US1555624A - Heating system for slashers - Google Patents

Description

Sept. 29, 1925.

' 1,555,624 7 G. H. BARRUS HEATING SYSTEM FOR SLASHERS Filed May 1922 A 2 Sheets-Sheet 1 Qwfweutoz Sept. 29, 1925. 1,555,624 Y G. H. BARRUS HEATING SYSTEM FOR SLASHERS Filed May 2 1922 2 Sheets-Sheet 2 Patented Sept. 29, 1925.

GEORGE E. BARRUS, F BR'OOKLINE, MASSACHUSETTS.

HEATING SYSTEM FOR SLASHERS.

Application filed May 24, 1922. Serial No. 563 251.

. To aZZwhom it may cmmem and useful Improvements in Heating enable others skilled in the art to which it appcrt-ains to make and use the'same.

-This invention relates to dryers oi the re volving cylinder type, and has to do particularly with slasher-s used in textile mills for applying size to the warp yarn and dryingthe treated yarn.

In the manufacture of textiles, yarns, and the like, it is common to apply a sizing to the material, before weaving, According to. one method. frequently employed a. number of strands of yarn or thread. are gathered together in a sheet, as in the warp of a fabric, and passed first through a box or vat containing the size in the form ofa warm liquid paste, and then immediately over steam heated revolving cylinders for thepurpose of thoroughly drying the size, The steam for the drying cylinders is often obtained from the exhaust of steam engines used for driving the looms and various other machinery. of the mill, and is supplied directly to the drying cylinders, the condensate being usually Withdrawn from each cylinder through a trap and passed into a common drain pipe leading to a hot well ongoing towaste, as desired. Sizing material is supplied to the vat and is maintained in the form of a, liquid paste by addingappropriate quantitiesot water or admittingtothe size vat a portion of the steam delivered through the steam supply line for the drying cylinders. V

The. heating steam admitted to the drying cylinders gradually gives up its latent heat to the cylinder walls and is condensed.

The condensate. gathers in the bottom of the cylinders, and it is accordingly desirable that some means he provided forcontinuously removing this accumulate-d water in order that the cylinders may not become filled with it. i It is common to, provide the inner cylindrical wallof each drying cylinde with longitudinally extending buckets for the purpose. of dipping up a quantity of the condensed water at every revolution of the cylinder, carrying the water thus I, Gnonsn H. BARRUS,

dipped up a part of the way around the axis of the cylinder, and discharging it at the time when the bucket approaches its uppen most position. A trough or similar member is commonly provided for receiving the water emptied from the buckets and discharging it from the cylinder. It has also been. proposed, particularly in systems Where the drying cylinders are operatedat relatively high speeds, to provide a siphon entering the cylinder through a hollow trunnion and dipping into the accumulated condensate at the lower portion of the cylinder. In such a system a continuous dischar'geot the condensate will be effected provided that a sufficient pressure difference exists between the interior of the cylinder and the container into which the condensate is discharged to maintain a flow through the discharge passage.

The above drainage systems are open to the objection that, while it is possible to secure a satisfactory removal of the condensate, air and other uncondensable gases are not removed and will consequentl accumulate within the cylinder. The air, for

instance, is of greater specific gravity than the steam which is employed as heating medium and'consequently tends to gravitate towards the periphery of the cylinder under the influence of rotation. This blanket of air forming adjacent the heat'transterring walls of the cylinder will, to a certain'extent, prevent the. heating steam from coming into direct contact with the heat transferring surfaces and will correspondingly lower the efficiency and capacity of the system, the. extent of the unfavorable influence depending on the quantity of, air present in the cylinder.

It is a principal object of this invention to provide an apparatus of the above general character in which both the accumulated air and water are continuously and efficiently removed from the drying cylinders. i I

It is a further object to provide in an apparatus of this diameter a supplementary system, in addition to the principal means employed for discharging the condensate, whichsystem is designed to remove the uncondensable gases from the drying cylinder, as well as a portion of the condensate and uncondensed steam, and to convey the removed fiuid into the size vat or other convenient place of disposal.

