SK79795A3 - Apparatus for centrifuging a hardenable liquid material and use thereof - Google Patents

Abstract

An apparatus for centrifuging a tubular layer of hardenable liquid material, comprising a rotary mould (1) and a vibrating device (24, 42) including a roller (28, 28') with its axis lying in the vertical plane passing through axis XX of the rotary mould (1). The apparatus is useful for manufacturing pipes.

Description

Apparatus for centrifugation of liquid curable material and its use

Technical field

The invention relates to a technique for centrifuging a layer of liquid curable material. In particular, the invention relates to centrifuging the curable granular material by means of a device of this type which comprises a rotary mold.

BACKGROUND OF THE INVENTION

It is known to vibrate a mold in order to move the granular material located inside the mold by means of vibrating devices (see French patent FR-A-2559407 in the name of the applicant).

In addition, French patent specification no. FR-A-2 658 102 Applicants horizontal axis electric motors whose rotor carries a balancing member enabling vibration of the mold to distribute the material contained in the mold. The vibrations are generated in a substantially vertical direction.

Both publications describe the vibration of sand in the mold on the lower horizontal surface, which allows to transmit vibration in the form of a plate, but not to form a tubular layer of material.

Soviet copyright certificates published under SU 670 447 and SU 977 184 disclose a vibration device as a source of vibration applied to a pipe suspended and rotated by the drag arms. These vibrations act along the axis of the tube and have no advantage of radial vibrations.

Radial vibrations are more efficient because they combine with the centrifugal force caused by the tube rotation and the force of the Earth's gravity.

French patent no. No. 2,462,984 in the name of the Applicant discloses an apparatus for mechanically spinning a layer of material in a rotary rotary mold held by suspension arms, the apparatus comprising means for radial vibrations positioned above the mold so as not to interfere with the horizontal horizontal displacement of the mold.

The apparatus comprises a tool capable of vibrating the rotary mold perpendicular to the X-X axis. Said tool is flexibly pivoted at one end and carries a vibratory pulley at its other end.

This technique provides considerable advantages over other techniques of centrifuging the layer of fluid material, in particular it is possible to quickly and without direct manual intervention place a restraining device, whatever the diameter of the mold, and to allow radial vibrations perpendicular to the X-X axis. It also makes it possible to arrange several vibrating members along the length of the mold and to amplify and better regulate the vibrations by combining their directions with the direction of gravity of the tube and said centrifuged material.

However, the known technique has certain limitations.

The device according to French patent no. FR-A-2 462 984 does not permit rapid mold change, since the suspension belts require the use of a sufficiently heavy rotary mold, so that it is necessary to remove the mold or to move the mold axially.

SUMMARY OF THE INVENTION

It is an object of the invention to overcome these disadvantages and to achieve various advantages, in particular in the possibility of rotating at high speed while maintaining the advantages of vertical radial vibration acting on the mold, the mold being installed or dismounted by displacement parallel thereto. Other advantages include that radial vibrations are easily controlled because it is easier to position the roller on the perimeter of the mold than on its end opening.

For this purpose, the technique of centrifuging a layer of liquid material as described above is carried out by means of a device of this type comprising a rotary rotary mold with a horizontal axis XX open at least at one end, a freely rotatable support device and an axial restraint device. a centrifugal layer on the side of the open end of the mold, the restriction device comprising, on the one hand, a profiled ring which comprises a rigid sleeve which can be slid with radial loose on said mold end except the protruding radial inner sleeve; integrally with the ring and adapted to abut the outer surface of said end, and on the other hand, a removable stand comprising abutment abutment aids and locking means. The apparatus also comprises a pulley positioned below the rotary mold, the pulley axis lying in a vertical plane containing the rotary rotary mold axis.

A further object of the invention is that it comprises:

- a rotating pulley with grooves on the outer surface,

- a vibration-inducing tool comprising at least two horizontal axis electric motors, the rotor of which bears a balancing member and which are mounted side by side below the mold symmetrically to the vertical plane in which the X-X axis of the mold lies,

- vertical movement of the pulley,

- support devices and / or rotational actuators located below the mold and non-movable, the mold being held by the clamping pivot members,

support devices and / or rotary mold rotating devices consisting of wheels and / or cylinders which are arranged along two horizontal parallel axes, the wheels being encased by a flexible damping material, in particular rubber.

BRIEF DESCRIPTION OF THE DRAWINGS

An exemplary embodiment of the invention will now be described in conjunction with the drawings.

Fig. 1 schematically illustrates, at an oblique diameter, the whole of the centrifuge assembly according to the invention during assembly of the tubular mold.

