US1631343A - Packing device - Google Patents

Description

June 7 1927.

A. 1.. SEGELHORST PACKING DEVICE Filed Oct. 11. 1922 2 Sheets-Sheat 1 June 7,1927. I v15631343 A. L. SEGELHORST PACKING DEVICE. Filed Oct. 11. 922 2 Sheets-Sheet 2 4 m be m r such as are employed in pumps, engines,and"

i lat ented June i7,

' AUGUST 1.. sEGnLnoR'sn-ior wnmzrlnn, en ross ng I meme QDEVICE App 1i cation filed October 11, 1922.11 Serial No. 93,85,5.-

I My invention relates to packingfdeyices devices in which fluids are handled under ;.pi 'essure.f J v My, invention is intended primarily for use with oil welllpumping equipment, but is adapted to awide range of uses, as Willbe made eyident in the followingspecification. The present form of packing boxemployed with pumps {and eng nes, provides a chamber surrounding thereciprocating pistonrod, orlpumprod, in which packing material 1s.

compressed by a gland ,which is forced against the packing by means of a screw cap,

"bolts, or resilient means. Whenit becomes necessary .to renew or make addition to the packing contained in these packing boxes it is necessary to shutdown the apparatus, and,

in the case of engines or; compressors, to re- .20. move, the'pressure frointhecylinder whereupon the-glandi's taken. out and additional or-new packing placed within the chamber.

Oil Wells from which oil is being pumped are often subjected to pressure heads due to I the accun'iulation of gas pressure within the well, Sujch 'pressure heads" occurring at a i 1 timewhen the pacldng box is open for the purposeofreneiving the packing Jresult in oil being forced up through the packingbox "and distributed, over, the derrick platform and: pumping equipment: Inthe ordinary type ofpacking box, packing is employedin the fornrof rings or in continuous lengths I wliich are coilcd'within the=packing boxa-nd then forced down into a compact form by the gland. Such packing wheniworndsdisoarded as being of no further Value. v

' It'i's an object 'ofiny inventionto. provide.

a packing device to-which the addition of:

packing-may be made Without the necessity of shutting downthe .equipmenh'and with I It isa; further object to providea packing device in which packing'is employed in com minuti-id form, and in which this comminntedj packing-is eent rely usedrup, theicompensation for wearing away thereotbeing made 'ItFis afurther'object of the invention to. provide a device of this-cli'araoter'in which the packing is fed; in coinininuted form, into" the packing chamber by means of'a' spiral" screw; onequivalent feeding imechanism'.

An important advantageof my invention e e .$w1th; such adevlce @SShQWllTlll Fig: 1.:

isthat it maybe kept inloperatingl'condition without interfering with the operation of the q iipiiintl with which it 'is employeid, f

monly employed.

dent hereinaftern,

rod 1 which is not in fi'Figsg 3 t'o inclusive, are

- :The' preferred. forinofv my invention i.-

shown 111 Fig.1 provldesia.standard forino'f 12 ot a string-of tubing by-ineans-ota collar '-ber15.; lhis packing boxl-ll is threaded at its 'i'pper end 16 and has a collar .1nembe1"- 18 screwed 'theneuponagainst agasketgl9l The .men'i'ber 18 is adapted to receive a .conoidal; "screw {20, and hasspiral-threads 22 formed. 1: therein, which are sloped oppositely to-the :i

that, toi it ne packing -n1ay ,be'; addedat i intervals'to make up forthereduction-due. v to weary also without shutting idown the;

equipment ori the necessity of 5 opening. the. 3:6 packing IbOX ELS is; necessary when itj-islder...

sired to repackthose packinghoxes now no The especialjadvantagesbf my in en en] 65: and further-objects thereot willjbe 1 na de evi-.

Referring to the drawin'gs' illustrat ye purposes o'nlyzf 1 1g, 1s a partiallysectioned view. show Fig. .3 is :a sectional.view-QshoWing the.

