SU1766697A1 - Apparatus for lining metal tubes with elastic shells - Google Patents

Abstract

Use: protection of the inner surface of metal pipes with an elastic sheath against wear and corrosion. The invention: a mandrel, made in the form of a pipe, on which in mutually perpendicular planes there are ribs with longitudinal grooves and clamping plates hinged at one end. The mandrel is provided with an additional smoothing cone, located the base towards the base of the main cone. The cone is installed with a gap between the bases. In the specified gap are smoothing elements that are made of separate sections, at least two. The screed sections consist of spring-loaded gutters that are in contact with each other by longitudinal edges. The edges of the adjacent sections are offset relative to each other. Performing the mandrel improves the quality of the lining. 9 il. m yo

Description

The invention relates to mechanical engineering, in particular to the protection of the inner surface of metal pipes with an elastic sheath against wear and corrosion, and can be used in various branches of the national economy, in particular, in the mining, construction and chemical industries.

A device for coating the inner surface of pipes is known, comprising a clamp for securing the workpiece turned inside out, an annular heater, a mechanism for moving it, and a source of compressed air 1.

The disadvantages of this device include low productivity, due to the complexity of turning the workpiece inside out, non-simultaneous heating of the pipe along its entire length, frequent connection and disconnection of the source of compressed air.

Closest to the invention is a device for lining metal pipes with elastic shells containing a mandrel made in the form of a pipe, provided with ribs arranged along the plane with grooves fixed along the edges and clamping plates hinged at one end of the pipe a plane perpendicular to the plane of the ribs; a cone for smoothing the casing with a sealing lip at the base; and a feeder for the mandrel into the metal pipe 2.

This device has insufficient reliability due to the fact that glue is applied only on the outer surface.

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there is no hose (sleeve), but not on the inner surface of the pipe, the necessary conditions are not created for the glue to acquire the necessary working consistency. The performance of the device is low, due to the need to hold the pipe for a long time at the site of the lining before the adhesive cures. In addition, the dale head is made in the form of a cuff that does not provide for the quality of gluing; if the cuff is deformed, air bubbles form.

The purpose of the invention is to improve the quality of lining.

Figure 1 shows a general view of a device for lining metal pipes with elastic rubber or plastic shells; figure 2 is a cross section of the lught of the pipe aa in figure 1; on fig.Z - section bb in fig, 2; FIG. 4 is a cross-section E-E of FIG. 5, a mandrel assembly inside a lined pipe; Fig. 5 shows a longitudinal section of a lined pipe with a mandrel and a smoothing unit; Figure 6 illustrates a nest of a curing station with equipment for sealing a lined pipe; Fig. 7 is a general view of a smoothing unit and its longitudinal section in a lined tube; Figures 8 and 9 are cross-sections of the smoothing block G-Y and D-D in FIG. 7.

A device for lining metal pipes with elastic rubber or plastic hoses contains a post 1 dressing blanks of shells (sleeves) on a mandrel 2 (Fig. 1), removing and attaching pressure plates 3 (Fig. 4) to hinges 4 (Fig. 5) of pipe 5 ( Fig, 4) mandrel 2; liquid heater 6 (figure 1), in the cavity of which is the bonding of the shell to the lined pipe and smoothing it; displacement carriage 7 (FIG. 1) of dorns 2 with a workpiece and a smoothing unit (FIG. 7) along railway rails 9 (FIG. 1) by means of cables 10 (FIG. 1) attached at one end to displacement carriage 7 and at the other end the winch 11 (fig. 1), which, through the gears 12 (fig. 1), are driven by the drives 13 (fig. 1), the mechanism of rotation of the lined pipe 14 (fig. 1) during the sticking of the workpiece to it; an adhesive mastic container 15 with a hose 16 with a tip 17 and a valve 18 (FIG. 1) for supplying the mastic by irrigating the inner surface of the pipe; a traverse with an electromagnet 19 (Fig. 1) for moving a lined pipe to an adhesive fluid heater 6 consisting of a double-walled container 20 (Fig. 2), between which there is a liquid (for example, glycerin). Under the bottom of the tank are installed heating elements 21 (figure 2). For simultaneous lining of two pipes, the tank is divided by a partition 22 (Fig. 2) into two compartments 23. To reduce heat loss, the outer surface of the bottom wall and the covers 24 (Fig. 2) are enclosed with heat insulating materials 25 (Fig. 2). Fluid to the heater is supplied by tube 26 (Fig. 2) by means of level regulator 27 (Fig. 2).

