SU1743728A1 - Apparatus for dressing sites adjacent to annular weld seams - Google Patents

Abstract

Use: the invention can be used for cleaning the near-ovary zone of annular welds of pipelines under ultrasonic testing (UT). The invention: the device uses a connecting rod-crank mechanism mounted on the output shaft of the drive, which creates the possibility of adjusting the stroke of the reciprocating movement of the working body mounted on another output shaft of the device. When the drive is turned on, simultaneously with the rotation of the working member, the rotation mechanism is activated, which is equipped with a transmission mechanism and a ratchet mechanism. In this case, the carriage moves around the pipe at a distance equal to the feed of the working member. 4 il.

Description

ate with

The invention relates to the means of mechanization of installation work, is used for cleaning, the heat-affected zone of the annular welds of pipelines of various diameters for ultrasonic testing (UT).

The aim of the invention is to simplify the design of the device.

FIG. 1 shows the described device, side view; in fig. 2 - the same, top view; in fig. 3 is a view along arrow A in FIG. one; FIG. 4 is a section BB in FIG. 2

The working body 1, made in the form of a petal circle, is mounted in a vertical plane and mounted on the shaft 2 of the actuator 3, the body 4 of which is mounted on the guides 5 of the frame 6 with the possibility of longitudinal reciprocating movement along the axis of the pipe 7 under the influence of the longitudinal movement mechanism 8, including a controllable one-way clutch mounted on

the shaft 9 of the drive 3 and consisting of the movable coupling half 10 and the fixed coupling half 11, which is made integral with the crank 12, in the radial groove of which is mounted with the ability to move (adjust the stroke of the working body 1) and fix (relative to the groove) the finger 13 on which is hinged one end of the connecting rod 14. The other end of the connecting rod 14 is pivotally attached to the frame 6, installed with the possibility of swinging in a vertical plane on the axis of the hinge 15 of the carriage 16. The carriage 16 is provided with rollers 17, on which it runs around the guides of the transport ring 18 around the machined pipe 7 under the action of the rotation mechanism 19, made in the form of a pinion gear 20, rolling along the crown 21 of the transport ring 18 and receiving rotation through the transmission mechanism 22, which includes gears 23 and 24 and a one-way ratchet mechanism 25,

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mounted on the carriage 16 and including a ratchet wheel 26 rigidly connected to the gear wheel 24 and mounted coaxially with the hinge 15, locking the pawl 27 with the spring 28, the leading pawl 29 with the spring 30 mounted on the beam 31, in the slot of which the finger 32, which is fixed to the housing 4 of the actuator 3 and during reciprocating movement, acts on the beam 31, which ultimately drives the drive gear 20. The ratchet mechanism 25 is equipped with a movable limiter m a visor 33 mounted in the groove of the frame 6. The actuator 3 with the working body 1 is pressed against the surface of the processed pipe 7, mounted between the frame 6 and the carriage 16, spring 34.

The device works as follows.

A transport ring 18 is mounted on the pipe 7 in the heat-affected zone. The carriage 16 of the device is mounted by rollers 17 on the guides of the transport ring 18, while the pinion gear 20 of the rotation mechanism 19 engages with the gear ring 21 of the transport ring 18. The pin 13 is mounted and secured in the radial groove of the crank 12 equal to half the required stroke of the working body 1.-The stop 32 is exposed and fixed on the housing 4, and the movable restriction visor 33 is exposed and fixed in the slot of the frame 6 in the position providing the specified feed rate p bochego body 1. The movable coupling half 10 is brought into engagement with a fixed half coupling 11.

When the drive 3 is turned on, the rotational movement of the crank 12 is converted by means of the connecting rod 14 into reciprocating movement of the drive housing 4.

and

3 with the working body 1. At the same time, the rotation mechanism 19 is actuated; moreover, when the housing 4 with the drive 3 moves to the left (toward the seam), the movable stop 32

5 acts on the beam 31, rotating it together with the leading dog 29, which slides along the tops of the teeth of the ratchet wheel 26, fixed against rotation by the dog 27. During the reverse movement of the drive 3

10, the pawl 29, which is pressed against the spring 30, engages with the ratchet wheel 26 and, rotating it together with the gear wheel 24, transmits rotation through the gear wheel 23 of the pinion gear 20, which rolls along the gear ring 21 of the transport ring 18 and moves the carriage 16 around pipe 7 at a distance equal to the supply of the working body 1 (radial circle) minus 5-10 mm. In this case, the locking 20 dog 27 slides along the tops of the teeth of the ratchet wheel 26. The processing of the adjacent heat-affected zone is carried out similarly after the device is re-installed on the other side of the weld.

Claims (1)

25 claims A device for stripping the weld zone of circumferential welds, containing a working member mounted for longitudinal movement on guide frames hinged on the carriage, and moving around the pipe by means of an actuator and rotation mechanism, characterized in that, in order to simplify the design , 35 the drive is made with two output shafts, one of which is equipped with a working member, and the other is connected to the frame by means of a connecting rod-crank mechanism introduced into the device, and the mechanism The rotation 40 is provided with a ratchet mechanism, the ratchet wheel of which is mounted coaxially with the hinge axis of the frame attachment, and the drive dog is kinematically connected with the drive housing. 45 00 Sad a Fm.d 32 33 26s U, 1