RU2447332C1 - Connection of cylindrical parts - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: connection of cylindrical parts, which comprise a tubular casing and an end part, is carried out with the help of a stop element installed in combined circular bores arranged on connecting surfaces of connected parts. A stop element is an open ring with ends bent inside and outside, and a through slot is formed within the borders of the combined circular bores in the tubular casing, as well as a dead slot on the end part transiting one into the other. In the dead slot there is a hole for fixation of the end of the open ring and threaded holes for positioning of parts with each other with the help of stop screws.

EFFECT: reliable fixation and positioning of connected cylindrical parts in the specified position at minimum dimensions and simplified assembly of the connection design.

3 cl, 4 dwg

Description

The invention relates to equipment for the oil industry and can be used in submersible oil production units as a mechanical connection of two parts.

Known are the connections of the head and body of the stator of a submersible electric motor having a cylindrical shape, made using threads or flanges fastened with bolts (see, for example, RF patent No. 84075, IPC F04D 13/10, 2006). Such compounds are widely used in the manufacture and operation of oil immersion equipment.

The disadvantages of the threaded connection are the complexity of installation during operation and the inability to position parts relative to each other.

The disadvantages of bolted flange connections include increased diametric dimensions, limiting its use in submersible installations of small size.

Closest to the claimed technical essence is the connection of cylindrical parts by means of a snap ring installed in a groove of the housing of the retainer ring with evenly spaced protrusions and castellated teeth. The protrusions of the retaining ring are carried out through the grooves of the housing, after the retaining ring enters the groove, it is rotated in the circumferential direction inside the groove until the crown teeth are aligned with the grooves of the housing, and then the crown teeth are bent into these grooves of the housing (see, for example, the RF patent on application No. 2009116996, IPC F16B 17/00, F16B 21/00, publ. 10.11.2010).

The disadvantage of this connection is the complex shape of the retaining ring and the complexity of its installation due to the operation of bending the teeth of the ring into the grooves on the housing.

The present invention provides reliable mounting and positioning of the connected parts in a predetermined position with minimal dimensions and simplifies installation of the connection structure.

The specified technical result is achieved by the fact that in the connection of cylindrical parts containing a tubular body and an end part, using a locking element mounted in the combined annular grooves located on the contact surfaces of the connected parts, according to the invention, an open ring is used with the locking element bent outward and through the ends, and within the combined annular grooves, a through groove in the tubular body and a blind groove on the end part, forming not into each other, while in the blind groove there is a hole for fixing the end of the open ring and threaded holes for positioning the parts with each other using locking screws.

Ring grooves can be made with a rectangular or semicircular section. To position the parts in the circumferential position, the through groove is made perpendicular to the longitudinal axis of the housing to a depth exceeding the thickness of the wall of the housing by 1.5-2 times, thereby opening the housing.

The essence of the invention is illustrated by drawings, where figure 1 shows the connection in assembled form; figure 2 - connected tubular body and end piece before assembly; figure 3 - locking element; figure 4 is a transverse section of the connection.

The cylindrical tubular housing 1 and the end piece 2 included in the housing 1 are connected by means of a locking element 3 and locking screws 4 (Fig.1-4). An annular groove 5 of a semicircular or rectangular profile is made on the inner surface of the tubular body 1 from the end face, which is blocked by a through groove 6 (Fig. 2) located in the transverse direction, perpendicular to the longitudinal axis of the housing 1. The depth of the through groove 6 is 1.5-2 times the wall thickness of the tubular body 1, its inner edges pass into a flat area of the blind groove 7, which runs along the annular groove 8, made on the outer surface of the end piece 2 mating with the housing 1. the mouths 5, 8 are mirrored and aligned with each other. On the site of the blind groove 7 there are two threaded holes 9 for the locking screws 4, designed to position the tubular body 1 and the end piece 2. The locking element 3 is an open ring, the end 10 of which is bent back, and the end 11 is inward (Fig.3) . To fix the end 11 on the annular groove 8 there is a hole 12. The locking element 3 is made of a steel bar, the cross-sectional shape of which corresponds to the profile shape of the combined grooves.

The assembly of the proposed design is as follows. In the tubular casing 1, an end piece 2 is installed along the mating surface, while the annular grooves 5 and 8 on the casing 1 and the end part 2 must coincide, forming an annular hole 13 of round or rectangular cross section (Fig. 4). The hole 12 for fixing the locking element 3 on the end piece 2 is placed opposite the through groove 6 on the housing 1. The end 11 of the locking element 3 is hooked to the hole 12 on the end piece 2 and partially inserted into the annular hole 13. After that, the housing 1 and the end piece 2 are rotated relative to each other and the locking element 3 is completely placed in the annular hole 13, resting its end 10 on the lower wall of the through groove 6 (figure 1), which in this case is limited from the end part 2 by the area of the blind groove 7. Position The casing 1 and the end part 2 in the circumferential position are mounted by installing two or one screw 4 on the end part 2. The end part 2 can be additionally provided with a groove 14 for the sealing ring, thereby ensuring the tightness of the connection of this design. Disassembly of the proposed connection is performed in the reverse order.

The present invention can be used when connecting two tubular bodies to each other.

Thus, the present invention allows to connect the tubular body and the end piece with a minimum size, while ensuring their reliable positioning relative to each other. With ease of installation, the claimed design is able to work under loads comparable to the magnitude of the loads of bolted flange or threaded connections.

Claims (3)

1. The connection of cylindrical parts containing a tubular body and an end piece, using a locking element mounted in a combined annular grooves placed on the contact surfaces of the connected parts, characterized in that an unclosed ring with ends bent outward and inward is used as a locking element, and within the combined annular grooves, a through groove is formed in the tubular body and a blind groove at the end part passing into each other, while a hole is made in the blind groove an assembly for fixing the end of an open ring; and threaded holes for positioning parts with each other using locking screws. 2. The compound according to claim 1, characterized in that the annular grooves are made with a rectangular or semicircular section. 3. The compound according to claim 1, characterized in that the through groove is made perpendicular to the longitudinal axis of the housing to a depth exceeding the wall thickness of the housing by 1.5-2 times.

Images