RU2464478C1 - Quick-detachable connection of pipelines - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: connection includes nozzle and nipple parts which are tightly connected to each other, to the appropriate branch pipes, as well as to control device. Nozzle part includes housing with collar with three slots, and with seat, shutoff element in the form of spring-loaded spool valve with seal, which is installed in support in movable manner. Nipple part includes housing, shutoff element in the form of spool valve with seal, which is connected to pusher and installed in housing in movable manner by means of coupling and sleeve of guide. Coupling is connected to control device; on its cylindrical part included in the housing there are two screw slots ending with straight-line sections, and on the coupling edge there installed are three pins interacting with three slots of housing of nozzle part. Pusher is made in the form of a plate in through hole of which there installed is axis the ends of which protrude beyond the pusher edges and enter screw slots of the coupling. On internal surface of sleeve of the guide there made are two longitudinal slots retaining and guiding the pusher, and in end part of sleeve there installed are three projections with possibility of interaction with slots of housing of nozzle part.

EFFECT: invention provides tightness and reliability of the connection.

4 cl, 3 dwg

Description

The invention "Quick disconnect pipe connection" relates to pipe fittings and is intended for quick connection (disconnection) of flexible pipelines transporting liquid (oil products, water and other non-aggressive media) with high pressure and high flow rate of the fluid.

It is known "Quick disconnect connection of pipelines", p. RU 2283452, IPC F16L 37/00, published 10.09.2006, which includes two coupling halves connected using a ball lock. The coupling halves are hermetically connected to the pipelines and each coupling half has a sealing seat against which a locking member abuts against the sealing element. Each locking element has an additional valve with ball lock, which serves to relieve residual pressure in one of the coupling halves before they are connected. A significant drawback of the design of the connection is the inability to maintain the working pressure in the coupling halves until they are connected to pump the medium due to leaks.

Known "Device for connecting pipelines" p. RU 2143630, IPC ⁶ F16L 37/28, published 12/27/1999, which includes a stationary and removable housing. The connection of pipelines occurs due to the rotation of the nut of the tightening device. The stationary housing has a spring-loaded movable sleeve with sealing elements and a valve with a seal and an emphasis designed to open the pipe connection. The replaceable housing with a tightening device and sealing elements comprises a spring-loaded valve with a seal; wherein the spring of the replaceable housing has a force greater than the spring in the stationary housing by an amount that ensures the continuity of the connection in the replaceable housing by the amount of compression of the spring in the stationary housing until the valve stops against the end of the housing. A significant disadvantage of the invention is the need for accurate calibration of the springs in removable and stationary housings to ensure indissolubility of the connection in the removable housing, which negatively affects the operational characteristics. Another disadvantage of this technical solution is the lack of speed when connecting pipelines with a tightening device, which also negatively affects the operational characteristics.

It is known “Quick disconnect connection of pipelines”, paragraph RU 2170873 IPC ⁷ F16L 37/30, published July 20, 2001, which includes a locking half-coupling with a spring-loaded valve and a sealing element and a collet coupling with a spring-loaded valve and a sealing element. The locking half-coupling has sealing rings on the outer surface to create a seal in the socket of the collet half-coupling when they are connected. The coupling halves are connected by a collet and a spring-loaded fixing sleeve of the collet coupling.

To increase the flow of medium, the half-coupling valves have flats. A significant drawback of the proposed solution is the inability to provide a large flow rate of the working medium when pumping liquid media.

The closest to the claimed device analogue (prototype) is "Quick disconnect connection of pipelines", p. RU 2289060 IPC F16L 37/28, F16L 37/40, published 10.12.2006. The connection includes a nipple part with a housing, a locking element and a seal and a fitting part with a housing, a locking element and a seal, as well as lever seal devices. The sealing of the nipple part in the open state is carried out by a forced lever system (sealing device) mounted on the housing and connected to the tubular locking element, which moves until it touches the end face of the saddle mounted on the bottom of the deaf insert, which has grooves on the lateral surface for passage of the medium. A similar open seal system is also available in the fitting part of the connection. The pipelines are connected and the medium flow is ensured by introducing the outer surfaces of the nipple part with the sealing element into the inner surfaces of the fitting part, followed by clamping with clamps on the collars of both parts and forcing tubular locking elements in opposite directions by lever devices (control device). When the pipelines are disconnected, all the actions described above occur in the reverse order.

Significant disadvantages of the connection are: insufficient reliability of the metal seal on the metal of the tubular locking elements and seats in the nipple and fitting parts, as well as the lack of tightness under pressure of the medium when open; another disadvantage is the large number of control elements for connecting the pipeline (two lever systems and a clamp), which reduces the speed of the connection.

