The device for the study of corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipeline

 

Usage: the invention relates to a device for the study of corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipeline by injecting chemicals into the stream pumped through the pipeline environment and can be used in the chemical, oil and gas industry, in transportation systems. The inventive device includes a housing, a cavity which communicates with the cavity of the pipe, mounted on a shut-off valve installed on the outlet pipeline, collapsible column rods installed with the possibility of axial movement and fixation in the body of the seal, having at the lower end of the holder with the sample witness, on the upper crown block, the actuator mounted on the housing associated with the column, rod clamp. The actuator is made in the form of two cylinders, one end of the sleeve is United with the body on different sides, the other end of the rod - seclineframe clamps with a controlled limiter jamming mounted on the column of bars and paired her with the possibility of movement along it. When the pneumatic cylinders are located along the axis of the housing at a distance not less than the sum of d with the cavity of the housing and the cavity of the pneumatic cylinders, the candle is provided with a block of the pneumatic valves. Holder length equal to the inner diameter of the pipeline, is a continuation of the bottom of the hollow rod of the column and is made in the form of a pylon with debouncedelay aerodynamic shape of the cross section in the middle which has a control plate sample, and on the lower end thereof with the ability to swing around an axis parallel to the axis of the pipeline, one end of the fixed sample witness, made of several different-sized by the length of the strips of material of the pipeline, testcasecity between them along, in the form of a pre-curved in the manufacture of springs curved outer surface, the most educated long strip, the radius of which is equal to the inner radius of the pipe, closely without gaps against the inner surface of the pipeline. The other end of the witness samples are located between the limiting rollers mounted in the cavity of the lower rod, zapasovany in directing movement grooves rod fixed with the ability to swing around an axis parallel to the axis of the pipeline, the cylinder rod of the pneumatic cylinder, built-in bar and communicated with the air valves channels through the column rods, with sealing in places ixation. Moreover, the cylinder rod their projections zapasowa into the guide grooves of the rod, and the front in the course of flow in the pipe flange of the witness sample is from the inner side of the bend chamfer at an angle not more than 30to the inner surface of the pipeline. The technical result - the creation of a device for the study of corrosion, ensure the installation of the sample in the pipeline using the potential energy of the compressed medium in the pipeline, safety, quality and efficiency of research works on the measurement of corrosion. 9 Il.

The invention relates to a device for the study of corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipeline by injecting chemicals into the stream pumped through the pipeline environment, in particular by spray application of corrosion inhibitors on the internal surface of pipelines transporting gas with chemically active components, and can be used in the chemical, oil and gas industry, in transportation systems.

Known witness samples for research into the corrosion of pipelines (SU/s otrezanovo along the axis, with elastic compliances under the action of radial forces and isolated by the outer surface so that the areas along the section line is not covered.

The disadvantage of this witness sample is the need to shutdown and dismantling of the pipeline to extract a witness sample order of receipt of results.

Known witness samples for research into the corrosion of pipelines (SU/s 868435; MCI G 01 N 1/28; G 01 N 17/00, 11.01.1980 g), made in the form of a strip with an insulating coating on the outside surfaces having a radius of bending of the work area, equal to the radius of the investigated pipe, in the form of a loop attached at both ends of the retaining rod.

The disadvantage of this witness sample is the inability design of the witness to conduct research side and the upper part of the inner surface of the pipeline, which is very important in the study of aerosol processing by chemical pipelines.

A device for descent-ascent control and measuring instruments and samples in the current pipeline (RU patent No. 2098715; MCI 6F 17 D 3/00, 23.07.1996, including the corps, posted on installed on a Christmas shopping at Macy's samples and instruments and seal associated with the drive as removable winch, with the base mounted on the body, which is fixed to a dead end of the rope, ratchet with a pawl mounted on the axis of the drum, and a crown block mounted on the hull, through the roller which spanned the dead end of the rope, and the stem is made in the form of a rod column with radial openings in the upper part of each rod, with the upper end of the column bars connected to the crown block, and on the upper end of the body has a radial hole to accommodate and bar hole located in the housing cavity, the lock.

