOWER PIPES Fild Aug. 21', 1954 s Sheets-Sheet 2 lll lllh April 16, 1935. J. PARAMOR ETAL 1,997,651

WASHING DEVICE COMPRISING SHOWER PIPES Filed Aug. 21, 1954 3 Sheets-Sheet 3 Patented Apr. 16, 1935 PATENT orr cr.

1,997,651 K wasnme DEVICE commsmo snows-B .PIPES John Paramor,

Wattord, and Harry Suckling, West Thur-rock, England, ford Engineering Works Limited,

assignors to The Wat- -Watiord,

England, a British company Application 6 Claims.

This invention relates to washing devices comprising shower or washing pipes such as are used livery pipe for washing strainers, felts and the like in paper mills and other industries, and the particular type of washing device to whichthe invention relates is that wherein a delivery pipe has a plurality of outlets for jets of liquid spaced apart in a row in the direction of its length, a cleaning device movable in the pipe serves for cleaning the outlets, and a longitudinal baiiie is so arranged parallel with said pipe that the jets will impinge thereonand be converted into a film or solid curtain of liquid.

;In one construction of washing device of the type described used heretofore, in which the derelation therewith by means of a plurality of slotted saddles or union members of elongated form spaced apart one from another in the direction of length of the pipes, the feed pipe was connected at the middle of its length to a supply pipe for water,-e. g. backwater from a papermaking machine, and the cleaning device comprised a rod carrying disc-shape scrapers or annular cutters in the delivery pipe, which rod extended through a stufling box at one end and could :be reciprocated by operating a handle member outside the pipe. In this known washing device, in order to economize water for the shower, the perforations in the delivery pipe were holes of small diameter and close pitch, and were liable to be stopped up if thic shower water, e. g. backwater containing fibre, were used. Moreover, it was found that when the rod became dirty, it was diflicult to work thecleaning device as the rod did not stufling box; also, during use, the dirt collected between the cutters on it, as the only outlet was by way of the perforations delivering the washing water which was very detrimental .to the perforations. 1

The present invention has for one of its objects to obviate these defects and to provide an improved construction of washing device of the type described which shallprovide an evenly distributed shower, and shall prevent sediment from collecting in the delivery pipe from the moment of starting the device working, and shall be generally more satisfactory in use than those proposed heretofore. 7

According to the invention there'is provided a washing device of the type described wherein the cleaning device is rotatable in the delivery pipe for the purpose of cleaning the outlets by means of a rotary motion.

August 21, Great Britain November 8, 1933 was carried by a feed pipe in spaced,

draw readily through the packing in the 1934, Serial N0. 1 10,770

According to a feature of the invention, the cleaning device may have the form of a screwconveyor that is rotatable in the delivery pipe and, when rotated, conveys sediment towards one end of the pipe. This arrangement ensures that the sediment is not removed through the outlets for the jets, whereby those outlets are not damaged by the removal oi sediment through them, and the sediment is prevented from reaching the surface on to which the liquid is being projected.

Preferably, the screw-thread of the conveyor is of coarse pitch and the screw-conveyor may be constituted by a strip of material twisted about its central longitudinal axis into the form of a spiral that is of a diameter substantially equal to the internal diameter of the delivery pipe, and is connected to a only one end.

driving spindle at In order to provide for an even delivery of the washing liquid when the cleaning device is being used and also when it is stationary, the screw-thread oi the conveyor may have perforations situated at or near its axis of rotation.

According to a feature of the invention, one end or the screw-conveyor may carry driving means trated by way of example in the accompanying drawings, wherein:-

Figure l is a perspective view showing one form of washing tion, partly broken away.

Figure 2 is a side elevation owing a modiiied form partly broken away, and

Figure 3v is a transverse vertical section taken onthelinel-IinFigure 2.

Figure 4 is a side elevation showing another modified form of washing device partly .broken away arranged to be driven by a rotary cylindrical member: I

Figure 5 is a longitudinal section showing a further modified form of washing device partly broken away, accommodated within a-rotatable screen, and

This toothed member.

device according to the inven- Figure 6 is a transverse vertical section taken on the line 68 in Figure 5;

Figure 7 shows a modified form of driving device of the cleaning device, and

Figure 8 is a vertical section taken on the line H inFi ure '7.

Like reference characters designate like parts throughout the several views.

