Apparatus for applying a coating to the surface of cylindrical articles

Abstract

The invention relates to apparatuses for treating the outside surface of cylindrical articles, and can be used for applying liquid substances to the surface of such articles. The apparatus for applying a coating additionally comprises a roller rotation actuator, a carriage and at least two arcuate brackets movably joined to the carriage. The rollers are designed to be capable of bending easily in any direction and have high torsional stiffness and low bending stiffness. One end of each roller is rotatably fastened to the carriage and is connected by a spindle to the rotation actuator. The other end of each roller is rotatably fastened to the free end of an arcuate bracket. The brackets are mounted on the carriage with a distance therebetween sufficient to accommodate the cross-section of the article to be treated. The brackets are capable of rotating towards one another in a mutually perpendicular manner and of enclosing the cross-section of the cylindrical article in a semi-circular manner. The technical result of the invention is increased efficiency, a simplified design, reduced dimensions and greater functional capabilities.

Claims

1. An apparatus for coating the surface of cylindrical articles comprising: a detachable coating member comprising at least two rotating rollers which can congruently annularly encompass the periphery of a cylindrical article to be treated; a mechanism for detaching the coating member; a feeding system of the coating material into coating member, wherein each of the rollers are executed with an inner cavity and its walls are permeable to the coating material, providing delivery of the latter from the inner cavity of the roller onto the treated surface, and has a channel for feeding coating material into the inner cavity, in that it further comprises a rollers rotation actuator; a carriage and at least two arcuate brackets movably joined to the carriage; the rollers are designed to be capable of bending easily in any direction and to have high torsional stiffness and low bending stiffness, where one end of each roller is rotatably fastened to the carriage and is connected by a spindle to the rotary actuator, the other end of each roller is rotatably fastened to a free end of an arcuate bracket; the brackets are mounted on the carriage with a distance therebetween sufficient to accommodate the cross-section of the article to be treated and are capable of rotating towards one another in a mutually perpendicular manner and capable of enclosing the cross-section of the cylindrical article in a semi-circular manner.

2. The apparatus according to claim 1, wherein in an open state of the coating member arcs of the brackets oriented vertically along the cylindrical article, where the convex of pairs of brackets face each other; when in a closed state they are aligned horizontally across the cylindrical article, convex upwards.

3. The apparatus according to claim 1, wherein rotary actuator is reversible; it contains thermal or electrical or pneumatic or hydraulic motor and provides mutually opposite direction of rotation of the rollers, where the rollers are oppositely placed about the transverse axis of the cylindrical article.

4. The apparatus according to claim 1, wherein the mechanism for detaching includes a system of hinged-lever traction connecting brackets' ends movably coupled to the carriage and ensuring their consistent rotation around the vertical and horizontal axes, connecting the coating member in an open and closed state, and remote control of traction system.

5. The apparatus according to claim 4, wherein remote control of traction system can be used mechanical and/or hydraulic and/or pneumatic and/or electrical devices.

6. The apparatus according to claim 5, wherein a wire is used as a mechanical device for remote control of traction system.

7. The apparatus according to claim 5, wherein a hydraulic cylinder is used as a hydraulic device for remote control of traction system.

8. The apparatus according to claim 5, wherein a pneumatic cylinder is used as a pneumatic device for remote control of traction system.

9. The apparatus according to claim 5, wherein an electromagnetic thrust is used as an electrical device for remote control of traction system.

10. The apparatus according to claim 1, wherein the rollers are cores having a fleecy and/or porous coating, made of resilient material and/or wires wound in rows.

11. The apparatus according to claim 1, wherein apparatus further comprise a handle attached to the carriage.

12. The apparatus according to claim 1, wherein apparatus further comprise a telescopic rod pivotally attached to the carriage.

13. The apparatus according to claim 1, wherein the brackets are mounted on the carriage with the possibility to change the distance therebetween depending on the diameter of the cylindrical articles being treated.

14. The apparatus according to claim 1, wherein the feeding system of the coating material into coating member contains actuators that provide the supply of the coating material under pressure into the coating member.

15. The apparatus according to claim 1, wherein the coating member includes three rotating rollers being able congruently annularly encompass the periphery of a cylindrical article to be treated, and three arc-shaped brackets are movably joined with the carriage, where the enfold of the cylindrical article is performed with two rollers on one side and with one roller on the other side.

16. The apparatus according to claim 1, wherein in an open position of the coating member arcs of the brackets are oriented vertically along the cylindrical article, convex toward each other and when in a closed position oriented horizontally across the cylindrical article, convex upwards; rotary actuator is reversible, contains thermal or electric or pneumatic or hydraulic motor and provides mutually opposite direction of rotation of the rollers, oppositely placed about the transverse axis of the cylindrical article; the mechanism for detaching including a system of hinged-lever traction, connecting the brackets' ends movably coupled to the carriage, and ensuring their consistent rotation around the vertical and horizontal axes, connecting the coating member in open and closed positions and remote control of traction system; the rollers are cores having a fleecy and/or porous coating, made of resilient material and/or wires wound in rows; apparatus further comprises a handle attached to the carriage and/or a telescopic rod pivotally attached to the carriage; said brackets are mounted on the carriage with the possibility of varying the distance therebetween depending on the diameter of the treated cylindrical article; the feeding system of the coating material has actuators which provide supply of the coating material under pressure into coating member.

17. The apparatus according to claim 16, wherein the coating member including three rotating rollers being able congruently annularly encompass the periphery of a cylindrical article to be treated, and the three arc-shaped brackets movably joined to the carriage, where the enfold of the cylindrical article is performed with two rollers on one side and with one roller on the other side.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present invention is illustrated by the drawings shown in FIGS. 1, 2, 3.

