Ship-pipelayer (options) and the method of laying pipes (options)

 

The invention relates to construction and is used in the construction of underwater pipelines. Ship-pipelayer contains the means of its promotion, the HSE established hinged tiltable relative to the vertical, the top of the tower forward in the intended direction of movement of the laying of the pipe and the bottom of the tower in the opposite direction, means lifting section of the pipeline from the deck one with the tower line, means coupling the specified section of the pipeline to the laid pipeline and lower launching ramp with rollers and installed with the possibility of the direction of the pipeline during its descent from the vessel. Derrick mounted in the bow of the ship. The vessel is equipped with means for the Assembly of pipe sections in a section of pipe of greater length, tension devices installed with the possibility of capture of pipeline laid and lowering it in the water while maintaining the desired tension in the pipeline, and at least one clamp mounted with the possibility of capture of the pipeline below the tensioning device. Expands the Arsenal of technical means. 8 C. and 22 C.p. f-crystals, 17 ill.

The technical field to which otnose water vessel.

The level of technology

Technology pipeline in the sea, mainly used up to the present time, known as laying in the shape of the letter S (S type) or S-laying. Briefly, this technology can be described as follows. Pipe sections are typically 12-meter length, is delivered from the port to the pipelay barge through the transport barges or ships and unloaded on the deck of the barge. These pipe sections are placed one after another along a mounting platform that is normally located horizontally, or in some cases has a slight tilt in 5-10(this platform is called the space capacity of the pipeline). To create a continuous pipeline on-site capacity at multiple work sites perform operations necessary to complete the connection of the pipe sections. When you add a new section, the barge moves forward and the pipe supported on the stern of the barge inclined trigger ramp (or floating stinger), is bent around the stern down to the seabed. The profile of the pipeline from the vessel's steering to the seabed has the form of a long letter " S " (where the term S-laying or the criminal code of the I reduction occurring in the hanging part of the pipeline stresses along from the ship-side booms to the bottom in the pipeline creates a constant tension with a tensioning device. There is a limit to the depth of the strip, which can be used this way. As the depth increases traction force, developed the tensioning device is required to maintain at an acceptable level of tension of the pipeline increases rapidly and, accordingly, increases the reverse pulling force acting horizontally on the part of the pipeline on the vessel-pipelayer. Mentioned efforts can be reduced by increasing the angle of descent of the pipeline into the water. If the angle is close to vertical (called "J-laying or laying pipe J-shape"), the value of the required tension of the pipeline is very close to the weight of the pipeline, the length of which is equal to the depth, and the horizontal component of the tension is close to zero. This way, on the contrary, inherent limitations, implying the presence of a minimum depth of application, because of the bending of the pipeline 90when it is laid on the seabed requires enough space, and if excessively abrupt bending of the pipeline tension in it exceeds permissible.

From U.S. patent No. 4068490 (the closest analogue of the invention) is known ship-pipelayer, using the principle of J-laying and containing means prodvinalco vertically by the top of the tower forward in the intended direction of movement of the laying of the pipe and the bottom of the tower in the opposite direction, tool lifting section of the pipeline from the deck one with the tower line, means coupling the specified section of the pipeline to the laid pipeline and lower launching ramp with rollers and installed with the possibility of the direction of the pipeline during its descent from the vessel. One disadvantage of the known composition of the vessel is the location of the tower inside the contour of the vessel, which complicates the control of underground pipeline in place, touch the ground, and completion of the pipeline on land.

Taking into account the above-mentioned problems, the present invention is a device capable of laying pipelines as very deep and relatively shallow depths, under conditions that do not damage the pipeline, and with high performance.

The invention

The object of the invention is a vessel-pipelayer containing the means of promoting the vessel for laying a pipeline; means the Assembly of pipe sections on the ship mostly in a horizontal position in the segment of pipe of greater length; tower mounted hinged in the area of the bow on the intended direction of the rise section of the pipeline from the deck one with the tower line, docking of these segments of the pipeline laid to the pipeline; a tensioning device for the capture of pipeline laid and lowering it in the water while maintaining the desired tension in the pipeline; one or more clamps for gripping the pipe below the tensioning devices; lower launching ramp with rollers, the direction of the pipeline during its descent from the vessel; and a means of monitoring the pipeline in place touching the bottom, mounted on the stern.

The object of the invention is also a method of laying pipes from a vessel using a tower, which is located near the fore part of the vessel for the intended direction of movement of the pipeline installation, the hinge attached tiltable relative to the vertical tip forward. On the ship mostly in a horizontal position periodically assemble pipe sections in a section of pipe of greater length, raise a segment of pipeline in one tower line, join a segment of pipeline laid to the piping, captured through the tension device and put it in the water to maintain the desired tension in the pipeline. The direction of the pipeline at the time it was you the minute vessel for pipeline in the place where falls to the bottom. Any interruption of the process of laying the pipeline capture at least one clamp below the tensioning device.

The placement of the tower (the ramp platform capacity of the pipeline) in the area at the tip of the bow (or front of the ship in the expected direction) with the provision of the respective tilt axis of the pipe towards the front of the boat greatly facilitates the process of supplying pipeline to the platform or other similar structure during construction, for example, S-shaped columns by a chain line. The end of the pipe can be freely lowered from the vessel using a winch for temporary lowering and lifting of the pipeline, and then stretched to the platform by one or more winches on the platform, there is no need to move the pipeline beneath the boat or take the vessel from its position between the end of the pipeline and platform. In addition, pipeline, sinking to the bottom, passes under the boat and point it to touch the bottom is pretty close from a point directly under the stern. This simplifies the observation of touch and control of the strip by means of a remotely controlled vehicle (ROV) pedeling ship observations. The monitoring tool pipeline can contain a vehicle remote control apparatus from the vessel.

The means of promotion of the vessel may include propellers, rotating with drive marine engines. In another embodiment, when used at relatively shallow depths movement of the vessel can be carried out by winches, ropes attached to the anchors, or similar method.

Thanks to the installation of towers in the area of the bow, and not in the middle of the ship, as suggested earlier, is released very large surface of the deck for storage of containers and pipes for connecting pipe sections. The advantage of the means of Assembly of the pipe sections is that they contain means of welding the four pipe sections in one segment of greater length, preferably by welding them in pairs and then connecting pairs. Thus, the vessel can get a standard 12,2-meter section and the tower to lift segments of length 48,8 m

The advantage is that the tower can be rotated between a vertical position and the position with an inclination of about 30forward. Tower can also be lowered with a slight angle to the horizontal for use as the trigger is awn disassembly for the implementation of S-laying at this end of the ship. Then the end of the vessel, which when J-laying is the nose, with S-laying may be stern.

