SU1576298A1 - Shot-blasting unit for cleaning external and internal surfaces of tubes - Google Patents

Abstract

The invention relates to the treatment of products with shotgun, namely the shot blasting of pipes, and can be used in various areas of engineering, in particular in the boiler industry to remove solid glass grease and rust from the outer and inner surfaces of large-sized pipes after they are pressed. The purpose of the invention is to increase the operational reliability of the device. The shot blasting device comprises a chamber 1, a roll-out wall 2 mounted on a drive carriage 3, carrying a supporting pivot-centering device 4. Roll-out wall 2 has the ability to fix it in the working position at the ends of the chamber walls matching it. In the chamber there are shot-blasting heads of the inner 13 and outer 14 cleaning. Drobemet head 13 is installed on a vertically movable rod 15, made with a longitudinal window in which plates are installed, located with partial overlapping one another, parallel to each other and estrus, with equal pitch along the height of the rod. The blast head 14 is made in the form of a carriage 27, in the upper part of which there is a hopper 30 with a shutter 31, under which the shot blaster 32 is mounted with a drive 33 of its rotation. On the uprights 34 of the roll-out wall 2, a mechanism 35 for holding and centering a hinged-lever pipe in the form of self-aligning rollers is installed centrally symmetrically relative to the axis of the rod and can be rotated in housings connected in pairs through two shoulders, one of which is connected to driven. In the working position, the axis of the rod 15, the supporting pivoting centering device 4, and the pipe holding and centering mechanism 35 lie on one straight, cleaning axis or pipe 44 axis. 1C. f-ly, 9 ill.

Description

The invention relates to the treatment of products with shotgun, namely, shot blasting of pipes, and can be used in various areas of machine building, in particular in nuclear and boiler building to remove solid glass grease, scale and rust from the outer and inner surfaces of large pipes after their press.

The purpose of the invention is to increase the operational reliability of the device. FIG. 1 given the device, a general view; in fig. 2 is the same, side view, in FIG. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. 2j in FIG. 5 is a section B-B in FIG. 2; in fig. 6 — node I in FIG. 3, in Fig. 7, a section of YYD in FIG. 3, in FIG. 8 — node II in FIG. V, FIG. 9 is a section D-D in FIG. five.

The shot blasting unit for cleaning the outer and inner surfaces of the tubes comprises a chamber 1 with a roll-out wall made in the form of a bulk metal structure 2. which is mounted on a driving carriage 3 bearing a supporting pivoting centering device.

The latter is made in the form of a rotary table 5 with centering cams 6 (Fig.6 and 8), which can be moved along rails 7

by means of a screw gear 8, while the cams 6 are installed with a gap in the guides 7, the profile of which contains vertical and inclined surfaces (FIG. 8) with the inclination angle of the latter, the value of which is not less than the angle of repose of the shot, which makes it possible to spill abrasive material into the slot 9 of the table 5 and further into the lower hoppers 10 of the fractional regeneration system and excludes jamming of the cams 6 in the guides 7.

The bulk metal structure 2: has the ability to fix it in the working position at the ends of the chamber walls that mate with it by means of grips 11 connected to the rods of pneumatic cylinders 12.

In the shot-blasting chamber 1 are mounted shot-shooting heads of the inner 13 and outer 1 cleaning.

An internal cleaning blasting head 13 is mounted on a hollow vertical movable rod 15 placed in guide rollers 16 mounted in racks 17 on the roof of the chamber 1 on which the actuator 18 of vertical movement of the rod 15 is placed.

The latter has a vertical longitudinal window in which plates 19 are installed (Fig. 3 and part 51

partially overlapping one another, parallel to each other and the same 20, with an equal step along the height of the rod 15 and at an angle to its longitudinal axis, the magnitude of which is no less than the natural angle of the slope of the fraction

In the lower part of the rod 15 its side walls are formed by a reservoir, which serves as an intermediate hopper 21 for the shot with a shutter 22 in its outlet part.

