Backsound Art At present there is several technological procedures and devices for the realisation of these procedures for the removal of impurities which can be found mside and on the internal surface of pipelines used for transportation of gaseous media. The impurities can have mechanical character. for example residuals from the construction process of the pipeline system as welding electrodes. various metal subjects. etc.

In addition there are some impurities which are the consequences of abrasive processes at the contact of transported medium with the pipeline surface. condensates. technological impurities from compressor stations.

Devices used for the pipeline cleaning are principallv made a.s sliding mechanism in the pipeline with the utilisation of physical properties of media effecting the conespondincr mechanisms. They contain canting bodx where the cleaning elements are fixed. The structure and material of the elements corresponds to the cleaning method.

Among the most frequently used cleaning devices it is possible to include devices of the collar type where collars are the crucial cleaning elements. and their circumference surface is In the tight contact with the internal surface of the pipeline.

Thex are suitable for cleaning of pipelines from fluid impurities.

Magnetic cleaning devices are more universal in the case when cleaning elements consist of two assemblies, of collars and magnetic segments sulface of which is in the distance from the internal surface in the range between approximately 100 up to 200 mm, and it partially restricts the cleaning efficiency.

The structure of these devices determines the ability to remove from the pipeline, in addition to fluid impurities, also metal components of impurities. As the consequence of the fact that the device is adjusted to the rotation during the cleaning, and that is not equipped by the element for the breakage of the binding between impurities and the pipeline surface, especially in the case of higher adherence of impurities to the internal wall of the pipeline, lower cleaning efficiency can occur.

Cleaning devices equipped by the collars and brushes with metal bristles are comparativels widespread. The utilisation of brushes in the cleaning process on one side has favourable influence on the cleaning quality of the internal surface of the pipeline and, in fact, the equipment is able to clean the pipeline from all impurities but, simukaneously increases the load on the collar part of the equipment and it has negative influence on its wear.

The cleaning devices where the cleaning knot is created by collars and collars where the contact area with the pipeline wall is equipped by metal tips are utilised mains at the removal of thin impurities as for example. wax fi-om the crude oil pipelines. In this case it is special cleaning device and this is accompanied by higher financial costs for its manufacturing. Equally as in the case of the previous device, at higher clogging of the pipeline the collars are excessivelv loaded and therefore also worn.

Recent. cleaning devices are produced which. in addition to mentioned cleaning elements. are equipped by the regulator of sliding motion. The aim of this design is to optimise the speed of the devise. for example, in the dependence on the clogging extent or on the extent of the transpoltation of the transporting medium and to achieve higher cleaning quality b! that.

Cleaning devices consist of one, two, and sometimes three parts it means, they have character of hinged device. The two and three-part cleaning devices are suitable. above all, for smaller diameters of pipelines. Simple cleaning devices are used for bigger dimensions of pipelines. Common disadvantage of all mentioned devices is that they perform only sliding motion in the pipeline.

Disclosure of Invention Presented shortages are significantly reduced by the device for pipeline cleaning according to the invention. Substantially. it is adjusted for tight seating into the pipeline which is, simultaneously. rotating and sliding, and by that the possibility of helical motion of the device in the pipeline with the utilisation of physical operational properties of transported medium. The device is a shhcture made of carrying body which. in the motion direction. has a transfer port leading to the speed regulator of the sliding motion. The regulator is placed on the shield of the device. On the carrying body, particularly, on outside circumference walls, there are fixed individual parts of the device which can be dismounted. From these parts there are at least two caning and guiding parts, at least one sealing and scraping part. one is the brush part. one part is the main magnet. and one part is the mechanisms of the revolution and the guide. Each sealing and scraping palt. canting and guiding pails. and brush part have circular cross-sectional profile. The outside circumference of the magnet follows the internal circumference of the pipeline, and between these two circumferences there is a gap. Each sealing and scrapping part, cal inçg and guiding pails. are made of flexible material while the polyurethane is suitable one. The placement of caflying and guiding pails provides stabilisation of the der ice s motion with regard to its centre of gravity. the pails are arranged in the order in the direction from the shield of the device. canting and guiding part. at least one sealing and scrapping pail. the brush pail. the main magnet. the mechanisms of the revolution and the guide. and carrying and guiding part or the set of parts.