The known device has the following drawbacks:

- it is possible to study the lateral internal surface of the pipeline;

- used outside source of energy (muscle energy work) to carry out the operations running, lifting column bars when available potential energy of the compressed medium in the pipeline;

- the maximum size of the sample perpendicular to the axis of the column bars may not exceed the diameter of the bore hole shutoff valve, so that when the wrap holder flow environment formed distortion currents flow, affecting the reliability of the results of the study the body in the surrounding space and with a 100% probability of destruction of the elastic seal elements;

is not provided by the design of the device the drain to atmosphere in compliance with the remnants of a compressed environment after closure of the shutoff valve from the chassis before removing the device.

The known device closest to the technical essence and the achieved results to the claimed invention.

An object of the invention is a device for studying corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipeline, the construction of which provides a study of the top, side, bottom part of the inner surface of the pipeline, within 180around the circumference of the pipe, using the potential energy of the compressed medium in the pipeline for implementation of processes running, lifting rods, installation of the specimen in place and retrieve it, as well as safety, quality and efficiency of research works on the measurement of corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipeline.

An example of the technical result of the invention is the ability of the device to carry out a smooth stepovogo, during the study, tightly attached to the inner surface of the pipeline in an arc with an angle around the circumference of more than 180.

If this band does not impact significantly on the picture of the current near-wall layer of flow in the pipeline. Pressure in the pipes can reach significant values up to 8 MPa or more, so when the device is experiencing significant mechanical effort to overcome the most rational by using the potential energy of the compressed in the pipeline environment, which can be used as a working agent in the pneumatic actuator. Inevitable in this case, the emissions environment should be implemented through a candle to guide emissions into atmosphere, the wind, the safe altitude above the earth's surface, to prevent the creation of a localized volume of air mixed with the discharged medium, can cause an explosion or massive detrimental effect on the wildlife.

The technical problem is solved in that the device for the study of corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipe, comprising a housing, a cavity which communicates with the cavity line the Tang, installed with the possibility of axial movement and fixation in the body of the seal, having at the lower end of the holder with the sample witness, on the upper crown block, the actuator mounted on the housing associated with the column rod, latch, according to the invention, the actuator is made in the form of two cylinders, one end of the sleeve is United with the body on different sides, the other end of the rod - seclineframe clamps with a controlled limiter jamming mounted on the column of bars and paired her with the possibility of movement along it, when the pneumatic cylinders are located along the axis of the housing at a distance not less than the sum of the two strokes of the piston rod of the pneumatic cylinder and the width of the clip, in addition, the actuator is equipped with a block of pneumatic valves communicated with the cavity of the housing and the cavity of the pneumatic cylinders, spark plug provided with the unit air valves, and the holder of length equal to the inner diameter of the pipeline, is a continuation of the bottom of the hollow rod of the column and is made in the form of a pylon with debouncedelay aerodynamic shape of the cross section in the middle which has a control plate sample, and on the lower end thereof with the ability to swing around an axis parallel to the axis of the pipeline, fixed water, rigidly interconnected along, in the form of a pre-curved in the manufacture of springs curved outer surface, the most educated long strip, the radius of which is equal to the inner radius of the pipe, flush with no gaps against the inner surface of the pipe; the other end of the witness samples are located between the limiting rollers mounted in the cavity of the lower rod, zapasovany in directing movement grooves rod fixed with the ability to swing around an axis parallel to the axis of the pipeline, the cylinder rod of the pneumatic cylinder, built-in bar and communicated with the air valves channels through the column rods, with seals in their screwing and through the crown block, coupled with the established in the study on the case of an adjustable clamp, and the cylinder rod their projections zapasowa into the guide grooves of the rod, and the front in the course of flow in the pipe flange of the witness sample is from the inner side of the bend chamfer at an angle not more than 30to the inner surface of the pipeline.

The invention is illustrated in the drawings: Fig.1 - General view of the device; Fig.2 is a longitudinal cross-section A-A; Fig.3 - the cross of the axis of symmetry; Fig.5 - section G-G across the coupling with the rod; Fig.6 - section D-D on the liner of the coupling; Fig.7-cross section e-E coupling on limiters; Fig.8 is a cross section W-W across the sample witness; Fig.9, a side view And on the device.

The unit consists (see Fig.1, 2, 3, 8) from the housing 1 seal 2, mounted on the shut-off valve 3 mounted on the removal of the existing pipe 4, the cavity 5 of the housing 1 reported thus with the cavity of the existing pipe 4.