. preferred fornr of my device equipp d E.

that it willbe self-centering upon a polished j perfect alignnientigwith the packing box.

various forins] of m invention-n Y as i packing box 1'1, which is attached: to V the top 14, havingproirided therein ;a'pac king; chainthrea'ds: 23' 'Oi'. :the {screw 20.. A f hub 25 1312-; tends upwardly from the; screw 201and has a -btbblllli8df qbore 26 ith'rough; which the, a

I polished r0d -27 of the pumping equipmentg? V out. the necessityof opening the packing box. 5.:

extends and reciprocates. 1 To the upper end. i

operating; arms 29.- extend; 5 A bowl 5 31,;

As hereinbefor'e Y stated Ip'acking I has? "utilized in the; form of ringsor: continuous i :lengths'vThe use'of comminuted.packingal ibelieve tobe entirely new'andorlginal wrthw ine,: ,and especially 7 the use of such packing-l coinminu-ted packingmay be of metallic,

Zingmy invention (employed as a .;mea'nsffor {packing "around the polished 130d of an oil Views showing I wall of the member 42, and-engages a blind opening 57 in the outer iac'e of the cooperator of rubber and fabric composition, this packing being provided in chunks ofa suitable size to pass through the openings iii-B as shown at 36. The comminuted packingbe ing placed in the bowl. 31 flsshown, the Clliilfl:

"ber having been previously filled therewith, the screw is rotated in a rightghand direction by use of the bars 29. The com- :minuted packing drops through the o enings 33 and is engaged by the spiral threads of the s'crewflt), and is thereupon carried downward and forcedlintothe chamber 15.

The use of screws for feeding materials is recognized as being old, but the arrangement shownv mF 1g. 1 provides a new and useful combination whereby a packing box may be supplied with packing material as the packing therein is worn, and further provides a ineans'whereby unlimited compression may be placed upon the pacl'zi-ng within thepacking chamber to care for the pressures'which must be workeda'gainst.- i

This-preferred fori'i' otmy invention may be'quicklyfinstalled with-any of the comm o'n typesof packing-boxes Thedisposal of thescrewthereof,concentrically upon the polished rod 27, provides a means whereby thepacking materialmay be fed into the packing chamber in an axial direction and results attziiriedfequalto those obtained by the'use of a follower. By the axial feeding in of the comminuted packing an equal dis tribution of pressure 'isprovided throughout the packing chamber. p T

'In F 31 show an oil well packing head 40 provided with flanges 4L1. Upon I the member 40 a castin'g 42 may be b o'lted 'by means'of studs 43; The casting 42 provides bowl- 14 and abore 45 having a curved upper face 46.: A circular openmg 47' ex-' tendsthrough the web 48 which separates the bowl tt fromthe bore &5, through which pointed screw 56 is threaded through the inig m ember 53. The member 58 may b ed at rally within the bor -45, as to compensate for a mis li e polished rod 58 theopening 4L7 through-the web 48 being also of greater diameterthan the hub'49.f Circular openings 581 arepro vided-in the web 48 through which the comminuted packing 59 placed in'th-e bowl-4A, may pass into the spaces between the threads of the screw 50, so that it may be fedas desired into the packing chamber 60 pro- .tight] vided by the packingliead 4.0. In this form I of my device I show a capstan ring 61, en-

gageable by alever 62, bywhichdtheisc'rew 50 may be rotated upon the polished rod 58' to accomplish the desiredfeeding of the com. minuted packing. 5

In; various types of compressors and in steam engines it is necessary to employ stuffing boxes upon the-piston rods inorder to prevent the leakage of fluids from the cylinders. In Fig. l '1' show'my invention adapted to'such'use, in which figurefare illustrated a casting having a plate 66 which may serve as the cylinder head or'the device upon which it'is being used,and a pack-mg chamber (57 having a cap 68 thread- X ed upon the end thereof. Extend ng. per- 1 bular shatt 69 in which a feed 'screwTO, adapted to'be rotatedby a handle 1, operates; The comminuted"material is supplied pendicularly irom the chamber 67 is a tu- 5 in a bowl 73 havin a cover 74' and a. spring actuated plunger 7:) which bearsagainst-th'e packing 77 and forces 1t 1nto"the-tubular shaft 69 so that it may be fed into the packmg chamber 67 as the feed screw is rota-ted by turning the handle 71. Babbitt, or hear ng metal, end plates 79' are provided in the ends of the packing 'chamber; for centralizing the piston 'rod 80 within the packing device. -My invention is ofiaartiCular utility in the use shown'in'Fig. l, as itpro vides a means for keeping the'packing-ab- 'solutely tight, without the iiecessity'of'openng the packing chamber for the purposeot adding. new packing material. This has a decided value in devices which are employed for-handling acids, as the packing boxes-may be packed without exposing the workman to the acid or acidrtumes, as occurs when the ordinary type of packing boxes used with such equipment must be repacked, whichis comparatively often ow ng to the deteriorat ing action of theacids upon the packing. ma-