According to the invention the cleaning mechanistn will provide the removal of, practically. all kinds of impurities appearing in pipelines. either of metal origin as for example impurities arising from the abrasive wearing, impurities which remained in the pipeline systems in the stage of their construction, especially welding electrodes and their residual pails, iron scales. or other impurities as, for example condensates. The structure and mutual anangement of individual pails of the device come out from the motion function and, simultaneously. from the cleaning function of the device.

The individual ways of cleaning implemented in the device are logically bound each to other and create the prerequisite that already by one run of the cleaning device through the pipeline according to the invention the high standard of the cleaning will be achieved, and eventual repeated applications of the cleaning with the utilisation of the device which is subject of the protection have character of the check cleaning or the final cleaning according to the clogging rate of the pipeline.

Regulation of the devices speed, in the combination with the revolution of the device around its longitudinal axis. creates prerequisites for proper cleaning of the inter space of the pipeline at the achievement of practically balanced distribution of ferromagnetic impurities caurht on the device.

It results from the above mentioned that by the utilisation of the device which is the subject of the protection it is possible to achieve at least comparable quality of the pipeline cleaning with the quality which achieved by the use of existing devices at simultaneous sholtenino of the cleaning process.

Brief Description of Drawinrrs According to the invention the device for the internal walls cleaning is schematicalls outlined on the picture as the front view with the palatial cross-section.

Best mode for Canyin(r Out the Invention Concrete implementation of the device for cleaning of the iller side of the pipeline which is the subject of the protection comes out from the function of the integrated removal of metal, liquid, and other impurities from the pipeline. equally around the whole circumference. including the breakage of the binding between impurities and the internal pipeline surface.

Basically. the device is made of carrying body 1 made of metal material.

Around its longitudinal axis there is the transfer poil 1.1 leadinr to the speed reulator 2 of the sliding motion. The regulator is placed of the shield 1.2 of the device fixed to the canting bodv 1. The basic part of the speed regulator 2 of the sliding motion is created by stream oriented. over-pressure dimensioned exchangeable transfer nozzles 2. 1.

The outside surface of the carrving body 1 is variable. The variability is determined by the structure and the function of parts which are fixed on the external surface. The individual functional parts are an-anged and fixed to the body on the outside circumference of the carrying body 1 with the utilisation of dismantling joints. StaIting from the shield 1.2, in opposite direction of the device's motion. there are arranged in the order the carrying and guiding part 3. two sealing and scrapping parts 4. guiding and fixing collar 5. The brush pail 6. the main magnet 7, the mechanisms 8 of the revolution and the guide. the guiding and the fixing collar 5, two sealing and scrapping pails 4. the carrying and the guiding pail 3. the magnet 9.

The sealing and the scrapping palts 4 and the carrying and the guiding part 3, placed on the side of the device's shield 1.2 are individually inserted between flanges 1.3, and are fixed to them bv means of screws 10. while gaps between flanges are limited by distance elements it. The flanges are fixed to the carrying body 1. From the weight viewpoint the advantage is when the sealing and scrapping pails 4 as well as canyill(T and guiding pails 3 are made of composite reinforced polymer or other b! properties similar plastic material. Canvinrr and guiding pail 3 and sealing and scrapping pails 4 have outside circumference in the shape of the circle. From the viewpoint of the dimension the outside diameter of sealing and scrapping parts 4 enables their seating in the pipeline with the interference and bv that the tightness of the seating is provided. The outside diameter of the carrying and guiding pail z enables movable seating in the pipeline. From the structural viewpoint the advantage is to fix the carrying and guiding pails 3 as well as the sealing and scrapping pails 4 to flanges 1.3 by common screws 10.

The brush part 6 is fixed on the call.ino bodv 1. It is characteristic bv adequate flexible metal bristles fixed on the circumference of the holder. From the viewpoint of the efficiency of this function it is suitable if its diameter is adjusted for the seating into the pipeline with the interference. The design of his past is advantageous when sections of the bristles are used with various properties. It is sufficient for common operational conditions of the device if the brush part 6 contains two sections of brushes. The section placed closer to the shield 1.2 of the device contains. in relation to the bristles of the second sections bristles which are thicker, stiffer and have thinner structure of their distribution. The second section contains thinner bristles. more flexible. and with thicker structure of their distribution.

