RU177120U1 - SUPPORT AND CENTERING PLASTIC RING - Google Patents

Abstract

The utility model relates to the construction of pipelines, in particular, to supporting and centering plastic rings, designed to protect against mechanical stresses of the insulation coating of pipelines when laying them under roads and railways, as well as other engineering structures. The supporting and centering plastic ring with protrusions on the the surface contains nozzles having a cross-section of an Λ-shaped type made for installation on protrusions with the possibility of reducing the displacement of the longitudinal axes the supply and casing pipes relative to each other. The technical result is the expansion of consumer properties, simplification of installation technology and the use of simpler and cheaper equipment, lower requirements for the qualification of the necessary workforce, increased reliability of pipelines with underground passages. 4 s.p. f-ly, 2 ill.

Description

Support and centering plastic ring. The utility model relates to the construction of pipelines, in particular, to supporting and centering plastic rings designed to protect against mechanical stresses of the insulation coating of pipelines when laying them under roads and railways, as well as other engineering structures.

Known support-centering rings at the transitions of pipelines in a protective casing containing prismatic protective elements located on the outer surface of the pipeline along its generatrix (RU 2217644 C1, F16L 1/028, F16L 7/00, publ. 11/27/2003, Bull. No. 33) . The disadvantage of this technical solution is the complexity of the design and the need for sophisticated technological equipment to ensure alignment of different diameters of the supply and casing pipes during the construction and repair of transitions of underground pipelines in protective casings under obstacles.

Also known support for pulling the pipeline inside the protective casing (RU 2249748 C1, F16L 7/00, publ. 04/10/2005 Bull. No. 10). The disadvantage of this support is the complexity of the device, the need to use complex and cumbersome means to move the pipe in the axial direction and ensure the alignment of the supply pipe and the protective casing in order to protect the transition from harmful environmental influences.

The prior art support and centering plastic rings of the DSI system with protrusions on the circumferential surface, designed for installation on the inlet pipe for dragging it inside the casing (www.psi-prodacts.de). However, these plastic rings have fixed sizes, designed for specific diameters of the supply and casing pipes, their use to reliably protect underground pipelines from harmful environmental influences in the presence of casing of other diameters requires complex expensive equipment and highly skilled workers.

In technical terms, these support and centering plastic rings are the closest to the proposed utility model and are taken as a prototype.

The utility model was tasked with expanding the consumer properties of support and centering plastic rings, simplifying the installation technology and using simple and inexpensive equipment, reducing the qualification requirements of the necessary workforce, and increasing the reliability of pipelines with underground passages.

The technical result is the expansion of consumer properties, the simplification of installation technology and the use of more simple and inexpensive equipment, reducing the qualification requirements of the necessary workforce, increasing the reliability of pipelines with underground passages.

The technical result is achieved due to the fact that the supporting and centering plastic ring (hereinafter referred to as the plastic ring) with protrusions on the circumferential surface, designed to be mounted on the supply pipe for dragging it inside the casing, contains nozzles made for installation on the protrusions having a cross-section Λ -shaped type with the ability to reduce the displacement of the longitudinal axes of the supply and casing pipes relative to each other.

Reducing the displacement of the longitudinal axes of the supply and casing pipes relative to each other allows more simple and less costly methods to provide reliable protection of the supply pipe at the entrance and exit of the underground passage through an obstacle from harmful environmental influences.

In FIG. 1 shows a longitudinal section through a pipeline laid in a casing; in FIG. 2 shows a nozzle mounted on a protrusion by a bolted connection. Inside the casing 1 there is a supply pipe 2 with plastic rings 3. The plastic rings 3 have projections 4 on which the nozzles are mounted. 5 by means of a bolted connection 6.

For ease of installation and reliability of attachment of the nozzle 5 to the protrusion 4, its landing part is paired with the corresponding parts of the specified protrusion. Instead of bolted connection 6, a lock connection is also used, in a particular case.

To expand consumer properties and use casing pipes of different diameters, the plastic ring contains several sets with nozzles of different heights.

Support and centering plastic rings with nozzles are used as follows.

Plastic rings 3 with nozzles 5 are used in the case when the diameter of the available casing 1 does not allow for the displacement of the longitudinal axes of the casing 1 and the inlet 2 of the pipes acceptable for sealing the annulus. If the height of the protrusions 4 located on the plastic ring 3 is insufficient for reliable sealing of the annular space at the entrance and exit of the underpass, they are extended using nozzles 5. To do this, nozzles 5 are selected in height, having previously calculated the necessary excess height of the nozzle over the protrusion 4 of the plastic ring 3. The specified excess is found based on the difference in the diameters of the casing 1 and the supply pipe 2 and taking into account the height of the protrusions 4. The diameter of the circumferential surface covering the supply pipe 2 with a plastic ring ohm 3 and with nozzles 5 mounted on the protrusions 4, must not exceed the inner diameter of the casing 1 in order to ensure that the lead-in pipe 2 is pulled inside it.

After selecting the nozzles 5 in height, they are mounted on the tabs 4 of the plastic rings by means of a fixing device, in particular a bolt connection 6. After installing the nozzles 5 and combining the longitudinal axes of the supply and casing pipes, the supply pipe 2 is dragged inside the casing 1 using appropriate equipment and technological operations for trenchless laying of the pipeline by the pipe-in-pipe method. At the entrance and exit of the underpass, the space between the casing 1 and the supply pipe 2 is sealed to eliminate the harmful effects of the environment on the supply pipe 2.

The proposed technical solution has novelty, the prior art is unknown, industrially applicable.

Claims (5)

1. A support and centering plastic ring with protrusions on the circumferential surface, designed to be mounted on the supply pipe for being dragged inside the casing, characterized in that it comprises nozzles made for installation on the protrusions having a Λ-shaped cross section with the possibility of decreasing longitudinal displacement axes of the supply and casing pipes relative to each other. 2. The supporting and centering plastic ring according to claim 1, characterized in that the landing part of the nozzle is associated with the corresponding parts of the protrusion. 3. The supporting and centering plastic ring according to claim 1, characterized in that the nozzle on the protrusion is installed by means of a bolted connection. 4. The supporting and centering plastic ring according to claim 1, characterized in that the nozzle on the protrusion is installed by means of a lock connection. .

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