USRE14516E - Btbom - Google Patents

Description

S. J. NORDSTROM. LUBRICATEDHYDRAULIC PLUG VALVE.

APPLICATION FILED JUNE l. ISLE.

Reissued Aug. 27, 1918.

FIG. 2.

attend at,

I emu, engineer, a sub'ect of the Kin is a vertical. longitudinal section and "the pressure thepa'ckinlg I "DgsrATEs-PATIM svmr .romn'nonns'raou, or jinn co,

Lunmcarnn nrnnaum'c, 1'LUG-VALVE.

specification of Reissued Letters Patent. Bigsued Aug. 27,1918.

01mm in. 1,1ao,a1a, amq April as, 1910, Serial m. 59,294, flied liovemher a, mu: Appllcationfor To all whom it mag concern:

Be it known thatI, SVEN JoHAN" None;

Sweden, residing at exico, Federal trict, Mexico, have invented certain new and". useful Im rovements in Lubricated Hydraulic Plugalves, of which the following is 8..

specification.

.My Invention refers to a cock or plug valve particularly adapted for pipe lines containing or conveying corrosive liquids which in ordinarycocks tend to rust-the plug fast to the valve bod making the operation of the plug very iflicult.

The object of the invention is to construct a cock in which the plug shall always be lubricated and if necessary can be raised,

under its lower extremity.

Another object is to provide the aforesaid plug at. its lower and. smaller end with acentral and ad'ustable support to prevent from causing too much friction between t e plug and the valve chamber.

In"the ccompanymg drawing: Fi re 1 ig. 2 is a horizontal section ofithe same.

Referrin to the drawin (1) indicates the valve rovided with flanges (2) by which it may connected to the tubing.

In the upper part of the valve body a rin (3) is mounted to retain the packin (4% around the shank ofithe plug, the ring ing :held in place by 'means of screws (5).

Within the valve chamber e((16) is mounted .a conical plug rical passages cross section (10.)

:7) provid with diamet- 8 and (9) which allow liquid topass when the plug is turnedto open'position. Aforesaid plug is at its upper large end rolonged into a cylindrical shank to form t e packing seat, and above the packing is of a square or other convenient for the application of a wrench or hand e :bywhich the cock is operated. This prolongation of the plug is readed'for the insertion of perbrated and. t a screw (11). Said perforation, (12-) consti tutes a lubricant receiving or'cham- The bottom (18) of the reissue fled June 1,- 1918. Serial 10.287382.

I ber and communicates with ra'dialhannels (13 which attheir outer ends communicate wit I channels (13 in the wall of the plug closed position which it has in Fig. 2 is 90 toward the left, owing to the stof (21) in 0".

which case the ports (8) and (9 will be placed in alinement with the tubing, letting the liquid pass. The channels set of from t e center 'ne of the ports (8) and (9) and will therefore sweep and lubricate the walls of the valve chamber (6) without ever coming in contact, with the liquid.

15S) are laced with oif- In Fig. 1, with the object of better illustrating the construction, one of the channels (13) 1s shown turned to a position'which It will never take in actual practice.

The bottom of the valve body,"(1) is provided with a threaded perforation (15) into which is inserted a screw (16 with its locknut 17 to hold it in its .ad uSted position.

plug (7;) has a central incision (19) in w ich rests an antifriction ball (20) turnin freely on the flat end of screw (16). e ob ect of this central sup ort is to counteract the pressure of the pac ing which tends to force the plug (7) into valve chamber (6') and would roduce great friction due to the conical orm of the seat. The operation of the valve is as follows: Supposing the, valve to be found stuck, that is, the plug (7 rusted fast to its seat (6) due to the action of the corrosive liquid, it can be broken loose andof lubricant to enter on the conical surface to be spread plug.

surface owing to the conical form of the seat; the screw (16) will then be screwed in, lifting the m lug a trifle to conveniently reduce the frictlon, and as soon as this os1- tion is attained, the locknut (17) wil be tightened so as to ermanently secure this 1 position, which will not be changed until, on account of wear the plug may have sunk too deep into the valve seat. Any 20 other mechanical disposition for obtaining the aforesaid functions, of the support, naturally may replace the support here described as for example, by replacing the a nti-frietion ball by any other loose memher to accommodate any possible eccentricity of the supporting screw (16) in rela- -tion to the plug (7), or by making the plug (7) without lIlClSlOD (19) and letting it rest directl on the end of screw (16). The

valve ody may have any convenient form and may be provided with flanges, as has i been illustrated, or with threads so that it may be connected to the pipe line.