The following palt in the order which is fixed on the calling body 1 is the main magnet 7. The magnet. by its outside circumference. follows the internal circumference of the pipeline while between these two circumferences the gap is created and the outside circumference of the main magnet 7 is in the shape of the n- angle. From the viewpoint of properties it is necessary that the magnet and its placement. especiallv its distance from the brush part 6. secures his dominating attractive forces in the space of the main magnet 7 which provide entraininç even those smallest fen-omarmetic impurities fi-om the inside wall of the pipeline.

Behind the main marmot 7 on the canvinr bodv 1 there is fixed the mechanisms of the revolution and the guiding. It consists of spring-cushioned arms equipped bx small wheels and arms. b; their precisely dimensioned pressing forces interacting with the pipeline. provide revolution of the device. Behind the mechanisms 8 of the revolution and the guiding there are arranged fixing and guiding collar 5 as well as carrying and guiding pail 3, or fixing and guiding collar 5 and the set of pails which consists of various combinations of these pails: carrying and guiding pail 3, sealing and scrapping pail 4. the brush pail, and the magnet 9. It is advantageous to assembly the set with the following parts arranged in the order <BR> <BR> <BR> <BR> and placed in the direction from the shield 1.2 behind the mechanism 8 of the revolution and the guiding: the carrying and the guiding pail 3 - two sealing and scrapping pails 4. carrying and guiding pail 3 - the brush pail. in the order the magnet 9 - the carrying and the guiding pail 2 in picture the unmarked brush part - the carrying and the guiding part 3 - the sealing and the scrapping pail 4, in the order the magnet 9 - two sealing and scrapping pails 4 - the carrying and the guiding part 3. or the magnet 7.9 - the carrying and the guiding part 3 - two sealing and scrapping parts 4, magnet 9 - the non-pictured brush pail - at least one sealing and scrapping part 4 - the carrying and the guiding part , or the magnet 9 non-pictured brush part - the carrying and the abiding part 3, and two sealing and scrapping parts 4. From the viewpoint of the structure and the function it is advantageous if the carrying and the guiding part 3. and the sealing and the scrapping parts 4 from the set of parts are inserted between flanges 1.3 with gaps limited bv distance elements li squeezed bv means of common screws 10. From the viewpoint of the adjustment of parts for the seating into the pipelines the carrying and the guiding parts 3. the sealing and the scrapping pails 4. the non-pictul-ed brush pails have circular circumference. while the carrying and the guiding pails 3 are adjusted to the movable seating into the pipeline. and the sealing and the scrapping parts 4 are adjusted for the seating into the pipeline with the interference. and by that the tightness of the seating is provided.

The diameter of the non-pictured brush pail corresponds to the inside diameter of the pipeline with the interference. From the material viewpoint it is advantageous if each carrying part 3. and the sealing and the scrapping parts 4 from the set of pails are made of polyurethane or other material with similar propelties. the non-pictured brush pail can be constructed similarly as the brush part 6. From the function viewpoint of this part, at its combination with the magnet 9 the physical phenomena are respected which are similar to the case when the main magnet 7 and the blush pail 6 are combined.

From the viewpoint of the device motion it is designed in the way that it is balanced with the centre of gravity and creates conditions for the stabilised motion of the device.

The design of the carrying and the guiding pails 3 as well as the brush pails created of segments is velv adx antasTeous. The device consists also of other elements. These elements are used at the manipulation and the transportation of the device. at the repair works and the maintenance. at fixing of the position in the pipeline. at prevention of the device damage. For this purpose the device contains lifting eyes 12 fixed to the carving bodv 1. then the bumper 13 placed on the shield 1.2 and hanged to it. Further-. it contains auxiliary parts 14 which ca be utilised at the insertion of the device into the pipeline and at its -extraction from it. In addition, the device is equipped by signaling equipment which is not shown on the picture and is used for the signalling of the device's position m the pipeline. and by the instrument for the measurement of revolutions of the device. These tool are placed in the protected space. Above mentioned fixing guiding collars 5 are used for the manipulation with the device at the back side of the device and for its maintenance. and by means of them and some auxiliary' equipment, for example supporting stands, it is possible to fix the device at its transportation. or at the assistance of the stand's rollers to turn the device at the maintenance and repair works.

