US1876760A - Pipe wrapping machine - Google Patents

Description

Sept 13, 193.2 s. Rosi-:NER

PIPE WRPPING MACHINE Filed lay 21, 1928 5 Sheets-Sheet 2 EZHND ROSE/YE? m j@ H/S ATTQENEK Sept. 13, 1932. L. s. Rosi-:NER

PIPE WRAPPING MACH'INE Filed May 21, 1928 S'Sheets-Sheet 3 m m Y e v. m E w sf e* vp o NN w /H L u s H SM1 NQ n u: #Q i.: n HHM MS Patented Sept. 13, 1932 UNITED STATES PATENT OFFICEv LELAND S. ROSEN ER, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE PARAFFINE l COMPANIES, INC., OF SAN FRANCISCO,

WARE

CALIFORNIA, A CORPORATION OF DELA- PIPE WRAPPING- MACHINE Application led May 21,

My invention relates to machines for winding strips of covering material about pipes or conduits before they are laid, and particularly to machines in which thestrips are covered with hot iluid as the wrapping takes place.

An object of this invention is to provide a machine which will wrap pipe of large size and at high s eed.

Another object of this invention is to provide a pipe wrapping machine occupying a floor space but little longer, than the pipe to be wrapped.

Another object of this invention is to provide a machine which will produce a smooth and uniform wrapping with a minimum quantity of wrapping material.

My invention possesses other objects and valuable features, some of which will be set forth in the following description of my invention which is illustrated in the drawings forming part of the specification. It is to be understood that I do not limit myself to the showing` made by the said description and drawings, as l may adopt varying forms of my invention within the scope of the claims.

Referring to the drawings: A

Fig. l is a plan and Fig. 2 is a front clevation of a pipe wrapping machine embodying' the invention. Certain parts are omitted in Figure 2 for the sake of clarity.

Fig. 3 is an end view on a somewhat larger scale, partly in elevation and partly in section. The plane of section is indicated by the line 3 3 of Fig. l.

Broadly considered the invention coniprises means for supporting and rotating the pipe to be wrapped. Parallel to the pipel is a track, on which runs a carriage supporting a tank adapted to hold a saturant liuid. The tank is adjustable about a vertical axis on the carriage and carries with it means for supporting a roll of wrapping material and feeding it through the tank and onto the pipe. Common driving means rotates the pipe and moves the carriage longitudinally thereof, and the speed ratio of these two motions is nicely adjustable to conform with the width 1928. Serial No. 279,426.

of the wrapping material and the angular adjustment of the roll-holding means.

In more detailed terms, a preferred ein-- bodiment of this invention comprises a frame, the foundation of which is the transverse I-beams 6. Supported upon one end of these beams are other I-beams 7, shorter and with wider webs than the first, and parallel thereto. These in turn support a pair of longitudinal beams 8 which form the bed of the machine Transverse to the bed are secured two pairs of brackets. The first pair or" brackets, 1l and l2, at the head or driving end of the machine support bearings 13 and la in which the spindle 16 is journaled. Gear wheels 17, 18 and 19 are fixed for rotation with the spindle, as is a large conical center 21 for driving the pipe to be wrapped.

A jack-shaft 22 is journaled in the bearings 23 carried by the brackets 11 and l2. Splined to the shaft is a spool gear 24 which may be slid along the shaft to mesh with either of the three spindle gears. The spool gear is held in mesh by the spring latch 26, which seats .in recesses in the shaft, in accordance with well known practice. The large gear 27 is keyed to the end ofthe jack-sha:tt.

Meshing with the gear 27 to drive the jat-.kshaft is a pinion 3l, keyed to the drive shaft 32 which is j ournaled below the jack-shaft in the bearings 33. The drive shaft carries two sprockets. The sprocket 34 .is fixed for rotation with the shattand drives the tank can riage. vThe sprocket 86 turns on the shaft, with which it may be operatively connected by the clutch 37. rfhe sprocket 'taires its drive from a chain 88 which gears to the prime mover, conveniently a gas engine 39 mounted on extensions of two et the I-beams 6.

The shifter-yoke 42 for operating the clutch 37' is mounted on a stub shaft i3 se cured to the Lbeam 8, and is moved by means of a beveled sector la meshing with a pinion i6 on the end of a longitudinal shaft 47. The shaft l? is supported in bearings 48 secured to the I-beam 8. Levers 49 are lined to the shaft at convenient operating,` points.

At the other ot' the Lbeams 8, the tail i Sii stock 61, comprising the second pair of brackets above mentioned, is mounted on rollers 62 which engage the fianges of the beams. The dogs 63 clamp the tail-stock to the flanges at any desired point. Movable in the tail-stock co-axially with the head spindle is a threaded tail spindle 64, splined to prevent rotation and adjustable by means of a long nut 66 turned by a hand wheel 67 A conical center 68 carried by the tail spindle turns on a thrust bearing 69.

Parallel with the I-beams 8 another pair of I-beams 71 resting on the foundation beams 6 carry the rails 72 on which the carriage travels. The carriage comprises a. rectangular framework built up of channels 76. The longitudinal members of the framework are double, the channels being set back to back and spaced to encompass the Hanged wheels 77 which are journaled on the pins 78. The framework carries a platform 79 on which are mounted the saturating tank 81 and the burner equipment for heating it.

The tank is rectangular' and rests upon a second channel frame 82. This frame carries a short vertical shaft 83 engaging a pivot bearing 81 mounted centrally of the platform l 79. Rbllers 86 turning on the pins 87 carry the greater part of the weight on the frame. The frame carries a gear sector 88 which meshes with a pinion 89 turned by a hand Wheel 91 for adjusting the angular setting of the tank on the platform. Suitable clamping means, such as the clamp-screw working through the arcuate slot 93 in the gear sector holds the tank in its adjusted position.