It is astill further object to provide an apparatus of this character which may be conveniently and inexpensively applied to existing systems. a

I have illustrated a preferred embodiment of my invention in the accompanying drawings, in which Figure 1 is a plan view of an apparatus embodying my invention, the apparatus as shown comprising two drying cylinders; Fig.2 is an elevation'al view of the apparatus shownin Fig. 1; Fig. 3 is a detail view, partially in section, showing a port-ion of my improved system; Fig. 4 is a rear elevational view showing another manner in which my invention may be applied to existing apparatus; and, Fi 5 is an elev'ational view drawn to a reduced scale show m a modified system. I

eferring to the drawings, 1 and 2 indicate the cooperating drying elements of the system, here shown as hollow metal cylinders mounted for rotation about parallel axes, and 3 indicates a size vat or box positioned adjacent the drying cylinders for containing the sizing material with which the yarn or fabric is to be treated. The material to be treated is caused to dip into the sizing material by means of suitable guides or rollers (not shown) which may be provided and is passed immediately on to the drying cylinders 1 and 2 which, when supplied with a suitable heating medium, are operated in such manner as to effect completedrying of the size during the time that the material under treatment is in contact with them. I e

The heating steam employed in the drying cylinders may belive steam from the.boilers or, as is more likely, exhaust steam from the engines and other steam utilizing apparatus commonly" found in a. textile mill. The stearnis supplied to the drying cylinders through a line 1 communicating with a common supply ma-int which extends along the length of the apparatus and supplies the various drying cylinders through individual branches 5% tapped oil from the main 5. In addition to the supply main 5 a, branch line 6 with its control valve 6 is commonly provided so that it is possible to admit steam directly from the main supply line 4 to the size'vat 8. The drying cylinders are commonly mounted for rotation on pedestals 7 or equivalent supportand are provided with hollow trunnions 8 with which the steam supply lines 7 communicate. The cylinders here shown are provided with thebucket system of drainage, the buckets. 9 emptying their contents through pipes 10 into an axially extending portion discharging through a hollow trunnion 11 provided at the end of the cylinder opposite that at which the steam is admitted. If desired, the discharge of the condensate may take place through a trap or equivalent device so that the escape of uncondensed steam is prevented. The discharge lines from the indlvidual cylinders may conveniently lead to a common drain line 12 and the joined discharges sent to a hot well or to waste.

In Fig. 3 I have illustrated in detail the construction whch I employ at the inlet end of the drying cylinder and have also shown my improved means for removing the uncondensable gases from the cylinder. The incoming steam passes through line 5" and enters the. drying cylinder through the hollow bearing 13, where it circulates about in the space within the cylinder and serves as the heating medium therefora The "hollow hearing may be of any desired construction but as shown consists essentially of the bearing sleeve 13 rotatable with the cylinder and working in the stuffing box ltwhich is fixed relative to the supporting pedestal 7.. ithin the horizontal arm of the inlet pipe 5 is a metallic pipe or sleeve 16 having a. threaded connection at 16 with the inlet pipe 5 A-second pipe '17 of outside diameter approximately equal to the inside diameter of the sleeve 16 is inserted for a considerable length within the sleeve 16 and is rotatable therein. The other end of the pipe 16 extendsino the interior of the drying cylinder and is connected to another pipe or extension 18 at right angles to the pipe 17' and supported in fixed relation with the cylinder by means of, for instance, a connection with the tie bolt 19 extending between the end walls of the drying cylinder. Upon rotation of the cylinder pipes Y17 and 18 will likewise be rotated, the connection between the pipe 17 and sleeve 16 permitting relative rotation ot the two members and at the same time affording a fluid tight joint between them.

During the operation of the apparatus the water condensate accumulates in the bottom of the cylinder and is constantly being dipped up by the buckets 9 and discharged through the hollow trunnion 11. The accumulated air within the cylinder, however, is not removed in this manner but accumulates within the cylinder- During the rotation of the cylinder the inlet end of the pipe 18 describes a circle and will pick up water condensate, steam, or air, according to the character of the medium through' preferably provided at some point along the length of the lin 21 'so that the discharge may be diverted from the size box in case it becomes desirable to do so. The condensation in the size box of whatever steam is carried out through theyline 21 serves to produce a region of pressure sutliciently reduced tomaintain a continuoiis flow. I

