RU2289056C2 - Bearing plastic ring for hauling pipe line into protective casing - Google Patents

Abstract

FIELD: erection of pipe line transport; hauling pipe line of 57-377 mm in diameter inside protective casing or inside another pipe for construction of pedestrian underpasses.

SUBSTANCE: proposed bearing plastic ring consists of two segments interconnected together and made according to radius of pipe line external diameter; they are provided with intake and entry fastening units. Intake fastening located on one end of segment is made in form of rectangular slot open from three sides and provided with "herringbone" teeth on inner surfaces; entry unit located on opposite end of segment is made in form of rectangular plate with "herringbone" teeth on its outer surfaces at respective pitch for locking second segment in intake unit while assembling them in half-ring and ring.

EFFECT: extended functional capabilities.

8 cl, 10 dwg

Description

The invention relates to the field of pipeline transport and can be used to drag a pipeline mainly with a diameter of 57-377 mm inside a protective casing (case) or another pipe in the construction of crossings under roads and railways.

A support device is known (see RU 2152552, class F 16 L 3/00, 08/22/1996), in which the pipe is held by two brackets, connected by bolts. Between the brackets and the pipe, a heat-insulating element consisting of urethane blocks is placed. The disadvantage of this pipe support is that it requires large manufacturing costs and installation space.

The closest technical solution is the spacer (safety ring, insulating, dielectric, consisting of segments) of GAZPROM TU 51-19-2000, registration No. 19/6, dated June 20, 2000 UDC 621.646 made of polyamide, where the segments are connected in spacer bolted. The disadvantage of this insulating ring is the insufficient strength of the connection of the segments with each other with bolts. Stresses are created at their joints, and with an increase in the load on the bolt joint at the moment of pulling the pipeline with the rings into the casing (case), the bolts break through the walls of the spacer under the nut or under the cap of the bolt. As a result, the rings are destroyed and their fragments fall under the dragged pipeline and destroy its anticorrosion coating. In addition, a sufficiently large number of bolts is used to connect the segments to each other in a ring, which also reduces the strength of the ring.

The objective of the invention is the creation of a supporting plastic ring for pulling the main pipeline into the casing (case) and the operation of the rings in a humid and aqueous environment. The ring is made of a thickness of 4-8 mm and a diameter of ⌀ 57-377 mm, contains from two to four segments, at the opposite ends of which there are receiving and entry nodes. Herringbone-type teeth are made on the outer and inner surfaces of the nodes to reliably connect the segments to each other in a ring using a removable bolt connection. Stiffening ribs are made centrally on the outer surfaces of the segments on two sides of each support, which are connected by an additional stiffening rib located between the supports and designed to increase the strength of the supports and the entire supporting plastic ring. A protrusion is made along the entire length on the inner surface of each segment, designed to prevent the displacement of the support plastic ring relative to the pipeline. When assembling, during the period of segments pulling together, the annular protrusion is pressed into the rubber gasket with a thickness of 2-5 mm, which is pre-installed under the plastic support ring over its entire width, which prevents the plastic support ring from shifting relative to the pipeline when it is dragged into the casing (case) during the construction of the transition.

The essence of the invention lies in the fact that the supporting plastic ring for dragging the pipeline into the protective casing (case) is made of 4-8 mm thick, contains from two to four segments inclusive for pipe diameters of 57-377 mm, made along a radius defined by the outer diameter of the main pipeline , and interconnected into a ring by receiving and input nodes.

The receiving unit of the segment is made in the form of a rectangular groove open on three sides: herringbone-type teeth are made on the inner upper and lower surfaces. The upper part of the receiving unit acts as a latch for fixing the input unit of the next segment with locking stops in it when assembling them in a half ring or ring. The entry node of the segment is made at the end opposite the receiving node, in the form of a rectangular plate, where on the outer surfaces there are made herringbone teeth of the same size as in the receiving node, for fixing the second segment to each other during assembly. In the upper part of the receiving and inlet nodes of the segment, fastening brackets are made with holes in which, for example, removable bolts are inserted to assemble the segments in a half ring or in a ring on the pipeline. In addition, on the entry nodes of the segments in the lower part, a continuation of the segment in the form of a “tongue” was performed to exclude the formation of corrugation on a rubber gasket when assembling two half rings into a ring on the main pipeline. On the outer surface of the segments in the spaces between the receiving and input nodes, supports are made with through holes in the form of circles separated by jumpers. The supports act as sliding elements when dragging the pipeline into the casing (case).

