RU2181637C2 - Device for cleaning inner surfaces of pipes - Google Patents

Abstract

FIELD: cleaning pipes from rust, scale, contaminants; cleaning oil well tubing from asphalt-gummy and paraffin deposits. SUBSTANCE: proposed device has frame, movable carriage, rod with cleaning tool secured to this carriage; cleaning tool is provided with primary flat drill and knives with cutters; device is also provided with drive for imparting reciprocating motion to cleaning tools. Primary flat drill is unsymmetrical and its cutting edges are shifted by half pitch of pipe feed. Located between spring-loaded adjustable knives with cutters are flat spring and steel brushes for final cleaning of pipe surface. EFFECT: enhanced efficiency of cleaning badly contaminated pipes; simplified construction. 2 cl, 3 dwg

Description

 The invention can be used for cleaning pipes from rust, scale, scale, pollution, as well as for cleaning oil tubing from tar deposits.

 A device for cleaning the inner surface of pipes containing a frame, a movable carriage with a cleaning tool mounted on it, made in the form of a rod equipped with a cleaning element, and a drive for communicating with the treatment plant of reciprocating movement (SU 464345 A, 07/01/1975).

 The disadvantages of this device are the complicated design and maintenance, the difficulty in cleaning the inner surfaces of the pipes from a hard layer of asphalt-resinous and paraffin deposits.

 A device for cleaning the inner surface of pipes containing a frame, a movable carriage, a rod fixed to it with a treatment plant having a primary pen drill and knives with cutters, and a drive for communicating to the cleaning tool a reciprocating movement (US 4085474 A, 04/25/1978) .

 This device does not resolve the above disadvantages.

 The objective of the invention is to provide a device for cleaning the inner surface of the pipe, providing a technical result, consisting in increasing the efficiency of cleaning heavily soiled pipes, especially oil tubing from tar and paraffin deposits and in simplifying the design.

 This technical result in a device for cleaning the inner surface of pipes containing a frame, a movable carriage, a rod fixed to it with a cleaning tool having a primary pen drill and knives with cutters, and a drive for communicating the cleaning tool with reciprocating motion is achieved by the fact that the primary the first drill is made asymmetrical with offset cutting edges by half the pipe feed pitch, and a flat spacer spring and steel brushes are placed between the adjustable spring knives with cutters for final cleaning of the pipe surface.

 The device has a position indicator of the cleaning tool inside the pipe being cleaned.

 Figure 1 shows the device, a General view; figure 2 - cleaning tool; figure 3 is a view of figure 2.

 The device comprises a frame 1, a carriage 2 with a drive 3, on which a rod 4 is fixed, the front end of which is equipped with a cleaning element 5 having a head 6 with a thread for screwing onto the rod 4, two spring knives 7 and an asymmetric feather drill 8. Spring knives 7 s on the one hand are bolted 9 to the head 6, and between the other ends is clamped by a bolt connection 10 an asymmetric nib drill with offset cutting edges at half the pipe pitch for one revolution, mm. Spring knives are equipped with carbide cutters 11, and a flat spacer steel spring 12 is placed between the knives, constantly pressing the knives to the pipe surface.

 On the back side between the knives are placed steel brushes 13 for the final cleaning of the pipe surface.

 The device operates as follows.

 The pipes to be cleaned are rotated by two drives by means of rubberized rollers that cover the pipe body and rotate it due to the friction force. The lower rollers are stationary driven, and the upper rollers are idle and have vertical displacement by the pneumatic cylinder 14.

 A rod with a cleaning tool 4 is introduced into the pipe to be cleaned by means of a drive carriage 15. The first pipe to be cleaned is a pen drill 8, designed for primary, rough cleaning of heavily soiled pipes and the formation of a necessary hole for the passage of spring knives with cutters.

 The magnitude of the divorce of knives, depending on the diameter of the pipe, is regulated by bolts 16. After the passage of the pen drill and knives with cutters, the steel brushes completely clean the surface of the pipe. The cleaned rust, dirt, asphalt-resinous and paraffin deposits are blown out of the pipe being cleaned by compressed air supplied to the rod from the side of the carriage and entering the cleaning zone through openings in the head. In the process of cleaning the pipe, it is purged with compressed air and the fan is simultaneously suctioning the cleaning products. Polluted air goes through two stages of purification. Primary cleaning - in cyclones, secondary - in bag filters.

 The position of the cleaning tool inside the pipe being cleaned is controlled by means of a movable flag 17, which is mounted on a cable 18, the ends of which are fixed to the rack of the rod 2 carriage. When the rod moves, the flag exactly repeats the movement of the working tool and allows the operator to determine its position at any time.

 Field operation of the device has confirmed its operability and efficiency in the cleaning of tubing that is heavily clogged with products of asphalt-paraffin deposits.

 The minimum length of the cleaning tool, which should be at least 1000 mm, was experimentally established.

Claims (2)

 1. A device for cleaning the inner surface of the pipes, containing a frame, a movable carriage, a rod fixed to it with a cleaning tool having a primary feather drill and knives with cutters, and a drive for communicating the cleaning tool with a reciprocating movement, characterized in that the primary feather drill made asymmetric with offset cutting edges by half the pipe feed pitch, and between the adjustable spring knives with cutters placed a flat spacer spring and steel brushes for final cleaning and pipe surface.  2. The device according to p. 1, characterized in that it has an indicator of the position of the cleaning tool inside the pipe being cleaned.

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