In case 1, tightly, with the kinematic (allowing movement without distortions only strictly-axis) clearance, with the possibility of axial movement and fixation set column 6 bars 7, svininih on the threads to each other. At the upper end of the column 6 has a crown block 8 (see “New Polytechnic dictionary.- M: BDT, 2000 from it. Krone - crown; block - part of the mechanism that represents a set of functionally integrated components), on the lower holder 9 with the sample witness 10 and the control plate sample 11 in the middle. Length Ldthe holder 9 is equal to the inner diameter DEXT.Trpipeline 4. The control plate sample 11 is made of a material of the pipe and serves to objective calibration assess the impact of active factor columns 6 and is made in the form of a pole with a cross-section debouncedelay aerodynamic shape, in order to reduce the disturbance of the process flow of the pylon flow into the existing pipeline 4 at the picture of the current flow in the place of study in order to minimize the negative impact of violations of the currents on the validity of a study. At the lower end of the holder 9 is fixed with the ability to swing around an axis parallel to the axis of the pipe 4, the lower end of the witness sample 10. Sample witness 10 is a spring that is pre-curved in the manufacture by welding or riveting along with each other several different-sized in length, pre-bent strips of material of the pipe 4. External bend radius equal to the inner radius of the DEXT.Tr/2 line 4. Raznolikosti along the length of the strips collected in the spring, due to the desire to achieve this form of bending it under the action of longitudinal eccentric efforts (with the loss of the initial spring, provided in advance in the manufacture, bending shape due to the application of random loads that cause bending stresses in excess of the value of the limit of proportionality of the material) to the outer surface of the spring formed by the long strip, took the form of district cavity of the rod 12, zapasovany into the guide grooves 15 of the rod 12, is secured with the ability to swing around an axis parallel to the axis of the pipe 4, to the head 16 of the piston rod 17 of the cylinder 18, a built-in rod 12. The head 16 with its lugs 9 also zapasowa in the grooves 15. The cavity of the pneumatic cylinder 18 channels 20 in the rod 12, 7 resealable seal 21 in places screwing rods 7, 12 in column 6 and the crown block 8 with them, through the crown block 8, flexible pipes 22 communicated with the air valves 23, pipe 24, in turn, communicated with the cavity 5 of the housing 1 and the pipe 25 with the candle 26. The radii of the roller 14, the deflection R stepping-stone grooves 27 15 should be the maximum extent to allow the diameter of the rod 12, so that the bending stress when possible forced bending of the witness sample 10 in these places did not exceed the limit of elasticity of the material of the witness sample 10. Anchor stone 27 to reduce friction made of Teflon f-4.

The front edge of the witness sample 10, closely adjacent to the inner surface of the pipeline in the study performed with chamfer “k” angle30to the surface of the pipe 4 for the minimi is and Z, and the thickness t of the witness sample 10 is determined by the diameter of the rod 12, which is selected in turn according to the diameter DEXT.Trpipeline 4.

To move the column with 6 bars 7 and 12 with the holder 9 and the sample witness 10 into the cavity of the pipe 4 with overcoming the efforts of the buoyancy of the column 6 of the compressed medium into the existing pipeline 4 friction force convoy about 6 seal 2 required the application of considerable efforts along the column 6, in practice up to 3 i.e., To accomplish this, a drive (see Fig.4, 5 6, 7, 9) two pneumatic cylinders 28, one end of the fixed on the housing 1, the other rod 29 on seclineframe the clamps 30, mounted on the column 6 are longitudinal in column 6 movement and fixation. To provide reciprocal movement of the clamp 30, the pneumatic cylinders 28 on the housing 1 are separated from each other by a distance L2S+N, where S is the stroke 29, H - the width of the clamp 30. The cavity of the pneumatic cylinders 28 reported flexible pipelines 31 to block air valves 23. Unit air valves 23 serves to control the operation of the pneumatic cylinders 18, 28 and pits the inevitable when it discharges waste into the cylinders 18, 28 environment from pipeline 4 in the candle 26, which scatters them to the wind in the atmosphere at a safe height above the ground.

The clamp 30 VK is CA. The working surface of the liner 32 and the clamp 30, the mating surface of the column 6, lined with durable elastic material with a high coefficient of friction on polished steel rods 7, 12 column 6, for example, rubber or polyurethane high hardness. This is done not only to increase the friction force of the clip 30 on the column 6, but in order not to damage the surface of the column 6 so as not to destroy, otherwise, the elastic seal elements 2 and to provide maximum sealing gasket 2 pair case 1 - column 6.