In the center on the outer surfaces of the segments on both sides of each support, stiffeners are made, which are connected by an additional stiffener located between the supports, and are designed to increase the strength of the supports and the entire supporting plastic ring. A protrusion is made along the entire length in the center on the inner surface of each segment. When assembling two or four segments into a ring, an annular protrusion is formed, which is pressed into a rubber gasket 2-5 mm thick during the period of contraction, which is pre-installed under the support plastic ring over its entire width. This prevents axial displacement of the support plastic ring relative to the pipeline when it is dragged into the casing (case) during the construction of the transition.

The assembly of the ring, consisting of four segments, is first carried out in half rings, and then half rings in the ring on the main pipeline, by pulling the half rings together with locking stops. The segments are fixed due to the upper part of the rectangular groove of the receiving unit, which acts as a latch and teeth of the "herringbone" type with a step equal to 2.5-6.5 mm, with a height of 2-4 mm, in the amount of 3-5 pcs. and due to the teeth of the input unit of similar sizes with a step equal to 2.5-6.5 mm, and a height of 2-4 mm, in the amount of 5-8 teeth.

The present invention provides one of the embodiments of the supports in the form of an elongated circle with holes and is illustrated by drawings, where:

- figure 1 shows the supporting plastic ring for a pipeline with a diameter of 114 mm with two segments assembled, side view;

- figure 2 shows the bracket of the supporting plastic ring;

- figure 3 shows the rubber gasket on the pipeline;

- figure 4 shows a portion of the supporting plastic ring on the pipeline;

- figure 5 shows one segment of the support ring with a diameter of 114 mm;

- figure 6 shows the support of the segment in section;

- figure 7 shows the stiffener and the inner protrusion of the ring;

- Fig.8 shows the input unit;

- figure 9 shows the receiving node;

- figure 10 shows a supporting plastic ring with four segments and a rubber gasket on a pipeline with a diameter of 377 mm.

The supporting plastic ring for pulling pipelines with a diameter of 57-377 mm into the protective casing (case) is made of 4-8 mm thick, contains from two to four segments 1, 2 (Figs. 1, 10) inclusive of a width of 50-170 mm, made along the radius defined by the outer diameter of the main pipeline. The segments are interconnected by fastening nodes: a receiving node 3 and a starting node 4 located on the brackets 5 and 6 (Figs. 1, 8, 9).

The receiving unit 3 is made in the form of a rectangular groove 7 (Fig. 5, 9), the upper part of the receiving unit 3 (Fig. 9) acts as a latch for fixing the input unit of the next segment. The groove 7 (Fig.9) is made across the entire width of the segment and is open on three sides. On the inner upper and lower surfaces there are teeth 8 (Fig. 9) of the herringbone type with a pitch of 2.5-6.5 mm and a tooth height of 2-4 mm in the amount of 3-5 teeth.

The starting unit 4 (Fig. 8) of the segment is made at the end opposite the receiving unit, in the form of a rectangular plate 9 (Fig. 4), along the entire width of the segment, on the outer surfaces there are teeth 10 (Fig. 8) of the herringbone type of similar sizes , as in the receiving unit in the amount of 5-8 teeth for fixing segments to each other when assembling in a ring. In the upper part of the receiving and input nodes of the segment, fastening brackets 5 and 6 (Figs. 1, 8, 9) are made with holes 11 (Figs. 2, 8, 9) into which, for example, bolts 12 with nuts 13 (Fig. 1) to tighten the segments into a ring during assembly. On the inner surface, in the center of each segment 1, 2 (Fig. 1), an annular protrusion 14 (Figs. 3, 4) of a height of 1.0-2.0 mm is made to prevent axial displacement of the support guide ring relative to the main pipeline when dragging it into protective casing (case).

At the entry nodes of the segments, the segment was continued in the form of a “tongue” 15 (Fig. 4) to exclude the formation of a corrugation of a rubber gasket when assembling two half rings into a ring on the main pipeline. On the outer surface of the segments made supports 16 (figure 1, 5, 6) in the form of circles 17, 18, separated by jumpers 19 (figure 1, 5). To impart rigidity to the segment, the supports 16 are provided with stiffeners 20, 21, 22 (Figs. 1, 5), which are connected by an additional stiffening rib 23 between the supports 16 (Figs. 1, 5). The support-guide ring for dragging the pipeline into a protective casing (case) with a diameter of 377 mm consists of four segments 24, 25, 26, 27 (figure 10). In the supports 28 (figure 10) holes 29 (figure 10) are made for heat dissipation, which are located one above the other.

