RU2395347C1 - Plant for painting pipe inner surface - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to processing equipment intended for painting pipe inner surfaces and can be used in machine building for painting inner surfaces of parts with tubular cylindrical shape, including shell rings, vessels and machine parts. Proposed plant has guides linked by cross beam and arranged on support surface. Said guides support "П"-shape protective screen to be rolled manually thereon and transport carriage with two support assemblies furnished with support rollers. Pipe to be painted is arranged on said rollers by means of temporary rings. Screen height exceeds that of the carriage with pipe placed thereon. One of aforesaid support assemblies accommodates ripe rotation friction drive representing geared motor. Reversing steel rope drive that moves said carriage along the bar is mounted on the frame crosswise beam and represents electric winch. Steel rope is wound on winch drum, rope one end being fastened to said drum. Said steel rope is passed through holes made in support assemblies enveloping the block mounted on the frame mounting plate and has its other end fastened on the carriage. Grid terminal position pickups are mounted on aforesaid guides and connected to control board. Rubbing assembly is additionally mounted on the bar. Said assembly represents air-driven engines of rotation and pneumatic cylinders to feed cylindrical drums with brushes to and withdraw them therefrom. Air ducts and pipes are laid inside the hollow bar furnished with mounting openings made on its surface.

EFFECT: automated painting, higher quality, improved working conditions.

2 cl, 9 dwg

Description

The invention relates to technological equipment for painting the inner surface of pipes and can be used in mechanical engineering for painting the inner surface of products of a tubular cylindrical shape, including shells, containers and machine parts.

Known: installation for automatic painting and drying of products in the form of bodies of revolution (USSR, as.with. 242714) and a spray chamber (Russian Federation, application No. 2004118498/12) containing at least one spray nozzle forcing a compressor and system management.

Also known is the two-color airless spray painting unit OR - 14264-GOSNITI, which contains two separate spray material feeding systems mounted on one cart (Methods and equipment for painting and drying products Kanterova T.I., Sukhareva T.M. et al. Overview information. Series “Technology of paint coatings.” - M.: NIITEKHIM, 1987, p.4).

The prototype of the claimed object of the invention is the installation for applying paint and varnish coatings on the inner surface of the pipes, developed at the Research Institute of NPO "Spectrum". It contains a frame with a horizontal supporting surface and a vertical mounting plate on which is mounted coaxially with the painted pipe and the rod that enters inside it with spray nozzles, paint injection tanks, air lines with pneumatic distributors, pipelines, mechanisms for mutual rotation and movement relative to the painted pipe of nozzles and a remote control Management (Methods and equipment for painting and drying products Kanterova T.I., Sukhareva T.M. et al. Overview. Series "Technology of paint and varnish coatings . "- M .: NIITEKHIM, 1989, p.2).

The installation adopted as a prototype allows you to apply paint and varnish material on the inner surface of pipes with a length of up to 12 m and a diameter of 50-2000 mm. However, due to the fact that it allows manual movement of the rod with the spray head, it is difficult to achieve uniform application of the paintwork on the surface of the product along its length, i.e. the quality of the coating depends on the human factor, which is a disadvantage of the prototype.

The objective of the invention is to improve the specified installation, further automation of the pipe painting process, improving the quality of painting and improving the working conditions of workers engaged in production.

