RU190357U1 - SUPPORTING GUIDE RING FOR PIPELINE - Google Patents

Abstract

The utility model relates to the field of laying pipelines and can be used to pull the pipeline inside a protective casing, inside another pipe or a concrete tunnel when constructing passages through natural and artificial obstacles. The supporting guide ring for the pipeline contains semicircular segments, the connecting ends of which are bent outwards and equipped stiffening ribs, are connected at the same time between a detachable bolt connection. Damping elements consisting of a housing with a spring and damping support rollers made of a dielectric material are uniformly distributed around the circumference of the ring. On the one hand, the connection of the docking ends of the semicircular segments is made in the form of a hinge. The technical result is the expansion of the arsenal of technical equipment of a similar purpose with a simultaneous decrease in the time spent on installing the guide ring on the pipeline, as well as reducing the loads on the damping support rollers.

Description

The utility model relates to the field of laying pipelines and can be used to pull the pipeline inside a protective casing, inside another pipe or a concrete tunnel when constructing passages through natural obstacles, namely, mountains, ravines, waterways, as well as under roads, railways and other engineering structures in all climatic zones.

It is known that in the construction of pipelines, railways and highways, shipping, irrigation canals and various underground utilities are the most serious artificial obstacles. In accordance with the requirements of SNiP 2.05.06-85 *, the specified sections of pipelines fall into category I. The pipeline is located in a metal case - a protective casing or a concrete tunnel, the diameter of which must be greater than the diameter of the laid pipeline by not less than 200 mm. The pipeline to be laid is covered with anti-corrosion insulation and a protective strip. The casing has a length exceeding the length of an artificial obstacle by a value regulated by the SNiP.

After laying the casing under the obstacle, a previously prepared pipeline is dragged into it. To facilitate the process of pulling on the pipeline, the supporting devices provided by the project are fixed. These devices not only facilitate the process of pulling the pipeline, but also fix its position in the casing in such a way that electrical contact between the casing and the pipeline is excluded (see Borodavkin PP and others. “Construction of main pipelines.” M .: Nedra, 1987 , p.338, 339, 345).

From the prior art various support devices for moving pipes.

Known support-guide ring (patent US 6158475 A, publ. 12.12.2000), representing two semicircular segments, interconnected with the formation of a ring closed around the perimeter. On one side, the ends of each semicircular segment are connected by a hinge to provide a pivotal movement from the open to the closed state of the support-guide ring, and on the other hand, flanges are welded to the ends of the semicircular segments, which are connected to each other by a bolt connection. Along the circumference of the ring are placed radially extended inserts-skis.

The advantage of the device is the presence of a hinge, which allows to reduce the time spent on the installation of the support-guide ring on the pipeline.

A disadvantage of the known solution is the possibility of damage to the support-guide ring with a significant length of the transition due to the impact of significant loads on the insert-skis from the weight of the pulled pipe. The flanges have no stiffeners, which does not ensure proper stability of the guide ring.

Common essential features with the claimed technical solution are the presence of semicircular segments interconnected with the formation of a ring closed on the perimeter of the ring on the surface of the pipeline, a hinged connection of the segments on the one hand, and a bolted connection of the segments on the other side.

As the closest analogue (prototype), a support guide ring is known (patent KR 101448521 B1, publ. 10/14/2014), which is a semicircular segment, interconnected with the formation of a ring closed around the perimeter by means of a detachable bolt connection of the semicircular segments bent outwards fitted with stiffeners. Around the circumference of the ring are uniformly placed damping elements consisting of a cone-shaped spring holder, in which the axis of the damping support roller, made of a dielectric material, is fixed.

The advantage of this device are good damping indicators of the guide ring.

The disadvantage of the guide ring is the small area of contact of the support roller with the inner surface of the protective casing, since the supports are exposed to significant loads from the weight of the pipeline being pulled in, as well as significant longitudinal forces, and under these conditions there is an intense deformation of the rollers. Also, the semicircular segments, when assembled into a ring, are fastened with the help of hardware (bolts, nuts, washers), which significantly slows down the installation process. Cone-shaped spring holder support rollers is difficult to manufacture and increases the cost of the support guide ring.

Common essential features with the claimed technical solution is the presence of semicircular segments interconnected with the formation of a ring closed on the perimeter, a bolted connection of the outwardly folded connecting ends of semicircular segments equipped with stiffening ribs, damping elements consisting of a body with a spring and damping supporting rollers of a dielectric material placed around the circumference of the guide ring

Technical result achievable with exercise proposed technical solution consists in expanding the arsenal of similar-purpose technical equipment with simultaneous reducing the time spent on installation of the support-guide ring on the pipeline, as well as reducing the loads on the damping support rollers.

The technical result is achieved by the fact that the support-guide ring for the pipeline contains semicircular segments, the connecting ends of which are bent outwards and equipped with stiffening ribs, which are connected to each other by a detachable bolt joint. Damping elements consisting of a housing with a spring and damping support rollers made of a dielectric material are uniformly distributed around the circumference of the ring. On the one hand, the connection of the docking ends of the semicircular segments is made in the form of a hinge, and the casing of the damping element consists of two rectangular frames, external and internal, with the inner one fixed to the casing of the semicircular segment. The rectangular frame body is made with the possibility of vertical movement relative to each other, while the vertical movement is limited by stops located along the perimeter of each of the frames. On opposite sides of the outer frame of the casing of the damping element, there are two pairs of lugs in which the axes of rotation of the two barrel-shaped damping support rollers are placed. The sides of the outer frame are connected by a jumper parallel to the axis of rotation of the damping support rollers, while on the inner surface of the bridge there is a sleeve that acts as a clamp for the end of one of the spring ends installed perpendicular to the axis of rotation of the damping support rollers, the opposite end of which is fixed with a clamp in the form of a sleeve fixed to the body of the semicircular segment.