The function of the device which is the subject of the protection lays in it that the device is inserted into the trunsportation pipeline during the operation and its motion is provided with the utilisation of physical properties of nanspolted medium. for example. the gas pressure. The longitudinal hole of the carrying bod 2 is filled b« medium where it develops pressure on its front pail in the direction of flow.

Equally. in the direction of the flo\ it pushes on noses of parts fixed on the outside surface of the carrying body' 1. as for example. sealing and scrapping pails 4. In the case of sealing and scrapping parts 4, or the carrying and guiding parts arranged in the area of the device's shield 1.3. the medium inlet to noses of these pails is provided by means of the longitudinal holes 1.1 of the carrying body 1 with the utilisation of axial holes, while such brought medium acts in the direction of the device's motion.

The interconnection of the continuous longitudinal hole 1. 1 with the speed regulator 2 of the motion enables to set the speed of the device's motion with the utilisation of the mutual dependence of the hole size on nozzles 2.1 and the pressure difference between sources of the pressure of the transported medium. for example, in the case of gas behnieen compressor stations. The orientation of the nozzles' discharge 2. 1 and their size is provided b! the flow of the gas through nozzles 2. 1 which disturbs the adhesion of impurities to the walls of the pipeline and such released impurities are pushed in front of the device with the utilisation of functional properties of the carrying and the guiding part 3. and the sealing and the scrapping parts 4. In teclmological spaces of the pipeline the transfer of these impurities occurs into the technological places, while. consequently'. the impurities of the metal character are collected fi-om these spaces bx means of the brush part 6 and the main magnet 7.

The function of the brush pail 6 and brush pails generally is to clean mechanically the internal surface of the pipeline and. simultaneously. bring impurities into motion and into the position which enable. by the resulting effects of magnetic forces in direction to the main market 7. to catch efficiently the metal impurities and to transfer them into the final place of the cleaning.

The design of the brush pan 6 contributes siginficantly to the efficiency of this function of the device which is characteristic b! two sections. The section with thicker. less flexible and less elastic bristles in thinner structure of the distribution. arranged froin the side of the device's shield 1.2 perfonns rough cleaning. The second section contains more flexible bristles. which are thinner and have higher density of the distribution. and provides final cleaning of the internal surface of the device and. simultaneously, releases the adhesion of impurities to the internal surface of the pipeline. creates conditions for efficiency of the attractive forces of the main magnet 7. and by that also efficiently entrains metal impurities and causes their adhesion to this magnet. From this viewpoint it is advantageous to place the brush pail 6 into the magnetic field of the main magnet 7.

The function of the main magnet 7 is to attract metal impurities and to keep them in this position up to the termination of the cycle in the cleaning process. From this viewpoint the structure of elements providing magnetic cleaning respects magnetic phenomena around the magnet as for example magnetic induction, and properly' eliminates negative influence of these phenomena on the cleaning process.

Sufficiently big gap between outside circumference of the main magnet 7 and the internal surface of the pipeline creates space where the big volume of impurities can be caught. The mechanism 8 of the revolution and the guide of the device provides the revolution of the device, and as the consequence of that the device makes helical motion. The advantage of this way of the motion is that, on one side, provides balanced cleaning of the surface for example by the brush part 6. and on the other side, provides balanced abrasion of pails. Other contribution of the device's revolution is more balanced distribution of impurities caught on the surface of the main magnet 7 or the magnet 9.

The function of the carlz!ing and guiding pails 3 is to equally transfer the load caused b the device's weight to the pipeline and, simultaneously. to provide fluent guiding of the device during the motion in the pipeline. The mechanism 8 of the revolution and the guiding fulfils. in addition to the device's revolution. also the function of the guiding facility in the pipeline.

The function of the set of pails. arranged with regard to the direction of the motion at the end of the device. is the further increase of the cleaning efficiency'.

The individual pails of this set practically' fulfil the same functions as the parts an-anged in the front pail of this device. industrial Applicabilitv The devices for cleaning of the internal surface of the pipeline is especially suitable for cleaning of gas pipelines with bigger diameters of the pipeline.

However. after smaller adjustments. it is possible to expect also the utilisation for crude oil pipelines, or for cleaning of pipelines which are used for the transpoltation of other kinds of media.