The liner 32 is mated with the two shoulders of the Cam 35, one arm of which is eccentric 36, the other arm 37 is connected by axle 38 with the rod 29 of the cylinder 28. The Cam 35 swinging on an axis 39 that is installed in the yoke 30. The size of the eccentricity e of the eccentric 36 and “l” lever 37 connected by the relation le/f, where f is the coefficient of friction of the clamp 30 on the column 6.

To ensure the idle return movement of the clip 30 are constant limiter 40 for a case of moving the clamp 30 up the column 6 when introduced into the cavity of the pipe 4 and the controlled limiter 41 for the case of movement of the clip 30 down the column 6 when it is extracted from the cavity Tr placed in the circular groove 42 of the Cam 35 and is installed in the yoke 30. The stopper 41 has a drive 43: manual or mechanical depending on the availability of system of automatic control of the operation of the pneumatic cylinders 18, 28. The width H of the clip 30 is selected depending on the diameter of the column 6 of such size to provide free without spontaneous jamming the movement of the clip 30 on the column 6 of the slide along the rail at idle passages of pneumosintes 28. After the introduction of the column 6 in the cavity of the pipe 4 and the installation of a witness sample 10 in place of the column 6 is fixed in the axial direction by use of an adjustable inventory latch 44 attached to the housing 1 at one end, the other to the crown block 8. The latch 44 is set at the time of the research, which can last up to several dozen or hundreds of hours, because the laying of the execution of the function of fixing columns 6 to promotility 28 and the clamp 30 is irrational from the point of view of safety in the study.

The device operates as follows.

Case 1 seal 2 and the inserted column rods 6 are mounted on a closed shut-off valve 3 on the removal of the existing pipe 4. The pneumatic cylinder 28 is permanently installed on the housing 1, is connected to the clamp 30 on the column 6 and communicated with the block pscom witness 10 and the control plate sample 11 is placed in the housing 1. The shaft 17 of the pneumatic cylinder 18 is retracted inside. To implement this block air valves 23 should be connected to the pipeline 4 in addition occupied by the removal device or to an independent source of working agent, chemically neutral or similar environment in the pipeline 4. Sample witness 10 retracted into the cavity of the lower rod 12 is in the off position 45. The length of the column 6 is chosen in advance by screwing the required number of rods 7. You can increase the length of the column 6 and in the process, but since the channels 20 filled with the working agent must be installed on both ends of each rod 7 and 12 on each channel 20 pneumotach, the locking channels 20 when unscrewing the rods 7 and 12 from each other and opening channels 20 screwing. This complicates the design and can be performed in case of execution of the device if necessary research pipeline 4 in various places in the absence of data necessary for determining the specified length of the column 6.

You can set the length of the column 6 with a guaranteed margin in length. But it is also possible, and the absence in these places, points of connection to the pipeline 4 in addition to drainage and independent sources working agent. In this case, the action is and he or otryvnoi control pit, then calculate the required length of the column 6 and is screwing the required number of bars 7 and 12, before this special tool type long threaded rod on the end is retracted inside the cylinder 18 of the shaft 17, to which the tool through the Central hole of the rod 12 is screwed into the specially provided for the screw hole on the piston end of the rod 17. 12 bar with holder 9 and the sample witness 10 in position 45 is inserted into the housing 1, and the tool is removed from the rod 12. Screwing rods 7, 12 in column 6 is the tool type key chain pipe GOST 19826-V with additional elastic friction facing working surfaces of the key, ensuring the safety of the polished surface of the rods 7, 12. After that, the housing 1 with the inserted column 6 is mounted on the valve 3 and column 6 is fixed by a clamp 44. Opens the valve 3 and the environment from the pipe 4 enters the unit air valves 23. Then one of the pneumatic cylinders 28 are jamming clamp 30 on the column 6 and the perception of the axial force of the column 6. The latch 44 is removed, the unit is ready for operation. This procedure is applicable in all cases. Alternate action Osnovaniya the lower end of the holder 9 with the wall of the pipeline 4. When one of the pneumatic cylinders 28 carries the bar down, the other at this time, the idle raises the clamp 30 to 6 bar up and Vice versa. During this operation the controlled limiter 41 is extracted from the circular groove 42. When the movement of the rod 29 of the cylinder 28 down the Cam 35 is rotated and the eccentric 36 presses the liner 32 to the surface of the column 6 with a force that creates the friction force of the clamp 30 and liner 32 of the column 6, and exceeding the value of the axial force of the column 6. Then there is a jamming of the clip 30 on the column 6 and this ensures the working stroke of the pneumatic cylinder 28. When the movement of the rod 29 up the Cam 35 is rotated to the stop limiter 40 to the end of the circular groove 42, and the clutch 30 rasklinivanie and moves up the rod 6. This ensures that the idle speed of the pneumatic cylinder 28.