This goal is achieved by the fact that in the installation for painting the inner surfaces of pipes (or tubular products), containing a frame with a horizontal supporting surface and a vertical mounting plate, on which is fixed coaxially with the painted pipe and the inside of its rod with spray nozzles, paint-pressure tanks , air lines with pneumatic distributors, pipelines, mechanisms of mutual rotation and movement relative to the painted nozzle pipe and control panel, on the supporting surface of the frames guides interconnected by a transverse beam are made, on which a U-shaped protective screen is installed with the possibility of manual longitudinal rolling along them and a transport trolley with two lodgements equipped with support rollers, on which the painted pipe is fixed using technological rings, while the height of the screen exceeds the height dimension of the trolley with a pipe placed on it; on one of the lodgements of the trolley there is a friction pipe rotation drive, made, for example, in the form of a gear motor, and The transverse beam of the frame is mounted with a reversible cable drive for moving the cart along the bar, made in the form of an electric winch, on the drum of which a rope is wound and fixed, passed through holes made in tool holders, an envelope roller mounted on the mounting plate of the frame and connected to the cart, on the guides of the frame mounted sensors of the final positions of the trolley, electrically connected with the control panel, and on the rod, an additional wiper assembly is made, made in the form of equipped with pneumatic motors with rotation fins and pneumatic cylinders for radial inlet - outlet to the inner surface of the pipe of cylindrical drums with brushes, while the air lines and pipelines are laid inside the rod, which is hollow and equipped with mounting windows located on its surface.

In addition, the brushes are made of pieces of water-absorbing antistatic fabric attached to the surface of cylindrical drums.

The invention is illustrated by drawings, where figure 1 shows a General view of the inventive device, figure 2 - remote element A in figure 1, figure 3 - external element B in figure 1, figure 4 - external element B figure 1, figure 5 - remote element G in figure 1, figure 6 - remote element D in figure 3, figure 7 - remote element E in figure 3, figure 8 - remote element W in figure 1, figure 9 is a view 3 in figure 1.

The installation includes the following main parts and assembly units: frame 1, on the vertical mounting plate 2 of which the rod 3 is fixed (Fig. 1), and on the horizontal 4 of the supporting surface, guides 5 are connected to each other by a transverse beam, on which the cart 6 ( figure 2). On the rod 3 (Fig. 1), a rubbing device 7 (Fig. 4) and a spray head are fixed 8. A drive 9 (Fig. 1) for longitudinal movement of the carriage 6 (Fig. 2) is mounted on the transverse beam of the frame 1. The components necessary for painting the product 10 are placed in the paint injection tanks 11 (Fig. 1). The control of the painting process is provided automatically by the remote control 12 (Fig. 9) of the control system, electrically connected with the elements of pneumatic-hydraulic automation, inductive sensors of the end positions 13, 14, 15 (Fig. 3), 16, 17 (Fig. 8) and 18 (Fig. .6) trolley 6 on the frame 1. The activator of the sensors 13 ... 18 is the wheel 20 of the trolley 6 (Fig.6).

The cart 6 has a front 21 and rear 22 (figure 1) tool tray. Support rollers 23 are mounted on the lodgements (FIG. 2 and FIG. 7), onto which, using technological rings 24, a painted article 10 is installed (FIG. 7). A rotation drive 25 (Fig. 1 and Fig. 7) is also installed on the front lodgement of the trolley 21, including a gear motor, a roller 26 is mounted on its shaft, providing friction coupling with the process ring 24 and transmitting torque to the product 10 (Fig. 2 .

The drive 9 (figure 1) of the longitudinal movement of the trolley 6 (figure 2) is made in the form of an electric winch 27 (figure 2), on a drum 28 of which a rope 29 is wound and fixed, passed through holes (not shown in the drawing), made in lodges 21 and 22 (FIG. 1) of the cart 6, (FIG. 2) the envelope mounted on the circuit board 2 of the frame 1 roller 30 (FIG. 5) and connected to the cart 6.

The device for wiping 7 (figure 4) includes two diametrically opposite cylindrical drum 31 with brushes and a drive made in the form of pneumatic cylinders 32 and pneumatic motors 33, providing diametrical movement of the drums 31, respectively pressing them to the inner surface of the product 10 and rotation. Brushes are made of pieces of water-absorbing dielectric fabric and are fixed on the surface of the drums.

The spray head 8 (Fig. 4) includes four nozzles, one of which, for example, 34, is intended for spraying the solvent necessary for degreasing the surface to be painted, the other two 35 and 36 for sequential application of the primer, and the fourth 37 for applying the paintwork . The paintwork can also be supplied through two nozzles - 36 and 37.