The objective of the invention is to ensure operational reliability, efficiency and efficiency.

The problem is achieved in that the locking elements of the choke and nipple parts are made in the form of spools with the possibility of their contact with each other, while in the choke part there is a collar with three grooves, the spool is spring-loaded, equipped with a sealing element and installed in the housing with the possibility of longitudinal movement, and in the nipple part, the spool is equipped with a sealing element, connected to the pusher and mounted with the possibility of longitudinal movement in the housing by means of concentric couplings and bushings n directs, wherein the sleeve is connected to the control device, on the cylindrical coupling part two helical slots formed ending rectilinear portions. To interact with the grooves of the body of the fitting part, three fingers are radially mounted on the opposite part of the coupling, the pusher is made in the form of a plate, in the through hole of which there is an axis, the ends of which protrude beyond the edges of the pusher and enter the screw slots of the coupling, while on the inner surface of the guide sleeve two longitudinal grooves holding and guiding the pusher, and three protrusions are installed in the end part of the sleeve with the possibility of interaction with the grooves of the body of the fitting part.

In addition, the clutch in the body of the nipple part is fixed by a locking ring, allowing it to rotate and connected by fasteners to the rim of the control device, made in the form of a handle.

In addition, between the clutch and the sleeve of the guide of the nipple part, sealing elements are installed, preloaded by a wave spring.

In addition, a protective ring is installed at the end of the nipple part of the coupling.

The positive effect of the device is achieved due to new design features and a number of sealing elements and is to ensure reliability through the use of a protective ring, simplicity and speed of connection due to the proposed kinematic design scheme and tightness due to sealing elements.

The device is illustrated by drawings, which depict:

figure 1 - General view of the device (in the "open" position);

figure 2 - General view of the device (in the "closed" position);

figure 3 is a section aa of the device (in the closed position).

The device includes two parts: fitting "A" and nipple "B". The fitting part “A” includes a housing 1 (FIGS. 1, 2, 3), with a seat “a” (FIG. 2) and a sealing element 3, a spring 4, a support 5 in the form of a cross with holes for ensure the passage of the working medium, the device provides tightness under pressure in the closed position (figure 2, 3). The housing 1 is structurally made with a shoulder "b", having three grooves "c" for engagement with the nipple part "B" of the device (Fig.1, 2, 3). The nipple part “B” includes (FIGS. 1, 2, 3) the housing 6 connected to the coupling 7 by the nut 8 and the locking ring 9. In the end part of the coupling 7 the fingers 10 are rigidly fixed, interacting with the grooves “c” of the housing collar “b” 1 of the fitting part "A" when connected to the nipple part "B", on the cylindrical part of the coupling 7 there are two screw through slots "g" (Fig. 1), the ends of which end in straight sections "d". In the body of the nipple part, a spool 11 is installed with a sealing element connected by a pin 12 (Fig. 2), with a pusher 13 made in the form of a flat plate in which an axis 14 is inserted, included in the grooves "g" of the coupling 7, the guide sleeve 15 with three protrusions "h" interacting with the grooves "in" of the housing 1, the grooves "g" for guiding the pusher 13 and excluding the rotation of the spool 11 when opening the device for passage of the medium, the protective ring 16 from nicks, the rim 17 with handles 18 (control device), rigidly connected to the clutch 7 fasteners. The spool 11 is installed in the housing 6 by means of the guide sleeve 15 and the coupling 7 with the possibility of movement along the longitudinal axis of the guide sleeve 15 and contact with the spool 2. The spools 2, 11 are moved by a pusher 13 connected to the spool 11 by a pin 12, when the axis 14 interacts with the screw slot "g" and straight grooves "d" of the coupling 7. When the control device is rotated counterclockwise by the arms 18, moving along the axis of the device, the spool 11 exits the bore of the guide sleeve 15 and pushes the spool 2, compressing the Zhin 4, opening the holes of the device for the passage of the medium (figure 1). The clutch 7 with fingers 10 and the sleeve guide 15 with its protrusions “h”, interacting with the grooves “c” of the housing 1, ensure the connection of the fitting “A” and the nipple “B” of the parts and the passage of the working medium is opened when the arms 18 are turned counterclockwise by about 75 ° until the axle 14 stops at the end of the rectilinear section “d” of the slot “g” of the coupling 7 and fixing the device in the open position. The tightness between the movable and fixed elements of the device is ensured by the sealing elements: 19 - between the inner bore of the shoulder "b" of the housing 1 and the outer diameter of the guide sleeve 18, 20 - between the outer diameter of the spool 11 and the inner bore of the guide sleeve 15, 21 - between the inner bore of the coupling 7 and the outer diameter of the guide sleeve 15, 22 between the outer diameter of the coupling 7 and the inner diameter of the housing 6, 23 between the end of the coupling 7 and the inner bore of the housing 6. To ensure the tightness of the nipple Asti "B" in the open position the sealing elements 20, 21, preload sleeve 24, washer 25 and a wavy spring 26.