When removing the column 6 of the cavity of the pipeline 4 pneumatic cylinder 28 alternately, in the same way when lowering the column 6, win pushed out of the cavity of the pipe 4 by the pressure of the medium column 6. In this case, the jamming clamp 30 on the column 6 is due to the rises efforts of the pneumatic cylinder 28 during its working stroke up. Idle pneumatic cylinder 28 down is ensured by the fact that the clutch 30 in the slot of the Cam 35, not allowing in this case, the eccentric 36 to press the liner 32 to the column 6. When working stroke of the pneumatic cylinder 28 controlled limiter 41 is withdrawn from the circular groove 42, releasing from the locking Cam 35. The pneumatic cylinder 18 under the control block air valves 23 the upper end of the witness sample 10 is fed down. The upper end of the witness sample 10 moves together with the head 16 of the piston rod 17 of the cylinder 18 in the guide grooves 15 of the lower rod 12 and is pushed between restrictive rollers 13, 14 in the cavity of the pipe 4, where the sample witness 10 begins to take the form of a bend, laid and fixed during fabrication, bending of the elongated non-working position 45 in the working position 46. Sample witness 10 almost independently, elasticity, and strives without exposure to the air cylinder 18 to occupy a working position 46. This is facilitated by the lifting force acting on the sample witness 10 in the direction of the surface of the pipeline 4 arising under this model the influence of the environment around the witness sample with the angle of attack of the flow on the leading edge of the30. At the last rest of the way for installing the exemplary surface and under the force of the pneumatic cylinder 18 is directed produces a force pressing the witness sample 10 to the inner surface of the pipeline 4. The radius R of the bending of stone 27 is selected such size that when bending it the upper end of the witness sample 10, is fabricated as a multilayer of different size along the length of the strips of the spring, the deformation of the bend does not exceed the elasticity limit and was reversible. This is necessary when using the witness sample 10 to determine the effectiveness of treatment chemicals inside surface of the pipe 4, to ensure multiple application. This is necessary in the study of corrosion there. The upper end of the witness sample 10 is formed of only the longest strip springs. The radius R of the bending of stone 27 should be not less than 15 times the thickness of the strip (see “Handbook of designer-mechanical engineer”. Century. And. Yuriev, Volume 3, Chapter II. - M.: Mashinostroenie, 1980) to Flexural deformation remained within the limits of elasticity. But even otherwise, the construction and cooperative arrangement of the rollers 13, 14, grooves 15 stone 27 provides statement of the witness sample 10 in the working position 46 under the force of the pneumatic cylinder 18.

Sample witness 10 tightly against the inner surface of the pipe 4, having a leading edge chamfer “k” angle

reasons for accommodation in the area Ltothe housing 1 is not only the holder 9, and the tail of a witness sample 10 in the form of a loop of lengthformed by compression, in the case of failure of the pneumatic cylinder 18 and the impossibility of retracting the upper end of the witness sample 10 into the cavity of the rod 12, column 6 on the edge of the hole of the exhaust pipe 4. After removal of the holder 9 with the sample witness 10 from the cavity of the pipeline 4 valve 3 is blocked and the device is removed.

An example of a specific implementation of the device, use the calculation of basic structural dimensions of the device for investigation of corrosion or determine the effectiveness of treatment an inhibitor of corrosion of the internal surface of the pipeline 4 with a diameter of 720Select the diameter of the rods 7, 12 dimension dW=50 mm Valve 3 - Dy=50 mm, Based on design considerations the width of the witness sample 10 - Z, manufactured form springs from 5 different length strips of a thickness t of 0.4 mm from the material of the pipe 4, choose the size of 30 mm Diameter rod 12W=50 mm constructively allows the radius R of the bending of stone 27 is 25 mm, the Ratio R/t=25/0,4=62,5 4.2 times greater than the minimum allowed to prevent bending deformations outside of elasticity of the material. This obviously guarantees the absence of residual deformations. The thickness of the leaf springs 50,4=2 mm and the width Z=30 mm is quite provide aerodynamic stability of the witness sample 10 under the influence of the gas flow during the transition of the witness sample 10 from outside 45 46 working position.