The lifting means may include a cradle support for holding a segment of pipeline, pinned in the zone of the sole of the tower. Such a hinged cradle-feet may go up or down using the rope attached to the tower. It is desirable that the length of the cradle-support was approximately the same as the maximum length of the raised section of the pipeline, in this case a segment of the pipeline can be raised on the tower with lift.

The tool Assembly sections may contain the first working platform, equipped to perform the actual welding of the pipeline, and a second working space below the first at a distance of one section of the pipeline running non-destructive testing of the connection and final adjustments. Thus, it can be done welding a single connection, while the previous is controlled, which increases the speed of the pipeline. The second working space may be located between the tensioning device and clamps.

As a tensioning device can be used with the standard of the mouth of the I pipeline and provides unobstructed passage of the anode cathodic protection system, limiter coupling couplings, etc.

The said clamps can be fixed friction clamp and a movable friction clamp. Each of the clamps must be strong enough to withstand the maximum weight of the pipe, which can lay vessel, even if the pipeline will be filled with water.

In a preferred embodiment, the lower launching ramp provides means of controlling the loads acting on the pipeline during its passage through the rollers, and also has an adjustable curvature, in order to ensure the optimal degree of curvature of the pipeline according to the weight of the pipe and the depth of its installation under all possible operating conditions of the vessel.

In a preferred embodiment, the lower launching ramp contains the lower guiding device having several groups of rollers arranged at a distance from each other along the pipeline route and limiting the lateral limits of this route, and guide rollers are arranged in such a way as to allow some bending of the pipeline during its passage through the lower guiding device. Allowing bending of the pipeline during its descent from the vessel and adjusting the bending guide rollers reduce the horizontal forces, acting on the pipeline side of the ship pulling in different groups of guide rollers, so that the voltage generated by one particular group of guide rollers, are reduced.

Usually the preferred form of the guide rollers is cylindrical, but can be used clips from other forms and even can be used rotating grooves on some or all of the rollers, if necessary, for any reason.

In the preferred embodiment, guide rollers at least one group of rollers includes rollers, the axes of rotation which are inclined to each other in the plane perpendicular to the tower. In this case, the guide rollers surround the pipe at least part of a circle and thereby allow for some discrepancy between the position of the vessel and the tower, on the one hand, and a vertical plane passing through laying an underwater pipeline. In the preferred embodiment, guide rollers at least one group of rollers are located at least a quarter of a circle around the line of motion of the pipeline: this provides the possibility of divergence of approximately 90

In a preferred embodiment, the lower guiding device is made in the form of a funnel, the collapse aimed in the direction of travel of the pipeline during laying, camber angle, increasing in the direction of travel of the pipeline during laying. In this case, what would the plot of the sending device is used for the direction of the pipeline during laying, the pipe is given a controlled bending, as applied to the pipeline forces are distributed between the rollers of different groups.

Although the scope of patent claims this invention allows for the use of guide rollers and to create some tension pipeline, in the preferred embodiment, guide rollers are installed with the possibility of free rotation, resulting in the only force acting on the pipeline side of the guide rollers is shear force.

In predpochtitelnye, mounted on an elastic suspension (with the possibility of the elastic displacement) directly or through other elements. An advantage of the invention is that the malleability of the guide device is provided by mounting the rollers on an elastic structure with the ability to change the position of the axis of rotation of the roller, and not, for example, due to the elastic design of the roller, resulting in a change in the effective direction of the rollers. Each roller can be installed separately on its own elastic suspension, however, it is preferable to install the whole group of rollers on one elastic structure, providing elastic displacement.

The bottom guide is primarily required for the laying of relatively rigid pipe, as opposed to, for example, pipelines are so soft that it can be coiled during storage. It is desirable that the bearing resistance of the elastic displacement (stiffness elastic suspension with elastic deformation) exceeded 100 kN/m, and even better 500 kN/m In the following embodiment, a resistance shift is of the order of 5000 kN/m for some top groups of the rollers and of the order of 1000 kN/m for navset more than 50 mm, and at least some of the bearings are elastic displacement of more than 100 mm In the following embodiment, a displacement of the upper group of rollers with resistance to offset of 5000 kN/m may be 100 mm, and the offset of the lower group of rollers with resistance 1000 kN/m may be 300 mm

It is clear that the amount of flexure attached to the pipeline during its movement through the lower guiding device can be small. One of the objectives of imparting bending is the uniform distribution between the groups of rollers horizontal forces acting between the guide rollers and the pipeline. In an embodiment of the invention described below, the amount of bending of the pipeline is about 0.34 m 10 m of pipe length; in this embodiment, the full force operating under normal conditions with the lower guide device is about 1000 kN.

The inclination of the tower during operation is from 45 ° to 90 ° to the horizontal.

In the preferred embodiment, along the route of the pipeline under water there are three or more groups of rollers, and even better five or more groups of rollers. In a preferred embodiment, some groups of rollers installed along the route Truboplast, even above the axis of the hinge tower. In a preferred embodiment, the group of rollers spaced relative to each other along the pipeline route is approximately evenly. The interval between adjacent groups of rollers along the pipeline route can be from 2 to 15 m, and even better from 3 to 10 meters In an embodiment of the invention described below, the interval is 5 m

In a preferred embodiment, the vessel also has controls a force applied to the pipe to the rollers of the lower guide device. It is preferable to install multiple means of control forces together with the relevant groups of guide rollers for controlling the forces applied to the pipeline by the relevant groups of the guide rollers. Controls can contain one or more torque elements.

In the preferred embodiment, control is provided a force applied to the pipeline by one or more guide rollers, and control of the vessel is carried out depending on the inspection results.

It is obvious that the above vessel-pipelayer has many technical advantages, the implementation of which in the aggregate can achieve the best financial p the TV, what will be described in more detail below.

The first technical advantage of the invention relates to the installation of towers in the area at the tip of the bow, making laid the pipe is surrounded by a vessel in the area of the hull, i.e., provided the removal of pipeline laid for the contour of the vessel. Thus, in the first aspect of the invention relates to a vessel-the pipe layer containing the means of promoting the vessel for laying a pipeline; the tower, installed in the area of the bow on the intended direction of movement and is secured pivotally tiltable tip forward; the means of raising section of the pipeline from the deck in one tower line; means coupling the specified section of the pipeline laid to the pipeline; however, the HSE established in the area at the tip of the bow. Similarly, in the first aspect, the invention also relates to a method of laying pipeline from a vessel using a tower that is installed in the area of the bow on the intended direction of movement and is secured pivotally tiltable top. Segments of the pipeline periodically lifted from the deck of the ship in one to rig a line and on the ocher what ina tip of the bow, thereby making laying the pipeline in the area of the hull beyond the contour of the vessel.