Fig. 2 shows in an oblique manner a variation of an embodiment of the spinning device according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

According to the embodiment of FIG. 1, the invention is used in an apparatus which serves to liquidly cement and centrifuge metal tubes 1, which form a mold, consisting mainly of cast iron or steel, and having a smooth open end 2a on the one hand and an open mouth on the other. 2b.

The device comprises two panels 3, 4, on each of which there are provided two support devices 5 for the tube 1. The tube clamping member 6 with respect to the supporting devices 5 is also mounted on the panels 3, 4. The removable stand 1 allows a limiting device 8 to be mounted on each open end 2a, 2b of the tube 1 to limit the spraying of liquid cement. The limiting device 8 comprises, on the one hand, a profile ring 9 which is provided with a rigid sleeve

10, which can be fitted with radial loose to said end 2a, 2b of the tube 1, except for the collar 11 projecting radially inwardly, and on the other hand an annular piece 12 of resilient material which can abut on the outer surface of end 2a.

The removable stand 7 comprises supports 7a allowing the rigid sleeve 10 to be positioned as a result of the profile ring 9 on the rigid sleeve 10. The removable stand 7 also includes locking means 7b for the rigid sleeve 10.

Each support device 5 comprises a block 13, two arms 14, fixed by one end 14a to the block 13, and comprising at the other end 14b an open bore 15 forming an axial bearing

16. The axis 16, parallel to the axis XX of the tube 1, carries a rotatable cylindrical member 17, coated on its outer rotational surface and on the outer periphery of each of its planar sides with an adhesive and damping jacket 18 formed by a flexible material tube, in particular the rubber and the filled material comprises textile fibers, the air protrusion 19 on the cylindrical distance from the axis 16. Said resilient well member housing 18 is fastened to a fastening 17. At radial over the protrusion 19.

which is formed by a very hard mixture surrounding the steel fiber hoop, sidewalls 20 formed by a combination of many soft and durable rubber particles, and joined together by a rolling tread 21 containing very fine treads and grooves to improve adhesion.

The clamping device 6 comprises a beam 22 having an axis parallel to the X-X axis and located higher in the space. The beam 22 is held by the stand 23 and supports the two arms 23a. 23b. each of which is connected to rotatable cylindrical members

24. By the same as the cylindrical members 17. The flexible pneumatic jacks 25a. 25b provide damping between the arms 23a. 23b. The hydraulic jacks 26, pivoted onto the panels 3, 4, allow the pivoting cylindrical members 24 to be lifted according to the lift of the rod of the hydraulic jacks 26, causing the arms 23a to rotate. 23b around the beam 22. The end of the sliding bar of each hydraulic jack is mounted on the lower arm 23a. 23b.

The device comprises between the two panels 3, 4 a tool which brings the tube 1 serving as a rotary mold into vibrations perpendicular to the axis X-X. Said tool 27 is positioned below the X-X axis in a vertical plane containing the X-X axis. The tool 27 consists of a roller 28, which is provided, for example, with five axial grooves 29. The roller 28 is mounted on an axis 30 carried by a U-shaped angle 31, each branch 32 facing up forming a bearing for the axis 30. The angle 31 is connected to an arm 33, pivoted on a horizontal axis 34 that is perpendicular to the axis XX. A horizontal axis 34 is located at the end of the L-shaped metal part 35, which is on the ground and forms a support for the tool 27. A pliable jack 36 is positioned between the U-shaped bracket 31 and the metal part 35. ., also supports the pulley 28 by means of the angle 31.

The flexible hoist 36 prevents the vibration induced by the pulley 28 from being transmitted to the ground, which would cause discomfort.

The device further comprises a motor 37 attached to the frame 38 and rotating the shaft 39 into rotation. The shaft 39 is attached at each end to a ball joint 40, 41. The joint 40 is connected to the motor and the joint 41 to the axis of the rotating cylindrical members 24. Thus, the motor is able to drive the rotating cylindrical members 24 into rotation.

The function of the device is as follows:

The device is provided with a metal tube or mold 1 by sliding the tube perpendicular to itself up to a line perpendicular to the X-X axis. Then the tube 1 is lowered until it is in contact with the four supporting devices 5. By the time the tube X is fed, it is already provided with a pneumatic ring mounted on the bottom of its neck 2b by compression and elastic snapping due to inflation to serve for cement separation on the side throat.

When the tube X is supported on the supporting devices 5, it is clamped on the rotating members 17 by lowering the rotating cylindrical members 24. The lowering of the rotating cylindrical members 24 is achieved by returning the rod of each hydraulic jack 26 to its housing.

