RU10824U1 - SWIVEL DEVICE FOR CONNECTING PIPELINES - Google Patents

Abstract

An articulated device for connecting pipelines, the end of the first of which is placed concentrically in the socket of the second pipeline, including a seal in the form of chevron cuffs placed between the support and pressure rings, characterized in that the means for automatically pressing the seal is made in the form of thrust bearings placed on both sides a collar, which is made on the first pipeline, and interacting through a support ring with a seal.

Description

Object - Utility Model

Pivot joint device

The utility model relates to the field of mechanics, namely, connections that allow mobility, and can be used to connect evaporative cooling pipelines of powerful heating furnaces with movable beams.

Known articulation of pipelines located coaxially with stuffing box packing. The thrust bearings are made in the form of metal rings (see US Pat. Germany No. 873779, class 41 f, 13).

Known articulation of pipelines, consisting of two coupling halves and a split ring. A layer of antifriction material, for example, powdered graphite, or a set of antifriction rings is placed in the annular gap between the diaphragm and the inner surface of the coupling halves. Such a constructive implementation of the connection of the pipelines increases the rearward displacement of the pipelines being connected and reduces the voltage in the diaphragm (see USSR AS No. 264864, class F16L).

A vacuum swivel flange joint is known by means of a spacer placed between the flanges. The spacer is made of two mutually rotating parts, one of which is attached to the first flange and wraps around the other part attached to the second flange. In both parts there are channels for supplying coolant washing the inner surfaces of both one and the other parts of the spacer. The male spacer has an internal cavity with an elastic packing that is sealed by exposing it to an end pressure element, for example, a washer. Balls are located between both parts of the spacer to allow their mutual rotation, and the parts of the spacer are mutually sealed with a mechanical seal (see USSR AS No. 318780, class F16 L27 / 00).

A device is known for connecting relatively rotating coaxial pipelines, the end of the first of which is placed concentrically in the cylindrical socket of the second pipeline. The connection includes a sealing gasket placed in the annular gap between the outer surface of the first pipeline and the inner surface of the socket of the second pipeline, a support ring and means for automatically pressing the sealing gasket, made in the form of a pressure ring located not on the first pipe and fixed from the axial displacement towards the end of the last . The device has two intermediate

IPC F16L27 / 00

rings that are placed between the support ring and the comfort packing. Gaps are formed between the outer surface of the intermediate ring from the side of the support ring and the inner surface of the socket of the second pipeline and between the inner surface of the other intermediate ring and the outer surface of the end of the first pipeline. V - shaped annular grooves are made on the end surfaces of the intermediate rings and balls are installed between them. The intermediate ring is locked at the end of the first pipe by means of a retaining ring. The support ring is locked against rotation. This design increases the reliability of the device (see AS USSR No. 1241000, class F16 L27 / 00).

It is known for connecting relatively movable coaxial pipelines, the end of the first of which is placed in the cylindrical socket of the second. Between the outer surface of the first pipeline and the inner surface of the second is placed a sealing gasket, which is made in the form of a set of alternating sealing cuffs and spacer rings. Means for automatically pressing the packing is made in the form of a pressure ring located on the first pipeline and interacting with the sealing gasket for pressing it, while the bell of the second pipeline is equipped with means for cooling the connection. A support ring is placed between the pressure ring and the pressure pad (see AS USSR No. 1040264, class F16 L27 / 00).

A disadvantage of the known design is the low resistance of the sealing elements.

Closest to the technical nature of the claimed utility model is the articulation of pipelines concentrically placed in a cylindrical socket of the second pipeline. The seal between these parts of the hinge is achieved by chevron asbestos-cuffs located between the two rings, the support and the pressure. The axial force from the pressure in the system is transmitted to the thrust bearing, which is located in the cover, and on the other hand is pressed by the ring. The thrust ball bearing is fixed to the shaft using two half rings. The radial force is transmitted to the two support rings, on which the end of the first pipeline rests. Both halves of the hinge are pulled together with studs. The swivel joint of the pipelines is equipped with grease fittings for the lubrication of chevron rings and ball bearings (see research report Development and research of swivel joints for evaporative cooling systems of powerful heating furnaces of rolling mills, VNIPICHermet electric cleaning, 1981, inventory no. 02811016296).

the hinge components, and an overwhelmingly large number of pipe connections of the evaporative cooling system of the movable beams of the heating furnace (up to 120) leads to the high cost of initial manufacturing, the complexity of installation and complicates maintenance and repair during operation.

The inventive utility model is aimed at solving the problem of increasing the durability of the sealing elements by simplifying the design of the articulated device and reducing the complexity of manufacturing, installation and maintenance.

The problem is solved as follows. In the known hinged device for connecting pipelines, the end of the first of which is placed concentrically in the socket of the second, including sealing in the form of chevron cuffs placed between the support and pressure rings, and means for automatically pressing) sealing, the latter is made in the form of two thrust bearings, which are placed along both sides of the collar made on the first pipeline. Through the thrust ring, the bearings interact with the seal in the form of chevron rings.

The essence of the utility model is illustrated by the drawing, which shows the swivel connection of pipelines.

The hinged device for connecting the pipelines is the end of the first pipe 1, concentrically placed in the socket of the second pipe 2. In the annular gap between the external surface of the first pipe 1 and the inner surface of the socket of the second pipe 2, a seal is installed in the form of chevron cuffs 3, located between the supporting 4 and pressure 5 rings.

Means for automatic tightening 3 of the seal 3 is made in the form of two thrust bearings 6 and 7, which are placed on both sides of the shoulder 8. The shoulder 8 is made on the outer surface of the first pipe 1. The end face of the socket of the second pipe 2 is closed by a pressure flange 9.

When steam is supplied to the pressure system, it will be transmitted to the cuffs 3 through bearings 6 and 7 and the support ring 4. With increasing pressure, the thrust cuffs 3 are sealed. On the other hand, the swivel is closed by flange 9. To tighten the chevron cuffs 3, tighten the bolts that tighten the flange 9 with the flange of the socket of the second pipe 2.

The section is simpler to install with the known articulated device, where the connection of pipelines is provided mainly by embedded parts and various rings, which do not provide a reliable connection of pipelines performing movement in different planes. Hence the frequent breakdowns, the need to manufacture a large number of parts and their installation.

In the proposed utility model, a shoulder on one of the pipelines replaces a large number of embedded parts of the pressure device in the sealing assembly.

Claims (1)

An articulated device for connecting pipelines, the end of the first of which is placed concentrically in the socket of the second pipeline, including a seal in the form of chevron cuffs placed between the support and pressure rings, characterized in that the means for automatically pressing the seal is made in the form of thrust bearings placed on both sides a collar, which is made on the first pipeline, and interacting through a support ring with a seal.