A second technical advantage of the invention concerns the use of two working platforms, pipe joints, spaced along the tower in the distance of one of the assembled section of the pipeline. This location gives during pipe-laying ability to perform two different operations - the connection of pipes and/or inspection of pipe joints, resulting in every joint is less work on each of the two sites. Therefore, the time during which the joint must remain in place for the conduct of its work can be reduced. Thus, in its second aspect the invention relates to a vessel-the pipe layer containing the means of promoting the vessel for laying a pipeline; a tower mounted on the vessel; the upper area pipe connections located at the top position along the tower; means lifting section of the pipeline from the deck in line with the tower with the location of the lower end section of the pipeline mainly at the level of the upper platform pipe joints; lower the platform pipe joints located in the lower position along the tower at a distance from the top platform connection truama pipeline, set in the area of the upper and/or lower platforms. In a preferred embodiment, the lifting means of the segment of the pipeline includes the first installation tool of collected segments of the pipeline in one with the rig line and the second tool lifting segments of the pipeline along the tower. In this aspect, the invention also relates to a method of laying pipeline from a vessel using a tower that is installed on a ship with the deck of the vessel periodically raise the segments of the pipeline in line with the HSE and join them with the laid pipeline. The rig will be equipped with upper and lower sites of the connection pipes and the coupling segments to the laid pipeline carried out on the upper and/or lower floors of the connection pipe, and the platform pipe joints located at a distance approximately equal to the length of one section of the pipeline. In the preferred embodiment, each stage of the lifting section of the pipeline consists of two stages: establish a segment of pipeline in one with the rig line and then pick it up along the tower.

A third technical advantage of the invention concerns the use of tensioning devices and clamps to provide the desired gripping of the pipe. Thus, the and in the process of pipeline construction; tower installed on the vessel; a means of lifting the segment of pipeline in one tower line; means coupling section of the pipeline laid to the pipeline; tensioner installed with the possibility of capture of pipeline laid and lowering it into the water with maintaining the desired tension in the pipeline during the passage of the pipeline through the tensioning device; and at least one clamp for gripping the pipe below the tensioning device. In this aspect, the invention also relates to a method of laying pipeline from a vessel using a tower that is installed on the vessel. From the deck of the vessel periodically raise the segments of the pipeline in one tower line, in turn join each segment of pipeline laid pipeline, which is captured through a tensioning device and lowered into the water by maintaining the desired tension in the pipeline during the passage of the pipeline through the tensioner. If any breaks in the pipeline its capture by at least one of the clip below tensioning devices.

The fourth technical advantage of the invention concerns the use of the lower guide device containing several groups nm, in its fourth aspect, the invention relates to a vessel-the pipe layer containing a pull up tower, which determines the route of the pipeline during laying, and the lower guiding device for guiding the movement of the pipeline after passing the tower. The lower guiding device has several groups of guide rollers located at a distance from each other along the pipeline route and limiting the lateral limits of the called line, while guide rollers are located with the possibility of bending of the pipeline during its passage through the lower guiding device. In this aspect, the invention also relates to a method of laying pipeline from a vessel. According to this method, the pipeline is flushed down the length team up rig of the vessel and then passed through the lower guiding device containing several groups of guide rollers located at a distance from each other along the pipeline route and limiting the lateral limits of this route, with some bending of the pipeline as it passes through the lower guiding device.

The above-described technical advantages of the present invention may be implemented together, a completely independent who any of the preferred features of the invention, above.

List of drawings

Vessel used in any of the methods of the present invention may be performed in any of the above defined forms.

Some forms of execution of the proposed ship-booms are described in the following examples with reference to the accompanying drawings, in which:

Fig.1 is a side view cross-section of the vessel-side booms;

Fig.2 is a front view of the ship;

Fig.3 is a top view of the vessel, the part of the form is a section;

Fig.4 is a cross-section area of preparation of pipes on the ship, in larger scale than in Fig.1;

Fig.5 is a side view of the tower, on a scale larger than in Fig.1;

Fig.6 is a cross section of the tower through line a-a in Fig.5;

Fig.7 is a cross section of the tower through line b-b In Fig.5;

Fig.8 is a longitudinal section of part of the tower - bottom shutter ramps;

Fig.9 is a cross section along the line C-C in Fig.8;

Fig.10 is a side view of the ship;

Fig.11 is a side view of the lower part of the tower, similar to those shown in Fig.5-10, but having changed the lower guiding device for piping;

Fig.12 is rear view of the lower part of the tower, showing the practice showing spatial arrangement of the guide rollers in a modified bottom guide device;

Fig.14 is a top view cross section of the bottom portion of the modified lower of the sending device;

Fig.15 is enlarged in comparison with Fig.14 scale top view cross-section of the lower part of the same plot of the modified lower of the sending device;

Fig.16A is a sectional view along the line D-D in Fig.15 the guide part of the modified lower guide device where the guide portion is in an unstressed state;

Fig.16B is a sectional view along the line D-D in Fig.15 the guide part of the modified lower guide device where the guide portion is in a loaded condition;

Fig.17A is a top view cross-section of the upper section of the modified lower of the sending device;

Fig.17B is a top view of a section of the upper section of the modified lower of the sending device;

Fig.17C is a top view in an enlarged scale of a node of a roller of the type shown in Fig.17A and 17B.

Information confirming the possibility of carrying out the invention

In the drawings, beginning with Fig.1-3, shown is an example of a ship-booms, generally indicated by the numeral 1, represents a semi-submersible vessel, movement and manenguba large rotary valves 3, installed at both sides in the area of the bow, with the usual construction, which are hereinafter for purposes of simplicity will not be described in detail and shown.

Cranes 3 lift on Board the vessel containers 4 pipes (pipe sections), which are delivered by freight barges or other similar means (not shown), and placed them on the deck on both sides of the ship add-ons.

Next pipe 5 serves crawler cranes 6 and the conveyor (not shown) to the platform Assembly of two - and four-section of the pipe (segments of the pipeline), which comes in the form of module 7 is installed on the deck of the vessel 1 (see Fig.3 and 4). Module 7 four lashes placed on the starboard side of the site building the pipeline.

