US2455181A - Strainer - Google Patents

Description

Nov. 30., 1948 S. P. KINNEY ET AL STRAINER 3 Sheets-Sheet 1 Filed Aug. 2, 1943 INVENTORS SeZwyneB .Kzlmzey .Zlouis M HartWick Nov. 30, 1948.

. Fi led Aug. 2, 1943 s. P. KINNEY ET AL I STRA'INER 3 Sheets-Sheet 3 INVENTORS S eZ M30181? KiJm ey louis M. Harm Vick Patented Nov. 30, 1948 FFIQE STRAIN ER Selwyne P. Kinney, Grafton, and Louis M. Hartwick, Beaver, Pa., assignors, by mesne assignments, to S. P. Kinney Engineers, Inc., Pittsburgh, Pa., a corporation of Pennsylvania Application August 2, 1943, Serial No. 497,020

10 Claims. 1

This invention relates to industrial strainers, and particularly to strainers of the type referred to as basket strainers.

Basket strainers, although applicable for the straining of various solid-bearing liquids, are widely employed in systems for inducting water from natural streams and rivers to power stations and other industrial establishments. In such use the amount of solids may vary widely, as for example, in times of freshets or heavy waterfall, considerable more debris may be present than at normal times, and not infrequently schools of fish may be entrained.

Our invention is designed to provide a multiple compartment strainer which is flexible to meet to the best advantage such variations of operating conditions as may from time to time be encountered. It enables the individual strainers to be used alternately or successively, or both together, or even enables both or all strainers to be completely closed, eliminating the requirement for out valves which would otherwise be necessary. Our invention further provides a structure in which the valves are accessible for servicing through the same opening that gives access to the basket for removal and replacement, and, in addition, provides a door for this opening that effectively seals it but which may be easily and quickly operated.

Preferably the invention also provides a basket I designated to give a large area relative to the diameter of the basket.

Our invention may be readily understood by reference to the accompanying drawings, in which:

Figure 1 is a view partly in section and partly in front elevation of the strainer embodying my invention, the view being substantially in the plane of line II of Figure 2;

Figure 2 is a top plan view of the unit shown in Figure 1, the doors, however, being removed;

' Figure 3 is a broken transverse section in substantially the plane of line III-III of Figure 1;

Figure 4 is a transverse vertical section through one of the strainer units, the view being substantially in the plane of line IVIV of Figure 1;

Figure 5 is a section substantially similar to Figure 4 showing the casing construction with the valves and doors and other accessories removed;

Figure 6 is an enlarged section showing the construction of one of the doors and its operating mechanism, the view being a fragmentary view and the plane of the section corresponding substantially to the plane of the section of Figure 4;

Figure '7 is a perspective view of one of the door latching levers.

In the drawing, a multiple strainer unit utilizing two baskets is shown. It comprises two end members 2 and 3, being at the inlet and outlet ends, respectively, and being of similar construction, the end member 2 having a flanged connection 4 for connection toan inlet pipe, and it is flanged at 5 to set on the body to which it is bolted. Likewise, the end member 3 has a flanged pipe connection 6 for connection with an outlet pipe, and has a flange l to set on the body. Pipe connections 4 and ii are in axial alinement.

The main body of the strainer is designated 8. Viewed from the top it is generally of a bean-like shape, this bean-shaped upper portion being designated 9, and it encloses a chamber 10 coextensive with the area of the end portion. It is sur-' rounded by a flange H on which the flange 1 of the end member 3 is bolted. The opposite end portion l2 of the body is of a similar bean-like shape, enclosing a chamber l3 and having a flange It thereabout to which flange 5 of end member 2 is bolted.

Between the two bean-shaped end portions 9 and I2 the front face 8a of the main body member is flat and there are two axially extending chambers l5 and [6, which in transverse section are of a somewhat U-shaped form, there being a partition wall 11 (see Fig. 3) separating the tWo chambers, the chambers being otherwise enclosed by wall portions is of the body.

At each end of each chamber [5 and i6 is an end Wall I9 with a large opening 20 therethrough constituting a valve port, and a valve seat 2| is formed around each port. Access to the chambers i5 and i6 is provided by doorways 22 formed in the front face Ba of the body, which doorways are normally closed by doors 23, hereinafter more fully described.

Formed in the wall structure of the chambers l5 and i6 above the lower valve ports 20 are grooved guideways 24 that extend rearwardly from the doorways. These guides receive a rim structure 25 on the open end of cylindrical strainer basket 26 that may be slid in and out through the doorway. Preferably, to increase'its perforate area the bottom of the basket has a reentrant portion 21 concentric with the outer walls of the basket. The rimstructure 25 of thebasket, cooperating with the guides 2t and the doors 23, block the flow of fluid except through the basket.