In Fig 4 I have illustrated a slightly different adaptation of my invention. this embodiment the small pipe line 21 which serves to conduct themixed air and water dischargefrom the respective cylinders into the size box is supplied through individual lines 20 entering 'at'the top of the out-let pipes or branches 12 which communicate with the interior of the cylinder. Revolving pipes 18 are provided within the cylin der as above described in communication with the lines 20, and the discharge of the accumulated air, and the like, is accomplished in a manner similar to'that already described, the number of pipes 18 employed being determined as desired. This embodi-' ment possesses the advantage that the outlet trunnion and associated parts as provided on existing apparatus need not be altered. In equipping the system with my invention it is merely necessary that a hole be-drilled in the top of the outlet elbow; 12 for connection with the pipe 20. Furthermore, ex

isting apparatus is usually provided with a cock for letting out the accumulated air within the cylinder at starting, this cock being commonly provided on the outlet elbow'12. In such instances, my invention may be supplied to an existing system: without altering the construction of the existing parts by merely connecting the pipe 20 to the outlet cock, whereby a passage fromthe cylinder into the size box is afiordedior the accumulated air, and the like, within the cylinder. The provision for expelling" air at starting may still' be retained by means of a cock 22 pos'itione'd at the upper end of'thebranch pipe 20.

I have illustrated and described my invention. as employed in conjunction with the bucket system of drainage, but it is understood that it may equally Well be applied to an apparatus in which other types of drainage are employed 7 In some bucket sys tems of drainage the buckets'are formed at the ends of thecylindcrgrather thanbeing positioned along the cylinder wall at the roller, as here shownyand it is evident that my invention may be conveniently applied to a system of this'type. Furthermore,I have shown'only one pipe 18 extending'into the cylinder for the purpose of removing air and a portion of the heating fluid but, if desired, a greater number of such lines may be provided and located atsuclrpositioned within the drying cylinder as desired so that a greater quantity of fluid may be discharged inthis manner. It is even possible to secure adequate discharge of the con-' densate through a number of pipes 18 so that any other system of drainage may be dispensed with, although I prefer to employ my invention in c0n unct1on with one of the common drainage systems as has been described. I

It is further evident that my invention may be applied to a system which is already in use with a. minimum amount of additional piping, the line'21 and the individual connections between this line and therespective cylinders being substantially the only new piping required. It is, therefore, obvious that a system embodyingmy invention may be provided at substantially the same.

cost as is common with existing systems, and that myinvention does not add to the complexity of the apparatus.

In attaining the object of continuously removing both the accumulated air and water from the drying cylinders, I have found that the apparatus illustrated in Fig. 5 may be advantageouslyemployed; In this modification any number of drying cylinders may be employed, but I have illustrated three such cylinders. Steam is admitted through the inlet line 4 into one end'of the cylinder 2 and serves to heat the drying surfaces of the cylinder. The condensate is discharged from'the opposite end of the cylinder into the common drain line 12 and a trap 23 is provided for thepurpose of admitting only condensate into the drain line 12, passing the uncondensed vapor on through the outlet line 24, from whence it enters the inlet end of the metal roller 2 at 25. Similarly the uncondensed vapor from the cylinder 2 is passed on into the cylinder 1 through the pipe line 24, and the condensate from each of these cylinders is discharged through a suitable trap into the commondrain line 12; The vapor line 26' is connected to thedischarge end of the cylinder 1, as shown, and serves to conduct intothe size box 3 any vapor which passes through the cylinder 1 unconde'nsed. It is readily seenthat the accumulated air within the drying cylinders will be forced along from one cylinder to the other with the'uncondensed vapor and will finally makeits way into the size boxiland 'will thus be dis charged from the system. 'Abranch line 6 leading from the steam inlet pipe 4: tothe sizeboxgis preferably provided sothat the steam may be supplied directly to the size material if desirable or necessary. Further changes and modifications, such as adapting the invention to a system comprisinga number of drying cylinders, and the like, may be made within the full scope of the appended claims,

I claim: 1. In an apparatus of the class described, the combination of a heating member, means for admitting steam to the member, means fixed relative to said member for discharging a portion of the steam anduncondensable gases from said member and a size vat associated with said member to receive a portion of the said discharge fluid.