Referring to the drawings, the washing device shown in Figure 1 comprises a feed pipe l0 closed at its ends by closure members ll, I2 detachable for cleaning purposes, and'having at the middle of its length a branch pipe H for connection to a supply pipe for water, e. g. backwater from a paper-making machine. A delivery pipe I6 is carried by the feed pipe in parallel relation therewith by a plurality of saddles or union members I! of elongated form spaced apart one from another between the pipes IO, it each of which saddles has a longitudinal slot I! (see Figure 2) extending in the direction of length of the pipes and placing the same in open communication one with the other. The delivery pipe [6 has a plurality of outlets 20 (see Figure 3) for jets 'of liquid spaced apart in a row in the direction of its length in its side opposite the feed pipe l0. Two end plates 22 fixed on the underside of the pipe It at its ends carry a baflle plate or fin 24 which lies parallel with the pipes Ill and I6 and is so arranged inclined at an angle to the plane containing the longitudinal axes of the pipes l0, l6 that the jets of liquid issuing from the perforations will impinge on the baflle and be converted into a film or solid curtain of liquid. Such a film or curtain exercises a chisel-like action when playing upon a strainer, drum or felt and is more efiective in washing the same than separate jets without a battle or fin, because when the wash water issues from circular perforations in the form of jets having each approximately the same diameter as the perforation, such jets impinge always upon the same spot on a fixed member, while the curtain impinges upon an entire line. A cleaning device in the delivery pipe I6 ,has a spindle II extending through a stufiing box 28 at one end 'of the pipe and can be operated by a handle member outside the pipe. As described so far, the washing device is known in itself and has the defects referred to above.

In order to prevent the dirt and sediment from controlling at the outlets for the jets, according to the invention, the cleaning device has the form of a screw-conveyor that is rotatable in the delivery pipe and, when rotated, conveys sediment towards one end of the pipe. As shown most clearly in Figure 5, the screw-conveyor is constituted by a strip 30 of material, e. g. brass, twisted about its central longitudinal axis into the form of a spiral that is of a diameter substantially equal to the internal diameter of the delivery pipe I6, and is secured to the driving spindle 3| at only one end by a slot and rivet connection, as shown at 23. The screw-thread of the conveyor constituted by the strip 30 is of coarse pitch and may have one turn or lea per foot length. For example, when the twisted strip is about 7 feet long, the pitch may be about 9 inches. When the screw-conveyor 30, II is rotated by a crank-handle 32 fast on the outer end of the spindle 3|, sediment in the delivery pipe I6 is conveyed towards the same end of the delivery pipe which is provided at 34 with an ,outlet controlled by a stop valve 35 which, when opened, allows the washing water containing the sediment to escape without its having to pass through the outlets 20 for the jets.

In the washing-device shown in Figures 2 and 3, the crank-handle 32 is freely rotatable on the spindle 3i and pivotally carries a pawl 38 which co-acts with a ratchet-wheel 39 that is fast on the spindle 3| and drives the latter when the crankhandle is rotated in one direction but not in the other, whereby it is ensured that the conveyor shall always be rotated in a direction to feed the sediment towards the outlet 34. In this construction the end plates 22 are slotted; the bafile or fin 24 extends slidably endwise through them, and is carried by brackets 40 that are fixed at spaced intervals to the delivery pipe l6 and have longitudinal slots 4| which extend parallel with the baflle which is detachably secured in position by means of screws 42 extending through the slots. This arrangement not only enables the baille or fin 24 to be moved endwise for subjecting different parts of it to the action of the jets, but also permits it to be removed and replaced in the reversed position, either side for side or end for end.

In the apparatus shown in Figure 4, inwhich the washing device is arranged for delivering water or other liquid on to a rotary cylindrical member 44, such as a screen mounted to rotate in a bearing 45 about a horizontal axis, a toothed member in the form of a star wheel 40 is free to rotate on the spindle 3| of the cleaning device and pivotally carries on one side a pawl 48 that co-acts with a ratchet wheel 49 fast on the spindle 4|. Immediately the screen 44 commences to rotate one or more dogs 50 mounted on its end rotate the star wheel 46 intermittently step-by-step and drive the screw-conveyor which operates as described above with reference to Figure 1.

Figures 5 and 6 show the washing device mounted within a rotary cylindrical member in the form of a screen 52 so as to project liquid against the upper part of its internal periphery. Liquid which falls back from the periphery is caught by a tray 54 which delivers it by way of a waste-pipe 56 outside the screen. This wastepipe extends through the trunnion 58 of the screen, and a supply pipe for supplying water to the feed pipe It! may enter an opposite trunnion and be attached to the adjacent end of the feed pipe I0. One or more dogs 60 carried by the end wall 6| of the screen are arranged to rotate a star wheel or like toothed member 46 on the spindle M of the cleaning device.

Instead of driving the cleaning device as described above, driving mechanism as shown in Figures 7 and 8 may be used comprising a star wheel 46 that is fast on the spindle II and is formed or provided on one side with a ratchet wheel 64, with which a pawl 66 co-operates that is carried by a part, such as the pipe l6, which is fixed in relation to the spindle ll. When the star wheel 46 is rotated intermittently in any convenient manner, it rotates the twisted strip 30 which, owing to its length, is resilient and after its driven end has been rotated, tends to return in the opposite direction. The holding pawl 66 prevents such rotation in the opposite direction and holds the conveyor in the position into which it has been moved angularly by the driving member.

