RU2150633C1 - Device for connecting reinforced plastic pipes - Google Patents

Abstract

FIELD: mechanical engineering; production and connection of plastic pipes. SUBSTANCE: invention relates to connectors of pipes made of plastics. Device has semicylinders with shoulders, reinforcing shells enclosing the shoulders and reinforcing unit for plastic pipe butt joints. Thrust surfaces of semicylinder shoulders and shells are made conical. Semicylinders are connected to shells and plastic pipe butt joint reinforcing unit by self-curing cement. EFFECT: increased carrying capacity of device. 1 dwg

Description

 The invention relates to the field of connecting means for pipes made of plastics.

 A device for connecting reinforced plastic pipes containing half-cylinders, covering the reinforcing shells of pipes and a fastening device for half-cylinders (application EPO (EP) N 0152752, P 16 L 47/00). On the reinforcing pipes and half cylinders, grooves and grooves are made along a smooth wave-like line; the device for fixing the half-cylinders is made in the form of two clamping conical rings; abutting pipes are hermetically connected by means of a pipe fitting welded to or glued to them from the inside. The device provides a rigid connection of joined pipes in the presence of a gap between their ends. A trunk with such a pipe connecting device has a low bearing capacity and limited mounting capabilities.

 The low bearing capacity is explained by the presence of a gap at the junction of the pipes to be joined and the likelihood of extruding into it the walls of the plastic pipes with increasing pressure in the line.

 Limited mounting capabilities are explained by the rigid (univariate) position of the pipes in such a device, which complicates the installation of the line in straight sections.

 There is another device for connecting reinforced plastic pipes containing half cylinders with collars, covering the flanges of the reinforcing shells and the reinforcing joint of the plastic pipes (patent for the invention of the Russian Federation N 2094690, op. 27.10.1997).

 Half-cylinders cover the flanges of the reinforcing shells and the reinforcing joint of the joint of plastic pipes with a gap; shoulders are made rectangular in cross section.

 The bearing capacity of the line with this device (due to the reinforcing unit of the joint of the plastic pipes) is slightly increased, and the installation conditions of the curved sections of the line due to the possible location of the pipes in the device at an angle (thanks to the aforementioned gap) are simplified and expanded.

 The achieved positive effect in this device, however, is insufficient, since the probability of extrusion of plastic pipes into the gaps of the walls due to the introduction of the joint of the joint of the plastic pipes into the device is only partially eliminated, and the location of the pipes at an angle leads to increased contact stresses during the functioning of the line in the beads of the device and reinforcing shells; in addition, there is a likelihood of a radial shear of the reinforcing joint assembly along with the portion of the plastic pipes covered by it at the points of turn of the highway due to unbalanced lateral impact of the flow on the walls of the latter, which also leads to a decrease in the bearing capacity of the device.

 The objective of the invention is to increase the bearing capacity of the device.

 To solve this problem, a device for connecting reinforced plastic pipes, comprising half cylinders with flanges, covering the flanges of reinforcing shells and a reinforcing joint of the joint of plastic pipes, is being improved.

 This improvement consists in the fact that the thrust surfaces of the flanges of the half-cylinders and shells are conical, and the half-cylinders are bonded to the shells and the reinforcing joint of the plastic pipes by means of a self-hardening adhesive composition.

 The implementation of the thrust surfaces of the flanges of the semicylinders and shells conical provides a smoother transition of the cylindrical surfaces of the semicylinders and shells to the thrust, and also reduces the length of the device and increase the installation angle of the connected pipes.

 The fastening of the half-cylinders with the shells and the reinforcing unit of the joint of the plastic pipes with a viscous self-hardening adhesive composition during installation of the device provides a more uniform filling of the gaps between the surfaces of the half-cylinders, shells and the reinforcing unit of the joint of the plastic pipes with subsequent monolithic listed elements in one piece, which eliminates the possibility of transverse ( ) displacement of the reinforcing joint of the plastic pipes and the bearing axial contact of the thrust surfaces of the floor increases cylinders and shells and, thereby, increases the bearing capacity of the device.

 The invention is illustrated in the drawing.

 A device for connecting reinforced plastic pipes 1 and 2 contains half cylinders 3 with flanges 4, 5 at the ends, covering with a gap flanges 6 and 7 of reinforcing shells 8, 9 and a reinforcing assembly 10 of the joint 11 of plastic pipes 1 and 2; the device is mounted on reinforcing shells 8, 9 by means of a pipe 12, covering the half-cylinders 3 and fixed on them motionless (not shown).

 The thrust surfaces 13, 14 of the flanges 4, 5 and 15, 16 of the flanges 6, 7 are conical, and the half cylinders 3 are fastened to the shells 8, 9 and the reinforcing assembly 10 of the joint 11 of the plastic pipes 1 and 2 by means of a self-hardening adhesive composition 17 (shown by thickened lines) .

 The device operates as follows.

 During installation, the pipes to be joined are welded at the joint 11 and a reinforcing unit 10 is installed on it. Then, in the installation area of the device, reinforcing shells 8, 9 and the reinforcing unit 10 are applied with some excess viscous self-hardening adhesive composition 17, on which the half cylinders are installed 3. Adhesive composition 17 in the process of radial rapprochement of the half-cylinders 3 and fixing them with a pipe 12 fills all the gaps between the elements of the device, and at the same time flows and cures with increased uniformity in the gaps between the thrust surfaces 13, 15 and 14, 16 (due to their approach to the annular gaps between the shoulders 6, 7 and the opposing surfaces of the half cylinders 3) and during the curing process monolizes all the elements of the device in one piece (which eliminates the relative displacement of the elements of the device and ensures an increase in the bearing contact between the supporting surfaces 13, 15 and 14 , 16 when operating the line under pressure).

 The implementation of the device according to the invention increases its load-bearing capacity, and also allows to reduce the longitudinal dimensions of the device and increase the installation angle between the connected pipes.

Claims (1)

 A device for connecting reinforced plastic pipes containing half cylinders with collars, covering the flanges of reinforcing shells and a reinforcing joint of plastic pipes, characterized in that the thrust surfaces of the collars of half cylinders and shells are conical, and the half cylinders are bonded to shells and a reinforcing joint of plastic pipes by means of self-hardening adhesive composition.