US1970888A - Balanced, plug-type, throttle valve - Google Patents

Description

Au 21, 1934. F. HENNEBOHLE BALANCED, PLUG TYPE, THROTTLE VALVE Filed Jan. 16; 1933 3mm Wan Henne'o/z Ze Patented Aug. 21, 1934 Application January ld,

My invention relates to throttle valves of the plug type and it particularly hasfor its object to provide waive which is held seatedbyfiluid' pressure without the use of springs.

to its seat, with means to balance the valve, thereby preventing more wear on one side than on the other, and means to hold the valve tagainst leaving its seat when no pressure is within the valve.

, Further, it is an object to provide my improvements in both angle valves and straight valves. Other objects will in part be obvious and in Ljpart be pointed out hereinafter.

To the attainment of the aforesaid objects and ends, the invention still further resides in the novel details of construction, combination and arrangement of parts, all 'of which will be first fully described in the following detailed description, then be particularly pointed out in the appended claims, reference being had to the accompanying drawing, in which:-

Figure 1 is a vertical longitudinal section of my invention as an angle valve.

Figure 2 is a section on the line 2-2- of Figure 1.

Figure 3 is a vertical longitudinal section of my invention as a straight valve.

Figure 4 is a section on the line 44 of Figure 3.

Figure 5 is an elevation of the valve shown in Figure 3.

In the drawing in which like numerals and letters of reference indicate like parts in all the figures, 1 is the valve casing which has a frustoconical partition 2 dividing the inlet from the outlet of the valve. This partition has diametrically opposed ports 33 to effect communication between the inlet and outlet of the casing 1. The inner face 4 of the partition 2 is ground to constitute a frusto-conical valve seat for the plug-valve proper 14. The plug-valve is of frusto-conical form and has its. outer face ground to fit the face 4 of the partition 2. It also has diametrically opposite ports 15, 15 which at times register with the ports 33 of the partition 2. One end of the valve proper 14 is open and is constantly in communication with the inlet 10 to the valve casing 1, while .casing 1 into which it projects so as to leave a space surroundingthe seat 16, which space is p ,i;9t0,8 ii i 11 BA ANCED, PLUG-TYPE, THROTTLEJVALVE I": ankj-H f m time 1- in commandant-1r with "theinteri'or ofljthevalve- 14- by means of a port" 1'7. 1 "Thus the; end-thrust of the valve 14, due to the pressure at theinlet r w v thereof,;is' effective only over the area of the" -An ob ect ofthe invention is to provide such" a valve with means to prevent the valve sticking seatdfi "and-that'of thebross-sectioh of the 66 stem 1-8l z. T

The valve -s'tem 18 passes through the packed land 6',""7, 8, and ha'sit's end squared-to receive any suitable instrument for turning the valve, as a hand-wheel, wrench, etc., etc.

The outlet neck 20 of the casing is internally threaded for attachment to a pipe line.

It will be observed that the valve proper 14 and the side wall seat 4 taper slightly toward the closed end of the valve so that the pressure 7e3 of fluid entering at 10 will exert a pressure tending to tightly hold 14 and 4 in contact with a wedging action, which if unrestrained would cause sticking of the valve.

To prevent sticking I have provided the thrust 75".? bearing surface 16 whose area of contact with casing 1 is so proportioned to the area of side wall contact at 4 that the wear on the surfaces 4 and 16 approximately balance each other, and hence a close contact is at all times mintained between the outer face of valve 14 and its seat 4 without undue pressure which would cause sticking.

In the angle valve the flanged union 10 has its skirt 12 fitted tightly into the threaded inlet v; neck 9 to project almost into contact with open end of the valve 14, and serves to prevent the valve being pushed in clear of its seat when no pressure is present on the inlet side of the same.

In the straight valve, Figures 3, 4 and 5, this is 0 accomplished by means of a rod 24 set into a recess or socket 22 in the stem 18 and held in a socket 23 in the cap 21 which fits the threaded neck 9 of the casing i The inlet of the valve casing 1 in Figures 3 and 4 is indicated by 10. 33 All other parts of the valve mechanism of Figures 3, 4, 5, which are like corresponding parts in Figures 1 and 2 bear the same reference number plus the index letter a, so a further detailed description of the straight valve is thought b to be unnecessary.

It is to be observed that the parts 3-15, or 3 15 as the case may be, are also tapered in elevation to correspond with the taper of the valve proper, thus making for a uniform opening and closing of the ports when the valve proper is turned.

What I claim is:

1. A plug-type throttle valve, comprising a cas- 1 ing having an inlet and an outlet,.and having a small port passing through the same and having an end-thrust surface of lesser diameter than the end of the valve, said casing having an endthrust bearing surface engaged bysaidend-thrustsurface, and said end-thrust surface being so related to the area of the frustor-conical' valve seat surface that wear on each will approximately balance so that contact between said respective surfaces will always bemaintained, and the valve proper-will be held against sticking, and means to prevent the valve proper being unseated when fluid pressure within the. valve is absent.

2; A plug-type throttle valve, comprising a casing having an inlet and an outlet, and hav-- ing. apartition' dividing the inlet from the. cutlet, said partition having a 'frusto-conical: valve seat surface and having diametrically opposite ports, a tubular frusto-conical valve proper located in said casing on said seat and having diametrically opposite ports to register with those of said partition, the, larger end of said valve proper being constantly in communication with the inlet side of the valve casing, said valve casing having a packed neck and said valve proper having a stem projecting through said neck, said valvev proper having its smaller end closed save for a small port passing through the same and "havin'gan end-thrust surface of lesser diameter than the end of the valve, said casing having an end-thrust bearing surface engaging by said endthrust surface, and said end-thrust surface being sorelatedto the area of the frusto-conical valve seat surface that wear on each will approximately balanceso that contact between said respective surfaceswill always be maintained, and the valve proper will'be held against sticking, and means to prevent the valve; proper being unseated when fluidpressure within the valve is absent, said last. named means.- comprising a socket in the valve:

proper, a cap carried by said casing and having a socket, a: rod having, its ends located in said sockets for longitudinal movement. I

FRANK HE NEBoHm

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