US660193A - Globe and check valve. - Google Patents

Description

UNITED STATES PATENT OFFICE.

CHRISTIAN E. LOETZER, OF SAYRELPENNSYLVANIA.

lGLOBE AND CHECK VALVE. y

SPECIFICATION formingpart of Letters Patent No. 660,193, dated October 23, 1900.

Application filed April 6 1900.

To @ZZ whom t may concern:

Be it known that I, CHRISTIAN E. LoErzER, a citizen of the United States, residing at Sayre, in the county of Bradford and State of Pennsylvania, have in ven ted certain new and useful Improvements in Globe and Check Valves; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in valves for regulating the iiow of iiuid, such as globe and check valves.

It is often desirable, as is well known, to have immediate access tothe chambers or interiors of valves of Water-pipes, steam-boiler feed-pipes, and the like for the purposes of cleaning, removing obstructions, and making alterations or repairs without the necessity and inconvenience of drawing o the water or other fluid and detaching the valve-casing from the pipes, as is necessary with the ordinary check and globe valves. Numerous constructions have been devised whereby the flow of water through the valve may be cut off and access then had to the valve-chamber and valve-seat through the valve-casing; butsuch contrivances have been more or less objectionable in use on account, -in some cases, of the complexity of the construction audits liability to get out of order and in other cases the inconvenience and difficulty of manipulation incident to the removal and disconnection of the parts of the structure and the reassembling of the same for cleansing purposes, as well as the liability to leakage in use.

The object of my invention is .to simplify the construction and increase the efficiency of this class of devices and to provide a simple and inexpensive but thoroughly efficient valve for regulating the iiow in water-pipes and the like, with provision for cutting off the 110W of fluid through the valve and for ready and immediate access tol the' valvechamber through the casing, b ut'without the disadvantages and objections hitherto noticedV in devices of this character.

The invention will first be hereinafter more particularly described with reference to the accompanying drawings, which form a part sena No. 11,834. (N0 moda.)

of this specitication, and then pointed out in the claims at the end of the. description.

In said drawings, in which corresponding parts in the different views are designated by like letters of reference, Figure l represents in vertical section a globe-valve embodying my invention. Fig. 2 is a similar view of a modification of my invention as embodied in a check-valve, the parts being similarly arranged. Fig. 3 is a sectional view similar to that shown in Figs. l and 2 with theplug tu rned so as to cut off communication between the inlet and discharge orifices of the casing, the bonnet or cap and also the valve proper being removed to permit access to the valveseat; and Fig. 4 is a view similar to Fig. 3, showing a reaming tool inserted into the valve-chamber for the purpose of truing the valve-seat.

The letter Ain the drawings denotes a suitable valve shell or casing having the lateral oppositely-projecting end portions B and B, which are threaded to engage threaded pipe ends, adapting the valve to be placed between and connect two pipe-sections. The interior of the shell or casing A for receiving the plug which controls the opening therethrough may be cylindrical -or taperedAv in` the form of an inverted frustum of a cone and open at topf and bottom, and the said chamber communi- Acates with the inlet portion B preferablyl by a lateral orifice h at its lower portion and'with the exit or discharge portion B byfa similar orifice b. y

Fitted closely within the shell orcasing A, but in such manner as to be revoluble therein, is a hollow 0r`cup -like plug C, forming a `valve-chamber and having lateral oriices c and c', oppositely disposed in the lower and upper portions of the'cup, respectively, adapted to register with the orifices h and b', so as to establish communication between the inlet B apd outlet B through the plug in v011e position of the turning plug C, as in Figs. 1 and 2, but to face the interior walls of the casing or shell A and shut off communication between the said inlet and exit when the plug is turned in the opposite position or given one-half of a revolution, as in Figs. 3 and 4. The plug C is further interiorly provided between the orifices c and c with a suitable IOO check-valve such as is employed in feed-pipes for steam-engine boilers and the like adapted to rise and fall automatically according to the pressure on opposite sides of the valve.

The valve casing A', wherein is fitted the turning plug C, is preferably prbvided with an enlarged interiorly-screw-threaded portion a to engage a similarly exteriorly-threaded portion of the bonnet or cap G, Fig. l, or G', Fig. 2, which cap closes the cup or valvechamber within the plug C and also the upper part of the casing, so as to prevent leakage ot' the fluid between the walls of the plug and the valvecasing. It will be observed that by virtue of the enlarged threaded por tion a an annular ledge' or shoulder a2 is formed within the valve casing above or around the top of the chamber in which the cup-like plug C is fitted, and t-he top of the plug C is preferably flush with said ledge or shoulder, and the lower portion ofsaid bonnet or cap G or G bears partly on said ledge and partly on the plug, thereby thoroughly preventing leakage between the plug and the walls of the Valvecasing and confining the plug tightly in place. The cap or bonnet G (shown in Fig. l) is provided with a central interiorly-threaded opening for engaging the threaded valve-stem e, and said cap G may be exteriorly threaded at its upper portion and provided with an interiorly-threaded cap H, surrounding the valve-stem a. The bonnet or cap G (shown in Fig. 2) is closed at the top, but may be provided with acentral guidepassage, as g', for guiding the valvestem e as the valve rises and falls. Preferably the bonnet G or G and the interiorlythreaded portion a of the valve-casing A are threaded to a standard-pipe size, so that in cases of emergency or accident a common pipe-plug may be substituted for the capor bonnet.

The plug C is provided with an extension below the valve-chamber, a portion of which may be screw-threaded, as at o3, Fig. l, to engage a fastening-nut 7c for locking the plug within the valve-casing, while the pendent portion c4 may be polygonally shaped for engagement with a wrench for the purpose of turning the plug within the casing A. The polygonal portion c4 being formed in the lower solid portion of the plug C, the plug will not be injured or its Walls indented by the wrench.