The proposed technical solution allows avoiding dangerous overloads of the structure and ensuring smooth running due to the fact that the damping elements are made of 2 spring-loaded damping support rollers, which allows, when overcoming obstacles, to distribute the load over the surface area of the damping support rollers when pulling the pipeline. The barrel shape of the damping support rollers ensures the contact surface of the damping support roller with the inner surface of the housing over a larger area, thus reducing the load on the damping support roller and increasing its service life.

The hinged connection of the semicircular segments reduces the time required for mounting the guide ring on the pipeline.

For a better understanding of the essence of the proposed technical solution, non-limiting examples below provide graphic materials, where:

FIG. 1 shows a guide ring on a pipe pulled through a casing;

FIG. 2 shows a left-side view of the support-guide ring on the pipeline being operated.

FIG. 3 is an isometric depiction of the guide ring;

FIG. 4 shows a damping element;

FIG. 5 is a cross section A-A of FIG. 4 damping elements;

FIG. 6 shows a longitudinal section bb of FIG. 5 damping element.

The support-guide ring for the pipeline (Fig. 1, Fig. 2, Fig. 3) contains two semi-circular segments 1 (Fig. 2), the connecting ends 2 of which are bent to the outside on one side, reinforced by stiffening ribs 3 and interconnected by means of detachable bolted connection 4. On the other hand of the semicircular segments, their ends are connected by a hinge 5. Along the circumference, the spring-loaded damping elements 6 are uniformly distributed in the radial direction, in the form of a housing 7 (FIG. 3, FIG. 4), consisting of rectangular inner 8 (FIG. 4 ) and the outer 9 frames formed by HAND end 10 (FIG. 6) and the side walls 11 (FIG. 5). The vertical movement of the inner and outer frames of the housing is limited relative to each other by end 12 (Fig. 6) and side 13 (Fig. 5) stops. On the side walls 11 of the outer frame of the casing of the damping element, there are lugs 14 (FIG. 4), in which the axes 15 of two damping support rollers 16 are barrel-shaped, made of a dielectric material. The side walls of the housing of the outer frame are connected by a jumper 17 (Fig. 5), on the lower horizontal surface of which is placed a sleeve 18, which acts as an upper spring retainer 19 mounted perpendicular to the axis of rotation of the damping support rollers, and the lower spring retainer is made in the form of a sleeve 20 placed on the surface of the semicircular segment. The height of the damping element 6 with fully bent springs exceeds the height of the bolted connection 4 of the semicircular segment 1.

When a pipe is pulled through a protective casing, a support-guide ring is mounted on the pipe, previously with bolt joints 4 removed. Turning the hinge 5, close the guide-guide ring on the pipeline, after which the semicircular segments 1 connect with each other on the pipe surface using bolts 4 Then the pipe, with the support-guide ring placed on it, begins to be pulled through the protective casing. When pulling the load from the pipe is transmitted to the semicircular segments 1, and through the damping support rollers of dielectric material to the damping elements 6.

An example of practical execution.

It was made two types of support-guide rings with an internal diameter of 279 mm, in which the semicircular segments are made of metal strips located around the circumference. The first support-guide ring was without a hinge, and the second with a hinge, while the installation of the support-guide ring with a hinge decreased by 30-40% relative to the support-guide ring without a hinge. Pipelayers (not shown in the figures) pipeline with mounted support-guide rings were pulled into the protective casing laid under the road (Fig. 1), while the force of pulling the pipe decreased by 15%.

The claimed guide ring for the pipeline has the following advantages:

- reduced time for pulling the pipeline; increases the durability of the PMC;

An increase in rolling bearings can significantly reduce the friction and, accordingly, the force required to pull the pipeline into the protective casing.

Claims (1)

Support-guide ring for the pipeline, characterized by the fact that it contains semicircular segments, the connecting ends of which are bent outward, equipped with stiffening ribs, are interconnected by a detachable bolt joint, while around the circumference of the ring the damping elements consisting of a housing with a spring and damping supporting ones rollers of dielectric material, characterized in that on the one hand the connection of the docking ends of the semicircular segments is made in the form of a hinge, while the body of the damp The feeder element consists of two rectangular frames, outer and inner, fixed on the body of the semicircular segment, made with the possibility of vertical movement relative to each other, while the vertical movement is limited by stops located along the perimeter of each of the frames on opposite sides of the outer frame of the housing of the damping element there are two pairs of lugs in which the axes of rotation of the two barrel-shaped damping support rollers are placed, and the sides of the outer frame are connected bridge parallel to the axis of rotation of the damping support rollers on the inner surface of the jumper disposed hub that serves as a detent end of one of the ends of the spring set perpendicular to the axis of rotation of the damping support rollers, the opposite end of which is fixed with the clamper in a sleeve fixed to a semicircular segment of the housing.

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