Crawler cranes 6 first move the pipe 5 from warehouses, representing the racks on the ship or the containers in which the pipes were loaded on a ship, module 8 section facetiously located on the port side of the ship, in close proximity to its centerline. After facetiously pipe 5 transverse conveyors carry the pipe to the platform 9 two lashes module 7 four-section of the pipe, which is welded single sections. Transverse conveyors can be made up of the m rollers, which allow longitudinal movement of the tubes and can be adjusted to pipes of different diameters.

Module 7 four-section of the pipe has two different levels. On the lower level at site 9 two lashes, while four pipes 5, obtained from the plot of facetiously, are transferred to the corresponding position in the module, where are welded in pairs in double-whip 10. Welding is performed on the four welding positions, and x-ray quality control of welded joints shall be made on the fifth working post. If welding is performed correctly, two of the scourge of 10 raised to the second level, on a platform 11 four-section of the pipe. Otherwise, the string is removed from the Assembly zone of the module 7 for repair, and in case of his inability to cutting. At site 11 four lashes two two-section whip 10 are welded to each other (on the four welding positions), and then tested on the fifth post (post non-destructive testing), resulting in a four-section whip 12. If the whip 12 meets the requirements, it moves horizontally to the centerline of the vessel, which has a conveyor for transporting it to the bow. If non-destructive control of ESCA, four-section whip 12 is cut into four single partition 5 and is then piped back to the site 8 facetiously, where again is the chamfering before returning to welding.

On the bow of the vessel 1 at its axial line between the two valves 3 with the mounting tower, in General, marked 14. The design of the tower 14 provides ease of installation and removal. The tower 14 is connected to the hull by two hinges 15, which provides a working angle in the strip defined by the longitudinal axis of the tower, in the range from 90 to 120(i.e., from the vertical position to the tilted 30from the vertical). This tilt is required for piping of different sizes at different depths (from shallow waters to great depths). The angle of the tower 14 is defined by a hinged lifting system, described below.

Derrick 14 consists of three main sections, as shown in Fig.5. The lower section or basket 16, is designed to withstand a maximum tension force of the pipeline, perceived by one or more friction clamps 18. There are clamps 18 and at its lower edge has a bottom launching ramp 17 with one of the Ohm version of the rig is made with the possibility of its installation and dismantling by means of the valves 3, or auxiliary vessel with a crane, and storage on the deck or barge. Friction clamps 18 includes at least a fixed clamp for a secure grip (hold) pipe 40 during breaks in the gasket. In the preferred embodiment, also provided by the clamps, movable hydraulic lifts that can be used when the gasket is attached to the pipe objects that are too large or have an irregular shape, in order to properly hold the tensioning devices.

In the middle section 19 posted by three tensioning device 20, which in the process of working down the pipeline into the water, maintaining the tension of the pipeline, and support rollers for pipe, guides him when derrick 14 is not vertically. Tensioner represent tensioner crawler type, similar to the well known for a number of years in the S-laying, and support rollers to support the pipeline also belong to a known type. They are not described in detail. In the middle section 19 are also retractable pulley (not shown) of the system temporary lowering and lifting of the pipeline, which can be removed when not in use. Also the economy in relation to the tower), to the laid pipeline. In particular, at the lower end of the middle section are post non-destructive testing and post 21 installation joint with floating floors (lower ground). And at the upper end of the middle section is a welding station 23 with floating floors (upper Playground). The distance between the welding positions 21 and 23 (the upper and lower sites) approximately corresponds to the length of the pipeline, in particular four-section whip 12, while the upper part of the scourge can be in post 23, and is situated at the bottom of the post 21.

System temporary lowering and lifting contains double-drum winch (electric drive) attached to it winding drum and wire rope from steel wire. The steel cable goes to a retractable pulley (located in the middle part of the tower), and then connects to the pulling mechanism. The time of descent and ascent is located on the main deck in the middle on the centerline of the vessel 1 adjacent to module four-section of the pipe.

The upper section 22 of the tower 14 is of relatively light construction, since it does not have to withstand the tension on the pipeline. There are docking device and centeroo is a, described below centering on the post 24. The top section 22 may be mounted to the middle section 19 and removed from it in the framework of the installation work aboard the ship.

Lifting system that controls the change in the slope of the tower 14, uses arrows 25 attached to the top of the middle section 19 at its rear, or inner, surface and lifting devices 26 jacking type on the frame 28 of the support base placed on the deck directly over the valves 3 at the stern side. The lifting system includes hydraulic cylinders, each of the pistons are attached by set of four hydraulically controlled locking pins, which come in a number of holes in the shafts 25. When the tower is not podemcrane, she held similar locking pins mounted stationary in the frame 28 of the base. If the tower you need to move more than the value of the stroke of the hydraulic cylinders, it kept locking pins, while the cylinders are returned to the original position for the next stroke.

Whip 12 pipes, waiting in practically a horizontal position on the platform 11 four-section of the pipe is transferred to the longitudinal conveyor 29A to medium rise cut tubepre conveyors can be composed of rollers 29A, axis which is inclined to the horizontal so that the rollers form a V-shaped structure within which moves the pipe. They can be installed with the possibility of moving closer to or further from the centerline, so that tubes of different diameters could move at the desired height above the deck.

Tropopause 29, made, for example, in the configuration of the cradle-support, consists mainly of beams 30, the transmitting pipe 12 from the platform 11 four lashes to the middle section 19 of the tower 14 by turning the hinge 31. The hinge mount that can rotate tropopause without problems sets the pipe in any position which it should occupy at different working angles of the strip (from 90 to 120). The design of the beam 30 provides its minimal weight to obtain the minimum inertia of the system. As can be seen in Fig.3, the beam loader located on the starboard side of the site building the pipeline, and it has attached to the nodes 32 (Fig.5), which firmly grasp the whip 12 of the pipe and hold it near the beam during rotation. Whip 12 pipes horizontal roller conveyor 29A from the platform (11) four-section of the pipe in the area pagrus what can be captured clamping nodes 32 on tubeporncity 29. In the middle to the bottom end of the loader 29 is installed mechanical stopper 33, which prevents loss of pipe failure hydraulic clamps 32. In normal conditions, the pipe rests on the stopper 33 to avoid damage beveled pipe end.

The rotation of tropopause 29 is carried out by means of two winches (not shown) installed on an a-shaped frame 28. Lifting winch, the rope which passes through the pulley on the tower, raises and lowers tropopause 29, meanwhile, hoist protivostaianie attached a constant tension in the opposite direction to prevent uncontrolled movement of tubeporncity when he is in the process of turning the vertical position or under the influence of ship motion. The rotation speed of the winch is chosen such that the loading was completed within the cycle of the laying process.