The 10 excess liquid formed when heated is discharged through an overflow pipe 28 (Fig. 2). The futeable tube in the heater compartment rests on the support rollers 29 (Fig. 2), which provides the necessary conditions for its rotation. The excess of adhesive mastic on the inclined chutes 30.31 (Fig. 3) flows into the tank 32.33, then it is transferred to the container 15 (FIG. 1) for reuse. Rotation mechanism

0 pipe 14 (figure 1) consists of an annular chute 34 (fig.Z), pipe 35 (fig.Z), on which is fixed a pulley 36 (fig.Z) connected by a belt drive 37 (figure 1) with a drive 38 (FIG. 1) by

5 gear (figure 1). The footable pipe is fixed in the nozzle 35 of the rotation mechanism of the pipe 14 (FIG. 3) with stop screws 39 (FIG. 3). The mandrel 2 is made in the form of a pipe 5 (Fig. 4), along which two ribs 40 (Fig. 4) are fixed in the diameter direction, connected to the grooves 41 (Fig. 4). Pipe 5 (figure 4) using collapsible hinges 4 (figure 5) is connected with two diametrically located at an angle of 90 °

5 ribs 3 (figure 4), which contain chute 44 and 45 (figure 4). To reduce the area of contact of the grooves 45 (Fig. 4) with the inner surface of the lined pipe and the violation of the layer of glue on the edges of the groove 44

0 balls 46 are welded (figure 4) with a diameter of 10 mm and in a step of 30-40 mm The end of the pipe 5 of the mandrel opposite from the hinges is connected to the smoothing unit 47, consisting of two cones 48 (figure 7), of two (like mini 5 min) sections 49 (Fig.7), spring-loaded short grooves 50 (Fig.7). The section consists of four grooves, each of them mounted on two spring-loaded racks 51 (Fig.7). Longitudinal seams of adjacent sections

0 shifted by 45 °. The post curing of the glue consists of several double support sockets (their number is determined depending on the curing time of the glue and the capacity of the installation) for laying

5 pipes. The supports 52 (FIG. 6) are provided with four hinged bolts 53 with nuts 54, bent to the outer surface of the pipe, fixed with a yoke 55 and a sealing flange 56 with a gasket 57 of thickly elastic sheet material. For submission

compressed air flange is equipped with a fitting 58.

A device for lining metal pipes with elastic rubber or plastic hoses works as follows.

