RU18192U1 - COUPLING PIPES FROM HIGH-STRENGTH CAST IRON WITH SPHERICAL GRAPHITE - Google Patents

Abstract

The sleeve connection of pipes made of ductile iron with spherical graphite, including the sleeve, the connected ends of the pipes with end sections, characterized in that the threaded elements are placed inside the sleeve, and the end sections of the pipes interact with the O-rings located in the grooves of the sleeve, and the pipes are secured against rotation by stoppers at the same time, a collar with turnkey holes is made on the coupling.

Description

Coupling connection of HI ductile iron ductile iron

The device belongs to the field of mechanical engineering, and more precisely to the connection of pipelines, heating systems, cold and hot water supply, etc.

A flange connection of pipelines is known (see certificate No. 10437 6F16L27 / 04, published No. 7 of 1999, GTMGTO), in which flanges are fixed at the ends of the pipes to be connected, sealing occurs through a connecting element interacting with the chamfer of one of the flanges. This technological solution does not provide high reliability of the connection.

It is also known to connect metal pipes using a crimp cylindrical sleeve (see certificate No. 10436 6F16L13 / 14, published No. 7 1999, PMGTO). The device has a friction clutch and a sealing element with an annular flange installed in the gap between the ends of the pipes, adopted as a prototype.

The disadvantage of this technical solution is that it is an integral pipe connection, as well as the need for high accuracy of alignment of the connected pipes, which is difficult to achieve in zero conditions.

The technical solution is based on the task of creating such a connection of pipelines that allows for the replacement of failed pipeline elements, and would also provide a sufficiently high level of tightness of the connected pipeline elements from ductile iron with nodular graphite.

To do this, end grooves 1 are made at the ends of the pipes, followed by a thread 2. Moreover, on one side the end grooves are twice as long as on the other and, exactly, the thread at this end is twice as long big one. The coupling 3 also has one end twice as long as the other with a thread cut inside and made grooves into which the O-rings 4 are laid, a shoulder 5 is made from the outer part of the coupling, in which there are turnkey holes 6. The pipe from turning is fixed by stoppers 7,

In FIG. 1 - shows a sleeve connection of pipes made of cast iron with spherical graphite before starting assembly in section.

In FIG. 2 - the same sectional connection after assembly.

The coupling joint is assembled as follows: the coupling with the long end is screwed onto a pipe with a longer threaded part and with an end groove against the stop of FIG. 1, and then screwed, while screwing onto another pipe with a short threaded portion and the groove of FIG. 2.

MPK7R16L 15/00

This coupling joint of high-strength cast iron with spherical graphite allows for quick replacement of pipeline elements in the event of failure of one or more pipes, without the use of welding.

Claims (1)

The sleeve connection of pipes made of ductile iron with spherical graphite, including the sleeve, the connected ends of the pipes with end sections, characterized in that the threaded elements are placed inside the sleeve, and the end sections of the pipes interact with the O-rings located in the grooves of the sleeve, and the pipes are secured against rotation by stoppers at the same time, a collar with turnkey holes is made on the coupling.