The purpose of the loader 29 is only to grab the pipe 12 (by means of clamps 32) and rotate it into position with the same angle of inclination as that of the tower 14. As soon as the pipe 12 mounted along the tower 14, the truck stops and waits (while continuing to hold the pipe) descent of the hoist 34.

Lift 34 grips the pipe string 12 with plush moving on two rails 35, located in the middle part 19 and the upper part 22 of the tower to the left of the centerline of the loader 29. On a mobile unit installed in a drop-down clamps 37. As shown in Fig.6, when the clamps 37 are in the fully open position, they are shifted to the left side on the site of the building of the pipeline so that the loader 29 may install pipe string 12 along the hoist 34. If you are working with a small pipe may also be provided by guide rollers. At the lower end of the hoist 34 is installed a safety fence for support of pipe whip in case of failure of hydraulic clamps 37. When the loader 29 is coming to the tower 14, and a hoist 34 is in its lower position, the clamps 37 grip the pipe 12, and terminals 32 to release it. Then lift 34 raises the pipe to the top position. Then, the pipe 12 is moved to carry the clamps 38.

Three spaced vertically-carrying clamp 38 is used to transfer the pipe-laying 12 from the lift to the centering device 24: in Fig.6 shows one carrying clamps in three different positions; the clamps are made as independent nodes, each of which contains rotating and lengthening the lever that controlled Prienai (aside), lift delivers to him the pipe. If they are in the inner position, the centering device 24 are shifted in the transverse direction and take away a pipe.

If the pipe string 12 is delivered by the lift 34 in place before the centering device 24 cleared for its reception, transferring the clips 38 can hold the pipe string to a replacement position, as shown in Fig.6. In addition, while the pipe string 12 is held at a standby position, it can be entered detachable cable or hose supply and/or the lower end may be preheated for welding.

The use of the centering device 24 is necessary for accurate installation of pipe whip 12 in line with the pipe 40. These devices can move the pipe in all three directions. They consist of a combination of roller clamps that secure the horizontal position of the pipe-laying 12, allowing it to rotate, and at least one rotatable friction clamp through which you can adjust the orientation of the pipe around its axis. Each device is structurally independent of the others, but management must be done through converters to provide toonie rollers to provide reliable support pipe 12 during construction, when centering clamps are open, even when an angle of the tower 14.

In Fig.8, 9 and 10 show the lower launching ramp 17, on which the output rollers 41 groups of three rollers on the trolley 42. In the process of laying a pipeline, each trolley 42 is pressed against the pipe 40 by a hydraulic cylinder 44, in which pressure is generated by a battery (not shown), and the load on the trolley 42 is controlled by a torque element 46. The movement of each truck manages a lever mechanism 48, while the fully retracted position of the set screw jacks 50. Thus, the output rollers 41 can simultaneously control the position of the pipe 40 and to control the movement of the pipeline during its descent from the vessel. If you want more precise control, you may have multiple groups of trolleys 42, one above the other, as shown in Fig.10 that allows you to control the bending of the pipeline, resulting in its construction can be maintained at a small angle to the axis of the tower 14, which increases the flexibility of the vessel.

Lower output rollers 41 are guide rollers 52 for cable. The rollers 52 mounted on the pivot levers 54 and is moved between the extended and retracted progestone and nominated for to guide the cable in a temporary lowering and lifting of the pipeline.

The vessel 1 is based remotely managed device 58 underwater maintenance of the pipeline to monitor the tap pipeline 40 bottom. Because the touch point is right under the stern of the ship, almost under it, such device can be remotely controlled from the aft deck of the vessel 1 without applying long uncomfortable safety ropes. Instead, or in addition to using this DUA, hitting bottom can be controlled active or passive sensors 60, mounted on the aft of the ship.

In the process, the segment of the pipeline (whip) 12 set the centering device 24 in one line with the pipe and held them until the lower end of the segment of the pipeline is welded to the upper end of the pipe 40 by welding the post 23. Then the centering device release docked segment of the pipeline, the vessel moves forward, the pipeline is released and pivots 20 on the length of docked cut (four-section whip 12). After that just completed weld is checked on the post 21 non-destructive testing, and the new whip 12, which meanwhile is 4.

Derrick 14 consists of three sections and is attached to the vessel, and module 7 four lashes made in the form of one or more stand-alone modules that are attached to the deck so that all pipe-laying equipment can be installed and dismantled easily and quickly. It allows you to convert the ship in the whole of the booms in a conventional semi-submersible floating crane.

For example, the vessel shown in the drawings, may have the following dimensions:

The length of the vessel 200

Tower height of 135 m

The range of pipe diameters (outer diameter) From 4 to 32’

The maximum diameter of stacked

objects (with open tension devices) 2.5 m

The depth range of gaskets for pipe 4’ 50-3000 m

The range of depths for pipes 32’ 200-2000 m

The maximum holding force of the gasket

(tensioner) 525 t

The maximum holding force of the gasket

(mobile terminals) 2000 t

The angle of the mounting tower 90-120

Traction intermediate winch temporary lowering and lifting (double drum) Up to 550 t (max)

Traction main winch temporary lowering and lifting (linear winch) 2000 t (max)

The length of the pipe sections, paraclade 2 min

The maximum wave height

during installation (important) 4 m

In Fig.11-17C presents a modified version of the lower guide device 61, which can be used instead of the lower trigger the ramp 17. In Fig.11-17C parts corresponding to parts shown in the other drawings have the same item numbers. As shown in Fig.11 and 12, the device 61 in General is a tubular frame comprising four longitudinal load-bearing element 62 and cross bridge 63, joined together with formation of a rigid structure attached to the lower end of the tower 14 four feet (eyes), one at the top of each of the elements 62. A support attached to the tower corresponding pin connections.

Further, in Fig.13-17C shows how the design formed by the elements 62 and 63, is used to accommodate different nodes at different levels, including stationary and movable clamps 18A and 18B, respectively (Fig.13), three groups of adjustable rollers 64A, B and C and six groups of guide rollers 65A-65F, and each group contains a ring of rollers, as will be described in more detail below.