The rod 3 (Fig. 1) is made of several interconnected tubular sections in which pipelines (or hoses) 38 for supplying components and working bodies necessary for painting the product 10 are laid. For the convenience of laying pipelines 38, windows 39 are made on the side surface of the rod.

To prevent spraying of the components of the paint coating in the space of the working room in the zones of the initial and final positions of the product 10, on the guides 5 (figure 2) of the frame 1 there is a screen 40 (figure 1), which has a U-shaped shape, equipped with wheels (in the drawing not shown) and has the ability to manually roll around the frame 1. The height of the screen 40 exceeds the height of the cart 6 with the product 10 placed on it, and the width is selected equal to 300 ... 500 mm.

The product painting process involves the sequential execution of the following operations: degreasing the inner surface of the product with a solvent, applying the first primer layer, applying the second primer layer, applying the main paint coat - enamel. After each operation, drying is performed. Four products are sequentially painted. First, product No. 1 is degreased, then transferred to the drying section, product No. 2 is installed in its place, it is degreased and then dried. Degreasing operations are repeated similarly on products No. 3 and 4. Then, after drying, the product No. 1 is again installed on the cart 6, it is primed with the first layer and subsequent drying in the drying section. Similar operations are performed on products No. 2, 3 and 4. After this, operations are carried out to apply the 2nd primer layer, dry it and, finally, apply and dry the main paint coat - enamel on each product and subsequent drying of the coating. At the end of the painting, the pipelines 38 and the nozzles 34 ... 37 are flushed with solvent.

Work in degreasing mode.

The initial position of the trolley 6 with the product 10 installed on it (Fig. 1) is the extreme right. The operator on the remote control 12 (Fig.9) of the control system includes a button "Degreasing". In this case, the drive 9 (Fig. 1) of longitudinal movement is turned on, which, using the cable 29 (Fig. 2), moves the trolley 6 along the rod 3. At the same time, the drive 25 (Fig. 7) of rotation of the painted product 10 (Fig. 1) is turned on. When the wheel 20 of the trolley 6 reaches the sensor 13 (Fig. 3) installed in the slot of the guides 5 (Fig. 2 and Fig. 6), the latter includes a solvent supply system to the nozzle 34 (Fig. 4), which applies the solvent to the inner surface of the product 10. When the wheel 20 (FIG. 6) reaches the sensor 14 (FIG. 3), pressure is applied to the pneumatic cylinders 33 (FIG. 4), the rods of which extend, the drums 31 with brushes are pressed against the inner surface of the product 10, begin to rotate and produce rubbing it. When the wheel 20 reaches the sensor 16 (Fig. 1 and Fig. 8), the solvent supply system to the nozzle 34 is turned off (Fig. 4), and when the wheel 20 reaches the sensor 17, the air motor 33 is turned off (Fig. 4), the drums 31 stop rotating, the rods pneumatic cylinders 32 are returned to their original position. The drive 25 rotates the product. The control system 12 (Fig. 9) switches the actuator 9 (Fig. 1) of the longitudinal movement of the trolley 6 to the reverse. The trolley with the product begins to move to its original position. When the wheel 20 reaches the sensor 18 (Fig.6), the truck 6 stops. Overload the product 10 from the cart 6 into the drying chamber (not shown) and load another product on it.

Work in the mode of applying the 1st coat of primer.

The initial position of the trolley 6 with the product 10 installed on it, as with degreasing, is the extreme right.

The operator on the remote control 12 (Fig.9) of the control system includes a button "SOIL 1". In this case, the drive 9 (Fig. 1) of longitudinal movement is turned on, which, using the cable 29 (Fig. 2 and Fig. 3), moves the trolley 6 along the rod 3 (Fig. 1). At the same time, the drive 25 (Fig. 1 and Fig. 7) of the rotation of the product is turned on. When the wheel 20 reaches the bogie 6 of the sensor 14 (Fig. 3), the solvent supply system for the nozzles 35 and 36 (Fig. 4), which apply soil to the inner surface of the product 10 (Fig. 1), is activated. When the wheel 20 reaches the sensor 13 (Fig. 3), the soil supply system to the nozzle 35 is turned off (Fig. 4), and when the wheel 20 reaches the sensor 16 (Fig. 8), the soil supply system to the nozzle 36 is turned off (Fig. 4). Turns off the drive 25 (Fig.1 and Fig.7) rotation of the product. The control system switches the actuator 9 (figure 1). longitudinal movement of the truck 6 to the reverse. The trolley with the product begins to move to its original position. When the wheel 20 reaches the sensor 18 (Fig.6), the truck 6 stops. The product 10 is overloaded from the cart 6 into the drying chamber and the next product is loaded onto it.