Between the rod 15 and the shot-beam head 13 there is a chamber 23 for supplying compressed air.

The blast head 1j contains blades 24 that can be rotated by means of a rotor 25 from an electric motor 26.

The external shot-cleaning head 14 is made in the form of a carriage 27, which can be vertically moved along stand 28 by means of an actuator 29. At the top of the carriage 27, a hopper 30 with a shutter 31 is installed, under which the shot blaster 32 is mounted with a drive 33 of its rotation.

On the uprights 34 of the metalwork 2, a mechanism 35 for holding and centering a hinged-lever type pipe is installed with the possibility of vertical movement of its frame 36 on the guide frames by means of an actuator 37.

The mechanism 35 is made in the form of self-aligning rollers 38 (FIGS. 4 and 5) placed centrally symmetrically with respect to the cleaning axis with the possibility of their rotation in the housings

39, The latter have the ability to rotate in the plane of rotation of the rollers 38 and are fixed in double-levers

40, which are connected in pairs by t gami

41, hinging their respective shoulders, and kinematically connected by means of a driving rod.

42 connected to the rod of the power cylinder 43.

The levers 40 and mounts 41 are hingedly mounted in the frame 36. The axes of rotation of the rollers 38 and the rotation of the housings 39 are offset, which allows the rollers to self-align.

In the working position, the axis of the rod 15, the supporting turn-centering device 4, and the pipe holding and centering mechanism 35 lie on one straight axis, the cleaning axis or the axis of the pipe 44 being cleaned.

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The camera has a regenerative system - 1 fraction containing the lower bunkers 10, placed under the floor of the chamber, under which the vibrating conveyor 45 is installed with a vibrating screen 46.

In addition, elevator 4 and 48 located outside the chambers, a separator with a bunker, enter the regeneration system. Q rum 49 waste as well as auger

a conveyor 50 placed above the storage bin 51 mounted on the roof of the chamber.

The storage bin 51 is divided into j. two bins 52 and 53, while the bunker 52, having a bolt 54, is connected with a chute 20 with a window of the rod 15 and the bunker 53 is connected with a chute 55 with a bunker 30.

The device operates as follows 2Q.

In the initial position, the trolley 3 for the pipes 44 is at the loading position, the mechanism 35 is at the lower point, its levers 40 are open. Moving 25 with the help of a screw gear 8, the cams 6 of the turntable 5 of the carriage 3, set them to a predetermined diameter of the tube plus a gap of 10-20 mm per side.

By a known lifting device, a pipe 44, in a vertical position, is lowered through the mechanism 35 onto the table 5 of the carriage 3. The mechanism 35, in the open failure of its arms 40 with the rollers 38, is moved by means of an actuator 37 to its first working position, not income -2.5 m. up to the upper end of the pipe 44. With the help of the power cylinder 43, tg 42, levers 40, the pipes are clamped and self-rotated | with rollers. The known lifting devices are removed from ip / br and retracted. Te jieuvt ti j with a pipe 4) using a VJRZNTST R drive, drive 1 up to the metal construction 2 and set at 45 trolley 3 at the end of the camera, and directly to the encoder of the trolley 3 approach at a slower speed.

After the trolley 3 is stopped, the metal structure 2 is fixed by means of grippers 11 and pneumatic cylinders 12 and thus forms a single unit with the camera body, and the axis of the pipe being cleaned 44 is aligned with the axis of the rod 15 of the internal cleaning device. 55 By means of the drive 18 and 29 of the shot-blaster on the head 13 of the internal cleaning and the Drobemetnaya head 14, the external cleaning moves to the initial position / for cleaning with the march speed and

thirty

stops. Then, the drive 33 of the shotblasts rotation is turned on, the supply of compressed air to the chamber 23 of the rod 15 is opened, the shot is supplied to the shotguns, and the rotational drive of the pipe is turned on. The shot is supplied to the internal cleaning head 13 from a hopper 52 with a shutter 5 installed on the lid of the chamber 1, through a chute 20 through the plates 19 of the rod 15 to an intermediate hopper 21 with a shutter 22 in its lower part. The presence of the intermediate hopper 21 dramatically reduces the destruction of the fraction during the fall.