The force of buoyancy columns 6 medium pressure P0=5.5 MPa from the cavity of the pipeline 4 is

Select the diameter of the cylinders 28 are equal, with a margin to overcome the friction in the seal 2, dC- 65 mm, the force of the pneumatic cylinder 28 in this case is equal 1555 kg. The diameter of the cylinder 18 selected on the basis of the tolerable e.g. the Z=30 mm

F1=SGZ10-1=250,43010-1=30 kgf.

This effort is enough to put a sample witness 10 working 46 and pulling outside the 45 position. When the application of this effort, the band never loses its stability from the longitudinal force of the pneumatic cylinder 18, as constrained from longitudinal bending of the guide slots 15, in which it moves. Upon exit from the slots 15, the strip is bent and leaning lateral surface on the surface of the deflection stone 27, slips it converts the direction of effort and passes it to the Central part of the witness sample 10, forcing it into position 46, and further firmly presses it against the inner surface of the pipeline 4.

The diameter DCthe pneumatic cylinder 18 according to the calculation is equal to

,

accept DC=10 mm

Length Ltoof the housing 1 for accommodating the holder 9 and the witness sample 10 is

accept Lto=1000 mm

Material of main parts of the device is selected alloy corrosion-resistant has become the Wallpaper difficulties: in the workpiece in the form of a pipe milled on the surface of the longitudinal grooves, then they welded closed by plates after welding, the workpiece is cut. The elastic part of the seal 2 and the sealing of the pneumatic cylinders 18, 28 are made of PTFE F4.

The instrument is used in practice will effectively, efficiently, and most importantly, with a high degree of accuracy to evaluate the results of the study of corrosion or effectiveness of treatment chemicals the inner surface of the existing pipeline, to carry out the introduction and extraction of the witness sample in the cavity of the existing pipeline using the potential energy of the medium, providing an adequate degree of safety.

Claims

The device for the study of corrosion and determine the effectiveness of treatment chemicals the inner surface of the existing pipe, comprising a housing, a cavity which communicates with the cavity of the pipe, mounted on a shut-off valve installed on the outlet pipeline, collapsible column rod mounted for axial movement and fixation in the body of the seal, having at the lower end of the holder with the sample witness, on the upper crown block, the actuator mounted on Korpusenko end - sleeve - United with the body on different sides, the other end of the rod - seclineframe clamps with a controlled limiter jamming mounted on the column of bars and paired her with the possibility of movement along it, while the pneumatic cylinders are located along the axis of the housing at a distance not less than the sum of the two strokes of the piston rod of the pneumatic cylinder and the width of the clip, in addition, the actuator is equipped with a block of pneumatic valves communicated with the cavity of the housing and the cavity of the pneumatic cylinders, spark plug provided with the unit air valves, and the holder of length equal to the inner diameter of the pipeline, is a continuation of the bottom of the hollow rod of the column and is made in the form of a pylon with debouncedelay aerodynamic shape of the cross section in the middle which has a control plate pattern on the lower end thereof with the ability to swing around an axis parallel to the axis of the pipeline, one end of the fixed sample witness, made of several different-sized by the length of the strips of material of the pipeline, testcasecity between them along, in the form of a pre-curved in the manufacture of springs curved outer surface, the most educated long strip, the radius of which is equal to the inner radius of ideal, located between restrictive rollers mounted in the cavity of the lower rod, zapasovany in directing movement grooves rod fixed with the ability to swing around an axis parallel to the axis of the pipeline, the cylinder rod of the pneumatic cylinder, built-in bar and communicated with the air valves channels through the column rods, sealed in their screwing and through the crown block, coupled with the established in the study on the case of an adjustable clamp, and the cylinder rod their projections zapasowa into the guide grooves of the rod, and the front in the course of flow in the pipe flange of the witness sample is from the inner side of the bend chamfer at an angle not more than 30to the inner surface of the pipeline.

 

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