Adjustable rollers 64A, B and C perform the same task as the rollers 52 described with reference to Phi is, the movement is performed by the respective hydraulic devices with cylinders and pistons. In this particular example implementation of the invention, each of the groups of rollers 64A and B is, as shown in the top view in Fig.17A, and contains 4 roller 66, evenly (with the same angular interval) located around the route of the pipeline, and all of the rollers of the group of rollers IS installed, as shown in the top view in Fig.17B, and consist of eight rollers 67, spaced from each other at equal angular distances. One of the purposes of rollers 64A, B and C is to keep the pipeline (pipeline) 40 within the Central circular region of the adjustable radius so that the clamps 18A and 18B, which are used only in special cases, for example in an emergency, could be guaranteed to capture the pipeline. However, another purpose of the videos, especially videos V and S is providing some initial controlled bending of a pipeline, even with their relatively high position above the water surface. Television cameras 69 (Fig.13) and the load sensors associated with the mountings of the rollers allow you to control the physical rehabilitation of the cylinder and the fluid pressure in these cylinders.

In Fig.17C as an example, depicts one of the hydraulic piston devices. It is seen that the rollers 66 and 67 mounted for rotation on the bracket (support) 70, and a torque rod 71 provides a measurement of the forces acting from the side of the pipe 40 on the roller 66, 67. The bracket is attached to the piston of one of the hydraulic devices 68, which contains the sensor 72 pressure to control the pressure in the cylinder and a position sensor for controlling the position of the piston relative to the cylinder.

All signals from the television cameras 69 and sensors 72, 73, and torque rods 71 are received by the multi-conductor cable 79 through the junction box 80 in block 81 of the control that can be installed in the control tower. The signals control the operation of the hydraulic piston device 68 receives from the block 81 of the control unit 82 of the control fluid into the hydraulic system and controls the control valves.

Next, a more detailed description of the installation of six groups of guide rollers 65A-65F with reference to Fig.13, 14, 15, 16A and 16B. For convenience of presentation first will be described the location of the group of rollers 65D, groups, depicted in Fig.14. Steel ring 75 is the main silove him all the rollers 65D circumference. The ring 75 is rigidly attached to the four longitudinal elements 62 of the lower guide device through the uprights 76. Directly inside the ring 75 is another annular element 77, which is mounted for rotation rollers 78. The annular element 77 is connected to the ring 75 at the four points located at equal angular distances from each other around a group of rollers, by means of elastic holders 83, shown in Fig.16A and 16B.

In Fig.15, 16A and 16B, in particular, it is shown that the rollers 78 is secured at both ends for rotation on the bracket 85, which is attached to the ring-shaped element 77 and act from it radially inward. At four points to the ring 75 is welded to the brackets 86 holders 83, providing elastic suspension rollers, and each bracket 86 has an upper shoulder 87 and the lower shoulder 88 which protrude radially inward, covering the ring-shaped element 77. Each of arms 87, 88 are connected with the element 77 suitable support 89 elastomer. In Fig.16A shows a support in a relaxed condition, while Fig.16B bearing 89 is shown in a state of stress due to the displacement of the rollers 78 radially outward (due to what had happened to meet who I achieve this offset bearings 89 are shear deformation.

With each group of guide rollers 65A-65F torque associated elements (not shown), the signals from which are sent to the block 81 management through the junction box 80 and the cable 79. The signals from the torque elements can be used by the control device for the correction process of the pipeline or for changing the direction or speed of the vessel, etc.

Next will be described the operation of the guide rollers in the process of pipeline construction. For simplicity of presentation will consider the case of the vertical position of the tower, but it should be borne in mind that the work of the sending device, essentially will not change when you tilt the tower. Also for simplicity of presentation will first be assumed that the ship is heading directly over the route of the pipeline, and its centerline aligned with the course.

To the curvature of the pipeline in the base area was not excessive, it is necessary to when laying pipeline from a vessel on the pipeline was affected by the horizontal force in the direction of the strip, and that also created the tension. At the same time, the force applied must not create excessive local stresses in the horizontal line power, and it is desirable that the strength of influence of each group of rollers were about the same. In an embodiment of the invention it is achieved that groups of rollers when they are positioned along a curved line, providing a controlled degree of bending of the pipeline during its passage through the group of rollers. Thanks to the elastic suspension of the roller load distribution across different groups of rollers becomes more uniform.

A particularly useful feature of the design guide is that each group of rollers completely surrounds the pipe. This allows the gasket, when the vessel is at any angle to the direction of the pipeline, which may be desirable or essential for laying a pipeline in a strong current.

In the specific example of the invention, which can be used in the specific example described above vessel, of the group of rollers 65A-65F spaced along the pipeline route with an interval of 5.2 m, and the upper group of rollers 65A is located above the water level, and all other groups of rollers are under water. In this case, the distance between the circumferential surfaces of the two diametrically opposite rollers in each of the 8

Holders of groups of rollers 65A-65S have a sufficiently high rigidity. The radial stiffness of the rings 77 these groups of rollers is about 5000 kN/m (with a maximum offset of 100 mm), while the holders of the groups of rollers 65D-65F have less stiffness and provide radial stiffness of the rings 77 for these groups of 1000 kN/m (with a maximum offset of 300 mm). During normal operation, the total load normally applied to the pipeline all six groups of rollers, is about 1000 kN, resulting in a force acting between each roller and the pipeline is about 170 kN.

Claims

1. Ship-pipelayer containing the means of promoting the vessel for laying a pipeline, tower, installed hinged tiltable relative to the vertical, the top of the tower forward in the intended direction of movement of the laying of the pipe and the bottom of the tower in the opposite direction, means lifting section of the pipeline from the deck one with the tower line, means coupling the specified section of the pipeline to the laid pipeline and lower launching ramp with rollers and installed with the possibility of sending pipe is agemono the direction of movement of the laying of the pipeline, when this vessel is equipped with means for the Assembly of pipe sections in a generally horizontal position in the segment of pipe of greater length, tension devices installed with the possibility of capture of pipeline laid and lowering it in the water while maintaining the desired tension in the pipeline, and at least one clamp mounted with the possibility of capture of the pipeline below the tensioning device.

2. Ship-pipelayer under item 1, characterized in that the means of promoting the vessel contains propellers associated drive motor vessel.

3. Ship-pipelayer under item 1 or 2, characterized in that the means of Assembly of the pipe sections contain means of welding four sections in one segment of the pipeline.

4. Ship-pipelayer according to any one of paragraphs.1-3, characterized in that the tower is installed with the possibility of forward tilt from the vertical position at an angle of about 30.

5. Ship-pipelayer according to any one of paragraphs.1-4, characterized in that the means of the lifting section of the pipeline contains a cradle-bearing segment of pipeline installed pinned in the zone of the sole of the tower.