The removable stand 7, located in the extension of the X-X axis, then brings the limiting device 8 into contact with the end 2a by sliding it towards the end of the tube X and along the X-X axis.

Thus, the liquid cement cannot extend beyond the end 2a. The motor 37 then rotates the rotatable cylindrical members 24 causing the tube X to rotate. Then, by means of a flexible jack 36, the roller 28 is brought into contact with the tube X which it causes to rotate, the grooves 29 of the roller 28 causing impacts on the tube X. the frequency of the vibrations is set by the number of grooves 29 on the roller 28 and the rotation speed of the tube χ. As the pulley 28 contacts the pipe X, liquid cement is poured into it. These vibrations and the rotation of the pipe X cause a homogeneous distribution of the concrete over the entire inner surface of the pipe X, the concrete taking the shape of a cylindrical pipe layer. Then the roller 28 is lowered and then the rotation stops. The removable stand 7 is returned to its rest position to allow the restraint device 8 to be withdrawn and finally a tube X is removed which is wrapped inside with concrete.

According to another embodiment, the vibration frequency is adjusted by the vibration device 42 installed in the device shown in FIG. 2. This embodiment differs from that of FIG. 1 in that it comprises said device 42 and that the roller 28 'has no grooves. Otherwise, the members of the device of FIG. 2 with the same reference numerals as used to refer to analogous members in FIG. 1

The apparatus 42 comprises two motors 43a. 43b with a horizontal axis whose rotor carries the balancing members 44a. 44b. mounted side by side below the U-shaped bracket 31. The axes of the two motors 43a. 43b are horizontal, perpendicular to the X-X axis and parallel to each other.

The apparatus also includes a drive device 45 that drives both motors 43a. 43b at the same speed in the opposite direction.

When motors are powered, they cause vibrations in the vertical direction.

In the operation of this embodiment of the device according to the invention, the motors 43a. 43b is lowered when roller 28 is contacted with pipe X and liquid cement is poured into pipe X.

When the pulley 28 * is pulled out, the power to the motors is interrupted.

Although the invention has been described in connection with certain constructions, it is not limited thereto and can be varied in various ways, for example using a plurality of devices each having a pulley, which allows the vibration to be extended on very long tubes without has departed from the scope of the invention.

Claims (11)

PATENT CLAIMS Apparatus for centrifuging a curable flowable material in a tube of the type comprising a rotary rotary mold (1) having a horizontal axis XX open at least at one end (2a, 2b), further a device (5) for supporting the mold and a device (8). ) for axially limiting the spin layer on the open end of the mold, the device comprising at least one tool (27, 42) for vibrating the rotary mold (1) perpendicular to the axis XX, the tool being resiliently pivoted at one end and supporting the vibratory pulley (28, 28 '), characterized in that the roller (28, 28') is located below the rotary mold (1), the axis of the roller being mounted in a plane perpendicular to the axis XX of the rotary mold (1), the developing tool (42) The vibration comprises at least two horizontal axis electric motors whose rotor carries a balancing member and which are mounted side by side below the mold symmetrically to the vertical plane containing the axis XX of the mold (1). Device according to claim 1, characterized in that at least one roller (28) having a substantially rotational shape carries grooves (29) on its outer surface. Device according to any one of the preceding claims, characterized in that the movement of the roller is vertical. Apparatus according to claim 1, characterized in that support means (5) secured against sliding are arranged below the mold and the mold is held by rotary clamping means. A device according to any one of the preceding claims, characterized in that a clamping member (6) is provided to bring the mold (1) into rotation. Apparatus according to any one of the preceding claims, characterized in that the support and / or rotation devices or rotary mold members (5, 6) comprise wheels and / or rollers (17, 24) mounted on horizontally parallel axes (16). Device according to claim 6, characterized in that the wheels are covered with an adhesive and damping sheath (18) of resilient material. claims The device according to any one of the foregoing comprises, on the one hand, an alignment (9), which may be radial (1), except as an annular precedent, in that the limited profile ring (10), which can (2a, 2b) 1 to 7, you 8) itself is provided with a rigid bullshaped sleeve mounted on a radially inwardly extending end of the housing, a member of resilient material integral with the sleeve and capable of abutting the outer surface of said end, and a removable stand (7) including abutment abutments the sleeve (10) as well as means for blocking the sleeve. Apparatus according to any one of the preceding claims 1 to 8 for producing concrete or cement pipes. Use of the device according to any one of the preceding claims 1 to 8, for the manufacture of pipes and for the placement of an inner coating in metal pipes. Use of a device according to any one of the preceding claims 1 to 8, for applying cementitious mortar.