Insteadof placing the channels (13) in plug (7) they can be made in chamber (6) of the valve body (1). The screw (11) can also be placed in valve body 1) forcing the lubricant directly into chamber (14) or into the channels (13) and equally other modificatmns may be made in the construction without departing from the spirit of the invention.

Having thus described my invention, what I claim is the following:

a seat and provided at the lower: end of said seat wlth a lubricant chamber, a pluglmount- .ed'ln said seat and extending into said lubricant chamber, radial channels formed in thew upper end of said lug and extending downward exteriorly o the plug into communication with said lubricant chamber, the upper end of the plug having a vertical bore constituting a lubricant receiving ocket communicating with the radial c annels, the

lubricant chamber and lubricant receiving pocket being in communication through the all over same, by turning the The central ad'ustable support is made to ollowing .way: The screw 1. In a plug valve, a valve casing having a taperin a tapering plug mounted in said seatwith its lower end extending into said chamber,

said plug atits upperendhaving a perfo-' rated shank projecting through the casing and provided in said upper end with channels communicating exteriorl with said-chamber, an adjusta lesupporting bearing for the lower end of said plug, and a closure in the perforation of said shank forming a lubricant compressor.

3. In a plug'valve,-a valve casing having a tapered seat and provided with a lubricant chamber at the lower end of said seat, a

tapered plug fitted in said seat and having its lower end received in said 1 lubricant chamber, an adjustable supporting bearing for the lower end' of said plug maintainin a space between the bottom of the plug an the base of the lubricant chamber, radial channels at the upperend of said plugin communication exteriorly of the plug with the lubricant chamber, and lubricant compriassing means associated with said channe s.

4. In a plug valve, a valve casing having a seat provided with a lubricant chamber, a plug tting said seat with one end extend ing into the lubricant chamber, a lubricant receivin pocket in one end of the lug, a radial c annel le ing from the lubricant receiving pocket t the exterior of the plug, a channel in the exterior face of the plu communicating with the radialchannel an the lubricant chamber, said channels establishing constant communication between the lubricant receiving pocket and the lubricant chamber. a 5. .In a plug valve, a valve casing having a tapering seat and rovided at the smaller end of said seat wit a lubricant chamber, a tapering plug mounted in said seat with its smaller end extending into said chamber and lubricant compressing means communicating with said lubricant chamber, said compressing means serving to compress the lubricant and cause the latter to exert pressure in the lubricant chamber against the end of the lug to force same from its seat.

, 6. In a p ug valve, a valve casing having a'tapering seat and rovided at the smaller end of-said seat wit a tapering plug mounted in said seat with its smaller end extending into said chamber, lubricant compressing means communicata lubricant chamber,

cating with the lubricant chamber, and means preventing the turning of the lug I into position to expose the lubricant c annels to liquid in the valve.

" 7. In a plug valve, a valve casing havin seat and rovided at the smaller end of said seat wit a lubricant chamber,

a plu gmounted in said with its smallencompressing means in the lubricant receiv- 1o end extending into said chamber, a radial 1n pocket.

channel formed in one end of said plug, and testimony where0 f, I aflix my signature a channel in the seating surface communiin the'presen'ce of two witnesses.

cant receiving pocketinthe lug in 0 en communication-at all times wlth the fa ial Witnesses:

" channels, the channels in the seating surface EDWARD Hosrmcrt, J r., and the lubricant chamber, and lubricant EDWARDO DEL VALLE.

6 eating with the lubricant chamber, a lubri- 'SVEN JOHAN NORDSTROM

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