Oil torches 96 are supplied from a fuel tank 97 mounted on the platform 79. These torches play into U-shaped tire tubes 98 opening through the side of the tank, and keep the saturant material hot and fluid.

Mounted on the outer end of the tank is a pair of brackets 101 carrying open bearings 102 and 103 for shafts 104 support-ing the rolls of wrapping material 106.. Between the rolls and the. tank the brackets carrying bearingsl in which are journaied a ten-- sioning device. This comprises a pair of rollers 108 and 109 mounted between and at each end of a pair of short levers 110. The two short shafts 111 on which the tension pivots extend outwardly from the center of these levers through the bearings 107, and on the end of one of the shafts is secured aY lever arm 112 carrying a movable weight 113 by means' of which the tension may be adjusted.

The wrapping material is passed from its roll under the roller 108 and over the roller 50 109. Tension on the strip of material forces roller 108 down and roller 109 'up` thereby raising the weight 113. This straightens the path of the strip and decreases the tension, the forcesrapidly reaching an equilibrium 55 value where the lfension remains constant.

The device prevents sudden jerks on the heavy roll which might break the strip.

From the tension device the strip is passed over a roller 116 j ournaled in the bearings 117 and extending across the tank. The strip next passes down into the Huid in the tank and under a heavy roller 118. The roller 118 is journaled between a pair of lever arms 119 pivoted within the sides of the tank. The Weight of the roller and the tension on the strip both serve to keep these levers normally hanging in a Vertical position, but each lever is provided with eyed lugs 121 which may be engaged by a hook and the lever drawn up to the position shown by the dotted lines for threading the wrapping strip beneath it.

The strip next passes up out of the tank and over a roller 122 journaled in a pair of brackets 123 slidably mounted on upright-s 124 secured to each side of the tank. A screw 126 turned by a hand wheel 127 is used to adjust the height of each bracket on the uprights, to feed the wrapping strip horizontally onto Whatever diameter pipe is being wrapped.

h'ieans are provided for moving the carriage along the track at a speed having a predetermined ratio to the rotational speed of the pipe. A. chain 131 is attached by shackles 132 tc each end of the carriage. At the tail end of the machine the chain passes over an idle sprocket 133 journaled in the brackets 134 mouiited on the -beam 6. At thc head end it passes over a driving sprocket 136. i

The sprocket 136 is 'driven from the sprocket 34 on the drive shaft through suitn able speed-change and reversing mechanism which are mounted on a framework 1157 at the head end of the I-beam 71. A chain 138 passes from the sprocket 3/1 over a. sprocket 139 driving the speed-change gear 140. This is preferably a Reeves drive, but it may be any speed changing device in which the speed ratio is adjustable by continuous grada tions, The driven shaft 141 of the Reeves drive carries a sprocket 142 and a gear 143.

ne sprocket drives a chain 1411 and thence a larger sprocket 146 turning on a shaft 147 journaled in bearings 148 on the framework 137. The gear 143 meshes with a gear 149 on a short countershaft 151 also journaled on the frame 137. A sprocket 152 on the countershaft drives a similar sized sprocket 153 turniing on the shaft 1117.

l Either of the sprockets 146 or 153 may be fixed for rotation with the shaft- 147 by means of the double clutches 154 and 155 operated by the shift lever 156. rlhe shift lever is provided with a sector 157 and latch 158 to prevent accidental throwing of the clutches. The shaft may thus be rotated either forwardly, or backwardly at a higher speed, by moving the lever 156 te enga-,ge one or the other of the clutches. On the end of the shaft 147 is keyed a bevel pinion 161 which mesheswit-h agcar 162 on the transverse shaft 163, to which the sprocket 136,

for driving the carriage, is keyed.

Between the tracks 72 on which the car` riage runs, and the wrapping machine bed, is a platform or runway 166 supported on brackets 167. Thefrunway is useful to the operator watching the laying of the wrapping and especially in starting the wrapping of the pipe.

The method of operation of the machine may easily be appreciated. The pipe is placed between the centers and the tail spindle advanced to hold the pipe firmly and give a positive drive through its friction with the head center'. The proper speed for the size of pipe is selected by means of the sliding spool gear 24. The wrapping is started with the carriage at the head end of the machine, and the proper ratio of carriage speed to rotational speed is set. It is here that lthe advantage of a continuous gradation of speed change becomes apparent, for.- there must usually be a slight lapping of the wrapping material, and if the carriage' speed be too great the material will not lap while too slow a carriage speed involves a large waste of material. A further advantage of this drive is that the speed ratio may be adjusted while the machine-is in operation to compensate for irregularities in the winding strip or for inaccuracy in calculating the required degree of lap.

The angle of the tank is adjusted so that the wrapping strip leaves the feed rollers to cling to the pipe tightly and without wrinkles.

Clutch 154 is then engaged to move the carriage forward, and the operator then' moves lever 49 to start the winding process. When it is complete the wrapping strip is cut, the lever 156 is thrown to return the carriage to the head end of the machine and the operation is repeated. The adjustments of speed and tank angle of course remain the same as long as the size of pipe and width of wrapping strip remain constant.

The machine may be used for pipes of large or small diameter, since the carriage is at one side of the bed of the machine and is, therefore, outl of the way when the largest size of pipe the machine will swing is being handled.

I claim 1. A pipe wrapping machine comprising means for supporting and rotating a pipe, a track parallel to the rotational axis of said pipe, a carriage movable along said track, a tank adapted to hold a fluid and movable about a vertical axis on said carriage, a gear sector fixed to said tank, a pinion meshing with said sector, means for rotating said pinion to adjust the angular position of the my hand.

LELAND S. ROSENER.

Lca

i 1CD

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