It will be apparent that the nut 7o serves not only to lock the plug within the Valvecasing, but also to prevent leakage. In Fig.

2 is shown a` modification of the nut, which is denoted by the letter 7a', said nut heilig formed integrally with a cap k2, covering the `lower portion of the plug C.

When it is desired to have access to the valve-chamber for cleaning or removing obstacles from the valve or for making alterations or repairs, the How' of water or iiuid `through the valve may be immediately cut off by turning the plug C one-half of a revo lution, as in Figs. 3 and 4, without drawing h the water-pressure from; the pipes or operating other valves in the pipe-line, as is usually necessary. The cap or bonnet may then be removed and access had to the Valvechauiber.

Fig. et shows a repairing-tool or millingreamer L inserted into the valve-chamber or plug C for the purpose of truing the valveseat. The tool L is provided with a stem Z, guided in a sleeve or opening through a `guide block or plug M, having a portion m liitting within the upper chamber or portion of the valve-chamberwithinthe plug` C. By revolving the tool L the valve-seat may be `ground and trued. The valve may likewise be reground or a new valve inserted. l It will be apparent that with my device ac cess may be had to the valve-chamber and irepairs made at any time with full pressure on Within the pipes. Thus in the case of a lfeed-pipe for boilers the necessity of waiting ffor the boiler to cool and to reduce the pressure in the boiler is avoided. Furthermore, ithe plug C forms a brace or support through he casing A, so that the valve-seat is not liable to be twisted or bent out of shape and becoine leaky, as is the case with the usual lform of valve when the valve is screwed into a line of pipe.

It will be observed that the plug which controls the inlet and exit openings through the valve-casing at different elevations, so as to `balance the valve when seated, is confined within the casing bythe cap or bonnet, which is secured to the casing above said plug and serves also as a cover or closure for the valvechamber in said plug, as well as for the opening at the top of the valve-casing, whereby I avoid the liability to leakage which is incident to the use of a turn-plug having a cap or bonnet mounted thereon, and, furthermore, the plug and the valve seated therein are snugly housed Within the casing without any projection of the plug above the same, which is liable to cause injury to the plug, resulting from a stroke by accident or otherwise from the outside, and instead of manipulating the plug from above, as usual, it is manipulated from below the casing, through whichits lower end protrudes, and the upward pressure of the water is exerted against the cap or bonnet, while the downward pres- Isure is exerted on the plug only, thus tending to maintain a close contact of the plug with the interior of the valve-chamber or casing in which it is housed, so as to eiectually IIO seal the joints, the pressure of the valve itself when seated being similarly exerted.

I thus provide a very simple, efficient, and durable device adapted for use either as a globe-valve or a check-valve, in either of which constructions access is readily aorded to the valve-chamber to permit the removal of obstructions or repairs or for truing the valve-seat by simply removing the cap and lifting the valve from its seat without rendering it necessary to remove the plugor other parts of the device.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

l. A globe or check valve comprising a casing having oppositely-disposed openings at its top and bottom, open end portions extending transversely of said openings, and an intermediate valve-chamber having an inlet at one side and an outlet at the other side thereof arranged above the plane of the inlet, the

forming an annular shoulder around the top of said chamber, a cup-like plug revolubly fitted in said valve-chamber having one end protruding through the opening at the bottom of the casing adapted to receive a tool for turning the plug; said plug having inlet and outlet ports which register with the inlet and outlet orifices of the valve-chamber and adapted to close the same When the plug is given a partial revolution, a reciprocatory valve seated within said cuplike plug in a plane dividing the inlet from the outlet port-s therein, and a cap removably fixed within the opening at the top of the casing so as to close the same; said cap being adapted to rest on said plug and on said annular shoulder above the valve-chamber, so as to tightly confine the plug and prevent leakage between the same and the walls of said chamber, and also serving as a guide -for the valve-stem in its reciprocatory movements in establishing communication between the inletand outlet ports of the plug, substantially as described.

2. In combination with the valve-casing open at top and bottom, and having oppotop of the casing being of greater bore than said valve-chamber and thus forming a shoulder above the same, a tapered cup-like plug Afitted Within said valve-chamber having a valve-seat about midway of the interior of the cup, an inlet-port below said seat and an outlet-port at the opposite side thereof above said seat, together with a cap removably xed within the opening at the top of the casing so as to close the same and confine the plug Within the valve-chamber, said cap bearing on the plug and also the shoulder formed at the top of the'valve-chamber so as to prevent leakage between said plug and chamber, and a reciprocating valve on said seat having its stem fitted and guided in an aperture in said cap; said plug having a polygonal projection protruding through the opening in the bottom of the casing for the application of a suitable tool for turning the plug, and a nut screwed on said projection for securing the plug Within the casing; substantially as described.

3. The valve-casing having acentrally-disposed chamber and oppositely-disposed end portions and top and bottom openings communicating withv said chamber; the upper openin g of the casing having a greater diameter than the intermediate portion,to provide an annular shoulder at its junction With the latter; in combination with a cup-like turnplug fitting the aforesaid chamber and having its upper end substantially flush with said annular shoulder, together with a detachable cap or part tting the upper opening of the casing, constructed to guide and limit the movements of the valve-stem or like part, and having a bearing upon said turnplug and annular shoulder, substantially as described.

In testimony 'whereof I affix my signature in presence of two Witnesses.

CHRISTIAN E. LOETZER.

Witnesses:

A. B. SHEURER, CLAYTON BERGHAUS.

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