2. In a slasher having a steam heated drying cylinder and a size vat associated there with, means for discharging condensate from said cylinder, independent means rotatable with said cylinder for withdrawing a portion of the gaseous contents of said cylinder and connections for conducting the fluid withdrawn into said size vat. a V 3. Apparatus'of the class described, com prising a movable heating element, means for supplying heating steam to said element,

' der, means for discharging condensate from said cylinder, and independent means rotatable with said cylinder for withdrawing a portion of the gaseous contents ofsaid cylinder, comprising a discharge outlet within said cylinder arranged intermediate the, periphery and axis of rotation of said cylinder.

6. Apparatus of the class described, comprising a rotatable drying cylinder, an inlet pipe for supplying heating. steam to said cylinder and means for withdrawing aportion of the gaseous contents of said cylinder, comprising a memberhaving a fluid passage. within said cylinder and rotatable therewith, the inlet opening of said passage lying outside the axis of rotation. of the cylinder, and connections leading from said fluid passage to the exteriorof the cylinder.

7. Apparatus of the classdescribed, comprising a rotatable drying cylinder, an inlet pipe for supplying heating steam to said cylinder, and means for withdrawing a portion of the gaseous contents ofsaid cylinder comprising a member having a fluid passage within said cylinder and; rotatable therewith, the inlet'opening of said passage lying outside the axis of rotation of the cylinder, a sizevat associated with said drying cylinder and connections leading from said fluid passage to the size vat, whereby the vapors issuing from said connections are condensed in the size vat to form a region of reduced pressure suflicient to maintain a flow through said fluid passage and associated connections.

prising a rotatable drying cylinder, an inlet.

pipe for supplying heating steam to said cylinder and. means for Withdrawing a portion of the contents of said cylinder, comprising a member having a fluid passage Within said cylinder and rotatable therewith, a pipe extending axially of said cylinder and communicating with said fluid passage,'a sleeve surrounding said pipe to permit rotation of the pipe therein, an external fluid passage associated withsaid sleei e for receiving the fluid issuingf-rom said'pipe,

and connections associated with said exter-,

nal passage-for conductingaway the dis charged-fluid. 1

10. Apparatus of the class described, coinprising a plurality of rotatable drying cylinders, means for supplying heating steam to said cylinders, and'means for'withdrawing a portion of the contents of said cylinders, comprising members having fluid passages Within said cylinders and rotatable therewith, pipes extending axially of said cylinders and communicating, respectively, with said fluid passages, sleeves surrounding the respective pipes, external fluid-passages associated with said sleeves for receiving. the fluid issuing from said pipes, a. size vat associated -With I said drying cylinders and a common pipe line for receiving fluid discharged from the respective drying cylinders and conducting said fluid intothe size vat. v

11. 'Apparatus of the class described, comprising a rotatable drying cylinder, an inlet pipe for supplying heating steam to said cylinder and means for Withdrawing a portion of the contents of said cylinder, comprising a member havinga fluid passage withinisaid cylinder and rotatable there with, a pipe extending axially of said cylinder and communicating with said fluid passage, av sleeve surrounding said pipe to per mit rotation of the pipe therein, an external fluid passage associated with said sleeve for receiving the fluid issuing from :said pipe saidsleeve and pipe lying within a portion of the inlet pipe.

12. Apparatus of the class described, comprising a rotatable drying cylinder, an inlet pipe for supplying heating steam to said cylinder, a discharge line leading from said cylinder, means for withdrawing a portion of the contents of said cylinder comprising a member having fluid passage within said cylinder and rotatable therewith, the inlet opening of said passage lying outside the axis of rotation of the cylinder, and external connections communicating with said fluid passage, said connections comprising pipes entering said respective discharge lines.

13. Apparatus of the class described, comprising a rotatable drying cylinder, an inlet pipe for supplying heating steam to said cylinder, a discharge line leading from said cylinder, means for Withdrawing a portion of the contents of said cylinder comprising a member having a fluid passage within said cylinder and rotatable therewith, the inlet opening of said passage lying outside the axis of rotation of the cylinder, external connections communicating with said fluid passage, said connections comprising pipes entering said respective discharge lines, and a cock associated with said external connections for permitting the passage of air upon starting of the apparatus.

In testimony whereof I aifix my signature.

GEORGE H. BARRUS.

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