terials It will be perceived that my invention providesa meansfor continuously sup- =plying the paching-material to such achainber, thus replacing the deteriorated packing and keeping Under certain conditions it" is advisable to provide a continuous automaticfeeding:- of packing material into a packingichamber. In 'Figs. 5 and 6 I show my'invention adaptedwto this use;v Upon a packing head 85 a cap. 86- is shown-threaded-at 87 and the packing "box absolutely has attach-ed'thereto a member 88 in which a feed screw89 operates. 'This t'ee d screw" 18 supplied with the comminuted packing by afscrew' plug 94through which the shaft 95 of the: screw extendsoutward beyond the face ofthe plug 94. Loosely mounted upon the shaft isa' vertical. arm 96 upon Whichf'a 90 from a receptacle 92 provided in thec'over i 93. The screw 89is held'in the member 88 pawl 97 is mounted by means of a screw 98, and rigidly secured to the end of the shaft 95 is a ratchet wheel 99 which is held upon the shaft by a nut 100. The upper end of the arm 96 is provided with a fork 103 which engages the polished rod 104 so that the deflection of the polished rod as it reciprocates will causev a slight backward and forward reciprocation of the arm 96 as indicated by the dotted lines 105 in Fig. 6. Thus, it will be perceived that as the polished rod 104 is reciprocated, the arm 96 will be provided with a slight reciprocating rotary act-ion which will cause the pawl 97 to consecutively engage the teeth, of the ratchet 99, and thereupon rotate the screw .89, which in turn continuously feeds the wear of the polished rod as it passes through the cap 86. The friction plate 109 may be held in position in the top of the cap 86 by a small screw 110. A'small cup 112 is threaded upon the top of the cap 86 into which any oil that may be forced through the packing member may collect, and a drip spout, in the form of a pipe 113, is provided whereby the oil may drain from the cup 112 into a suitable receptacle, not shown.

In the horizontal sectional View shown in Fig. 7 I show the manner in which a feed screw 150 may be adaptedto feed a continuous strip of packing material 160 tangentially into a packing chamber 151 provided by a casting 152. It is advantageous to feed the strip of material into a packing chamber in this manner, as the direct pressure of the entering of the material is not then exerted directly against the shaft 153 but is added to the bulk of the material Within the packing chamber 151 so that the compression is exerted upon the shaft 153 from all sides.

From the foregoing descriptive matter, it

will be understood that the essential feature of the invention resides in the idea, and development thereof, of feeding packing material into a substantially closed chama her as the material contained therein is worn away by friction.

I claim as my invention:

1. In a packing device of the class de- I scribed, the combination of: a body providing a packing chamber directly surrounding the shaft to be packed; walls providing a receptacle for' holding a packing material; and rotatable means comprising a spiral member engaging said packing material and disposed between said packing chamber and said receptacle for forcing said packing material into said packing chamber.

2. In a packing device of the class described, the combination of: a body form- I ing a packing chamber; a shaft extending through said chamber; walls forming a receptacle for containing a packing material; and rotatable means therebetween, and comprising a spiral member which engages said packlng for manually forcing said packing against said shaft.

3. In a packing deviceof the class de-' scribed the combination of: a shaft; a body forming a packing chamber around said shaft; walls forming a receptacle around said shaft for holding a supply of packing material; and manually operable means comprising a spiral member engaging packing disposed around said shaft for forcing said packing into said packing chamber. 6

4. In a packing device of the class de-.

AUGUST L. SEGELHORST.

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