RU2177377C1 - Apparatus for cleaning inner surface of tubes - Google Patents

Abstract

FIELD: different branches of national economy, for example cleaning inner surfaces of tubes of water heating equipment. SUBSTANCE: apparatus includes hollow body having stem for joining with flexible hose for supplying working liquid, washer rigidly secured to outer side of body, made of elastic material and having outer side adjoining to inner surface of tube; shaft rigidly mounted in center of front portion of body. Apparatus also includes cutting head in the form of turbine joined by means of bearing assembly with shaft and having vanes supporting cutting members on their end portions. Cutting members have rounded cutting edges turned along rotation direction of turbine and inclined by acute angle relative to cleaned surface. Hollow body is provided with nozzles directed towards turbine vanes. Gravity center of turbine is shifted relative to its lengthwise axis for deflecting cutting members (at rotation of turbine) from tube center. Spacing between cutting edges and cleaned surface and shift value of gravity center are selected in such a way that edges of cutting members slide on inner surface of tube at turbine rotation. EFFECT: enhanced quality of removing deposits from inner surface of tubes. 1 dwg

Description

 The invention relates to the field of cleaning the inner surface of pipes from solid deposits and can find application in various fields of the national economy, for example, for cleaning the inner surface of pipes of water heating devices.

 A device for cleaning pipelines containing a jet nozzle with cutting elements on the outer surface and a shank to which a flexible hose is connected [1] is known.

 The main disadvantages of this device is that it does not completely remove solid deposits from the inner surface of the pipes, and also that when the device deviates from the axial direction, it abuts against the pipe wall and its progress is suspended.

 It is known that a device for cleaning the inner surface of a pipe is selected as a prototype, comprising a reactive head with cutting elements fixed to the front end and a flexible hose connected to the head by means of a bearing, and the head is equipped with blades rigidly fixed inside its front part at an angle to its axis and facing toward the jet nozzles for supplying jets of liquid, and the shank has a forward projecting part with holes for supplying liquid to the blades and to the front of the device, while the head Hole at the front end [2].

 The main disadvantage of this known device is that it does not completely remove solid deposits from the inner surface of the pipes.

 The aim of the invention is to improve the quality of cleaning the inner surface of the pipe from solid deposits.

 This is achieved by the fact that in a device for cleaning the inner surface of pipes containing a cutting head and a flexible hose for supplying working fluid connected to the head, the cutting head is made in the form of a turbine with a center of gravity displaced relative to the longitudinal axis, equipped with several blades, the ends of which are rigidly fixed cutting elements with rounded cutting edges, turned in the direction of rotation of the turbine at an acute angle to the surface to be cleaned, while the turbine is connected to the shaft with a bearing replicated with the center of the front of the hollow body, which has nozzles directed towards the turbine blades, the back of the hollow body has a shank for connecting a flexible hose, and on the outside of the hollow body a washer of elastic material is rigidly fixed, the outside of which is in contact with the inner wall of the pipes.

 The drawing shows the proposed device.

 The device includes a hollow body 1 having a shank 2 at the rear, to which a flexible hose 3 for supplying working fluid is attached. In the center of the front part of the hollow body 1, a shaft 4 is rigidly fixed, on which a turbine 7 with several blades 8 is fixed using a bearing 5 and locking rings 6, at the ends of which cutting elements 9 with rounded cutting edges are fixed, turned in the direction of rotation of the turbine 7 at an acute angle to the pipe surface being cleaned 10. The distance from the cutting edges of the cutting elements 9 to the inner surface of the pipe 10, as well as the magnitude of the displacement of the center of gravity of the turbine 7 from its longitudinal axis, are selected so that when rotating turbines cutting edges of the cutting elements glided along the inner surface of the pipe. If necessary, the cutting edges can be oriented in space along a helix. In the front part of the hollow body 1, there are nozzles 12 directed towards the blades 8 of the turbine 7. On the outer side of the hollow body 1, a washer 11 of elastic material, for example rubber, is fixed rigidly, for example, rubber, the outer part of which is in contact with the inner surface of the pipe 10, fixes the device along the axial line of the pipe and prevents the passage of the working fluid in the direction of the flexible hose.

 The proposed device operates as follows.

 The working fluid under high pressure (for example, 5-6 atm) through a flexible hose 3 enters through the shank 2 into the hollow body 1, and then through the nozzles 12 it enters the blades 8 of the turbine 7. When the turbine 7 rotates due to the displacement of its center of gravity relative to the longitudinal axis of the cutting elements 9 deviate from the center of the pipe and their cutting edges slide along the inner surface of the pipe, cutting off hard deposits. Cut particles of deposits are carried out by the working fluid flowing out of the nozzles 12 only in the direction of movement of the device, since The movement of fluid toward the flexible hose is prevented by the washer 11, which greatly simplifies the process of collecting and disposing of cut sediments. The device can move along the pipe being cleaned both by applying the necessary force to the flexible hose, and using, for example, a cable attached to the shaft 4 on the front of the cutting head.

Sources of information
1. USSR a. from. 338606, cl. E 03 F 9/00, 08 V 9/04, publ. 05/15/72.

 2. RF pat. 2003390, class 08 V 9/04, publ. 11/30/93 (prototype) about

Claims (1)

 A device for cleaning the inner surface of the pipe, comprising a hollow body with a shank for connecting a flexible hose for supplying working fluid, with a washer rigidly fixed to its outer side from an elastic material, the outer side of which is adjacent to the inner surface of the pipe, and rigidly attached to the body in the center of the front its parts by a shaft, a cutting head in the form of a turbine connected by a bearing to the shaft and equipped with blades with cutting elements rigidly fixed at the ends with rounded cutting edges they are turned in the direction of rotation of the turbine at an acute angle to the surface being cleaned, while the casing has nozzles directed towards the blades of the turbine, the center of gravity of the turbine is offset relative to the longitudinal axis to deviate the cutting elements from the center of the pipe, and the distance from the cutting edges to the surface to be cleaned and the center of gravity displacement is selected so that the edges of the cutting elements during rotation of the turbine slide along the inner surface of the pipe.