US2683581A - Fabricated stainless steel gate valve - Google Patents

Description

w. s. ROVANG 2,683,581

FABRICATED STAINLESS STEEL GATE VALVE Filed April 16, 1949 2 Sheets-Sheet l m/z/e/v 717R WALLACE .s. ROVANG y 1954 w. s. ROVANG 2,683,581

FABRICATED STAINLESS STEELGATE VALVE Filed April 16, 194 2 Sheets-Sheet 2 H //\//E/\/ TU WALLACE G- ROVANG Patented July 13, 1 95 4 TED STATES ATENT OFFICE Wallace G. Rovang, Portland, reg., assignor to Fabri-Valve Company of America, a corporation Application April 16, 1949, Serial No. 87,865

1 Claim.

This invention relates generally to valves for controlling the flow of fluids and particularly to low pressure gate valves which are fabricated of stainless steel or having their seating surfaces protected by a chrome plating or otherwise protected against the action of the fluids passing therethrough.

The main object of this invention is to make a light weight valve for handling low pressure fluids such as are commonly found in paper mills.

The second object is to avoid the high cost of cast valves where large flows are handled at relatively low pressures.

The third object is to avoid the uncertainty of flaws and defects commonly found in cast parts.

The fourth object is to construct a valve of this type which will be easy to transport and handle for installation purposes.

The fifthobject is to so construct the valve that pattern and other equipment commonly employed with casting process are not required and my valve adapts itself to the production of one or more valves of a given size or type without unduly increasing the cost of fabrication.

I accomplish these and other objects in the manner set forth in the following specifications as illustrated in the accompanying drawings, in which:

Fig. l is a side elevation of the valve.

Fig. 2 is an end elevation of the valve with parts broken away in section.

Fig. 3 is an enlarged fragmentary section taken along the line 33 in Fig. 2.

Fig. 4 is a fragmentary section taken along the line 4-4 in Fig. 3.

Fig. 5 is a fragmentary view of a gate and its guide in an open position.

Like numbers of reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawings, there is shown a pair of tubular body members H3 whose opposite ends have outturned flanges H secured thereto by means of the welds 12.

The adjacent edges l3 are inclined in opposite directions and contain the valve seats :4 which are made of a material which will resist corrosion such as stainless steel or plated with a protective coating of chromium or other metal, depending upon the use of the valve.

On each tubular section I0 is rotatably mounted a ring l5 which is used to connect the valve to a pipe or fitting. The ring I5 is a cast section and, being movable, facilitates the alignment of the holes 16 with corresponding 2 holes in the member to which it is fastened.

Around one-half of the tubes l0 and overlapping the edges [3 is a band I! which terminates in the parallel sides H! which are joined by the saddle plates l9. The band ll and plates l9 are secured to the tubes H) by means of the welds 20.

A flange 2| is secured around the sides l8 and plates I9 by means of a Weld 22.

The gate itself consists of a pair of converging disks 23 which are held in spaced relationship by the ring 24 and welds 29. The ring 24 is set inside of the outer edge of the plates to provide a Welding corner, thereby forming a channel 26 around the gate.

Secured in the widest part of the channel 26 is a filler plate 21, on which is mounted a tubular shank 28 which is secured to the plate 21 and disks 23 by means of the welds 29. The shank 28 is threaded to receive the threaded sleeve 30 which is provided with a locking screw 31.

A stem 32 extends upwardly from the sleeve 30 and its head 33 is held between the plate 2'! and sleeve 30.

stiffening ribs 34 are held between the disks 23 by means of the spot-welds 35. At the narrowest portion of the channel 26 is welded a stop 36 which engages a stop screw 31 which is threaded through the band I? and the thickening plate 38. A look nut 39 is provided for the screw 31.

On opposite sides of the ring 24, between its widest and narrowest portions, are secured the curved slides 40 which can pass freely between the guides 4| secured along the band ii and the straight sides I8. The purpose of the members 40 and 41 is to guide and support the gate when not in a closed or seating position.

In order to form a space for the gate in a raised or open position, there is provided a housing consisting of a rounded top 32 whose straight sides 43 are parallel with the sides H3. The ends 44 connect the sides 43 and top 42.

A flange 45 is provided at the open end of the housing by means of which it may be secured to the flange 21 by the bolts 46.

Stifiening ribs 41 are secured across each of the straight ends 44.

On the top 42 is secured a saddle base 48, upon which is bolted a standard 49, at whose upper end is disposed a plate 58 which has a sleeve 5|, within which is rotatably mounted a nut (not shown), through which extends the threaded end 52 of the stem 32. The nut within the sleeve 5| is attached to the bevel gear 53.

3 which meshes with the pinion 54 which, in turn, is supported by a bracket 55 from the plate 50 and driven by the hand wheel 56. This form of construction for driving a gate valve stem is well known in the art.

t the top of the base 48 is secured a tubular stuffing box 51 having ears 58, to which are attached the eye bolts 59 which pass through the lugs 69 of the gland Bl, by means of which the packing 62 may be compressed around the stem 32.

From the foregoing, it can be seen that the valve which I have described possesses a number of desirable characteristics not prominent in cast valves. It is light in weight, easy to fabricate, regardless of quantity, low in cost, uses thin walls making it practical to use more desirable noncorroding metals.

The stiffening rods 34 may be placed as shown in Fig. 5 or placed in fan shape with the lower ends closest together since it is this portion of the disks 23 which is subjected to the most violent action of the fluids passing through the valve.

I claim:

A low pressure gate valve constructed of rolled stainless steel plate comprising a pair of tubular body members in axial alignment, the adjacent faces of which are oppositely inclined and spaced to form a tapering channel therebetween, a band covering the lower half of said channel and having a pair of parallel tangent sides, saddle plates covering said band sides, valve seats welded around the adjacent ends of said tubular members extending beyond their inclined edges, valve disks between said faces, means for actuating said valve disks, and valve guides mounted on the inner sides of said tangent sides and extending part way around the rounded portion of said valve.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,213,259 Redding Jan. 23, 1917 1,638,546 Murray Aug. 9, 1927 1,648,071 Sparks Nov. 8, 1927 1,658,374 Ericsson Feb. 7, 1928 1,921,280 Blake Aug. 8, 1933 1,935,329 Needham Nov. 14, 1933 2,054,445 Plant Sept. 15, 1936 2,065,628 Taylor et al Dec. 29, 1936 2,363,943 Carlson Nov. 28, 1944 2,514,532 Allen July 11, 1950 FOREIGN PATENTS Number Country Date 719,338 Germany Apr. 4, 1942

Images