Carried on the end member Zara-two glands 28 through which pass valve stems 29, on the inner inner end ofeachstem is a mushroom valve 382,

the valves 3%" cooperating with upper ports 20. Valve stems have operating hubs 3| with spokes 32.

Each door 23 is a square or rectangular panel,

outwardly convexed with a rim portion 23a aroundits periphery to seat and seal against the frame about the doorway. This rim-may carry aseallng.

gasket, as indicated.

Supported on lugs 33 arranged at intervals. around the door, near the edge thereof, are levers.

34, the outer ends of which. project beyond the rim. The inner ends of the levers extend under'a common rectangular pressure plate 35 which is slidable on a fixed center post 36. for movement toward or away from the door. A nut 31 with handles or spokes thereon, threaded on the outer end of the post 36, is provided for moving the pressureplate (see Figure 6) The outer ends of the levers project into yokes 38. pivoted. on the-body so as to be moved into or out of engagement with: the levers. Each yoke has an. adjustable bolt 3.9 thereon against which the lever. end bears andwhich forms an adjustable abutment. When. all of the levers are engaged with their respective, yokes, the hub or nut 31 is screwed. down, causing the pressure plate 35 to simultaneously pressdown the inner ends of' all the levers 34. The outer ends of these levers, being-v resisted by the yoke's, the door is forced down on its seat about the doorway, sealing it in place. The pressure, is efi'ective about the edge of the door over the gasket, and by adjusting the bolts 39, the pressure: at different points can be equalized or varied as may be required.

This arrangement for operating and securing thedoors enables the doors to be quickly and easily removed or replaced.

Each door may be provided with a pet cock 40 for'testing the pressure in the compartment or draining water therefrom oradmitting air thereto. In addition, a pipe El leads from each c0mpartment through a hand valve 42 to a pipe 43 that connects into the chamber at one end' of the structure to enable pressure on opposite sides of thelarge valves to be equalized, or relieved, while a second valve 44 opens to a drain.

The strainer as thusconstructed is of unique and rugged construction. It may be used. vertically or horizontally without change.- Baskets can be quickly removed. and'replaced. The valves and valve seatsare accessible through the doorways that open into the basket compartments, and? mud or debris can be easily removedtherefrom or gaskets replaced. In times when the water carries much. foreign materiahor when added flowof water is required, both compartmentsmay be used at the same time, giving double the normal straining area. Likewise, both compartments can be closed off at either or both ends so that'no'water or liquid can flow therethrough, thus eliminating need for separate cut-oil valves in; the system: ahead of or beyond the strainer unit. Incidentally, the positions of the valve stems indicates the. positions of the. valves.

While: the strainer has-been particularly described for use with water, it may be employed for oil-orother liquids. It will also be understood that. various modifications:v or changes may, be

4 made in the construction within the contemplation of our invention.

We claim:

l. A multiple basket strainer comprising a main body element with a plurality of longitudinally extending separate basket receiving compartments therein, a doorway witha closure. in the side of each compartment, a basket. removable through the doorway, a closure for each doorway, and a separately operable valve at each end of each compartment.

2; A multiple basket strainer comprising a main body element with a plurality of longitudinally extending separate basket-receiving compartments therein, a doorway in the side of each compartment, a basket removable through the doorway, a closure for each doorway, and a separately operable valve at each end of each compartment, said valves being accessible through the doorways.

3. A multiple basket strainer comprising a main body member having a pair of longitudinally extending compartments therein, a circular valve seat and port at each end of each compartment, an end member on each end of the main body member, there being achamber at each end of the bodyformed by the body and its end member, the chamber communicating through the ports with both compartments, a valve disk cooperating with each port and valve seat and movable in the direction of the axis of the compartments to open and close the ports, separate valve-operating means on the end members for the several valve disks, and a basket strainer in each compartment.

4'. A multiple basket strainer comprising a main body member having a pair of longitudinally extending compartments therein, a circular valve seat and port at each end of each compartment, an end member on each end of the main body member, there being a chamber at each end of the body formed by the body and its end memher, the chamber communicating through the ports with both compartments, a valvedisk cooperating with each port and valve seat and movable in the direction of the axis of the compartments to open'and also close the ports, valveoperating means on the end members for the several valve disks, and a basket strainer in each compartment, said body having a doorway therein for each compartment intermediate its ends, and a closure for each doorway.