The device operates as follows. The fitting “A” and the nipple “B” parts (FIGS. 2, 3) are interconnected by moving along the axis of the device towards each other, with their bore, the coupling 7 is put on the shoulder “b” of the housing 1, fingers 10 enter the grooves “into "The housing 1, located behind the end surface of the shoulder" b ", and the sleeve guide 15 with its protrusions" z "simultaneously enters into the grooves" c ", providing translational movement of the spool 11 along the axis of the device; when the arms 18 are rotated counterclockwise, the axis 14 emerges from the straight sections “d” of the slot “g” of the sleeve 7, and the fingers 10 simultaneously extend beyond the rear side of the shoulder “b” of the housing 1, the device is connected in the closed position (FIG. 2, 3). With further rotation of the handles 18 counterclockwise, the axis 14 moves together with the pusher 13, the pin 12 and the spool 11 along the axis of the device, the spool 11 and the sealing element 20 come out of the bore of the guide sleeve 15 by pressing on the spool 2 of the fitting "A". The spool 2, compressing the spring 4, moves away from the saddle "a" of the housing 1, opening the passage to the working medium (figure 1), fixing the device in the "open" position is provided by turning the handles 18 clockwise until the axis 14 stops in the straight section "d" slot "g" at the opposite end of the sleeve 7 (not shown conditionally).

Disconnecting the device and stopping the flow of the working medium occurs as follows: the handles 18 are turned clockwise, the protruding ends of the axis 14 slide along the slots “g” of the coupling 7, the spool 11 returns to its original position (figure 2, 3), freeing the spool 2 of the housing 1 The sealing element 3 of the spool 2 sits on the seat “a” of the housing 1. The flow of the working medium in the fitting part “A” is stopped when the protruding ends of the axis 14 enter the straight sections “d” of the slots “g” of the coupling 7. The nipple part “B” locks, stopping passage working fluid, the fingers 10 are located against the grooves "a" shoulder "b" of the housing 1, choke "A" and pin "B" parts are separated by moving relative to each other along the axis in opposite directions.

The positive effect of the device lies in the simplicity and speed of the connection due to the proposed kinematic design scheme and a small number of control elements (which ensures the efficiency of work), the efficiency is achieved by the ability to pump a large amount of liquid by opening a larger passage area, the use of a protective ring increases the reliability and tightness of the connection achieves both in open and in working condition due to sealing elements.

Claims (4)

1. A quick connection of pipelines containing a fitting with a housing with a seat, a locking element and a seal, as well as a nipple part with a housing, a locking element and a seal, which are hermetically connected to each other and with the corresponding inlet and outlet nozzles, and a control device, characterized in that the locking elements of the fitting and nipple parts are made in the form of spools with the possibility of their contact with each other, while in the fitting part a shoulder with three grooves is made, the spool is spring-loaded, equipped with by a mating element and is mounted with the possibility of longitudinal movement in the housing by means of a support, and in the nipple part, the spool is provided with a sealing element, connected to the pusher and mounted with the possibility of longitudinal movement in the housing by means of concentric couplings and guide bushings, while the coupling is connected to the control device , on the cylindrical part of the coupling two screw slots are made, ending in straight sections, at its end there are three fingers with the possibility of interaction there are three grooves in the body of the fitting part, and the pusher is made in the form of a plate, on the free end of which the axis is mounted, with the possibility of sliding of the protruding ends of the axis along the screw slots of the coupling, while on the inner surface of the guide sleeve there are two longitudinal grooves guiding the pusher the end part has three protrusions with the possibility of interaction with the three grooves of the body of the fitting part. 2. The quick-connect pipe connection according to claim 1, characterized in that the clutch is installed in the body of the nipple part by means of a nut and a locking ring and is connected to a control device, which is made in the form of a handle, by means of a rim and fasteners. 3. The quick disconnect pipe connection according to claim 1, characterized in that between the clutch and the guide sleeve there are installed sealing elements pre-pressed by a wave spring. 4. The quick disconnect pipe connection according to claim 1, characterized in that a protective ring is installed at the end of the coupling.

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