The assembly of the supporting plastic ring, consisting of two segments, on the pipeline 30 (Fig. 1) on the rubber gasket 31 (Figs. 1, 3, 4) over the entire width of the ring is carried out as follows: segment 2 (Fig. 1) is applied to the lower part pipeline 30 (Figs. 1, 3), and the second segment 1 (Fig. 1) is applied from above and with coupling bolts 12 and a nut 13 (Fig. 1) (in position view A, the bolt and nut are not conventionally shown) and tighten them. At the same time, the input unit 4 (FIGS. 1, 8) of the second segment enters the receiving unit 3 (FIGS. 1, 9) of one segment. When tightening, the receiving and input nodes of segments 1, 2 (Fig. 1) engage and come together with locking stops due to the upper part of the receiving node 3 (Fig. 9), which acts as a latch and teeth 8 (Fig. 9) ) type "herringbone" with a pitch of 2.5-6.5 mm and a tooth height of 2-4 mm, made on the inner upper and lower surfaces of the receiving node 3 (Figs. 1, 8, 9) in the amount of 3-5 teeth and the outer surfaces of the input node 4 (Fig.1, 8) in the amount of 5-8 teeth 10 (Fig.8). When the segments are pulled together, the protrusion 14 is pressed into the rubber gasket 31 (Fig. 3) and firmly holds the ring on the pipeline. The assembly of the support ring, consisting of four segments 24, 25, 26, 27 (Fig. 10), is carried out as follows: first, the segments 24, 27 and 25, 26 (Fig. 10) are assembled in half rings by pulling them together with each other using a bolt 32, a nut 33 and a bolt 34, a nut 35 (Fig. 10). The assembled half rings from segments 24, 27 and 25, 26 (Fig. 10) are assembled into a ring on a pipeline on a rubber gasket with coupling bolts and nuts 36, 37 and 38, 39 (Fig. 10).

Upon completion of the assembly of two half rings into a ring on the pipeline (Fig. 10), the final assembly of the ring is made by crimping with bolts 32, 34, 36, 38 and nuts 33, 35, 37, 39 (Fig. 10) all segments until the ring is finally fixed to the pipeline. During compression, the tightening is controlled by a torque wrench and the assembly process of the following half rings into a ring on the pipeline is repeated in the same way. At the end of the compression segments, the bolts are removed.

The present invention will allow for reliable pulling of the main pipeline on the supporting plastic rings and the operation of the transition pipelines in a humid and aqueous environment under roads and railways.

Claims (7)

1. A plastic support ring for dragging the pipeline mainly with a diameter of 57-377 mm into a protective casing (case), consisting of two segments interconnected, characterized in that the segments are made in a radius defined by the outer diameter of the main pipeline and are equipped with fastening nodes receiving and input, while the receiving unit, located at one end of the segment, is made in the form of a rectangular groove open on three sides and provided with 3-5 herringbone teeth on the inner surfaces in increments of 2, 5-6.5 mm and a tooth height of 2-4 mm, and the input unit is located on the opposite end of the segment and is made in the form of a rectangular plate, on the outer surfaces of which 5-8 teeth are made of the herringbone type in increments of 2.5-6, 5 mm and a tooth height of 2-4 mm for fixing in the receiving unit of the second segment when assembling them in a half ring and a ring. 2. The supporting plastic ring according to claim 1, characterized in that in the upper part of the receiving and input nodes of the segment, fastening brackets are made with holes for passing through, for example, bolts with nuts to tighten the segments together during assembly. 3. The supporting plastic ring according to claim 1, characterized in that on the outer surface of the segments in the spaces between the receiving and input nodes made supports with through holes in the form of circles separated by jumpers and through holes in the form of circles located one above the other. 4. The supporting plastic ring according to claim 3, characterized in that the stiffeners are made on the supports on both sides, connected in turn by an additional stiffener between the supports. 5. The supporting plastic ring according to claim 1, characterized in that the center has an annular protrusion on the inner surface when assembling the half rings into a ring, which serves to prevent the ring from moving relative to the main pipeline when dragging it into the casing (case). 6. The supporting plastic ring according to claim 1, characterized in that at the entry nodes of the segments, a continuation of the segment in the form of a “tongue” is made. 7. The supporting plastic ring according to claim 1, characterized in that it is made with a width of 50-170 mm and a thickness of 4-8 mm.

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