6. Ship-pipelayer according to any one of paragraphs.1-5, characterized in that the clamps contain neausea fact, the bottom launching ramp provides means of controlling the load on the pipe as it passes through the rollers.

8. Ship-pipelayer according to any one of paragraphs.1-7, characterized in that in its aft installed a monitoring tool for the pipeline in place touching the bottom.

9. Ship-pipelayer under item 8, characterized in that it comprises the apparatus underwater maintenance of pipeline laid.

10. Ship-pipelayer under item 9, characterized in that the monitoring tool pipeline provides a means of remote control of the above-mentioned apparatus from the vessel.

11. Ship-pipelayer according to any one of paragraphs.1-10, characterized in that the lower launching ramp contains the lower guiding device with groups of guide rollers spaced apart along the route of the pipeline and defining a lateral limits of this route, and guide rollers mounted with the possibility of bending of the pipeline as it passes through the lower guiding device.

12. Ship-pipelayer on p. 11, characterized in that the lower guiding device is made in the form of a funnel, the collapse aimed in the direction of the pipeline

13. Ship-pipelayer under item 11 or 12, characterized in that the guide rollers are installed with the possibility of free rotation.

14. Ship-pipelayer according to any one of paragraphs.11-13, characterized in that at least some of the guide rollers installed fixed for rotation in bearings mounted on an elastic suspension directly or through other elements.

15. Method of laying pipeline from a vessel, according to which the pipeline is implemented by the HSE, which have hinged tiltable relative to the vertical, the top of the tower forward in the intended direction of movement of the laying of the pipe and the bottom of the tower in the opposite direction, while periodically raising the segment of pipeline in one tower line, join a segment of pipeline laid to the pipe and go down the pipe into the water, directing the pipeline at the moment of its exit from the vessel via a roller shutter ramps, characterized in that the tower be installed near the fore part of the vessel for the intended direction of movement of the laying of the pipeline, before the rise of the segment of pipeline in one tower line auscom pipeline capture pipeline by means of a tension device, moreover, the slope of the pipeline carried out while maintaining the preset tension in the pipeline, and at the time of the interrupt process strips carry out the seizure of the pipeline by at least one clamp below the tensioning device.

16. The method according to p. 15, characterized in that the Assembly section of the pipeline is implemented by welding four pipe sections.

17. The method according to p. 15 or 16, characterized in that the inclination of the tower is carried out at a forward angle to the vertical of about 30.

18. The method according to any of paragraphs.15-17, characterized in that segment of the pipeline raise through the cradle-support, which is pivotally secured at the foot of the tower or in the area.

19. The method according to any of paragraphs.15-18, characterized in that during the passage of the pipeline through the rollers of the lower shutter ramps control the load on the pipeline.

20. The method according to any of paragraphs.15-19, characterized in that the rear part of the ship monitor the pipeline in place touching the bottom.

21. The method according to p. 20, characterized in that the observation of touch the bottom of the pipeline is performed with the vessel by means of a remotely controlled device.

22. The method according to any of paragraphs.15-21, characterized in that the direction of the pipeline allowing the rollers, which have a distance from each other along the line of the route of the pipeline, the pipeline is passed through the bottom guide with some Flex.

23. Ship-pipelayer containing the means of promoting the vessel for laying a pipeline, tower, installed hinged tiltable relative to the vertical, the top of the tower forward in the intended direction of movement during the laying of the pipe and the bottom of the tower in the opposite direction, means lifting section of the pipeline from the deck one with the rig line and means for coupling the specified section of the pipeline to the laid pipeline, characterized in that the HSE was established in the area at the tip of the bow on the intended direction of the pipeline, with the removal of underground pipeline for the contour of the vessel in the area of the hull.

24. Method of laying pipeline from a vessel, according to which the pipeline is implemented by the HSE, which have hinged tiltable relative to the vertical, the top of the tower forward in the intended direction of movement of the laying of the pipe and the bottom of the tower in p is some line and join each segment of the pipeline to the laid pipeline, characterized in that the tower be installed near the extreme tip of the bow on the intended direction of movement of the laying of the pipeline, and the pipeline have the contours of a vessel in the area of the hull.

25. Ship-pipelayer containing the means of promoting the vessel for laying a pipeline, tower, installed on the vessel, a means of lifting section of the pipeline from the deck in line with the HSE and the tool coupling section of the pipeline to the laid pipeline, characterized in that it comprises upper area pipe connections located at the top position along the tower, and lower the platform pipe joints located in the lower position along the tower at a distance from the top platform pipe joints, generally equal to the length of one section of the pipeline, with this tool lifting a segment of pipeline installed with the possibility of the location of the lower end section of the pipeline mainly at the level of the upper platform pipe joints and tool coupling section of the pipeline to the laid pipeline installed in the area of the top and/or bottom landings of the pipe connection.

26. Ship-pipelayer on p. 25, characterized in that the means of recovery is the rise of segments of the pipeline along the tower.

27. Method of laying pipeline from a vessel, according to which the pipeline is implemented by the HSE, with the deck of the vessel periodically raise the segments of the pipeline in line with the HSE and join them with padded pipeline, characterized in that the coupling sections of the pipeline with padded carry out pipeline on the upper and/or lower floors of the connection pipes, which have a distance of, basically equal to the length of one section of the pipeline.

28. The method according to p. 27, characterized in that the rise of each segment of the pipeline is carried out in two stages, with the first set piece of the pipeline in one with the rig line and then raise a segment of the pipeline along the tower.

29. Ship-pipelayer containing the means of promoting the vessel for laying a pipeline, tower, installed on the vessel, a means of lifting section of the pipeline from the deck of the ship one with the tower line, means coupling the specified section of the pipeline to the laid pipeline, characterized in that it comprises a tension device mounted with the possibility of capture of pipeline laid and lowering it into the water with maintaining the desired tension in troops the possibility of seizure of the pipeline below the tensioning device.

30. Method of laying pipeline from a vessel, according to which the pipeline is implemented by the HSE, with the deck of the vessel periodically raise the segments of the pipeline in one tower line, and then join each segment of pipeline laid pipeline and lowering the pipeline into the water, characterized in that before lowering the pipe its capture by the tensioning device, the pipeline is lowered by maintaining the desired tension in the pipeline during the passage of the pipeline through the tensioner, and at all breaks in the pipeline its capture by at least one clamp below the tensioning device.