As clearly shown in Figure 5, the screw 30 of the conveyor may have perforations 68 formed in it at or near its axis of rotation, for ensuring a free flow of liquid from the slotted members II to the outlets 20 during the rotation of the screwconveyor and when the latter is stationary, so that the delivery of liquid from the washing device Shall be substantially constant at all times whether the cleaning device is in operation or not and when commencing to operate the cleaning device or when stopping its operation. Such constant delivery is frequently important, particularly in the paper-making industry.

The outlets 20 for the jets may be of larger diameter and spaced further apart than heretoiore, thereby allowing thick shower water to be used without any risk of the holes becoming stopped up.

, The invention is not restricted to the precise constructional details enumerated. For example in some cases the cleaning device may have a multiple thread, and the outlet 0! the delivery pipe may be at its end remote from that at which the cleaning device is driven. Also, the feed pipe may be supplied from either end, and the screwconveyor may be driven continuously, as by a pulley and belt.

We claim:

1. A washing device of the character described, comprising in combination a feed pipe, a delivery pipe having a plurality of. outlets for liquid spaced apart in a row in the direction of its length, a plurality oi. union members supporting the delivery pipe from the feed pipe in parallel relation, which union members are spaced apart from one another and have each a longitudinal slot extending in the direction of length oi. the pipes and place the latter in open communication one with the other, a longitudinal baiiie arranged parallel with the delivery pipe for converting the jets into a film or curtain of liquid, and a cleaning device in the form of a screw-conveyor rotatable in the delivery pipe for cleaning said outlets, which conveyor has perforations situated at its axis of rotation for providingan even distribution of fluid from the feed pipe to the outlets.

2. A washing device of the character described, comprising in combination a delivery pipe having a plurality of outlets for jets of liquid spaced apart in a row in the direction of its length, a

cleaning device movable in the pipe for cleaning said outlets, and a longitudinal baiiie arranged parallel with said pipe for converting the jets into a film or solid curtain of liquid, which cleaning device has the form of a screw-conveyor that is rotatable in the delivery pipe and, when rotated, conveys sediment towards one end of the pipe, and driving means comprising a toothed member arranged to rotate the screw-conveyor intermittently.

3. A washing device or the character described, comprising in combination a delivery pipe. having a plurality o1 outlets for jets of liquid spaced apart in a row in the direction of its length, a cleaning device movable in the pipe for cleaning said outlets, and a longitudinal baifie arranged parallel with said pipe .for converting the jets into a film or solid curtain of liquid, which cleaning device has the form of a screw-conveyor that is rotatable in the delivery pipe and, when rotated, conveys sediment towards one end of the pipe, and driving means comprising a star wheel arranged to rotate the screw-conveyor a rotary member to which the liquid is to be supplied by the delivery pipe and means carried by the rotary member for intermittently rotating said star wheel.

4. A washing device of the character described comprising in combination a delivery pipe having a plurality of outlets for jets of liquid spaced apart in. a row in the direction of its length, a cleaning device movable in the pipe for'cleaning said outlets, and a longitudinal baiile arranged parallel with said pipe for converting the jets into a film or solid curtain of liquid, which cleaning device has the form of a screw-conveyor that is rotatable in the delivery pipe and, when rotated, conveys sediment towards one end of the pipe, driving means comprising a toothed member arranged to rotate the screw-conveyor intermittently in onedirection at one end thereof, and holding means arranged at the same end of the conveyor for holding that end against rotation in the opposite direction.

5. A washing device of the character described, comprising in combination a delivery pipe having a plurality of outlets for jets of liquid spaced apart in a row in the direction of its length, a cleaning device movable in the pipe for cleaning said outlets, and a longitudinal bailie arranged parallel with said pipe for converting the jets into a film' or solid curtain of liquid, which cleaning device has the form of a screw-conveyor that is rotatable in the delivery pipe, and, when rotated, conveys sediment towards one end of the pipe, and driving means comprising a spindle for rotating the conveyor, a rotary driving member,

and pawl-and-ratchet mechanism operatively connecting the driving member with said spindle .for rotating the latter in only one direction.

6. A washing device as claimed in claim 5, wherein the rotary driving member is freely rotatable on the spindle, a ratchet wheel is fast on the spindle, a driving pawl pivoted on the rotary driving member is arranged to drivethe ratchet wheel in one direction of rotation, and a holding pawl pivoted in fixed relation'to the spindle is arranged to hold the ratchet wheel against rotation in the opposite direction.

JOHN PARAMOR. HARRY SUCKLING.