5, A multiple basket strainer comprising a main bodymember having a pair of longitudinally extending compartments therein, a circular valve seat and port at' each end of each compartment, an end member on each end of the main body member, there being a chamber at each end of the bodyformed by the body an'd'itsend member, the chamber communicating through the ports with both compartments, a valve disk cooperating with each port and valve seat and movable inthedirection of the axis. of the compartments to open and close the ports; valve-operating means-on the end members for'the severalvalve disks;.and a basket strainer in each compartment, said? body having a laterally opening doorway therein foreach compartment, and a closure for each doorway; the valves and valve seats being accessible through the doorways.

6, A multiple basket strainer comprising a main body member having a, pair of longitudinally extending. compartments therein, a circular valve seat-and port at each endof each compartment, an end member on each end of the main body member, there being a chamber. at each end of the'body formed by the body andlits endmember,

the chamber communicating through the ports with both compartments, a valve disk cooperating with each port and valve seat and movable in the direction of the axis of the compartments to open and close the ports, valve-operating means for the several valve disks passing through and mounted on the respective end members, and a basket strainer in each compartment, said body having a doorway therein for each compartment, and a closure for each doorway, each compartment being generally U-shaped in transverse section, each compartment having a guideway extending around the interior thereof and terminating at the doorway, each basket strainer being generally cylindrical and having a rim portion received in the g-uideway, said rim forming an impervious barrier.

7. A multiple basket strainer comprising a main body member having a pair of longitudinally extending compartments therein, a circular valve seat and port at each end of each compartment, an end member on each end of the main body member, there being a chamber at each end of the body formed by the body and its end member, the chamber communicating through the ports with both compartments, a valve disk cooperating with each port and valve seat and movable in the direction of the axis of the compartments to open and close the ports, valve operating means for the several valve disks mounted on and passing through the respective end members, and a basket strainer in each compartment, said body having a doorway therein for each compartment, and a closure for each doorway, each compartment-being generally U-shaped in transverse section, each compartment having a guideway extending around the interior thereof and terminating at the doorway, each basket strainer being generally cylindrical and having a rim portion received in the guideway, said rim forming an impervious barrier, each basket having a reentrant perforate cylindrical end portion therein, the open ends of the baskets being directed downwardly.

8. A multiple basket strainer comprising a main body member having a pair of longitudinally extending compartments therein, a circular valve seat and port at each end of each compartment, an end member on each end of the main body member, there being a chamber at each end of the body formed by the body and its end member, the chamber communicating through the ports with both compartments, a valve disk cooperating with each port and valve seat and movable in the direction of the axis of the compartments to open and close the ports, valve operating means for the several valve disks mounted on and passing through the respective end members, and a basket strainer in each compartment, and a valved connection leading from each compartment to the chamber at one end of the structure to enable pressures on opposite sides of the valves of a compartment to be equalized.

9. A strainer of the class described comprising a body having a single chamber at each end thereof, and a plurality of individual compartments between the two end chambers, the compartments each opening into the chambers at each end through a port, an end member at each end of the body closing the chamber, a plurality of valve disks with operating stems carried on each end member, each valve cooperating with one of the ports and serving to control the flow of fluid between the chamber and one end of a compartment, the body having a separate doorway opening into each compartment, a closure for each doorway and a basket strainer in each compartment removable through the doorway.

10. A two compartment strainer comprising a body having two parallel chambers therein, a strainer in each chamber, a valve port centrally positioned at the end of each chamber, a cover member over each end of the body providing with the body a common chamber at each end of the body, a valve disk over each valve port, separate valve operating shafts for each disk mounted on and passing through each of the covers, there thus being two such shafts passing through each cover, and a pipe connection on each cover midway between the operating shafts and offset to one side of the center line passing through both shafts.

SELWYNE P. KINNEY. LOUIS M. HARTWICK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,337,756 Darlington Apr, 20, 1920 1,625,024 Hall Apr. 19, 1927 1,685,303 Voorheis Sept. 25, 1928 1,758,565 Elliott May 13, 1930 1,919,031 Muhleisen July 18, 1933 1,965,368 Burnish July 3, 1934 2,019,169 Backlund Oct. 29, 1935 2,064,030 Pierce Dec. 15, 1936 2,068,468 Phillips Jan, 19, 1937 2,199,765 Velie May 7, 1940 2,305,351 Hellan Dec. 15, 1942 2,354,752 Hellan Aug. 1, 1944 2,359,938 Quiroz Oct. 10, 1944 2,365,074 Harvuot Dec. 12, 1944

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