Work in the application mode of the 2nd coat of primer.

The installation in the application mode of the 2nd primer layer is similar to the operation in the application mode of the 1st primer layer. The operator on the remote control 12 (Fig.9) of the control system includes a button "SOIL 2". Next, the control system fulfills the previous program.

Work in the mode of applying enamel.

The operator on the remote control 12 (Fig.9) of the control system includes a button "LAC". The operation of the installation in the application mode of enamel coating is similar to the operation in the application mode of the 1st layer of primer. In this case, the enamel is turned on to the nozzle 37 (Fig. 4), applied to the painted surface of the product 10 (Fig. 1), and the product is returned to its original position after painting.

In the process of degreasing and applying layers of soil and enamel, the screen 40 is installed in the area where the spray heads 8 are located (Fig. 4), when performing loading operations with painted products, it is manually rolled along the guides to the required distance. Before the start of the next cycle of operation, the screen 40 is again installed in the area of the spray heads 8 (Fig. 4).

Work in the flushing mode of hydraulic elements.

Hydraulic system elements are flushed after the end of the working week. To do this, on the paint injection tanks 11 (Fig. 1), shut off the product supply valves and close the air supply valves, open the solvent supply valves and turn on the RINSING mode on the control panel 12 (Fig. 8). Flush all elements of the hydraulic system. After washing the hydraulic system from the tanks 11 (Fig. 1), special bucket inserts (not shown) are removed, the remaining components of the paintwork are poured from them, and the buckets and the product feed pipe are also washed with solvent.

The proposed installation for painting the inner surface of the pipes allows, almost completely, to automate the painting process, to improve the quality of the paint coating of products and improve the working conditions of workers involved in painting.

Currently, the applicant is developing an installation for painting the inner surface of pipes with a diameter of 900 mm and a length of up to 6000 mm.

Claims (2)

1. Installation for painting the inner surface of the pipes, containing a frame with a horizontal supporting surface and a vertical mounting plate, on which is fixed coaxially with the painted pipe and the rod inside it with spray nozzles, paint injection tanks, air lines with pneumatic distributors, pipelines, mechanisms of mutual rotation and movement relative to the painted pipe nozzles and control panel, characterized in that on the supporting surface of the frame are made interconnected transverse ba some guides on which a U-shaped protective screen is installed with the possibility of manual longitudinal rolling along them and a transport trolley with two lodges equipped with support rollers on which a painted pipe is installed using process rings, while the height of the screen exceeds the height of the trolley with on it a pipe, on one of the lodgements of the trolley, a friction drive for rotating the pipe, made in the form of a gear motor, is placed, and a reversible cable is mounted on the transverse beam of the frame a trolley moving drive along the bar, made in the form of an electric winch, on the drum of which a rope is wound and fixed at one end, passed through holes made in tool holders, an envelope around a block mounted on the frame mounting plate and connected to the trolley at the other end, while sensors are mounted on the rails end positions of the trolley, electrically connected with the control panel, and a wiper unit is additionally placed on the rod, made in the form of rotary motors equipped with pneumatic motors and ialnogo supply-discharge pipe to an inner surface of cylindrical drums with brushes, wherein the air pipes and conduits are laid within the rod which is hollow and is provided with mounting windows located on its surface. 2. Installation according to claim 1, characterized in that the brushes are made of segments of water-absorbing antistatic fabric fixed to the surface of cylindrical drums.

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