RU2415330C2 - Device for connection of communications - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: device consists of case with two coaxial spherical intercommunicated cavities. Spherical connecting pipes with axial channels performing angular transfers relative to lengthwise axis of the case are installed in the spherical cavities. The connecting pipes are constricted in the case with nuts of working spherical surface and a conic cavity expanding towards an external end. Support elements are made in the case; lugs on external surfaces of nuts interact with these elements. The spherical connecting pipes are packed in the case by constricting a rubber element with the nut via a fluoroplastic element.

EFFECT: connection of non-axial joined parts at communication.

2 cl, 3 dwg

Description

The invention relates to mechanical engineering and can be used to connect communications (for example, pipelines), in particular when the axes do not coincide, it allows you to compensate for their displacement, as well as the angular distortions of the axes of the joined elements.

Known swivel high pressure pipelines according to the patent of the Russian Federation No. 2154223, class. F16L 23/00, publ. 08/10/2000, including a threaded fitting with a spherical sealing surface, a union nut with a supporting surface, a thrust washer with a spherical thrust surface and a tip.

This connection allows you to compensate for the angular distortions of the joined parts of pipelines of small bore sections.

The disadvantage of this design is the limited functionality, because Compensation is carried out only during assembly of the joint, subsequently it remains stationary.

As a prototype of the proposed technical solution, a device for connecting communications with working fluids according to the patent of Germany No. 3802632, class. F16C 11/06, publ. 08/10/89

The known device comprises a housing with a coaxial spherical groove, in which a spherical fitting with axial channels is mounted with the possibility of angular movement. The housing consists of three parts: in two interconnected spherical element of the fitting, and the third is mounted on its shank. The fitting is pressed in the housing through the O-rings.

The disadvantage of this invention is the complexity of the design. A large number of parts entails the use of a large number of seals during assembly, which adversely affects the reliability of the device.

In addition, the seal that seals the fitting in the housing does not provide complete sealing, which leads to leakage of the working fluid. This led to a complication of the design, providing for the introduction of additional elements for draining excess fluid generated due to insufficient tightness of the nozzle.

In addition, this device is designed to connect the communication lines through which the transportation of fluids between the consumer and the source, but it can not be used for docking the connected communications.

The problem solved by the invention is to expand the operational capabilities of the device while simplifying the design.

The technical result achieved using the present invention is as follows:

- connection of communications by docking with misalignment of the mating elements, incl. in inaccessible places without the direct involvement of a person;

- ensuring reliable sealing of the connected elements;

- the ability to transport fluid through a connected communications at high pressure at an ambient temperature of -50 ° C to + 50 ° C;

- the possibility of reusable use of the device.

To solve this problem and achieve a technical result in a known device for connecting a communication line containing a housing with a coaxial spherical groove made in it, in which a spherical fitting with an axial channel is mounted with the possibility of angular movement relative to the longitudinal axis of the housing, pressed in the housing through an annular seal,

according to the invention

a second spherical groove is made in the housing, coaxial with the first and communicating with it, in which, with the possibility of angular movement relative to the longitudinal axis of the housing, a second spherical fitting with an axial channel and a tapered chamfer at the outer end is installed. The fittings are tightened in the housing with nuts with a working spherical surface and a conical groove with an extension to the outer end. Supporting elements are made in the housing, with which protrusions on the outer surfaces of the nuts interact. The sealing of the spherical fittings in the housing is carried out by tightening the rubber ring with a nut through the fluoroplastic ring.

The location in the same cylindrical body of two spherical fittings in such a way that the intersection points of the axes of the spheres of the fittings coincide with the axis of the cylindrical body, allows for angular movements of the fittings to compensate for the deviations of the axes of the two joined elements of the connected communications.

The implementation in the housing of two coaxial spherical grooves communicating with each other, and the installation of spherical fittings with axial channels in them, allow connecting volumes of interconnected communications and transporting the working medium to a receiving device.