The compressed air supplied to the chambers 23 picks up the shot moving out of the gate 22 and informs it of additional acceleration when entering the blades of the 2k shot-jet head 13.

The shot feed to the external shot blasting head 14 is made from the storage bin 51, which supplies the shot to the hopper 53 through the heat 55, and then to the bunker. 30, mounted on a shotgun carriage 27, and on a shot blaster 32.

Departure at high speed from the shotblasting heads 13 and 14, the fraction acts on the inner and outer surfaces of the pipe 44 and cleans it. The used shot and cleaning products fall into the hoppers 10 under the floor of chamber 1, and the designs in vibrating transformers 45 and vibrating screens 46. On vibrating screen 46, the shot drops out of twisted scale (or other cleaning products). The fines fall into the elevator 47, then into the separator, where the shot is recyclable from dust. A valid fraction enters the screw conveyor 50 and then into the hopper 51 on the roof of the chamber.

The waste of cleaning enters the second elevator 48 and then into the waste collection bunker 49.

The dust generated during the cleaning together with the air is sucked out of the chamber by a ventilation system with wet dust collectors.

After the pipe makes one revolution, the ring is cleaned, the internal cleaning blasting head 13 is moved at a predetermined operating speed, the inner surface of the pipe is cleaned, and the fraction is fed to the external cleaning shotgun. After

This causes the movement of the mechanism 35 to the second operating position not a 0.5 m income to the upper end of the pipe 44, but the shot blasting carriage 27 - down by 1-1.2 m. Then, the marching speed of movement of the shot blasting carriage 27 is changed to the working speed g, cleaning up. At the same time, the feed of the shot to the shot blasting unit 32 opens, the cleaning process continues.

Each of the shot blasting heads 13 and the outer and inner cleaning moves according to its program until the end of the cleaning, then turns off and returns to the extreme upper position. At the same time, the supply of the shot (and compressed air to the internal cleaning blast head 13) is closed. After the cleaning is completed, the rotation of the pipe 44 is turned off. Then, the grippers 11, which fix the trolley 3 in the chamber, are opened. The cart 3 with the cleaned tube 44 rolls out to the loading / unloading position. A known load device is fed to the pipe and fixed to the pipe. The levers 40 open and release the pipe 44, the mechanism 35 is lowered to the lower position.

Claims (1)

1. Shotblasting device for cleaning the outer and inner surfaces of pipes, made in the form of a rectangular closed chamber containing a supporting rotary-centering device, a mechanism for fixing pipes in a vertical position, droblet heads for internal and external cleaning and a fractional regeneration system in order to improve reliability, the device is equipped with a roll-out wall installed with the possibility of fixation with guide posts placed on the minutes trolley carrying the pivotally-centering ustroy- GUSTs, wherein the locking mechanism is mounted on a withdrawable pipe wall and is mounted for vertical movement in guide racks, and a shotblast head for cleaning the inside is mounted on a hollow vertically movable rod inserted into the device, placed in the guide rollers inserted into the device located on the upper wall of the chamber, the longitudinal window in the rod being made, and the shot-blasting device equipped with plates installed in the said longitudinal window another parallel to each other and the churn of the fractional regeneration system with an equal step along the height of the rod. 2 "Device according to claim 1, characterized in that the fixation mechanism of the pipes is made in the form of self-aligning rollers placed centrally symmetrically with respect to the axis of the bar, fixed in double-arm levers, pairwise connected by means of hinged shoulders and kinematically connected to each other additionally introduced driving thrust. Ventilation system  TG / T1 H , / , vUtdjUllLJ ten Fig1 Pure shot Oft trash -r-shch ten Fig1 No 29 P6Z9 / SI i FIG. 7 FIG. at fi. 9 L 39 FIG. AT