US2113096A

US2113096A - Device for drying, compacting, gauging, and polishing pipes and casings of fibro-cement and similar material

Info

Publication number: US2113096A
Application number: US168068A
Authority: US
Inventors: Rocca Enrico
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-11-29
Filing date: 1937-10-08
Publication date: 1938-04-05
Anticipated expiration: 1955-04-05

Description

2,113,096 DEVICE FOR DRYING, COMPACTING, GAUGING, AND POLISHING PIPES April 5, 1938. E. ROCCA AND CASINGS OF FIBRO-CEMENT AND SIMILAR MATERIAL Filed Oct. 1957 8, 3 Sheets-Sheet l actor:

ENRICO Room MN m o a 0 0 mm u n 4 .Qh QM mm o o o 0 1 MN v mm, 0 RN NN 3 Q (NN \g .O Y Win f O M. Q9 0 r N RN Ew l o 0 QH O u an m Q 0 H M. MN NN a o v Q N Aprll 5, 1938. E ROCCA 2,113,096

DEVICE FOR DRYING, GOMFACTING, GAUGING, AND POLISHING PIPES AND CASINGS OF FIBRO-CEMENT AND SIMILAR MATERIAL Filed Oct. 8, 1957 3 Sheets-Sheet 2 ENRlco R0 GOA April 5, 1938. 2,113,096

i ed Oct. 8,

E. ROCCA DEVICE FOR DRYING, COMPACTING, GAUGING, AND POLISHING PIPES AND CASINGS OF F RO-CEMENT AND SIMILAR MATERIAL 1957 3 Sheets-Sheet 3 i\--7 ,Iwent'vr; Z 5 xx ENRICO RoccA J 'ltented Apr. 5, 1938 UNITED STATES PATENT OFFICE RIAL Application October 8,

Enrico Rocca, Dalmine, Italy 1937, Serial No. 168,068

In Italy November 29, 1933 4 Claims.

This application is a continuation-in-part of my co-pending application, Serial No. 753,070,

filed November 14, 1934,

The present invention relates to the finishing of tubular asbestos-cement products.

It is already known that products of asbestoscement (pipes, casings and similar articles) can be made very compact and waterproof by means 'of high compression, while still in the paste-like state, and that the compactness and waterproof property are highly important factors of the technological qualities of said pipes. The application of such high compression on the pastelike products is a very delicate operation and up to the present time no perfect-pressing method of possible industrial application had yet been found.

An object of this invention is to provide a method and apparatus for simultaneously compressing and polishing asbestos-cement pipes of any diameter.

Another object of this invention is to provide a group of rollers, comprising a pressing and polishing roller, and two carrying or centering rollers, means for rotating the rollers, and means to press the rollers against the pipe to be pressed.

With these and other important objects-in view, which may be incident to my improvements, the invention resides in the parts and combinations to be hereinafter set forth and claimed, with the understanding that the several necessary elements comprising my invention may be varied in construction, proportions and ar-- rangement, without departing from the spirit and scope of the appended claims.

The present invention deals with a process and apparatus for simultaneously compressing and polishing asbestos-cement'pipes of any diameter. During this compression, the separation of the manufactured pipe from the metal tube, which has been employed as a core, is also obtained.

According to the present invention, means are provided, including at least one group of rollers, for receiving an asbestos-cement pipe, made on any type of machine, and imparting rotary and axial feeding motions thereto. Each group of rollers comprises a pressing and polishing roller and two carrying or centering rollers. Each roller is mounted in a fork for rotary movement about its axis and the fork of each roller is pivotally mounted to its support. The carrying or centering rollers are inclined in a direction opposite that of the pressing roller so as to. allow axial feeding of the pipe.

The pressing and polishing roller is thrust forward against the pipe to be pressed by hydraulic means, which offers a wide range of adjustment.

It is also contemplated to separately adjust each roller group, so that, for instance, a low pressure in the first roller group increases by degrees in 5 the successive groups (2nd, 3rd, etc.) and reaches its highest value in the last group.

Thus, it is possible to force the surplus water gradually from the asbestos-cement pipe which slowly acquires a higher degree of compactness.

In the drawings:

Figure 1 is an end view, partly in section, of an apparatus embodying the present invention.

Fig. 2 is a fragmentary plan view of the apparatus,'illustrating three sets of rollers.

- Fig. 3 is a detailed plan view of one of the rollers.

Fig. 4 is a view similar to Fig. 2 of .a single group of rollers, illustrating the inclination imparted to the rollers.

Fig. 5 is an axial sectional view taken on line 5-5 of Fig. 6, illustrating a power driven roller according to the present invention.

Figs. 6 is a sectional view taken on line 6-4 of Fig.

Fig. 7 is a sectional view taken on line 'I-|- of Fig. 5.

In the device, according to the invention as shown in the annexed drawings, the asbestoscement pipe I resting on the metal spindle 2 is subjected to the action of rollers 3 which compress and polish it, while the counterpressing supporting rollers 4 and 5 keep it centered. Water pressed from the pipe I is collected-in trough 52 and is discharged through drain 53.