Include liquid heater 6 (figure 1), heat the glue in the tank 15 to the working consistency, clean the inner surface of the lined pipe 59 (figure 2). Using a crane, install the fluted tube 59 onto the support rollers 29 (Fig. 2) of the fluid heater 6, fix the lower end of the tube 59 to the nozzle 35 (FIG. 3) of the rotation mechanism of the pipe 14 (FIG. 1) with screws 39 (FIG. 3). . At post 1, sheath 60 is placed on the chute of mandrel 2 (Fig. 6), the ends of sheath 60 are fastened and clamped between concentric rings of supports (not shown), allowing the sheath 60 to rotate around 180 ° around the longitudinal axis. the outer surface of the shell 60 (Fig.4) with a layer of glue; attached to the hinges 4 (FIG. 5), the pressure ribs 3 (FIG. 5) and deform the shell 60 (FIG. 4). The mechanism of rotation of the pipe 14 (FIG. 1) is turned on and the inner surface of the lined pipe 59 (FIG. 2) is poured from the hose 16 (FIG. 1) with glue, the mechanism of rotation of the pipe 14 (FIG. 1) is turned off, the lower end of the chute 45 is installed (FIG. .4) to the upper end of the fusionable pipe 59 (FIG. 2), and the upper end of the pipe 5 of the mandrel (FIG. 4) to the hinged seat of the carriage 7 (FIG. 1). The mechanism for rotating the pipe 14 (Fig. 1) and the winch 11 (Fig. 1), which feeds the mandrel with the workpiece into the rotating pipe 59, are turned on. At the same time, the surface of the shell 60 (Fig. 4) does not contact the layer of glue on the inner surface of the pipe 59 ( Fig. 4), as the balls 46 move along it, welded with a step of 30-40 mm to the grooves 44, slightly damaging the layer of glue due to the small contact surface. The rotation of the flueable pipe 59 restores the damaged areas of the glue, and also prevents the glue from flowing down the pipe 59, ensuring the uniformity of its layer. At the moment when the end of the shell 60 extends beyond the lower end of the pipe 59 by 100-200 mm, the mandrel supply winch 11 is turned off (FIG. 1). Stop the rotation of the pipe 59, cut the end of the casing. 60 in 6-8 places along the pipe 59, turn and clamp the clamps 55 (6) with the trimmed ends of the casing 6. To the end of the mandrel pipe 5 (Fig. 4), a smoothing unit 47 (Fig. 7) is connected with a cable from the carriage 7 (Fig. 1) for moving the mandrel 2, and includes a winch 11 (Fig. 1) that moves the mandrel 2 in the opposite direction. The cone 48 (Fig. 7) at the same time straightens and centers the sheath 60 (Fig. 5). Spring-loaded short chute 50 (Fig.7) press it to the inner surface

pipe 59 (figure 5). At the moment when the smoothing block 47 (Fig. 7) leaves the opposite end of the pipe 59 (Fig. 5) for one section of the block, the winch is disconnected (Fig. 1), the end of the hose that went beyond the edge of the pipe is trimmed, turned and fixed with a clamp 55 (Fig. 6), disconnect the mandrel 2 from the smoothing unit 47, turn on the winch (Fig. 1) of the opposite movement and re-smooth the hose.

The smoothing unit (Fig. 7) is installed on the bed. Next, open the cover 24 of the liquid heater 6 (figure 2), the valve with the magnetic head plate 19 (figure 1) move the lined pipe 59 (figure 2) on

post curing adhesive under pressure. The ends of the pipe 59 are laid in the support sockets (Fig. 6), the flange 56 is fitted (Fig 6) with the gasket 57, the cavity of the pipe 59 is sealed with the clamping bolts 53, the fitting 58 is connected to the compressed air supply system. The pipe 59 is under pressure until the adhesive cures. Thereafter, the pressure is reduced, the sealing flanges 56 are detached, clamps 55 are removed, the flaps of the shell 60 are cut flush with the outer surface of the pipe 59, and the pipe is sent to the finished product storage. The cycle is then repeated.

Claims (1)

Invention Formula A device for lining metal pipes with elastic shells, comprising a mandrel made in the form of a pipe, provided with ribs arranged in a diametral plane with grooves fixed along the edges and pressure plates hinged in one end of the pipe and located in the diametral plane perpendicular to the plane of the ribs, a cone for smoothing the shell with a sealing lip at the base and a feed mechanism A mandrel into a metal pipe, characterized in that, in order to improve the quality of the lining, it is provided with a second cone placed in the sealing cuff, mounted with the base towards the base of the first cone with a gap between them, and additional cylindrical elements for smoothing located between the bases of the cones and executed at least in the form two sections consisting of spring-loaded grooves in contact with each other by longitudinal edges, the longitudinal joints of the grooves of one section being offset relative to the longitudinal joints of the adjacent section. FIG. 2 FIG. one -and “Q o ro co CO CO tш uLi S5 I five 53 V 50 / T, - g.-1 - il rpri ff /, / / i-Г ° r L, jU L / / j-j, -I -, -, - Mr. M SStssfciBSaBucte (/ -1g-g  - ° I /. y - { -one u /: / agsyHT / - V iV P L / xod  6 Fig 8 // 4g Phage 9