(2) FIG. 1 shows a drawing of an apparatus for applying a coating to the surface of cylindrical articles in the open (non-operating) state.

(3) FIG. 2 shows a drawing of an apparatus for applying a coating to the surface of cylindrical articles in the closed (operating) state.

(4) FIG. 3 shows a drawing of a roller of the coating member of apparatus for applying a coating to the surface of cylindrical articles.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) In a preferred embodiment apparatus for applying a coating to the surface of cylindrical articles comprises: detachable coating member comprising at least two rotatable rollers 1, 2; a roller rotation actuator 3; carriage 4 and at least two arcuate brackets 5, 6, movably joined to the carriage 4; telescoping pole 7, is pivotally attached to the carriage 4, or handle (not shown); a mechanism for detaching the coating member and feeding system in its of a coating material (not shown). The rollers 1 and 2 are designed to be capable of bending easily in any direction of flexible shafts and have high torsional stiffness and low bending stiffness and comprise an inner cavity 8, the duct 9 for supplying the coating material. The rollers 1, 2 having walls permeable to the coating material, ensure delivery the latter from the inner cavity of the roller to the treated surface for example through the holes 10. One end (A) of each of the rolls 1, 2 is rotatably mounted, for example, in bearing units (not shown) on the carriage 4 and through the axis (not shown) is connected to the rotary actuator 3. The other end (B) of each roller 1, 2 is rotatably mounted, for example, in bearing units (not shown) in an open ends of arcuate brackets 5, 6. The brackets 5, 6 are mounted on the carriage 4 at a distance somewhat exceeding the diameter of the treated cylindrical article and at the distance sufficient to accommodate its cross section between the brackets. The brackets 5, 6 movably joined with the carriage 4 by means of swivel (not shown), providing an opportunity of mutually perpendicular rotation of brackets 5, 6 toward each other from the disconnected state I (coating member shall be open) into operating status II with the semi-circular transverse enfold of the pipe (coating member is closed). When you open state the coating member (I) arcs of the brackets 5, 6 are oriented vertically along the pipe, convex toward each other, when closed (II)oriented horizontally across the pipe, convex upwards. Rotary actuator 3 provides mutually opposite directions of rotation of rollers 1, 2 oppositely placed with respect to the cylindrical article; it contains a reversible motor, in which can be used the thermal, electric, pneumatic or hydraulic motor (not shown). Detachment and connection of the coating member provides by mechanism, which is comprising: a system of hinged lever linkage (not shown), which connecting the end of the brackets 5, 6, movably associated with the carriage and ensuring their consistent rotation around the vertical (y) and horizontal (x) axes; connection means of the coating member in an open and closed state and means of remote control of the traction system, as which may be used wire and/or hydrocylinder and/or pneumatic cylinder and/or the electromagnetic traction (not shown). The rollers 1, 2 may have a core 11 of resilient material and/or rows of wound wire having a fleecy and/or porous coating 12. The brackets 5, 6 may be mounted on the carriage 4 with the possibility of varying the distance therebetween depending on the diameter of the cylindrical treated article (not shown). A coating material feeding system toward coating member comprises mechanisms, which provide feeding of the coating material under pressure into the coating member, including a container with coating material, a flexible hose for feeding a coating material into the coating member, the priming pump (not shown). In some cases of implementation coating member may include optional rotating roller 13 adapted to congruently annularly encompass the periphery of a cylindrical article to be treated, and additional arcuate bracket 14 movably coupled to the carriage 4. Brackets with rollers are mounted so that enfold of the pipe on one side is provide by the roller (1), where on the other side by two rollers(2, 13). When in open state of the coating member (I) arcs of the brackets 5, 6, 14 oriented vertically along the pipe, where the convex of pairs of brackets 5, 6, as well as the brackets 5, 14 face each other; when in the closed (state II)are aligned horizontally across the pipe, convex upwards.

INDUSTRIAL APPLICATION

(6) Claimed apparatus operates as follows. Treated cylindrical articles disposed between the brackets 5 and 6 or between the brackets 5 and 6, 14. With help of mechanism of detachment and connection (not shown) the brackets 5 and 6 are rotated first around the vertical axis y, thereby providing mutually perpendicular turning towards each other and thenabout a horizontal axis x, providing the semi-circular transverse enfold of the treating article. And then made a turn of the arcuate bracket 14 with the roller 13 (if available), first around a vertical axis y, then the horizontal axis x. In this, flexible rollers 1, 2, 13 tightly grip the treated pipe by its periphery providing congruent pairing of the coating surface of the latter with an outer surface of the treated pipe. Closed (working) position II of the coating member connected by the connecting means (not shown) prevent unauthorized opening of the latter. Rotary actuator 3 provides synchronous rotation in the opposite direction of the oppositely arranged rollers 1 and 2 or 1 and 2, 13, providing translational motion of the coating member along the treated pipe. When the engine is switched into reverse mode, direction of motion of the coating member is reversed. The coating material is fed under pressure from a compressed air tank through a flexible hose (not shown), through the channel 9 into the internal cavity 7 of the rolls 1, 2, 13 and through holes 10 supplied to the treated surface of the pipe. Upon rotation rollers 1, 2, 13 are bent, wherein the curvature of its working surface coincides with the curvature of the cylindrical article to be coated. During rotation of the roller around its axis, as it is made of resilient material and its axis of rotation maintains a curvilinear shape, layers of the working sheath of the roller cyclically compressed and stretched depending on which side of the roller they are (convex or concave), providing a uniform coating on the pipe's surface. After coating, the working member is opens and releases the pipe. The inventive design is simple, lightweight, compact and economical.