Each roller 3 is mounted 'for rotation about its axis in a fork 6 which is pivotally mounted in the clevis I for movement about a pin 8. Clevis I is carried by a support 8 which, as shown in Fig. 1, is mounted for axial reciprocating moye- *ment in a guide bearing III which, in turn, is supported by the machine frame ll The pivotal mounting of forks G in clevises l insures perfect contact and uniform pressure of the rollers on the surface of pipe I.

Rollers l and 5 are each mounted similarly to rollers 3 in a fork l2 which is pivotally carried by a clevis I! for pivotal movement about a pin ll. Each clevis I3 is carried by a. support I! mounted on the machine frame. The rollers l and 5 of each group are adapted to move simultaneously toward and away from the pipe I and for this purpose the supports II are pivoted by pins I8 and I6 adjacent the clevises II to the .ends of substantially T-shaped quadrant levers u 23' and T-shaped quadrant levers I1 and H are such that the rollers 4 and 5 will move in substantially straight lines.

Links 22 and 22' connect the free ends of T- shaped quadrant levers l1 and I1 to a yoke 23 having a supporting stem 24 slidably mounted in a socket 25 in the machine frame.

A hydraulic press 25, comprising a cylinder 21 fed through a valve-controlled conduit 23 and a piston 29, serves for pressing rollers 3 against the pipe I. For this purpose the piston rod 33 is connected to one end of .a bell-crank 3i, the other end being connected to support 3.

A similar hydraulic press 25' has its piston rod 33' connected to one end of bell-crank 3|, the other end of which is connected by link 32 to yoke 23 for pressing rollers 4 and 5 against pipe I.

To maintain simultaneous action between all rollers of a group, bell-cranks 3| and 31 are connected by a linkage including

resilient links

33 and 33, bell-cranks 34 and 35, and link 35.

With the above-described structure, the synchronous action of the pressure of the three rollers in a radial direction is always assured, regardless of the diameter of the pipe i.

In Fig. 4, the inclination that the rollers 3 and counterpressing rollers 4 and 5 take while working may be clearly seen; this inclination produces the helical feeding motion of the pipe.

The drive of the pressing roller can be effected in'various manners, and it is possible that all of the groups may be power driven or only one of the groups. If the machine has only a small number of rollers, then all may be power driven to prevent great tangential forces which could break the' tube. Ifa large number of groups of rollers is provided, only the first and the last groups, or only the first group alone, will be power driven. In every case, the rollers can be made in the manner represented in Figs. 5, 6 and 7.

As shown, the rollers 3 are divided-into two parts: the internal 31, which is fixed and has an elliptical section, and the external 33, which is rotatable and has a circular section. A plurality member 31 and the cylindrical roller 33 and by engaging the vanes causes the cylindrical shell 33 to rotate in the direction of the arrow (Figs. 6 and '7 The fluid is exhausted from spaces 41 and 43 into the exhaust compartment through

ports

43 and 53 and thence through the outlet 5|. The operation of sliding vane motors of this type is well known and discussion of the theory thereof is not believed necessary.

The free ends of While the preferred embodiment of the invention has been shown and described, it is to be understood that I do not confine myself to the precise details herein set forth by way of illustration, as it is apparent that many changes and variations may be made therein by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the appended claims.

I claim:-

1. An apparatus for drying, compacting, gauging and polishing flbro-cement pipes and similar bodies, comprising at least one group of rollers, said group consisting of a pressing roller having a specular surface, means for pressing said roller in a radial direction against the surface of the pipe, a pair of counterpressing rollers circumferentially spaced around the pipe for supporting the pipe against the pressing roller, and means for effecting an axial displacement of the pipe upon rotation thereof.

2. An apparatus for drying, compacting, gauging and polishing fibre-cement pipes and similar bodies, comprising a plurality of I groups of rollers axially spaced along the length of the pipe, each of said axially spaced groups consisting of a pressing roller having a specular surface, means for pressing said roller in a radial direction against the surface of the pipe, a pair of counterpressing rollers circumferentially spaced around the pipe for supporting the pipe against the pressing roller, and means for effecting an axial displacement of the pipe upon rotation thereof, the pressure exerted on the pipe by the rollers increasing progressively in each succeeding group.

3. An apparatus for drying, compacting, gauging and polishing fibro-cement pipes and similar bodies, comprising at least one group of rollers, said group consisting of a pressing roller having a specular surface, means for pressing said roller in a radial direction against the surface of the pipe, a pair of counterpressing rollers circumferentially spaced around the pipe for supporting the pipe against the pressing roller, means for effecting an axial displacement of the pipe upon rotation thereof, and stationary means associated with said group of rollers to collect and carry ofif water from the pipe.

4. An apparatus for drying, compacting, gauging and polishing fibro-cement pipes and similar bodies, comprising a plurality of groups of rollers axially spaced along the length of the pipe, each of said axially spaced groups consisting of a pressing roller having a specular surface, means for pressing said roller in a radial direction against the surface of the pipe, a pair of counterpressing rollers circumferentially spaced around the pipe for supporting the pipe against the pressing roller, means for effecting an axial displacement of the pipe upon rotation thereof, the pressure exerted on the pipe by the rollers increasing progressively along the length of the pipe, and stationary means associated with said group of rollers to collect and carry off water from the pipe.

' ENRICO ROCCA.