 

Same patents:

The invention relates to construction and is used when replacing underground pipelines

The invention relates to construction and is used in the construction and repair of underground pipelines

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The invention relates to the construction and used in the repair and replacement of pipelines

FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

SUBSTANCE: a reciprocating striker is positioned in the casing of the pneumatic percussion mechanism. The air-distributing system of the mechanism includes the front and rear working chambers, inlet and exhaust valves and a fixture for closing and opening of the exhaust channels made in the form of a spring-loaded end face stopper coupled to a tractive member. At actuation of the pneumatic percussion mechanism, before the supply of compressed air, the exhaust channels are closed, they are opened after the inner cavities of the pneumatic percussion mechanism are filled with compressed air.

EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

3 cl, 3 dwg

FIELD: construction engineering; erection of pipe lines in thawing permafrost soils and in flooded areas.

SUBSTANCE: proposed method includes ditching at trench with widened areas located at definite distances and pipe line is laid on bottom of trench. Pipe line is covered with flexible rugs and bottom of trench at widened areas is also covered with rugs; edges of rugs are fastened in widened areas and trench is filled. Used as anchor member are cylindrical textile containers placed in lugs of flexible rugs in parallel with pipe line and filled with soil. Prior to fastening the edge sections of flexible rugs, each of them is tightened at fixation of tension; preliminary tension of edge sections is effected during filling the widened areas and trench soil ensuring contact of flexible rugs with bottom of widened areas and trench. Filling the widened areas and trench is performed in direction towards pipe line, symmetrically relative to it.

EFFECT: enhanced reliability of attachment of pipe line at 0required marks.

13 cl, 4 dwg

FIELD: construction engineering; erection of pipe lines in permafrost soils at alternating terrain.

SUBSTANCE: trench in smooth terrain and in sections cut by hydrographic net is dug in active layer at depth sufficient for location of upper generatrix of pipe line above level of daily level. Prior to laying the pipe line, bottom walls and berms of trench are lined with cloth of non-woven synthetic material. backfill soil is placed in ballasting polymer panel-type devices or in ballasting polymer container-type units suspended from pipe line. Anti-erosion partitions made from non-woven synthetic material are formed in sloping sections together with funnel whose neck is located downward of water flow embracing the pipe line at specified clearance between neck and pipe line. Funnel is formed by covering the natural slope of backfill soil by free lower edge of non-woven synthetic material with ballasting polymer panel-type or ballasting polymer container-type devices placed on lower portion of funnel followed by subsequent removal of embankment protecting the pipe line. As far as sections of route cut by hydrographic network are concerned, anti-erosion partitions are formed in trench at transients with opposite slopes of microterrain; anti-erosion partitions are made from anti-erosion cloths and backfill soil is placed n soil-filled weighting materials attached to pipe line. At low points where opposite sections cross, water pass or water bypass structure is formed in trench.

EFFECT: enhanced reliability; reduced scope of earth-moving work; enhanced stability of pipe line in horizontal plane.

9 cl, 8 dwg

FIELD: pipe line transport; major repair of pipe lines.

SUBSTANCE: proposed method includes introducing the front end of pipe into damage pipe and forming hermetic cavity in inter-pipe space; then, pressure air (gas) is charged into hermetic cavity for motion of new pipe inside damaged pipe, after which piston is fitted at end of new pipe and detachable flange is connected to rear end of damaged pipe; motion of new pipe is effected by periodic charging of air into hermetic cavities; each hermetic cavity is bounded by piston and seal.

EFFECT: reduction of tractive force.

5 dwg

FIELD: construction engineering; erection of underground pipe lines in permafrost soils, in bogs and in flooded and marshy areas.

SUBSTANCE: proposed polymer container ballasting unit has two distance rigidity frames located on both sides from pipe line, reservoirs made from polymer commercial cloth and filled soil which are secured to said frames, anti-erosion partitions and upper and lower weighting belts. Distance rigidity frames are curvilinear in form and their height exceeds diameter of pipe line being ballasted. Bend of each frame is made at obtuse angle and lower part of each frame is inclined towards pipe line relative to trench bottom. Polymer commercial cloth laid along pipe line makes distance frame rest against ground of trench bottom both in filling the reservoirs with soil and at action of pushing-out load.

EFFECT: extended functional capabilities.

3 cl, 1 dwg

FIELD: laying or reclaiming pipes.

SUBSTANCE: method includes removing upper layer of spoil, developing side trench with disposal the spoil by damping. The development of side trenches is performed step-by-step. The stripped trench is provided with stripping machine, the side trench are deepened by the working members of the stripping machine below the bottom of the pipeline and pipeline is continuously stripped by trenching machine and stripping machine when it moves forward. The stripping machine has frame with running carriages, clamps, supporting members and mechanism for forward motion.

EFFECT: enhanced efficiency.

3 cl, 4 dwg

FIELD: construction.

SUBSTANCE: pipeline is laid on the concave part of the longitudinal section of the trench bottom on the layer of soft soil and is locked by filling one or two layers of soil with compacting. Screw vertical anchors and load-carrying belts are then mounted. Before filling the trench, the space between the belt and pipeline is provided with a cloth of unwoven synthetic material.

EFFECT: enhanced reliability of pipeline locking.

4 dwg

FIELD: pipeline transport.

SUBSTANCE: flexible pipeline comprises several pulp lines provided with chambers with ball check valves and interconnected through piping diaphragms. The outer surface of the pulp line is provided with a displacement device for movement along the pipeline. The sections of pulp lines receive shell made of layers of syntactic and polyurethane, the ratio of thicknesses of which is (10-4):1. The displacement device affects the piping diaphragm, pumps hydraulic mixture from the bottom section to the next one which is arranged above the check valve, and moves along the outer side of the pulp line to the next piping diaphragm mounted above.

EFFECT: expanded functional capabilities.

3 dwg

FIELD: construction.

SUBSTANCE: pipeline has triply connected supports mounted on the stable sections above and under the slope subject to creep, one connected supports arranged over the subject to creep slope, and deformation compensator. The distance between the upper support and site of the deformation compensator arranged below the slope subject to creep is determined from the formula proposed.

EFFECT: enhanced reliability of the pipeline.

2 dwg

FIELD: construction.

SUBSTANCE: working member comprises rotors provided with teeth arranged symmetrically with respect to the axis of pipeline and provided with drive and mechanism for bringing the rotors together and moving them apart. Each rotor is provided with cleaning device which is arranged behind the rotor and secured to the unmovable segment of the working member for keeping it unmovable or permitting rotation. The cleaning members permanently co-operate with the outer side of the rotor.

EFFECT: enhanced efficiency.

1 dwg

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