Spherical fittings in the spherical grooves of the body are fixed with nuts with working spherical surfaces. The axes of the spherical surfaces of the nuts and the spherical grooves of the housing coincide, and a single spherical space is created in which the spherical fitting is enclosed. To limit the preload force of the fittings in the housing, support elements are made with which the protrusions on the outer surface of the nuts interact. This provides the necessary and sufficient force to compress the spherical fittings and the free axial rotation of the fitting in the housing. A conical groove with expansion to the outer end of the nut creates an additional degree of freedom of rotation - the angular movement of the spherical fitting, which facilitates the operation of combining the joined elements of the connected communications.

The conical chamfer at the outer end of the second fitting is functionally a lead-in and facilitates docking with a receiving device, on which a tapered lead-in chamfer is also assumed to be reliable. The fulfillment of this condition makes it possible to greatly facilitate the docking, and the bevels act as a guarantee that the docking will take place.

To seal the spherical fittings in the housing, ring seals consisting of rubber and fluoroplastic rings are used, and sealing is provided by pressing the rubber ring through the fluoroplastic ring. The PTFE ring is protective and protects the rubber ring from mechanical damage during assembly of the device. When fluids pass through the device under pressure, the fluoroplastic ring protects the rubber ring from “flowing” in the cavity between the nut and the housing, the nut and the fitting. This ensures reliable sealing of spherical fittings in the housing.

The set of essential features of the claimed invention allows not only to connect the communications for transporting the working environment, but also to dock these communications even when misaligned mating elements. Moreover, using the inventive device, docking is possible in places inaccessible to human intervention. This ensures reliable sealing of interconnected communications. A small number of elements included in the device, ensures its reliability, ease of assembly and disassembly, the possibility of reusable use.

The figure 1 shows a General view of the claimed device.

The figure 2 shows a General view of the claimed device with a mating element, provided that the axis of the mating parts are offset.

The figure 3 shows a General view of the claimed device, provided that the axis of the joined parts are located at an angle.

A device for connecting communications (Fig. 1) includes a housing 1 with spherical grooves 2, in which spherical fittings 3 and 4 are installed. The fittings are sealed in the housing using rubber rings 5 and fluoroplastic rings 6. Fittings 3 and 4, rubber rings 5 s fluoroplastic rings 6 are pressed in the housing with nuts 7. The compressive forces are limited by the supporting element 8 in the housing 1 and the protrusion 9 on the outer surface of the nut 7. Locking of the nut 7 is carried out by punching. The fitting is pressed by the spherical surface 10 of the nut 7, and the rubber rings 5 with the fluoroplastic rings 6 are pressed by the end face of the nut 7. On the fitting 4 there are sealing rings 12, which provide sealing of the joint, and a conical chamfer 13 is made on its outer end face. Figure 2 shows the receiving element 15 with a lead-in conical chamfer 14.

The operation of the device is as follows. When docking, the fitting 4 of the input chamfer 13 is in contact with the input chamfer 14 of the receiving element 15 (see figure 2). Further, while continuing the progressive movement of the nozzle 4 into the receiving element 15, the nozzle 4 enters the receiving element 15 as much as provided by the assembly design of the device with the receiving element 15. In the event that the axis of the nozzle 3 does not coincide with the axis of the receiving element 15 (Fig. 2 -3), the housing 1 rotates on the fittings 3 and 4 and occupies the desired position, while the fitting 3 should take its final position.

An experimental verification of the device’s performance has been carried out. The results showed that the device provides compensation for the displacement of the axes during docking, and also it is resistant to climatic influences. The tightness of the device is maintained at a pressure reaching 2000 atmospheres (the possibility of the installation on which the tests were conducted).

Claims (2)

1. A device for connecting communications, comprising a housing with coaxial spherical grooves made in it, in which two spherical fittings are installed with the possibility of angular movement relative to the longitudinal axis of the housing, in each of which an axial channel is made, and one of them is made with a conical bevel on the external the end, while preloading the fittings in the housing is carried out with nuts with a working spherical surface and a conical groove with expansion to the outer end, and on the outer surfaces of the nuts protrusions are made for interactions with supporting elements of the housing. 2. The device according to claim 1, characterized in that the sealing of the spherical fittings in the housing is carried out by tightening the rubber ring with a nut through a fluoroplastic ring.

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