RU2555603C1 - Angular displacement compensator for pipelines - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: angular displacement compensator for pipelines comprises main line bellows and articulated rotating device, located on axis of the bellows between pillars, connecting the device with opposite ends of the bellows. The rotating device is located in the tight shell connected with the environment by means of the drain channel (tube). The tight shell comprises the internal bellows, support bushes and two hollow fairings permanently secured with each other. The rotating device comprises a spherical bearing secured on stud by means of the pin, at that the external sphere interacts with the internal sphere of the clevis, and external cylindrical surface of the stud interacts freely with the internal cylindrical surfaces of the fork.

EFFECT: exclusion of ignition and contamination of the work products with abrasive wear particles of the friction pairs in the rotating device, partial unloading of the rotating device, reduced dimensions in radial direction.

3 cl, 1 dwg

Description

The invention relates to mechanical engineering and can be used in pneumatic and hydraulic systems of other industries transporting aggressive and explosive atmospheres.

Known compensators for the angular movement of pipelines, a bellows-type with ring cardan rotary devices placed in the internal cavity of the main bellows and located on the outer contour of the pipe cross-section: US patents No. 2936185 of 03/01/1956, cl. 285-226 and No. 3112129 of 09/08/1958, class. 285-226; UK patents No. 792476 from 08/03/1955, CL 99 (J) F06l and No. 1039461 dated January 25, 1963, class F2G6D and F06l.

The disadvantages of the above patents is:

- the possibility of clogging the transported product with particles of abrasive wear of the rubbing parts of the rotary devices;

- danger of fire during transportation of explosive product;

- lack of unloading of rotary devices from the effects of spacer forces acting in the trunk bellows.

Known expansion device - US patent No. 2901272 from 01/09/1956, class. 285-226 (prototype).

It consists of two series-connected trunk bellows. The power connection of the opposite ends of the device is carried out through the pylons, between which a Hook joint is installed, located on the same axis as the bellows.

The device has all of the above disadvantages characteristic of analogues. In addition, it should be noted that the crosspiece of the Hook joint has large dimensions in the radial direction.

The location of the cardan on the axis of the expansion device constructively eliminates the possibility of clogging and fire of the transported product due to the isolation of rubbing surfaces using a closed flexible shell, such as a bellows. The use of a bellows shell allows partial unloading of the cardan from axial forces.

An object of the invention is the creation of a compensator for the angular movement of pipelines with improved characteristics when transporting aggressive and explosive products by eliminating the clogging and fire of work products by particles of abrasive wear of rubbing pairs in a rotary device, partial unloading of the rotary device and reduction of its dimensions in the radial direction.

The problem is solved due to the fact that in the known compensator for the angular movement of pipelines, consisting of a main bellows and an articulated rotary device located on the axis of the bellows between the pylons connecting the rotary device with the opposite ends of the bellows, according to the invention, the rotary device is placed in a sealed shell connected to the surrounding environment using a drainage channel, the hermetic shell consists of an internal bellows, support bushings and two hollow fairings, n fixedly connected to each other, and the rotary device consists of a spherical bearing mounted on the finger with a pin, while the outer sphere interacts with the inner sphere of the earring, and the outer cylindrical surface of the finger movably interacts with the inner cylindrical surfaces of the fork.

The figure shows the design of the proposed compensator for the angular movement of pipelines, where:

1 - trunk bellows;

2 - a basic ring;

3 - rotary device;

4 - spherical bearing;

5 - finger;

6 - pin;

7 - earring;

8 - thrust;

9 - supporting sleeve;

10 - fork;

11 - thrust;

12 - supporting sleeve;

13 - pylon;

14 - sealed shell;

15 - drainage channel (tube);

16 - fairing;

17 - internal bellows.

The proposed compensator consists of a main bellows 1 with support rings 2 welded to it and a rotary device 3, which includes a spherical bearing 4, mounted on a pin 5 with a pin 6. The outer spherical surface of the bearing 4 interacts movably with the inner spherical surface of the earring 7, made at the same time with the thrust 8, mounted on the supporting sleeve 9.

The outer cylindrical surface of the finger 5 movably interacts with the inner cylindrical surfaces of the fork 10, made integral with the rod 11, mounted on the support sleeve 12. The support sleeve 9 and 12 are fixedly connected to the support rings 2 using pylons 13.

The rotary device 3 is placed in an airtight shell 14 connected to the environment by means of a drainage channel (tube) 15. The hermetic shell 14 consists of fairings 16, support sleeves 9, 12 and an internal bellows 17 between them.

The compensator works as follows.

If there is operating pressure in the lines in the main bellows 1, a spacer force is applied, and in the internal bellows 17, a compressive force. As a result of this, the rotary device 3 is partially unloaded and perceives an axial load equal to

F _o = p (f _m -f _int ),

Where:

F _o - axial force perceived by the rotary device;

P is the pressure of the transported medium;

f _m and f _int - the effective area of the main and internal bellows, respectively.

The drainage tube 15 is designed to control the tightness of the shell 14 in the manufacture of the compensator and maintain the ambient pressure in it during its operation.

The rotary device 3 has two degrees of freedom and allows you to compensate for the angular movement of the pipelines in the x - y plane due to the rotation of the finger 5 in the plug 10 and in the x - z plane - due to the rotation of the spherical bearing 4 in the earring 7.

The proposed compensator has the following positive properties:

- eliminates the possibility of clogging the transported product with particles of abrasive wear of the rubbing parts of the rotary device;

- eliminates the risk of ignition of an explosive product during transportation;

- the rotary device is partially unloaded from the effects of the spacer forces acting in the trunk bellows;

- the rotary device has a minimum overall dimensions in the radial direction, which reduces the hydraulic resistance of the compensator.

Claims (3)

1. The compensator for the angular movement of the pipelines, consisting of a main bellows and a swivel rotary device located on the axis of the bellows between the pylons connecting the rotary device with opposite ends of the bellows, characterized in that the rotary device is placed in a sealed enclosure connected to the environment using a drainage channel . 2. The compensator according to claim 1, characterized in that the hermetic shell consists of an internal bellows, support bushings and two hollow fairings, motionlessly interconnected. 3. The compensator according to claim 1, characterized in that the rotary device consists of a spherical bearing mounted on the finger with a pin, while the outer sphere interacts with the inner sphere of the earring, and the outer cylindrical surface of the finger movably interacts with the inner cylindrical surfaces of the fork.